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Commit | Line | Data |
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6973dcae JH |
1 | /* |
2 | * Copyright (C) 2005 Junio C Hamano | |
3 | */ | |
6973dcae | 4 | #include "cache.h" |
284098f1 | 5 | #include "tempfile.h" |
6973dcae JH |
6 | #include "quote.h" |
7 | #include "diff.h" | |
8 | #include "diffcore.h" | |
051308f6 | 9 | #include "delta.h" |
6973dcae | 10 | #include "xdiff-interface.h" |
7c92fe0e | 11 | #include "color.h" |
8c701249 | 12 | #include "attr.h" |
d5535ec7 | 13 | #include "run-command.h" |
23707811 | 14 | #include "utf8.h" |
be58e70d | 15 | #include "userdiff.h" |
851e18c3 | 16 | #include "submodule-config.h" |
752c0c24 | 17 | #include "submodule.h" |
a757c646 | 18 | #include "ll-merge.h" |
02e8ca0e | 19 | #include "string-list.h" |
82fbf269 | 20 | #include "argv-array.h" |
6973dcae | 21 | |
1510fea7 SP |
22 | #ifdef NO_FAST_WORKING_DIRECTORY |
23 | #define FAST_WORKING_DIRECTORY 0 | |
24 | #else | |
25 | #define FAST_WORKING_DIRECTORY 1 | |
26 | #endif | |
27 | ||
96f1e58f | 28 | static int diff_detect_rename_default; |
5580b271 | 29 | static int diff_compaction_heuristic; /* experimental */ |
92c57e5c | 30 | static int diff_rename_limit_default = 400; |
a624eaa7 | 31 | static int diff_suppress_blank_empty; |
d2aea137 | 32 | static int diff_use_color_default = -1; |
6468a4e5 | 33 | static int diff_context_default = 3; |
98a4d87b | 34 | static const char *diff_word_regex_cfg; |
cbe02100 | 35 | static const char *external_diff_cmd_cfg; |
6d8940b5 | 36 | static const char *diff_order_file_cfg; |
aecbf914 | 37 | int diff_auto_refresh_index = 1; |
a5a818ee | 38 | static int diff_mnemonic_prefix; |
f89504dd | 39 | static int diff_no_prefix; |
df44483a | 40 | static int diff_stat_graph_width; |
712d2c7d | 41 | static int diff_dirstat_permille_default = 30; |
be4f2b40 | 42 | static struct diff_options default_diff_options; |
07ab4dec | 43 | static long diff_algorithm; |
6973dcae | 44 | |
7c92fe0e | 45 | static char diff_colors[][COLOR_MAXLEN] = { |
dc6ebd4c | 46 | GIT_COLOR_RESET, |
8dbf3eb6 | 47 | GIT_COLOR_NORMAL, /* CONTEXT */ |
dc6ebd4c AL |
48 | GIT_COLOR_BOLD, /* METAINFO */ |
49 | GIT_COLOR_CYAN, /* FRAGINFO */ | |
50 | GIT_COLOR_RED, /* OLD */ | |
51 | GIT_COLOR_GREEN, /* NEW */ | |
52 | GIT_COLOR_YELLOW, /* COMMIT */ | |
53 | GIT_COLOR_BG_RED, /* WHITESPACE */ | |
89cb73a1 | 54 | GIT_COLOR_NORMAL, /* FUNCINFO */ |
cd112cef JS |
55 | }; |
56 | ||
9e1a5ebe | 57 | static int parse_diff_color_slot(const char *var) |
801235c5 | 58 | { |
74b15bfb | 59 | if (!strcasecmp(var, "context") || !strcasecmp(var, "plain")) |
8dbf3eb6 | 60 | return DIFF_CONTEXT; |
9e1a5ebe | 61 | if (!strcasecmp(var, "meta")) |
801235c5 | 62 | return DIFF_METAINFO; |
9e1a5ebe | 63 | if (!strcasecmp(var, "frag")) |
801235c5 | 64 | return DIFF_FRAGINFO; |
9e1a5ebe | 65 | if (!strcasecmp(var, "old")) |
801235c5 | 66 | return DIFF_FILE_OLD; |
9e1a5ebe | 67 | if (!strcasecmp(var, "new")) |
801235c5 | 68 | return DIFF_FILE_NEW; |
9e1a5ebe | 69 | if (!strcasecmp(var, "commit")) |
ce436973 | 70 | return DIFF_COMMIT; |
9e1a5ebe | 71 | if (!strcasecmp(var, "whitespace")) |
448c3ef1 | 72 | return DIFF_WHITESPACE; |
9e1a5ebe | 73 | if (!strcasecmp(var, "func")) |
89cb73a1 | 74 | return DIFF_FUNCINFO; |
8b8e8624 | 75 | return -1; |
801235c5 JH |
76 | } |
77 | ||
02e8ca0e | 78 | static int parse_dirstat_params(struct diff_options *options, const char *params_string, |
51670fc8 | 79 | struct strbuf *errmsg) |
333f3fb0 | 80 | { |
02e8ca0e MH |
81 | char *params_copy = xstrdup(params_string); |
82 | struct string_list params = STRING_LIST_INIT_NODUP; | |
83 | int ret = 0; | |
84 | int i; | |
51670fc8 | 85 | |
02e8ca0e MH |
86 | if (*params_copy) |
87 | string_list_split_in_place(¶ms, params_copy, ',', -1); | |
88 | for (i = 0; i < params.nr; i++) { | |
89 | const char *p = params.items[i].string; | |
90 | if (!strcmp(p, "changes")) { | |
1c57a627 JH |
91 | DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); |
92 | DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); | |
02e8ca0e | 93 | } else if (!strcmp(p, "lines")) { |
1c57a627 | 94 | DIFF_OPT_SET(options, DIRSTAT_BY_LINE); |
333f3fb0 | 95 | DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); |
02e8ca0e | 96 | } else if (!strcmp(p, "files")) { |
1c57a627 | 97 | DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); |
333f3fb0 | 98 | DIFF_OPT_SET(options, DIRSTAT_BY_FILE); |
02e8ca0e | 99 | } else if (!strcmp(p, "noncumulative")) { |
333f3fb0 | 100 | DIFF_OPT_CLR(options, DIRSTAT_CUMULATIVE); |
02e8ca0e | 101 | } else if (!strcmp(p, "cumulative")) { |
333f3fb0 JH |
102 | DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE); |
103 | } else if (isdigit(*p)) { | |
104 | char *end; | |
51670fc8 JH |
105 | int permille = strtoul(p, &end, 10) * 10; |
106 | if (*end == '.' && isdigit(*++end)) { | |
712d2c7d | 107 | /* only use first digit */ |
51670fc8 | 108 | permille += *end - '0'; |
712d2c7d | 109 | /* .. and ignore any further digits */ |
51670fc8 | 110 | while (isdigit(*++end)) |
712d2c7d JH |
111 | ; /* nothing */ |
112 | } | |
02e8ca0e | 113 | if (!*end) |
51670fc8 JH |
114 | options->dirstat_permille = permille; |
115 | else { | |
02e8ca0e MH |
116 | strbuf_addf(errmsg, _(" Failed to parse dirstat cut-off percentage '%s'\n"), |
117 | p); | |
51670fc8 JH |
118 | ret++; |
119 | } | |
120 | } else { | |
02e8ca0e | 121 | strbuf_addf(errmsg, _(" Unknown dirstat parameter '%s'\n"), p); |
51670fc8 | 122 | ret++; |
333f3fb0 | 123 | } |
51670fc8 | 124 | |
333f3fb0 | 125 | } |
02e8ca0e MH |
126 | string_list_clear(¶ms, 0); |
127 | free(params_copy); | |
51670fc8 | 128 | return ret; |
333f3fb0 JH |
129 | } |
130 | ||
c47ef57c RR |
131 | static int parse_submodule_params(struct diff_options *options, const char *value) |
132 | { | |
133 | if (!strcmp(value, "log")) | |
134 | DIFF_OPT_SET(options, SUBMODULE_LOG); | |
135 | else if (!strcmp(value, "short")) | |
136 | DIFF_OPT_CLR(options, SUBMODULE_LOG); | |
137 | else | |
138 | return -1; | |
139 | return 0; | |
140 | } | |
141 | ||
cced5fbc LT |
142 | static int git_config_rename(const char *var, const char *value) |
143 | { | |
144 | if (!value) | |
145 | return DIFF_DETECT_RENAME; | |
146 | if (!strcasecmp(value, "copies") || !strcasecmp(value, "copy")) | |
147 | return DIFF_DETECT_COPY; | |
148 | return git_config_bool(var,value) ? DIFF_DETECT_RENAME : 0; | |
149 | } | |
150 | ||
07924d4d | 151 | long parse_algorithm_value(const char *value) |
07ab4dec MP |
152 | { |
153 | if (!value) | |
154 | return -1; | |
155 | else if (!strcasecmp(value, "myers") || !strcasecmp(value, "default")) | |
156 | return 0; | |
157 | else if (!strcasecmp(value, "minimal")) | |
158 | return XDF_NEED_MINIMAL; | |
159 | else if (!strcasecmp(value, "patience")) | |
160 | return XDF_PATIENCE_DIFF; | |
161 | else if (!strcasecmp(value, "histogram")) | |
162 | return XDF_HISTOGRAM_DIFF; | |
163 | return -1; | |
164 | } | |
165 | ||
83ad63cf JH |
166 | /* |
167 | * These are to give UI layer defaults. | |
168 | * The core-level commands such as git-diff-files should | |
169 | * never be affected by the setting of diff.renames | |
170 | * the user happens to have in the configuration file. | |
171 | */ | |
5404c116 MM |
172 | void init_diff_ui_defaults(void) |
173 | { | |
174 | diff_detect_rename_default = 1; | |
175 | } | |
176 | ||
ef90d6d4 | 177 | int git_diff_ui_config(const char *var, const char *value, void *cb) |
801235c5 | 178 | { |
a159ca0c | 179 | if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) { |
e269eb79 | 180 | diff_use_color_default = git_config_colorbool(var, value); |
801235c5 JH |
181 | return 0; |
182 | } | |
6468a4e5 JM |
183 | if (!strcmp(var, "diff.context")) { |
184 | diff_context_default = git_config_int(var, value); | |
185 | if (diff_context_default < 0) | |
186 | return -1; | |
187 | return 0; | |
188 | } | |
b68ea12e | 189 | if (!strcmp(var, "diff.renames")) { |
cced5fbc | 190 | diff_detect_rename_default = git_config_rename(var, value); |
b68ea12e EW |
191 | return 0; |
192 | } | |
d634d61e SB |
193 | if (!strcmp(var, "diff.compactionheuristic")) { |
194 | diff_compaction_heuristic = git_config_bool(var, value); | |
195 | return 0; | |
196 | } | |
aecbf914 JH |
197 | if (!strcmp(var, "diff.autorefreshindex")) { |
198 | diff_auto_refresh_index = git_config_bool(var, value); | |
199 | return 0; | |
200 | } | |
a5a818ee JH |
201 | if (!strcmp(var, "diff.mnemonicprefix")) { |
202 | diff_mnemonic_prefix = git_config_bool(var, value); | |
203 | return 0; | |
204 | } | |
f89504dd EC |
205 | if (!strcmp(var, "diff.noprefix")) { |
206 | diff_no_prefix = git_config_bool(var, value); | |
207 | return 0; | |
208 | } | |
df44483a ZJS |
209 | if (!strcmp(var, "diff.statgraphwidth")) { |
210 | diff_stat_graph_width = git_config_int(var, value); | |
211 | return 0; | |
212 | } | |
daec808c BH |
213 | if (!strcmp(var, "diff.external")) |
214 | return git_config_string(&external_diff_cmd_cfg, var, value); | |
98a4d87b BSSJ |
215 | if (!strcmp(var, "diff.wordregex")) |
216 | return git_config_string(&diff_word_regex_cfg, var, value); | |
6d8940b5 SB |
217 | if (!strcmp(var, "diff.orderfile")) |
218 | return git_config_pathname(&diff_order_file_cfg, var, value); | |
f1af60bd | 219 | |
be4f2b40 JS |
220 | if (!strcmp(var, "diff.ignoresubmodules")) |
221 | handle_ignore_submodules_arg(&default_diff_options, value); | |
222 | ||
c47ef57c RR |
223 | if (!strcmp(var, "diff.submodule")) { |
224 | if (parse_submodule_params(&default_diff_options, value)) | |
225 | warning(_("Unknown value for 'diff.submodule' config variable: '%s'"), | |
226 | value); | |
227 | return 0; | |
228 | } | |
229 | ||
07ab4dec MP |
230 | if (!strcmp(var, "diff.algorithm")) { |
231 | diff_algorithm = parse_algorithm_value(value); | |
232 | if (diff_algorithm < 0) | |
233 | return -1; | |
234 | return 0; | |
235 | } | |
236 | ||
3e1dd17a JK |
237 | if (git_color_config(var, value, cb) < 0) |
238 | return -1; | |
239 | ||
ef90d6d4 | 240 | return git_diff_basic_config(var, value, cb); |
9a1805a8 JK |
241 | } |
242 | ||
ef90d6d4 | 243 | int git_diff_basic_config(const char *var, const char *value, void *cb) |
9a1805a8 | 244 | { |
ae021d87 JK |
245 | const char *name; |
246 | ||
2b6ca6df LT |
247 | if (!strcmp(var, "diff.renamelimit")) { |
248 | diff_rename_limit_default = git_config_int(var, value); | |
249 | return 0; | |
250 | } | |
251 | ||
6680a087 JK |
252 | if (userdiff_config(var, value) < 0) |
253 | return -1; | |
c7534ef4 | 254 | |
ae021d87 JK |
255 | if (skip_prefix(var, "diff.color.", &name) || |
256 | skip_prefix(var, "color.diff.", &name)) { | |
257 | int slot = parse_diff_color_slot(name); | |
8b8e8624 JK |
258 | if (slot < 0) |
259 | return 0; | |
64f30e94 JH |
260 | if (!value) |
261 | return config_error_nonbool(var); | |
f6c5a296 | 262 | return color_parse(value, diff_colors[slot]); |
801235c5 | 263 | } |
f1af60bd | 264 | |
a624eaa7 | 265 | /* like GNU diff's --suppress-blank-empty option */ |
950db879 JS |
266 | if (!strcmp(var, "diff.suppressblankempty") || |
267 | /* for backwards compatibility */ | |
268 | !strcmp(var, "diff.suppress-blank-empty")) { | |
a624eaa7 JM |
269 | diff_suppress_blank_empty = git_config_bool(var, value); |
270 | return 0; | |
271 | } | |
272 | ||
2d174951 | 273 | if (!strcmp(var, "diff.dirstat")) { |
51670fc8 | 274 | struct strbuf errmsg = STRBUF_INIT; |
712d2c7d | 275 | default_diff_options.dirstat_permille = diff_dirstat_permille_default; |
51670fc8 | 276 | if (parse_dirstat_params(&default_diff_options, value, &errmsg)) |
7478ac57 | 277 | warning(_("Found errors in 'diff.dirstat' config variable:\n%s"), |
51670fc8 JH |
278 | errmsg.buf); |
279 | strbuf_release(&errmsg); | |
712d2c7d | 280 | diff_dirstat_permille_default = default_diff_options.dirstat_permille; |
2d174951 JH |
281 | return 0; |
282 | } | |
283 | ||
59556548 | 284 | if (starts_with(var, "submodule.")) |
aee9c7d6 JL |
285 | return parse_submodule_config_option(var, value); |
286 | ||
3e1dd17a | 287 | return git_default_config(var, value, cb); |
801235c5 JH |
288 | } |
289 | ||
6973dcae JH |
290 | static char *quote_two(const char *one, const char *two) |
291 | { | |
292 | int need_one = quote_c_style(one, NULL, NULL, 1); | |
293 | int need_two = quote_c_style(two, NULL, NULL, 1); | |
f285a2d7 | 294 | struct strbuf res = STRBUF_INIT; |
6973dcae JH |
295 | |
296 | if (need_one + need_two) { | |
663af342 PH |
297 | strbuf_addch(&res, '"'); |
298 | quote_c_style(one, &res, NULL, 1); | |
299 | quote_c_style(two, &res, NULL, 1); | |
300 | strbuf_addch(&res, '"'); | |
301 | } else { | |
302 | strbuf_addstr(&res, one); | |
303 | strbuf_addstr(&res, two); | |
6973dcae | 304 | } |
b315c5c0 | 305 | return strbuf_detach(&res, NULL); |
6973dcae JH |
306 | } |
307 | ||
308 | static const char *external_diff(void) | |
309 | { | |
310 | static const char *external_diff_cmd = NULL; | |
311 | static int done_preparing = 0; | |
312 | ||
313 | if (done_preparing) | |
314 | return external_diff_cmd; | |
315 | external_diff_cmd = getenv("GIT_EXTERNAL_DIFF"); | |
cbe02100 JS |
316 | if (!external_diff_cmd) |
317 | external_diff_cmd = external_diff_cmd_cfg; | |
6973dcae JH |
318 | done_preparing = 1; |
319 | return external_diff_cmd; | |
320 | } | |
321 | ||
284098f1 MH |
322 | /* |
323 | * Keep track of files used for diffing. Sometimes such an entry | |
324 | * refers to a temporary file, sometimes to an existing file, and | |
325 | * sometimes to "/dev/null". | |
326 | */ | |
6973dcae | 327 | static struct diff_tempfile { |
284098f1 MH |
328 | /* |
329 | * filename external diff should read from, or NULL if this | |
330 | * entry is currently not in use: | |
331 | */ | |
332 | const char *name; | |
333 | ||
d59f765a | 334 | char hex[GIT_SHA1_HEXSZ + 1]; |
6973dcae | 335 | char mode[10]; |
284098f1 MH |
336 | |
337 | /* | |
338 | * If this diff_tempfile instance refers to a temporary file, | |
339 | * this tempfile object is used to manage its lifetime. | |
340 | */ | |
341 | struct tempfile tempfile; | |
6973dcae JH |
342 | } diff_temp[2]; |
343 | ||
6957eb9a JH |
344 | typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len); |
345 | ||
346 | struct emit_callback { | |
6957eb9a JH |
347 | int color_diff; |
348 | unsigned ws_rule; | |
349 | int blank_at_eof_in_preimage; | |
350 | int blank_at_eof_in_postimage; | |
351 | int lno_in_preimage; | |
352 | int lno_in_postimage; | |
353 | sane_truncate_fn truncate; | |
354 | const char **label_path; | |
355 | struct diff_words_data *diff_words; | |
a3c158d4 | 356 | struct diff_options *opt; |
3e97c7c6 | 357 | struct strbuf *header; |
6957eb9a JH |
358 | }; |
359 | ||
6973dcae JH |
360 | static int count_lines(const char *data, int size) |
361 | { | |
362 | int count, ch, completely_empty = 1, nl_just_seen = 0; | |
363 | count = 0; | |
364 | while (0 < size--) { | |
365 | ch = *data++; | |
366 | if (ch == '\n') { | |
367 | count++; | |
368 | nl_just_seen = 1; | |
369 | completely_empty = 0; | |
370 | } | |
371 | else { | |
372 | nl_just_seen = 0; | |
373 | completely_empty = 0; | |
374 | } | |
375 | } | |
376 | if (completely_empty) | |
377 | return 0; | |
378 | if (!nl_just_seen) | |
379 | count++; /* no trailing newline */ | |
380 | return count; | |
381 | } | |
382 | ||
6957eb9a JH |
383 | static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) |
384 | { | |
385 | if (!DIFF_FILE_VALID(one)) { | |
386 | mf->ptr = (char *)""; /* does not matter */ | |
387 | mf->size = 0; | |
388 | return 0; | |
389 | } | |
390 | else if (diff_populate_filespec(one, 0)) | |
391 | return -1; | |
bb35fefb | 392 | |
6957eb9a JH |
393 | mf->ptr = one->data; |
394 | mf->size = one->size; | |
395 | return 0; | |
396 | } | |
397 | ||
abb371a1 JK |
398 | /* like fill_mmfile, but only for size, so we can avoid retrieving blob */ |
399 | static unsigned long diff_filespec_size(struct diff_filespec *one) | |
400 | { | |
401 | if (!DIFF_FILE_VALID(one)) | |
402 | return 0; | |
8e5dd3d6 | 403 | diff_populate_filespec(one, CHECK_SIZE_ONLY); |
abb371a1 JK |
404 | return one->size; |
405 | } | |
406 | ||
6957eb9a JH |
407 | static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule) |
408 | { | |
409 | char *ptr = mf->ptr; | |
410 | long size = mf->size; | |
411 | int cnt = 0; | |
412 | ||
413 | if (!size) | |
414 | return cnt; | |
415 | ptr += size - 1; /* pointing at the very end */ | |
416 | if (*ptr != '\n') | |
417 | ; /* incomplete line */ | |
418 | else | |
419 | ptr--; /* skip the last LF */ | |
420 | while (mf->ptr < ptr) { | |
421 | char *prev_eol; | |
422 | for (prev_eol = ptr; mf->ptr <= prev_eol; prev_eol--) | |
423 | if (*prev_eol == '\n') | |
424 | break; | |
425 | if (!ws_blank_line(prev_eol + 1, ptr - prev_eol, ws_rule)) | |
426 | break; | |
427 | cnt++; | |
428 | ptr = prev_eol - 1; | |
429 | } | |
430 | return cnt; | |
431 | } | |
432 | ||
433 | static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2, | |
434 | struct emit_callback *ecbdata) | |
435 | { | |
436 | int l1, l2, at; | |
437 | unsigned ws_rule = ecbdata->ws_rule; | |
438 | l1 = count_trailing_blank(mf1, ws_rule); | |
439 | l2 = count_trailing_blank(mf2, ws_rule); | |
440 | if (l2 <= l1) { | |
441 | ecbdata->blank_at_eof_in_preimage = 0; | |
442 | ecbdata->blank_at_eof_in_postimage = 0; | |
443 | return; | |
444 | } | |
445 | at = count_lines(mf1->ptr, mf1->size); | |
446 | ecbdata->blank_at_eof_in_preimage = (at - l1) + 1; | |
447 | ||
448 | at = count_lines(mf2->ptr, mf2->size); | |
449 | ecbdata->blank_at_eof_in_postimage = (at - l2) + 1; | |
450 | } | |
451 | ||
a3c158d4 | 452 | static void emit_line_0(struct diff_options *o, const char *set, const char *reset, |
250f7993 | 453 | int first, const char *line, int len) |
6957eb9a JH |
454 | { |
455 | int has_trailing_newline, has_trailing_carriage_return; | |
250f7993 | 456 | int nofirst; |
a3c158d4 BY |
457 | FILE *file = o->file; |
458 | ||
30997bb8 | 459 | fputs(diff_line_prefix(o), file); |
6957eb9a | 460 | |
250f7993 JH |
461 | if (len == 0) { |
462 | has_trailing_newline = (first == '\n'); | |
463 | has_trailing_carriage_return = (!has_trailing_newline && | |
464 | (first == '\r')); | |
465 | nofirst = has_trailing_newline || has_trailing_carriage_return; | |
466 | } else { | |
467 | has_trailing_newline = (len > 0 && line[len-1] == '\n'); | |
468 | if (has_trailing_newline) | |
469 | len--; | |
470 | has_trailing_carriage_return = (len > 0 && line[len-1] == '\r'); | |
471 | if (has_trailing_carriage_return) | |
472 | len--; | |
473 | nofirst = 0; | |
474 | } | |
6957eb9a | 475 | |
06a47552 JH |
476 | if (len || !nofirst) { |
477 | fputs(set, file); | |
478 | if (!nofirst) | |
479 | fputc(first, file); | |
480 | fwrite(line, len, 1, file); | |
481 | fputs(reset, file); | |
482 | } | |
6957eb9a JH |
483 | if (has_trailing_carriage_return) |
484 | fputc('\r', file); | |
485 | if (has_trailing_newline) | |
486 | fputc('\n', file); | |
487 | } | |
488 | ||
a3c158d4 | 489 | static void emit_line(struct diff_options *o, const char *set, const char *reset, |
250f7993 JH |
490 | const char *line, int len) |
491 | { | |
a3c158d4 | 492 | emit_line_0(o, set, reset, line[0], line+1, len-1); |
250f7993 JH |
493 | } |
494 | ||
6957eb9a JH |
495 | static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len) |
496 | { | |
497 | if (!((ecbdata->ws_rule & WS_BLANK_AT_EOF) && | |
498 | ecbdata->blank_at_eof_in_preimage && | |
499 | ecbdata->blank_at_eof_in_postimage && | |
500 | ecbdata->blank_at_eof_in_preimage <= ecbdata->lno_in_preimage && | |
501 | ecbdata->blank_at_eof_in_postimage <= ecbdata->lno_in_postimage)) | |
502 | return 0; | |
018cff70 | 503 | return ws_blank_line(line, len, ecbdata->ws_rule); |
6957eb9a JH |
504 | } |
505 | ||
b8767f79 JH |
506 | static void emit_line_checked(const char *reset, |
507 | struct emit_callback *ecbdata, | |
508 | const char *line, int len, | |
509 | enum color_diff color, | |
510 | unsigned ws_error_highlight, | |
511 | char sign) | |
6957eb9a | 512 | { |
b8767f79 JH |
513 | const char *set = diff_get_color(ecbdata->color_diff, color); |
514 | const char *ws = NULL; | |
6957eb9a | 515 | |
b8767f79 JH |
516 | if (ecbdata->opt->ws_error_highlight & ws_error_highlight) { |
517 | ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE); | |
518 | if (!*ws) | |
519 | ws = NULL; | |
520 | } | |
521 | ||
522 | if (!ws) | |
523 | emit_line_0(ecbdata->opt, set, reset, sign, line, len); | |
524 | else if (sign == '+' && new_blank_line_at_eof(ecbdata, line, len)) | |
6957eb9a | 525 | /* Blank line at EOF - paint '+' as well */ |
b8767f79 | 526 | emit_line_0(ecbdata->opt, ws, reset, sign, line, len); |
6957eb9a JH |
527 | else { |
528 | /* Emit just the prefix, then the rest. */ | |
b8767f79 | 529 | emit_line_0(ecbdata->opt, set, reset, sign, "", 0); |
018cff70 | 530 | ws_check_emit(line, len, ecbdata->ws_rule, |
a3c158d4 | 531 | ecbdata->opt->file, set, reset, ws); |
6957eb9a JH |
532 | } |
533 | } | |
534 | ||
b8767f79 | 535 | static void emit_add_line(const char *reset, |
0e383e18 JH |
536 | struct emit_callback *ecbdata, |
537 | const char *line, int len) | |
538 | { | |
b8767f79 JH |
539 | emit_line_checked(reset, ecbdata, line, len, |
540 | DIFF_FILE_NEW, WSEH_NEW, '+'); | |
541 | } | |
0e383e18 | 542 | |
b8767f79 JH |
543 | static void emit_del_line(const char *reset, |
544 | struct emit_callback *ecbdata, | |
545 | const char *line, int len) | |
546 | { | |
547 | emit_line_checked(reset, ecbdata, line, len, | |
548 | DIFF_FILE_OLD, WSEH_OLD, '-'); | |
0e383e18 JH |
549 | } |
550 | ||
551 | static void emit_context_line(const char *reset, | |
552 | struct emit_callback *ecbdata, | |
553 | const char *line, int len) | |
554 | { | |
b8767f79 | 555 | emit_line_checked(reset, ecbdata, line, len, |
db65170e | 556 | DIFF_CONTEXT, WSEH_CONTEXT, ' '); |
0e383e18 JH |
557 | } |
558 | ||
89cb73a1 BW |
559 | static void emit_hunk_header(struct emit_callback *ecbdata, |
560 | const char *line, int len) | |
561 | { | |
8dbf3eb6 | 562 | const char *context = diff_get_color(ecbdata->color_diff, DIFF_CONTEXT); |
89cb73a1 BW |
563 | const char *frag = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO); |
564 | const char *func = diff_get_color(ecbdata->color_diff, DIFF_FUNCINFO); | |
565 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); | |
566 | static const char atat[2] = { '@', '@' }; | |
567 | const char *cp, *ep; | |
2efcc977 BY |
568 | struct strbuf msgbuf = STRBUF_INIT; |
569 | int org_len = len; | |
570 | int i = 1; | |
89cb73a1 BW |
571 | |
572 | /* | |
573 | * As a hunk header must begin with "@@ -<old>, +<new> @@", | |
574 | * it always is at least 10 bytes long. | |
575 | */ | |
576 | if (len < 10 || | |
577 | memcmp(line, atat, 2) || | |
578 | !(ep = memmem(line + 2, len - 2, atat, 2))) { | |
8dbf3eb6 | 579 | emit_line(ecbdata->opt, context, reset, line, len); |
89cb73a1 BW |
580 | return; |
581 | } | |
582 | ep += 2; /* skip over @@ */ | |
583 | ||
584 | /* The hunk header in fraginfo color */ | |
cedc61a9 | 585 | strbuf_addstr(&msgbuf, frag); |
2efcc977 | 586 | strbuf_add(&msgbuf, line, ep - line); |
cedc61a9 | 587 | strbuf_addstr(&msgbuf, reset); |
2efcc977 BY |
588 | |
589 | /* | |
590 | * trailing "\r\n" | |
591 | */ | |
592 | for ( ; i < 3; i++) | |
593 | if (line[len - i] == '\r' || line[len - i] == '\n') | |
594 | len--; | |
89cb73a1 BW |
595 | |
596 | /* blank before the func header */ | |
597 | for (cp = ep; ep - line < len; ep++) | |
598 | if (*ep != ' ' && *ep != '\t') | |
599 | break; | |
2efcc977 | 600 | if (ep != cp) { |
8dbf3eb6 | 601 | strbuf_addstr(&msgbuf, context); |
2efcc977 | 602 | strbuf_add(&msgbuf, cp, ep - cp); |
cedc61a9 | 603 | strbuf_addstr(&msgbuf, reset); |
2efcc977 BY |
604 | } |
605 | ||
606 | if (ep < line + len) { | |
cedc61a9 | 607 | strbuf_addstr(&msgbuf, func); |
2efcc977 | 608 | strbuf_add(&msgbuf, ep, line + len - ep); |
cedc61a9 | 609 | strbuf_addstr(&msgbuf, reset); |
2efcc977 | 610 | } |
89cb73a1 | 611 | |
2efcc977 BY |
612 | strbuf_add(&msgbuf, line + len, org_len - len); |
613 | emit_line(ecbdata->opt, "", "", msgbuf.buf, msgbuf.len); | |
614 | strbuf_release(&msgbuf); | |
89cb73a1 BW |
615 | } |
616 | ||
479b0ae8 JK |
617 | static struct diff_tempfile *claim_diff_tempfile(void) { |
618 | int i; | |
619 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) | |
620 | if (!diff_temp[i].name) | |
621 | return diff_temp + i; | |
622 | die("BUG: diff is failing to clean up its tempfiles"); | |
623 | } | |
624 | ||
479b0ae8 JK |
625 | static void remove_tempfile(void) |
626 | { | |
627 | int i; | |
a8344abe | 628 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) { |
284098f1 MH |
629 | if (is_tempfile_active(&diff_temp[i].tempfile)) |
630 | delete_tempfile(&diff_temp[i].tempfile); | |
a8344abe NR |
631 | diff_temp[i].name = NULL; |
632 | } | |
479b0ae8 JK |
633 | } |
634 | ||
c0c77734 | 635 | static void print_line_count(FILE *file, int count) |
6973dcae JH |
636 | { |
637 | switch (count) { | |
638 | case 0: | |
c0c77734 | 639 | fprintf(file, "0,0"); |
6973dcae JH |
640 | break; |
641 | case 1: | |
c0c77734 | 642 | fprintf(file, "1"); |
6973dcae JH |
643 | break; |
644 | default: | |
c0c77734 | 645 | fprintf(file, "1,%d", count); |
6973dcae JH |
646 | break; |
647 | } | |
648 | } | |
649 | ||
7f7ee2ff JH |
650 | static void emit_rewrite_lines(struct emit_callback *ecb, |
651 | int prefix, const char *data, int size) | |
6973dcae | 652 | { |
7f7ee2ff JH |
653 | const char *endp = NULL; |
654 | static const char *nneof = " No newline at end of file\n"; | |
7f7ee2ff JH |
655 | const char *reset = diff_get_color(ecb->color_diff, DIFF_RESET); |
656 | ||
657 | while (0 < size) { | |
658 | int len; | |
659 | ||
660 | endp = memchr(data, '\n', size); | |
661 | len = endp ? (endp - data + 1) : size; | |
662 | if (prefix != '+') { | |
663 | ecb->lno_in_preimage++; | |
0e383e18 | 664 | emit_del_line(reset, ecb, data, len); |
7f7ee2ff JH |
665 | } else { |
666 | ecb->lno_in_postimage++; | |
667 | emit_add_line(reset, ecb, data, len); | |
13e36ec5 | 668 | } |
7f7ee2ff JH |
669 | size -= len; |
670 | data += len; | |
671 | } | |
672 | if (!endp) { | |
8dbf3eb6 JK |
673 | const char *context = diff_get_color(ecb->color_diff, |
674 | DIFF_CONTEXT); | |
35e2d03c | 675 | putc('\n', ecb->opt->file); |
8dbf3eb6 | 676 | emit_line_0(ecb->opt, context, reset, '\\', |
7f7ee2ff | 677 | nneof, strlen(nneof)); |
6973dcae | 678 | } |
6973dcae JH |
679 | } |
680 | ||
681 | static void emit_rewrite_diff(const char *name_a, | |
682 | const char *name_b, | |
683 | struct diff_filespec *one, | |
13e36ec5 | 684 | struct diff_filespec *two, |
d9bae1a1 JK |
685 | struct userdiff_driver *textconv_one, |
686 | struct userdiff_driver *textconv_two, | |
eab9a40b | 687 | struct diff_options *o) |
6973dcae JH |
688 | { |
689 | int lc_a, lc_b; | |
1a9eb3b9 | 690 | const char *name_a_tab, *name_b_tab; |
f1c96261 JK |
691 | const char *metainfo = diff_get_color(o->use_color, DIFF_METAINFO); |
692 | const char *fraginfo = diff_get_color(o->use_color, DIFF_FRAGINFO); | |
693 | const char *reset = diff_get_color(o->use_color, DIFF_RESET); | |
d5625091 | 694 | static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT; |
a5a818ee | 695 | const char *a_prefix, *b_prefix; |
840383b2 | 696 | char *data_one, *data_two; |
3aa1f7ca | 697 | size_t size_one, size_two; |
7f7ee2ff | 698 | struct emit_callback ecbdata; |
30997bb8 | 699 | const char *line_prefix = diff_line_prefix(o); |
a5a818ee JH |
700 | |
701 | if (diff_mnemonic_prefix && DIFF_OPT_TST(o, REVERSE_DIFF)) { | |
702 | a_prefix = o->b_prefix; | |
703 | b_prefix = o->a_prefix; | |
704 | } else { | |
705 | a_prefix = o->a_prefix; | |
706 | b_prefix = o->b_prefix; | |
707 | } | |
1a9eb3b9 | 708 | |
8a13becc JH |
709 | name_a += (*name_a == '/'); |
710 | name_b += (*name_b == '/'); | |
1a9eb3b9 JH |
711 | name_a_tab = strchr(name_a, ' ') ? "\t" : ""; |
712 | name_b_tab = strchr(name_b, ' ') ? "\t" : ""; | |
713 | ||
d5625091 JH |
714 | strbuf_reset(&a_name); |
715 | strbuf_reset(&b_name); | |
a5a818ee JH |
716 | quote_two_c_style(&a_name, a_prefix, name_a, 0); |
717 | quote_two_c_style(&b_name, b_prefix, name_b, 0); | |
d5625091 | 718 | |
840383b2 JK |
719 | size_one = fill_textconv(textconv_one, one, &data_one); |
720 | size_two = fill_textconv(textconv_two, two, &data_two); | |
3aa1f7ca | 721 | |
d91ba8fa | 722 | memset(&ecbdata, 0, sizeof(ecbdata)); |
daa0c3d9 | 723 | ecbdata.color_diff = want_color(o->use_color); |
c189c4f2 | 724 | ecbdata.ws_rule = whitespace_rule(name_b); |
a3c158d4 | 725 | ecbdata.opt = o; |
d91ba8fa JH |
726 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) { |
727 | mmfile_t mf1, mf2; | |
728 | mf1.ptr = (char *)data_one; | |
729 | mf2.ptr = (char *)data_two; | |
730 | mf1.size = size_one; | |
731 | mf2.size = size_two; | |
732 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
733 | } | |
734 | ecbdata.lno_in_preimage = 1; | |
735 | ecbdata.lno_in_postimage = 1; | |
736 | ||
3aa1f7ca JK |
737 | lc_a = count_lines(data_one, size_one); |
738 | lc_b = count_lines(data_two, size_two); | |
c0c77734 | 739 | fprintf(o->file, |
7be57610 BY |
740 | "%s%s--- %s%s%s\n%s%s+++ %s%s%s\n%s%s@@ -", |
741 | line_prefix, metainfo, a_name.buf, name_a_tab, reset, | |
742 | line_prefix, metainfo, b_name.buf, name_b_tab, reset, | |
743 | line_prefix, fraginfo); | |
467ddc14 JH |
744 | if (!o->irreversible_delete) |
745 | print_line_count(o->file, lc_a); | |
746 | else | |
747 | fprintf(o->file, "?,?"); | |
c0c77734 DB |
748 | fprintf(o->file, " +"); |
749 | print_line_count(o->file, lc_b); | |
750 | fprintf(o->file, " @@%s\n", reset); | |
467ddc14 | 751 | if (lc_a && !o->irreversible_delete) |
d91ba8fa | 752 | emit_rewrite_lines(&ecbdata, '-', data_one, size_one); |
6973dcae | 753 | if (lc_b) |
d91ba8fa | 754 | emit_rewrite_lines(&ecbdata, '+', data_two, size_two); |
b76c056b | 755 | if (textconv_one) |
aed6ca52 | 756 | free((char *)data_one); |
b76c056b | 757 | if (textconv_two) |
aed6ca52 | 758 | free((char *)data_two); |
6973dcae JH |
759 | } |
760 | ||
f59a59e2 JS |
761 | struct diff_words_buffer { |
762 | mmfile_t text; | |
763 | long alloc; | |
2e5d2003 JS |
764 | struct diff_words_orig { |
765 | const char *begin, *end; | |
766 | } *orig; | |
767 | int orig_nr, orig_alloc; | |
f59a59e2 JS |
768 | }; |
769 | ||
770 | static void diff_words_append(char *line, unsigned long len, | |
771 | struct diff_words_buffer *buffer) | |
772 | { | |
23c1575f | 773 | ALLOC_GROW(buffer->text.ptr, buffer->text.size + len, buffer->alloc); |
f59a59e2 JS |
774 | line++; |
775 | len--; | |
776 | memcpy(buffer->text.ptr + buffer->text.size, line, len); | |
777 | buffer->text.size += len; | |
2b6a5417 | 778 | buffer->text.ptr[buffer->text.size] = '\0'; |
f59a59e2 JS |
779 | } |
780 | ||
9cba13ca | 781 | struct diff_words_style_elem { |
882749a0 TR |
782 | const char *prefix; |
783 | const char *suffix; | |
784 | const char *color; /* NULL; filled in by the setup code if | |
785 | * color is enabled */ | |
786 | }; | |
787 | ||
9cba13ca | 788 | struct diff_words_style { |
882749a0 TR |
789 | enum diff_words_type type; |
790 | struct diff_words_style_elem new, old, ctx; | |
791 | const char *newline; | |
792 | }; | |
793 | ||
c2e86add | 794 | static struct diff_words_style diff_words_styles[] = { |
882749a0 TR |
795 | { DIFF_WORDS_PORCELAIN, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" }, |
796 | { DIFF_WORDS_PLAIN, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" }, | |
797 | { DIFF_WORDS_COLOR, {"", ""}, {"", ""}, {"", ""}, "\n" } | |
798 | }; | |
799 | ||
f59a59e2 | 800 | struct diff_words_data { |
f59a59e2 | 801 | struct diff_words_buffer minus, plus; |
2e5d2003 | 802 | const char *current_plus; |
4297c0ae BY |
803 | int last_minus; |
804 | struct diff_options *opt; | |
2b6a5417 | 805 | regex_t *word_regex; |
882749a0 TR |
806 | enum diff_words_type type; |
807 | struct diff_words_style *style; | |
f59a59e2 JS |
808 | }; |
809 | ||
882749a0 TR |
810 | static int fn_out_diff_words_write_helper(FILE *fp, |
811 | struct diff_words_style_elem *st_el, | |
812 | const char *newline, | |
4297c0ae BY |
813 | size_t count, const char *buf, |
814 | const char *line_prefix) | |
882749a0 | 815 | { |
4297c0ae BY |
816 | int print = 0; |
817 | ||
882749a0 TR |
818 | while (count) { |
819 | char *p = memchr(buf, '\n', count); | |
4297c0ae BY |
820 | if (print) |
821 | fputs(line_prefix, fp); | |
882749a0 TR |
822 | if (p != buf) { |
823 | if (st_el->color && fputs(st_el->color, fp) < 0) | |
824 | return -1; | |
825 | if (fputs(st_el->prefix, fp) < 0 || | |
826 | fwrite(buf, p ? p - buf : count, 1, fp) != 1 || | |
827 | fputs(st_el->suffix, fp) < 0) | |
828 | return -1; | |
829 | if (st_el->color && *st_el->color | |
830 | && fputs(GIT_COLOR_RESET, fp) < 0) | |
831 | return -1; | |
832 | } | |
833 | if (!p) | |
834 | return 0; | |
835 | if (fputs(newline, fp) < 0) | |
836 | return -1; | |
837 | count -= p + 1 - buf; | |
838 | buf = p + 1; | |
4297c0ae | 839 | print = 1; |
882749a0 TR |
840 | } |
841 | return 0; | |
842 | } | |
843 | ||
4297c0ae BY |
844 | /* |
845 | * '--color-words' algorithm can be described as: | |
846 | * | |
847 | * 1. collect a the minus/plus lines of a diff hunk, divided into | |
848 | * minus-lines and plus-lines; | |
849 | * | |
850 | * 2. break both minus-lines and plus-lines into words and | |
851 | * place them into two mmfile_t with one word for each line; | |
852 | * | |
853 | * 3. use xdiff to run diff on the two mmfile_t to get the words level diff; | |
854 | * | |
855 | * And for the common parts of the both file, we output the plus side text. | |
856 | * diff_words->current_plus is used to trace the current position of the plus file | |
857 | * which printed. diff_words->last_minus is used to trace the last minus word | |
858 | * printed. | |
859 | * | |
860 | * For '--graph' to work with '--color-words', we need to output the graph prefix | |
861 | * on each line of color words output. Generally, there are two conditions on | |
862 | * which we should output the prefix. | |
863 | * | |
864 | * 1. diff_words->last_minus == 0 && | |
865 | * diff_words->current_plus == diff_words->plus.text.ptr | |
866 | * | |
867 | * that is: the plus text must start as a new line, and if there is no minus | |
868 | * word printed, a graph prefix must be printed. | |
869 | * | |
870 | * 2. diff_words->current_plus > diff_words->plus.text.ptr && | |
871 | * *(diff_words->current_plus - 1) == '\n' | |
872 | * | |
873 | * that is: a graph prefix must be printed following a '\n' | |
874 | */ | |
875 | static int color_words_output_graph_prefix(struct diff_words_data *diff_words) | |
876 | { | |
877 | if ((diff_words->last_minus == 0 && | |
878 | diff_words->current_plus == diff_words->plus.text.ptr) || | |
879 | (diff_words->current_plus > diff_words->plus.text.ptr && | |
880 | *(diff_words->current_plus - 1) == '\n')) { | |
881 | return 1; | |
882 | } else { | |
883 | return 0; | |
884 | } | |
885 | } | |
886 | ||
f59a59e2 | 887 | static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) |
f59a59e2 | 888 | { |
f59a59e2 | 889 | struct diff_words_data *diff_words = priv; |
882749a0 | 890 | struct diff_words_style *style = diff_words->style; |
2e5d2003 JS |
891 | int minus_first, minus_len, plus_first, plus_len; |
892 | const char *minus_begin, *minus_end, *plus_begin, *plus_end; | |
4297c0ae | 893 | struct diff_options *opt = diff_words->opt; |
30997bb8 | 894 | const char *line_prefix; |
f59a59e2 | 895 | |
2e5d2003 JS |
896 | if (line[0] != '@' || parse_hunk_header(line, len, |
897 | &minus_first, &minus_len, &plus_first, &plus_len)) | |
f59a59e2 JS |
898 | return; |
899 | ||
4297c0ae | 900 | assert(opt); |
30997bb8 | 901 | line_prefix = diff_line_prefix(opt); |
4297c0ae | 902 | |
2e5d2003 JS |
903 | /* POSIX requires that first be decremented by one if len == 0... */ |
904 | if (minus_len) { | |
905 | minus_begin = diff_words->minus.orig[minus_first].begin; | |
906 | minus_end = | |
907 | diff_words->minus.orig[minus_first + minus_len - 1].end; | |
908 | } else | |
909 | minus_begin = minus_end = | |
910 | diff_words->minus.orig[minus_first].end; | |
911 | ||
912 | if (plus_len) { | |
913 | plus_begin = diff_words->plus.orig[plus_first].begin; | |
914 | plus_end = diff_words->plus.orig[plus_first + plus_len - 1].end; | |
915 | } else | |
916 | plus_begin = plus_end = diff_words->plus.orig[plus_first].end; | |
917 | ||
4297c0ae BY |
918 | if (color_words_output_graph_prefix(diff_words)) { |
919 | fputs(line_prefix, diff_words->opt->file); | |
920 | } | |
921 | if (diff_words->current_plus != plus_begin) { | |
922 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 TR |
923 | &style->ctx, style->newline, |
924 | plus_begin - diff_words->current_plus, | |
4297c0ae BY |
925 | diff_words->current_plus, line_prefix); |
926 | if (*(plus_begin - 1) == '\n') | |
927 | fputs(line_prefix, diff_words->opt->file); | |
928 | } | |
929 | if (minus_begin != minus_end) { | |
930 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 931 | &style->old, style->newline, |
4297c0ae BY |
932 | minus_end - minus_begin, minus_begin, |
933 | line_prefix); | |
934 | } | |
935 | if (plus_begin != plus_end) { | |
936 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 937 | &style->new, style->newline, |
4297c0ae BY |
938 | plus_end - plus_begin, plus_begin, |
939 | line_prefix); | |
940 | } | |
2e5d2003 JS |
941 | |
942 | diff_words->current_plus = plus_end; | |
4297c0ae | 943 | diff_words->last_minus = minus_first; |
f59a59e2 JS |
944 | } |
945 | ||
2b6a5417 JS |
946 | /* This function starts looking at *begin, and returns 0 iff a word was found. */ |
947 | static int find_word_boundaries(mmfile_t *buffer, regex_t *word_regex, | |
948 | int *begin, int *end) | |
949 | { | |
950 | if (word_regex && *begin < buffer->size) { | |
951 | regmatch_t match[1]; | |
b7d36ffc JS |
952 | if (!regexec_buf(word_regex, buffer->ptr + *begin, |
953 | buffer->size - *begin, 1, match, 0)) { | |
2b6a5417 JS |
954 | char *p = memchr(buffer->ptr + *begin + match[0].rm_so, |
955 | '\n', match[0].rm_eo - match[0].rm_so); | |
956 | *end = p ? p - buffer->ptr : match[0].rm_eo + *begin; | |
957 | *begin += match[0].rm_so; | |
958 | return *begin >= *end; | |
959 | } | |
960 | return -1; | |
f59a59e2 JS |
961 | } |
962 | ||
2b6a5417 JS |
963 | /* find the next word */ |
964 | while (*begin < buffer->size && isspace(buffer->ptr[*begin])) | |
965 | (*begin)++; | |
966 | if (*begin >= buffer->size) | |
967 | return -1; | |
f59a59e2 | 968 | |
2b6a5417 JS |
969 | /* find the end of the word */ |
970 | *end = *begin + 1; | |
971 | while (*end < buffer->size && !isspace(buffer->ptr[*end])) | |
972 | (*end)++; | |
973 | ||
974 | return 0; | |
f59a59e2 JS |
975 | } |
976 | ||
23c1575f | 977 | /* |
2e5d2003 JS |
978 | * This function splits the words in buffer->text, stores the list with |
979 | * newline separator into out, and saves the offsets of the original words | |
980 | * in buffer->orig. | |
23c1575f | 981 | */ |
2b6a5417 JS |
982 | static void diff_words_fill(struct diff_words_buffer *buffer, mmfile_t *out, |
983 | regex_t *word_regex) | |
f59a59e2 | 984 | { |
2e5d2003 | 985 | int i, j; |
2b6a5417 | 986 | long alloc = 0; |
f59a59e2 | 987 | |
2e5d2003 | 988 | out->size = 0; |
2b6a5417 | 989 | out->ptr = NULL; |
f59a59e2 | 990 | |
2e5d2003 JS |
991 | /* fake an empty "0th" word */ |
992 | ALLOC_GROW(buffer->orig, 1, buffer->orig_alloc); | |
993 | buffer->orig[0].begin = buffer->orig[0].end = buffer->text.ptr; | |
994 | buffer->orig_nr = 1; | |
995 | ||
996 | for (i = 0; i < buffer->text.size; i++) { | |
2b6a5417 JS |
997 | if (find_word_boundaries(&buffer->text, word_regex, &i, &j)) |
998 | return; | |
2e5d2003 JS |
999 | |
1000 | /* store original boundaries */ | |
1001 | ALLOC_GROW(buffer->orig, buffer->orig_nr + 1, | |
1002 | buffer->orig_alloc); | |
1003 | buffer->orig[buffer->orig_nr].begin = buffer->text.ptr + i; | |
1004 | buffer->orig[buffer->orig_nr].end = buffer->text.ptr + j; | |
1005 | buffer->orig_nr++; | |
1006 | ||
1007 | /* store one word */ | |
2b6a5417 | 1008 | ALLOC_GROW(out->ptr, out->size + j - i + 1, alloc); |
2e5d2003 JS |
1009 | memcpy(out->ptr + out->size, buffer->text.ptr + i, j - i); |
1010 | out->ptr[out->size + j - i] = '\n'; | |
1011 | out->size += j - i + 1; | |
1012 | ||
1013 | i = j - 1; | |
f59a59e2 JS |
1014 | } |
1015 | } | |
1016 | ||
1017 | /* this executes the word diff on the accumulated buffers */ | |
1018 | static void diff_words_show(struct diff_words_data *diff_words) | |
1019 | { | |
1020 | xpparam_t xpp; | |
1021 | xdemitconf_t xecfg; | |
f59a59e2 | 1022 | mmfile_t minus, plus; |
882749a0 | 1023 | struct diff_words_style *style = diff_words->style; |
f59a59e2 | 1024 | |
4297c0ae | 1025 | struct diff_options *opt = diff_words->opt; |
30997bb8 | 1026 | const char *line_prefix; |
4297c0ae BY |
1027 | |
1028 | assert(opt); | |
30997bb8 | 1029 | line_prefix = diff_line_prefix(opt); |
4297c0ae | 1030 | |
2e5d2003 JS |
1031 | /* special case: only removal */ |
1032 | if (!diff_words->plus.text.size) { | |
4297c0ae BY |
1033 | fputs(line_prefix, diff_words->opt->file); |
1034 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 1035 | &style->old, style->newline, |
4297c0ae BY |
1036 | diff_words->minus.text.size, |
1037 | diff_words->minus.text.ptr, line_prefix); | |
2e5d2003 JS |
1038 | diff_words->minus.text.size = 0; |
1039 | return; | |
1040 | } | |
1041 | ||
1042 | diff_words->current_plus = diff_words->plus.text.ptr; | |
4297c0ae | 1043 | diff_words->last_minus = 0; |
f59a59e2 | 1044 | |
9ccd0a88 | 1045 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 1046 | memset(&xecfg, 0, sizeof(xecfg)); |
2b6a5417 JS |
1047 | diff_words_fill(&diff_words->minus, &minus, diff_words->word_regex); |
1048 | diff_words_fill(&diff_words->plus, &plus, diff_words->word_regex); | |
582aa00b | 1049 | xpp.flags = 0; |
2b6a5417 | 1050 | /* as only the hunk header will be parsed, we need a 0-context */ |
2e5d2003 | 1051 | xecfg.ctxlen = 0; |
3efb9880 JK |
1052 | if (xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words, |
1053 | &xpp, &xecfg)) | |
1054 | die("unable to generate word diff"); | |
f59a59e2 JS |
1055 | free(minus.ptr); |
1056 | free(plus.ptr); | |
2e5d2003 | 1057 | if (diff_words->current_plus != diff_words->plus.text.ptr + |
4297c0ae BY |
1058 | diff_words->plus.text.size) { |
1059 | if (color_words_output_graph_prefix(diff_words)) | |
1060 | fputs(line_prefix, diff_words->opt->file); | |
1061 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 1062 | &style->ctx, style->newline, |
2e5d2003 | 1063 | diff_words->plus.text.ptr + diff_words->plus.text.size |
4297c0ae BY |
1064 | - diff_words->current_plus, diff_words->current_plus, |
1065 | line_prefix); | |
1066 | } | |
f59a59e2 | 1067 | diff_words->minus.text.size = diff_words->plus.text.size = 0; |
f59a59e2 JS |
1068 | } |
1069 | ||
76fd2828 JH |
1070 | /* In "color-words" mode, show word-diff of words accumulated in the buffer */ |
1071 | static void diff_words_flush(struct emit_callback *ecbdata) | |
1072 | { | |
1073 | if (ecbdata->diff_words->minus.text.size || | |
1074 | ecbdata->diff_words->plus.text.size) | |
1075 | diff_words_show(ecbdata->diff_words); | |
1076 | } | |
1077 | ||
77d1a520 TR |
1078 | static void diff_filespec_load_driver(struct diff_filespec *one) |
1079 | { | |
1080 | /* Use already-loaded driver */ | |
1081 | if (one->driver) | |
1082 | return; | |
1083 | ||
1084 | if (S_ISREG(one->mode)) | |
1085 | one->driver = userdiff_find_by_path(one->path); | |
1086 | ||
1087 | /* Fallback to default settings */ | |
1088 | if (!one->driver) | |
1089 | one->driver = userdiff_find_by_name("default"); | |
1090 | } | |
1091 | ||
1092 | static const char *userdiff_word_regex(struct diff_filespec *one) | |
1093 | { | |
1094 | diff_filespec_load_driver(one); | |
1095 | return one->driver->word_regex; | |
1096 | } | |
1097 | ||
1098 | static void init_diff_words_data(struct emit_callback *ecbdata, | |
6440d341 | 1099 | struct diff_options *orig_opts, |
77d1a520 TR |
1100 | struct diff_filespec *one, |
1101 | struct diff_filespec *two) | |
1102 | { | |
1103 | int i; | |
6440d341 TR |
1104 | struct diff_options *o = xmalloc(sizeof(struct diff_options)); |
1105 | memcpy(o, orig_opts, sizeof(struct diff_options)); | |
77d1a520 TR |
1106 | |
1107 | ecbdata->diff_words = | |
1108 | xcalloc(1, sizeof(struct diff_words_data)); | |
1109 | ecbdata->diff_words->type = o->word_diff; | |
1110 | ecbdata->diff_words->opt = o; | |
1111 | if (!o->word_regex) | |
1112 | o->word_regex = userdiff_word_regex(one); | |
1113 | if (!o->word_regex) | |
1114 | o->word_regex = userdiff_word_regex(two); | |
1115 | if (!o->word_regex) | |
1116 | o->word_regex = diff_word_regex_cfg; | |
1117 | if (o->word_regex) { | |
1118 | ecbdata->diff_words->word_regex = (regex_t *) | |
1119 | xmalloc(sizeof(regex_t)); | |
1120 | if (regcomp(ecbdata->diff_words->word_regex, | |
1121 | o->word_regex, | |
1122 | REG_EXTENDED | REG_NEWLINE)) | |
1123 | die ("Invalid regular expression: %s", | |
1124 | o->word_regex); | |
1125 | } | |
1126 | for (i = 0; i < ARRAY_SIZE(diff_words_styles); i++) { | |
1127 | if (o->word_diff == diff_words_styles[i].type) { | |
1128 | ecbdata->diff_words->style = | |
1129 | &diff_words_styles[i]; | |
1130 | break; | |
1131 | } | |
1132 | } | |
1133 | if (want_color(o->use_color)) { | |
1134 | struct diff_words_style *st = ecbdata->diff_words->style; | |
1135 | st->old.color = diff_get_color_opt(o, DIFF_FILE_OLD); | |
1136 | st->new.color = diff_get_color_opt(o, DIFF_FILE_NEW); | |
8dbf3eb6 | 1137 | st->ctx.color = diff_get_color_opt(o, DIFF_CONTEXT); |
77d1a520 TR |
1138 | } |
1139 | } | |
1140 | ||
f59a59e2 JS |
1141 | static void free_diff_words_data(struct emit_callback *ecbdata) |
1142 | { | |
1143 | if (ecbdata->diff_words) { | |
76fd2828 | 1144 | diff_words_flush(ecbdata); |
6440d341 | 1145 | free (ecbdata->diff_words->opt); |
8e0f7003 | 1146 | free (ecbdata->diff_words->minus.text.ptr); |
2e5d2003 | 1147 | free (ecbdata->diff_words->minus.orig); |
8e0f7003 | 1148 | free (ecbdata->diff_words->plus.text.ptr); |
2e5d2003 | 1149 | free (ecbdata->diff_words->plus.orig); |
ef5644ea BC |
1150 | if (ecbdata->diff_words->word_regex) { |
1151 | regfree(ecbdata->diff_words->word_regex); | |
1152 | free(ecbdata->diff_words->word_regex); | |
1153 | } | |
f59a59e2 JS |
1154 | free(ecbdata->diff_words); |
1155 | ecbdata->diff_words = NULL; | |
1156 | } | |
1157 | } | |
1158 | ||
ce436973 | 1159 | const char *diff_get_color(int diff_use_color, enum color_diff ix) |
cd112cef | 1160 | { |
daa0c3d9 | 1161 | if (want_color(diff_use_color)) |
50f575fc LT |
1162 | return diff_colors[ix]; |
1163 | return ""; | |
cd112cef JS |
1164 | } |
1165 | ||
f1922234 JK |
1166 | const char *diff_line_prefix(struct diff_options *opt) |
1167 | { | |
1168 | struct strbuf *msgbuf; | |
1169 | if (!opt->output_prefix) | |
1170 | return ""; | |
1171 | ||
1172 | msgbuf = opt->output_prefix(opt, opt->output_prefix_data); | |
1173 | return msgbuf->buf; | |
1174 | } | |
1175 | ||
23707811 JH |
1176 | static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len) |
1177 | { | |
1178 | const char *cp; | |
1179 | unsigned long allot; | |
1180 | size_t l = len; | |
1181 | ||
1182 | if (ecb->truncate) | |
1183 | return ecb->truncate(line, len); | |
1184 | cp = line; | |
1185 | allot = l; | |
1186 | while (0 < l) { | |
1187 | (void) utf8_width(&cp, &l); | |
1188 | if (!cp) | |
1189 | break; /* truncated in the middle? */ | |
1190 | } | |
1191 | return allot - l; | |
1192 | } | |
1193 | ||
d68fe26f | 1194 | static void find_lno(const char *line, struct emit_callback *ecbdata) |
690ed843 | 1195 | { |
d68fe26f JH |
1196 | const char *p; |
1197 | ecbdata->lno_in_preimage = 0; | |
1198 | ecbdata->lno_in_postimage = 0; | |
1199 | p = strchr(line, '-'); | |
690ed843 | 1200 | if (!p) |
d68fe26f JH |
1201 | return; /* cannot happen */ |
1202 | ecbdata->lno_in_preimage = strtol(p + 1, NULL, 10); | |
1203 | p = strchr(p, '+'); | |
1204 | if (!p) | |
1205 | return; /* cannot happen */ | |
1206 | ecbdata->lno_in_postimage = strtol(p + 1, NULL, 10); | |
690ed843 JH |
1207 | } |
1208 | ||
cd112cef | 1209 | static void fn_out_consume(void *priv, char *line, unsigned long len) |
6973dcae | 1210 | { |
6973dcae | 1211 | struct emit_callback *ecbdata = priv; |
472ca780 | 1212 | const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO); |
8dbf3eb6 | 1213 | const char *context = diff_get_color(ecbdata->color_diff, DIFF_CONTEXT); |
ce436973 | 1214 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); |
7be57610 | 1215 | struct diff_options *o = ecbdata->opt; |
30997bb8 | 1216 | const char *line_prefix = diff_line_prefix(o); |
6973dcae | 1217 | |
ba16233c SB |
1218 | o->found_changes = 1; |
1219 | ||
3e97c7c6 | 1220 | if (ecbdata->header) { |
fb33b62c | 1221 | fprintf(o->file, "%s", ecbdata->header->buf); |
3e97c7c6 GB |
1222 | strbuf_reset(ecbdata->header); |
1223 | ecbdata->header = NULL; | |
1224 | } | |
34a5e1a2 | 1225 | |
6973dcae | 1226 | if (ecbdata->label_path[0]) { |
1a9eb3b9 JH |
1227 | const char *name_a_tab, *name_b_tab; |
1228 | ||
1229 | name_a_tab = strchr(ecbdata->label_path[0], ' ') ? "\t" : ""; | |
1230 | name_b_tab = strchr(ecbdata->label_path[1], ' ') ? "\t" : ""; | |
1231 | ||
fb33b62c | 1232 | fprintf(o->file, "%s%s--- %s%s%s\n", |
7be57610 | 1233 | line_prefix, meta, ecbdata->label_path[0], reset, name_a_tab); |
fb33b62c | 1234 | fprintf(o->file, "%s%s+++ %s%s%s\n", |
7be57610 | 1235 | line_prefix, meta, ecbdata->label_path[1], reset, name_b_tab); |
6973dcae JH |
1236 | ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; |
1237 | } | |
cd112cef | 1238 | |
a624eaa7 JM |
1239 | if (diff_suppress_blank_empty |
1240 | && len == 2 && line[0] == ' ' && line[1] == '\n') { | |
1241 | line[0] = '\n'; | |
1242 | len = 1; | |
1243 | } | |
1244 | ||
b8d9c1a6 | 1245 | if (line[0] == '@') { |
76fd2828 JH |
1246 | if (ecbdata->diff_words) |
1247 | diff_words_flush(ecbdata); | |
23707811 | 1248 | len = sane_truncate_line(ecbdata, line, len); |
d68fe26f | 1249 | find_lno(line, ecbdata); |
89cb73a1 | 1250 | emit_hunk_header(ecbdata, line, len); |
23707811 | 1251 | if (line[len-1] != '\n') |
fb33b62c | 1252 | putc('\n', o->file); |
448c3ef1 | 1253 | return; |
cd112cef | 1254 | } |
448c3ef1 | 1255 | |
448c3ef1 JH |
1256 | if (ecbdata->diff_words) { |
1257 | if (line[0] == '-') { | |
1258 | diff_words_append(line, len, | |
1259 | &ecbdata->diff_words->minus); | |
1260 | return; | |
1261 | } else if (line[0] == '+') { | |
1262 | diff_words_append(line, len, | |
1263 | &ecbdata->diff_words->plus); | |
1264 | return; | |
59556548 | 1265 | } else if (starts_with(line, "\\ ")) { |
c7c2bc0a TR |
1266 | /* |
1267 | * Eat the "no newline at eof" marker as if we | |
1268 | * saw a "+" or "-" line with nothing on it, | |
1269 | * and return without diff_words_flush() to | |
1270 | * defer processing. If this is the end of | |
1271 | * preimage, more "+" lines may come after it. | |
1272 | */ | |
1273 | return; | |
448c3ef1 | 1274 | } |
76fd2828 | 1275 | diff_words_flush(ecbdata); |
882749a0 | 1276 | if (ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) { |
fb33b62c SB |
1277 | emit_line(o, context, reset, line, len); |
1278 | fputs("~\n", o->file); | |
882749a0 | 1279 | } else { |
42536dd9 JM |
1280 | /* |
1281 | * Skip the prefix character, if any. With | |
1282 | * diff_suppress_blank_empty, there may be | |
1283 | * none. | |
1284 | */ | |
1285 | if (line[0] != '\n') { | |
1286 | line++; | |
1287 | len--; | |
1288 | } | |
fb33b62c | 1289 | emit_line(o, context, reset, line, len); |
882749a0 | 1290 | } |
448c3ef1 JH |
1291 | return; |
1292 | } | |
448c3ef1 | 1293 | |
0e383e18 JH |
1294 | switch (line[0]) { |
1295 | case '+': | |
d68fe26f | 1296 | ecbdata->lno_in_postimage++; |
018cff70 | 1297 | emit_add_line(reset, ecbdata, line + 1, len - 1); |
0e383e18 JH |
1298 | break; |
1299 | case '-': | |
1300 | ecbdata->lno_in_preimage++; | |
1301 | emit_del_line(reset, ecbdata, line + 1, len - 1); | |
1302 | break; | |
1303 | case ' ': | |
1304 | ecbdata->lno_in_postimage++; | |
1305 | ecbdata->lno_in_preimage++; | |
1306 | emit_context_line(reset, ecbdata, line + 1, len - 1); | |
1307 | break; | |
1308 | default: | |
1309 | /* incomplete line at the end */ | |
1310 | ecbdata->lno_in_preimage++; | |
fb33b62c | 1311 | emit_line(o, diff_get_color(ecbdata->color_diff, DIFF_CONTEXT), |
0e383e18 JH |
1312 | reset, line, len); |
1313 | break; | |
448c3ef1 | 1314 | } |
6973dcae JH |
1315 | } |
1316 | ||
1317 | static char *pprint_rename(const char *a, const char *b) | |
1318 | { | |
1319 | const char *old = a; | |
1320 | const char *new = b; | |
f285a2d7 | 1321 | struct strbuf name = STRBUF_INIT; |
6973dcae | 1322 | int pfx_length, sfx_length; |
dd281f09 | 1323 | int pfx_adjust_for_slash; |
6973dcae JH |
1324 | int len_a = strlen(a); |
1325 | int len_b = strlen(b); | |
663af342 | 1326 | int a_midlen, b_midlen; |
e5bfbf9b AJ |
1327 | int qlen_a = quote_c_style(a, NULL, NULL, 0); |
1328 | int qlen_b = quote_c_style(b, NULL, NULL, 0); | |
1329 | ||
1330 | if (qlen_a || qlen_b) { | |
663af342 PH |
1331 | quote_c_style(a, &name, NULL, 0); |
1332 | strbuf_addstr(&name, " => "); | |
1333 | quote_c_style(b, &name, NULL, 0); | |
b315c5c0 | 1334 | return strbuf_detach(&name, NULL); |
e5bfbf9b | 1335 | } |
6973dcae JH |
1336 | |
1337 | /* Find common prefix */ | |
1338 | pfx_length = 0; | |
1339 | while (*old && *new && *old == *new) { | |
1340 | if (*old == '/') | |
1341 | pfx_length = old - a + 1; | |
1342 | old++; | |
1343 | new++; | |
1344 | } | |
1345 | ||
1346 | /* Find common suffix */ | |
1347 | old = a + len_a; | |
1348 | new = b + len_b; | |
1349 | sfx_length = 0; | |
d020e27f | 1350 | /* |
dd281f09 TR |
1351 | * If there is a common prefix, it must end in a slash. In |
1352 | * that case we let this loop run 1 into the prefix to see the | |
1353 | * same slash. | |
1354 | * | |
1355 | * If there is no common prefix, we cannot do this as it would | |
1356 | * underrun the input strings. | |
d020e27f | 1357 | */ |
dd281f09 TR |
1358 | pfx_adjust_for_slash = (pfx_length ? 1 : 0); |
1359 | while (a + pfx_length - pfx_adjust_for_slash <= old && | |
1360 | b + pfx_length - pfx_adjust_for_slash <= new && | |
d020e27f | 1361 | *old == *new) { |
6973dcae JH |
1362 | if (*old == '/') |
1363 | sfx_length = len_a - (old - a); | |
1364 | old--; | |
1365 | new--; | |
1366 | } | |
1367 | ||
1368 | /* | |
1369 | * pfx{mid-a => mid-b}sfx | |
1370 | * {pfx-a => pfx-b}sfx | |
1371 | * pfx{sfx-a => sfx-b} | |
1372 | * name-a => name-b | |
1373 | */ | |
663af342 PH |
1374 | a_midlen = len_a - pfx_length - sfx_length; |
1375 | b_midlen = len_b - pfx_length - sfx_length; | |
1376 | if (a_midlen < 0) | |
1377 | a_midlen = 0; | |
1378 | if (b_midlen < 0) | |
1379 | b_midlen = 0; | |
1380 | ||
1381 | strbuf_grow(&name, pfx_length + a_midlen + b_midlen + sfx_length + 7); | |
6973dcae | 1382 | if (pfx_length + sfx_length) { |
663af342 PH |
1383 | strbuf_add(&name, a, pfx_length); |
1384 | strbuf_addch(&name, '{'); | |
6973dcae | 1385 | } |
663af342 PH |
1386 | strbuf_add(&name, a + pfx_length, a_midlen); |
1387 | strbuf_addstr(&name, " => "); | |
1388 | strbuf_add(&name, b + pfx_length, b_midlen); | |
1389 | if (pfx_length + sfx_length) { | |
1390 | strbuf_addch(&name, '}'); | |
1391 | strbuf_add(&name, a + len_a - sfx_length, sfx_length); | |
6973dcae | 1392 | } |
b315c5c0 | 1393 | return strbuf_detach(&name, NULL); |
6973dcae JH |
1394 | } |
1395 | ||
1396 | struct diffstat_t { | |
6973dcae JH |
1397 | int nr; |
1398 | int alloc; | |
1399 | struct diffstat_file { | |
f604652e | 1400 | char *from_name; |
6973dcae | 1401 | char *name; |
f604652e | 1402 | char *print_name; |
6973dcae JH |
1403 | unsigned is_unmerged:1; |
1404 | unsigned is_binary:1; | |
1405 | unsigned is_renamed:1; | |
74faaa16 | 1406 | unsigned is_interesting:1; |
0974c117 | 1407 | uintmax_t added, deleted; |
6973dcae JH |
1408 | } **files; |
1409 | }; | |
1410 | ||
1411 | static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat, | |
1412 | const char *name_a, | |
1413 | const char *name_b) | |
1414 | { | |
1415 | struct diffstat_file *x; | |
1a4927c5 | 1416 | x = xcalloc(1, sizeof(*x)); |
4c960a43 | 1417 | ALLOC_GROW(diffstat->files, diffstat->nr + 1, diffstat->alloc); |
6973dcae JH |
1418 | diffstat->files[diffstat->nr++] = x; |
1419 | if (name_b) { | |
f604652e JH |
1420 | x->from_name = xstrdup(name_a); |
1421 | x->name = xstrdup(name_b); | |
6973dcae JH |
1422 | x->is_renamed = 1; |
1423 | } | |
f604652e JH |
1424 | else { |
1425 | x->from_name = NULL; | |
9befac47 | 1426 | x->name = xstrdup(name_a); |
f604652e | 1427 | } |
6973dcae JH |
1428 | return x; |
1429 | } | |
1430 | ||
1431 | static void diffstat_consume(void *priv, char *line, unsigned long len) | |
1432 | { | |
1433 | struct diffstat_t *diffstat = priv; | |
1434 | struct diffstat_file *x = diffstat->files[diffstat->nr - 1]; | |
1435 | ||
1436 | if (line[0] == '+') | |
1437 | x->added++; | |
1438 | else if (line[0] == '-') | |
1439 | x->deleted++; | |
1440 | } | |
1441 | ||
698ce6f8 | 1442 | const char mime_boundary_leader[] = "------------"; |
6973dcae | 1443 | |
a2540023 JH |
1444 | static int scale_linear(int it, int width, int max_change) |
1445 | { | |
2eeeef24 JH |
1446 | if (!it) |
1447 | return 0; | |
a2540023 | 1448 | /* |
2eeeef24 JH |
1449 | * make sure that at least one '-' or '+' is printed if |
1450 | * there is any change to this path. The easiest way is to | |
1451 | * scale linearly as if the alloted width is one column shorter | |
1452 | * than it is, and then add 1 to the result. | |
a2540023 | 1453 | */ |
2eeeef24 | 1454 | return 1 + (it * (width - 1) / max_change); |
a2540023 JH |
1455 | } |
1456 | ||
c0c77734 | 1457 | static void show_name(FILE *file, |
a408e0e6 | 1458 | const char *prefix, const char *name, int len) |
a2540023 | 1459 | { |
a408e0e6 | 1460 | fprintf(file, " %s%-*s |", prefix, len, name); |
a2540023 JH |
1461 | } |
1462 | ||
c0c77734 | 1463 | static void show_graph(FILE *file, char ch, int cnt, const char *set, const char *reset) |
a2540023 JH |
1464 | { |
1465 | if (cnt <= 0) | |
1466 | return; | |
c0c77734 | 1467 | fprintf(file, "%s", set); |
a2540023 | 1468 | while (cnt--) |
c0c77734 DB |
1469 | putc(ch, file); |
1470 | fprintf(file, "%s", reset); | |
a2540023 JH |
1471 | } |
1472 | ||
f604652e JH |
1473 | static void fill_print_name(struct diffstat_file *file) |
1474 | { | |
1475 | char *pname; | |
1476 | ||
1477 | if (file->print_name) | |
1478 | return; | |
1479 | ||
1480 | if (!file->is_renamed) { | |
f285a2d7 | 1481 | struct strbuf buf = STRBUF_INIT; |
f604652e JH |
1482 | if (quote_c_style(file->name, &buf, NULL, 0)) { |
1483 | pname = strbuf_detach(&buf, NULL); | |
1484 | } else { | |
1485 | pname = file->name; | |
1486 | strbuf_release(&buf); | |
1487 | } | |
1488 | } else { | |
1489 | pname = pprint_rename(file->from_name, file->name); | |
1490 | } | |
1491 | file->print_name = pname; | |
1492 | } | |
1493 | ||
7f814632 NTND |
1494 | int print_stat_summary(FILE *fp, int files, int insertions, int deletions) |
1495 | { | |
1496 | struct strbuf sb = STRBUF_INIT; | |
1497 | int ret; | |
1498 | ||
1499 | if (!files) { | |
1500 | assert(insertions == 0 && deletions == 0); | |
218adaaa | 1501 | return fprintf(fp, "%s\n", " 0 files changed"); |
7f814632 NTND |
1502 | } |
1503 | ||
1504 | strbuf_addf(&sb, | |
218adaaa | 1505 | (files == 1) ? " %d file changed" : " %d files changed", |
7f814632 NTND |
1506 | files); |
1507 | ||
1508 | /* | |
1509 | * For binary diff, the caller may want to print "x files | |
1510 | * changed" with insertions == 0 && deletions == 0. | |
1511 | * | |
1512 | * Not omitting "0 insertions(+), 0 deletions(-)" in this case | |
1513 | * is probably less confusing (i.e skip over "2 files changed | |
1514 | * but nothing about added/removed lines? Is this a bug in Git?"). | |
1515 | */ | |
1516 | if (insertions || deletions == 0) { | |
7f814632 | 1517 | strbuf_addf(&sb, |
218adaaa | 1518 | (insertions == 1) ? ", %d insertion(+)" : ", %d insertions(+)", |
7f814632 NTND |
1519 | insertions); |
1520 | } | |
1521 | ||
1522 | if (deletions || insertions == 0) { | |
7f814632 | 1523 | strbuf_addf(&sb, |
218adaaa | 1524 | (deletions == 1) ? ", %d deletion(-)" : ", %d deletions(-)", |
7f814632 NTND |
1525 | deletions); |
1526 | } | |
1527 | strbuf_addch(&sb, '\n'); | |
1528 | ret = fputs(sb.buf, fp); | |
1529 | strbuf_release(&sb); | |
1530 | return ret; | |
1531 | } | |
1532 | ||
4b25d091 | 1533 | static void show_stats(struct diffstat_t *data, struct diff_options *options) |
6973dcae | 1534 | { |
eb3a9dd3 | 1535 | int i, len, add, del, adds = 0, dels = 0; |
0974c117 | 1536 | uintmax_t max_change = 0, max_len = 0; |
dc801e71 ZJS |
1537 | int total_files = data->nr, count; |
1538 | int width, name_width, graph_width, number_width = 0, bin_width = 0; | |
c0aa335c | 1539 | const char *reset, *add_c, *del_c; |
7be57610 | 1540 | const char *line_prefix = ""; |
e5f85df8 | 1541 | int extra_shown = 0; |
6973dcae JH |
1542 | |
1543 | if (data->nr == 0) | |
1544 | return; | |
1545 | ||
30997bb8 | 1546 | line_prefix = diff_line_prefix(options); |
808e1db2 | 1547 | count = options->stat_count ? options->stat_count : data->nr; |
a2540023 | 1548 | |
8f67f8ae | 1549 | reset = diff_get_color_opt(options, DIFF_RESET); |
8f67f8ae PH |
1550 | add_c = diff_get_color_opt(options, DIFF_FILE_NEW); |
1551 | del_c = diff_get_color_opt(options, DIFF_FILE_OLD); | |
785f7432 | 1552 | |
1b058bc3 ZJS |
1553 | /* |
1554 | * Find the longest filename and max number of changes | |
1555 | */ | |
808e1db2 | 1556 | for (i = 0; (i < count) && (i < data->nr); i++) { |
6973dcae | 1557 | struct diffstat_file *file = data->files[i]; |
0974c117 | 1558 | uintmax_t change = file->added + file->deleted; |
af0ed819 JH |
1559 | |
1560 | if (!file->is_interesting && (change == 0)) { | |
808e1db2 | 1561 | count++; /* not shown == room for one more */ |
358e460e MG |
1562 | continue; |
1563 | } | |
f604652e JH |
1564 | fill_print_name(file); |
1565 | len = strlen(file->print_name); | |
6973dcae JH |
1566 | if (max_len < len) |
1567 | max_len = len; | |
1568 | ||
dc801e71 ZJS |
1569 | if (file->is_unmerged) { |
1570 | /* "Unmerged" is 8 characters */ | |
1571 | bin_width = bin_width < 8 ? 8 : bin_width; | |
6973dcae | 1572 | continue; |
dc801e71 ZJS |
1573 | } |
1574 | if (file->is_binary) { | |
1575 | /* "Bin XXX -> YYY bytes" */ | |
1576 | int w = 14 + decimal_width(file->added) | |
1577 | + decimal_width(file->deleted); | |
1578 | bin_width = bin_width < w ? w : bin_width; | |
1579 | /* Display change counts aligned with "Bin" */ | |
1580 | number_width = 3; | |
1581 | continue; | |
1582 | } | |
1583 | ||
a2540023 JH |
1584 | if (max_change < change) |
1585 | max_change = change; | |
6973dcae | 1586 | } |
a20d3c0d | 1587 | count = i; /* where we can stop scanning in data->files[] */ |
6973dcae | 1588 | |
1b058bc3 ZJS |
1589 | /* |
1590 | * We have width = stat_width or term_columns() columns total. | |
1591 | * We want a maximum of min(max_len, stat_name_width) for the name part. | |
969fe57b | 1592 | * We want a maximum of min(max_change, stat_graph_width) for the +- part. |
1b058bc3 ZJS |
1593 | * We also need 1 for " " and 4 + decimal_width(max_change) |
1594 | * for " | NNNN " and one the empty column at the end, altogether | |
1595 | * 6 + decimal_width(max_change). | |
1596 | * | |
1597 | * If there's not enough space, we will use the smaller of | |
1598 | * stat_name_width (if set) and 5/8*width for the filename, | |
969fe57b ZJS |
1599 | * and the rest for constant elements + graph part, but no more |
1600 | * than stat_graph_width for the graph part. | |
1b058bc3 ZJS |
1601 | * (5/8 gives 50 for filename and 30 for the constant parts + graph |
1602 | * for the standard terminal size). | |
a2540023 | 1603 | * |
1b058bc3 ZJS |
1604 | * In other words: stat_width limits the maximum width, and |
1605 | * stat_name_width fixes the maximum width of the filename, | |
1606 | * and is also used to divide available columns if there | |
1607 | * aren't enough. | |
dc801e71 ZJS |
1608 | * |
1609 | * Binary files are displayed with "Bin XXX -> YYY bytes" | |
1610 | * instead of the change count and graph. This part is treated | |
1611 | * similarly to the graph part, except that it is not | |
41ccfdd9 | 1612 | * "scaled". If total width is too small to accommodate the |
dc801e71 ZJS |
1613 | * guaranteed minimum width of the filename part and the |
1614 | * separators and this message, this message will "overflow" | |
1615 | * making the line longer than the maximum width. | |
a2540023 | 1616 | */ |
1b058bc3 ZJS |
1617 | |
1618 | if (options->stat_width == -1) | |
3f145132 | 1619 | width = term_columns() - options->output_prefix_length; |
a2540023 | 1620 | else |
1b058bc3 | 1621 | width = options->stat_width ? options->stat_width : 80; |
dc801e71 ZJS |
1622 | number_width = decimal_width(max_change) > number_width ? |
1623 | decimal_width(max_change) : number_width; | |
a2540023 | 1624 | |
df44483a ZJS |
1625 | if (options->stat_graph_width == -1) |
1626 | options->stat_graph_width = diff_stat_graph_width; | |
a2540023 | 1627 | |
1b058bc3 ZJS |
1628 | /* |
1629 | * Guarantee 3/8*16==6 for the graph part | |
1630 | * and 5/8*16==10 for the filename part | |
1631 | */ | |
1632 | if (width < 16 + 6 + number_width) | |
1633 | width = 16 + 6 + number_width; | |
1634 | ||
1635 | /* | |
1636 | * First assign sizes that are wanted, ignoring available width. | |
dc801e71 ZJS |
1637 | * strlen("Bin XXX -> YYY bytes") == bin_width, and the part |
1638 | * starting from "XXX" should fit in graph_width. | |
1b058bc3 | 1639 | */ |
dc801e71 ZJS |
1640 | graph_width = max_change + 4 > bin_width ? max_change : bin_width - 4; |
1641 | if (options->stat_graph_width && | |
1642 | options->stat_graph_width < graph_width) | |
1643 | graph_width = options->stat_graph_width; | |
1644 | ||
1b058bc3 ZJS |
1645 | name_width = (options->stat_name_width > 0 && |
1646 | options->stat_name_width < max_len) ? | |
1647 | options->stat_name_width : max_len; | |
1648 | ||
1649 | /* | |
1650 | * Adjust adjustable widths not to exceed maximum width | |
1651 | */ | |
1652 | if (name_width + number_width + 6 + graph_width > width) { | |
678c5741 | 1653 | if (graph_width > width * 3/8 - number_width - 6) { |
1b058bc3 | 1654 | graph_width = width * 3/8 - number_width - 6; |
678c5741 LP |
1655 | if (graph_width < 6) |
1656 | graph_width = 6; | |
1657 | } | |
1658 | ||
969fe57b ZJS |
1659 | if (options->stat_graph_width && |
1660 | graph_width > options->stat_graph_width) | |
1661 | graph_width = options->stat_graph_width; | |
1b058bc3 ZJS |
1662 | if (name_width > width - number_width - 6 - graph_width) |
1663 | name_width = width - number_width - 6 - graph_width; | |
1664 | else | |
1665 | graph_width = width - number_width - 6 - name_width; | |
1666 | } | |
1667 | ||
1668 | /* | |
1669 | * From here name_width is the width of the name area, | |
1670 | * and graph_width is the width of the graph area. | |
1671 | * max_change is used to scale graph properly. | |
1672 | */ | |
808e1db2 | 1673 | for (i = 0; i < count; i++) { |
d2543b8e | 1674 | const char *prefix = ""; |
af0ed819 JH |
1675 | struct diffstat_file *file = data->files[i]; |
1676 | char *name = file->print_name; | |
1677 | uintmax_t added = file->added; | |
1678 | uintmax_t deleted = file->deleted; | |
a2540023 | 1679 | int name_len; |
6973dcae | 1680 | |
a20d3c0d | 1681 | if (!file->is_interesting && (added + deleted == 0)) |
358e460e | 1682 | continue; |
a20d3c0d | 1683 | |
6973dcae JH |
1684 | /* |
1685 | * "scale" the filename | |
1686 | */ | |
a2540023 JH |
1687 | len = name_width; |
1688 | name_len = strlen(name); | |
1689 | if (name_width < name_len) { | |
6973dcae JH |
1690 | char *slash; |
1691 | prefix = "..."; | |
a2540023 JH |
1692 | len -= 3; |
1693 | name += name_len - len; | |
6973dcae JH |
1694 | slash = strchr(name, '/'); |
1695 | if (slash) | |
1696 | name = slash; | |
1697 | } | |
6973dcae | 1698 | |
af0ed819 | 1699 | if (file->is_binary) { |
7be57610 | 1700 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1701 | show_name(options->file, prefix, name, len); |
fc1320bf | 1702 | fprintf(options->file, " %*s", number_width, "Bin"); |
e18872b2 ZJS |
1703 | if (!added && !deleted) { |
1704 | putc('\n', options->file); | |
1705 | continue; | |
1706 | } | |
1707 | fprintf(options->file, " %s%"PRIuMAX"%s", | |
0974c117 | 1708 | del_c, deleted, reset); |
c0c77734 | 1709 | fprintf(options->file, " -> "); |
0974c117 JK |
1710 | fprintf(options->file, "%s%"PRIuMAX"%s", |
1711 | add_c, added, reset); | |
c0c77734 DB |
1712 | fprintf(options->file, " bytes"); |
1713 | fprintf(options->file, "\n"); | |
f604652e | 1714 | continue; |
6973dcae | 1715 | } |
af0ed819 | 1716 | else if (file->is_unmerged) { |
7be57610 | 1717 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1718 | show_name(options->file, prefix, name, len); |
dc801e71 | 1719 | fprintf(options->file, " Unmerged\n"); |
f604652e | 1720 | continue; |
6973dcae | 1721 | } |
6973dcae | 1722 | |
a2540023 JH |
1723 | /* |
1724 | * scale the add/delete | |
1725 | */ | |
6973dcae JH |
1726 | add = added; |
1727 | del = deleted; | |
6973dcae | 1728 | |
1b058bc3 | 1729 | if (graph_width <= max_change) { |
d3c9cf32 | 1730 | int total = scale_linear(add + del, graph_width, max_change); |
2eeeef24 JH |
1731 | if (total < 2 && add && del) |
1732 | /* width >= 2 due to the sanity check */ | |
1733 | total = 2; | |
1734 | if (add < del) { | |
1b058bc3 | 1735 | add = scale_linear(add, graph_width, max_change); |
2eeeef24 JH |
1736 | del = total - add; |
1737 | } else { | |
1b058bc3 | 1738 | del = scale_linear(del, graph_width, max_change); |
2eeeef24 JH |
1739 | add = total - del; |
1740 | } | |
6973dcae | 1741 | } |
7be57610 | 1742 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1743 | show_name(options->file, prefix, name, len); |
dc801e71 ZJS |
1744 | fprintf(options->file, " %*"PRIuMAX"%s", |
1745 | number_width, added + deleted, | |
1746 | added + deleted ? " " : ""); | |
c0c77734 DB |
1747 | show_graph(options->file, '+', add, add_c, reset); |
1748 | show_graph(options->file, '-', del, del_c, reset); | |
1749 | fprintf(options->file, "\n"); | |
1750 | } | |
a20d3c0d JH |
1751 | |
1752 | for (i = 0; i < data->nr; i++) { | |
af0ed819 JH |
1753 | struct diffstat_file *file = data->files[i]; |
1754 | uintmax_t added = file->added; | |
1755 | uintmax_t deleted = file->deleted; | |
82dfc2c4 JH |
1756 | |
1757 | if (file->is_unmerged || | |
1758 | (!file->is_interesting && (added + deleted == 0))) { | |
808e1db2 MG |
1759 | total_files--; |
1760 | continue; | |
1761 | } | |
a20d3c0d | 1762 | |
82dfc2c4 | 1763 | if (!file->is_binary) { |
a20d3c0d JH |
1764 | adds += added; |
1765 | dels += deleted; | |
1766 | } | |
1767 | if (i < count) | |
1768 | continue; | |
e5f85df8 JH |
1769 | if (!extra_shown) |
1770 | fprintf(options->file, "%s ...\n", line_prefix); | |
1771 | extra_shown = 1; | |
808e1db2 | 1772 | } |
7be57610 | 1773 | fprintf(options->file, "%s", line_prefix); |
7f814632 | 1774 | print_stat_summary(options->file, total_files, adds, dels); |
6973dcae JH |
1775 | } |
1776 | ||
2775d92c | 1777 | static void show_shortstats(struct diffstat_t *data, struct diff_options *options) |
ebd124c6 NP |
1778 | { |
1779 | int i, adds = 0, dels = 0, total_files = data->nr; | |
1780 | ||
1781 | if (data->nr == 0) | |
1782 | return; | |
1783 | ||
1784 | for (i = 0; i < data->nr; i++) { | |
e18872b2 ZJS |
1785 | int added = data->files[i]->added; |
1786 | int deleted= data->files[i]->deleted; | |
1787 | ||
20c8cde4 JH |
1788 | if (data->files[i]->is_unmerged || |
1789 | (!data->files[i]->is_interesting && (added + deleted == 0))) { | |
e18872b2 | 1790 | total_files--; |
de9658b5 | 1791 | } else if (!data->files[i]->is_binary) { /* don't count bytes */ |
e18872b2 ZJS |
1792 | adds += added; |
1793 | dels += deleted; | |
ebd124c6 | 1794 | } |
ebd124c6 | 1795 | } |
30997bb8 | 1796 | fprintf(options->file, "%s", diff_line_prefix(options)); |
7f814632 | 1797 | print_stat_summary(options->file, total_files, adds, dels); |
ebd124c6 NP |
1798 | } |
1799 | ||
4b25d091 | 1800 | static void show_numstat(struct diffstat_t *data, struct diff_options *options) |
74e2abe5 JH |
1801 | { |
1802 | int i; | |
1803 | ||
f604652e JH |
1804 | if (data->nr == 0) |
1805 | return; | |
1806 | ||
74e2abe5 JH |
1807 | for (i = 0; i < data->nr; i++) { |
1808 | struct diffstat_file *file = data->files[i]; | |
1809 | ||
30997bb8 | 1810 | fprintf(options->file, "%s", diff_line_prefix(options)); |
7be57610 | 1811 | |
bfddbc5e | 1812 | if (file->is_binary) |
c0c77734 | 1813 | fprintf(options->file, "-\t-\t"); |
bfddbc5e | 1814 | else |
c0c77734 | 1815 | fprintf(options->file, |
0974c117 JK |
1816 | "%"PRIuMAX"\t%"PRIuMAX"\t", |
1817 | file->added, file->deleted); | |
f604652e JH |
1818 | if (options->line_termination) { |
1819 | fill_print_name(file); | |
1820 | if (!file->is_renamed) | |
c0c77734 | 1821 | write_name_quoted(file->name, options->file, |
f604652e JH |
1822 | options->line_termination); |
1823 | else { | |
c0c77734 DB |
1824 | fputs(file->print_name, options->file); |
1825 | putc(options->line_termination, options->file); | |
f604652e | 1826 | } |
663af342 | 1827 | } else { |
f604652e | 1828 | if (file->is_renamed) { |
c0c77734 DB |
1829 | putc('\0', options->file); |
1830 | write_name_quoted(file->from_name, options->file, '\0'); | |
f604652e | 1831 | } |
c0c77734 | 1832 | write_name_quoted(file->name, options->file, '\0'); |
663af342 | 1833 | } |
74e2abe5 JH |
1834 | } |
1835 | } | |
1836 | ||
c04a7155 JH |
1837 | struct dirstat_file { |
1838 | const char *name; | |
1839 | unsigned long changed; | |
7df7c019 LT |
1840 | }; |
1841 | ||
c04a7155 JH |
1842 | struct dirstat_dir { |
1843 | struct dirstat_file *files; | |
712d2c7d | 1844 | int alloc, nr, permille, cumulative; |
c04a7155 JH |
1845 | }; |
1846 | ||
7be57610 BY |
1847 | static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir, |
1848 | unsigned long changed, const char *base, int baselen) | |
7df7c019 LT |
1849 | { |
1850 | unsigned long this_dir = 0; | |
1851 | unsigned int sources = 0; | |
30997bb8 | 1852 | const char *line_prefix = diff_line_prefix(opt); |
7df7c019 LT |
1853 | |
1854 | while (dir->nr) { | |
c04a7155 | 1855 | struct dirstat_file *f = dir->files; |
7df7c019 LT |
1856 | int namelen = strlen(f->name); |
1857 | unsigned long this; | |
1858 | char *slash; | |
1859 | ||
1860 | if (namelen < baselen) | |
1861 | break; | |
1862 | if (memcmp(f->name, base, baselen)) | |
1863 | break; | |
1864 | slash = strchr(f->name + baselen, '/'); | |
1865 | if (slash) { | |
1866 | int newbaselen = slash + 1 - f->name; | |
7be57610 | 1867 | this = gather_dirstat(opt, dir, changed, f->name, newbaselen); |
7df7c019 LT |
1868 | sources++; |
1869 | } else { | |
c04a7155 | 1870 | this = f->changed; |
7df7c019 LT |
1871 | dir->files++; |
1872 | dir->nr--; | |
1873 | sources += 2; | |
1874 | } | |
1875 | this_dir += this; | |
1876 | } | |
1877 | ||
1878 | /* | |
1879 | * We don't report dirstat's for | |
1880 | * - the top level | |
1881 | * - or cases where everything came from a single directory | |
1882 | * under this directory (sources == 1). | |
1883 | */ | |
1884 | if (baselen && sources != 1) { | |
58a8756a JH |
1885 | if (this_dir) { |
1886 | int permille = this_dir * 1000 / changed; | |
712d2c7d | 1887 | if (permille >= dir->permille) { |
7be57610 | 1888 | fprintf(opt->file, "%s%4d.%01d%% %.*s\n", line_prefix, |
712d2c7d | 1889 | permille / 10, permille % 10, baselen, base); |
7df7c019 LT |
1890 | if (!dir->cumulative) |
1891 | return 0; | |
1892 | } | |
1893 | } | |
1894 | } | |
1895 | return this_dir; | |
1896 | } | |
1897 | ||
441bca0b LT |
1898 | static int dirstat_compare(const void *_a, const void *_b) |
1899 | { | |
1900 | const struct dirstat_file *a = _a; | |
1901 | const struct dirstat_file *b = _b; | |
1902 | return strcmp(a->name, b->name); | |
1903 | } | |
1904 | ||
c04a7155 | 1905 | static void show_dirstat(struct diff_options *options) |
7df7c019 LT |
1906 | { |
1907 | int i; | |
1908 | unsigned long changed; | |
c04a7155 JH |
1909 | struct dirstat_dir dir; |
1910 | struct diff_queue_struct *q = &diff_queued_diff; | |
1911 | ||
1912 | dir.files = NULL; | |
1913 | dir.alloc = 0; | |
1914 | dir.nr = 0; | |
712d2c7d | 1915 | dir.permille = options->dirstat_permille; |
f88d225f | 1916 | dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); |
7df7c019 | 1917 | |
7df7c019 | 1918 | changed = 0; |
c04a7155 JH |
1919 | for (i = 0; i < q->nr; i++) { |
1920 | struct diff_filepair *p = q->queue[i]; | |
1921 | const char *name; | |
1922 | unsigned long copied, added, damage; | |
0133dab7 | 1923 | int content_changed; |
c04a7155 | 1924 | |
2ca86714 | 1925 | name = p->two->path ? p->two->path : p->one->path; |
c04a7155 | 1926 | |
41c9560e | 1927 | if (p->one->oid_valid && p->two->oid_valid) |
a0d12c44 | 1928 | content_changed = oidcmp(&p->one->oid, &p->two->oid); |
0133dab7 JH |
1929 | else |
1930 | content_changed = 1; | |
1931 | ||
2ff3a803 JH |
1932 | if (!content_changed) { |
1933 | /* | |
1934 | * The SHA1 has not changed, so pre-/post-content is | |
1935 | * identical. We can therefore skip looking at the | |
1936 | * file contents altogether. | |
1937 | */ | |
1938 | damage = 0; | |
1939 | goto found_damage; | |
1940 | } | |
1941 | ||
0133dab7 JH |
1942 | if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE)) { |
1943 | /* | |
1944 | * In --dirstat-by-file mode, we don't really need to | |
1945 | * look at the actual file contents at all. | |
1946 | * The fact that the SHA1 changed is enough for us to | |
1947 | * add this file to the list of results | |
1948 | * (with each file contributing equal damage). | |
1949 | */ | |
2ff3a803 | 1950 | damage = 1; |
0133dab7 JH |
1951 | goto found_damage; |
1952 | } | |
c04a7155 JH |
1953 | |
1954 | if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) { | |
1955 | diff_populate_filespec(p->one, 0); | |
1956 | diff_populate_filespec(p->two, 0); | |
1957 | diffcore_count_changes(p->one, p->two, NULL, NULL, 0, | |
1958 | &copied, &added); | |
1959 | diff_free_filespec_data(p->one); | |
1960 | diff_free_filespec_data(p->two); | |
1961 | } else if (DIFF_FILE_VALID(p->one)) { | |
8e5dd3d6 | 1962 | diff_populate_filespec(p->one, CHECK_SIZE_ONLY); |
c04a7155 JH |
1963 | copied = added = 0; |
1964 | diff_free_filespec_data(p->one); | |
1965 | } else if (DIFF_FILE_VALID(p->two)) { | |
8e5dd3d6 | 1966 | diff_populate_filespec(p->two, CHECK_SIZE_ONLY); |
c04a7155 JH |
1967 | copied = 0; |
1968 | added = p->two->size; | |
1969 | diff_free_filespec_data(p->two); | |
1970 | } else | |
2b0b551d | 1971 | continue; |
c04a7155 JH |
1972 | |
1973 | /* | |
1974 | * Original minus copied is the removed material, | |
1975 | * added is the new material. They are both damages | |
0133dab7 | 1976 | * made to the preimage. |
2ff3a803 JH |
1977 | * If the resulting damage is zero, we know that |
1978 | * diffcore_count_changes() considers the two entries to | |
1979 | * be identical, but since content_changed is true, we | |
1980 | * know that there must have been _some_ kind of change, | |
1981 | * so we force all entries to have damage > 0. | |
c04a7155 JH |
1982 | */ |
1983 | damage = (p->one->size - copied) + added; | |
2ff3a803 | 1984 | if (!damage) |
fd33777b | 1985 | damage = 1; |
c04a7155 | 1986 | |
0133dab7 | 1987 | found_damage: |
c04a7155 JH |
1988 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); |
1989 | dir.files[dir.nr].name = name; | |
1990 | dir.files[dir.nr].changed = damage; | |
1991 | changed += damage; | |
1992 | dir.nr++; | |
7df7c019 LT |
1993 | } |
1994 | ||
1995 | /* This can happen even with many files, if everything was renames */ | |
1996 | if (!changed) | |
1997 | return; | |
1998 | ||
1999 | /* Show all directories with more than x% of the changes */ | |
441bca0b | 2000 | qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); |
7be57610 | 2001 | gather_dirstat(options, &dir, changed, "", 0); |
7df7c019 LT |
2002 | } |
2003 | ||
1c57a627 JH |
2004 | static void show_dirstat_by_line(struct diffstat_t *data, struct diff_options *options) |
2005 | { | |
2006 | int i; | |
2007 | unsigned long changed; | |
2008 | struct dirstat_dir dir; | |
2009 | ||
2010 | if (data->nr == 0) | |
2011 | return; | |
2012 | ||
2013 | dir.files = NULL; | |
2014 | dir.alloc = 0; | |
2015 | dir.nr = 0; | |
2016 | dir.permille = options->dirstat_permille; | |
2017 | dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); | |
2018 | ||
2019 | changed = 0; | |
2020 | for (i = 0; i < data->nr; i++) { | |
2021 | struct diffstat_file *file = data->files[i]; | |
2022 | unsigned long damage = file->added + file->deleted; | |
2023 | if (file->is_binary) | |
2024 | /* | |
2025 | * binary files counts bytes, not lines. Must find some | |
2026 | * way to normalize binary bytes vs. textual lines. | |
2027 | * The following heuristic assumes that there are 64 | |
2028 | * bytes per "line". | |
2029 | * This is stupid and ugly, but very cheap... | |
2030 | */ | |
2031 | damage = (damage + 63) / 64; | |
2032 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); | |
2033 | dir.files[dir.nr].name = file->name; | |
2034 | dir.files[dir.nr].changed = damage; | |
2035 | changed += damage; | |
2036 | dir.nr++; | |
2037 | } | |
2038 | ||
2039 | /* This can happen even with many files, if everything was renames */ | |
2040 | if (!changed) | |
2041 | return; | |
2042 | ||
2043 | /* Show all directories with more than x% of the changes */ | |
2044 | qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); | |
2045 | gather_dirstat(options, &dir, changed, "", 0); | |
2046 | } | |
2047 | ||
f604652e JH |
2048 | static void free_diffstat_info(struct diffstat_t *diffstat) |
2049 | { | |
2050 | int i; | |
2051 | for (i = 0; i < diffstat->nr; i++) { | |
2052 | struct diffstat_file *f = diffstat->files[i]; | |
2053 | if (f->name != f->print_name) | |
2054 | free(f->print_name); | |
2055 | free(f->name); | |
2056 | free(f->from_name); | |
2057 | free(f); | |
2058 | } | |
2059 | free(diffstat->files); | |
2060 | } | |
2061 | ||
88246898 | 2062 | struct checkdiff_t { |
88246898 | 2063 | const char *filename; |
1ba111d1 | 2064 | int lineno; |
a757c646 | 2065 | int conflict_marker_size; |
1ba111d1 | 2066 | struct diff_options *o; |
cf1b7869 | 2067 | unsigned ws_rule; |
62c64895 | 2068 | unsigned status; |
88246898 JS |
2069 | }; |
2070 | ||
a757c646 | 2071 | static int is_conflict_marker(const char *line, int marker_size, unsigned long len) |
04954043 JH |
2072 | { |
2073 | char firstchar; | |
2074 | int cnt; | |
2075 | ||
a757c646 | 2076 | if (len < marker_size + 1) |
04954043 JH |
2077 | return 0; |
2078 | firstchar = line[0]; | |
2079 | switch (firstchar) { | |
a757c646 | 2080 | case '=': case '>': case '<': case '|': |
04954043 JH |
2081 | break; |
2082 | default: | |
2083 | return 0; | |
2084 | } | |
a757c646 | 2085 | for (cnt = 1; cnt < marker_size; cnt++) |
04954043 JH |
2086 | if (line[cnt] != firstchar) |
2087 | return 0; | |
a757c646 JH |
2088 | /* line[1] thru line[marker_size-1] are same as firstchar */ |
2089 | if (len < marker_size + 1 || !isspace(line[marker_size])) | |
04954043 | 2090 | return 0; |
04954043 JH |
2091 | return 1; |
2092 | } | |
2093 | ||
88246898 JS |
2094 | static void checkdiff_consume(void *priv, char *line, unsigned long len) |
2095 | { | |
2096 | struct checkdiff_t *data = priv; | |
a757c646 | 2097 | int marker_size = data->conflict_marker_size; |
f1c96261 JK |
2098 | const char *ws = diff_get_color(data->o->use_color, DIFF_WHITESPACE); |
2099 | const char *reset = diff_get_color(data->o->use_color, DIFF_RESET); | |
2100 | const char *set = diff_get_color(data->o->use_color, DIFF_FILE_NEW); | |
c1795bb0 | 2101 | char *err; |
30997bb8 | 2102 | const char *line_prefix; |
7be57610 BY |
2103 | |
2104 | assert(data->o); | |
30997bb8 | 2105 | line_prefix = diff_line_prefix(data->o); |
88246898 JS |
2106 | |
2107 | if (line[0] == '+') { | |
18374e58 | 2108 | unsigned bad; |
0ef617f4 | 2109 | data->lineno++; |
a757c646 | 2110 | if (is_conflict_marker(line + 1, marker_size, len - 1)) { |
04954043 JH |
2111 | data->status |= 1; |
2112 | fprintf(data->o->file, | |
7be57610 BY |
2113 | "%s%s:%d: leftover conflict marker\n", |
2114 | line_prefix, data->filename, data->lineno); | |
04954043 | 2115 | } |
8f8841e9 | 2116 | bad = ws_check(line + 1, len - 1, data->ws_rule); |
18374e58 | 2117 | if (!bad) |
c1795bb0 | 2118 | return; |
18374e58 JH |
2119 | data->status |= bad; |
2120 | err = whitespace_error_string(bad); | |
7be57610 BY |
2121 | fprintf(data->o->file, "%s%s:%d: %s.\n", |
2122 | line_prefix, data->filename, data->lineno, err); | |
c1795bb0 | 2123 | free(err); |
a3c158d4 | 2124 | emit_line(data->o, set, reset, line, 1); |
8f8841e9 | 2125 | ws_check_emit(line + 1, len - 1, data->ws_rule, |
1ba111d1 | 2126 | data->o->file, set, reset, ws); |
877f23cc | 2127 | } else if (line[0] == ' ') { |
88246898 | 2128 | data->lineno++; |
877f23cc | 2129 | } else if (line[0] == '@') { |
88246898 JS |
2130 | char *plus = strchr(line, '+'); |
2131 | if (plus) | |
0ef617f4 | 2132 | data->lineno = strtol(plus, NULL, 10) - 1; |
88246898 JS |
2133 | else |
2134 | die("invalid diff"); | |
2135 | } | |
2136 | } | |
2137 | ||
0660626c JH |
2138 | static unsigned char *deflate_it(char *data, |
2139 | unsigned long size, | |
2140 | unsigned long *result_size) | |
051308f6 | 2141 | { |
0660626c JH |
2142 | int bound; |
2143 | unsigned char *deflated; | |
ef49a7a0 | 2144 | git_zstream stream; |
0660626c | 2145 | |
55bb5c91 | 2146 | git_deflate_init(&stream, zlib_compression_level); |
225a6f10 | 2147 | bound = git_deflate_bound(&stream, size); |
0660626c JH |
2148 | deflated = xmalloc(bound); |
2149 | stream.next_out = deflated; | |
2150 | stream.avail_out = bound; | |
2151 | ||
2152 | stream.next_in = (unsigned char *)data; | |
2153 | stream.avail_in = size; | |
55bb5c91 | 2154 | while (git_deflate(&stream, Z_FINISH) == Z_OK) |
0660626c | 2155 | ; /* nothing */ |
55bb5c91 | 2156 | git_deflate_end(&stream); |
0660626c JH |
2157 | *result_size = stream.total_out; |
2158 | return deflated; | |
051308f6 JH |
2159 | } |
2160 | ||
32b367e4 JK |
2161 | static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two, |
2162 | const char *prefix) | |
051308f6 | 2163 | { |
0660626c JH |
2164 | void *cp; |
2165 | void *delta; | |
2166 | void *deflated; | |
2167 | void *data; | |
2168 | unsigned long orig_size; | |
2169 | unsigned long delta_size; | |
2170 | unsigned long deflate_size; | |
2171 | unsigned long data_size; | |
051308f6 | 2172 | |
0660626c JH |
2173 | /* We could do deflated delta, or we could do just deflated two, |
2174 | * whichever is smaller. | |
051308f6 | 2175 | */ |
0660626c JH |
2176 | delta = NULL; |
2177 | deflated = deflate_it(two->ptr, two->size, &deflate_size); | |
2178 | if (one->size && two->size) { | |
2179 | delta = diff_delta(one->ptr, one->size, | |
2180 | two->ptr, two->size, | |
2181 | &delta_size, deflate_size); | |
2182 | if (delta) { | |
2183 | void *to_free = delta; | |
2184 | orig_size = delta_size; | |
2185 | delta = deflate_it(delta, delta_size, &delta_size); | |
2186 | free(to_free); | |
051308f6 JH |
2187 | } |
2188 | } | |
051308f6 | 2189 | |
0660626c | 2190 | if (delta && delta_size < deflate_size) { |
7be57610 | 2191 | fprintf(file, "%sdelta %lu\n", prefix, orig_size); |
0660626c JH |
2192 | free(deflated); |
2193 | data = delta; | |
2194 | data_size = delta_size; | |
2195 | } | |
2196 | else { | |
7be57610 | 2197 | fprintf(file, "%sliteral %lu\n", prefix, two->size); |
0660626c JH |
2198 | free(delta); |
2199 | data = deflated; | |
2200 | data_size = deflate_size; | |
2201 | } | |
051308f6 | 2202 | |
0660626c JH |
2203 | /* emit data encoded in base85 */ |
2204 | cp = data; | |
2205 | while (data_size) { | |
2206 | int bytes = (52 < data_size) ? 52 : data_size; | |
051308f6 | 2207 | char line[70]; |
0660626c | 2208 | data_size -= bytes; |
051308f6 JH |
2209 | if (bytes <= 26) |
2210 | line[0] = bytes + 'A' - 1; | |
2211 | else | |
2212 | line[0] = bytes - 26 + 'a' - 1; | |
2213 | encode_85(line + 1, cp, bytes); | |
1d7f171c | 2214 | cp = (char *) cp + bytes; |
7be57610 | 2215 | fprintf(file, "%s", prefix); |
c0c77734 DB |
2216 | fputs(line, file); |
2217 | fputc('\n', file); | |
051308f6 | 2218 | } |
7be57610 | 2219 | fprintf(file, "%s\n", prefix); |
0660626c | 2220 | free(data); |
051308f6 JH |
2221 | } |
2222 | ||
32b367e4 JK |
2223 | static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two, |
2224 | const char *prefix) | |
d4c452f0 | 2225 | { |
7be57610 BY |
2226 | fprintf(file, "%sGIT binary patch\n", prefix); |
2227 | emit_binary_diff_body(file, one, two, prefix); | |
2228 | emit_binary_diff_body(file, two, one, prefix); | |
d4c452f0 JH |
2229 | } |
2230 | ||
29a3eefd JH |
2231 | int diff_filespec_is_binary(struct diff_filespec *one) |
2232 | { | |
122aa6f9 JK |
2233 | if (one->is_binary == -1) { |
2234 | diff_filespec_load_driver(one); | |
2235 | if (one->driver->binary != -1) | |
2236 | one->is_binary = one->driver->binary; | |
2237 | else { | |
2238 | if (!one->data && DIFF_FILE_VALID(one)) | |
6bf3b813 NTND |
2239 | diff_populate_filespec(one, CHECK_BINARY); |
2240 | if (one->is_binary == -1 && one->data) | |
122aa6f9 JK |
2241 | one->is_binary = buffer_is_binary(one->data, |
2242 | one->size); | |
2243 | if (one->is_binary == -1) | |
2244 | one->is_binary = 0; | |
2245 | } | |
2246 | } | |
29a3eefd | 2247 | return one->is_binary; |
6973dcae JH |
2248 | } |
2249 | ||
be58e70d | 2250 | static const struct userdiff_funcname *diff_funcname_pattern(struct diff_filespec *one) |
f258475a | 2251 | { |
122aa6f9 JK |
2252 | diff_filespec_load_driver(one); |
2253 | return one->driver->funcname.pattern ? &one->driver->funcname : NULL; | |
f258475a JH |
2254 | } |
2255 | ||
a5a818ee JH |
2256 | void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b) |
2257 | { | |
2258 | if (!options->a_prefix) | |
2259 | options->a_prefix = a; | |
2260 | if (!options->b_prefix) | |
2261 | options->b_prefix = b; | |
2262 | } | |
2263 | ||
a788d7d5 | 2264 | struct userdiff_driver *get_textconv(struct diff_filespec *one) |
04427ac8 JK |
2265 | { |
2266 | if (!DIFF_FILE_VALID(one)) | |
2267 | return NULL; | |
d391c0ff | 2268 | |
04427ac8 | 2269 | diff_filespec_load_driver(one); |
3813e690 | 2270 | return userdiff_get_textconv(one->driver); |
04427ac8 JK |
2271 | } |
2272 | ||
6973dcae JH |
2273 | static void builtin_diff(const char *name_a, |
2274 | const char *name_b, | |
2275 | struct diff_filespec *one, | |
2276 | struct diff_filespec *two, | |
2277 | const char *xfrm_msg, | |
296c6bb2 | 2278 | int must_show_header, |
051308f6 | 2279 | struct diff_options *o, |
6973dcae JH |
2280 | int complete_rewrite) |
2281 | { | |
2282 | mmfile_t mf1, mf2; | |
2283 | const char *lbl[2]; | |
2284 | char *a_one, *b_two; | |
d9c552f1 | 2285 | const char *meta = diff_get_color_opt(o, DIFF_METAINFO); |
8f67f8ae | 2286 | const char *reset = diff_get_color_opt(o, DIFF_RESET); |
a5a818ee | 2287 | const char *a_prefix, *b_prefix; |
d9bae1a1 JK |
2288 | struct userdiff_driver *textconv_one = NULL; |
2289 | struct userdiff_driver *textconv_two = NULL; | |
3e97c7c6 | 2290 | struct strbuf header = STRBUF_INIT; |
30997bb8 | 2291 | const char *line_prefix = diff_line_prefix(o); |
a5a818ee | 2292 | |
752c0c24 JS |
2293 | if (DIFF_OPT_TST(o, SUBMODULE_LOG) && |
2294 | (!one->mode || S_ISGITLINK(one->mode)) && | |
2295 | (!two->mode || S_ISGITLINK(two->mode))) { | |
2296 | const char *del = diff_get_color_opt(o, DIFF_FILE_OLD); | |
2297 | const char *add = diff_get_color_opt(o, DIFF_FILE_NEW); | |
3b0c18af | 2298 | show_submodule_summary(o->file, one->path ? one->path : two->path, |
0f33a067 | 2299 | line_prefix, |
a0d12c44 | 2300 | one->oid.hash, two->oid.hash, |
2301 | two->dirty_submodule, | |
4e215131 | 2302 | meta, del, add, reset); |
752c0c24 JS |
2303 | return; |
2304 | } | |
2305 | ||
3aa1f7ca JK |
2306 | if (DIFF_OPT_TST(o, ALLOW_TEXTCONV)) { |
2307 | textconv_one = get_textconv(one); | |
2308 | textconv_two = get_textconv(two); | |
2309 | } | |
2310 | ||
a5a818ee JH |
2311 | diff_set_mnemonic_prefix(o, "a/", "b/"); |
2312 | if (DIFF_OPT_TST(o, REVERSE_DIFF)) { | |
2313 | a_prefix = o->b_prefix; | |
2314 | b_prefix = o->a_prefix; | |
2315 | } else { | |
2316 | a_prefix = o->a_prefix; | |
2317 | b_prefix = o->b_prefix; | |
2318 | } | |
6973dcae | 2319 | |
71b989e7 LT |
2320 | /* Never use a non-valid filename anywhere if at all possible */ |
2321 | name_a = DIFF_FILE_VALID(one) ? name_a : name_b; | |
2322 | name_b = DIFF_FILE_VALID(two) ? name_b : name_a; | |
2323 | ||
a5a818ee JH |
2324 | a_one = quote_two(a_prefix, name_a + (*name_a == '/')); |
2325 | b_two = quote_two(b_prefix, name_b + (*name_b == '/')); | |
6973dcae JH |
2326 | lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; |
2327 | lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; | |
d9c552f1 | 2328 | strbuf_addf(&header, "%s%sdiff --git %s %s%s\n", line_prefix, meta, a_one, b_two, reset); |
6973dcae JH |
2329 | if (lbl[0][0] == '/') { |
2330 | /* /dev/null */ | |
d9c552f1 | 2331 | strbuf_addf(&header, "%s%snew file mode %06o%s\n", line_prefix, meta, two->mode, reset); |
37466447 BW |
2332 | if (xfrm_msg) |
2333 | strbuf_addstr(&header, xfrm_msg); | |
296c6bb2 | 2334 | must_show_header = 1; |
6973dcae JH |
2335 | } |
2336 | else if (lbl[1][0] == '/') { | |
d9c552f1 | 2337 | strbuf_addf(&header, "%s%sdeleted file mode %06o%s\n", line_prefix, meta, one->mode, reset); |
37466447 BW |
2338 | if (xfrm_msg) |
2339 | strbuf_addstr(&header, xfrm_msg); | |
296c6bb2 | 2340 | must_show_header = 1; |
6973dcae JH |
2341 | } |
2342 | else { | |
2343 | if (one->mode != two->mode) { | |
d9c552f1 JK |
2344 | strbuf_addf(&header, "%s%sold mode %06o%s\n", line_prefix, meta, one->mode, reset); |
2345 | strbuf_addf(&header, "%s%snew mode %06o%s\n", line_prefix, meta, two->mode, reset); | |
296c6bb2 | 2346 | must_show_header = 1; |
cd112cef | 2347 | } |
37466447 BW |
2348 | if (xfrm_msg) |
2349 | strbuf_addstr(&header, xfrm_msg); | |
3e97c7c6 | 2350 | |
6973dcae JH |
2351 | /* |
2352 | * we do not run diff between different kind | |
2353 | * of objects. | |
2354 | */ | |
2355 | if ((one->mode ^ two->mode) & S_IFMT) | |
2356 | goto free_ab_and_return; | |
0c01857d | 2357 | if (complete_rewrite && |
3aa1f7ca JK |
2358 | (textconv_one || !diff_filespec_is_binary(one)) && |
2359 | (textconv_two || !diff_filespec_is_binary(two))) { | |
3e97c7c6 GB |
2360 | fprintf(o->file, "%s", header.buf); |
2361 | strbuf_reset(&header); | |
3aa1f7ca JK |
2362 | emit_rewrite_diff(name_a, name_b, one, two, |
2363 | textconv_one, textconv_two, o); | |
34a5e1a2 | 2364 | o->found_changes = 1; |
6973dcae JH |
2365 | goto free_ab_and_return; |
2366 | } | |
2367 | } | |
2368 | ||
467ddc14 JH |
2369 | if (o->irreversible_delete && lbl[1][0] == '/') { |
2370 | fprintf(o->file, "%s", header.buf); | |
2371 | strbuf_reset(&header); | |
2372 | goto free_ab_and_return; | |
2373 | } else if (!DIFF_OPT_TST(o, TEXT) && | |
b3373982 JK |
2374 | ( (!textconv_one && diff_filespec_is_binary(one)) || |
2375 | (!textconv_two && diff_filespec_is_binary(two)) )) { | |
1aaf69e6 NTND |
2376 | if (!one->data && !two->data && |
2377 | S_ISREG(one->mode) && S_ISREG(two->mode) && | |
2378 | !DIFF_OPT_TST(o, BINARY)) { | |
a0d12c44 | 2379 | if (!oidcmp(&one->oid, &two->oid)) { |
1aaf69e6 NTND |
2380 | if (must_show_header) |
2381 | fprintf(o->file, "%s", header.buf); | |
2382 | goto free_ab_and_return; | |
2383 | } | |
2384 | fprintf(o->file, "%s", header.buf); | |
2385 | fprintf(o->file, "%sBinary files %s and %s differ\n", | |
2386 | line_prefix, lbl[0], lbl[1]); | |
2387 | goto free_ab_and_return; | |
2388 | } | |
b3373982 JK |
2389 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) |
2390 | die("unable to read files to diff"); | |
0660626c JH |
2391 | /* Quite common confusing case */ |
2392 | if (mf1.size == mf2.size && | |
296c6bb2 CC |
2393 | !memcmp(mf1.ptr, mf2.ptr, mf1.size)) { |
2394 | if (must_show_header) | |
2395 | fprintf(o->file, "%s", header.buf); | |
0660626c | 2396 | goto free_ab_and_return; |
296c6bb2 | 2397 | } |
3e97c7c6 GB |
2398 | fprintf(o->file, "%s", header.buf); |
2399 | strbuf_reset(&header); | |
8f67f8ae | 2400 | if (DIFF_OPT_TST(o, BINARY)) |
7be57610 | 2401 | emit_binary_diff(o->file, &mf1, &mf2, line_prefix); |
051308f6 | 2402 | else |
7be57610 BY |
2403 | fprintf(o->file, "%sBinary files %s and %s differ\n", |
2404 | line_prefix, lbl[0], lbl[1]); | |
34a5e1a2 | 2405 | o->found_changes = 1; |
467ddc14 | 2406 | } else { |
6973dcae JH |
2407 | /* Crazy xdl interfaces.. */ |
2408 | const char *diffopts = getenv("GIT_DIFF_OPTS"); | |
ae021d87 | 2409 | const char *v; |
6973dcae JH |
2410 | xpparam_t xpp; |
2411 | xdemitconf_t xecfg; | |
6973dcae | 2412 | struct emit_callback ecbdata; |
be58e70d | 2413 | const struct userdiff_funcname *pe; |
f258475a | 2414 | |
b3f01ff2 | 2415 | if (must_show_header) { |
3e97c7c6 GB |
2416 | fprintf(o->file, "%s", header.buf); |
2417 | strbuf_reset(&header); | |
2418 | } | |
2419 | ||
840383b2 JK |
2420 | mf1.size = fill_textconv(textconv_one, one, &mf1.ptr); |
2421 | mf2.size = fill_textconv(textconv_two, two, &mf2.ptr); | |
04427ac8 | 2422 | |
45e7ca0f BC |
2423 | pe = diff_funcname_pattern(one); |
2424 | if (!pe) | |
2425 | pe = diff_funcname_pattern(two); | |
6973dcae | 2426 | |
9ccd0a88 | 2427 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2428 | memset(&xecfg, 0, sizeof(xecfg)); |
cd112cef | 2429 | memset(&ecbdata, 0, sizeof(ecbdata)); |
6973dcae | 2430 | ecbdata.label_path = lbl; |
daa0c3d9 | 2431 | ecbdata.color_diff = want_color(o->use_color); |
c189c4f2 | 2432 | ecbdata.ws_rule = whitespace_rule(name_b); |
690ed843 | 2433 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) |
d68fe26f | 2434 | check_blank_at_eof(&mf1, &mf2, &ecbdata); |
a3c158d4 | 2435 | ecbdata.opt = o; |
3e97c7c6 | 2436 | ecbdata.header = header.len ? &header : NULL; |
582aa00b | 2437 | xpp.flags = o->xdl_opts; |
ee1e5412 | 2438 | xecfg.ctxlen = o->context; |
6d0e674a | 2439 | xecfg.interhunkctxlen = o->interhunkcontext; |
6973dcae | 2440 | xecfg.flags = XDL_EMIT_FUNCNAMES; |
14937c2c RS |
2441 | if (DIFF_OPT_TST(o, FUNCCONTEXT)) |
2442 | xecfg.flags |= XDL_EMIT_FUNCCONTEXT; | |
45e7ca0f | 2443 | if (pe) |
a013585b | 2444 | xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags); |
6973dcae JH |
2445 | if (!diffopts) |
2446 | ; | |
ae021d87 JK |
2447 | else if (skip_prefix(diffopts, "--unified=", &v)) |
2448 | xecfg.ctxlen = strtoul(v, NULL, 10); | |
2449 | else if (skip_prefix(diffopts, "-u", &v)) | |
2450 | xecfg.ctxlen = strtoul(v, NULL, 10); | |
77d1a520 TR |
2451 | if (o->word_diff) |
2452 | init_diff_words_data(&ecbdata, o, one, two); | |
3efb9880 JK |
2453 | if (xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata, |
2454 | &xpp, &xecfg)) | |
2455 | die("unable to generate diff for %s", one->path); | |
882749a0 | 2456 | if (o->word_diff) |
f59a59e2 | 2457 | free_diff_words_data(&ecbdata); |
04427ac8 JK |
2458 | if (textconv_one) |
2459 | free(mf1.ptr); | |
2460 | if (textconv_two) | |
2461 | free(mf2.ptr); | |
8cfe5f1c | 2462 | xdiff_clear_find_func(&xecfg); |
6973dcae JH |
2463 | } |
2464 | ||
2465 | free_ab_and_return: | |
3e97c7c6 | 2466 | strbuf_release(&header); |
fc3abdf5 JH |
2467 | diff_free_filespec_data(one); |
2468 | diff_free_filespec_data(two); | |
6973dcae JH |
2469 | free(a_one); |
2470 | free(b_two); | |
2471 | return; | |
2472 | } | |
2473 | ||
2474 | static void builtin_diffstat(const char *name_a, const char *name_b, | |
2475 | struct diff_filespec *one, | |
2476 | struct diff_filespec *two, | |
710158e3 | 2477 | struct diffstat_t *diffstat, |
0d21efa5 | 2478 | struct diff_options *o, |
74faaa16 | 2479 | struct diff_filepair *p) |
6973dcae JH |
2480 | { |
2481 | mmfile_t mf1, mf2; | |
2482 | struct diffstat_file *data; | |
352ca4e1 | 2483 | int same_contents; |
74faaa16 LT |
2484 | int complete_rewrite = 0; |
2485 | ||
2486 | if (!DIFF_PAIR_UNMERGED(p)) { | |
2487 | if (p->status == DIFF_STATUS_MODIFIED && p->score) | |
2488 | complete_rewrite = 1; | |
2489 | } | |
6973dcae JH |
2490 | |
2491 | data = diffstat_add(diffstat, name_a, name_b); | |
99bfd407 | 2492 | data->is_interesting = p->status != DIFF_STATUS_UNKNOWN; |
6973dcae JH |
2493 | |
2494 | if (!one || !two) { | |
2495 | data->is_unmerged = 1; | |
2496 | return; | |
2497 | } | |
ded0abc7 | 2498 | |
a0d12c44 | 2499 | same_contents = !oidcmp(&one->oid, &two->oid); |
352ca4e1 | 2500 | |
ded0abc7 | 2501 | if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) { |
ded0abc7 | 2502 | data->is_binary = 1; |
352ca4e1 | 2503 | if (same_contents) { |
e18872b2 ZJS |
2504 | data->added = 0; |
2505 | data->deleted = 0; | |
2506 | } else { | |
2507 | data->added = diff_filespec_size(two); | |
2508 | data->deleted = diff_filespec_size(one); | |
2509 | } | |
ded0abc7 JK |
2510 | } |
2511 | ||
2512 | else if (complete_rewrite) { | |
710158e3 JH |
2513 | diff_populate_filespec(one, 0); |
2514 | diff_populate_filespec(two, 0); | |
2515 | data->deleted = count_lines(one->data, one->size); | |
2516 | data->added = count_lines(two->data, two->size); | |
710158e3 | 2517 | } |
6973dcae | 2518 | |
352ca4e1 | 2519 | else if (!same_contents) { |
6973dcae JH |
2520 | /* Crazy xdl interfaces.. */ |
2521 | xpparam_t xpp; | |
2522 | xdemitconf_t xecfg; | |
6973dcae | 2523 | |
ded0abc7 JK |
2524 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) |
2525 | die("unable to read files to diff"); | |
2526 | ||
9ccd0a88 | 2527 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2528 | memset(&xecfg, 0, sizeof(xecfg)); |
582aa00b | 2529 | xpp.flags = o->xdl_opts; |
f01cae91 JH |
2530 | xecfg.ctxlen = o->context; |
2531 | xecfg.interhunkctxlen = o->interhunkcontext; | |
3efb9880 JK |
2532 | if (xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat, |
2533 | &xpp, &xecfg)) | |
2534 | die("unable to generate diffstat for %s", one->path); | |
6973dcae | 2535 | } |
fc3abdf5 | 2536 | |
fc3abdf5 JH |
2537 | diff_free_filespec_data(one); |
2538 | diff_free_filespec_data(two); | |
6973dcae JH |
2539 | } |
2540 | ||
88246898 | 2541 | static void builtin_checkdiff(const char *name_a, const char *name_b, |
cd676a51 | 2542 | const char *attr_path, |
5ff10dd6 JH |
2543 | struct diff_filespec *one, |
2544 | struct diff_filespec *two, | |
2545 | struct diff_options *o) | |
88246898 JS |
2546 | { |
2547 | mmfile_t mf1, mf2; | |
2548 | struct checkdiff_t data; | |
2549 | ||
2550 | if (!two) | |
2551 | return; | |
2552 | ||
2553 | memset(&data, 0, sizeof(data)); | |
88246898 JS |
2554 | data.filename = name_b ? name_b : name_a; |
2555 | data.lineno = 0; | |
1ba111d1 | 2556 | data.o = o; |
cd676a51 | 2557 | data.ws_rule = whitespace_rule(attr_path); |
a757c646 | 2558 | data.conflict_marker_size = ll_merge_marker_size(attr_path); |
88246898 JS |
2559 | |
2560 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
2561 | die("unable to read files to diff"); | |
2562 | ||
5ff10dd6 JH |
2563 | /* |
2564 | * All the other codepaths check both sides, but not checking | |
2565 | * the "old" side here is deliberate. We are checking the newly | |
2566 | * introduced changes, and as long as the "new" side is text, we | |
2567 | * can and should check what it introduces. | |
2568 | */ | |
29a3eefd | 2569 | if (diff_filespec_is_binary(two)) |
fc3abdf5 | 2570 | goto free_and_return; |
88246898 JS |
2571 | else { |
2572 | /* Crazy xdl interfaces.. */ | |
2573 | xpparam_t xpp; | |
2574 | xdemitconf_t xecfg; | |
88246898 | 2575 | |
9ccd0a88 | 2576 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2577 | memset(&xecfg, 0, sizeof(xecfg)); |
c35539eb | 2578 | xecfg.ctxlen = 1; /* at least one context line */ |
582aa00b | 2579 | xpp.flags = 0; |
3efb9880 JK |
2580 | if (xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data, |
2581 | &xpp, &xecfg)) | |
2582 | die("unable to generate checkdiff for %s", one->path); | |
877f23cc | 2583 | |
467babf8 | 2584 | if (data.ws_rule & WS_BLANK_AT_EOF) { |
d68fe26f JH |
2585 | struct emit_callback ecbdata; |
2586 | int blank_at_eof; | |
2587 | ||
2588 | ecbdata.ws_rule = data.ws_rule; | |
2589 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
8837d335 | 2590 | blank_at_eof = ecbdata.blank_at_eof_in_postimage; |
d68fe26f | 2591 | |
467babf8 JH |
2592 | if (blank_at_eof) { |
2593 | static char *err; | |
2594 | if (!err) | |
2595 | err = whitespace_error_string(WS_BLANK_AT_EOF); | |
2596 | fprintf(o->file, "%s:%d: %s.\n", | |
2597 | data.filename, blank_at_eof, err); | |
2598 | data.status = 1; /* report errors */ | |
2599 | } | |
877f23cc | 2600 | } |
88246898 | 2601 | } |
fc3abdf5 JH |
2602 | free_and_return: |
2603 | diff_free_filespec_data(one); | |
2604 | diff_free_filespec_data(two); | |
62c64895 WC |
2605 | if (data.status) |
2606 | DIFF_OPT_SET(o, CHECK_FAILED); | |
88246898 JS |
2607 | } |
2608 | ||
6973dcae JH |
2609 | struct diff_filespec *alloc_filespec(const char *path) |
2610 | { | |
96ffc06f | 2611 | struct diff_filespec *spec; |
6973dcae | 2612 | |
96ffc06f | 2613 | FLEXPTR_ALLOC_STR(spec, path, path); |
9fb88419 | 2614 | spec->count = 1; |
122aa6f9 | 2615 | spec->is_binary = -1; |
6973dcae JH |
2616 | return spec; |
2617 | } | |
2618 | ||
9fb88419 LT |
2619 | void free_filespec(struct diff_filespec *spec) |
2620 | { | |
2621 | if (!--spec->count) { | |
2622 | diff_free_filespec_data(spec); | |
2623 | free(spec); | |
2624 | } | |
2625 | } | |
2626 | ||
6973dcae | 2627 | void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1, |
e5450100 | 2628 | int sha1_valid, unsigned short mode) |
6973dcae JH |
2629 | { |
2630 | if (mode) { | |
2631 | spec->mode = canon_mode(mode); | |
a0d12c44 | 2632 | hashcpy(spec->oid.hash, sha1); |
41c9560e | 2633 | spec->oid_valid = sha1_valid; |
6973dcae JH |
2634 | } |
2635 | } | |
2636 | ||
2637 | /* | |
5adf317b | 2638 | * Given a name and sha1 pair, if the index tells us the file in |
6973dcae JH |
2639 | * the work tree has that object contents, return true, so that |
2640 | * prepare_temp_file() does not have to inflate and extract. | |
2641 | */ | |
1510fea7 | 2642 | static int reuse_worktree_file(const char *name, const unsigned char *sha1, int want_file) |
6973dcae | 2643 | { |
9c5e6c80 | 2644 | const struct cache_entry *ce; |
6973dcae JH |
2645 | struct stat st; |
2646 | int pos, len; | |
2647 | ||
150115ad JH |
2648 | /* |
2649 | * We do not read the cache ourselves here, because the | |
6973dcae JH |
2650 | * benchmark with my previous version that always reads cache |
2651 | * shows that it makes things worse for diff-tree comparing | |
2652 | * two linux-2.6 kernel trees in an already checked out work | |
2653 | * tree. This is because most diff-tree comparisons deal with | |
2654 | * only a small number of files, while reading the cache is | |
2655 | * expensive for a large project, and its cost outweighs the | |
2656 | * savings we get by not inflating the object to a temporary | |
2657 | * file. Practically, this code only helps when we are used | |
2658 | * by diff-cache --cached, which does read the cache before | |
2659 | * calling us. | |
2660 | */ | |
2661 | if (!active_cache) | |
2662 | return 0; | |
2663 | ||
1510fea7 SP |
2664 | /* We want to avoid the working directory if our caller |
2665 | * doesn't need the data in a normal file, this system | |
2666 | * is rather slow with its stat/open/mmap/close syscalls, | |
2667 | * and the object is contained in a pack file. The pack | |
2668 | * is probably already open and will be faster to obtain | |
2669 | * the data through than the working directory. Loose | |
2670 | * objects however would tend to be slower as they need | |
2671 | * to be individually opened and inflated. | |
2672 | */ | |
cd673c1f | 2673 | if (!FAST_WORKING_DIRECTORY && !want_file && has_sha1_pack(sha1)) |
1510fea7 SP |
2674 | return 0; |
2675 | ||
06dec439 JK |
2676 | /* |
2677 | * Similarly, if we'd have to convert the file contents anyway, that | |
2678 | * makes the optimization not worthwhile. | |
2679 | */ | |
2680 | if (!want_file && would_convert_to_git(name)) | |
2681 | return 0; | |
2682 | ||
6973dcae JH |
2683 | len = strlen(name); |
2684 | pos = cache_name_pos(name, len); | |
2685 | if (pos < 0) | |
2686 | return 0; | |
2687 | ce = active_cache[pos]; | |
eadb5831 JH |
2688 | |
2689 | /* | |
2690 | * This is not the sha1 we are looking for, or | |
2691 | * unreusable because it is not a regular file. | |
2692 | */ | |
2693 | if (hashcmp(sha1, ce->sha1) || !S_ISREG(ce->ce_mode)) | |
6973dcae | 2694 | return 0; |
eadb5831 | 2695 | |
150115ad JH |
2696 | /* |
2697 | * If ce is marked as "assume unchanged", there is no | |
2698 | * guarantee that work tree matches what we are looking for. | |
2699 | */ | |
b4d1690d | 2700 | if ((ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) |
150115ad JH |
2701 | return 0; |
2702 | ||
eadb5831 JH |
2703 | /* |
2704 | * If ce matches the file in the work tree, we can reuse it. | |
6973dcae | 2705 | */ |
eadb5831 JH |
2706 | if (ce_uptodate(ce) || |
2707 | (!lstat(name, &st) && !ce_match_stat(ce, &st, 0))) | |
2708 | return 1; | |
2709 | ||
2710 | return 0; | |
6973dcae JH |
2711 | } |
2712 | ||
04786756 LT |
2713 | static int diff_populate_gitlink(struct diff_filespec *s, int size_only) |
2714 | { | |
b1ddfb91 JK |
2715 | struct strbuf buf = STRBUF_INIT; |
2716 | char *dirty = ""; | |
8e08b419 JH |
2717 | |
2718 | /* Are we looking at the work tree? */ | |
85adbf2f | 2719 | if (s->dirty_submodule) |
8e08b419 JH |
2720 | dirty = "-dirty"; |
2721 | ||
a0d12c44 | 2722 | strbuf_addf(&buf, "Subproject commit %s%s\n", |
2723 | oid_to_hex(&s->oid), dirty); | |
b1ddfb91 | 2724 | s->size = buf.len; |
04786756 LT |
2725 | if (size_only) { |
2726 | s->data = NULL; | |
b1ddfb91 JK |
2727 | strbuf_release(&buf); |
2728 | } else { | |
2729 | s->data = strbuf_detach(&buf, NULL); | |
2730 | s->should_free = 1; | |
04786756 LT |
2731 | } |
2732 | return 0; | |
2733 | } | |
2734 | ||
6973dcae JH |
2735 | /* |
2736 | * While doing rename detection and pickaxe operation, we may need to | |
2737 | * grab the data for the blob (or file) for our own in-core comparison. | |
2738 | * diff_filespec has data and size fields for this purpose. | |
2739 | */ | |
8e5dd3d6 | 2740 | int diff_populate_filespec(struct diff_filespec *s, unsigned int flags) |
6973dcae | 2741 | { |
8e5dd3d6 | 2742 | int size_only = flags & CHECK_SIZE_ONLY; |
6973dcae | 2743 | int err = 0; |
5430bb28 JH |
2744 | /* |
2745 | * demote FAIL to WARN to allow inspecting the situation | |
2746 | * instead of refusing. | |
2747 | */ | |
2748 | enum safe_crlf crlf_warn = (safe_crlf == SAFE_CRLF_FAIL | |
2749 | ? SAFE_CRLF_WARN | |
2750 | : safe_crlf); | |
2751 | ||
6973dcae JH |
2752 | if (!DIFF_FILE_VALID(s)) |
2753 | die("internal error: asking to populate invalid file."); | |
2754 | if (S_ISDIR(s->mode)) | |
2755 | return -1; | |
2756 | ||
6973dcae | 2757 | if (s->data) |
fc3abdf5 | 2758 | return 0; |
04786756 | 2759 | |
6e0b8ed6 JH |
2760 | if (size_only && 0 < s->size) |
2761 | return 0; | |
2762 | ||
302b9282 | 2763 | if (S_ISGITLINK(s->mode)) |
04786756 LT |
2764 | return diff_populate_gitlink(s, size_only); |
2765 | ||
41c9560e | 2766 | if (!s->oid_valid || |
a0d12c44 | 2767 | reuse_worktree_file(s->path, s->oid.hash, 0)) { |
f285a2d7 | 2768 | struct strbuf buf = STRBUF_INIT; |
6973dcae JH |
2769 | struct stat st; |
2770 | int fd; | |
6c510bee | 2771 | |
6973dcae JH |
2772 | if (lstat(s->path, &st) < 0) { |
2773 | if (errno == ENOENT) { | |
2774 | err_empty: | |
2775 | err = -1; | |
2776 | empty: | |
d2543b8e | 2777 | s->data = (char *)""; |
6973dcae JH |
2778 | s->size = 0; |
2779 | return err; | |
2780 | } | |
2781 | } | |
dc49cd76 | 2782 | s->size = xsize_t(st.st_size); |
6973dcae JH |
2783 | if (!s->size) |
2784 | goto empty; | |
6973dcae | 2785 | if (S_ISLNK(st.st_mode)) { |
cf219d8c LT |
2786 | struct strbuf sb = STRBUF_INIT; |
2787 | ||
2788 | if (strbuf_readlink(&sb, s->path, s->size)) | |
6973dcae | 2789 | goto err_empty; |
0956a6db RS |
2790 | s->size = sb.len; |
2791 | s->data = strbuf_detach(&sb, NULL); | |
cf219d8c | 2792 | s->should_free = 1; |
6973dcae JH |
2793 | return 0; |
2794 | } | |
cf219d8c LT |
2795 | if (size_only) |
2796 | return 0; | |
6bf3b813 NTND |
2797 | if ((flags & CHECK_BINARY) && |
2798 | s->size > big_file_threshold && s->is_binary == -1) { | |
2799 | s->is_binary = 1; | |
2800 | return 0; | |
2801 | } | |
6973dcae JH |
2802 | fd = open(s->path, O_RDONLY); |
2803 | if (fd < 0) | |
2804 | goto err_empty; | |
c4712e45 | 2805 | s->data = xmmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0); |
6973dcae | 2806 | close(fd); |
6973dcae | 2807 | s->should_munmap = 1; |
6c510bee LT |
2808 | |
2809 | /* | |
2810 | * Convert from working tree format to canonical git format | |
2811 | */ | |
5430bb28 | 2812 | if (convert_to_git(s->path, s->data, s->size, &buf, crlf_warn)) { |
c32f749f | 2813 | size_t size = 0; |
6c510bee LT |
2814 | munmap(s->data, s->size); |
2815 | s->should_munmap = 0; | |
c32f749f RS |
2816 | s->data = strbuf_detach(&buf, &size); |
2817 | s->size = size; | |
6c510bee LT |
2818 | s->should_free = 1; |
2819 | } | |
6973dcae JH |
2820 | } |
2821 | else { | |
21666f1a | 2822 | enum object_type type; |
6bf3b813 | 2823 | if (size_only || (flags & CHECK_BINARY)) { |
a0d12c44 | 2824 | type = sha1_object_info(s->oid.hash, &s->size); |
c50c4316 | 2825 | if (type < 0) |
a0d12c44 | 2826 | die("unable to read %s", |
2827 | oid_to_hex(&s->oid)); | |
6bf3b813 NTND |
2828 | if (size_only) |
2829 | return 0; | |
2830 | if (s->size > big_file_threshold && s->is_binary == -1) { | |
2831 | s->is_binary = 1; | |
2832 | return 0; | |
2833 | } | |
6973dcae | 2834 | } |
a0d12c44 | 2835 | s->data = read_sha1_file(s->oid.hash, &type, &s->size); |
6bf3b813 | 2836 | if (!s->data) |
a0d12c44 | 2837 | die("unable to read %s", oid_to_hex(&s->oid)); |
6bf3b813 | 2838 | s->should_free = 1; |
6973dcae JH |
2839 | } |
2840 | return 0; | |
2841 | } | |
2842 | ||
8ae92e63 | 2843 | void diff_free_filespec_blob(struct diff_filespec *s) |
6973dcae JH |
2844 | { |
2845 | if (s->should_free) | |
2846 | free(s->data); | |
2847 | else if (s->should_munmap) | |
2848 | munmap(s->data, s->size); | |
fc3abdf5 JH |
2849 | |
2850 | if (s->should_free || s->should_munmap) { | |
2851 | s->should_free = s->should_munmap = 0; | |
2852 | s->data = NULL; | |
2853 | } | |
eede7b7d JK |
2854 | } |
2855 | ||
2856 | void diff_free_filespec_data(struct diff_filespec *s) | |
2857 | { | |
8ae92e63 | 2858 | diff_free_filespec_blob(s); |
6973dcae JH |
2859 | free(s->cnt_data); |
2860 | s->cnt_data = NULL; | |
2861 | } | |
2862 | ||
4e218f54 | 2863 | static void prep_temp_blob(const char *path, struct diff_tempfile *temp, |
6973dcae JH |
2864 | void *blob, |
2865 | unsigned long size, | |
09bdff29 | 2866 | const struct object_id *oid, |
6973dcae JH |
2867 | int mode) |
2868 | { | |
2869 | int fd; | |
4e218f54 | 2870 | struct strbuf buf = STRBUF_INIT; |
003b33a8 DA |
2871 | struct strbuf template = STRBUF_INIT; |
2872 | char *path_dup = xstrdup(path); | |
2873 | const char *base = basename(path_dup); | |
6973dcae | 2874 | |
003b33a8 DA |
2875 | /* Generate "XXXXXX_basename.ext" */ |
2876 | strbuf_addstr(&template, "XXXXXX_"); | |
2877 | strbuf_addstr(&template, base); | |
2878 | ||
284098f1 | 2879 | fd = mks_tempfile_ts(&temp->tempfile, template.buf, strlen(base) + 1); |
6973dcae | 2880 | if (fd < 0) |
d824cbba | 2881 | die_errno("unable to create temp-file"); |
4e218f54 JS |
2882 | if (convert_to_working_tree(path, |
2883 | (const char *)blob, (size_t)size, &buf)) { | |
2884 | blob = buf.buf; | |
2885 | size = buf.len; | |
2886 | } | |
93822c22 | 2887 | if (write_in_full(fd, blob, size) != size) |
0721c314 | 2888 | die_errno("unable to write temp-file"); |
284098f1 MH |
2889 | close_tempfile(&temp->tempfile); |
2890 | temp->name = get_tempfile_path(&temp->tempfile); | |
09bdff29 | 2891 | oid_to_hex_r(temp->hex, oid); |
5096d490 | 2892 | xsnprintf(temp->mode, sizeof(temp->mode), "%06o", mode); |
4e218f54 | 2893 | strbuf_release(&buf); |
003b33a8 DA |
2894 | strbuf_release(&template); |
2895 | free(path_dup); | |
6973dcae JH |
2896 | } |
2897 | ||
479b0ae8 JK |
2898 | static struct diff_tempfile *prepare_temp_file(const char *name, |
2899 | struct diff_filespec *one) | |
6973dcae | 2900 | { |
479b0ae8 JK |
2901 | struct diff_tempfile *temp = claim_diff_tempfile(); |
2902 | ||
6973dcae JH |
2903 | if (!DIFF_FILE_VALID(one)) { |
2904 | not_a_valid_file: | |
2905 | /* A '-' entry produces this for file-2, and | |
2906 | * a '+' entry produces this for file-1. | |
2907 | */ | |
2908 | temp->name = "/dev/null"; | |
5096d490 JK |
2909 | xsnprintf(temp->hex, sizeof(temp->hex), "."); |
2910 | xsnprintf(temp->mode, sizeof(temp->mode), "."); | |
479b0ae8 JK |
2911 | return temp; |
2912 | } | |
2913 | ||
aba47272 | 2914 | if (!S_ISGITLINK(one->mode) && |
41c9560e | 2915 | (!one->oid_valid || |
a0d12c44 | 2916 | reuse_worktree_file(name, one->oid.hash, 1))) { |
6973dcae JH |
2917 | struct stat st; |
2918 | if (lstat(name, &st) < 0) { | |
2919 | if (errno == ENOENT) | |
2920 | goto not_a_valid_file; | |
d824cbba | 2921 | die_errno("stat(%s)", name); |
6973dcae JH |
2922 | } |
2923 | if (S_ISLNK(st.st_mode)) { | |
3cd7388d JK |
2924 | struct strbuf sb = STRBUF_INIT; |
2925 | if (strbuf_readlink(&sb, name, st.st_size) < 0) | |
0721c314 | 2926 | die_errno("readlink(%s)", name); |
3cd7388d | 2927 | prep_temp_blob(name, temp, sb.buf, sb.len, |
41c9560e | 2928 | (one->oid_valid ? |
09bdff29 | 2929 | &one->oid : &null_oid), |
41c9560e | 2930 | (one->oid_valid ? |
6973dcae | 2931 | one->mode : S_IFLNK)); |
3cd7388d | 2932 | strbuf_release(&sb); |
6973dcae JH |
2933 | } |
2934 | else { | |
2935 | /* we can borrow from the file in the work tree */ | |
2936 | temp->name = name; | |
41c9560e | 2937 | if (!one->oid_valid) |
d59f765a | 2938 | sha1_to_hex_r(temp->hex, null_sha1); |
6973dcae | 2939 | else |
a0d12c44 | 2940 | sha1_to_hex_r(temp->hex, one->oid.hash); |
6973dcae JH |
2941 | /* Even though we may sometimes borrow the |
2942 | * contents from the work tree, we always want | |
2943 | * one->mode. mode is trustworthy even when | |
2944 | * !(one->sha1_valid), as long as | |
2945 | * DIFF_FILE_VALID(one). | |
2946 | */ | |
5096d490 | 2947 | xsnprintf(temp->mode, sizeof(temp->mode), "%06o", one->mode); |
6973dcae | 2948 | } |
479b0ae8 | 2949 | return temp; |
6973dcae JH |
2950 | } |
2951 | else { | |
2952 | if (diff_populate_filespec(one, 0)) | |
2953 | die("cannot read data blob for %s", one->path); | |
4e218f54 | 2954 | prep_temp_blob(name, temp, one->data, one->size, |
09bdff29 | 2955 | &one->oid, one->mode); |
6973dcae | 2956 | } |
479b0ae8 | 2957 | return temp; |
6973dcae JH |
2958 | } |
2959 | ||
f3efe787 JK |
2960 | static void add_external_diff_name(struct argv_array *argv, |
2961 | const char *name, | |
2962 | struct diff_filespec *df) | |
2963 | { | |
2964 | struct diff_tempfile *temp = prepare_temp_file(name, df); | |
2965 | argv_array_push(argv, temp->name); | |
2966 | argv_array_push(argv, temp->hex); | |
2967 | argv_array_push(argv, temp->mode); | |
2968 | } | |
2969 | ||
6973dcae JH |
2970 | /* An external diff command takes: |
2971 | * | |
2972 | * diff-cmd name infile1 infile1-sha1 infile1-mode \ | |
2973 | * infile2 infile2-sha1 infile2-mode [ rename-to ] | |
2974 | * | |
2975 | */ | |
2976 | static void run_external_diff(const char *pgm, | |
2977 | const char *name, | |
2978 | const char *other, | |
2979 | struct diff_filespec *one, | |
2980 | struct diff_filespec *two, | |
2981 | const char *xfrm_msg, | |
ee7fb0b1 ZK |
2982 | int complete_rewrite, |
2983 | struct diff_options *o) | |
6973dcae | 2984 | { |
82fbf269 | 2985 | struct argv_array argv = ARGV_ARRAY_INIT; |
ae049c95 | 2986 | struct argv_array env = ARGV_ARRAY_INIT; |
ee7fb0b1 | 2987 | struct diff_queue_struct *q = &diff_queued_diff; |
6973dcae | 2988 | |
0d4217d9 JK |
2989 | argv_array_push(&argv, pgm); |
2990 | argv_array_push(&argv, name); | |
6973dcae | 2991 | |
6973dcae | 2992 | if (one && two) { |
f3efe787 JK |
2993 | add_external_diff_name(&argv, name, one); |
2994 | if (!other) | |
2995 | add_external_diff_name(&argv, name, two); | |
2996 | else { | |
2997 | add_external_diff_name(&argv, other, two); | |
82fbf269 JK |
2998 | argv_array_push(&argv, other); |
2999 | argv_array_push(&argv, xfrm_msg); | |
6973dcae | 3000 | } |
6973dcae | 3001 | } |
ee7fb0b1 | 3002 | |
ae049c95 JK |
3003 | argv_array_pushf(&env, "GIT_DIFF_PATH_COUNTER=%d", ++o->diff_path_counter); |
3004 | argv_array_pushf(&env, "GIT_DIFF_PATH_TOTAL=%d", q->nr); | |
ee7fb0b1 | 3005 | |
89294d14 JK |
3006 | if (run_command_v_opt_cd_env(argv.argv, RUN_USING_SHELL, NULL, env.argv)) |
3007 | die(_("external diff died, stopping at %s"), name); | |
ee7fb0b1 | 3008 | |
6973dcae | 3009 | remove_tempfile(); |
82fbf269 | 3010 | argv_array_clear(&argv); |
ae049c95 | 3011 | argv_array_clear(&env); |
6973dcae JH |
3012 | } |
3013 | ||
b67b9612 JH |
3014 | static int similarity_index(struct diff_filepair *p) |
3015 | { | |
3016 | return p->score * 100 / MAX_SCORE; | |
3017 | } | |
3018 | ||
3019 | static void fill_metainfo(struct strbuf *msg, | |
3020 | const char *name, | |
3021 | const char *other, | |
3022 | struct diff_filespec *one, | |
3023 | struct diff_filespec *two, | |
3024 | struct diff_options *o, | |
37466447 | 3025 | struct diff_filepair *p, |
5977744d | 3026 | int *must_show_header, |
37466447 | 3027 | int use_color) |
b67b9612 | 3028 | { |
37466447 BW |
3029 | const char *set = diff_get_color(use_color, DIFF_METAINFO); |
3030 | const char *reset = diff_get_color(use_color, DIFF_RESET); | |
30997bb8 | 3031 | const char *line_prefix = diff_line_prefix(o); |
7be57610 | 3032 | |
296c6bb2 | 3033 | *must_show_header = 1; |
b67b9612 JH |
3034 | strbuf_init(msg, PATH_MAX * 2 + 300); |
3035 | switch (p->status) { | |
3036 | case DIFF_STATUS_COPIED: | |
98ad90fb JH |
3037 | strbuf_addf(msg, "%s%ssimilarity index %d%%", |
3038 | line_prefix, set, similarity_index(p)); | |
3039 | strbuf_addf(msg, "%s\n%s%scopy from ", | |
3040 | reset, line_prefix, set); | |
b67b9612 | 3041 | quote_c_style(name, msg, NULL, 0); |
98ad90fb | 3042 | strbuf_addf(msg, "%s\n%s%scopy to ", reset, line_prefix, set); |
b67b9612 | 3043 | quote_c_style(other, msg, NULL, 0); |
37466447 | 3044 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 JH |
3045 | break; |
3046 | case DIFF_STATUS_RENAMED: | |
98ad90fb JH |
3047 | strbuf_addf(msg, "%s%ssimilarity index %d%%", |
3048 | line_prefix, set, similarity_index(p)); | |
3049 | strbuf_addf(msg, "%s\n%s%srename from ", | |
3050 | reset, line_prefix, set); | |
b67b9612 | 3051 | quote_c_style(name, msg, NULL, 0); |
98ad90fb JH |
3052 | strbuf_addf(msg, "%s\n%s%srename to ", |
3053 | reset, line_prefix, set); | |
b67b9612 | 3054 | quote_c_style(other, msg, NULL, 0); |
37466447 | 3055 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 JH |
3056 | break; |
3057 | case DIFF_STATUS_MODIFIED: | |
3058 | if (p->score) { | |
98ad90fb JH |
3059 | strbuf_addf(msg, "%s%sdissimilarity index %d%%%s\n", |
3060 | line_prefix, | |
37466447 | 3061 | set, similarity_index(p), reset); |
b67b9612 JH |
3062 | break; |
3063 | } | |
3064 | /* fallthru */ | |
3065 | default: | |
296c6bb2 | 3066 | *must_show_header = 0; |
b67b9612 | 3067 | } |
a0d12c44 | 3068 | if (one && two && oidcmp(&one->oid, &two->oid)) { |
b67b9612 JH |
3069 | int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV; |
3070 | ||
3071 | if (DIFF_OPT_TST(o, BINARY)) { | |
3072 | mmfile_t mf; | |
3073 | if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) || | |
3074 | (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two))) | |
3075 | abbrev = 40; | |
3076 | } | |
e13f38a3 | 3077 | strbuf_addf(msg, "%s%sindex %s..", line_prefix, set, |
a0d12c44 | 3078 | find_unique_abbrev(one->oid.hash, abbrev)); |
3079 | strbuf_addstr(msg, find_unique_abbrev(two->oid.hash, abbrev)); | |
b67b9612 JH |
3080 | if (one->mode == two->mode) |
3081 | strbuf_addf(msg, " %06o", one->mode); | |
37466447 | 3082 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 | 3083 | } |
b67b9612 JH |
3084 | } |
3085 | ||
6973dcae JH |
3086 | static void run_diff_cmd(const char *pgm, |
3087 | const char *name, | |
3088 | const char *other, | |
cd676a51 | 3089 | const char *attr_path, |
6973dcae JH |
3090 | struct diff_filespec *one, |
3091 | struct diff_filespec *two, | |
b67b9612 | 3092 | struct strbuf *msg, |
051308f6 | 3093 | struct diff_options *o, |
b67b9612 | 3094 | struct diff_filepair *p) |
6973dcae | 3095 | { |
b67b9612 JH |
3096 | const char *xfrm_msg = NULL; |
3097 | int complete_rewrite = (p->status == DIFF_STATUS_MODIFIED) && p->score; | |
296c6bb2 | 3098 | int must_show_header = 0; |
b67b9612 | 3099 | |
bd8c1a9b JH |
3100 | |
3101 | if (DIFF_OPT_TST(o, ALLOW_EXTERNAL)) { | |
be58e70d JK |
3102 | struct userdiff_driver *drv = userdiff_find_by_path(attr_path); |
3103 | if (drv && drv->external) | |
3104 | pgm = drv->external; | |
f1af60bd JH |
3105 | } |
3106 | ||
37466447 BW |
3107 | if (msg) { |
3108 | /* | |
3109 | * don't use colors when the header is intended for an | |
3110 | * external diff driver | |
3111 | */ | |
3112 | fill_metainfo(msg, name, other, one, two, o, p, | |
5977744d | 3113 | &must_show_header, |
daa0c3d9 | 3114 | want_color(o->use_color) && !pgm); |
37466447 BW |
3115 | xfrm_msg = msg->len ? msg->buf : NULL; |
3116 | } | |
3117 | ||
6973dcae JH |
3118 | if (pgm) { |
3119 | run_external_diff(pgm, name, other, one, two, xfrm_msg, | |
ee7fb0b1 | 3120 | complete_rewrite, o); |
6973dcae JH |
3121 | return; |
3122 | } | |
3123 | if (one && two) | |
3124 | builtin_diff(name, other ? other : name, | |
296c6bb2 CC |
3125 | one, two, xfrm_msg, must_show_header, |
3126 | o, complete_rewrite); | |
6973dcae | 3127 | else |
c0c77734 | 3128 | fprintf(o->file, "* Unmerged path %s\n", name); |
6973dcae JH |
3129 | } |
3130 | ||
3131 | static void diff_fill_sha1_info(struct diff_filespec *one) | |
3132 | { | |
3133 | if (DIFF_FILE_VALID(one)) { | |
41c9560e | 3134 | if (!one->oid_valid) { |
6973dcae | 3135 | struct stat st; |
4682d852 | 3136 | if (one->is_stdin) { |
a0d12c44 | 3137 | oidclr(&one->oid); |
5332b2af JS |
3138 | return; |
3139 | } | |
6973dcae | 3140 | if (lstat(one->path, &st) < 0) |
0721c314 | 3141 | die_errno("stat '%s'", one->path); |
a0d12c44 | 3142 | if (index_path(one->oid.hash, one->path, &st, 0)) |
d7530708 | 3143 | die("cannot hash %s", one->path); |
6973dcae JH |
3144 | } |
3145 | } | |
3146 | else | |
a0d12c44 | 3147 | oidclr(&one->oid); |
6973dcae JH |
3148 | } |
3149 | ||
cd676a51 JH |
3150 | static void strip_prefix(int prefix_length, const char **namep, const char **otherp) |
3151 | { | |
3152 | /* Strip the prefix but do not molest /dev/null and absolute paths */ | |
d8faea9d | 3153 | if (*namep && **namep != '/') { |
cd676a51 | 3154 | *namep += prefix_length; |
d8faea9d JN |
3155 | if (**namep == '/') |
3156 | ++*namep; | |
3157 | } | |
3158 | if (*otherp && **otherp != '/') { | |
cd676a51 | 3159 | *otherp += prefix_length; |
d8faea9d JN |
3160 | if (**otherp == '/') |
3161 | ++*otherp; | |
3162 | } | |
cd676a51 JH |
3163 | } |
3164 | ||
6973dcae JH |
3165 | static void run_diff(struct diff_filepair *p, struct diff_options *o) |
3166 | { | |
3167 | const char *pgm = external_diff(); | |
663af342 | 3168 | struct strbuf msg; |
663af342 PH |
3169 | struct diff_filespec *one = p->one; |
3170 | struct diff_filespec *two = p->two; | |
6973dcae JH |
3171 | const char *name; |
3172 | const char *other; | |
cd676a51 | 3173 | const char *attr_path; |
663af342 | 3174 | |
cd676a51 JH |
3175 | name = p->one->path; |
3176 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
3177 | attr_path = name; | |
3178 | if (o->prefix_length) | |
3179 | strip_prefix(o->prefix_length, &name, &other); | |
6973dcae | 3180 | |
bd8c1a9b JH |
3181 | if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL)) |
3182 | pgm = NULL; | |
3183 | ||
6973dcae | 3184 | if (DIFF_PAIR_UNMERGED(p)) { |
cd676a51 | 3185 | run_diff_cmd(pgm, name, NULL, attr_path, |
b67b9612 | 3186 | NULL, NULL, NULL, o, p); |
6973dcae JH |
3187 | return; |
3188 | } | |
3189 | ||
6973dcae JH |
3190 | diff_fill_sha1_info(one); |
3191 | diff_fill_sha1_info(two); | |
3192 | ||
6973dcae JH |
3193 | if (!pgm && |
3194 | DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) && | |
3195 | (S_IFMT & one->mode) != (S_IFMT & two->mode)) { | |
b67b9612 JH |
3196 | /* |
3197 | * a filepair that changes between file and symlink | |
6973dcae JH |
3198 | * needs to be split into deletion and creation. |
3199 | */ | |
3200 | struct diff_filespec *null = alloc_filespec(two->path); | |
cd676a51 | 3201 | run_diff_cmd(NULL, name, other, attr_path, |
b67b9612 | 3202 | one, null, &msg, o, p); |
6973dcae | 3203 | free(null); |
b67b9612 JH |
3204 | strbuf_release(&msg); |
3205 | ||
6973dcae | 3206 | null = alloc_filespec(one->path); |
cd676a51 | 3207 | run_diff_cmd(NULL, name, other, attr_path, |
b67b9612 | 3208 | null, two, &msg, o, p); |
6973dcae JH |
3209 | free(null); |
3210 | } | |
3211 | else | |
cd676a51 | 3212 | run_diff_cmd(pgm, name, other, attr_path, |
b67b9612 | 3213 | one, two, &msg, o, p); |
6973dcae | 3214 | |
663af342 | 3215 | strbuf_release(&msg); |
6973dcae JH |
3216 | } |
3217 | ||
3218 | static void run_diffstat(struct diff_filepair *p, struct diff_options *o, | |
3219 | struct diffstat_t *diffstat) | |
3220 | { | |
3221 | const char *name; | |
3222 | const char *other; | |
3223 | ||
3224 | if (DIFF_PAIR_UNMERGED(p)) { | |
3225 | /* unmerged */ | |
74faaa16 | 3226 | builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, p); |
6973dcae JH |
3227 | return; |
3228 | } | |
3229 | ||
3230 | name = p->one->path; | |
3231 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
3232 | ||
cd676a51 JH |
3233 | if (o->prefix_length) |
3234 | strip_prefix(o->prefix_length, &name, &other); | |
3235 | ||
6973dcae JH |
3236 | diff_fill_sha1_info(p->one); |
3237 | diff_fill_sha1_info(p->two); | |
3238 | ||
74faaa16 | 3239 | builtin_diffstat(name, other, p->one, p->two, diffstat, o, p); |
6973dcae JH |
3240 | } |
3241 | ||
88246898 JS |
3242 | static void run_checkdiff(struct diff_filepair *p, struct diff_options *o) |
3243 | { | |
3244 | const char *name; | |
3245 | const char *other; | |
cd676a51 | 3246 | const char *attr_path; |
88246898 JS |
3247 | |
3248 | if (DIFF_PAIR_UNMERGED(p)) { | |
3249 | /* unmerged */ | |
3250 | return; | |
3251 | } | |
3252 | ||
3253 | name = p->one->path; | |
3254 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
cd676a51 JH |
3255 | attr_path = other ? other : name; |
3256 | ||
3257 | if (o->prefix_length) | |
3258 | strip_prefix(o->prefix_length, &name, &other); | |
88246898 JS |
3259 | |
3260 | diff_fill_sha1_info(p->one); | |
3261 | diff_fill_sha1_info(p->two); | |
3262 | ||
cd676a51 | 3263 | builtin_checkdiff(name, other, attr_path, p->one, p->two, o); |
88246898 JS |
3264 | } |
3265 | ||
6973dcae JH |
3266 | void diff_setup(struct diff_options *options) |
3267 | { | |
be4f2b40 | 3268 | memcpy(options, &default_diff_options, sizeof(*options)); |
c0c77734 DB |
3269 | |
3270 | options->file = stdout; | |
3271 | ||
6973dcae JH |
3272 | options->line_termination = '\n'; |
3273 | options->break_opt = -1; | |
3274 | options->rename_limit = -1; | |
712d2c7d | 3275 | options->dirstat_permille = diff_dirstat_permille_default; |
6468a4e5 | 3276 | options->context = diff_context_default; |
b8767f79 | 3277 | options->ws_error_highlight = WSEH_NEW; |
90d43b07 | 3278 | DIFF_OPT_SET(options, RENAME_EMPTY); |
6973dcae | 3279 | |
72441af7 | 3280 | /* pathchange left =NULL by default */ |
6973dcae JH |
3281 | options->change = diff_change; |
3282 | options->add_remove = diff_addremove; | |
f1c96261 | 3283 | options->use_color = diff_use_color_default; |
b68ea12e | 3284 | options->detect_rename = diff_detect_rename_default; |
07ab4dec | 3285 | options->xdl_opts |= diff_algorithm; |
d634d61e SB |
3286 | if (diff_compaction_heuristic) |
3287 | DIFF_XDL_SET(options, COMPACTION_HEURISTIC); | |
eab9a40b | 3288 | |
6d8940b5 SB |
3289 | options->orderfile = diff_order_file_cfg; |
3290 | ||
f89504dd EC |
3291 | if (diff_no_prefix) { |
3292 | options->a_prefix = options->b_prefix = ""; | |
3293 | } else if (!diff_mnemonic_prefix) { | |
a5a818ee JH |
3294 | options->a_prefix = "a/"; |
3295 | options->b_prefix = "b/"; | |
3296 | } | |
6973dcae JH |
3297 | } |
3298 | ||
28452655 | 3299 | void diff_setup_done(struct diff_options *options) |
6973dcae | 3300 | { |
d7de00f7 TH |
3301 | int count = 0; |
3302 | ||
6c374008 JH |
3303 | if (options->set_default) |
3304 | options->set_default(options); | |
3305 | ||
d7de00f7 TH |
3306 | if (options->output_format & DIFF_FORMAT_NAME) |
3307 | count++; | |
3308 | if (options->output_format & DIFF_FORMAT_NAME_STATUS) | |
3309 | count++; | |
3310 | if (options->output_format & DIFF_FORMAT_CHECKDIFF) | |
3311 | count++; | |
3312 | if (options->output_format & DIFF_FORMAT_NO_OUTPUT) | |
3313 | count++; | |
3314 | if (count > 1) | |
3315 | die("--name-only, --name-status, --check and -s are mutually exclusive"); | |
3316 | ||
f245194f JH |
3317 | /* |
3318 | * Most of the time we can say "there are changes" | |
3319 | * only by checking if there are changed paths, but | |
3320 | * --ignore-whitespace* options force us to look | |
97bf2a08 | 3321 | * inside contents. |
f245194f JH |
3322 | */ |
3323 | ||
3324 | if (DIFF_XDL_TST(options, IGNORE_WHITESPACE) || | |
3325 | DIFF_XDL_TST(options, IGNORE_WHITESPACE_CHANGE) || | |
3326 | DIFF_XDL_TST(options, IGNORE_WHITESPACE_AT_EOL)) | |
3327 | DIFF_OPT_SET(options, DIFF_FROM_CONTENTS); | |
3328 | else | |
3329 | DIFF_OPT_CLR(options, DIFF_FROM_CONTENTS); | |
3330 | ||
8f67f8ae | 3331 | if (DIFF_OPT_TST(options, FIND_COPIES_HARDER)) |
03b9d560 JH |
3332 | options->detect_rename = DIFF_DETECT_COPY; |
3333 | ||
cd676a51 JH |
3334 | if (!DIFF_OPT_TST(options, RELATIVE_NAME)) |
3335 | options->prefix = NULL; | |
3336 | if (options->prefix) | |
3337 | options->prefix_length = strlen(options->prefix); | |
3338 | else | |
3339 | options->prefix_length = 0; | |
3340 | ||
c6744349 TH |
3341 | if (options->output_format & (DIFF_FORMAT_NAME | |
3342 | DIFF_FORMAT_NAME_STATUS | | |
3343 | DIFF_FORMAT_CHECKDIFF | | |
3344 | DIFF_FORMAT_NO_OUTPUT)) | |
3345 | options->output_format &= ~(DIFF_FORMAT_RAW | | |
74e2abe5 | 3346 | DIFF_FORMAT_NUMSTAT | |
c6744349 | 3347 | DIFF_FORMAT_DIFFSTAT | |
ebd124c6 | 3348 | DIFF_FORMAT_SHORTSTAT | |
7df7c019 | 3349 | DIFF_FORMAT_DIRSTAT | |
c6744349 TH |
3350 | DIFF_FORMAT_SUMMARY | |
3351 | DIFF_FORMAT_PATCH); | |
3352 | ||
6973dcae JH |
3353 | /* |
3354 | * These cases always need recursive; we do not drop caller-supplied | |
3355 | * recursive bits for other formats here. | |
3356 | */ | |
c6744349 | 3357 | if (options->output_format & (DIFF_FORMAT_PATCH | |
74e2abe5 | 3358 | DIFF_FORMAT_NUMSTAT | |
c6744349 | 3359 | DIFF_FORMAT_DIFFSTAT | |
ebd124c6 | 3360 | DIFF_FORMAT_SHORTSTAT | |
7df7c019 | 3361 | DIFF_FORMAT_DIRSTAT | |
d7014dc0 | 3362 | DIFF_FORMAT_SUMMARY | |
c6744349 | 3363 | DIFF_FORMAT_CHECKDIFF)) |
8f67f8ae | 3364 | DIFF_OPT_SET(options, RECURSIVE); |
5e363541 | 3365 | /* |
3969cf7d | 3366 | * Also pickaxe would not work very well if you do not say recursive |
5e363541 | 3367 | */ |
3969cf7d | 3368 | if (options->pickaxe) |
8f67f8ae | 3369 | DIFF_OPT_SET(options, RECURSIVE); |
ae6d5c1b JL |
3370 | /* |
3371 | * When patches are generated, submodules diffed against the work tree | |
3372 | * must be checked for dirtiness too so it can be shown in the output | |
3373 | */ | |
3374 | if (options->output_format & DIFF_FORMAT_PATCH) | |
3375 | DIFF_OPT_SET(options, DIRTY_SUBMODULES); | |
5e363541 | 3376 | |
6973dcae JH |
3377 | if (options->detect_rename && options->rename_limit < 0) |
3378 | options->rename_limit = diff_rename_limit_default; | |
3379 | if (options->setup & DIFF_SETUP_USE_CACHE) { | |
3380 | if (!active_cache) | |
3381 | /* read-cache does not die even when it fails | |
3382 | * so it is safe for us to do this here. Also | |
3383 | * it does not smudge active_cache or active_nr | |
3384 | * when it fails, so we do not have to worry about | |
3385 | * cleaning it up ourselves either. | |
3386 | */ | |
3387 | read_cache(); | |
3388 | } | |
6973dcae JH |
3389 | if (options->abbrev <= 0 || 40 < options->abbrev) |
3390 | options->abbrev = 40; /* full */ | |
3391 | ||
68aacb2f JH |
3392 | /* |
3393 | * It does not make sense to show the first hit we happened | |
3394 | * to have found. It does not make sense not to return with | |
3395 | * exit code in such a case either. | |
3396 | */ | |
90b19941 | 3397 | if (DIFF_OPT_TST(options, QUICK)) { |
68aacb2f | 3398 | options->output_format = DIFF_FORMAT_NO_OUTPUT; |
8f67f8ae | 3399 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); |
68aacb2f | 3400 | } |
ee7fb0b1 | 3401 | |
0ea7d5b6 | 3402 | options->diff_path_counter = 0; |
b0e2c999 | 3403 | |
dd63f169 JK |
3404 | if (DIFF_OPT_TST(options, FOLLOW_RENAMES) && options->pathspec.nr != 1) |
3405 | die(_("--follow requires exactly one pathspec")); | |
6973dcae JH |
3406 | } |
3407 | ||
d2543b8e | 3408 | static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val) |
ee1e5412 LT |
3409 | { |
3410 | char c, *eq; | |
3411 | int len; | |
3412 | ||
3413 | if (*arg != '-') | |
3414 | return 0; | |
3415 | c = *++arg; | |
3416 | if (!c) | |
3417 | return 0; | |
3418 | if (c == arg_short) { | |
3419 | c = *++arg; | |
3420 | if (!c) | |
3421 | return 1; | |
3422 | if (val && isdigit(c)) { | |
3423 | char *end; | |
3424 | int n = strtoul(arg, &end, 10); | |
3425 | if (*end) | |
3426 | return 0; | |
3427 | *val = n; | |
3428 | return 1; | |
3429 | } | |
3430 | return 0; | |
3431 | } | |
3432 | if (c != '-') | |
3433 | return 0; | |
3434 | arg++; | |
2c5495f7 RM |
3435 | eq = strchrnul(arg, '='); |
3436 | len = eq - arg; | |
ee1e5412 LT |
3437 | if (!len || strncmp(arg, arg_long, len)) |
3438 | return 0; | |
2c5495f7 | 3439 | if (*eq) { |
ee1e5412 LT |
3440 | int n; |
3441 | char *end; | |
3442 | if (!isdigit(*++eq)) | |
3443 | return 0; | |
3444 | n = strtoul(eq, &end, 10); | |
3445 | if (*end) | |
3446 | return 0; | |
3447 | *val = n; | |
3448 | } | |
3449 | return 1; | |
3450 | } | |
3451 | ||
16befb8b JH |
3452 | static int diff_scoreopt_parse(const char *opt); |
3453 | ||
dea007fb MM |
3454 | static inline int short_opt(char opt, const char **argv, |
3455 | const char **optarg) | |
3456 | { | |
3457 | const char *arg = argv[0]; | |
3458 | if (arg[0] != '-' || arg[1] != opt) | |
3459 | return 0; | |
3460 | if (arg[2] != '\0') { | |
3461 | *optarg = arg + 2; | |
3462 | return 1; | |
3463 | } | |
3464 | if (!argv[1]) | |
3465 | die("Option '%c' requires a value", opt); | |
3466 | *optarg = argv[1]; | |
3467 | return 2; | |
3468 | } | |
3469 | ||
3470 | int parse_long_opt(const char *opt, const char **argv, | |
3471 | const char **optarg) | |
3472 | { | |
3473 | const char *arg = argv[0]; | |
95b567c7 | 3474 | if (!skip_prefix(arg, "--", &arg)) |
dea007fb | 3475 | return 0; |
95b567c7 | 3476 | if (!skip_prefix(arg, opt, &arg)) |
dea007fb | 3477 | return 0; |
b0d12fc9 | 3478 | if (*arg == '=') { /* stuck form: --option=value */ |
dea007fb MM |
3479 | *optarg = arg + 1; |
3480 | return 1; | |
3481 | } | |
3482 | if (*arg != '\0') | |
3483 | return 0; | |
3484 | /* separate form: --option value */ | |
3485 | if (!argv[1]) | |
3486 | die("Option '--%s' requires a value", opt); | |
3487 | *optarg = argv[1]; | |
3488 | return 2; | |
3489 | } | |
3490 | ||
4d7f7a4a JN |
3491 | static int stat_opt(struct diff_options *options, const char **av) |
3492 | { | |
3493 | const char *arg = av[0]; | |
3494 | char *end; | |
3495 | int width = options->stat_width; | |
3496 | int name_width = options->stat_name_width; | |
969fe57b | 3497 | int graph_width = options->stat_graph_width; |
808e1db2 | 3498 | int count = options->stat_count; |
1e57208e | 3499 | int argcount = 1; |
4d7f7a4a | 3500 | |
0539cc00 JK |
3501 | if (!skip_prefix(arg, "--stat", &arg)) |
3502 | die("BUG: stat option does not begin with --stat: %s", arg); | |
4d7f7a4a JN |
3503 | end = (char *)arg; |
3504 | ||
3505 | switch (*arg) { | |
3506 | case '-': | |
95b567c7 | 3507 | if (skip_prefix(arg, "-width", &arg)) { |
1e57208e MM |
3508 | if (*arg == '=') |
3509 | width = strtoul(arg + 1, &end, 10); | |
3510 | else if (!*arg && !av[1]) | |
3511 | die("Option '--stat-width' requires a value"); | |
3512 | else if (!*arg) { | |
3513 | width = strtoul(av[1], &end, 10); | |
3514 | argcount = 2; | |
3515 | } | |
95b567c7 | 3516 | } else if (skip_prefix(arg, "-name-width", &arg)) { |
1e57208e MM |
3517 | if (*arg == '=') |
3518 | name_width = strtoul(arg + 1, &end, 10); | |
3519 | else if (!*arg && !av[1]) | |
3520 | die("Option '--stat-name-width' requires a value"); | |
3521 | else if (!*arg) { | |
3522 | name_width = strtoul(av[1], &end, 10); | |
3523 | argcount = 2; | |
3524 | } | |
95b567c7 | 3525 | } else if (skip_prefix(arg, "-graph-width", &arg)) { |
969fe57b ZJS |
3526 | if (*arg == '=') |
3527 | graph_width = strtoul(arg + 1, &end, 10); | |
3528 | else if (!*arg && !av[1]) | |
3529 | die("Option '--stat-graph-width' requires a value"); | |
3530 | else if (!*arg) { | |
3531 | graph_width = strtoul(av[1], &end, 10); | |
3532 | argcount = 2; | |
3533 | } | |
95b567c7 | 3534 | } else if (skip_prefix(arg, "-count", &arg)) { |
808e1db2 MG |
3535 | if (*arg == '=') |
3536 | count = strtoul(arg + 1, &end, 10); | |
3537 | else if (!*arg && !av[1]) | |
3538 | die("Option '--stat-count' requires a value"); | |
3539 | else if (!*arg) { | |
3540 | count = strtoul(av[1], &end, 10); | |
3541 | argcount = 2; | |
3542 | } | |
1e57208e | 3543 | } |
4d7f7a4a JN |
3544 | break; |
3545 | case '=': | |
3546 | width = strtoul(arg+1, &end, 10); | |
3547 | if (*end == ',') | |
3548 | name_width = strtoul(end+1, &end, 10); | |
808e1db2 MG |
3549 | if (*end == ',') |
3550 | count = strtoul(end+1, &end, 10); | |
4d7f7a4a JN |
3551 | } |
3552 | ||
3553 | /* Important! This checks all the error cases! */ | |
3554 | if (*end) | |
3555 | return 0; | |
3556 | options->output_format |= DIFF_FORMAT_DIFFSTAT; | |
3557 | options->stat_name_width = name_width; | |
969fe57b | 3558 | options->stat_graph_width = graph_width; |
4d7f7a4a | 3559 | options->stat_width = width; |
808e1db2 | 3560 | options->stat_count = count; |
1e57208e | 3561 | return argcount; |
4d7f7a4a JN |
3562 | } |
3563 | ||
333f3fb0 JH |
3564 | static int parse_dirstat_opt(struct diff_options *options, const char *params) |
3565 | { | |
51670fc8 JH |
3566 | struct strbuf errmsg = STRBUF_INIT; |
3567 | if (parse_dirstat_params(options, params, &errmsg)) | |
7478ac57 | 3568 | die(_("Failed to parse --dirstat/-X option parameter:\n%s"), |
51670fc8 JH |
3569 | errmsg.buf); |
3570 | strbuf_release(&errmsg); | |
333f3fb0 JH |
3571 | /* |
3572 | * The caller knows a dirstat-related option is given from the command | |
3573 | * line; allow it to say "return this_function();" | |
3574 | */ | |
3575 | options->output_format |= DIFF_FORMAT_DIRSTAT; | |
3576 | return 1; | |
3577 | } | |
3578 | ||
c47ef57c RR |
3579 | static int parse_submodule_opt(struct diff_options *options, const char *value) |
3580 | { | |
3581 | if (parse_submodule_params(options, value)) | |
3582 | die(_("Failed to parse --submodule option parameter: '%s'"), | |
3583 | value); | |
3584 | return 1; | |
3585 | } | |
3586 | ||
1ecc1cbd JH |
3587 | static const char diff_status_letters[] = { |
3588 | DIFF_STATUS_ADDED, | |
3589 | DIFF_STATUS_COPIED, | |
3590 | DIFF_STATUS_DELETED, | |
3591 | DIFF_STATUS_MODIFIED, | |
3592 | DIFF_STATUS_RENAMED, | |
3593 | DIFF_STATUS_TYPE_CHANGED, | |
3594 | DIFF_STATUS_UNKNOWN, | |
3595 | DIFF_STATUS_UNMERGED, | |
3596 | DIFF_STATUS_FILTER_AON, | |
3597 | DIFF_STATUS_FILTER_BROKEN, | |
3598 | '\0', | |
3599 | }; | |
3600 | ||
3601 | static unsigned int filter_bit['Z' + 1]; | |
3602 | ||
3603 | static void prepare_filter_bits(void) | |
3604 | { | |
3605 | int i; | |
3606 | ||
3607 | if (!filter_bit[DIFF_STATUS_ADDED]) { | |
3608 | for (i = 0; diff_status_letters[i]; i++) | |
3609 | filter_bit[(int) diff_status_letters[i]] = (1 << i); | |
3610 | } | |
3611 | } | |
3612 | ||
3613 | static unsigned filter_bit_tst(char status, const struct diff_options *opt) | |
3614 | { | |
3615 | return opt->filter & filter_bit[(int) status]; | |
3616 | } | |
3617 | ||
3618 | static int parse_diff_filter_opt(const char *optarg, struct diff_options *opt) | |
3619 | { | |
3620 | int i, optch; | |
3621 | ||
3622 | prepare_filter_bits(); | |
7f2ea5f0 JH |
3623 | |
3624 | /* | |
3625 | * If there is a negation e.g. 'd' in the input, and we haven't | |
3626 | * initialized the filter field with another --diff-filter, start | |
3627 | * from full set of bits, except for AON. | |
3628 | */ | |
3629 | if (!opt->filter) { | |
3630 | for (i = 0; (optch = optarg[i]) != '\0'; i++) { | |
3631 | if (optch < 'a' || 'z' < optch) | |
3632 | continue; | |
3633 | opt->filter = (1 << (ARRAY_SIZE(diff_status_letters) - 1)) - 1; | |
3634 | opt->filter &= ~filter_bit[DIFF_STATUS_FILTER_AON]; | |
3635 | break; | |
3636 | } | |
3637 | } | |
3638 | ||
1ecc1cbd JH |
3639 | for (i = 0; (optch = optarg[i]) != '\0'; i++) { |
3640 | unsigned int bit; | |
7f2ea5f0 JH |
3641 | int negate; |
3642 | ||
3643 | if ('a' <= optch && optch <= 'z') { | |
3644 | negate = 1; | |
3645 | optch = toupper(optch); | |
3646 | } else { | |
3647 | negate = 0; | |
3648 | } | |
1ecc1cbd JH |
3649 | |
3650 | bit = (0 <= optch && optch <= 'Z') ? filter_bit[optch] : 0; | |
3651 | if (!bit) | |
bf142ec4 | 3652 | return optarg[i]; |
7f2ea5f0 JH |
3653 | if (negate) |
3654 | opt->filter &= ~bit; | |
3655 | else | |
3656 | opt->filter |= bit; | |
1ecc1cbd JH |
3657 | } |
3658 | return 0; | |
3659 | } | |
3660 | ||
71482d38 MM |
3661 | static void enable_patch_output(int *fmt) { |
3662 | *fmt &= ~DIFF_FORMAT_NO_OUTPUT; | |
3663 | *fmt |= DIFF_FORMAT_PATCH; | |
3664 | } | |
3665 | ||
b8767f79 JH |
3666 | static int parse_one_token(const char **arg, const char *token) |
3667 | { | |
3f4f17b5 RS |
3668 | const char *rest; |
3669 | if (skip_prefix(*arg, token, &rest) && (!*rest || *rest == ',')) { | |
3670 | *arg = rest; | |
3671 | return 1; | |
3672 | } | |
3673 | return 0; | |
b8767f79 JH |
3674 | } |
3675 | ||
3676 | static int parse_ws_error_highlight(struct diff_options *opt, const char *arg) | |
3677 | { | |
3678 | const char *orig_arg = arg; | |
3679 | unsigned val = 0; | |
3680 | while (*arg) { | |
3681 | if (parse_one_token(&arg, "none")) | |
3682 | val = 0; | |
3683 | else if (parse_one_token(&arg, "default")) | |
3684 | val = WSEH_NEW; | |
3685 | else if (parse_one_token(&arg, "all")) | |
3686 | val = WSEH_NEW | WSEH_OLD | WSEH_CONTEXT; | |
3687 | else if (parse_one_token(&arg, "new")) | |
3688 | val |= WSEH_NEW; | |
3689 | else if (parse_one_token(&arg, "old")) | |
3690 | val |= WSEH_OLD; | |
3691 | else if (parse_one_token(&arg, "context")) | |
3692 | val |= WSEH_CONTEXT; | |
3693 | else { | |
3694 | error("unknown value after ws-error-highlight=%.*s", | |
3695 | (int)(arg - orig_arg), orig_arg); | |
3696 | return 0; | |
3697 | } | |
3698 | if (*arg) | |
3699 | arg++; | |
3700 | } | |
3701 | opt->ws_error_highlight = val; | |
3702 | return 1; | |
3703 | } | |
3704 | ||
a97262c6 NTND |
3705 | int diff_opt_parse(struct diff_options *options, |
3706 | const char **av, int ac, const char *prefix) | |
6973dcae JH |
3707 | { |
3708 | const char *arg = av[0]; | |
dea007fb MM |
3709 | const char *optarg; |
3710 | int argcount; | |
d054680c | 3711 | |
a97262c6 NTND |
3712 | if (!prefix) |
3713 | prefix = ""; | |
3714 | ||
d054680c | 3715 | /* Output format options */ |
71482d38 MM |
3716 | if (!strcmp(arg, "-p") || !strcmp(arg, "-u") || !strcmp(arg, "--patch") |
3717 | || opt_arg(arg, 'U', "unified", &options->context)) | |
3718 | enable_patch_output(&options->output_format); | |
a610786f TH |
3719 | else if (!strcmp(arg, "--raw")) |
3720 | options->output_format |= DIFF_FORMAT_RAW; | |
71482d38 MM |
3721 | else if (!strcmp(arg, "--patch-with-raw")) { |
3722 | enable_patch_output(&options->output_format); | |
3723 | options->output_format |= DIFF_FORMAT_RAW; | |
3724 | } else if (!strcmp(arg, "--numstat")) | |
74e2abe5 | 3725 | options->output_format |= DIFF_FORMAT_NUMSTAT; |
8f67f8ae | 3726 | else if (!strcmp(arg, "--shortstat")) |
ebd124c6 | 3727 | options->output_format |= DIFF_FORMAT_SHORTSTAT; |
333f3fb0 JH |
3728 | else if (!strcmp(arg, "-X") || !strcmp(arg, "--dirstat")) |
3729 | return parse_dirstat_opt(options, ""); | |
ae021d87 JK |
3730 | else if (skip_prefix(arg, "-X", &arg)) |
3731 | return parse_dirstat_opt(options, arg); | |
3732 | else if (skip_prefix(arg, "--dirstat=", &arg)) | |
3733 | return parse_dirstat_opt(options, arg); | |
333f3fb0 JH |
3734 | else if (!strcmp(arg, "--cumulative")) |
3735 | return parse_dirstat_opt(options, "cumulative"); | |
3736 | else if (!strcmp(arg, "--dirstat-by-file")) | |
3737 | return parse_dirstat_opt(options, "files"); | |
ae021d87 | 3738 | else if (skip_prefix(arg, "--dirstat-by-file=", &arg)) { |
333f3fb0 | 3739 | parse_dirstat_opt(options, "files"); |
ae021d87 | 3740 | return parse_dirstat_opt(options, arg); |
f88d225f | 3741 | } |
d054680c PH |
3742 | else if (!strcmp(arg, "--check")) |
3743 | options->output_format |= DIFF_FORMAT_CHECKDIFF; | |
3744 | else if (!strcmp(arg, "--summary")) | |
3745 | options->output_format |= DIFF_FORMAT_SUMMARY; | |
71482d38 MM |
3746 | else if (!strcmp(arg, "--patch-with-stat")) { |
3747 | enable_patch_output(&options->output_format); | |
3748 | options->output_format |= DIFF_FORMAT_DIFFSTAT; | |
3749 | } else if (!strcmp(arg, "--name-only")) | |
d054680c PH |
3750 | options->output_format |= DIFF_FORMAT_NAME; |
3751 | else if (!strcmp(arg, "--name-status")) | |
3752 | options->output_format |= DIFF_FORMAT_NAME_STATUS; | |
d09cd15d | 3753 | else if (!strcmp(arg, "-s") || !strcmp(arg, "--no-patch")) |
d054680c | 3754 | options->output_format |= DIFF_FORMAT_NO_OUTPUT; |
59556548 | 3755 | else if (starts_with(arg, "--stat")) |
808e1db2 | 3756 | /* --stat, --stat-width, --stat-name-width, or --stat-count */ |
4d7f7a4a | 3757 | return stat_opt(options, av); |
d054680c PH |
3758 | |
3759 | /* renames options */ | |
59556548 | 3760 | else if (starts_with(arg, "-B") || starts_with(arg, "--break-rewrites=") || |
37ab5156 | 3761 | !strcmp(arg, "--break-rewrites")) { |
8f67f8ae | 3762 | if ((options->break_opt = diff_scoreopt_parse(arg)) == -1) |
07cd7265 | 3763 | return error("invalid argument to -B: %s", arg+2); |
6973dcae | 3764 | } |
59556548 | 3765 | else if (starts_with(arg, "-M") || starts_with(arg, "--find-renames=") || |
f611ddc7 | 3766 | !strcmp(arg, "--find-renames")) { |
8f67f8ae | 3767 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) |
07cd7265 | 3768 | return error("invalid argument to -M: %s", arg+2); |
6973dcae JH |
3769 | options->detect_rename = DIFF_DETECT_RENAME; |
3770 | } | |
467ddc14 JH |
3771 | else if (!strcmp(arg, "-D") || !strcmp(arg, "--irreversible-delete")) { |
3772 | options->irreversible_delete = 1; | |
3773 | } | |
59556548 | 3774 | else if (starts_with(arg, "-C") || starts_with(arg, "--find-copies=") || |
f611ddc7 | 3775 | !strcmp(arg, "--find-copies")) { |
ca6c0970 | 3776 | if (options->detect_rename == DIFF_DETECT_COPY) |
8f67f8ae PH |
3777 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); |
3778 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) | |
07cd7265 | 3779 | return error("invalid argument to -C: %s", arg+2); |
6973dcae JH |
3780 | options->detect_rename = DIFF_DETECT_COPY; |
3781 | } | |
d054680c PH |
3782 | else if (!strcmp(arg, "--no-renames")) |
3783 | options->detect_rename = 0; | |
90d43b07 JK |
3784 | else if (!strcmp(arg, "--rename-empty")) |
3785 | DIFF_OPT_SET(options, RENAME_EMPTY); | |
3786 | else if (!strcmp(arg, "--no-rename-empty")) | |
3787 | DIFF_OPT_CLR(options, RENAME_EMPTY); | |
cd676a51 JH |
3788 | else if (!strcmp(arg, "--relative")) |
3789 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
ae021d87 | 3790 | else if (skip_prefix(arg, "--relative=", &arg)) { |
c0cb4a06 | 3791 | DIFF_OPT_SET(options, RELATIVE_NAME); |
ae021d87 | 3792 | options->prefix = arg; |
c0cb4a06 | 3793 | } |
d054680c PH |
3794 | |
3795 | /* xdiff options */ | |
81b568c8 JH |
3796 | else if (!strcmp(arg, "--minimal")) |
3797 | DIFF_XDL_SET(options, NEED_MINIMAL); | |
3798 | else if (!strcmp(arg, "--no-minimal")) | |
3799 | DIFF_XDL_CLR(options, NEED_MINIMAL); | |
d054680c | 3800 | else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space")) |
628d5c2b | 3801 | DIFF_XDL_SET(options, IGNORE_WHITESPACE); |
d054680c | 3802 | else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change")) |
628d5c2b | 3803 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_CHANGE); |
d054680c | 3804 | else if (!strcmp(arg, "--ignore-space-at-eol")) |
628d5c2b | 3805 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_AT_EOL); |
36617af7 AP |
3806 | else if (!strcmp(arg, "--ignore-blank-lines")) |
3807 | DIFF_XDL_SET(options, IGNORE_BLANK_LINES); | |
d634d61e SB |
3808 | else if (!strcmp(arg, "--compaction-heuristic")) |
3809 | DIFF_XDL_SET(options, COMPACTION_HEURISTIC); | |
3810 | else if (!strcmp(arg, "--no-compaction-heuristic")) | |
3811 | DIFF_XDL_CLR(options, COMPACTION_HEURISTIC); | |
34292bdd | 3812 | else if (!strcmp(arg, "--patience")) |
307ab20b | 3813 | options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF); |
8c912eea | 3814 | else if (!strcmp(arg, "--histogram")) |
307ab20b | 3815 | options->xdl_opts = DIFF_WITH_ALG(options, HISTOGRAM_DIFF); |
0895c6d4 JK |
3816 | else if ((argcount = parse_long_opt("diff-algorithm", av, &optarg))) { |
3817 | long value = parse_algorithm_value(optarg); | |
07924d4d MP |
3818 | if (value < 0) |
3819 | return error("option diff-algorithm accepts \"myers\", " | |
3820 | "\"minimal\", \"patience\" and \"histogram\""); | |
3821 | /* clear out previous settings */ | |
3822 | DIFF_XDL_CLR(options, NEED_MINIMAL); | |
3823 | options->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK; | |
3824 | options->xdl_opts |= value; | |
0895c6d4 | 3825 | return argcount; |
07924d4d | 3826 | } |
d054680c PH |
3827 | |
3828 | /* flags options */ | |
3829 | else if (!strcmp(arg, "--binary")) { | |
71482d38 | 3830 | enable_patch_output(&options->output_format); |
d054680c PH |
3831 | DIFF_OPT_SET(options, BINARY); |
3832 | } | |
3833 | else if (!strcmp(arg, "--full-index")) | |
3834 | DIFF_OPT_SET(options, FULL_INDEX); | |
3835 | else if (!strcmp(arg, "-a") || !strcmp(arg, "--text")) | |
3836 | DIFF_OPT_SET(options, TEXT); | |
3837 | else if (!strcmp(arg, "-R")) | |
3838 | DIFF_OPT_SET(options, REVERSE_DIFF); | |
6973dcae | 3839 | else if (!strcmp(arg, "--find-copies-harder")) |
8f67f8ae | 3840 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); |
750f7b66 | 3841 | else if (!strcmp(arg, "--follow")) |
8f67f8ae | 3842 | DIFF_OPT_SET(options, FOLLOW_RENAMES); |
076c9837 | 3843 | else if (!strcmp(arg, "--no-follow")) { |
aebbcf57 | 3844 | DIFF_OPT_CLR(options, FOLLOW_RENAMES); |
076c9837 DT |
3845 | DIFF_OPT_CLR(options, DEFAULT_FOLLOW_RENAMES); |
3846 | } else if (!strcmp(arg, "--color")) | |
f1c96261 | 3847 | options->use_color = 1; |
ae021d87 JK |
3848 | else if (skip_prefix(arg, "--color=", &arg)) { |
3849 | int value = git_config_colorbool(NULL, arg); | |
daa0c3d9 | 3850 | if (value < 0) |
73e9da01 | 3851 | return error("option `color' expects \"always\", \"auto\", or \"never\""); |
daa0c3d9 | 3852 | options->use_color = value; |
73e9da01 | 3853 | } |
fef88bb0 | 3854 | else if (!strcmp(arg, "--no-color")) |
f1c96261 | 3855 | options->use_color = 0; |
628d5c2b | 3856 | else if (!strcmp(arg, "--color-words")) { |
f1c96261 | 3857 | options->use_color = 1; |
882749a0 | 3858 | options->word_diff = DIFF_WORDS_COLOR; |
628d5c2b | 3859 | } |
ae021d87 | 3860 | else if (skip_prefix(arg, "--color-words=", &arg)) { |
f1c96261 | 3861 | options->use_color = 1; |
882749a0 | 3862 | options->word_diff = DIFF_WORDS_COLOR; |
ae021d87 | 3863 | options->word_regex = arg; |
2b6a5417 | 3864 | } |
882749a0 TR |
3865 | else if (!strcmp(arg, "--word-diff")) { |
3866 | if (options->word_diff == DIFF_WORDS_NONE) | |
3867 | options->word_diff = DIFF_WORDS_PLAIN; | |
3868 | } | |
ae021d87 JK |
3869 | else if (skip_prefix(arg, "--word-diff=", &arg)) { |
3870 | if (!strcmp(arg, "plain")) | |
882749a0 | 3871 | options->word_diff = DIFF_WORDS_PLAIN; |
ae021d87 | 3872 | else if (!strcmp(arg, "color")) { |
f1c96261 | 3873 | options->use_color = 1; |
882749a0 TR |
3874 | options->word_diff = DIFF_WORDS_COLOR; |
3875 | } | |
ae021d87 | 3876 | else if (!strcmp(arg, "porcelain")) |
882749a0 | 3877 | options->word_diff = DIFF_WORDS_PORCELAIN; |
ae021d87 | 3878 | else if (!strcmp(arg, "none")) |
882749a0 TR |
3879 | options->word_diff = DIFF_WORDS_NONE; |
3880 | else | |
ae021d87 | 3881 | die("bad --word-diff argument: %s", arg); |
882749a0 | 3882 | } |
dea007fb | 3883 | else if ((argcount = parse_long_opt("word-diff-regex", av, &optarg))) { |
882749a0 TR |
3884 | if (options->word_diff == DIFF_WORDS_NONE) |
3885 | options->word_diff = DIFF_WORDS_PLAIN; | |
dea007fb MM |
3886 | options->word_regex = optarg; |
3887 | return argcount; | |
882749a0 | 3888 | } |
41bbf9d5 | 3889 | else if (!strcmp(arg, "--exit-code")) |
8f67f8ae | 3890 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); |
68aacb2f | 3891 | else if (!strcmp(arg, "--quiet")) |
90b19941 | 3892 | DIFF_OPT_SET(options, QUICK); |
72909bef | 3893 | else if (!strcmp(arg, "--ext-diff")) |
8f67f8ae | 3894 | DIFF_OPT_SET(options, ALLOW_EXTERNAL); |
72909bef | 3895 | else if (!strcmp(arg, "--no-ext-diff")) |
8f67f8ae | 3896 | DIFF_OPT_CLR(options, ALLOW_EXTERNAL); |
e10ea812 JK |
3897 | else if (!strcmp(arg, "--textconv")) |
3898 | DIFF_OPT_SET(options, ALLOW_TEXTCONV); | |
3899 | else if (!strcmp(arg, "--no-textconv")) | |
3900 | DIFF_OPT_CLR(options, ALLOW_TEXTCONV); | |
aee9c7d6 JL |
3901 | else if (!strcmp(arg, "--ignore-submodules")) { |
3902 | DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); | |
46a958b3 | 3903 | handle_ignore_submodules_arg(options, "all"); |
ae021d87 | 3904 | } else if (skip_prefix(arg, "--ignore-submodules=", &arg)) { |
aee9c7d6 | 3905 | DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); |
ae021d87 | 3906 | handle_ignore_submodules_arg(options, arg); |
aee9c7d6 | 3907 | } else if (!strcmp(arg, "--submodule")) |
752c0c24 | 3908 | DIFF_OPT_SET(options, SUBMODULE_LOG); |
ae021d87 JK |
3909 | else if (skip_prefix(arg, "--submodule=", &arg)) |
3910 | return parse_submodule_opt(options, arg); | |
b8767f79 JH |
3911 | else if (skip_prefix(arg, "--ws-error-highlight=", &arg)) |
3912 | return parse_ws_error_highlight(options, arg); | |
d054680c PH |
3913 | |
3914 | /* misc options */ | |
3915 | else if (!strcmp(arg, "-z")) | |
3916 | options->line_termination = 0; | |
dea007fb MM |
3917 | else if ((argcount = short_opt('l', av, &optarg))) { |
3918 | options->rename_limit = strtoul(optarg, NULL, 10); | |
3919 | return argcount; | |
3920 | } | |
3921 | else if ((argcount = short_opt('S', av, &optarg))) { | |
3922 | options->pickaxe = optarg; | |
f506b8e8 JH |
3923 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_S; |
3924 | return argcount; | |
3925 | } else if ((argcount = short_opt('G', av, &optarg))) { | |
3926 | options->pickaxe = optarg; | |
3927 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_G; | |
dea007fb MM |
3928 | return argcount; |
3929 | } | |
d054680c | 3930 | else if (!strcmp(arg, "--pickaxe-all")) |
f506b8e8 | 3931 | options->pickaxe_opts |= DIFF_PICKAXE_ALL; |
d054680c | 3932 | else if (!strcmp(arg, "--pickaxe-regex")) |
f506b8e8 | 3933 | options->pickaxe_opts |= DIFF_PICKAXE_REGEX; |
dea007fb | 3934 | else if ((argcount = short_opt('O', av, &optarg))) { |
a97262c6 NTND |
3935 | const char *path = prefix_filename(prefix, strlen(prefix), optarg); |
3936 | options->orderfile = xstrdup(path); | |
dea007fb MM |
3937 | return argcount; |
3938 | } | |
3939 | else if ((argcount = parse_long_opt("diff-filter", av, &optarg))) { | |
1ecc1cbd JH |
3940 | int offending = parse_diff_filter_opt(optarg, options); |
3941 | if (offending) | |
3942 | die("unknown change class '%c' in --diff-filter=%s", | |
3943 | offending, optarg); | |
dea007fb MM |
3944 | return argcount; |
3945 | } | |
d054680c PH |
3946 | else if (!strcmp(arg, "--abbrev")) |
3947 | options->abbrev = DEFAULT_ABBREV; | |
ae021d87 JK |
3948 | else if (skip_prefix(arg, "--abbrev=", &arg)) { |
3949 | options->abbrev = strtoul(arg, NULL, 10); | |
d054680c PH |
3950 | if (options->abbrev < MINIMUM_ABBREV) |
3951 | options->abbrev = MINIMUM_ABBREV; | |
3952 | else if (40 < options->abbrev) | |
3953 | options->abbrev = 40; | |
3954 | } | |
dea007fb MM |
3955 | else if ((argcount = parse_long_opt("src-prefix", av, &optarg))) { |
3956 | options->a_prefix = optarg; | |
3957 | return argcount; | |
3958 | } | |
3959 | else if ((argcount = parse_long_opt("dst-prefix", av, &optarg))) { | |
3960 | options->b_prefix = optarg; | |
3961 | return argcount; | |
3962 | } | |
eab9a40b JS |
3963 | else if (!strcmp(arg, "--no-prefix")) |
3964 | options->a_prefix = options->b_prefix = ""; | |
6d0e674a RS |
3965 | else if (opt_arg(arg, '\0', "inter-hunk-context", |
3966 | &options->interhunkcontext)) | |
3967 | ; | |
14937c2c RS |
3968 | else if (!strcmp(arg, "-W")) |
3969 | DIFF_OPT_SET(options, FUNCCONTEXT); | |
3970 | else if (!strcmp(arg, "--function-context")) | |
3971 | DIFF_OPT_SET(options, FUNCCONTEXT); | |
3972 | else if (!strcmp(arg, "--no-function-context")) | |
3973 | DIFF_OPT_CLR(options, FUNCCONTEXT); | |
dea007fb | 3974 | else if ((argcount = parse_long_opt("output", av, &optarg))) { |
a97262c6 NTND |
3975 | const char *path = prefix_filename(prefix, strlen(prefix), optarg); |
3976 | options->file = fopen(path, "w"); | |
8324b977 | 3977 | if (!options->file) |
a97262c6 | 3978 | die_errno("Could not open '%s'", path); |
c0c77734 | 3979 | options->close_file = 1; |
afc676f2 JS |
3980 | if (options->use_color != GIT_COLOR_ALWAYS) |
3981 | options->use_color = GIT_COLOR_NEVER; | |
dea007fb | 3982 | return argcount; |
c0c77734 | 3983 | } else |
6973dcae JH |
3984 | return 0; |
3985 | return 1; | |
3986 | } | |
3987 | ||
10ae7526 | 3988 | int parse_rename_score(const char **cp_p) |
6973dcae JH |
3989 | { |
3990 | unsigned long num, scale; | |
3991 | int ch, dot; | |
3992 | const char *cp = *cp_p; | |
3993 | ||
3994 | num = 0; | |
3995 | scale = 1; | |
3996 | dot = 0; | |
eeefa7c9 | 3997 | for (;;) { |
6973dcae JH |
3998 | ch = *cp; |
3999 | if ( !dot && ch == '.' ) { | |
4000 | scale = 1; | |
4001 | dot = 1; | |
4002 | } else if ( ch == '%' ) { | |
4003 | scale = dot ? scale*100 : 100; | |
4004 | cp++; /* % is always at the end */ | |
4005 | break; | |
4006 | } else if ( ch >= '0' && ch <= '9' ) { | |
4007 | if ( scale < 100000 ) { | |
4008 | scale *= 10; | |
4009 | num = (num*10) + (ch-'0'); | |
4010 | } | |
4011 | } else { | |
4012 | break; | |
4013 | } | |
4014 | cp++; | |
4015 | } | |
4016 | *cp_p = cp; | |
4017 | ||
4018 | /* user says num divided by scale and we say internally that | |
4019 | * is MAX_SCORE * num / scale. | |
4020 | */ | |
dc49cd76 | 4021 | return (int)((num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale)); |
6973dcae JH |
4022 | } |
4023 | ||
16befb8b | 4024 | static int diff_scoreopt_parse(const char *opt) |
6973dcae JH |
4025 | { |
4026 | int opt1, opt2, cmd; | |
4027 | ||
4028 | if (*opt++ != '-') | |
4029 | return -1; | |
4030 | cmd = *opt++; | |
37ab5156 KB |
4031 | if (cmd == '-') { |
4032 | /* convert the long-form arguments into short-form versions */ | |
95b567c7 | 4033 | if (skip_prefix(opt, "break-rewrites", &opt)) { |
37ab5156 KB |
4034 | if (*opt == 0 || *opt++ == '=') |
4035 | cmd = 'B'; | |
95b567c7 | 4036 | } else if (skip_prefix(opt, "find-copies", &opt)) { |
37ab5156 KB |
4037 | if (*opt == 0 || *opt++ == '=') |
4038 | cmd = 'C'; | |
95b567c7 | 4039 | } else if (skip_prefix(opt, "find-renames", &opt)) { |
37ab5156 KB |
4040 | if (*opt == 0 || *opt++ == '=') |
4041 | cmd = 'M'; | |
4042 | } | |
4043 | } | |
6973dcae | 4044 | if (cmd != 'M' && cmd != 'C' && cmd != 'B') |
01689909 | 4045 | return -1; /* that is not a -M, -C, or -B option */ |
6973dcae | 4046 | |
10ae7526 | 4047 | opt1 = parse_rename_score(&opt); |
6973dcae JH |
4048 | if (cmd != 'B') |
4049 | opt2 = 0; | |
4050 | else { | |
4051 | if (*opt == 0) | |
4052 | opt2 = 0; | |
4053 | else if (*opt != '/') | |
4054 | return -1; /* we expect -B80/99 or -B80 */ | |
4055 | else { | |
4056 | opt++; | |
10ae7526 | 4057 | opt2 = parse_rename_score(&opt); |
6973dcae JH |
4058 | } |
4059 | } | |
4060 | if (*opt != 0) | |
4061 | return -1; | |
4062 | return opt1 | (opt2 << 16); | |
4063 | } | |
4064 | ||
4065 | struct diff_queue_struct diff_queued_diff; | |
4066 | ||
4067 | void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) | |
4068 | { | |
4c960a43 | 4069 | ALLOC_GROW(queue->queue, queue->nr + 1, queue->alloc); |
6973dcae JH |
4070 | queue->queue[queue->nr++] = dp; |
4071 | } | |
4072 | ||
4073 | struct diff_filepair *diff_queue(struct diff_queue_struct *queue, | |
4074 | struct diff_filespec *one, | |
4075 | struct diff_filespec *two) | |
4076 | { | |
ef677686 | 4077 | struct diff_filepair *dp = xcalloc(1, sizeof(*dp)); |
6973dcae JH |
4078 | dp->one = one; |
4079 | dp->two = two; | |
6973dcae JH |
4080 | if (queue) |
4081 | diff_q(queue, dp); | |
4082 | return dp; | |
4083 | } | |
4084 | ||
4085 | void diff_free_filepair(struct diff_filepair *p) | |
4086 | { | |
9fb88419 LT |
4087 | free_filespec(p->one); |
4088 | free_filespec(p->two); | |
6973dcae JH |
4089 | free(p); |
4090 | } | |
4091 | ||
4092 | /* This is different from find_unique_abbrev() in that | |
4093 | * it stuffs the result with dots for alignment. | |
4094 | */ | |
4095 | const char *diff_unique_abbrev(const unsigned char *sha1, int len) | |
4096 | { | |
4097 | int abblen; | |
4098 | const char *abbrev; | |
4099 | if (len == 40) | |
4100 | return sha1_to_hex(sha1); | |
4101 | ||
4102 | abbrev = find_unique_abbrev(sha1, len); | |
6973dcae JH |
4103 | abblen = strlen(abbrev); |
4104 | if (abblen < 37) { | |
4105 | static char hex[41]; | |
4106 | if (len < abblen && abblen <= len + 2) | |
5096d490 | 4107 | xsnprintf(hex, sizeof(hex), "%s%.*s", abbrev, len+3-abblen, ".."); |
6973dcae | 4108 | else |
5096d490 | 4109 | xsnprintf(hex, sizeof(hex), "%s...", abbrev); |
6973dcae JH |
4110 | return hex; |
4111 | } | |
4112 | return sha1_to_hex(sha1); | |
4113 | } | |
4114 | ||
663af342 | 4115 | static void diff_flush_raw(struct diff_filepair *p, struct diff_options *opt) |
6973dcae | 4116 | { |
663af342 PH |
4117 | int line_termination = opt->line_termination; |
4118 | int inter_name_termination = line_termination ? '\t' : '\0'; | |
6973dcae | 4119 | |
30997bb8 | 4120 | fprintf(opt->file, "%s", diff_line_prefix(opt)); |
663af342 | 4121 | if (!(opt->output_format & DIFF_FORMAT_NAME_STATUS)) { |
c0c77734 | 4122 | fprintf(opt->file, ":%06o %06o %s ", p->one->mode, p->two->mode, |
a0d12c44 | 4123 | diff_unique_abbrev(p->one->oid.hash, opt->abbrev)); |
4124 | fprintf(opt->file, "%s ", | |
4125 | diff_unique_abbrev(p->two->oid.hash, opt->abbrev)); | |
6973dcae | 4126 | } |
663af342 | 4127 | if (p->score) { |
c0c77734 DB |
4128 | fprintf(opt->file, "%c%03d%c", p->status, similarity_index(p), |
4129 | inter_name_termination); | |
663af342 | 4130 | } else { |
c0c77734 | 4131 | fprintf(opt->file, "%c%c", p->status, inter_name_termination); |
6973dcae | 4132 | } |
6973dcae | 4133 | |
cd676a51 JH |
4134 | if (p->status == DIFF_STATUS_COPIED || |
4135 | p->status == DIFF_STATUS_RENAMED) { | |
4136 | const char *name_a, *name_b; | |
4137 | name_a = p->one->path; | |
4138 | name_b = p->two->path; | |
4139 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 DB |
4140 | write_name_quoted(name_a, opt->file, inter_name_termination); |
4141 | write_name_quoted(name_b, opt->file, line_termination); | |
663af342 | 4142 | } else { |
cd676a51 JH |
4143 | const char *name_a, *name_b; |
4144 | name_a = p->one->mode ? p->one->path : p->two->path; | |
4145 | name_b = NULL; | |
4146 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 | 4147 | write_name_quoted(name_a, opt->file, line_termination); |
663af342 | 4148 | } |
6973dcae JH |
4149 | } |
4150 | ||
4151 | int diff_unmodified_pair(struct diff_filepair *p) | |
4152 | { | |
4153 | /* This function is written stricter than necessary to support | |
4154 | * the currently implemented transformers, but the idea is to | |
4155 | * let transformers to produce diff_filepairs any way they want, | |
4156 | * and filter and clean them up here before producing the output. | |
4157 | */ | |
663af342 | 4158 | struct diff_filespec *one = p->one, *two = p->two; |
6973dcae JH |
4159 | |
4160 | if (DIFF_PAIR_UNMERGED(p)) | |
4161 | return 0; /* unmerged is interesting */ | |
4162 | ||
6973dcae JH |
4163 | /* deletion, addition, mode or type change |
4164 | * and rename are all interesting. | |
4165 | */ | |
4166 | if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || | |
4167 | DIFF_PAIR_MODE_CHANGED(p) || | |
4168 | strcmp(one->path, two->path)) | |
4169 | return 0; | |
4170 | ||
4171 | /* both are valid and point at the same path. that is, we are | |
4172 | * dealing with a change. | |
4173 | */ | |
41c9560e | 4174 | if (one->oid_valid && two->oid_valid && |
a0d12c44 | 4175 | !oidcmp(&one->oid, &two->oid) && |
85adbf2f | 4176 | !one->dirty_submodule && !two->dirty_submodule) |
6973dcae | 4177 | return 1; /* no change */ |
41c9560e | 4178 | if (!one->oid_valid && !two->oid_valid) |
6973dcae JH |
4179 | return 1; /* both look at the same file on the filesystem. */ |
4180 | return 0; | |
4181 | } | |
4182 | ||
4183 | static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) | |
4184 | { | |
4185 | if (diff_unmodified_pair(p)) | |
4186 | return; | |
4187 | ||
4188 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4189 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
4190 | return; /* no tree diffs in patch format */ | |
4191 | ||
4192 | run_diff(p, o); | |
4193 | } | |
4194 | ||
4195 | static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, | |
4196 | struct diffstat_t *diffstat) | |
4197 | { | |
4198 | if (diff_unmodified_pair(p)) | |
4199 | return; | |
4200 | ||
4201 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4202 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
c3fced64 | 4203 | return; /* no useful stat for tree diffs */ |
6973dcae JH |
4204 | |
4205 | run_diffstat(p, o, diffstat); | |
4206 | } | |
4207 | ||
88246898 JS |
4208 | static void diff_flush_checkdiff(struct diff_filepair *p, |
4209 | struct diff_options *o) | |
4210 | { | |
4211 | if (diff_unmodified_pair(p)) | |
4212 | return; | |
4213 | ||
4214 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4215 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
c3fced64 | 4216 | return; /* nothing to check in tree diffs */ |
88246898 JS |
4217 | |
4218 | run_checkdiff(p, o); | |
4219 | } | |
4220 | ||
6973dcae JH |
4221 | int diff_queue_is_empty(void) |
4222 | { | |
4223 | struct diff_queue_struct *q = &diff_queued_diff; | |
4224 | int i; | |
4225 | for (i = 0; i < q->nr; i++) | |
4226 | if (!diff_unmodified_pair(q->queue[i])) | |
4227 | return 0; | |
4228 | return 1; | |
4229 | } | |
4230 | ||
4231 | #if DIFF_DEBUG | |
4232 | void diff_debug_filespec(struct diff_filespec *s, int x, const char *one) | |
4233 | { | |
4234 | fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n", | |
4235 | x, one ? one : "", | |
4236 | s->path, | |
4237 | DIFF_FILE_VALID(s) ? "valid" : "invalid", | |
4238 | s->mode, | |
41c9560e | 4239 | s->oid_valid ? oid_to_hex(&s->oid) : ""); |
428d52a5 | 4240 | fprintf(stderr, "queue[%d] %s size %lu\n", |
6973dcae | 4241 | x, one ? one : "", |
428d52a5 | 4242 | s->size); |
6973dcae JH |
4243 | } |
4244 | ||
4245 | void diff_debug_filepair(const struct diff_filepair *p, int i) | |
4246 | { | |
4247 | diff_debug_filespec(p->one, i, "one"); | |
4248 | diff_debug_filespec(p->two, i, "two"); | |
64479711 | 4249 | fprintf(stderr, "score %d, status %c rename_used %d broken %d\n", |
6973dcae | 4250 | p->score, p->status ? p->status : '?', |
64479711 | 4251 | p->one->rename_used, p->broken_pair); |
6973dcae JH |
4252 | } |
4253 | ||
4254 | void diff_debug_queue(const char *msg, struct diff_queue_struct *q) | |
4255 | { | |
4256 | int i; | |
4257 | if (msg) | |
4258 | fprintf(stderr, "%s\n", msg); | |
4259 | fprintf(stderr, "q->nr = %d\n", q->nr); | |
4260 | for (i = 0; i < q->nr; i++) { | |
4261 | struct diff_filepair *p = q->queue[i]; | |
4262 | diff_debug_filepair(p, i); | |
4263 | } | |
4264 | } | |
4265 | #endif | |
4266 | ||
4267 | static void diff_resolve_rename_copy(void) | |
4268 | { | |
64479711 LT |
4269 | int i; |
4270 | struct diff_filepair *p; | |
6973dcae JH |
4271 | struct diff_queue_struct *q = &diff_queued_diff; |
4272 | ||
4273 | diff_debug_queue("resolve-rename-copy", q); | |
4274 | ||
4275 | for (i = 0; i < q->nr; i++) { | |
4276 | p = q->queue[i]; | |
4277 | p->status = 0; /* undecided */ | |
4278 | if (DIFF_PAIR_UNMERGED(p)) | |
4279 | p->status = DIFF_STATUS_UNMERGED; | |
4280 | else if (!DIFF_FILE_VALID(p->one)) | |
4281 | p->status = DIFF_STATUS_ADDED; | |
4282 | else if (!DIFF_FILE_VALID(p->two)) | |
4283 | p->status = DIFF_STATUS_DELETED; | |
4284 | else if (DIFF_PAIR_TYPE_CHANGED(p)) | |
4285 | p->status = DIFF_STATUS_TYPE_CHANGED; | |
4286 | ||
4287 | /* from this point on, we are dealing with a pair | |
4288 | * whose both sides are valid and of the same type, i.e. | |
4289 | * either in-place edit or rename/copy edit. | |
4290 | */ | |
4291 | else if (DIFF_PAIR_RENAME(p)) { | |
64479711 LT |
4292 | /* |
4293 | * A rename might have re-connected a broken | |
4294 | * pair up, causing the pathnames to be the | |
4295 | * same again. If so, that's not a rename at | |
4296 | * all, just a modification.. | |
4297 | * | |
4298 | * Otherwise, see if this source was used for | |
4299 | * multiple renames, in which case we decrement | |
4300 | * the count, and call it a copy. | |
6973dcae | 4301 | */ |
64479711 LT |
4302 | if (!strcmp(p->one->path, p->two->path)) |
4303 | p->status = DIFF_STATUS_MODIFIED; | |
4304 | else if (--p->one->rename_used > 0) | |
6973dcae | 4305 | p->status = DIFF_STATUS_COPIED; |
64479711 | 4306 | else |
6973dcae JH |
4307 | p->status = DIFF_STATUS_RENAMED; |
4308 | } | |
a0d12c44 | 4309 | else if (oidcmp(&p->one->oid, &p->two->oid) || |
d516c2d1 | 4310 | p->one->mode != p->two->mode || |
85adbf2f JL |
4311 | p->one->dirty_submodule || |
4312 | p->two->dirty_submodule || | |
a0d12c44 | 4313 | is_null_oid(&p->one->oid)) |
6973dcae JH |
4314 | p->status = DIFF_STATUS_MODIFIED; |
4315 | else { | |
4316 | /* This is a "no-change" entry and should not | |
4317 | * happen anymore, but prepare for broken callers. | |
4318 | */ | |
4319 | error("feeding unmodified %s to diffcore", | |
4320 | p->one->path); | |
4321 | p->status = DIFF_STATUS_UNKNOWN; | |
4322 | } | |
4323 | } | |
4324 | diff_debug_queue("resolve-rename-copy done", q); | |
4325 | } | |
4326 | ||
c6744349 | 4327 | static int check_pair_status(struct diff_filepair *p) |
6973dcae | 4328 | { |
6973dcae JH |
4329 | switch (p->status) { |
4330 | case DIFF_STATUS_UNKNOWN: | |
c6744349 | 4331 | return 0; |
6973dcae JH |
4332 | case 0: |
4333 | die("internal error in diff-resolve-rename-copy"); | |
6973dcae | 4334 | default: |
c6744349 | 4335 | return 1; |
6973dcae JH |
4336 | } |
4337 | } | |
4338 | ||
c6744349 TH |
4339 | static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt) |
4340 | { | |
4341 | int fmt = opt->output_format; | |
4342 | ||
4343 | if (fmt & DIFF_FORMAT_CHECKDIFF) | |
4344 | diff_flush_checkdiff(p, opt); | |
4345 | else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) | |
4346 | diff_flush_raw(p, opt); | |
cd676a51 JH |
4347 | else if (fmt & DIFF_FORMAT_NAME) { |
4348 | const char *name_a, *name_b; | |
4349 | name_a = p->two->path; | |
4350 | name_b = NULL; | |
4351 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 | 4352 | write_name_quoted(name_a, opt->file, opt->line_termination); |
cd676a51 | 4353 | } |
c6744349 TH |
4354 | } |
4355 | ||
c0c77734 | 4356 | static void show_file_mode_name(FILE *file, const char *newdelete, struct diff_filespec *fs) |
4bbd261b SE |
4357 | { |
4358 | if (fs->mode) | |
c0c77734 | 4359 | fprintf(file, " %s mode %06o ", newdelete, fs->mode); |
4bbd261b | 4360 | else |
c0c77734 DB |
4361 | fprintf(file, " %s ", newdelete); |
4362 | write_name_quoted(fs->path, file, '\n'); | |
4bbd261b SE |
4363 | } |
4364 | ||
4365 | ||
7be57610 BY |
4366 | static void show_mode_change(FILE *file, struct diff_filepair *p, int show_name, |
4367 | const char *line_prefix) | |
4bbd261b SE |
4368 | { |
4369 | if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) { | |
7be57610 BY |
4370 | fprintf(file, "%s mode change %06o => %06o%c", line_prefix, p->one->mode, |
4371 | p->two->mode, show_name ? ' ' : '\n'); | |
0d26a64e | 4372 | if (show_name) { |
c0c77734 | 4373 | write_name_quoted(p->two->path, file, '\n'); |
0d26a64e | 4374 | } |
4bbd261b SE |
4375 | } |
4376 | } | |
4377 | ||
7be57610 BY |
4378 | static void show_rename_copy(FILE *file, const char *renamecopy, struct diff_filepair *p, |
4379 | const char *line_prefix) | |
4bbd261b | 4380 | { |
b9f44164 | 4381 | char *names = pprint_rename(p->one->path, p->two->path); |
4bbd261b | 4382 | |
c0c77734 | 4383 | fprintf(file, " %s %s (%d%%)\n", renamecopy, names, similarity_index(p)); |
b9f44164 | 4384 | free(names); |
7be57610 | 4385 | show_mode_change(file, p, 0, line_prefix); |
4bbd261b SE |
4386 | } |
4387 | ||
7be57610 | 4388 | static void diff_summary(struct diff_options *opt, struct diff_filepair *p) |
4bbd261b | 4389 | { |
7be57610 | 4390 | FILE *file = opt->file; |
30997bb8 | 4391 | const char *line_prefix = diff_line_prefix(opt); |
7be57610 | 4392 | |
4bbd261b SE |
4393 | switch(p->status) { |
4394 | case DIFF_STATUS_DELETED: | |
7be57610 | 4395 | fputs(line_prefix, file); |
c0c77734 | 4396 | show_file_mode_name(file, "delete", p->one); |
4bbd261b SE |
4397 | break; |
4398 | case DIFF_STATUS_ADDED: | |
7be57610 | 4399 | fputs(line_prefix, file); |
c0c77734 | 4400 | show_file_mode_name(file, "create", p->two); |
4bbd261b SE |
4401 | break; |
4402 | case DIFF_STATUS_COPIED: | |
7be57610 BY |
4403 | fputs(line_prefix, file); |
4404 | show_rename_copy(file, "copy", p, line_prefix); | |
4bbd261b SE |
4405 | break; |
4406 | case DIFF_STATUS_RENAMED: | |
7be57610 BY |
4407 | fputs(line_prefix, file); |
4408 | show_rename_copy(file, "rename", p, line_prefix); | |
4bbd261b SE |
4409 | break; |
4410 | default: | |
4411 | if (p->score) { | |
7be57610 | 4412 | fprintf(file, "%s rewrite ", line_prefix); |
c0c77734 DB |
4413 | write_name_quoted(p->two->path, file, ' '); |
4414 | fprintf(file, "(%d%%)\n", similarity_index(p)); | |
663af342 | 4415 | } |
7be57610 | 4416 | show_mode_change(file, p, !p->score, line_prefix); |
4bbd261b SE |
4417 | break; |
4418 | } | |
4419 | } | |
4420 | ||
fcb3d0ad | 4421 | struct patch_id_t { |
9126f009 | 4422 | git_SHA_CTX *ctx; |
fcb3d0ad JS |
4423 | int patchlen; |
4424 | }; | |
4425 | ||
4426 | static int remove_space(char *line, int len) | |
4427 | { | |
4428 | int i; | |
663af342 PH |
4429 | char *dst = line; |
4430 | unsigned char c; | |
fcb3d0ad | 4431 | |
663af342 PH |
4432 | for (i = 0; i < len; i++) |
4433 | if (!isspace((c = line[i]))) | |
4434 | *dst++ = c; | |
fcb3d0ad | 4435 | |
663af342 | 4436 | return dst - line; |
fcb3d0ad JS |
4437 | } |
4438 | ||
4439 | static void patch_id_consume(void *priv, char *line, unsigned long len) | |
4440 | { | |
4441 | struct patch_id_t *data = priv; | |
4442 | int new_len; | |
4443 | ||
4444 | /* Ignore line numbers when computing the SHA1 of the patch */ | |
59556548 | 4445 | if (starts_with(line, "@@ -")) |
fcb3d0ad JS |
4446 | return; |
4447 | ||
4448 | new_len = remove_space(line, len); | |
4449 | ||
9126f009 | 4450 | git_SHA1_Update(data->ctx, line, new_len); |
fcb3d0ad JS |
4451 | data->patchlen += new_len; |
4452 | } | |
4453 | ||
4454 | /* returns 0 upon success, and writes result into sha1 */ | |
3e8e32c3 | 4455 | static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1, int diff_header_only) |
fcb3d0ad JS |
4456 | { |
4457 | struct diff_queue_struct *q = &diff_queued_diff; | |
4458 | int i; | |
9126f009 | 4459 | git_SHA_CTX ctx; |
fcb3d0ad JS |
4460 | struct patch_id_t data; |
4461 | char buffer[PATH_MAX * 4 + 20]; | |
4462 | ||
9126f009 | 4463 | git_SHA1_Init(&ctx); |
fcb3d0ad JS |
4464 | memset(&data, 0, sizeof(struct patch_id_t)); |
4465 | data.ctx = &ctx; | |
fcb3d0ad JS |
4466 | |
4467 | for (i = 0; i < q->nr; i++) { | |
4468 | xpparam_t xpp; | |
4469 | xdemitconf_t xecfg; | |
fcb3d0ad JS |
4470 | mmfile_t mf1, mf2; |
4471 | struct diff_filepair *p = q->queue[i]; | |
4472 | int len1, len2; | |
4473 | ||
9ccd0a88 | 4474 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 4475 | memset(&xecfg, 0, sizeof(xecfg)); |
fcb3d0ad JS |
4476 | if (p->status == 0) |
4477 | return error("internal diff status error"); | |
4478 | if (p->status == DIFF_STATUS_UNKNOWN) | |
4479 | continue; | |
4480 | if (diff_unmodified_pair(p)) | |
4481 | continue; | |
4482 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4483 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
4484 | continue; | |
4485 | if (DIFF_PAIR_UNMERGED(p)) | |
4486 | continue; | |
4487 | ||
4488 | diff_fill_sha1_info(p->one); | |
4489 | diff_fill_sha1_info(p->two); | |
fcb3d0ad | 4490 | |
fcb3d0ad JS |
4491 | len1 = remove_space(p->one->path, strlen(p->one->path)); |
4492 | len2 = remove_space(p->two->path, strlen(p->two->path)); | |
4493 | if (p->one->mode == 0) | |
4494 | len1 = snprintf(buffer, sizeof(buffer), | |
4495 | "diff--gita/%.*sb/%.*s" | |
4496 | "newfilemode%06o" | |
4497 | "---/dev/null" | |
4498 | "+++b/%.*s", | |
4499 | len1, p->one->path, | |
4500 | len2, p->two->path, | |
4501 | p->two->mode, | |
4502 | len2, p->two->path); | |
4503 | else if (p->two->mode == 0) | |
4504 | len1 = snprintf(buffer, sizeof(buffer), | |
4505 | "diff--gita/%.*sb/%.*s" | |
4506 | "deletedfilemode%06o" | |
4507 | "---a/%.*s" | |
4508 | "+++/dev/null", | |
4509 | len1, p->one->path, | |
4510 | len2, p->two->path, | |
4511 | p->one->mode, | |
4512 | len1, p->one->path); | |
4513 | else | |
4514 | len1 = snprintf(buffer, sizeof(buffer), | |
4515 | "diff--gita/%.*sb/%.*s" | |
4516 | "---a/%.*s" | |
4517 | "+++b/%.*s", | |
4518 | len1, p->one->path, | |
4519 | len2, p->two->path, | |
4520 | len1, p->one->path, | |
4521 | len2, p->two->path); | |
9126f009 | 4522 | git_SHA1_Update(&ctx, buffer, len1); |
fcb3d0ad | 4523 | |
3e8e32c3 KW |
4524 | if (diff_header_only) |
4525 | continue; | |
4526 | ||
4527 | if (fill_mmfile(&mf1, p->one) < 0 || | |
4528 | fill_mmfile(&mf2, p->two) < 0) | |
4529 | return error("unable to read files to diff"); | |
4530 | ||
34597c1f CB |
4531 | if (diff_filespec_is_binary(p->one) || |
4532 | diff_filespec_is_binary(p->two)) { | |
a0d12c44 | 4533 | git_SHA1_Update(&ctx, oid_to_hex(&p->one->oid), |
4534 | 40); | |
4535 | git_SHA1_Update(&ctx, oid_to_hex(&p->two->oid), | |
4536 | 40); | |
34597c1f CB |
4537 | continue; |
4538 | } | |
4539 | ||
582aa00b | 4540 | xpp.flags = 0; |
fcb3d0ad | 4541 | xecfg.ctxlen = 3; |
ad14b450 | 4542 | xecfg.flags = 0; |
3efb9880 JK |
4543 | if (xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data, |
4544 | &xpp, &xecfg)) | |
4545 | return error("unable to generate patch-id diff for %s", | |
4546 | p->one->path); | |
fcb3d0ad JS |
4547 | } |
4548 | ||
9126f009 | 4549 | git_SHA1_Final(sha1, &ctx); |
fcb3d0ad JS |
4550 | return 0; |
4551 | } | |
4552 | ||
3e8e32c3 | 4553 | int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1, int diff_header_only) |
fcb3d0ad JS |
4554 | { |
4555 | struct diff_queue_struct *q = &diff_queued_diff; | |
4556 | int i; | |
3e8e32c3 | 4557 | int result = diff_get_patch_id(options, sha1, diff_header_only); |
fcb3d0ad JS |
4558 | |
4559 | for (i = 0; i < q->nr; i++) | |
4560 | diff_free_filepair(q->queue[i]); | |
4561 | ||
4562 | free(q->queue); | |
9ca5df90 | 4563 | DIFF_QUEUE_CLEAR(q); |
fcb3d0ad JS |
4564 | |
4565 | return result; | |
4566 | } | |
4567 | ||
946c3784 | 4568 | static int is_summary_empty(const struct diff_queue_struct *q) |
6973dcae | 4569 | { |
6973dcae | 4570 | int i; |
6973dcae | 4571 | |
946c3784 TH |
4572 | for (i = 0; i < q->nr; i++) { |
4573 | const struct diff_filepair *p = q->queue[i]; | |
4574 | ||
4575 | switch (p->status) { | |
4576 | case DIFF_STATUS_DELETED: | |
4577 | case DIFF_STATUS_ADDED: | |
4578 | case DIFF_STATUS_COPIED: | |
4579 | case DIFF_STATUS_RENAMED: | |
4580 | return 0; | |
4581 | default: | |
4582 | if (p->score) | |
4583 | return 0; | |
4584 | if (p->one->mode && p->two->mode && | |
4585 | p->one->mode != p->two->mode) | |
4586 | return 0; | |
4587 | break; | |
4588 | } | |
6973dcae | 4589 | } |
946c3784 TH |
4590 | return 1; |
4591 | } | |
4592 | ||
f31027c9 JH |
4593 | static const char rename_limit_warning[] = |
4594 | "inexact rename detection was skipped due to too many files."; | |
4595 | ||
4596 | static const char degrade_cc_to_c_warning[] = | |
4597 | "only found copies from modified paths due to too many files."; | |
4598 | ||
4599 | static const char rename_limit_advice[] = | |
4600 | "you may want to set your %s variable to at least " | |
4601 | "%d and retry the command."; | |
4602 | ||
4603 | void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc) | |
4604 | { | |
4605 | if (degraded_cc) | |
4606 | warning(degrade_cc_to_c_warning); | |
4607 | else if (needed) | |
4608 | warning(rename_limit_warning); | |
4609 | else | |
4610 | return; | |
4611 | if (0 < needed && needed < 32767) | |
4612 | warning(rename_limit_advice, varname, needed); | |
4613 | } | |
4614 | ||
6973dcae JH |
4615 | void diff_flush(struct diff_options *options) |
4616 | { | |
4617 | struct diff_queue_struct *q = &diff_queued_diff; | |
c6744349 | 4618 | int i, output_format = options->output_format; |
946c3784 | 4619 | int separator = 0; |
1c57a627 | 4620 | int dirstat_by_line = 0; |
6973dcae | 4621 | |
c6744349 TH |
4622 | /* |
4623 | * Order: raw, stat, summary, patch | |
4624 | * or: name/name-status/checkdiff (other bits clear) | |
4625 | */ | |
946c3784 TH |
4626 | if (!q->nr) |
4627 | goto free_queue; | |
6973dcae | 4628 | |
c6744349 TH |
4629 | if (output_format & (DIFF_FORMAT_RAW | |
4630 | DIFF_FORMAT_NAME | | |
4631 | DIFF_FORMAT_NAME_STATUS | | |
4632 | DIFF_FORMAT_CHECKDIFF)) { | |
6973dcae JH |
4633 | for (i = 0; i < q->nr; i++) { |
4634 | struct diff_filepair *p = q->queue[i]; | |
c6744349 TH |
4635 | if (check_pair_status(p)) |
4636 | flush_one_pair(p, options); | |
6973dcae | 4637 | } |
946c3784 | 4638 | separator++; |
6973dcae | 4639 | } |
c6744349 | 4640 | |
1c57a627 JH |
4641 | if (output_format & DIFF_FORMAT_DIRSTAT && DIFF_OPT_TST(options, DIRSTAT_BY_LINE)) |
4642 | dirstat_by_line = 1; | |
4643 | ||
4644 | if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT) || | |
4645 | dirstat_by_line) { | |
5e2b0636 | 4646 | struct diffstat_t diffstat; |
c6744349 | 4647 | |
5e2b0636 | 4648 | memset(&diffstat, 0, sizeof(struct diffstat_t)); |
6973dcae JH |
4649 | for (i = 0; i < q->nr; i++) { |
4650 | struct diff_filepair *p = q->queue[i]; | |
c6744349 | 4651 | if (check_pair_status(p)) |
5e2b0636 | 4652 | diff_flush_stat(p, options, &diffstat); |
6973dcae | 4653 | } |
74e2abe5 JH |
4654 | if (output_format & DIFF_FORMAT_NUMSTAT) |
4655 | show_numstat(&diffstat, options); | |
4656 | if (output_format & DIFF_FORMAT_DIFFSTAT) | |
4657 | show_stats(&diffstat, options); | |
f604652e | 4658 | if (output_format & DIFF_FORMAT_SHORTSTAT) |
c0c77734 | 4659 | show_shortstats(&diffstat, options); |
ab27389a | 4660 | if (output_format & DIFF_FORMAT_DIRSTAT && dirstat_by_line) |
1c57a627 | 4661 | show_dirstat_by_line(&diffstat, options); |
f604652e | 4662 | free_diffstat_info(&diffstat); |
3969cf7d | 4663 | separator++; |
6973dcae | 4664 | } |
1c57a627 | 4665 | if ((output_format & DIFF_FORMAT_DIRSTAT) && !dirstat_by_line) |
c04a7155 | 4666 | show_dirstat(options); |
6973dcae | 4667 | |
946c3784 | 4668 | if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { |
7be57610 BY |
4669 | for (i = 0; i < q->nr; i++) { |
4670 | diff_summary(options, q->queue[i]); | |
4671 | } | |
3969cf7d | 4672 | separator++; |
6973dcae JH |
4673 | } |
4674 | ||
6977c250 LA |
4675 | if (output_format & DIFF_FORMAT_NO_OUTPUT && |
4676 | DIFF_OPT_TST(options, EXIT_WITH_STATUS) && | |
4677 | DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { | |
4678 | /* | |
4679 | * run diff_flush_patch for the exit status. setting | |
749f763d | 4680 | * options->file to /dev/null should be safe, because we |
6977c250 LA |
4681 | * aren't supposed to produce any output anyway. |
4682 | */ | |
4683 | if (options->close_file) | |
4684 | fclose(options->file); | |
4685 | options->file = fopen("/dev/null", "w"); | |
4686 | if (!options->file) | |
4687 | die_errno("Could not open /dev/null"); | |
4688 | options->close_file = 1; | |
4689 | for (i = 0; i < q->nr; i++) { | |
4690 | struct diff_filepair *p = q->queue[i]; | |
4691 | if (check_pair_status(p)) | |
4692 | diff_flush_patch(p, options); | |
4693 | if (options->found_changes) | |
4694 | break; | |
4695 | } | |
4696 | } | |
4697 | ||
c6744349 | 4698 | if (output_format & DIFF_FORMAT_PATCH) { |
946c3784 | 4699 | if (separator) { |
30997bb8 JK |
4700 | fprintf(options->file, "%s%c", |
4701 | diff_line_prefix(options), | |
4702 | options->line_termination); | |
946c3784 TH |
4703 | if (options->stat_sep) { |
4704 | /* attach patch instead of inline */ | |
c0c77734 | 4705 | fputs(options->stat_sep, options->file); |
946c3784 | 4706 | } |
c6744349 TH |
4707 | } |
4708 | ||
4709 | for (i = 0; i < q->nr; i++) { | |
4710 | struct diff_filepair *p = q->queue[i]; | |
4711 | if (check_pair_status(p)) | |
4712 | diff_flush_patch(p, options); | |
4713 | } | |
4bbd261b SE |
4714 | } |
4715 | ||
04245581 JK |
4716 | if (output_format & DIFF_FORMAT_CALLBACK) |
4717 | options->format_callback(q, options, options->format_callback_data); | |
4718 | ||
c6744349 TH |
4719 | for (i = 0; i < q->nr; i++) |
4720 | diff_free_filepair(q->queue[i]); | |
946c3784 | 4721 | free_queue: |
6973dcae | 4722 | free(q->queue); |
9ca5df90 | 4723 | DIFF_QUEUE_CLEAR(q); |
c0c77734 DB |
4724 | if (options->close_file) |
4725 | fclose(options->file); | |
f245194f JH |
4726 | |
4727 | /* | |
97bf2a08 | 4728 | * Report the content-level differences with HAS_CHANGES; |
f245194f JH |
4729 | * diff_addremove/diff_change does not set the bit when |
4730 | * DIFF_FROM_CONTENTS is in effect (e.g. with -w). | |
4731 | */ | |
4732 | if (DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { | |
4733 | if (options->found_changes) | |
4734 | DIFF_OPT_SET(options, HAS_CHANGES); | |
4735 | else | |
4736 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
4737 | } | |
6973dcae JH |
4738 | } |
4739 | ||
08578fa1 JH |
4740 | static int match_filter(const struct diff_options *options, const struct diff_filepair *p) |
4741 | { | |
4742 | return (((p->status == DIFF_STATUS_MODIFIED) && | |
4743 | ((p->score && | |
1ecc1cbd | 4744 | filter_bit_tst(DIFF_STATUS_FILTER_BROKEN, options)) || |
08578fa1 | 4745 | (!p->score && |
1ecc1cbd | 4746 | filter_bit_tst(DIFF_STATUS_MODIFIED, options)))) || |
08578fa1 | 4747 | ((p->status != DIFF_STATUS_MODIFIED) && |
1ecc1cbd | 4748 | filter_bit_tst(p->status, options))); |
08578fa1 JH |
4749 | } |
4750 | ||
949226fe | 4751 | static void diffcore_apply_filter(struct diff_options *options) |
6973dcae JH |
4752 | { |
4753 | int i; | |
4754 | struct diff_queue_struct *q = &diff_queued_diff; | |
4755 | struct diff_queue_struct outq; | |
949226fe | 4756 | |
9ca5df90 | 4757 | DIFF_QUEUE_CLEAR(&outq); |
6973dcae | 4758 | |
1ecc1cbd | 4759 | if (!options->filter) |
6973dcae JH |
4760 | return; |
4761 | ||
1ecc1cbd | 4762 | if (filter_bit_tst(DIFF_STATUS_FILTER_AON, options)) { |
6973dcae JH |
4763 | int found; |
4764 | for (i = found = 0; !found && i < q->nr; i++) { | |
08578fa1 | 4765 | if (match_filter(options, q->queue[i])) |
6973dcae JH |
4766 | found++; |
4767 | } | |
4768 | if (found) | |
4769 | return; | |
4770 | ||
4771 | /* otherwise we will clear the whole queue | |
4772 | * by copying the empty outq at the end of this | |
4773 | * function, but first clear the current entries | |
4774 | * in the queue. | |
4775 | */ | |
4776 | for (i = 0; i < q->nr; i++) | |
4777 | diff_free_filepair(q->queue[i]); | |
4778 | } | |
4779 | else { | |
4780 | /* Only the matching ones */ | |
4781 | for (i = 0; i < q->nr; i++) { | |
4782 | struct diff_filepair *p = q->queue[i]; | |
08578fa1 | 4783 | if (match_filter(options, p)) |
6973dcae JH |
4784 | diff_q(&outq, p); |
4785 | else | |
4786 | diff_free_filepair(p); | |
4787 | } | |
4788 | } | |
4789 | free(q->queue); | |
4790 | *q = outq; | |
4791 | } | |
4792 | ||
5701115a SV |
4793 | /* Check whether two filespecs with the same mode and size are identical */ |
4794 | static int diff_filespec_is_identical(struct diff_filespec *one, | |
4795 | struct diff_filespec *two) | |
4796 | { | |
2b459b48 JH |
4797 | if (S_ISGITLINK(one->mode)) |
4798 | return 0; | |
5701115a SV |
4799 | if (diff_populate_filespec(one, 0)) |
4800 | return 0; | |
4801 | if (diff_populate_filespec(two, 0)) | |
4802 | return 0; | |
4803 | return !memcmp(one->data, two->data, one->size); | |
4804 | } | |
4805 | ||
fceb9072 NTND |
4806 | static int diff_filespec_check_stat_unmatch(struct diff_filepair *p) |
4807 | { | |
f34b205f NTND |
4808 | if (p->done_skip_stat_unmatch) |
4809 | return p->skip_stat_unmatch_result; | |
4810 | ||
4811 | p->done_skip_stat_unmatch = 1; | |
4812 | p->skip_stat_unmatch_result = 0; | |
fceb9072 NTND |
4813 | /* |
4814 | * 1. Entries that come from stat info dirtiness | |
4815 | * always have both sides (iow, not create/delete), | |
4816 | * one side of the object name is unknown, with | |
4817 | * the same mode and size. Keep the ones that | |
4818 | * do not match these criteria. They have real | |
4819 | * differences. | |
4820 | * | |
4821 | * 2. At this point, the file is known to be modified, | |
4822 | * with the same mode and size, and the object | |
4823 | * name of one side is unknown. Need to inspect | |
4824 | * the identical contents. | |
4825 | */ | |
4826 | if (!DIFF_FILE_VALID(p->one) || /* (1) */ | |
4827 | !DIFF_FILE_VALID(p->two) || | |
41c9560e | 4828 | (p->one->oid_valid && p->two->oid_valid) || |
fceb9072 | 4829 | (p->one->mode != p->two->mode) || |
8e5dd3d6 NTND |
4830 | diff_populate_filespec(p->one, CHECK_SIZE_ONLY) || |
4831 | diff_populate_filespec(p->two, CHECK_SIZE_ONLY) || | |
fceb9072 NTND |
4832 | (p->one->size != p->two->size) || |
4833 | !diff_filespec_is_identical(p->one, p->two)) /* (2) */ | |
f34b205f NTND |
4834 | p->skip_stat_unmatch_result = 1; |
4835 | return p->skip_stat_unmatch_result; | |
fceb9072 NTND |
4836 | } |
4837 | ||
fb13227e JH |
4838 | static void diffcore_skip_stat_unmatch(struct diff_options *diffopt) |
4839 | { | |
4840 | int i; | |
4841 | struct diff_queue_struct *q = &diff_queued_diff; | |
4842 | struct diff_queue_struct outq; | |
9ca5df90 | 4843 | DIFF_QUEUE_CLEAR(&outq); |
fb13227e JH |
4844 | |
4845 | for (i = 0; i < q->nr; i++) { | |
4846 | struct diff_filepair *p = q->queue[i]; | |
4847 | ||
fceb9072 | 4848 | if (diff_filespec_check_stat_unmatch(p)) |
fb13227e JH |
4849 | diff_q(&outq, p); |
4850 | else { | |
4851 | /* | |
4852 | * The caller can subtract 1 from skip_stat_unmatch | |
4853 | * to determine how many paths were dirty only | |
4854 | * due to stat info mismatch. | |
4855 | */ | |
8f67f8ae | 4856 | if (!DIFF_OPT_TST(diffopt, NO_INDEX)) |
6d2d9e86 | 4857 | diffopt->skip_stat_unmatch++; |
fb13227e JH |
4858 | diff_free_filepair(p); |
4859 | } | |
4860 | } | |
4861 | free(q->queue); | |
4862 | *q = outq; | |
4863 | } | |
4864 | ||
730f7284 JH |
4865 | static int diffnamecmp(const void *a_, const void *b_) |
4866 | { | |
4867 | const struct diff_filepair *a = *((const struct diff_filepair **)a_); | |
4868 | const struct diff_filepair *b = *((const struct diff_filepair **)b_); | |
4869 | const char *name_a, *name_b; | |
4870 | ||
4871 | name_a = a->one ? a->one->path : a->two->path; | |
4872 | name_b = b->one ? b->one->path : b->two->path; | |
4873 | return strcmp(name_a, name_b); | |
4874 | } | |
4875 | ||
4876 | void diffcore_fix_diff_index(struct diff_options *options) | |
4877 | { | |
4878 | struct diff_queue_struct *q = &diff_queued_diff; | |
4879 | qsort(q->queue, q->nr, sizeof(q->queue[0]), diffnamecmp); | |
4880 | } | |
4881 | ||
6973dcae JH |
4882 | void diffcore_std(struct diff_options *options) |
4883 | { | |
7195fbfa | 4884 | /* NOTE please keep the following in sync with diff_tree_combined() */ |
9d865356 | 4885 | if (options->skip_stat_unmatch) |
fb13227e | 4886 | diffcore_skip_stat_unmatch(options); |
44c48a90 JH |
4887 | if (!options->found_follow) { |
4888 | /* See try_to_follow_renames() in tree-diff.c */ | |
4889 | if (options->break_opt != -1) | |
4890 | diffcore_break(options->break_opt); | |
4891 | if (options->detect_rename) | |
4892 | diffcore_rename(options); | |
4893 | if (options->break_opt != -1) | |
4894 | diffcore_merge_broken(); | |
4895 | } | |
6973dcae | 4896 | if (options->pickaxe) |
382f013b | 4897 | diffcore_pickaxe(options); |
6973dcae JH |
4898 | if (options->orderfile) |
4899 | diffcore_order(options->orderfile); | |
44c48a90 JH |
4900 | if (!options->found_follow) |
4901 | /* See try_to_follow_renames() in tree-diff.c */ | |
4902 | diff_resolve_rename_copy(); | |
949226fe | 4903 | diffcore_apply_filter(options); |
68aacb2f | 4904 | |
f245194f | 4905 | if (diff_queued_diff.nr && !DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
8f67f8ae PH |
4906 | DIFF_OPT_SET(options, HAS_CHANGES); |
4907 | else | |
4908 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
1da6175d | 4909 | |
44c48a90 | 4910 | options->found_follow = 0; |
6973dcae JH |
4911 | } |
4912 | ||
da31b358 JH |
4913 | int diff_result_code(struct diff_options *opt, int status) |
4914 | { | |
4915 | int result = 0; | |
f31027c9 | 4916 | |
c9fc4415 | 4917 | diff_warn_rename_limit("diff.renameLimit", |
f31027c9 JH |
4918 | opt->needed_rename_limit, |
4919 | opt->degraded_cc_to_c); | |
da31b358 JH |
4920 | if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && |
4921 | !(opt->output_format & DIFF_FORMAT_CHECKDIFF)) | |
4922 | return status; | |
4923 | if (DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
4924 | DIFF_OPT_TST(opt, HAS_CHANGES)) | |
4925 | result |= 01; | |
4926 | if ((opt->output_format & DIFF_FORMAT_CHECKDIFF) && | |
4927 | DIFF_OPT_TST(opt, CHECK_FAILED)) | |
4928 | result |= 02; | |
4929 | return result; | |
4930 | } | |
6973dcae | 4931 | |
28b9264d JH |
4932 | int diff_can_quit_early(struct diff_options *opt) |
4933 | { | |
4934 | return (DIFF_OPT_TST(opt, QUICK) && | |
4935 | !opt->filter && | |
4936 | DIFF_OPT_TST(opt, HAS_CHANGES)); | |
4937 | } | |
4938 | ||
aee9c7d6 JL |
4939 | /* |
4940 | * Shall changes to this submodule be ignored? | |
4941 | * | |
4942 | * Submodule changes can be configured to be ignored separately for each path, | |
4943 | * but that configuration can be overridden from the command line. | |
4944 | */ | |
4945 | static int is_submodule_ignored(const char *path, struct diff_options *options) | |
4946 | { | |
4947 | int ignored = 0; | |
4948 | unsigned orig_flags = options->flags; | |
4949 | if (!DIFF_OPT_TST(options, OVERRIDE_SUBMODULE_CONFIG)) | |
4950 | set_diffopt_flags_from_submodule_config(options, path); | |
4951 | if (DIFF_OPT_TST(options, IGNORE_SUBMODULES)) | |
4952 | ignored = 1; | |
4953 | options->flags = orig_flags; | |
4954 | return ignored; | |
4955 | } | |
4956 | ||
6973dcae JH |
4957 | void diff_addremove(struct diff_options *options, |
4958 | int addremove, unsigned mode, | |
4959 | const unsigned char *sha1, | |
e5450100 | 4960 | int sha1_valid, |
e3d42c47 | 4961 | const char *concatpath, unsigned dirty_submodule) |
6973dcae | 4962 | { |
6973dcae JH |
4963 | struct diff_filespec *one, *two; |
4964 | ||
aee9c7d6 | 4965 | if (S_ISGITLINK(mode) && is_submodule_ignored(concatpath, options)) |
50fd9bd8 JS |
4966 | return; |
4967 | ||
6973dcae JH |
4968 | /* This may look odd, but it is a preparation for |
4969 | * feeding "there are unchanged files which should | |
4970 | * not produce diffs, but when you are doing copy | |
4971 | * detection you would need them, so here they are" | |
4972 | * entries to the diff-core. They will be prefixed | |
4973 | * with something like '=' or '*' (I haven't decided | |
4974 | * which but should not make any difference). | |
a6080a0a | 4975 | * Feeding the same new and old to diff_change() |
6973dcae JH |
4976 | * also has the same effect. |
4977 | * Before the final output happens, they are pruned after | |
4978 | * merged into rename/copy pairs as appropriate. | |
4979 | */ | |
8f67f8ae | 4980 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) |
6973dcae JH |
4981 | addremove = (addremove == '+' ? '-' : |
4982 | addremove == '-' ? '+' : addremove); | |
4983 | ||
cd676a51 JH |
4984 | if (options->prefix && |
4985 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
4986 | return; | |
4987 | ||
6973dcae JH |
4988 | one = alloc_filespec(concatpath); |
4989 | two = alloc_filespec(concatpath); | |
4990 | ||
4991 | if (addremove != '+') | |
e5450100 | 4992 | fill_filespec(one, sha1, sha1_valid, mode); |
e3d42c47 | 4993 | if (addremove != '-') { |
e5450100 | 4994 | fill_filespec(two, sha1, sha1_valid, mode); |
e3d42c47 JL |
4995 | two->dirty_submodule = dirty_submodule; |
4996 | } | |
6973dcae JH |
4997 | |
4998 | diff_queue(&diff_queued_diff, one, two); | |
f245194f JH |
4999 | if (!DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
5000 | DIFF_OPT_SET(options, HAS_CHANGES); | |
6973dcae JH |
5001 | } |
5002 | ||
5003 | void diff_change(struct diff_options *options, | |
5004 | unsigned old_mode, unsigned new_mode, | |
5005 | const unsigned char *old_sha1, | |
5006 | const unsigned char *new_sha1, | |
e5450100 | 5007 | int old_sha1_valid, int new_sha1_valid, |
e3d42c47 JL |
5008 | const char *concatpath, |
5009 | unsigned old_dirty_submodule, unsigned new_dirty_submodule) | |
6973dcae | 5010 | { |
6973dcae | 5011 | struct diff_filespec *one, *two; |
f34b205f | 5012 | struct diff_filepair *p; |
6973dcae | 5013 | |
aee9c7d6 JL |
5014 | if (S_ISGITLINK(old_mode) && S_ISGITLINK(new_mode) && |
5015 | is_submodule_ignored(concatpath, options)) | |
50fd9bd8 JS |
5016 | return; |
5017 | ||
8f67f8ae | 5018 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) { |
6973dcae JH |
5019 | unsigned tmp; |
5020 | const unsigned char *tmp_c; | |
5021 | tmp = old_mode; old_mode = new_mode; new_mode = tmp; | |
5022 | tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c; | |
e5450100 JK |
5023 | tmp = old_sha1_valid; old_sha1_valid = new_sha1_valid; |
5024 | new_sha1_valid = tmp; | |
e3d42c47 JL |
5025 | tmp = old_dirty_submodule; old_dirty_submodule = new_dirty_submodule; |
5026 | new_dirty_submodule = tmp; | |
6973dcae | 5027 | } |
cd676a51 JH |
5028 | |
5029 | if (options->prefix && | |
5030 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
5031 | return; | |
5032 | ||
6973dcae JH |
5033 | one = alloc_filespec(concatpath); |
5034 | two = alloc_filespec(concatpath); | |
e5450100 JK |
5035 | fill_filespec(one, old_sha1, old_sha1_valid, old_mode); |
5036 | fill_filespec(two, new_sha1, new_sha1_valid, new_mode); | |
e3d42c47 JL |
5037 | one->dirty_submodule = old_dirty_submodule; |
5038 | two->dirty_submodule = new_dirty_submodule; | |
f34b205f | 5039 | p = diff_queue(&diff_queued_diff, one, two); |
6973dcae | 5040 | |
f34b205f NTND |
5041 | if (DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
5042 | return; | |
5043 | ||
5044 | if (DIFF_OPT_TST(options, QUICK) && options->skip_stat_unmatch && | |
5045 | !diff_filespec_check_stat_unmatch(p)) | |
5046 | return; | |
5047 | ||
5048 | DIFF_OPT_SET(options, HAS_CHANGES); | |
6973dcae JH |
5049 | } |
5050 | ||
fa7b2908 | 5051 | struct diff_filepair *diff_unmerge(struct diff_options *options, const char *path) |
6973dcae | 5052 | { |
76399c01 | 5053 | struct diff_filepair *pair; |
6973dcae | 5054 | struct diff_filespec *one, *two; |
cd676a51 JH |
5055 | |
5056 | if (options->prefix && | |
5057 | strncmp(path, options->prefix, options->prefix_length)) | |
76399c01 | 5058 | return NULL; |
cd676a51 | 5059 | |
6973dcae JH |
5060 | one = alloc_filespec(path); |
5061 | two = alloc_filespec(path); | |
76399c01 JH |
5062 | pair = diff_queue(&diff_queued_diff, one, two); |
5063 | pair->is_unmerged = 1; | |
5064 | return pair; | |
6973dcae | 5065 | } |
9cb92c39 JK |
5066 | |
5067 | static char *run_textconv(const char *pgm, struct diff_filespec *spec, | |
5068 | size_t *outsize) | |
5069 | { | |
479b0ae8 | 5070 | struct diff_tempfile *temp; |
9cb92c39 JK |
5071 | const char *argv[3]; |
5072 | const char **arg = argv; | |
d3180279 | 5073 | struct child_process child = CHILD_PROCESS_INIT; |
9cb92c39 | 5074 | struct strbuf buf = STRBUF_INIT; |
da1fbed3 | 5075 | int err = 0; |
9cb92c39 | 5076 | |
479b0ae8 | 5077 | temp = prepare_temp_file(spec->path, spec); |
9cb92c39 | 5078 | *arg++ = pgm; |
479b0ae8 | 5079 | *arg++ = temp->name; |
9cb92c39 JK |
5080 | *arg = NULL; |
5081 | ||
41a457e4 | 5082 | child.use_shell = 1; |
9cb92c39 JK |
5083 | child.argv = argv; |
5084 | child.out = -1; | |
da1fbed3 | 5085 | if (start_command(&child)) { |
479b0ae8 | 5086 | remove_tempfile(); |
9cb92c39 JK |
5087 | return NULL; |
5088 | } | |
da1fbed3 JS |
5089 | |
5090 | if (strbuf_read(&buf, child.out, 0) < 0) | |
5091 | err = error("error reading from textconv command '%s'", pgm); | |
70d70999 | 5092 | close(child.out); |
da1fbed3 JS |
5093 | |
5094 | if (finish_command(&child) || err) { | |
5095 | strbuf_release(&buf); | |
5096 | remove_tempfile(); | |
5097 | return NULL; | |
5098 | } | |
479b0ae8 | 5099 | remove_tempfile(); |
9cb92c39 JK |
5100 | |
5101 | return strbuf_detach(&buf, outsize); | |
5102 | } | |
840383b2 | 5103 | |
a788d7d5 AB |
5104 | size_t fill_textconv(struct userdiff_driver *driver, |
5105 | struct diff_filespec *df, | |
5106 | char **outbuf) | |
840383b2 JK |
5107 | { |
5108 | size_t size; | |
5109 | ||
a64e6a44 | 5110 | if (!driver) { |
840383b2 JK |
5111 | if (!DIFF_FILE_VALID(df)) { |
5112 | *outbuf = ""; | |
5113 | return 0; | |
5114 | } | |
5115 | if (diff_populate_filespec(df, 0)) | |
5116 | die("unable to read files to diff"); | |
5117 | *outbuf = df->data; | |
5118 | return df->size; | |
5119 | } | |
5120 | ||
a64e6a44 JK |
5121 | if (!driver->textconv) |
5122 | die("BUG: fill_textconv called with non-textconv driver"); | |
5123 | ||
41c9560e | 5124 | if (driver->textconv_cache && df->oid_valid) { |
a0d12c44 | 5125 | *outbuf = notes_cache_get(driver->textconv_cache, |
5126 | df->oid.hash, | |
d9bae1a1 JK |
5127 | &size); |
5128 | if (*outbuf) | |
5129 | return size; | |
5130 | } | |
5131 | ||
5132 | *outbuf = run_textconv(driver->textconv, df, &size); | |
840383b2 JK |
5133 | if (!*outbuf) |
5134 | die("unable to read files to diff"); | |
d9bae1a1 | 5135 | |
41c9560e | 5136 | if (driver->textconv_cache && df->oid_valid) { |
d9bae1a1 | 5137 | /* ignore errors, as we might be in a readonly repository */ |
a0d12c44 | 5138 | notes_cache_put(driver->textconv_cache, df->oid.hash, *outbuf, |
d9bae1a1 JK |
5139 | size); |
5140 | /* | |
5141 | * we could save up changes and flush them all at the end, | |
5142 | * but we would need an extra call after all diffing is done. | |
5143 | * Since generating a cache entry is the slow path anyway, | |
5144 | * this extra overhead probably isn't a big deal. | |
5145 | */ | |
5146 | notes_cache_write(driver->textconv_cache); | |
5147 | } | |
5148 | ||
840383b2 JK |
5149 | return size; |
5150 | } | |
4914c962 NTND |
5151 | |
5152 | void setup_diff_pager(struct diff_options *opt) | |
5153 | { | |
5154 | /* | |
5155 | * If the user asked for our exit code, then either they want --quiet | |
5156 | * or --exit-code. We should definitely not bother with a pager in the | |
5157 | * former case, as we will generate no output. Since we still properly | |
5158 | * report our exit code even when a pager is run, we _could_ run a | |
5159 | * pager with --exit-code. But since we have not done so historically, | |
5160 | * and because it is easy to find people oneline advising "git diff | |
5161 | * --exit-code" in hooks and other scripts, we do not do so. | |
5162 | */ | |
5163 | if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
5164 | check_pager_config("diff") != 0) | |
5165 | setup_pager(); | |
5166 | } |