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Commit | Line | Data |
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6973dcae JH |
1 | /* |
2 | * Copyright (C) 2005 Junio C Hamano | |
3 | */ | |
6973dcae JH |
4 | #include "cache.h" |
5 | #include "quote.h" | |
6 | #include "diff.h" | |
7 | #include "diffcore.h" | |
051308f6 | 8 | #include "delta.h" |
6973dcae | 9 | #include "xdiff-interface.h" |
7c92fe0e | 10 | #include "color.h" |
8c701249 | 11 | #include "attr.h" |
d5535ec7 | 12 | #include "run-command.h" |
23707811 | 13 | #include "utf8.h" |
be58e70d | 14 | #include "userdiff.h" |
4a16d072 | 15 | #include "sigchain.h" |
752c0c24 | 16 | #include "submodule.h" |
a757c646 | 17 | #include "ll-merge.h" |
02e8ca0e | 18 | #include "string-list.h" |
6973dcae | 19 | |
1510fea7 SP |
20 | #ifdef NO_FAST_WORKING_DIRECTORY |
21 | #define FAST_WORKING_DIRECTORY 0 | |
22 | #else | |
23 | #define FAST_WORKING_DIRECTORY 1 | |
24 | #endif | |
25 | ||
96f1e58f | 26 | static int diff_detect_rename_default; |
92c57e5c | 27 | static int diff_rename_limit_default = 400; |
a624eaa7 | 28 | static int diff_suppress_blank_empty; |
d2aea137 | 29 | static int diff_use_color_default = -1; |
6468a4e5 | 30 | static int diff_context_default = 3; |
98a4d87b | 31 | static const char *diff_word_regex_cfg; |
cbe02100 | 32 | static const char *external_diff_cmd_cfg; |
aecbf914 | 33 | int diff_auto_refresh_index = 1; |
a5a818ee | 34 | static int diff_mnemonic_prefix; |
f89504dd | 35 | static int diff_no_prefix; |
df44483a | 36 | static int diff_stat_graph_width; |
712d2c7d | 37 | static int diff_dirstat_permille_default = 30; |
be4f2b40 | 38 | static struct diff_options default_diff_options; |
6973dcae | 39 | |
7c92fe0e | 40 | static char diff_colors[][COLOR_MAXLEN] = { |
dc6ebd4c AL |
41 | GIT_COLOR_RESET, |
42 | GIT_COLOR_NORMAL, /* PLAIN */ | |
43 | GIT_COLOR_BOLD, /* METAINFO */ | |
44 | GIT_COLOR_CYAN, /* FRAGINFO */ | |
45 | GIT_COLOR_RED, /* OLD */ | |
46 | GIT_COLOR_GREEN, /* NEW */ | |
47 | GIT_COLOR_YELLOW, /* COMMIT */ | |
48 | GIT_COLOR_BG_RED, /* WHITESPACE */ | |
89cb73a1 | 49 | GIT_COLOR_NORMAL, /* FUNCINFO */ |
cd112cef JS |
50 | }; |
51 | ||
801235c5 JH |
52 | static int parse_diff_color_slot(const char *var, int ofs) |
53 | { | |
54 | if (!strcasecmp(var+ofs, "plain")) | |
55 | return DIFF_PLAIN; | |
56 | if (!strcasecmp(var+ofs, "meta")) | |
57 | return DIFF_METAINFO; | |
58 | if (!strcasecmp(var+ofs, "frag")) | |
59 | return DIFF_FRAGINFO; | |
60 | if (!strcasecmp(var+ofs, "old")) | |
61 | return DIFF_FILE_OLD; | |
62 | if (!strcasecmp(var+ofs, "new")) | |
63 | return DIFF_FILE_NEW; | |
ce436973 JK |
64 | if (!strcasecmp(var+ofs, "commit")) |
65 | return DIFF_COMMIT; | |
448c3ef1 JH |
66 | if (!strcasecmp(var+ofs, "whitespace")) |
67 | return DIFF_WHITESPACE; | |
89cb73a1 BW |
68 | if (!strcasecmp(var+ofs, "func")) |
69 | return DIFF_FUNCINFO; | |
8b8e8624 | 70 | return -1; |
801235c5 JH |
71 | } |
72 | ||
02e8ca0e | 73 | static int parse_dirstat_params(struct diff_options *options, const char *params_string, |
51670fc8 | 74 | struct strbuf *errmsg) |
333f3fb0 | 75 | { |
02e8ca0e MH |
76 | char *params_copy = xstrdup(params_string); |
77 | struct string_list params = STRING_LIST_INIT_NODUP; | |
78 | int ret = 0; | |
79 | int i; | |
51670fc8 | 80 | |
02e8ca0e MH |
81 | if (*params_copy) |
82 | string_list_split_in_place(¶ms, params_copy, ',', -1); | |
83 | for (i = 0; i < params.nr; i++) { | |
84 | const char *p = params.items[i].string; | |
85 | if (!strcmp(p, "changes")) { | |
1c57a627 JH |
86 | DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); |
87 | DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); | |
02e8ca0e | 88 | } else if (!strcmp(p, "lines")) { |
1c57a627 | 89 | DIFF_OPT_SET(options, DIRSTAT_BY_LINE); |
333f3fb0 | 90 | DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); |
02e8ca0e | 91 | } else if (!strcmp(p, "files")) { |
1c57a627 | 92 | DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); |
333f3fb0 | 93 | DIFF_OPT_SET(options, DIRSTAT_BY_FILE); |
02e8ca0e | 94 | } else if (!strcmp(p, "noncumulative")) { |
333f3fb0 | 95 | DIFF_OPT_CLR(options, DIRSTAT_CUMULATIVE); |
02e8ca0e | 96 | } else if (!strcmp(p, "cumulative")) { |
333f3fb0 JH |
97 | DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE); |
98 | } else if (isdigit(*p)) { | |
99 | char *end; | |
51670fc8 JH |
100 | int permille = strtoul(p, &end, 10) * 10; |
101 | if (*end == '.' && isdigit(*++end)) { | |
712d2c7d | 102 | /* only use first digit */ |
51670fc8 | 103 | permille += *end - '0'; |
712d2c7d | 104 | /* .. and ignore any further digits */ |
51670fc8 | 105 | while (isdigit(*++end)) |
712d2c7d JH |
106 | ; /* nothing */ |
107 | } | |
02e8ca0e | 108 | if (!*end) |
51670fc8 JH |
109 | options->dirstat_permille = permille; |
110 | else { | |
02e8ca0e MH |
111 | strbuf_addf(errmsg, _(" Failed to parse dirstat cut-off percentage '%s'\n"), |
112 | p); | |
51670fc8 JH |
113 | ret++; |
114 | } | |
115 | } else { | |
02e8ca0e | 116 | strbuf_addf(errmsg, _(" Unknown dirstat parameter '%s'\n"), p); |
51670fc8 | 117 | ret++; |
333f3fb0 | 118 | } |
51670fc8 | 119 | |
333f3fb0 | 120 | } |
02e8ca0e MH |
121 | string_list_clear(¶ms, 0); |
122 | free(params_copy); | |
51670fc8 | 123 | return ret; |
333f3fb0 JH |
124 | } |
125 | ||
c47ef57c RR |
126 | static int parse_submodule_params(struct diff_options *options, const char *value) |
127 | { | |
128 | if (!strcmp(value, "log")) | |
129 | DIFF_OPT_SET(options, SUBMODULE_LOG); | |
130 | else if (!strcmp(value, "short")) | |
131 | DIFF_OPT_CLR(options, SUBMODULE_LOG); | |
132 | else | |
133 | return -1; | |
134 | return 0; | |
135 | } | |
136 | ||
cced5fbc LT |
137 | static int git_config_rename(const char *var, const char *value) |
138 | { | |
139 | if (!value) | |
140 | return DIFF_DETECT_RENAME; | |
141 | if (!strcasecmp(value, "copies") || !strcasecmp(value, "copy")) | |
142 | return DIFF_DETECT_COPY; | |
143 | return git_config_bool(var,value) ? DIFF_DETECT_RENAME : 0; | |
144 | } | |
145 | ||
83ad63cf JH |
146 | /* |
147 | * These are to give UI layer defaults. | |
148 | * The core-level commands such as git-diff-files should | |
149 | * never be affected by the setting of diff.renames | |
150 | * the user happens to have in the configuration file. | |
151 | */ | |
ef90d6d4 | 152 | int git_diff_ui_config(const char *var, const char *value, void *cb) |
801235c5 | 153 | { |
a159ca0c | 154 | if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) { |
e269eb79 | 155 | diff_use_color_default = git_config_colorbool(var, value); |
801235c5 JH |
156 | return 0; |
157 | } | |
6468a4e5 JM |
158 | if (!strcmp(var, "diff.context")) { |
159 | diff_context_default = git_config_int(var, value); | |
160 | if (diff_context_default < 0) | |
161 | return -1; | |
162 | return 0; | |
163 | } | |
b68ea12e | 164 | if (!strcmp(var, "diff.renames")) { |
cced5fbc | 165 | diff_detect_rename_default = git_config_rename(var, value); |
b68ea12e EW |
166 | return 0; |
167 | } | |
aecbf914 JH |
168 | if (!strcmp(var, "diff.autorefreshindex")) { |
169 | diff_auto_refresh_index = git_config_bool(var, value); | |
170 | return 0; | |
171 | } | |
a5a818ee JH |
172 | if (!strcmp(var, "diff.mnemonicprefix")) { |
173 | diff_mnemonic_prefix = git_config_bool(var, value); | |
174 | return 0; | |
175 | } | |
f89504dd EC |
176 | if (!strcmp(var, "diff.noprefix")) { |
177 | diff_no_prefix = git_config_bool(var, value); | |
178 | return 0; | |
179 | } | |
df44483a ZJS |
180 | if (!strcmp(var, "diff.statgraphwidth")) { |
181 | diff_stat_graph_width = git_config_int(var, value); | |
182 | return 0; | |
183 | } | |
daec808c BH |
184 | if (!strcmp(var, "diff.external")) |
185 | return git_config_string(&external_diff_cmd_cfg, var, value); | |
98a4d87b BSSJ |
186 | if (!strcmp(var, "diff.wordregex")) |
187 | return git_config_string(&diff_word_regex_cfg, var, value); | |
f1af60bd | 188 | |
be4f2b40 JS |
189 | if (!strcmp(var, "diff.ignoresubmodules")) |
190 | handle_ignore_submodules_arg(&default_diff_options, value); | |
191 | ||
c47ef57c RR |
192 | if (!strcmp(var, "diff.submodule")) { |
193 | if (parse_submodule_params(&default_diff_options, value)) | |
194 | warning(_("Unknown value for 'diff.submodule' config variable: '%s'"), | |
195 | value); | |
196 | return 0; | |
197 | } | |
198 | ||
3e1dd17a JK |
199 | if (git_color_config(var, value, cb) < 0) |
200 | return -1; | |
201 | ||
ef90d6d4 | 202 | return git_diff_basic_config(var, value, cb); |
9a1805a8 JK |
203 | } |
204 | ||
ef90d6d4 | 205 | int git_diff_basic_config(const char *var, const char *value, void *cb) |
9a1805a8 | 206 | { |
2b6ca6df LT |
207 | if (!strcmp(var, "diff.renamelimit")) { |
208 | diff_rename_limit_default = git_config_int(var, value); | |
209 | return 0; | |
210 | } | |
211 | ||
6680a087 JK |
212 | if (userdiff_config(var, value) < 0) |
213 | return -1; | |
c7534ef4 | 214 | |
1968d77d | 215 | if (!prefixcmp(var, "diff.color.") || !prefixcmp(var, "color.diff.")) { |
801235c5 | 216 | int slot = parse_diff_color_slot(var, 11); |
8b8e8624 JK |
217 | if (slot < 0) |
218 | return 0; | |
64f30e94 JH |
219 | if (!value) |
220 | return config_error_nonbool(var); | |
7c92fe0e | 221 | color_parse(value, var, diff_colors[slot]); |
801235c5 JH |
222 | return 0; |
223 | } | |
f1af60bd | 224 | |
a624eaa7 | 225 | /* like GNU diff's --suppress-blank-empty option */ |
950db879 JS |
226 | if (!strcmp(var, "diff.suppressblankempty") || |
227 | /* for backwards compatibility */ | |
228 | !strcmp(var, "diff.suppress-blank-empty")) { | |
a624eaa7 JM |
229 | diff_suppress_blank_empty = git_config_bool(var, value); |
230 | return 0; | |
231 | } | |
232 | ||
2d174951 | 233 | if (!strcmp(var, "diff.dirstat")) { |
51670fc8 | 234 | struct strbuf errmsg = STRBUF_INIT; |
712d2c7d | 235 | default_diff_options.dirstat_permille = diff_dirstat_permille_default; |
51670fc8 | 236 | if (parse_dirstat_params(&default_diff_options, value, &errmsg)) |
7478ac57 | 237 | warning(_("Found errors in 'diff.dirstat' config variable:\n%s"), |
51670fc8 JH |
238 | errmsg.buf); |
239 | strbuf_release(&errmsg); | |
712d2c7d | 240 | diff_dirstat_permille_default = default_diff_options.dirstat_permille; |
2d174951 JH |
241 | return 0; |
242 | } | |
243 | ||
aee9c7d6 JL |
244 | if (!prefixcmp(var, "submodule.")) |
245 | return parse_submodule_config_option(var, value); | |
246 | ||
3e1dd17a | 247 | return git_default_config(var, value, cb); |
801235c5 JH |
248 | } |
249 | ||
6973dcae JH |
250 | static char *quote_two(const char *one, const char *two) |
251 | { | |
252 | int need_one = quote_c_style(one, NULL, NULL, 1); | |
253 | int need_two = quote_c_style(two, NULL, NULL, 1); | |
f285a2d7 | 254 | struct strbuf res = STRBUF_INIT; |
6973dcae JH |
255 | |
256 | if (need_one + need_two) { | |
663af342 PH |
257 | strbuf_addch(&res, '"'); |
258 | quote_c_style(one, &res, NULL, 1); | |
259 | quote_c_style(two, &res, NULL, 1); | |
260 | strbuf_addch(&res, '"'); | |
261 | } else { | |
262 | strbuf_addstr(&res, one); | |
263 | strbuf_addstr(&res, two); | |
6973dcae | 264 | } |
b315c5c0 | 265 | return strbuf_detach(&res, NULL); |
6973dcae JH |
266 | } |
267 | ||
268 | static const char *external_diff(void) | |
269 | { | |
270 | static const char *external_diff_cmd = NULL; | |
271 | static int done_preparing = 0; | |
272 | ||
273 | if (done_preparing) | |
274 | return external_diff_cmd; | |
275 | external_diff_cmd = getenv("GIT_EXTERNAL_DIFF"); | |
cbe02100 JS |
276 | if (!external_diff_cmd) |
277 | external_diff_cmd = external_diff_cmd_cfg; | |
6973dcae JH |
278 | done_preparing = 1; |
279 | return external_diff_cmd; | |
280 | } | |
281 | ||
6973dcae JH |
282 | static struct diff_tempfile { |
283 | const char *name; /* filename external diff should read from */ | |
284 | char hex[41]; | |
285 | char mode[10]; | |
1472966c | 286 | char tmp_path[PATH_MAX]; |
6973dcae JH |
287 | } diff_temp[2]; |
288 | ||
6957eb9a JH |
289 | typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len); |
290 | ||
291 | struct emit_callback { | |
6957eb9a JH |
292 | int color_diff; |
293 | unsigned ws_rule; | |
294 | int blank_at_eof_in_preimage; | |
295 | int blank_at_eof_in_postimage; | |
296 | int lno_in_preimage; | |
297 | int lno_in_postimage; | |
298 | sane_truncate_fn truncate; | |
299 | const char **label_path; | |
300 | struct diff_words_data *diff_words; | |
a3c158d4 | 301 | struct diff_options *opt; |
6957eb9a | 302 | int *found_changesp; |
3e97c7c6 | 303 | struct strbuf *header; |
6957eb9a JH |
304 | }; |
305 | ||
6973dcae JH |
306 | static int count_lines(const char *data, int size) |
307 | { | |
308 | int count, ch, completely_empty = 1, nl_just_seen = 0; | |
309 | count = 0; | |
310 | while (0 < size--) { | |
311 | ch = *data++; | |
312 | if (ch == '\n') { | |
313 | count++; | |
314 | nl_just_seen = 1; | |
315 | completely_empty = 0; | |
316 | } | |
317 | else { | |
318 | nl_just_seen = 0; | |
319 | completely_empty = 0; | |
320 | } | |
321 | } | |
322 | if (completely_empty) | |
323 | return 0; | |
324 | if (!nl_just_seen) | |
325 | count++; /* no trailing newline */ | |
326 | return count; | |
327 | } | |
328 | ||
6957eb9a JH |
329 | static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) |
330 | { | |
331 | if (!DIFF_FILE_VALID(one)) { | |
332 | mf->ptr = (char *)""; /* does not matter */ | |
333 | mf->size = 0; | |
334 | return 0; | |
335 | } | |
336 | else if (diff_populate_filespec(one, 0)) | |
337 | return -1; | |
bb35fefb | 338 | |
6957eb9a JH |
339 | mf->ptr = one->data; |
340 | mf->size = one->size; | |
341 | return 0; | |
342 | } | |
343 | ||
abb371a1 JK |
344 | /* like fill_mmfile, but only for size, so we can avoid retrieving blob */ |
345 | static unsigned long diff_filespec_size(struct diff_filespec *one) | |
346 | { | |
347 | if (!DIFF_FILE_VALID(one)) | |
348 | return 0; | |
349 | diff_populate_filespec(one, 1); | |
350 | return one->size; | |
351 | } | |
352 | ||
6957eb9a JH |
353 | static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule) |
354 | { | |
355 | char *ptr = mf->ptr; | |
356 | long size = mf->size; | |
357 | int cnt = 0; | |
358 | ||
359 | if (!size) | |
360 | return cnt; | |
361 | ptr += size - 1; /* pointing at the very end */ | |
362 | if (*ptr != '\n') | |
363 | ; /* incomplete line */ | |
364 | else | |
365 | ptr--; /* skip the last LF */ | |
366 | while (mf->ptr < ptr) { | |
367 | char *prev_eol; | |
368 | for (prev_eol = ptr; mf->ptr <= prev_eol; prev_eol--) | |
369 | if (*prev_eol == '\n') | |
370 | break; | |
371 | if (!ws_blank_line(prev_eol + 1, ptr - prev_eol, ws_rule)) | |
372 | break; | |
373 | cnt++; | |
374 | ptr = prev_eol - 1; | |
375 | } | |
376 | return cnt; | |
377 | } | |
378 | ||
379 | static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2, | |
380 | struct emit_callback *ecbdata) | |
381 | { | |
382 | int l1, l2, at; | |
383 | unsigned ws_rule = ecbdata->ws_rule; | |
384 | l1 = count_trailing_blank(mf1, ws_rule); | |
385 | l2 = count_trailing_blank(mf2, ws_rule); | |
386 | if (l2 <= l1) { | |
387 | ecbdata->blank_at_eof_in_preimage = 0; | |
388 | ecbdata->blank_at_eof_in_postimage = 0; | |
389 | return; | |
390 | } | |
391 | at = count_lines(mf1->ptr, mf1->size); | |
392 | ecbdata->blank_at_eof_in_preimage = (at - l1) + 1; | |
393 | ||
394 | at = count_lines(mf2->ptr, mf2->size); | |
395 | ecbdata->blank_at_eof_in_postimage = (at - l2) + 1; | |
396 | } | |
397 | ||
a3c158d4 | 398 | static void emit_line_0(struct diff_options *o, const char *set, const char *reset, |
250f7993 | 399 | int first, const char *line, int len) |
6957eb9a JH |
400 | { |
401 | int has_trailing_newline, has_trailing_carriage_return; | |
250f7993 | 402 | int nofirst; |
a3c158d4 BY |
403 | FILE *file = o->file; |
404 | ||
405 | if (o->output_prefix) { | |
406 | struct strbuf *msg = NULL; | |
407 | msg = o->output_prefix(o, o->output_prefix_data); | |
408 | assert(msg); | |
409 | fwrite(msg->buf, msg->len, 1, file); | |
410 | } | |
6957eb9a | 411 | |
250f7993 JH |
412 | if (len == 0) { |
413 | has_trailing_newline = (first == '\n'); | |
414 | has_trailing_carriage_return = (!has_trailing_newline && | |
415 | (first == '\r')); | |
416 | nofirst = has_trailing_newline || has_trailing_carriage_return; | |
417 | } else { | |
418 | has_trailing_newline = (len > 0 && line[len-1] == '\n'); | |
419 | if (has_trailing_newline) | |
420 | len--; | |
421 | has_trailing_carriage_return = (len > 0 && line[len-1] == '\r'); | |
422 | if (has_trailing_carriage_return) | |
423 | len--; | |
424 | nofirst = 0; | |
425 | } | |
6957eb9a | 426 | |
06a47552 JH |
427 | if (len || !nofirst) { |
428 | fputs(set, file); | |
429 | if (!nofirst) | |
430 | fputc(first, file); | |
431 | fwrite(line, len, 1, file); | |
432 | fputs(reset, file); | |
433 | } | |
6957eb9a JH |
434 | if (has_trailing_carriage_return) |
435 | fputc('\r', file); | |
436 | if (has_trailing_newline) | |
437 | fputc('\n', file); | |
438 | } | |
439 | ||
a3c158d4 | 440 | static void emit_line(struct diff_options *o, const char *set, const char *reset, |
250f7993 JH |
441 | const char *line, int len) |
442 | { | |
a3c158d4 | 443 | emit_line_0(o, set, reset, line[0], line+1, len-1); |
250f7993 JH |
444 | } |
445 | ||
6957eb9a JH |
446 | static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len) |
447 | { | |
448 | if (!((ecbdata->ws_rule & WS_BLANK_AT_EOF) && | |
449 | ecbdata->blank_at_eof_in_preimage && | |
450 | ecbdata->blank_at_eof_in_postimage && | |
451 | ecbdata->blank_at_eof_in_preimage <= ecbdata->lno_in_preimage && | |
452 | ecbdata->blank_at_eof_in_postimage <= ecbdata->lno_in_postimage)) | |
453 | return 0; | |
018cff70 | 454 | return ws_blank_line(line, len, ecbdata->ws_rule); |
6957eb9a JH |
455 | } |
456 | ||
018cff70 JH |
457 | static void emit_add_line(const char *reset, |
458 | struct emit_callback *ecbdata, | |
459 | const char *line, int len) | |
6957eb9a JH |
460 | { |
461 | const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE); | |
462 | const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW); | |
463 | ||
464 | if (!*ws) | |
a3c158d4 | 465 | emit_line_0(ecbdata->opt, set, reset, '+', line, len); |
6957eb9a JH |
466 | else if (new_blank_line_at_eof(ecbdata, line, len)) |
467 | /* Blank line at EOF - paint '+' as well */ | |
a3c158d4 | 468 | emit_line_0(ecbdata->opt, ws, reset, '+', line, len); |
6957eb9a JH |
469 | else { |
470 | /* Emit just the prefix, then the rest. */ | |
a3c158d4 | 471 | emit_line_0(ecbdata->opt, set, reset, '+', "", 0); |
018cff70 | 472 | ws_check_emit(line, len, ecbdata->ws_rule, |
a3c158d4 | 473 | ecbdata->opt->file, set, reset, ws); |
6957eb9a JH |
474 | } |
475 | } | |
476 | ||
89cb73a1 BW |
477 | static void emit_hunk_header(struct emit_callback *ecbdata, |
478 | const char *line, int len) | |
479 | { | |
480 | const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); | |
481 | const char *frag = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO); | |
482 | const char *func = diff_get_color(ecbdata->color_diff, DIFF_FUNCINFO); | |
483 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); | |
484 | static const char atat[2] = { '@', '@' }; | |
485 | const char *cp, *ep; | |
2efcc977 BY |
486 | struct strbuf msgbuf = STRBUF_INIT; |
487 | int org_len = len; | |
488 | int i = 1; | |
89cb73a1 BW |
489 | |
490 | /* | |
491 | * As a hunk header must begin with "@@ -<old>, +<new> @@", | |
492 | * it always is at least 10 bytes long. | |
493 | */ | |
494 | if (len < 10 || | |
495 | memcmp(line, atat, 2) || | |
496 | !(ep = memmem(line + 2, len - 2, atat, 2))) { | |
a3c158d4 | 497 | emit_line(ecbdata->opt, plain, reset, line, len); |
89cb73a1 BW |
498 | return; |
499 | } | |
500 | ep += 2; /* skip over @@ */ | |
501 | ||
502 | /* The hunk header in fraginfo color */ | |
2efcc977 BY |
503 | strbuf_add(&msgbuf, frag, strlen(frag)); |
504 | strbuf_add(&msgbuf, line, ep - line); | |
505 | strbuf_add(&msgbuf, reset, strlen(reset)); | |
506 | ||
507 | /* | |
508 | * trailing "\r\n" | |
509 | */ | |
510 | for ( ; i < 3; i++) | |
511 | if (line[len - i] == '\r' || line[len - i] == '\n') | |
512 | len--; | |
89cb73a1 BW |
513 | |
514 | /* blank before the func header */ | |
515 | for (cp = ep; ep - line < len; ep++) | |
516 | if (*ep != ' ' && *ep != '\t') | |
517 | break; | |
2efcc977 BY |
518 | if (ep != cp) { |
519 | strbuf_add(&msgbuf, plain, strlen(plain)); | |
520 | strbuf_add(&msgbuf, cp, ep - cp); | |
521 | strbuf_add(&msgbuf, reset, strlen(reset)); | |
522 | } | |
523 | ||
524 | if (ep < line + len) { | |
525 | strbuf_add(&msgbuf, func, strlen(func)); | |
526 | strbuf_add(&msgbuf, ep, line + len - ep); | |
527 | strbuf_add(&msgbuf, reset, strlen(reset)); | |
528 | } | |
89cb73a1 | 529 | |
2efcc977 BY |
530 | strbuf_add(&msgbuf, line + len, org_len - len); |
531 | emit_line(ecbdata->opt, "", "", msgbuf.buf, msgbuf.len); | |
532 | strbuf_release(&msgbuf); | |
89cb73a1 BW |
533 | } |
534 | ||
479b0ae8 JK |
535 | static struct diff_tempfile *claim_diff_tempfile(void) { |
536 | int i; | |
537 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) | |
538 | if (!diff_temp[i].name) | |
539 | return diff_temp + i; | |
540 | die("BUG: diff is failing to clean up its tempfiles"); | |
541 | } | |
542 | ||
543 | static int remove_tempfile_installed; | |
544 | ||
545 | static void remove_tempfile(void) | |
546 | { | |
547 | int i; | |
a8344abe NR |
548 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) { |
549 | if (diff_temp[i].name == diff_temp[i].tmp_path) | |
691f1a28 | 550 | unlink_or_warn(diff_temp[i].name); |
a8344abe NR |
551 | diff_temp[i].name = NULL; |
552 | } | |
479b0ae8 JK |
553 | } |
554 | ||
555 | static void remove_tempfile_on_signal(int signo) | |
556 | { | |
557 | remove_tempfile(); | |
4a16d072 | 558 | sigchain_pop(signo); |
479b0ae8 JK |
559 | raise(signo); |
560 | } | |
561 | ||
c0c77734 | 562 | static void print_line_count(FILE *file, int count) |
6973dcae JH |
563 | { |
564 | switch (count) { | |
565 | case 0: | |
c0c77734 | 566 | fprintf(file, "0,0"); |
6973dcae JH |
567 | break; |
568 | case 1: | |
c0c77734 | 569 | fprintf(file, "1"); |
6973dcae JH |
570 | break; |
571 | default: | |
c0c77734 | 572 | fprintf(file, "1,%d", count); |
6973dcae JH |
573 | break; |
574 | } | |
575 | } | |
576 | ||
7f7ee2ff JH |
577 | static void emit_rewrite_lines(struct emit_callback *ecb, |
578 | int prefix, const char *data, int size) | |
6973dcae | 579 | { |
7f7ee2ff JH |
580 | const char *endp = NULL; |
581 | static const char *nneof = " No newline at end of file\n"; | |
582 | const char *old = diff_get_color(ecb->color_diff, DIFF_FILE_OLD); | |
583 | const char *reset = diff_get_color(ecb->color_diff, DIFF_RESET); | |
584 | ||
585 | while (0 < size) { | |
586 | int len; | |
587 | ||
588 | endp = memchr(data, '\n', size); | |
589 | len = endp ? (endp - data + 1) : size; | |
590 | if (prefix != '+') { | |
591 | ecb->lno_in_preimage++; | |
a3c158d4 | 592 | emit_line_0(ecb->opt, old, reset, '-', |
7f7ee2ff JH |
593 | data, len); |
594 | } else { | |
595 | ecb->lno_in_postimage++; | |
596 | emit_add_line(reset, ecb, data, len); | |
13e36ec5 | 597 | } |
7f7ee2ff JH |
598 | size -= len; |
599 | data += len; | |
600 | } | |
601 | if (!endp) { | |
602 | const char *plain = diff_get_color(ecb->color_diff, | |
603 | DIFF_PLAIN); | |
35e2d03c | 604 | putc('\n', ecb->opt->file); |
a3c158d4 | 605 | emit_line_0(ecb->opt, plain, reset, '\\', |
7f7ee2ff | 606 | nneof, strlen(nneof)); |
6973dcae | 607 | } |
6973dcae JH |
608 | } |
609 | ||
610 | static void emit_rewrite_diff(const char *name_a, | |
611 | const char *name_b, | |
612 | struct diff_filespec *one, | |
13e36ec5 | 613 | struct diff_filespec *two, |
d9bae1a1 JK |
614 | struct userdiff_driver *textconv_one, |
615 | struct userdiff_driver *textconv_two, | |
eab9a40b | 616 | struct diff_options *o) |
6973dcae JH |
617 | { |
618 | int lc_a, lc_b; | |
1a9eb3b9 | 619 | const char *name_a_tab, *name_b_tab; |
f1c96261 JK |
620 | const char *metainfo = diff_get_color(o->use_color, DIFF_METAINFO); |
621 | const char *fraginfo = diff_get_color(o->use_color, DIFF_FRAGINFO); | |
622 | const char *reset = diff_get_color(o->use_color, DIFF_RESET); | |
d5625091 | 623 | static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT; |
a5a818ee | 624 | const char *a_prefix, *b_prefix; |
840383b2 | 625 | char *data_one, *data_two; |
3aa1f7ca | 626 | size_t size_one, size_two; |
7f7ee2ff | 627 | struct emit_callback ecbdata; |
7be57610 BY |
628 | char *line_prefix = ""; |
629 | struct strbuf *msgbuf; | |
630 | ||
631 | if (o && o->output_prefix) { | |
632 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
633 | line_prefix = msgbuf->buf; | |
634 | } | |
a5a818ee JH |
635 | |
636 | if (diff_mnemonic_prefix && DIFF_OPT_TST(o, REVERSE_DIFF)) { | |
637 | a_prefix = o->b_prefix; | |
638 | b_prefix = o->a_prefix; | |
639 | } else { | |
640 | a_prefix = o->a_prefix; | |
641 | b_prefix = o->b_prefix; | |
642 | } | |
1a9eb3b9 | 643 | |
8a13becc JH |
644 | name_a += (*name_a == '/'); |
645 | name_b += (*name_b == '/'); | |
1a9eb3b9 JH |
646 | name_a_tab = strchr(name_a, ' ') ? "\t" : ""; |
647 | name_b_tab = strchr(name_b, ' ') ? "\t" : ""; | |
648 | ||
d5625091 JH |
649 | strbuf_reset(&a_name); |
650 | strbuf_reset(&b_name); | |
a5a818ee JH |
651 | quote_two_c_style(&a_name, a_prefix, name_a, 0); |
652 | quote_two_c_style(&b_name, b_prefix, name_b, 0); | |
d5625091 | 653 | |
840383b2 JK |
654 | size_one = fill_textconv(textconv_one, one, &data_one); |
655 | size_two = fill_textconv(textconv_two, two, &data_two); | |
3aa1f7ca | 656 | |
d91ba8fa | 657 | memset(&ecbdata, 0, sizeof(ecbdata)); |
daa0c3d9 | 658 | ecbdata.color_diff = want_color(o->use_color); |
d91ba8fa JH |
659 | ecbdata.found_changesp = &o->found_changes; |
660 | ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a); | |
a3c158d4 | 661 | ecbdata.opt = o; |
d91ba8fa JH |
662 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) { |
663 | mmfile_t mf1, mf2; | |
664 | mf1.ptr = (char *)data_one; | |
665 | mf2.ptr = (char *)data_two; | |
666 | mf1.size = size_one; | |
667 | mf2.size = size_two; | |
668 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
669 | } | |
670 | ecbdata.lno_in_preimage = 1; | |
671 | ecbdata.lno_in_postimage = 1; | |
672 | ||
3aa1f7ca JK |
673 | lc_a = count_lines(data_one, size_one); |
674 | lc_b = count_lines(data_two, size_two); | |
c0c77734 | 675 | fprintf(o->file, |
7be57610 BY |
676 | "%s%s--- %s%s%s\n%s%s+++ %s%s%s\n%s%s@@ -", |
677 | line_prefix, metainfo, a_name.buf, name_a_tab, reset, | |
678 | line_prefix, metainfo, b_name.buf, name_b_tab, reset, | |
679 | line_prefix, fraginfo); | |
467ddc14 JH |
680 | if (!o->irreversible_delete) |
681 | print_line_count(o->file, lc_a); | |
682 | else | |
683 | fprintf(o->file, "?,?"); | |
c0c77734 DB |
684 | fprintf(o->file, " +"); |
685 | print_line_count(o->file, lc_b); | |
686 | fprintf(o->file, " @@%s\n", reset); | |
467ddc14 | 687 | if (lc_a && !o->irreversible_delete) |
d91ba8fa | 688 | emit_rewrite_lines(&ecbdata, '-', data_one, size_one); |
6973dcae | 689 | if (lc_b) |
d91ba8fa | 690 | emit_rewrite_lines(&ecbdata, '+', data_two, size_two); |
b76c056b | 691 | if (textconv_one) |
aed6ca52 | 692 | free((char *)data_one); |
b76c056b | 693 | if (textconv_two) |
aed6ca52 | 694 | free((char *)data_two); |
6973dcae JH |
695 | } |
696 | ||
f59a59e2 JS |
697 | struct diff_words_buffer { |
698 | mmfile_t text; | |
699 | long alloc; | |
2e5d2003 JS |
700 | struct diff_words_orig { |
701 | const char *begin, *end; | |
702 | } *orig; | |
703 | int orig_nr, orig_alloc; | |
f59a59e2 JS |
704 | }; |
705 | ||
706 | static void diff_words_append(char *line, unsigned long len, | |
707 | struct diff_words_buffer *buffer) | |
708 | { | |
23c1575f | 709 | ALLOC_GROW(buffer->text.ptr, buffer->text.size + len, buffer->alloc); |
f59a59e2 JS |
710 | line++; |
711 | len--; | |
712 | memcpy(buffer->text.ptr + buffer->text.size, line, len); | |
713 | buffer->text.size += len; | |
2b6a5417 | 714 | buffer->text.ptr[buffer->text.size] = '\0'; |
f59a59e2 JS |
715 | } |
716 | ||
9cba13ca | 717 | struct diff_words_style_elem { |
882749a0 TR |
718 | const char *prefix; |
719 | const char *suffix; | |
720 | const char *color; /* NULL; filled in by the setup code if | |
721 | * color is enabled */ | |
722 | }; | |
723 | ||
9cba13ca | 724 | struct diff_words_style { |
882749a0 TR |
725 | enum diff_words_type type; |
726 | struct diff_words_style_elem new, old, ctx; | |
727 | const char *newline; | |
728 | }; | |
729 | ||
c2e86add | 730 | static struct diff_words_style diff_words_styles[] = { |
882749a0 TR |
731 | { DIFF_WORDS_PORCELAIN, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" }, |
732 | { DIFF_WORDS_PLAIN, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" }, | |
733 | { DIFF_WORDS_COLOR, {"", ""}, {"", ""}, {"", ""}, "\n" } | |
734 | }; | |
735 | ||
f59a59e2 | 736 | struct diff_words_data { |
f59a59e2 | 737 | struct diff_words_buffer minus, plus; |
2e5d2003 | 738 | const char *current_plus; |
4297c0ae BY |
739 | int last_minus; |
740 | struct diff_options *opt; | |
2b6a5417 | 741 | regex_t *word_regex; |
882749a0 TR |
742 | enum diff_words_type type; |
743 | struct diff_words_style *style; | |
f59a59e2 JS |
744 | }; |
745 | ||
882749a0 TR |
746 | static int fn_out_diff_words_write_helper(FILE *fp, |
747 | struct diff_words_style_elem *st_el, | |
748 | const char *newline, | |
4297c0ae BY |
749 | size_t count, const char *buf, |
750 | const char *line_prefix) | |
882749a0 | 751 | { |
4297c0ae BY |
752 | int print = 0; |
753 | ||
882749a0 TR |
754 | while (count) { |
755 | char *p = memchr(buf, '\n', count); | |
4297c0ae BY |
756 | if (print) |
757 | fputs(line_prefix, fp); | |
882749a0 TR |
758 | if (p != buf) { |
759 | if (st_el->color && fputs(st_el->color, fp) < 0) | |
760 | return -1; | |
761 | if (fputs(st_el->prefix, fp) < 0 || | |
762 | fwrite(buf, p ? p - buf : count, 1, fp) != 1 || | |
763 | fputs(st_el->suffix, fp) < 0) | |
764 | return -1; | |
765 | if (st_el->color && *st_el->color | |
766 | && fputs(GIT_COLOR_RESET, fp) < 0) | |
767 | return -1; | |
768 | } | |
769 | if (!p) | |
770 | return 0; | |
771 | if (fputs(newline, fp) < 0) | |
772 | return -1; | |
773 | count -= p + 1 - buf; | |
774 | buf = p + 1; | |
4297c0ae | 775 | print = 1; |
882749a0 TR |
776 | } |
777 | return 0; | |
778 | } | |
779 | ||
4297c0ae BY |
780 | /* |
781 | * '--color-words' algorithm can be described as: | |
782 | * | |
783 | * 1. collect a the minus/plus lines of a diff hunk, divided into | |
784 | * minus-lines and plus-lines; | |
785 | * | |
786 | * 2. break both minus-lines and plus-lines into words and | |
787 | * place them into two mmfile_t with one word for each line; | |
788 | * | |
789 | * 3. use xdiff to run diff on the two mmfile_t to get the words level diff; | |
790 | * | |
791 | * And for the common parts of the both file, we output the plus side text. | |
792 | * diff_words->current_plus is used to trace the current position of the plus file | |
793 | * which printed. diff_words->last_minus is used to trace the last minus word | |
794 | * printed. | |
795 | * | |
796 | * For '--graph' to work with '--color-words', we need to output the graph prefix | |
797 | * on each line of color words output. Generally, there are two conditions on | |
798 | * which we should output the prefix. | |
799 | * | |
800 | * 1. diff_words->last_minus == 0 && | |
801 | * diff_words->current_plus == diff_words->plus.text.ptr | |
802 | * | |
803 | * that is: the plus text must start as a new line, and if there is no minus | |
804 | * word printed, a graph prefix must be printed. | |
805 | * | |
806 | * 2. diff_words->current_plus > diff_words->plus.text.ptr && | |
807 | * *(diff_words->current_plus - 1) == '\n' | |
808 | * | |
809 | * that is: a graph prefix must be printed following a '\n' | |
810 | */ | |
811 | static int color_words_output_graph_prefix(struct diff_words_data *diff_words) | |
812 | { | |
813 | if ((diff_words->last_minus == 0 && | |
814 | diff_words->current_plus == diff_words->plus.text.ptr) || | |
815 | (diff_words->current_plus > diff_words->plus.text.ptr && | |
816 | *(diff_words->current_plus - 1) == '\n')) { | |
817 | return 1; | |
818 | } else { | |
819 | return 0; | |
820 | } | |
821 | } | |
822 | ||
f59a59e2 | 823 | static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) |
f59a59e2 | 824 | { |
f59a59e2 | 825 | struct diff_words_data *diff_words = priv; |
882749a0 | 826 | struct diff_words_style *style = diff_words->style; |
2e5d2003 JS |
827 | int minus_first, minus_len, plus_first, plus_len; |
828 | const char *minus_begin, *minus_end, *plus_begin, *plus_end; | |
4297c0ae BY |
829 | struct diff_options *opt = diff_words->opt; |
830 | struct strbuf *msgbuf; | |
831 | char *line_prefix = ""; | |
f59a59e2 | 832 | |
2e5d2003 JS |
833 | if (line[0] != '@' || parse_hunk_header(line, len, |
834 | &minus_first, &minus_len, &plus_first, &plus_len)) | |
f59a59e2 JS |
835 | return; |
836 | ||
4297c0ae BY |
837 | assert(opt); |
838 | if (opt->output_prefix) { | |
839 | msgbuf = opt->output_prefix(opt, opt->output_prefix_data); | |
840 | line_prefix = msgbuf->buf; | |
841 | } | |
842 | ||
2e5d2003 JS |
843 | /* POSIX requires that first be decremented by one if len == 0... */ |
844 | if (minus_len) { | |
845 | minus_begin = diff_words->minus.orig[minus_first].begin; | |
846 | minus_end = | |
847 | diff_words->minus.orig[minus_first + minus_len - 1].end; | |
848 | } else | |
849 | minus_begin = minus_end = | |
850 | diff_words->minus.orig[minus_first].end; | |
851 | ||
852 | if (plus_len) { | |
853 | plus_begin = diff_words->plus.orig[plus_first].begin; | |
854 | plus_end = diff_words->plus.orig[plus_first + plus_len - 1].end; | |
855 | } else | |
856 | plus_begin = plus_end = diff_words->plus.orig[plus_first].end; | |
857 | ||
4297c0ae BY |
858 | if (color_words_output_graph_prefix(diff_words)) { |
859 | fputs(line_prefix, diff_words->opt->file); | |
860 | } | |
861 | if (diff_words->current_plus != plus_begin) { | |
862 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 TR |
863 | &style->ctx, style->newline, |
864 | plus_begin - diff_words->current_plus, | |
4297c0ae BY |
865 | diff_words->current_plus, line_prefix); |
866 | if (*(plus_begin - 1) == '\n') | |
867 | fputs(line_prefix, diff_words->opt->file); | |
868 | } | |
869 | if (minus_begin != minus_end) { | |
870 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 871 | &style->old, style->newline, |
4297c0ae BY |
872 | minus_end - minus_begin, minus_begin, |
873 | line_prefix); | |
874 | } | |
875 | if (plus_begin != plus_end) { | |
876 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 877 | &style->new, style->newline, |
4297c0ae BY |
878 | plus_end - plus_begin, plus_begin, |
879 | line_prefix); | |
880 | } | |
2e5d2003 JS |
881 | |
882 | diff_words->current_plus = plus_end; | |
4297c0ae | 883 | diff_words->last_minus = minus_first; |
f59a59e2 JS |
884 | } |
885 | ||
2b6a5417 JS |
886 | /* This function starts looking at *begin, and returns 0 iff a word was found. */ |
887 | static int find_word_boundaries(mmfile_t *buffer, regex_t *word_regex, | |
888 | int *begin, int *end) | |
889 | { | |
890 | if (word_regex && *begin < buffer->size) { | |
891 | regmatch_t match[1]; | |
892 | if (!regexec(word_regex, buffer->ptr + *begin, 1, match, 0)) { | |
893 | char *p = memchr(buffer->ptr + *begin + match[0].rm_so, | |
894 | '\n', match[0].rm_eo - match[0].rm_so); | |
895 | *end = p ? p - buffer->ptr : match[0].rm_eo + *begin; | |
896 | *begin += match[0].rm_so; | |
897 | return *begin >= *end; | |
898 | } | |
899 | return -1; | |
f59a59e2 JS |
900 | } |
901 | ||
2b6a5417 JS |
902 | /* find the next word */ |
903 | while (*begin < buffer->size && isspace(buffer->ptr[*begin])) | |
904 | (*begin)++; | |
905 | if (*begin >= buffer->size) | |
906 | return -1; | |
f59a59e2 | 907 | |
2b6a5417 JS |
908 | /* find the end of the word */ |
909 | *end = *begin + 1; | |
910 | while (*end < buffer->size && !isspace(buffer->ptr[*end])) | |
911 | (*end)++; | |
912 | ||
913 | return 0; | |
f59a59e2 JS |
914 | } |
915 | ||
23c1575f | 916 | /* |
2e5d2003 JS |
917 | * This function splits the words in buffer->text, stores the list with |
918 | * newline separator into out, and saves the offsets of the original words | |
919 | * in buffer->orig. | |
23c1575f | 920 | */ |
2b6a5417 JS |
921 | static void diff_words_fill(struct diff_words_buffer *buffer, mmfile_t *out, |
922 | regex_t *word_regex) | |
f59a59e2 | 923 | { |
2e5d2003 | 924 | int i, j; |
2b6a5417 | 925 | long alloc = 0; |
f59a59e2 | 926 | |
2e5d2003 | 927 | out->size = 0; |
2b6a5417 | 928 | out->ptr = NULL; |
f59a59e2 | 929 | |
2e5d2003 JS |
930 | /* fake an empty "0th" word */ |
931 | ALLOC_GROW(buffer->orig, 1, buffer->orig_alloc); | |
932 | buffer->orig[0].begin = buffer->orig[0].end = buffer->text.ptr; | |
933 | buffer->orig_nr = 1; | |
934 | ||
935 | for (i = 0; i < buffer->text.size; i++) { | |
2b6a5417 JS |
936 | if (find_word_boundaries(&buffer->text, word_regex, &i, &j)) |
937 | return; | |
2e5d2003 JS |
938 | |
939 | /* store original boundaries */ | |
940 | ALLOC_GROW(buffer->orig, buffer->orig_nr + 1, | |
941 | buffer->orig_alloc); | |
942 | buffer->orig[buffer->orig_nr].begin = buffer->text.ptr + i; | |
943 | buffer->orig[buffer->orig_nr].end = buffer->text.ptr + j; | |
944 | buffer->orig_nr++; | |
945 | ||
946 | /* store one word */ | |
2b6a5417 | 947 | ALLOC_GROW(out->ptr, out->size + j - i + 1, alloc); |
2e5d2003 JS |
948 | memcpy(out->ptr + out->size, buffer->text.ptr + i, j - i); |
949 | out->ptr[out->size + j - i] = '\n'; | |
950 | out->size += j - i + 1; | |
951 | ||
952 | i = j - 1; | |
f59a59e2 JS |
953 | } |
954 | } | |
955 | ||
956 | /* this executes the word diff on the accumulated buffers */ | |
957 | static void diff_words_show(struct diff_words_data *diff_words) | |
958 | { | |
959 | xpparam_t xpp; | |
960 | xdemitconf_t xecfg; | |
f59a59e2 | 961 | mmfile_t minus, plus; |
882749a0 | 962 | struct diff_words_style *style = diff_words->style; |
f59a59e2 | 963 | |
4297c0ae BY |
964 | struct diff_options *opt = diff_words->opt; |
965 | struct strbuf *msgbuf; | |
966 | char *line_prefix = ""; | |
967 | ||
968 | assert(opt); | |
969 | if (opt->output_prefix) { | |
970 | msgbuf = opt->output_prefix(opt, opt->output_prefix_data); | |
971 | line_prefix = msgbuf->buf; | |
972 | } | |
973 | ||
2e5d2003 JS |
974 | /* special case: only removal */ |
975 | if (!diff_words->plus.text.size) { | |
4297c0ae BY |
976 | fputs(line_prefix, diff_words->opt->file); |
977 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 978 | &style->old, style->newline, |
4297c0ae BY |
979 | diff_words->minus.text.size, |
980 | diff_words->minus.text.ptr, line_prefix); | |
2e5d2003 JS |
981 | diff_words->minus.text.size = 0; |
982 | return; | |
983 | } | |
984 | ||
985 | diff_words->current_plus = diff_words->plus.text.ptr; | |
4297c0ae | 986 | diff_words->last_minus = 0; |
f59a59e2 | 987 | |
9ccd0a88 | 988 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 989 | memset(&xecfg, 0, sizeof(xecfg)); |
2b6a5417 JS |
990 | diff_words_fill(&diff_words->minus, &minus, diff_words->word_regex); |
991 | diff_words_fill(&diff_words->plus, &plus, diff_words->word_regex); | |
582aa00b | 992 | xpp.flags = 0; |
2b6a5417 | 993 | /* as only the hunk header will be parsed, we need a 0-context */ |
2e5d2003 | 994 | xecfg.ctxlen = 0; |
8a3f524b | 995 | xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words, |
dfea7900 | 996 | &xpp, &xecfg); |
f59a59e2 JS |
997 | free(minus.ptr); |
998 | free(plus.ptr); | |
2e5d2003 | 999 | if (diff_words->current_plus != diff_words->plus.text.ptr + |
4297c0ae BY |
1000 | diff_words->plus.text.size) { |
1001 | if (color_words_output_graph_prefix(diff_words)) | |
1002 | fputs(line_prefix, diff_words->opt->file); | |
1003 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 1004 | &style->ctx, style->newline, |
2e5d2003 | 1005 | diff_words->plus.text.ptr + diff_words->plus.text.size |
4297c0ae BY |
1006 | - diff_words->current_plus, diff_words->current_plus, |
1007 | line_prefix); | |
1008 | } | |
f59a59e2 | 1009 | diff_words->minus.text.size = diff_words->plus.text.size = 0; |
f59a59e2 JS |
1010 | } |
1011 | ||
76fd2828 JH |
1012 | /* In "color-words" mode, show word-diff of words accumulated in the buffer */ |
1013 | static void diff_words_flush(struct emit_callback *ecbdata) | |
1014 | { | |
1015 | if (ecbdata->diff_words->minus.text.size || | |
1016 | ecbdata->diff_words->plus.text.size) | |
1017 | diff_words_show(ecbdata->diff_words); | |
1018 | } | |
1019 | ||
77d1a520 TR |
1020 | static void diff_filespec_load_driver(struct diff_filespec *one) |
1021 | { | |
1022 | /* Use already-loaded driver */ | |
1023 | if (one->driver) | |
1024 | return; | |
1025 | ||
1026 | if (S_ISREG(one->mode)) | |
1027 | one->driver = userdiff_find_by_path(one->path); | |
1028 | ||
1029 | /* Fallback to default settings */ | |
1030 | if (!one->driver) | |
1031 | one->driver = userdiff_find_by_name("default"); | |
1032 | } | |
1033 | ||
1034 | static const char *userdiff_word_regex(struct diff_filespec *one) | |
1035 | { | |
1036 | diff_filespec_load_driver(one); | |
1037 | return one->driver->word_regex; | |
1038 | } | |
1039 | ||
1040 | static void init_diff_words_data(struct emit_callback *ecbdata, | |
6440d341 | 1041 | struct diff_options *orig_opts, |
77d1a520 TR |
1042 | struct diff_filespec *one, |
1043 | struct diff_filespec *two) | |
1044 | { | |
1045 | int i; | |
6440d341 TR |
1046 | struct diff_options *o = xmalloc(sizeof(struct diff_options)); |
1047 | memcpy(o, orig_opts, sizeof(struct diff_options)); | |
77d1a520 TR |
1048 | |
1049 | ecbdata->diff_words = | |
1050 | xcalloc(1, sizeof(struct diff_words_data)); | |
1051 | ecbdata->diff_words->type = o->word_diff; | |
1052 | ecbdata->diff_words->opt = o; | |
1053 | if (!o->word_regex) | |
1054 | o->word_regex = userdiff_word_regex(one); | |
1055 | if (!o->word_regex) | |
1056 | o->word_regex = userdiff_word_regex(two); | |
1057 | if (!o->word_regex) | |
1058 | o->word_regex = diff_word_regex_cfg; | |
1059 | if (o->word_regex) { | |
1060 | ecbdata->diff_words->word_regex = (regex_t *) | |
1061 | xmalloc(sizeof(regex_t)); | |
1062 | if (regcomp(ecbdata->diff_words->word_regex, | |
1063 | o->word_regex, | |
1064 | REG_EXTENDED | REG_NEWLINE)) | |
1065 | die ("Invalid regular expression: %s", | |
1066 | o->word_regex); | |
1067 | } | |
1068 | for (i = 0; i < ARRAY_SIZE(diff_words_styles); i++) { | |
1069 | if (o->word_diff == diff_words_styles[i].type) { | |
1070 | ecbdata->diff_words->style = | |
1071 | &diff_words_styles[i]; | |
1072 | break; | |
1073 | } | |
1074 | } | |
1075 | if (want_color(o->use_color)) { | |
1076 | struct diff_words_style *st = ecbdata->diff_words->style; | |
1077 | st->old.color = diff_get_color_opt(o, DIFF_FILE_OLD); | |
1078 | st->new.color = diff_get_color_opt(o, DIFF_FILE_NEW); | |
1079 | st->ctx.color = diff_get_color_opt(o, DIFF_PLAIN); | |
1080 | } | |
1081 | } | |
1082 | ||
f59a59e2 JS |
1083 | static void free_diff_words_data(struct emit_callback *ecbdata) |
1084 | { | |
1085 | if (ecbdata->diff_words) { | |
76fd2828 | 1086 | diff_words_flush(ecbdata); |
6440d341 | 1087 | free (ecbdata->diff_words->opt); |
8e0f7003 | 1088 | free (ecbdata->diff_words->minus.text.ptr); |
2e5d2003 | 1089 | free (ecbdata->diff_words->minus.orig); |
8e0f7003 | 1090 | free (ecbdata->diff_words->plus.text.ptr); |
2e5d2003 | 1091 | free (ecbdata->diff_words->plus.orig); |
ef5644ea BC |
1092 | if (ecbdata->diff_words->word_regex) { |
1093 | regfree(ecbdata->diff_words->word_regex); | |
1094 | free(ecbdata->diff_words->word_regex); | |
1095 | } | |
f59a59e2 JS |
1096 | free(ecbdata->diff_words); |
1097 | ecbdata->diff_words = NULL; | |
1098 | } | |
1099 | } | |
1100 | ||
ce436973 | 1101 | const char *diff_get_color(int diff_use_color, enum color_diff ix) |
cd112cef | 1102 | { |
daa0c3d9 | 1103 | if (want_color(diff_use_color)) |
50f575fc LT |
1104 | return diff_colors[ix]; |
1105 | return ""; | |
cd112cef JS |
1106 | } |
1107 | ||
23707811 JH |
1108 | static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len) |
1109 | { | |
1110 | const char *cp; | |
1111 | unsigned long allot; | |
1112 | size_t l = len; | |
1113 | ||
1114 | if (ecb->truncate) | |
1115 | return ecb->truncate(line, len); | |
1116 | cp = line; | |
1117 | allot = l; | |
1118 | while (0 < l) { | |
1119 | (void) utf8_width(&cp, &l); | |
1120 | if (!cp) | |
1121 | break; /* truncated in the middle? */ | |
1122 | } | |
1123 | return allot - l; | |
1124 | } | |
1125 | ||
d68fe26f | 1126 | static void find_lno(const char *line, struct emit_callback *ecbdata) |
690ed843 | 1127 | { |
d68fe26f JH |
1128 | const char *p; |
1129 | ecbdata->lno_in_preimage = 0; | |
1130 | ecbdata->lno_in_postimage = 0; | |
1131 | p = strchr(line, '-'); | |
690ed843 | 1132 | if (!p) |
d68fe26f JH |
1133 | return; /* cannot happen */ |
1134 | ecbdata->lno_in_preimage = strtol(p + 1, NULL, 10); | |
1135 | p = strchr(p, '+'); | |
1136 | if (!p) | |
1137 | return; /* cannot happen */ | |
1138 | ecbdata->lno_in_postimage = strtol(p + 1, NULL, 10); | |
690ed843 JH |
1139 | } |
1140 | ||
cd112cef | 1141 | static void fn_out_consume(void *priv, char *line, unsigned long len) |
6973dcae | 1142 | { |
6973dcae | 1143 | struct emit_callback *ecbdata = priv; |
472ca780 JK |
1144 | const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO); |
1145 | const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); | |
ce436973 | 1146 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); |
7be57610 BY |
1147 | struct diff_options *o = ecbdata->opt; |
1148 | char *line_prefix = ""; | |
1149 | struct strbuf *msgbuf; | |
1150 | ||
1151 | if (o && o->output_prefix) { | |
1152 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
1153 | line_prefix = msgbuf->buf; | |
1154 | } | |
6973dcae | 1155 | |
3e97c7c6 | 1156 | if (ecbdata->header) { |
a3c158d4 | 1157 | fprintf(ecbdata->opt->file, "%s", ecbdata->header->buf); |
3e97c7c6 GB |
1158 | strbuf_reset(ecbdata->header); |
1159 | ecbdata->header = NULL; | |
1160 | } | |
34a5e1a2 JS |
1161 | *(ecbdata->found_changesp) = 1; |
1162 | ||
6973dcae | 1163 | if (ecbdata->label_path[0]) { |
1a9eb3b9 JH |
1164 | const char *name_a_tab, *name_b_tab; |
1165 | ||
1166 | name_a_tab = strchr(ecbdata->label_path[0], ' ') ? "\t" : ""; | |
1167 | name_b_tab = strchr(ecbdata->label_path[1], ' ') ? "\t" : ""; | |
1168 | ||
7be57610 BY |
1169 | fprintf(ecbdata->opt->file, "%s%s--- %s%s%s\n", |
1170 | line_prefix, meta, ecbdata->label_path[0], reset, name_a_tab); | |
1171 | fprintf(ecbdata->opt->file, "%s%s+++ %s%s%s\n", | |
1172 | line_prefix, meta, ecbdata->label_path[1], reset, name_b_tab); | |
6973dcae JH |
1173 | ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; |
1174 | } | |
cd112cef | 1175 | |
a624eaa7 JM |
1176 | if (diff_suppress_blank_empty |
1177 | && len == 2 && line[0] == ' ' && line[1] == '\n') { | |
1178 | line[0] = '\n'; | |
1179 | len = 1; | |
1180 | } | |
1181 | ||
b8d9c1a6 | 1182 | if (line[0] == '@') { |
76fd2828 JH |
1183 | if (ecbdata->diff_words) |
1184 | diff_words_flush(ecbdata); | |
23707811 | 1185 | len = sane_truncate_line(ecbdata, line, len); |
d68fe26f | 1186 | find_lno(line, ecbdata); |
89cb73a1 | 1187 | emit_hunk_header(ecbdata, line, len); |
23707811 | 1188 | if (line[len-1] != '\n') |
a3c158d4 | 1189 | putc('\n', ecbdata->opt->file); |
448c3ef1 | 1190 | return; |
cd112cef | 1191 | } |
448c3ef1 | 1192 | |
b8d9c1a6 | 1193 | if (len < 1) { |
a3c158d4 | 1194 | emit_line(ecbdata->opt, reset, reset, line, len); |
882749a0 TR |
1195 | if (ecbdata->diff_words |
1196 | && ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) | |
a3c158d4 | 1197 | fputs("~\n", ecbdata->opt->file); |
448c3ef1 | 1198 | return; |
cd112cef | 1199 | } |
448c3ef1 | 1200 | |
448c3ef1 JH |
1201 | if (ecbdata->diff_words) { |
1202 | if (line[0] == '-') { | |
1203 | diff_words_append(line, len, | |
1204 | &ecbdata->diff_words->minus); | |
1205 | return; | |
1206 | } else if (line[0] == '+') { | |
1207 | diff_words_append(line, len, | |
1208 | &ecbdata->diff_words->plus); | |
1209 | return; | |
c7c2bc0a TR |
1210 | } else if (!prefixcmp(line, "\\ ")) { |
1211 | /* | |
1212 | * Eat the "no newline at eof" marker as if we | |
1213 | * saw a "+" or "-" line with nothing on it, | |
1214 | * and return without diff_words_flush() to | |
1215 | * defer processing. If this is the end of | |
1216 | * preimage, more "+" lines may come after it. | |
1217 | */ | |
1218 | return; | |
448c3ef1 | 1219 | } |
76fd2828 | 1220 | diff_words_flush(ecbdata); |
882749a0 | 1221 | if (ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) { |
a3c158d4 BY |
1222 | emit_line(ecbdata->opt, plain, reset, line, len); |
1223 | fputs("~\n", ecbdata->opt->file); | |
882749a0 | 1224 | } else { |
42536dd9 JM |
1225 | /* |
1226 | * Skip the prefix character, if any. With | |
1227 | * diff_suppress_blank_empty, there may be | |
1228 | * none. | |
1229 | */ | |
1230 | if (line[0] != '\n') { | |
1231 | line++; | |
1232 | len--; | |
1233 | } | |
1234 | emit_line(ecbdata->opt, plain, reset, line, len); | |
882749a0 | 1235 | } |
448c3ef1 JH |
1236 | return; |
1237 | } | |
448c3ef1 | 1238 | |
690ed843 JH |
1239 | if (line[0] != '+') { |
1240 | const char *color = | |
1241 | diff_get_color(ecbdata->color_diff, | |
1242 | line[0] == '-' ? DIFF_FILE_OLD : DIFF_PLAIN); | |
1243 | ecbdata->lno_in_preimage++; | |
d68fe26f JH |
1244 | if (line[0] == ' ') |
1245 | ecbdata->lno_in_postimage++; | |
a3c158d4 | 1246 | emit_line(ecbdata->opt, color, reset, line, len); |
d68fe26f JH |
1247 | } else { |
1248 | ecbdata->lno_in_postimage++; | |
018cff70 | 1249 | emit_add_line(reset, ecbdata, line + 1, len - 1); |
448c3ef1 | 1250 | } |
6973dcae JH |
1251 | } |
1252 | ||
1253 | static char *pprint_rename(const char *a, const char *b) | |
1254 | { | |
1255 | const char *old = a; | |
1256 | const char *new = b; | |
f285a2d7 | 1257 | struct strbuf name = STRBUF_INIT; |
6973dcae | 1258 | int pfx_length, sfx_length; |
dd281f09 | 1259 | int pfx_adjust_for_slash; |
6973dcae JH |
1260 | int len_a = strlen(a); |
1261 | int len_b = strlen(b); | |
663af342 | 1262 | int a_midlen, b_midlen; |
e5bfbf9b AJ |
1263 | int qlen_a = quote_c_style(a, NULL, NULL, 0); |
1264 | int qlen_b = quote_c_style(b, NULL, NULL, 0); | |
1265 | ||
1266 | if (qlen_a || qlen_b) { | |
663af342 PH |
1267 | quote_c_style(a, &name, NULL, 0); |
1268 | strbuf_addstr(&name, " => "); | |
1269 | quote_c_style(b, &name, NULL, 0); | |
b315c5c0 | 1270 | return strbuf_detach(&name, NULL); |
e5bfbf9b | 1271 | } |
6973dcae JH |
1272 | |
1273 | /* Find common prefix */ | |
1274 | pfx_length = 0; | |
1275 | while (*old && *new && *old == *new) { | |
1276 | if (*old == '/') | |
1277 | pfx_length = old - a + 1; | |
1278 | old++; | |
1279 | new++; | |
1280 | } | |
1281 | ||
1282 | /* Find common suffix */ | |
1283 | old = a + len_a; | |
1284 | new = b + len_b; | |
1285 | sfx_length = 0; | |
d020e27f | 1286 | /* |
dd281f09 TR |
1287 | * If there is a common prefix, it must end in a slash. In |
1288 | * that case we let this loop run 1 into the prefix to see the | |
1289 | * same slash. | |
1290 | * | |
1291 | * If there is no common prefix, we cannot do this as it would | |
1292 | * underrun the input strings. | |
d020e27f | 1293 | */ |
dd281f09 TR |
1294 | pfx_adjust_for_slash = (pfx_length ? 1 : 0); |
1295 | while (a + pfx_length - pfx_adjust_for_slash <= old && | |
1296 | b + pfx_length - pfx_adjust_for_slash <= new && | |
d020e27f | 1297 | *old == *new) { |
6973dcae JH |
1298 | if (*old == '/') |
1299 | sfx_length = len_a - (old - a); | |
1300 | old--; | |
1301 | new--; | |
1302 | } | |
1303 | ||
1304 | /* | |
1305 | * pfx{mid-a => mid-b}sfx | |
1306 | * {pfx-a => pfx-b}sfx | |
1307 | * pfx{sfx-a => sfx-b} | |
1308 | * name-a => name-b | |
1309 | */ | |
663af342 PH |
1310 | a_midlen = len_a - pfx_length - sfx_length; |
1311 | b_midlen = len_b - pfx_length - sfx_length; | |
1312 | if (a_midlen < 0) | |
1313 | a_midlen = 0; | |
1314 | if (b_midlen < 0) | |
1315 | b_midlen = 0; | |
1316 | ||
1317 | strbuf_grow(&name, pfx_length + a_midlen + b_midlen + sfx_length + 7); | |
6973dcae | 1318 | if (pfx_length + sfx_length) { |
663af342 PH |
1319 | strbuf_add(&name, a, pfx_length); |
1320 | strbuf_addch(&name, '{'); | |
6973dcae | 1321 | } |
663af342 PH |
1322 | strbuf_add(&name, a + pfx_length, a_midlen); |
1323 | strbuf_addstr(&name, " => "); | |
1324 | strbuf_add(&name, b + pfx_length, b_midlen); | |
1325 | if (pfx_length + sfx_length) { | |
1326 | strbuf_addch(&name, '}'); | |
1327 | strbuf_add(&name, a + len_a - sfx_length, sfx_length); | |
6973dcae | 1328 | } |
b315c5c0 | 1329 | return strbuf_detach(&name, NULL); |
6973dcae JH |
1330 | } |
1331 | ||
1332 | struct diffstat_t { | |
6973dcae JH |
1333 | int nr; |
1334 | int alloc; | |
1335 | struct diffstat_file { | |
f604652e | 1336 | char *from_name; |
6973dcae | 1337 | char *name; |
f604652e | 1338 | char *print_name; |
6973dcae JH |
1339 | unsigned is_unmerged:1; |
1340 | unsigned is_binary:1; | |
1341 | unsigned is_renamed:1; | |
74faaa16 | 1342 | unsigned is_interesting:1; |
0974c117 | 1343 | uintmax_t added, deleted; |
6973dcae JH |
1344 | } **files; |
1345 | }; | |
1346 | ||
1347 | static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat, | |
1348 | const char *name_a, | |
1349 | const char *name_b) | |
1350 | { | |
1351 | struct diffstat_file *x; | |
1352 | x = xcalloc(sizeof (*x), 1); | |
1353 | if (diffstat->nr == diffstat->alloc) { | |
1354 | diffstat->alloc = alloc_nr(diffstat->alloc); | |
1355 | diffstat->files = xrealloc(diffstat->files, | |
1356 | diffstat->alloc * sizeof(x)); | |
1357 | } | |
1358 | diffstat->files[diffstat->nr++] = x; | |
1359 | if (name_b) { | |
f604652e JH |
1360 | x->from_name = xstrdup(name_a); |
1361 | x->name = xstrdup(name_b); | |
6973dcae JH |
1362 | x->is_renamed = 1; |
1363 | } | |
f604652e JH |
1364 | else { |
1365 | x->from_name = NULL; | |
9befac47 | 1366 | x->name = xstrdup(name_a); |
f604652e | 1367 | } |
6973dcae JH |
1368 | return x; |
1369 | } | |
1370 | ||
1371 | static void diffstat_consume(void *priv, char *line, unsigned long len) | |
1372 | { | |
1373 | struct diffstat_t *diffstat = priv; | |
1374 | struct diffstat_file *x = diffstat->files[diffstat->nr - 1]; | |
1375 | ||
1376 | if (line[0] == '+') | |
1377 | x->added++; | |
1378 | else if (line[0] == '-') | |
1379 | x->deleted++; | |
1380 | } | |
1381 | ||
698ce6f8 | 1382 | const char mime_boundary_leader[] = "------------"; |
6973dcae | 1383 | |
a2540023 JH |
1384 | static int scale_linear(int it, int width, int max_change) |
1385 | { | |
2eeeef24 JH |
1386 | if (!it) |
1387 | return 0; | |
a2540023 | 1388 | /* |
2eeeef24 JH |
1389 | * make sure that at least one '-' or '+' is printed if |
1390 | * there is any change to this path. The easiest way is to | |
1391 | * scale linearly as if the alloted width is one column shorter | |
1392 | * than it is, and then add 1 to the result. | |
a2540023 | 1393 | */ |
2eeeef24 | 1394 | return 1 + (it * (width - 1) / max_change); |
a2540023 JH |
1395 | } |
1396 | ||
c0c77734 | 1397 | static void show_name(FILE *file, |
a408e0e6 | 1398 | const char *prefix, const char *name, int len) |
a2540023 | 1399 | { |
a408e0e6 | 1400 | fprintf(file, " %s%-*s |", prefix, len, name); |
a2540023 JH |
1401 | } |
1402 | ||
c0c77734 | 1403 | static void show_graph(FILE *file, char ch, int cnt, const char *set, const char *reset) |
a2540023 JH |
1404 | { |
1405 | if (cnt <= 0) | |
1406 | return; | |
c0c77734 | 1407 | fprintf(file, "%s", set); |
a2540023 | 1408 | while (cnt--) |
c0c77734 DB |
1409 | putc(ch, file); |
1410 | fprintf(file, "%s", reset); | |
a2540023 JH |
1411 | } |
1412 | ||
f604652e JH |
1413 | static void fill_print_name(struct diffstat_file *file) |
1414 | { | |
1415 | char *pname; | |
1416 | ||
1417 | if (file->print_name) | |
1418 | return; | |
1419 | ||
1420 | if (!file->is_renamed) { | |
f285a2d7 | 1421 | struct strbuf buf = STRBUF_INIT; |
f604652e JH |
1422 | if (quote_c_style(file->name, &buf, NULL, 0)) { |
1423 | pname = strbuf_detach(&buf, NULL); | |
1424 | } else { | |
1425 | pname = file->name; | |
1426 | strbuf_release(&buf); | |
1427 | } | |
1428 | } else { | |
1429 | pname = pprint_rename(file->from_name, file->name); | |
1430 | } | |
1431 | file->print_name = pname; | |
1432 | } | |
1433 | ||
7f814632 NTND |
1434 | int print_stat_summary(FILE *fp, int files, int insertions, int deletions) |
1435 | { | |
1436 | struct strbuf sb = STRBUF_INIT; | |
1437 | int ret; | |
1438 | ||
1439 | if (!files) { | |
1440 | assert(insertions == 0 && deletions == 0); | |
218adaaa | 1441 | return fprintf(fp, "%s\n", " 0 files changed"); |
7f814632 NTND |
1442 | } |
1443 | ||
1444 | strbuf_addf(&sb, | |
218adaaa | 1445 | (files == 1) ? " %d file changed" : " %d files changed", |
7f814632 NTND |
1446 | files); |
1447 | ||
1448 | /* | |
1449 | * For binary diff, the caller may want to print "x files | |
1450 | * changed" with insertions == 0 && deletions == 0. | |
1451 | * | |
1452 | * Not omitting "0 insertions(+), 0 deletions(-)" in this case | |
1453 | * is probably less confusing (i.e skip over "2 files changed | |
1454 | * but nothing about added/removed lines? Is this a bug in Git?"). | |
1455 | */ | |
1456 | if (insertions || deletions == 0) { | |
1457 | /* | |
1458 | * TRANSLATORS: "+" in (+) is a line addition marker; | |
1459 | * do not translate it. | |
1460 | */ | |
1461 | strbuf_addf(&sb, | |
218adaaa | 1462 | (insertions == 1) ? ", %d insertion(+)" : ", %d insertions(+)", |
7f814632 NTND |
1463 | insertions); |
1464 | } | |
1465 | ||
1466 | if (deletions || insertions == 0) { | |
1467 | /* | |
1468 | * TRANSLATORS: "-" in (-) is a line removal marker; | |
1469 | * do not translate it. | |
1470 | */ | |
1471 | strbuf_addf(&sb, | |
218adaaa | 1472 | (deletions == 1) ? ", %d deletion(-)" : ", %d deletions(-)", |
7f814632 NTND |
1473 | deletions); |
1474 | } | |
1475 | strbuf_addch(&sb, '\n'); | |
1476 | ret = fputs(sb.buf, fp); | |
1477 | strbuf_release(&sb); | |
1478 | return ret; | |
1479 | } | |
1480 | ||
4b25d091 | 1481 | static void show_stats(struct diffstat_t *data, struct diff_options *options) |
6973dcae | 1482 | { |
eb3a9dd3 | 1483 | int i, len, add, del, adds = 0, dels = 0; |
0974c117 | 1484 | uintmax_t max_change = 0, max_len = 0; |
dc801e71 ZJS |
1485 | int total_files = data->nr, count; |
1486 | int width, name_width, graph_width, number_width = 0, bin_width = 0; | |
c0aa335c | 1487 | const char *reset, *add_c, *del_c; |
7be57610 | 1488 | const char *line_prefix = ""; |
e5f85df8 | 1489 | int extra_shown = 0; |
7be57610 | 1490 | struct strbuf *msg = NULL; |
6973dcae JH |
1491 | |
1492 | if (data->nr == 0) | |
1493 | return; | |
1494 | ||
7be57610 BY |
1495 | if (options->output_prefix) { |
1496 | msg = options->output_prefix(options, options->output_prefix_data); | |
1497 | line_prefix = msg->buf; | |
1498 | } | |
1499 | ||
808e1db2 | 1500 | count = options->stat_count ? options->stat_count : data->nr; |
a2540023 | 1501 | |
8f67f8ae | 1502 | reset = diff_get_color_opt(options, DIFF_RESET); |
8f67f8ae PH |
1503 | add_c = diff_get_color_opt(options, DIFF_FILE_NEW); |
1504 | del_c = diff_get_color_opt(options, DIFF_FILE_OLD); | |
785f7432 | 1505 | |
1b058bc3 ZJS |
1506 | /* |
1507 | * Find the longest filename and max number of changes | |
1508 | */ | |
808e1db2 | 1509 | for (i = 0; (i < count) && (i < data->nr); i++) { |
6973dcae | 1510 | struct diffstat_file *file = data->files[i]; |
0974c117 | 1511 | uintmax_t change = file->added + file->deleted; |
af0ed819 JH |
1512 | |
1513 | if (!file->is_interesting && (change == 0)) { | |
808e1db2 | 1514 | count++; /* not shown == room for one more */ |
358e460e MG |
1515 | continue; |
1516 | } | |
f604652e JH |
1517 | fill_print_name(file); |
1518 | len = strlen(file->print_name); | |
6973dcae JH |
1519 | if (max_len < len) |
1520 | max_len = len; | |
1521 | ||
dc801e71 ZJS |
1522 | if (file->is_unmerged) { |
1523 | /* "Unmerged" is 8 characters */ | |
1524 | bin_width = bin_width < 8 ? 8 : bin_width; | |
6973dcae | 1525 | continue; |
dc801e71 ZJS |
1526 | } |
1527 | if (file->is_binary) { | |
1528 | /* "Bin XXX -> YYY bytes" */ | |
1529 | int w = 14 + decimal_width(file->added) | |
1530 | + decimal_width(file->deleted); | |
1531 | bin_width = bin_width < w ? w : bin_width; | |
1532 | /* Display change counts aligned with "Bin" */ | |
1533 | number_width = 3; | |
1534 | continue; | |
1535 | } | |
1536 | ||
a2540023 JH |
1537 | if (max_change < change) |
1538 | max_change = change; | |
6973dcae | 1539 | } |
a20d3c0d | 1540 | count = i; /* where we can stop scanning in data->files[] */ |
6973dcae | 1541 | |
1b058bc3 ZJS |
1542 | /* |
1543 | * We have width = stat_width or term_columns() columns total. | |
1544 | * We want a maximum of min(max_len, stat_name_width) for the name part. | |
969fe57b | 1545 | * We want a maximum of min(max_change, stat_graph_width) for the +- part. |
1b058bc3 ZJS |
1546 | * We also need 1 for " " and 4 + decimal_width(max_change) |
1547 | * for " | NNNN " and one the empty column at the end, altogether | |
1548 | * 6 + decimal_width(max_change). | |
1549 | * | |
1550 | * If there's not enough space, we will use the smaller of | |
1551 | * stat_name_width (if set) and 5/8*width for the filename, | |
969fe57b ZJS |
1552 | * and the rest for constant elements + graph part, but no more |
1553 | * than stat_graph_width for the graph part. | |
1b058bc3 ZJS |
1554 | * (5/8 gives 50 for filename and 30 for the constant parts + graph |
1555 | * for the standard terminal size). | |
a2540023 | 1556 | * |
1b058bc3 ZJS |
1557 | * In other words: stat_width limits the maximum width, and |
1558 | * stat_name_width fixes the maximum width of the filename, | |
1559 | * and is also used to divide available columns if there | |
1560 | * aren't enough. | |
dc801e71 ZJS |
1561 | * |
1562 | * Binary files are displayed with "Bin XXX -> YYY bytes" | |
1563 | * instead of the change count and graph. This part is treated | |
1564 | * similarly to the graph part, except that it is not | |
1565 | * "scaled". If total width is too small to accomodate the | |
1566 | * guaranteed minimum width of the filename part and the | |
1567 | * separators and this message, this message will "overflow" | |
1568 | * making the line longer than the maximum width. | |
a2540023 | 1569 | */ |
1b058bc3 ZJS |
1570 | |
1571 | if (options->stat_width == -1) | |
3f145132 | 1572 | width = term_columns() - options->output_prefix_length; |
a2540023 | 1573 | else |
1b058bc3 | 1574 | width = options->stat_width ? options->stat_width : 80; |
dc801e71 ZJS |
1575 | number_width = decimal_width(max_change) > number_width ? |
1576 | decimal_width(max_change) : number_width; | |
a2540023 | 1577 | |
df44483a ZJS |
1578 | if (options->stat_graph_width == -1) |
1579 | options->stat_graph_width = diff_stat_graph_width; | |
a2540023 | 1580 | |
1b058bc3 ZJS |
1581 | /* |
1582 | * Guarantee 3/8*16==6 for the graph part | |
1583 | * and 5/8*16==10 for the filename part | |
1584 | */ | |
1585 | if (width < 16 + 6 + number_width) | |
1586 | width = 16 + 6 + number_width; | |
1587 | ||
1588 | /* | |
1589 | * First assign sizes that are wanted, ignoring available width. | |
dc801e71 ZJS |
1590 | * strlen("Bin XXX -> YYY bytes") == bin_width, and the part |
1591 | * starting from "XXX" should fit in graph_width. | |
1b058bc3 | 1592 | */ |
dc801e71 ZJS |
1593 | graph_width = max_change + 4 > bin_width ? max_change : bin_width - 4; |
1594 | if (options->stat_graph_width && | |
1595 | options->stat_graph_width < graph_width) | |
1596 | graph_width = options->stat_graph_width; | |
1597 | ||
1b058bc3 ZJS |
1598 | name_width = (options->stat_name_width > 0 && |
1599 | options->stat_name_width < max_len) ? | |
1600 | options->stat_name_width : max_len; | |
1601 | ||
1602 | /* | |
1603 | * Adjust adjustable widths not to exceed maximum width | |
1604 | */ | |
1605 | if (name_width + number_width + 6 + graph_width > width) { | |
678c5741 | 1606 | if (graph_width > width * 3/8 - number_width - 6) { |
1b058bc3 | 1607 | graph_width = width * 3/8 - number_width - 6; |
678c5741 LP |
1608 | if (graph_width < 6) |
1609 | graph_width = 6; | |
1610 | } | |
1611 | ||
969fe57b ZJS |
1612 | if (options->stat_graph_width && |
1613 | graph_width > options->stat_graph_width) | |
1614 | graph_width = options->stat_graph_width; | |
1b058bc3 ZJS |
1615 | if (name_width > width - number_width - 6 - graph_width) |
1616 | name_width = width - number_width - 6 - graph_width; | |
1617 | else | |
1618 | graph_width = width - number_width - 6 - name_width; | |
1619 | } | |
1620 | ||
1621 | /* | |
1622 | * From here name_width is the width of the name area, | |
1623 | * and graph_width is the width of the graph area. | |
1624 | * max_change is used to scale graph properly. | |
1625 | */ | |
808e1db2 | 1626 | for (i = 0; i < count; i++) { |
d2543b8e | 1627 | const char *prefix = ""; |
af0ed819 JH |
1628 | struct diffstat_file *file = data->files[i]; |
1629 | char *name = file->print_name; | |
1630 | uintmax_t added = file->added; | |
1631 | uintmax_t deleted = file->deleted; | |
a2540023 | 1632 | int name_len; |
6973dcae | 1633 | |
a20d3c0d | 1634 | if (!file->is_interesting && (added + deleted == 0)) |
358e460e | 1635 | continue; |
a20d3c0d | 1636 | |
6973dcae JH |
1637 | /* |
1638 | * "scale" the filename | |
1639 | */ | |
a2540023 JH |
1640 | len = name_width; |
1641 | name_len = strlen(name); | |
1642 | if (name_width < name_len) { | |
6973dcae JH |
1643 | char *slash; |
1644 | prefix = "..."; | |
a2540023 JH |
1645 | len -= 3; |
1646 | name += name_len - len; | |
6973dcae JH |
1647 | slash = strchr(name, '/'); |
1648 | if (slash) | |
1649 | name = slash; | |
1650 | } | |
6973dcae | 1651 | |
af0ed819 | 1652 | if (file->is_binary) { |
7be57610 | 1653 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1654 | show_name(options->file, prefix, name, len); |
fc1320bf | 1655 | fprintf(options->file, " %*s", number_width, "Bin"); |
e18872b2 ZJS |
1656 | if (!added && !deleted) { |
1657 | putc('\n', options->file); | |
1658 | continue; | |
1659 | } | |
1660 | fprintf(options->file, " %s%"PRIuMAX"%s", | |
0974c117 | 1661 | del_c, deleted, reset); |
c0c77734 | 1662 | fprintf(options->file, " -> "); |
0974c117 JK |
1663 | fprintf(options->file, "%s%"PRIuMAX"%s", |
1664 | add_c, added, reset); | |
c0c77734 DB |
1665 | fprintf(options->file, " bytes"); |
1666 | fprintf(options->file, "\n"); | |
f604652e | 1667 | continue; |
6973dcae | 1668 | } |
af0ed819 | 1669 | else if (file->is_unmerged) { |
7be57610 | 1670 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1671 | show_name(options->file, prefix, name, len); |
dc801e71 | 1672 | fprintf(options->file, " Unmerged\n"); |
f604652e | 1673 | continue; |
6973dcae | 1674 | } |
6973dcae | 1675 | |
a2540023 JH |
1676 | /* |
1677 | * scale the add/delete | |
1678 | */ | |
6973dcae JH |
1679 | add = added; |
1680 | del = deleted; | |
6973dcae | 1681 | |
1b058bc3 | 1682 | if (graph_width <= max_change) { |
2eeeef24 JH |
1683 | int total = add + del; |
1684 | ||
1b058bc3 | 1685 | total = scale_linear(add + del, graph_width, max_change); |
2eeeef24 JH |
1686 | if (total < 2 && add && del) |
1687 | /* width >= 2 due to the sanity check */ | |
1688 | total = 2; | |
1689 | if (add < del) { | |
1b058bc3 | 1690 | add = scale_linear(add, graph_width, max_change); |
2eeeef24 JH |
1691 | del = total - add; |
1692 | } else { | |
1b058bc3 | 1693 | del = scale_linear(del, graph_width, max_change); |
2eeeef24 JH |
1694 | add = total - del; |
1695 | } | |
6973dcae | 1696 | } |
7be57610 | 1697 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1698 | show_name(options->file, prefix, name, len); |
dc801e71 ZJS |
1699 | fprintf(options->file, " %*"PRIuMAX"%s", |
1700 | number_width, added + deleted, | |
1701 | added + deleted ? " " : ""); | |
c0c77734 DB |
1702 | show_graph(options->file, '+', add, add_c, reset); |
1703 | show_graph(options->file, '-', del, del_c, reset); | |
1704 | fprintf(options->file, "\n"); | |
1705 | } | |
a20d3c0d JH |
1706 | |
1707 | for (i = 0; i < data->nr; i++) { | |
af0ed819 JH |
1708 | struct diffstat_file *file = data->files[i]; |
1709 | uintmax_t added = file->added; | |
1710 | uintmax_t deleted = file->deleted; | |
82dfc2c4 JH |
1711 | |
1712 | if (file->is_unmerged || | |
1713 | (!file->is_interesting && (added + deleted == 0))) { | |
808e1db2 MG |
1714 | total_files--; |
1715 | continue; | |
1716 | } | |
a20d3c0d | 1717 | |
82dfc2c4 | 1718 | if (!file->is_binary) { |
a20d3c0d JH |
1719 | adds += added; |
1720 | dels += deleted; | |
1721 | } | |
1722 | if (i < count) | |
1723 | continue; | |
e5f85df8 JH |
1724 | if (!extra_shown) |
1725 | fprintf(options->file, "%s ...\n", line_prefix); | |
1726 | extra_shown = 1; | |
808e1db2 | 1727 | } |
7be57610 | 1728 | fprintf(options->file, "%s", line_prefix); |
7f814632 | 1729 | print_stat_summary(options->file, total_files, adds, dels); |
6973dcae JH |
1730 | } |
1731 | ||
2775d92c | 1732 | static void show_shortstats(struct diffstat_t *data, struct diff_options *options) |
ebd124c6 NP |
1733 | { |
1734 | int i, adds = 0, dels = 0, total_files = data->nr; | |
1735 | ||
1736 | if (data->nr == 0) | |
1737 | return; | |
1738 | ||
1739 | for (i = 0; i < data->nr; i++) { | |
e18872b2 ZJS |
1740 | int added = data->files[i]->added; |
1741 | int deleted= data->files[i]->deleted; | |
1742 | ||
20c8cde4 JH |
1743 | if (data->files[i]->is_unmerged || |
1744 | (!data->files[i]->is_interesting && (added + deleted == 0))) { | |
e18872b2 | 1745 | total_files--; |
de9658b5 | 1746 | } else if (!data->files[i]->is_binary) { /* don't count bytes */ |
e18872b2 ZJS |
1747 | adds += added; |
1748 | dels += deleted; | |
ebd124c6 | 1749 | } |
ebd124c6 | 1750 | } |
7be57610 BY |
1751 | if (options->output_prefix) { |
1752 | struct strbuf *msg = NULL; | |
1753 | msg = options->output_prefix(options, | |
1754 | options->output_prefix_data); | |
1755 | fprintf(options->file, "%s", msg->buf); | |
1756 | } | |
7f814632 | 1757 | print_stat_summary(options->file, total_files, adds, dels); |
ebd124c6 NP |
1758 | } |
1759 | ||
4b25d091 | 1760 | static void show_numstat(struct diffstat_t *data, struct diff_options *options) |
74e2abe5 JH |
1761 | { |
1762 | int i; | |
1763 | ||
f604652e JH |
1764 | if (data->nr == 0) |
1765 | return; | |
1766 | ||
74e2abe5 JH |
1767 | for (i = 0; i < data->nr; i++) { |
1768 | struct diffstat_file *file = data->files[i]; | |
1769 | ||
7be57610 BY |
1770 | if (options->output_prefix) { |
1771 | struct strbuf *msg = NULL; | |
1772 | msg = options->output_prefix(options, | |
1773 | options->output_prefix_data); | |
1774 | fprintf(options->file, "%s", msg->buf); | |
1775 | } | |
1776 | ||
bfddbc5e | 1777 | if (file->is_binary) |
c0c77734 | 1778 | fprintf(options->file, "-\t-\t"); |
bfddbc5e | 1779 | else |
c0c77734 | 1780 | fprintf(options->file, |
0974c117 JK |
1781 | "%"PRIuMAX"\t%"PRIuMAX"\t", |
1782 | file->added, file->deleted); | |
f604652e JH |
1783 | if (options->line_termination) { |
1784 | fill_print_name(file); | |
1785 | if (!file->is_renamed) | |
c0c77734 | 1786 | write_name_quoted(file->name, options->file, |
f604652e JH |
1787 | options->line_termination); |
1788 | else { | |
c0c77734 DB |
1789 | fputs(file->print_name, options->file); |
1790 | putc(options->line_termination, options->file); | |
f604652e | 1791 | } |
663af342 | 1792 | } else { |
f604652e | 1793 | if (file->is_renamed) { |
c0c77734 DB |
1794 | putc('\0', options->file); |
1795 | write_name_quoted(file->from_name, options->file, '\0'); | |
f604652e | 1796 | } |
c0c77734 | 1797 | write_name_quoted(file->name, options->file, '\0'); |
663af342 | 1798 | } |
74e2abe5 JH |
1799 | } |
1800 | } | |
1801 | ||
c04a7155 JH |
1802 | struct dirstat_file { |
1803 | const char *name; | |
1804 | unsigned long changed; | |
7df7c019 LT |
1805 | }; |
1806 | ||
c04a7155 JH |
1807 | struct dirstat_dir { |
1808 | struct dirstat_file *files; | |
712d2c7d | 1809 | int alloc, nr, permille, cumulative; |
c04a7155 JH |
1810 | }; |
1811 | ||
7be57610 BY |
1812 | static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir, |
1813 | unsigned long changed, const char *base, int baselen) | |
7df7c019 LT |
1814 | { |
1815 | unsigned long this_dir = 0; | |
1816 | unsigned int sources = 0; | |
7be57610 BY |
1817 | const char *line_prefix = ""; |
1818 | struct strbuf *msg = NULL; | |
1819 | ||
1820 | if (opt->output_prefix) { | |
1821 | msg = opt->output_prefix(opt, opt->output_prefix_data); | |
1822 | line_prefix = msg->buf; | |
1823 | } | |
7df7c019 LT |
1824 | |
1825 | while (dir->nr) { | |
c04a7155 | 1826 | struct dirstat_file *f = dir->files; |
7df7c019 LT |
1827 | int namelen = strlen(f->name); |
1828 | unsigned long this; | |
1829 | char *slash; | |
1830 | ||
1831 | if (namelen < baselen) | |
1832 | break; | |
1833 | if (memcmp(f->name, base, baselen)) | |
1834 | break; | |
1835 | slash = strchr(f->name + baselen, '/'); | |
1836 | if (slash) { | |
1837 | int newbaselen = slash + 1 - f->name; | |
7be57610 | 1838 | this = gather_dirstat(opt, dir, changed, f->name, newbaselen); |
7df7c019 LT |
1839 | sources++; |
1840 | } else { | |
c04a7155 | 1841 | this = f->changed; |
7df7c019 LT |
1842 | dir->files++; |
1843 | dir->nr--; | |
1844 | sources += 2; | |
1845 | } | |
1846 | this_dir += this; | |
1847 | } | |
1848 | ||
1849 | /* | |
1850 | * We don't report dirstat's for | |
1851 | * - the top level | |
1852 | * - or cases where everything came from a single directory | |
1853 | * under this directory (sources == 1). | |
1854 | */ | |
1855 | if (baselen && sources != 1) { | |
58a8756a JH |
1856 | if (this_dir) { |
1857 | int permille = this_dir * 1000 / changed; | |
712d2c7d | 1858 | if (permille >= dir->permille) { |
7be57610 | 1859 | fprintf(opt->file, "%s%4d.%01d%% %.*s\n", line_prefix, |
712d2c7d | 1860 | permille / 10, permille % 10, baselen, base); |
7df7c019 LT |
1861 | if (!dir->cumulative) |
1862 | return 0; | |
1863 | } | |
1864 | } | |
1865 | } | |
1866 | return this_dir; | |
1867 | } | |
1868 | ||
441bca0b LT |
1869 | static int dirstat_compare(const void *_a, const void *_b) |
1870 | { | |
1871 | const struct dirstat_file *a = _a; | |
1872 | const struct dirstat_file *b = _b; | |
1873 | return strcmp(a->name, b->name); | |
1874 | } | |
1875 | ||
c04a7155 | 1876 | static void show_dirstat(struct diff_options *options) |
7df7c019 LT |
1877 | { |
1878 | int i; | |
1879 | unsigned long changed; | |
c04a7155 JH |
1880 | struct dirstat_dir dir; |
1881 | struct diff_queue_struct *q = &diff_queued_diff; | |
1882 | ||
1883 | dir.files = NULL; | |
1884 | dir.alloc = 0; | |
1885 | dir.nr = 0; | |
712d2c7d | 1886 | dir.permille = options->dirstat_permille; |
f88d225f | 1887 | dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); |
7df7c019 | 1888 | |
7df7c019 | 1889 | changed = 0; |
c04a7155 JH |
1890 | for (i = 0; i < q->nr; i++) { |
1891 | struct diff_filepair *p = q->queue[i]; | |
1892 | const char *name; | |
1893 | unsigned long copied, added, damage; | |
0133dab7 | 1894 | int content_changed; |
c04a7155 | 1895 | |
2ca86714 | 1896 | name = p->two->path ? p->two->path : p->one->path; |
c04a7155 | 1897 | |
0133dab7 JH |
1898 | if (p->one->sha1_valid && p->two->sha1_valid) |
1899 | content_changed = hashcmp(p->one->sha1, p->two->sha1); | |
1900 | else | |
1901 | content_changed = 1; | |
1902 | ||
2ff3a803 JH |
1903 | if (!content_changed) { |
1904 | /* | |
1905 | * The SHA1 has not changed, so pre-/post-content is | |
1906 | * identical. We can therefore skip looking at the | |
1907 | * file contents altogether. | |
1908 | */ | |
1909 | damage = 0; | |
1910 | goto found_damage; | |
1911 | } | |
1912 | ||
0133dab7 JH |
1913 | if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE)) { |
1914 | /* | |
1915 | * In --dirstat-by-file mode, we don't really need to | |
1916 | * look at the actual file contents at all. | |
1917 | * The fact that the SHA1 changed is enough for us to | |
1918 | * add this file to the list of results | |
1919 | * (with each file contributing equal damage). | |
1920 | */ | |
2ff3a803 | 1921 | damage = 1; |
0133dab7 JH |
1922 | goto found_damage; |
1923 | } | |
c04a7155 JH |
1924 | |
1925 | if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) { | |
1926 | diff_populate_filespec(p->one, 0); | |
1927 | diff_populate_filespec(p->two, 0); | |
1928 | diffcore_count_changes(p->one, p->two, NULL, NULL, 0, | |
1929 | &copied, &added); | |
1930 | diff_free_filespec_data(p->one); | |
1931 | diff_free_filespec_data(p->two); | |
1932 | } else if (DIFF_FILE_VALID(p->one)) { | |
1933 | diff_populate_filespec(p->one, 1); | |
1934 | copied = added = 0; | |
1935 | diff_free_filespec_data(p->one); | |
1936 | } else if (DIFF_FILE_VALID(p->two)) { | |
1937 | diff_populate_filespec(p->two, 1); | |
1938 | copied = 0; | |
1939 | added = p->two->size; | |
1940 | diff_free_filespec_data(p->two); | |
1941 | } else | |
2b0b551d | 1942 | continue; |
c04a7155 JH |
1943 | |
1944 | /* | |
1945 | * Original minus copied is the removed material, | |
1946 | * added is the new material. They are both damages | |
0133dab7 | 1947 | * made to the preimage. |
2ff3a803 JH |
1948 | * If the resulting damage is zero, we know that |
1949 | * diffcore_count_changes() considers the two entries to | |
1950 | * be identical, but since content_changed is true, we | |
1951 | * know that there must have been _some_ kind of change, | |
1952 | * so we force all entries to have damage > 0. | |
c04a7155 JH |
1953 | */ |
1954 | damage = (p->one->size - copied) + added; | |
2ff3a803 | 1955 | if (!damage) |
fd33777b | 1956 | damage = 1; |
c04a7155 | 1957 | |
0133dab7 | 1958 | found_damage: |
c04a7155 JH |
1959 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); |
1960 | dir.files[dir.nr].name = name; | |
1961 | dir.files[dir.nr].changed = damage; | |
1962 | changed += damage; | |
1963 | dir.nr++; | |
7df7c019 LT |
1964 | } |
1965 | ||
1966 | /* This can happen even with many files, if everything was renames */ | |
1967 | if (!changed) | |
1968 | return; | |
1969 | ||
1970 | /* Show all directories with more than x% of the changes */ | |
441bca0b | 1971 | qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); |
7be57610 | 1972 | gather_dirstat(options, &dir, changed, "", 0); |
7df7c019 LT |
1973 | } |
1974 | ||
1c57a627 JH |
1975 | static void show_dirstat_by_line(struct diffstat_t *data, struct diff_options *options) |
1976 | { | |
1977 | int i; | |
1978 | unsigned long changed; | |
1979 | struct dirstat_dir dir; | |
1980 | ||
1981 | if (data->nr == 0) | |
1982 | return; | |
1983 | ||
1984 | dir.files = NULL; | |
1985 | dir.alloc = 0; | |
1986 | dir.nr = 0; | |
1987 | dir.permille = options->dirstat_permille; | |
1988 | dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); | |
1989 | ||
1990 | changed = 0; | |
1991 | for (i = 0; i < data->nr; i++) { | |
1992 | struct diffstat_file *file = data->files[i]; | |
1993 | unsigned long damage = file->added + file->deleted; | |
1994 | if (file->is_binary) | |
1995 | /* | |
1996 | * binary files counts bytes, not lines. Must find some | |
1997 | * way to normalize binary bytes vs. textual lines. | |
1998 | * The following heuristic assumes that there are 64 | |
1999 | * bytes per "line". | |
2000 | * This is stupid and ugly, but very cheap... | |
2001 | */ | |
2002 | damage = (damage + 63) / 64; | |
2003 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); | |
2004 | dir.files[dir.nr].name = file->name; | |
2005 | dir.files[dir.nr].changed = damage; | |
2006 | changed += damage; | |
2007 | dir.nr++; | |
2008 | } | |
2009 | ||
2010 | /* This can happen even with many files, if everything was renames */ | |
2011 | if (!changed) | |
2012 | return; | |
2013 | ||
2014 | /* Show all directories with more than x% of the changes */ | |
2015 | qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); | |
2016 | gather_dirstat(options, &dir, changed, "", 0); | |
2017 | } | |
2018 | ||
f604652e JH |
2019 | static void free_diffstat_info(struct diffstat_t *diffstat) |
2020 | { | |
2021 | int i; | |
2022 | for (i = 0; i < diffstat->nr; i++) { | |
2023 | struct diffstat_file *f = diffstat->files[i]; | |
2024 | if (f->name != f->print_name) | |
2025 | free(f->print_name); | |
2026 | free(f->name); | |
2027 | free(f->from_name); | |
2028 | free(f); | |
2029 | } | |
2030 | free(diffstat->files); | |
2031 | } | |
2032 | ||
88246898 | 2033 | struct checkdiff_t { |
88246898 | 2034 | const char *filename; |
1ba111d1 | 2035 | int lineno; |
a757c646 | 2036 | int conflict_marker_size; |
1ba111d1 | 2037 | struct diff_options *o; |
cf1b7869 | 2038 | unsigned ws_rule; |
62c64895 | 2039 | unsigned status; |
88246898 JS |
2040 | }; |
2041 | ||
a757c646 | 2042 | static int is_conflict_marker(const char *line, int marker_size, unsigned long len) |
04954043 JH |
2043 | { |
2044 | char firstchar; | |
2045 | int cnt; | |
2046 | ||
a757c646 | 2047 | if (len < marker_size + 1) |
04954043 JH |
2048 | return 0; |
2049 | firstchar = line[0]; | |
2050 | switch (firstchar) { | |
a757c646 | 2051 | case '=': case '>': case '<': case '|': |
04954043 JH |
2052 | break; |
2053 | default: | |
2054 | return 0; | |
2055 | } | |
a757c646 | 2056 | for (cnt = 1; cnt < marker_size; cnt++) |
04954043 JH |
2057 | if (line[cnt] != firstchar) |
2058 | return 0; | |
a757c646 JH |
2059 | /* line[1] thru line[marker_size-1] are same as firstchar */ |
2060 | if (len < marker_size + 1 || !isspace(line[marker_size])) | |
04954043 | 2061 | return 0; |
04954043 JH |
2062 | return 1; |
2063 | } | |
2064 | ||
88246898 JS |
2065 | static void checkdiff_consume(void *priv, char *line, unsigned long len) |
2066 | { | |
2067 | struct checkdiff_t *data = priv; | |
a757c646 | 2068 | int marker_size = data->conflict_marker_size; |
f1c96261 JK |
2069 | const char *ws = diff_get_color(data->o->use_color, DIFF_WHITESPACE); |
2070 | const char *reset = diff_get_color(data->o->use_color, DIFF_RESET); | |
2071 | const char *set = diff_get_color(data->o->use_color, DIFF_FILE_NEW); | |
c1795bb0 | 2072 | char *err; |
7be57610 BY |
2073 | char *line_prefix = ""; |
2074 | struct strbuf *msgbuf; | |
2075 | ||
2076 | assert(data->o); | |
2077 | if (data->o->output_prefix) { | |
2078 | msgbuf = data->o->output_prefix(data->o, | |
2079 | data->o->output_prefix_data); | |
2080 | line_prefix = msgbuf->buf; | |
2081 | } | |
88246898 JS |
2082 | |
2083 | if (line[0] == '+') { | |
18374e58 | 2084 | unsigned bad; |
0ef617f4 | 2085 | data->lineno++; |
a757c646 | 2086 | if (is_conflict_marker(line + 1, marker_size, len - 1)) { |
04954043 JH |
2087 | data->status |= 1; |
2088 | fprintf(data->o->file, | |
7be57610 BY |
2089 | "%s%s:%d: leftover conflict marker\n", |
2090 | line_prefix, data->filename, data->lineno); | |
04954043 | 2091 | } |
8f8841e9 | 2092 | bad = ws_check(line + 1, len - 1, data->ws_rule); |
18374e58 | 2093 | if (!bad) |
c1795bb0 | 2094 | return; |
18374e58 JH |
2095 | data->status |= bad; |
2096 | err = whitespace_error_string(bad); | |
7be57610 BY |
2097 | fprintf(data->o->file, "%s%s:%d: %s.\n", |
2098 | line_prefix, data->filename, data->lineno, err); | |
c1795bb0 | 2099 | free(err); |
a3c158d4 | 2100 | emit_line(data->o, set, reset, line, 1); |
8f8841e9 | 2101 | ws_check_emit(line + 1, len - 1, data->ws_rule, |
1ba111d1 | 2102 | data->o->file, set, reset, ws); |
877f23cc | 2103 | } else if (line[0] == ' ') { |
88246898 | 2104 | data->lineno++; |
877f23cc | 2105 | } else if (line[0] == '@') { |
88246898 JS |
2106 | char *plus = strchr(line, '+'); |
2107 | if (plus) | |
0ef617f4 | 2108 | data->lineno = strtol(plus, NULL, 10) - 1; |
88246898 JS |
2109 | else |
2110 | die("invalid diff"); | |
2111 | } | |
2112 | } | |
2113 | ||
0660626c JH |
2114 | static unsigned char *deflate_it(char *data, |
2115 | unsigned long size, | |
2116 | unsigned long *result_size) | |
051308f6 | 2117 | { |
0660626c JH |
2118 | int bound; |
2119 | unsigned char *deflated; | |
ef49a7a0 | 2120 | git_zstream stream; |
0660626c JH |
2121 | |
2122 | memset(&stream, 0, sizeof(stream)); | |
55bb5c91 | 2123 | git_deflate_init(&stream, zlib_compression_level); |
225a6f10 | 2124 | bound = git_deflate_bound(&stream, size); |
0660626c JH |
2125 | deflated = xmalloc(bound); |
2126 | stream.next_out = deflated; | |
2127 | stream.avail_out = bound; | |
2128 | ||
2129 | stream.next_in = (unsigned char *)data; | |
2130 | stream.avail_in = size; | |
55bb5c91 | 2131 | while (git_deflate(&stream, Z_FINISH) == Z_OK) |
0660626c | 2132 | ; /* nothing */ |
55bb5c91 | 2133 | git_deflate_end(&stream); |
0660626c JH |
2134 | *result_size = stream.total_out; |
2135 | return deflated; | |
051308f6 JH |
2136 | } |
2137 | ||
7be57610 | 2138 | static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two, char *prefix) |
051308f6 | 2139 | { |
0660626c JH |
2140 | void *cp; |
2141 | void *delta; | |
2142 | void *deflated; | |
2143 | void *data; | |
2144 | unsigned long orig_size; | |
2145 | unsigned long delta_size; | |
2146 | unsigned long deflate_size; | |
2147 | unsigned long data_size; | |
051308f6 | 2148 | |
0660626c JH |
2149 | /* We could do deflated delta, or we could do just deflated two, |
2150 | * whichever is smaller. | |
051308f6 | 2151 | */ |
0660626c JH |
2152 | delta = NULL; |
2153 | deflated = deflate_it(two->ptr, two->size, &deflate_size); | |
2154 | if (one->size && two->size) { | |
2155 | delta = diff_delta(one->ptr, one->size, | |
2156 | two->ptr, two->size, | |
2157 | &delta_size, deflate_size); | |
2158 | if (delta) { | |
2159 | void *to_free = delta; | |
2160 | orig_size = delta_size; | |
2161 | delta = deflate_it(delta, delta_size, &delta_size); | |
2162 | free(to_free); | |
051308f6 JH |
2163 | } |
2164 | } | |
051308f6 | 2165 | |
0660626c | 2166 | if (delta && delta_size < deflate_size) { |
7be57610 | 2167 | fprintf(file, "%sdelta %lu\n", prefix, orig_size); |
0660626c JH |
2168 | free(deflated); |
2169 | data = delta; | |
2170 | data_size = delta_size; | |
2171 | } | |
2172 | else { | |
7be57610 | 2173 | fprintf(file, "%sliteral %lu\n", prefix, two->size); |
0660626c JH |
2174 | free(delta); |
2175 | data = deflated; | |
2176 | data_size = deflate_size; | |
2177 | } | |
051308f6 | 2178 | |
0660626c JH |
2179 | /* emit data encoded in base85 */ |
2180 | cp = data; | |
2181 | while (data_size) { | |
2182 | int bytes = (52 < data_size) ? 52 : data_size; | |
051308f6 | 2183 | char line[70]; |
0660626c | 2184 | data_size -= bytes; |
051308f6 JH |
2185 | if (bytes <= 26) |
2186 | line[0] = bytes + 'A' - 1; | |
2187 | else | |
2188 | line[0] = bytes - 26 + 'a' - 1; | |
2189 | encode_85(line + 1, cp, bytes); | |
1d7f171c | 2190 | cp = (char *) cp + bytes; |
7be57610 | 2191 | fprintf(file, "%s", prefix); |
c0c77734 DB |
2192 | fputs(line, file); |
2193 | fputc('\n', file); | |
051308f6 | 2194 | } |
7be57610 | 2195 | fprintf(file, "%s\n", prefix); |
0660626c | 2196 | free(data); |
051308f6 JH |
2197 | } |
2198 | ||
7be57610 | 2199 | static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two, char *prefix) |
d4c452f0 | 2200 | { |
7be57610 BY |
2201 | fprintf(file, "%sGIT binary patch\n", prefix); |
2202 | emit_binary_diff_body(file, one, two, prefix); | |
2203 | emit_binary_diff_body(file, two, one, prefix); | |
d4c452f0 JH |
2204 | } |
2205 | ||
29a3eefd JH |
2206 | int diff_filespec_is_binary(struct diff_filespec *one) |
2207 | { | |
122aa6f9 JK |
2208 | if (one->is_binary == -1) { |
2209 | diff_filespec_load_driver(one); | |
2210 | if (one->driver->binary != -1) | |
2211 | one->is_binary = one->driver->binary; | |
2212 | else { | |
2213 | if (!one->data && DIFF_FILE_VALID(one)) | |
2214 | diff_populate_filespec(one, 0); | |
2215 | if (one->data) | |
2216 | one->is_binary = buffer_is_binary(one->data, | |
2217 | one->size); | |
2218 | if (one->is_binary == -1) | |
2219 | one->is_binary = 0; | |
2220 | } | |
2221 | } | |
29a3eefd | 2222 | return one->is_binary; |
6973dcae JH |
2223 | } |
2224 | ||
be58e70d | 2225 | static const struct userdiff_funcname *diff_funcname_pattern(struct diff_filespec *one) |
f258475a | 2226 | { |
122aa6f9 JK |
2227 | diff_filespec_load_driver(one); |
2228 | return one->driver->funcname.pattern ? &one->driver->funcname : NULL; | |
f258475a JH |
2229 | } |
2230 | ||
a5a818ee JH |
2231 | void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b) |
2232 | { | |
2233 | if (!options->a_prefix) | |
2234 | options->a_prefix = a; | |
2235 | if (!options->b_prefix) | |
2236 | options->b_prefix = b; | |
2237 | } | |
2238 | ||
a788d7d5 | 2239 | struct userdiff_driver *get_textconv(struct diff_filespec *one) |
04427ac8 JK |
2240 | { |
2241 | if (!DIFF_FILE_VALID(one)) | |
2242 | return NULL; | |
d391c0ff | 2243 | |
04427ac8 | 2244 | diff_filespec_load_driver(one); |
3813e690 | 2245 | return userdiff_get_textconv(one->driver); |
04427ac8 JK |
2246 | } |
2247 | ||
6973dcae JH |
2248 | static void builtin_diff(const char *name_a, |
2249 | const char *name_b, | |
2250 | struct diff_filespec *one, | |
2251 | struct diff_filespec *two, | |
2252 | const char *xfrm_msg, | |
296c6bb2 | 2253 | int must_show_header, |
051308f6 | 2254 | struct diff_options *o, |
6973dcae JH |
2255 | int complete_rewrite) |
2256 | { | |
2257 | mmfile_t mf1, mf2; | |
2258 | const char *lbl[2]; | |
2259 | char *a_one, *b_two; | |
d9c552f1 | 2260 | const char *meta = diff_get_color_opt(o, DIFF_METAINFO); |
8f67f8ae | 2261 | const char *reset = diff_get_color_opt(o, DIFF_RESET); |
a5a818ee | 2262 | const char *a_prefix, *b_prefix; |
d9bae1a1 JK |
2263 | struct userdiff_driver *textconv_one = NULL; |
2264 | struct userdiff_driver *textconv_two = NULL; | |
3e97c7c6 | 2265 | struct strbuf header = STRBUF_INIT; |
7be57610 BY |
2266 | struct strbuf *msgbuf; |
2267 | char *line_prefix = ""; | |
2268 | ||
2269 | if (o->output_prefix) { | |
2270 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
2271 | line_prefix = msgbuf->buf; | |
2272 | } | |
a5a818ee | 2273 | |
752c0c24 JS |
2274 | if (DIFF_OPT_TST(o, SUBMODULE_LOG) && |
2275 | (!one->mode || S_ISGITLINK(one->mode)) && | |
2276 | (!two->mode || S_ISGITLINK(two->mode))) { | |
2277 | const char *del = diff_get_color_opt(o, DIFF_FILE_OLD); | |
2278 | const char *add = diff_get_color_opt(o, DIFF_FILE_NEW); | |
2279 | show_submodule_summary(o->file, one ? one->path : two->path, | |
721ceec1 | 2280 | one->sha1, two->sha1, two->dirty_submodule, |
4e215131 | 2281 | meta, del, add, reset); |
752c0c24 JS |
2282 | return; |
2283 | } | |
2284 | ||
3aa1f7ca JK |
2285 | if (DIFF_OPT_TST(o, ALLOW_TEXTCONV)) { |
2286 | textconv_one = get_textconv(one); | |
2287 | textconv_two = get_textconv(two); | |
2288 | } | |
2289 | ||
a5a818ee JH |
2290 | diff_set_mnemonic_prefix(o, "a/", "b/"); |
2291 | if (DIFF_OPT_TST(o, REVERSE_DIFF)) { | |
2292 | a_prefix = o->b_prefix; | |
2293 | b_prefix = o->a_prefix; | |
2294 | } else { | |
2295 | a_prefix = o->a_prefix; | |
2296 | b_prefix = o->b_prefix; | |
2297 | } | |
6973dcae | 2298 | |
71b989e7 LT |
2299 | /* Never use a non-valid filename anywhere if at all possible */ |
2300 | name_a = DIFF_FILE_VALID(one) ? name_a : name_b; | |
2301 | name_b = DIFF_FILE_VALID(two) ? name_b : name_a; | |
2302 | ||
a5a818ee JH |
2303 | a_one = quote_two(a_prefix, name_a + (*name_a == '/')); |
2304 | b_two = quote_two(b_prefix, name_b + (*name_b == '/')); | |
6973dcae JH |
2305 | lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; |
2306 | lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; | |
d9c552f1 | 2307 | strbuf_addf(&header, "%s%sdiff --git %s %s%s\n", line_prefix, meta, a_one, b_two, reset); |
6973dcae JH |
2308 | if (lbl[0][0] == '/') { |
2309 | /* /dev/null */ | |
d9c552f1 | 2310 | strbuf_addf(&header, "%s%snew file mode %06o%s\n", line_prefix, meta, two->mode, reset); |
37466447 BW |
2311 | if (xfrm_msg) |
2312 | strbuf_addstr(&header, xfrm_msg); | |
296c6bb2 | 2313 | must_show_header = 1; |
6973dcae JH |
2314 | } |
2315 | else if (lbl[1][0] == '/') { | |
d9c552f1 | 2316 | strbuf_addf(&header, "%s%sdeleted file mode %06o%s\n", line_prefix, meta, one->mode, reset); |
37466447 BW |
2317 | if (xfrm_msg) |
2318 | strbuf_addstr(&header, xfrm_msg); | |
296c6bb2 | 2319 | must_show_header = 1; |
6973dcae JH |
2320 | } |
2321 | else { | |
2322 | if (one->mode != two->mode) { | |
d9c552f1 JK |
2323 | strbuf_addf(&header, "%s%sold mode %06o%s\n", line_prefix, meta, one->mode, reset); |
2324 | strbuf_addf(&header, "%s%snew mode %06o%s\n", line_prefix, meta, two->mode, reset); | |
296c6bb2 | 2325 | must_show_header = 1; |
cd112cef | 2326 | } |
37466447 BW |
2327 | if (xfrm_msg) |
2328 | strbuf_addstr(&header, xfrm_msg); | |
3e97c7c6 | 2329 | |
6973dcae JH |
2330 | /* |
2331 | * we do not run diff between different kind | |
2332 | * of objects. | |
2333 | */ | |
2334 | if ((one->mode ^ two->mode) & S_IFMT) | |
2335 | goto free_ab_and_return; | |
0c01857d | 2336 | if (complete_rewrite && |
3aa1f7ca JK |
2337 | (textconv_one || !diff_filespec_is_binary(one)) && |
2338 | (textconv_two || !diff_filespec_is_binary(two))) { | |
3e97c7c6 GB |
2339 | fprintf(o->file, "%s", header.buf); |
2340 | strbuf_reset(&header); | |
3aa1f7ca JK |
2341 | emit_rewrite_diff(name_a, name_b, one, two, |
2342 | textconv_one, textconv_two, o); | |
34a5e1a2 | 2343 | o->found_changes = 1; |
6973dcae JH |
2344 | goto free_ab_and_return; |
2345 | } | |
2346 | } | |
2347 | ||
467ddc14 JH |
2348 | if (o->irreversible_delete && lbl[1][0] == '/') { |
2349 | fprintf(o->file, "%s", header.buf); | |
2350 | strbuf_reset(&header); | |
2351 | goto free_ab_and_return; | |
2352 | } else if (!DIFF_OPT_TST(o, TEXT) && | |
b3373982 JK |
2353 | ( (!textconv_one && diff_filespec_is_binary(one)) || |
2354 | (!textconv_two && diff_filespec_is_binary(two)) )) { | |
2355 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
2356 | die("unable to read files to diff"); | |
0660626c JH |
2357 | /* Quite common confusing case */ |
2358 | if (mf1.size == mf2.size && | |
296c6bb2 CC |
2359 | !memcmp(mf1.ptr, mf2.ptr, mf1.size)) { |
2360 | if (must_show_header) | |
2361 | fprintf(o->file, "%s", header.buf); | |
0660626c | 2362 | goto free_ab_and_return; |
296c6bb2 | 2363 | } |
3e97c7c6 GB |
2364 | fprintf(o->file, "%s", header.buf); |
2365 | strbuf_reset(&header); | |
8f67f8ae | 2366 | if (DIFF_OPT_TST(o, BINARY)) |
7be57610 | 2367 | emit_binary_diff(o->file, &mf1, &mf2, line_prefix); |
051308f6 | 2368 | else |
7be57610 BY |
2369 | fprintf(o->file, "%sBinary files %s and %s differ\n", |
2370 | line_prefix, lbl[0], lbl[1]); | |
34a5e1a2 | 2371 | o->found_changes = 1; |
467ddc14 | 2372 | } else { |
6973dcae JH |
2373 | /* Crazy xdl interfaces.. */ |
2374 | const char *diffopts = getenv("GIT_DIFF_OPTS"); | |
2375 | xpparam_t xpp; | |
2376 | xdemitconf_t xecfg; | |
6973dcae | 2377 | struct emit_callback ecbdata; |
be58e70d | 2378 | const struct userdiff_funcname *pe; |
f258475a | 2379 | |
b3f01ff2 | 2380 | if (must_show_header) { |
3e97c7c6 GB |
2381 | fprintf(o->file, "%s", header.buf); |
2382 | strbuf_reset(&header); | |
2383 | } | |
2384 | ||
840383b2 JK |
2385 | mf1.size = fill_textconv(textconv_one, one, &mf1.ptr); |
2386 | mf2.size = fill_textconv(textconv_two, two, &mf2.ptr); | |
04427ac8 | 2387 | |
45e7ca0f BC |
2388 | pe = diff_funcname_pattern(one); |
2389 | if (!pe) | |
2390 | pe = diff_funcname_pattern(two); | |
6973dcae | 2391 | |
9ccd0a88 | 2392 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2393 | memset(&xecfg, 0, sizeof(xecfg)); |
cd112cef | 2394 | memset(&ecbdata, 0, sizeof(ecbdata)); |
6973dcae | 2395 | ecbdata.label_path = lbl; |
daa0c3d9 | 2396 | ecbdata.color_diff = want_color(o->use_color); |
34a5e1a2 | 2397 | ecbdata.found_changesp = &o->found_changes; |
cf1b7869 | 2398 | ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a); |
690ed843 | 2399 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) |
d68fe26f | 2400 | check_blank_at_eof(&mf1, &mf2, &ecbdata); |
a3c158d4 | 2401 | ecbdata.opt = o; |
3e97c7c6 | 2402 | ecbdata.header = header.len ? &header : NULL; |
582aa00b | 2403 | xpp.flags = o->xdl_opts; |
ee1e5412 | 2404 | xecfg.ctxlen = o->context; |
6d0e674a | 2405 | xecfg.interhunkctxlen = o->interhunkcontext; |
6973dcae | 2406 | xecfg.flags = XDL_EMIT_FUNCNAMES; |
14937c2c RS |
2407 | if (DIFF_OPT_TST(o, FUNCCONTEXT)) |
2408 | xecfg.flags |= XDL_EMIT_FUNCCONTEXT; | |
45e7ca0f | 2409 | if (pe) |
a013585b | 2410 | xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags); |
6973dcae JH |
2411 | if (!diffopts) |
2412 | ; | |
cc44c765 | 2413 | else if (!prefixcmp(diffopts, "--unified=")) |
6973dcae | 2414 | xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10); |
cc44c765 | 2415 | else if (!prefixcmp(diffopts, "-u")) |
6973dcae | 2416 | xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10); |
77d1a520 TR |
2417 | if (o->word_diff) |
2418 | init_diff_words_data(&ecbdata, o, one, two); | |
8a3f524b | 2419 | xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata, |
dfea7900 | 2420 | &xpp, &xecfg); |
882749a0 | 2421 | if (o->word_diff) |
f59a59e2 | 2422 | free_diff_words_data(&ecbdata); |
04427ac8 JK |
2423 | if (textconv_one) |
2424 | free(mf1.ptr); | |
2425 | if (textconv_two) | |
2426 | free(mf2.ptr); | |
8cfe5f1c | 2427 | xdiff_clear_find_func(&xecfg); |
6973dcae JH |
2428 | } |
2429 | ||
2430 | free_ab_and_return: | |
3e97c7c6 | 2431 | strbuf_release(&header); |
fc3abdf5 JH |
2432 | diff_free_filespec_data(one); |
2433 | diff_free_filespec_data(two); | |
6973dcae JH |
2434 | free(a_one); |
2435 | free(b_two); | |
2436 | return; | |
2437 | } | |
2438 | ||
2439 | static void builtin_diffstat(const char *name_a, const char *name_b, | |
2440 | struct diff_filespec *one, | |
2441 | struct diff_filespec *two, | |
710158e3 | 2442 | struct diffstat_t *diffstat, |
0d21efa5 | 2443 | struct diff_options *o, |
74faaa16 | 2444 | struct diff_filepair *p) |
6973dcae JH |
2445 | { |
2446 | mmfile_t mf1, mf2; | |
2447 | struct diffstat_file *data; | |
352ca4e1 | 2448 | int same_contents; |
74faaa16 LT |
2449 | int complete_rewrite = 0; |
2450 | ||
2451 | if (!DIFF_PAIR_UNMERGED(p)) { | |
2452 | if (p->status == DIFF_STATUS_MODIFIED && p->score) | |
2453 | complete_rewrite = 1; | |
2454 | } | |
6973dcae JH |
2455 | |
2456 | data = diffstat_add(diffstat, name_a, name_b); | |
99bfd407 | 2457 | data->is_interesting = p->status != DIFF_STATUS_UNKNOWN; |
6973dcae JH |
2458 | |
2459 | if (!one || !two) { | |
2460 | data->is_unmerged = 1; | |
2461 | return; | |
2462 | } | |
ded0abc7 | 2463 | |
352ca4e1 ZJS |
2464 | same_contents = !hashcmp(one->sha1, two->sha1); |
2465 | ||
ded0abc7 | 2466 | if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) { |
ded0abc7 | 2467 | data->is_binary = 1; |
352ca4e1 | 2468 | if (same_contents) { |
e18872b2 ZJS |
2469 | data->added = 0; |
2470 | data->deleted = 0; | |
2471 | } else { | |
2472 | data->added = diff_filespec_size(two); | |
2473 | data->deleted = diff_filespec_size(one); | |
2474 | } | |
ded0abc7 JK |
2475 | } |
2476 | ||
2477 | else if (complete_rewrite) { | |
710158e3 JH |
2478 | diff_populate_filespec(one, 0); |
2479 | diff_populate_filespec(two, 0); | |
2480 | data->deleted = count_lines(one->data, one->size); | |
2481 | data->added = count_lines(two->data, two->size); | |
710158e3 | 2482 | } |
6973dcae | 2483 | |
352ca4e1 | 2484 | else if (!same_contents) { |
6973dcae JH |
2485 | /* Crazy xdl interfaces.. */ |
2486 | xpparam_t xpp; | |
2487 | xdemitconf_t xecfg; | |
6973dcae | 2488 | |
ded0abc7 JK |
2489 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) |
2490 | die("unable to read files to diff"); | |
2491 | ||
9ccd0a88 | 2492 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2493 | memset(&xecfg, 0, sizeof(xecfg)); |
582aa00b | 2494 | xpp.flags = o->xdl_opts; |
f01cae91 JH |
2495 | xecfg.ctxlen = o->context; |
2496 | xecfg.interhunkctxlen = o->interhunkcontext; | |
8a3f524b | 2497 | xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat, |
dfea7900 | 2498 | &xpp, &xecfg); |
6973dcae | 2499 | } |
fc3abdf5 | 2500 | |
fc3abdf5 JH |
2501 | diff_free_filespec_data(one); |
2502 | diff_free_filespec_data(two); | |
6973dcae JH |
2503 | } |
2504 | ||
88246898 | 2505 | static void builtin_checkdiff(const char *name_a, const char *name_b, |
cd676a51 | 2506 | const char *attr_path, |
5ff10dd6 JH |
2507 | struct diff_filespec *one, |
2508 | struct diff_filespec *two, | |
2509 | struct diff_options *o) | |
88246898 JS |
2510 | { |
2511 | mmfile_t mf1, mf2; | |
2512 | struct checkdiff_t data; | |
2513 | ||
2514 | if (!two) | |
2515 | return; | |
2516 | ||
2517 | memset(&data, 0, sizeof(data)); | |
88246898 JS |
2518 | data.filename = name_b ? name_b : name_a; |
2519 | data.lineno = 0; | |
1ba111d1 | 2520 | data.o = o; |
cd676a51 | 2521 | data.ws_rule = whitespace_rule(attr_path); |
a757c646 | 2522 | data.conflict_marker_size = ll_merge_marker_size(attr_path); |
88246898 JS |
2523 | |
2524 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
2525 | die("unable to read files to diff"); | |
2526 | ||
5ff10dd6 JH |
2527 | /* |
2528 | * All the other codepaths check both sides, but not checking | |
2529 | * the "old" side here is deliberate. We are checking the newly | |
2530 | * introduced changes, and as long as the "new" side is text, we | |
2531 | * can and should check what it introduces. | |
2532 | */ | |
29a3eefd | 2533 | if (diff_filespec_is_binary(two)) |
fc3abdf5 | 2534 | goto free_and_return; |
88246898 JS |
2535 | else { |
2536 | /* Crazy xdl interfaces.. */ | |
2537 | xpparam_t xpp; | |
2538 | xdemitconf_t xecfg; | |
88246898 | 2539 | |
9ccd0a88 | 2540 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2541 | memset(&xecfg, 0, sizeof(xecfg)); |
c35539eb | 2542 | xecfg.ctxlen = 1; /* at least one context line */ |
582aa00b | 2543 | xpp.flags = 0; |
8a3f524b | 2544 | xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data, |
dfea7900 | 2545 | &xpp, &xecfg); |
877f23cc | 2546 | |
467babf8 | 2547 | if (data.ws_rule & WS_BLANK_AT_EOF) { |
d68fe26f JH |
2548 | struct emit_callback ecbdata; |
2549 | int blank_at_eof; | |
2550 | ||
2551 | ecbdata.ws_rule = data.ws_rule; | |
2552 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
8837d335 | 2553 | blank_at_eof = ecbdata.blank_at_eof_in_postimage; |
d68fe26f | 2554 | |
467babf8 JH |
2555 | if (blank_at_eof) { |
2556 | static char *err; | |
2557 | if (!err) | |
2558 | err = whitespace_error_string(WS_BLANK_AT_EOF); | |
2559 | fprintf(o->file, "%s:%d: %s.\n", | |
2560 | data.filename, blank_at_eof, err); | |
2561 | data.status = 1; /* report errors */ | |
2562 | } | |
877f23cc | 2563 | } |
88246898 | 2564 | } |
fc3abdf5 JH |
2565 | free_and_return: |
2566 | diff_free_filespec_data(one); | |
2567 | diff_free_filespec_data(two); | |
62c64895 WC |
2568 | if (data.status) |
2569 | DIFF_OPT_SET(o, CHECK_FAILED); | |
88246898 JS |
2570 | } |
2571 | ||
6973dcae JH |
2572 | struct diff_filespec *alloc_filespec(const char *path) |
2573 | { | |
2574 | int namelen = strlen(path); | |
2575 | struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1); | |
2576 | ||
2577 | memset(spec, 0, sizeof(*spec)); | |
2578 | spec->path = (char *)(spec + 1); | |
2579 | memcpy(spec->path, path, namelen+1); | |
9fb88419 | 2580 | spec->count = 1; |
122aa6f9 | 2581 | spec->is_binary = -1; |
6973dcae JH |
2582 | return spec; |
2583 | } | |
2584 | ||
9fb88419 LT |
2585 | void free_filespec(struct diff_filespec *spec) |
2586 | { | |
2587 | if (!--spec->count) { | |
2588 | diff_free_filespec_data(spec); | |
2589 | free(spec); | |
2590 | } | |
2591 | } | |
2592 | ||
6973dcae | 2593 | void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1, |
e5450100 | 2594 | int sha1_valid, unsigned short mode) |
6973dcae JH |
2595 | { |
2596 | if (mode) { | |
2597 | spec->mode = canon_mode(mode); | |
e702496e | 2598 | hashcpy(spec->sha1, sha1); |
e5450100 | 2599 | spec->sha1_valid = sha1_valid; |
6973dcae JH |
2600 | } |
2601 | } | |
2602 | ||
2603 | /* | |
5adf317b | 2604 | * Given a name and sha1 pair, if the index tells us the file in |
6973dcae JH |
2605 | * the work tree has that object contents, return true, so that |
2606 | * prepare_temp_file() does not have to inflate and extract. | |
2607 | */ | |
1510fea7 | 2608 | static int reuse_worktree_file(const char *name, const unsigned char *sha1, int want_file) |
6973dcae JH |
2609 | { |
2610 | struct cache_entry *ce; | |
2611 | struct stat st; | |
2612 | int pos, len; | |
2613 | ||
150115ad JH |
2614 | /* |
2615 | * We do not read the cache ourselves here, because the | |
6973dcae JH |
2616 | * benchmark with my previous version that always reads cache |
2617 | * shows that it makes things worse for diff-tree comparing | |
2618 | * two linux-2.6 kernel trees in an already checked out work | |
2619 | * tree. This is because most diff-tree comparisons deal with | |
2620 | * only a small number of files, while reading the cache is | |
2621 | * expensive for a large project, and its cost outweighs the | |
2622 | * savings we get by not inflating the object to a temporary | |
2623 | * file. Practically, this code only helps when we are used | |
2624 | * by diff-cache --cached, which does read the cache before | |
2625 | * calling us. | |
2626 | */ | |
2627 | if (!active_cache) | |
2628 | return 0; | |
2629 | ||
1510fea7 SP |
2630 | /* We want to avoid the working directory if our caller |
2631 | * doesn't need the data in a normal file, this system | |
2632 | * is rather slow with its stat/open/mmap/close syscalls, | |
2633 | * and the object is contained in a pack file. The pack | |
2634 | * is probably already open and will be faster to obtain | |
2635 | * the data through than the working directory. Loose | |
2636 | * objects however would tend to be slower as they need | |
2637 | * to be individually opened and inflated. | |
2638 | */ | |
cd673c1f | 2639 | if (!FAST_WORKING_DIRECTORY && !want_file && has_sha1_pack(sha1)) |
1510fea7 SP |
2640 | return 0; |
2641 | ||
6973dcae JH |
2642 | len = strlen(name); |
2643 | pos = cache_name_pos(name, len); | |
2644 | if (pos < 0) | |
2645 | return 0; | |
2646 | ce = active_cache[pos]; | |
eadb5831 JH |
2647 | |
2648 | /* | |
2649 | * This is not the sha1 we are looking for, or | |
2650 | * unreusable because it is not a regular file. | |
2651 | */ | |
2652 | if (hashcmp(sha1, ce->sha1) || !S_ISREG(ce->ce_mode)) | |
6973dcae | 2653 | return 0; |
eadb5831 | 2654 | |
150115ad JH |
2655 | /* |
2656 | * If ce is marked as "assume unchanged", there is no | |
2657 | * guarantee that work tree matches what we are looking for. | |
2658 | */ | |
b4d1690d | 2659 | if ((ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) |
150115ad JH |
2660 | return 0; |
2661 | ||
eadb5831 JH |
2662 | /* |
2663 | * If ce matches the file in the work tree, we can reuse it. | |
6973dcae | 2664 | */ |
eadb5831 JH |
2665 | if (ce_uptodate(ce) || |
2666 | (!lstat(name, &st) && !ce_match_stat(ce, &st, 0))) | |
2667 | return 1; | |
2668 | ||
2669 | return 0; | |
6973dcae JH |
2670 | } |
2671 | ||
04786756 LT |
2672 | static int diff_populate_gitlink(struct diff_filespec *s, int size_only) |
2673 | { | |
2674 | int len; | |
8e08b419 JH |
2675 | char *data = xmalloc(100), *dirty = ""; |
2676 | ||
2677 | /* Are we looking at the work tree? */ | |
85adbf2f | 2678 | if (s->dirty_submodule) |
8e08b419 JH |
2679 | dirty = "-dirty"; |
2680 | ||
04786756 | 2681 | len = snprintf(data, 100, |
8e08b419 | 2682 | "Subproject commit %s%s\n", sha1_to_hex(s->sha1), dirty); |
04786756 LT |
2683 | s->data = data; |
2684 | s->size = len; | |
2685 | s->should_free = 1; | |
2686 | if (size_only) { | |
2687 | s->data = NULL; | |
2688 | free(data); | |
2689 | } | |
2690 | return 0; | |
2691 | } | |
2692 | ||
6973dcae JH |
2693 | /* |
2694 | * While doing rename detection and pickaxe operation, we may need to | |
2695 | * grab the data for the blob (or file) for our own in-core comparison. | |
2696 | * diff_filespec has data and size fields for this purpose. | |
2697 | */ | |
2698 | int diff_populate_filespec(struct diff_filespec *s, int size_only) | |
2699 | { | |
2700 | int err = 0; | |
2701 | if (!DIFF_FILE_VALID(s)) | |
2702 | die("internal error: asking to populate invalid file."); | |
2703 | if (S_ISDIR(s->mode)) | |
2704 | return -1; | |
2705 | ||
6973dcae | 2706 | if (s->data) |
fc3abdf5 | 2707 | return 0; |
04786756 | 2708 | |
6e0b8ed6 JH |
2709 | if (size_only && 0 < s->size) |
2710 | return 0; | |
2711 | ||
302b9282 | 2712 | if (S_ISGITLINK(s->mode)) |
04786756 LT |
2713 | return diff_populate_gitlink(s, size_only); |
2714 | ||
6973dcae | 2715 | if (!s->sha1_valid || |
1510fea7 | 2716 | reuse_worktree_file(s->path, s->sha1, 0)) { |
f285a2d7 | 2717 | struct strbuf buf = STRBUF_INIT; |
6973dcae JH |
2718 | struct stat st; |
2719 | int fd; | |
6c510bee | 2720 | |
6973dcae JH |
2721 | if (lstat(s->path, &st) < 0) { |
2722 | if (errno == ENOENT) { | |
2723 | err_empty: | |
2724 | err = -1; | |
2725 | empty: | |
d2543b8e | 2726 | s->data = (char *)""; |
6973dcae JH |
2727 | s->size = 0; |
2728 | return err; | |
2729 | } | |
2730 | } | |
dc49cd76 | 2731 | s->size = xsize_t(st.st_size); |
6973dcae JH |
2732 | if (!s->size) |
2733 | goto empty; | |
6973dcae | 2734 | if (S_ISLNK(st.st_mode)) { |
cf219d8c LT |
2735 | struct strbuf sb = STRBUF_INIT; |
2736 | ||
2737 | if (strbuf_readlink(&sb, s->path, s->size)) | |
6973dcae | 2738 | goto err_empty; |
0956a6db RS |
2739 | s->size = sb.len; |
2740 | s->data = strbuf_detach(&sb, NULL); | |
cf219d8c | 2741 | s->should_free = 1; |
6973dcae JH |
2742 | return 0; |
2743 | } | |
cf219d8c LT |
2744 | if (size_only) |
2745 | return 0; | |
6973dcae JH |
2746 | fd = open(s->path, O_RDONLY); |
2747 | if (fd < 0) | |
2748 | goto err_empty; | |
c4712e45 | 2749 | s->data = xmmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0); |
6973dcae | 2750 | close(fd); |
6973dcae | 2751 | s->should_munmap = 1; |
6c510bee LT |
2752 | |
2753 | /* | |
2754 | * Convert from working tree format to canonical git format | |
2755 | */ | |
21e5ad50 | 2756 | if (convert_to_git(s->path, s->data, s->size, &buf, safe_crlf)) { |
c32f749f | 2757 | size_t size = 0; |
6c510bee LT |
2758 | munmap(s->data, s->size); |
2759 | s->should_munmap = 0; | |
c32f749f RS |
2760 | s->data = strbuf_detach(&buf, &size); |
2761 | s->size = size; | |
6c510bee LT |
2762 | s->should_free = 1; |
2763 | } | |
6973dcae JH |
2764 | } |
2765 | else { | |
21666f1a | 2766 | enum object_type type; |
c50c4316 | 2767 | if (size_only) { |
21666f1a | 2768 | type = sha1_object_info(s->sha1, &s->size); |
c50c4316 NP |
2769 | if (type < 0) |
2770 | die("unable to read %s", sha1_to_hex(s->sha1)); | |
2771 | } else { | |
21666f1a | 2772 | s->data = read_sha1_file(s->sha1, &type, &s->size); |
c50c4316 NP |
2773 | if (!s->data) |
2774 | die("unable to read %s", sha1_to_hex(s->sha1)); | |
6973dcae JH |
2775 | s->should_free = 1; |
2776 | } | |
2777 | } | |
2778 | return 0; | |
2779 | } | |
2780 | ||
8ae92e63 | 2781 | void diff_free_filespec_blob(struct diff_filespec *s) |
6973dcae JH |
2782 | { |
2783 | if (s->should_free) | |
2784 | free(s->data); | |
2785 | else if (s->should_munmap) | |
2786 | munmap(s->data, s->size); | |
fc3abdf5 JH |
2787 | |
2788 | if (s->should_free || s->should_munmap) { | |
2789 | s->should_free = s->should_munmap = 0; | |
2790 | s->data = NULL; | |
2791 | } | |
eede7b7d JK |
2792 | } |
2793 | ||
2794 | void diff_free_filespec_data(struct diff_filespec *s) | |
2795 | { | |
8ae92e63 | 2796 | diff_free_filespec_blob(s); |
6973dcae JH |
2797 | free(s->cnt_data); |
2798 | s->cnt_data = NULL; | |
2799 | } | |
2800 | ||
4e218f54 | 2801 | static void prep_temp_blob(const char *path, struct diff_tempfile *temp, |
6973dcae JH |
2802 | void *blob, |
2803 | unsigned long size, | |
2804 | const unsigned char *sha1, | |
2805 | int mode) | |
2806 | { | |
2807 | int fd; | |
4e218f54 | 2808 | struct strbuf buf = STRBUF_INIT; |
003b33a8 DA |
2809 | struct strbuf template = STRBUF_INIT; |
2810 | char *path_dup = xstrdup(path); | |
2811 | const char *base = basename(path_dup); | |
6973dcae | 2812 | |
003b33a8 DA |
2813 | /* Generate "XXXXXX_basename.ext" */ |
2814 | strbuf_addstr(&template, "XXXXXX_"); | |
2815 | strbuf_addstr(&template, base); | |
2816 | ||
2817 | fd = git_mkstemps(temp->tmp_path, PATH_MAX, template.buf, | |
2818 | strlen(base) + 1); | |
6973dcae | 2819 | if (fd < 0) |
d824cbba | 2820 | die_errno("unable to create temp-file"); |
4e218f54 JS |
2821 | if (convert_to_working_tree(path, |
2822 | (const char *)blob, (size_t)size, &buf)) { | |
2823 | blob = buf.buf; | |
2824 | size = buf.len; | |
2825 | } | |
93822c22 | 2826 | if (write_in_full(fd, blob, size) != size) |
0721c314 | 2827 | die_errno("unable to write temp-file"); |
6973dcae JH |
2828 | close(fd); |
2829 | temp->name = temp->tmp_path; | |
2830 | strcpy(temp->hex, sha1_to_hex(sha1)); | |
2831 | temp->hex[40] = 0; | |
2832 | sprintf(temp->mode, "%06o", mode); | |
4e218f54 | 2833 | strbuf_release(&buf); |
003b33a8 DA |
2834 | strbuf_release(&template); |
2835 | free(path_dup); | |
6973dcae JH |
2836 | } |
2837 | ||
479b0ae8 JK |
2838 | static struct diff_tempfile *prepare_temp_file(const char *name, |
2839 | struct diff_filespec *one) | |
6973dcae | 2840 | { |
479b0ae8 JK |
2841 | struct diff_tempfile *temp = claim_diff_tempfile(); |
2842 | ||
6973dcae JH |
2843 | if (!DIFF_FILE_VALID(one)) { |
2844 | not_a_valid_file: | |
2845 | /* A '-' entry produces this for file-2, and | |
2846 | * a '+' entry produces this for file-1. | |
2847 | */ | |
2848 | temp->name = "/dev/null"; | |
2849 | strcpy(temp->hex, "."); | |
2850 | strcpy(temp->mode, "."); | |
479b0ae8 JK |
2851 | return temp; |
2852 | } | |
2853 | ||
2854 | if (!remove_tempfile_installed) { | |
2855 | atexit(remove_tempfile); | |
57b235a4 | 2856 | sigchain_push_common(remove_tempfile_on_signal); |
479b0ae8 | 2857 | remove_tempfile_installed = 1; |
6973dcae JH |
2858 | } |
2859 | ||
2860 | if (!one->sha1_valid || | |
1510fea7 | 2861 | reuse_worktree_file(name, one->sha1, 1)) { |
6973dcae JH |
2862 | struct stat st; |
2863 | if (lstat(name, &st) < 0) { | |
2864 | if (errno == ENOENT) | |
2865 | goto not_a_valid_file; | |
d824cbba | 2866 | die_errno("stat(%s)", name); |
6973dcae JH |
2867 | } |
2868 | if (S_ISLNK(st.st_mode)) { | |
3cd7388d JK |
2869 | struct strbuf sb = STRBUF_INIT; |
2870 | if (strbuf_readlink(&sb, name, st.st_size) < 0) | |
0721c314 | 2871 | die_errno("readlink(%s)", name); |
3cd7388d | 2872 | prep_temp_blob(name, temp, sb.buf, sb.len, |
6973dcae JH |
2873 | (one->sha1_valid ? |
2874 | one->sha1 : null_sha1), | |
2875 | (one->sha1_valid ? | |
2876 | one->mode : S_IFLNK)); | |
3cd7388d | 2877 | strbuf_release(&sb); |
6973dcae JH |
2878 | } |
2879 | else { | |
2880 | /* we can borrow from the file in the work tree */ | |
2881 | temp->name = name; | |
2882 | if (!one->sha1_valid) | |
2883 | strcpy(temp->hex, sha1_to_hex(null_sha1)); | |
2884 | else | |
2885 | strcpy(temp->hex, sha1_to_hex(one->sha1)); | |
2886 | /* Even though we may sometimes borrow the | |
2887 | * contents from the work tree, we always want | |
2888 | * one->mode. mode is trustworthy even when | |
2889 | * !(one->sha1_valid), as long as | |
2890 | * DIFF_FILE_VALID(one). | |
2891 | */ | |
2892 | sprintf(temp->mode, "%06o", one->mode); | |
2893 | } | |
479b0ae8 | 2894 | return temp; |
6973dcae JH |
2895 | } |
2896 | else { | |
2897 | if (diff_populate_filespec(one, 0)) | |
2898 | die("cannot read data blob for %s", one->path); | |
4e218f54 | 2899 | prep_temp_blob(name, temp, one->data, one->size, |
6973dcae JH |
2900 | one->sha1, one->mode); |
2901 | } | |
479b0ae8 | 2902 | return temp; |
6973dcae JH |
2903 | } |
2904 | ||
6973dcae JH |
2905 | /* An external diff command takes: |
2906 | * | |
2907 | * diff-cmd name infile1 infile1-sha1 infile1-mode \ | |
2908 | * infile2 infile2-sha1 infile2-mode [ rename-to ] | |
2909 | * | |
2910 | */ | |
2911 | static void run_external_diff(const char *pgm, | |
2912 | const char *name, | |
2913 | const char *other, | |
2914 | struct diff_filespec *one, | |
2915 | struct diff_filespec *two, | |
2916 | const char *xfrm_msg, | |
2917 | int complete_rewrite) | |
2918 | { | |
2919 | const char *spawn_arg[10]; | |
6973dcae | 2920 | int retval; |
6973dcae JH |
2921 | const char **arg = &spawn_arg[0]; |
2922 | ||
6973dcae | 2923 | if (one && two) { |
479b0ae8 JK |
2924 | struct diff_tempfile *temp_one, *temp_two; |
2925 | const char *othername = (other ? other : name); | |
2926 | temp_one = prepare_temp_file(name, one); | |
2927 | temp_two = prepare_temp_file(othername, two); | |
6973dcae JH |
2928 | *arg++ = pgm; |
2929 | *arg++ = name; | |
479b0ae8 JK |
2930 | *arg++ = temp_one->name; |
2931 | *arg++ = temp_one->hex; | |
2932 | *arg++ = temp_one->mode; | |
2933 | *arg++ = temp_two->name; | |
2934 | *arg++ = temp_two->hex; | |
2935 | *arg++ = temp_two->mode; | |
6973dcae JH |
2936 | if (other) { |
2937 | *arg++ = other; | |
2938 | *arg++ = xfrm_msg; | |
2939 | } | |
2940 | } else { | |
2941 | *arg++ = pgm; | |
2942 | *arg++ = name; | |
2943 | } | |
2944 | *arg = NULL; | |
d5535ec7 | 2945 | fflush(NULL); |
7ed7fac4 | 2946 | retval = run_command_v_opt(spawn_arg, RUN_USING_SHELL); |
6973dcae JH |
2947 | remove_tempfile(); |
2948 | if (retval) { | |
2949 | fprintf(stderr, "external diff died, stopping at %s.\n", name); | |
2950 | exit(1); | |
2951 | } | |
2952 | } | |
2953 | ||
b67b9612 JH |
2954 | static int similarity_index(struct diff_filepair *p) |
2955 | { | |
2956 | return p->score * 100 / MAX_SCORE; | |
2957 | } | |
2958 | ||
2959 | static void fill_metainfo(struct strbuf *msg, | |
2960 | const char *name, | |
2961 | const char *other, | |
2962 | struct diff_filespec *one, | |
2963 | struct diff_filespec *two, | |
2964 | struct diff_options *o, | |
37466447 | 2965 | struct diff_filepair *p, |
5977744d | 2966 | int *must_show_header, |
37466447 | 2967 | int use_color) |
b67b9612 | 2968 | { |
37466447 BW |
2969 | const char *set = diff_get_color(use_color, DIFF_METAINFO); |
2970 | const char *reset = diff_get_color(use_color, DIFF_RESET); | |
7be57610 BY |
2971 | struct strbuf *msgbuf; |
2972 | char *line_prefix = ""; | |
2973 | ||
296c6bb2 | 2974 | *must_show_header = 1; |
7be57610 BY |
2975 | if (o->output_prefix) { |
2976 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
2977 | line_prefix = msgbuf->buf; | |
2978 | } | |
b67b9612 JH |
2979 | strbuf_init(msg, PATH_MAX * 2 + 300); |
2980 | switch (p->status) { | |
2981 | case DIFF_STATUS_COPIED: | |
98ad90fb JH |
2982 | strbuf_addf(msg, "%s%ssimilarity index %d%%", |
2983 | line_prefix, set, similarity_index(p)); | |
2984 | strbuf_addf(msg, "%s\n%s%scopy from ", | |
2985 | reset, line_prefix, set); | |
b67b9612 | 2986 | quote_c_style(name, msg, NULL, 0); |
98ad90fb | 2987 | strbuf_addf(msg, "%s\n%s%scopy to ", reset, line_prefix, set); |
b67b9612 | 2988 | quote_c_style(other, msg, NULL, 0); |
37466447 | 2989 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 JH |
2990 | break; |
2991 | case DIFF_STATUS_RENAMED: | |
98ad90fb JH |
2992 | strbuf_addf(msg, "%s%ssimilarity index %d%%", |
2993 | line_prefix, set, similarity_index(p)); | |
2994 | strbuf_addf(msg, "%s\n%s%srename from ", | |
2995 | reset, line_prefix, set); | |
b67b9612 | 2996 | quote_c_style(name, msg, NULL, 0); |
98ad90fb JH |
2997 | strbuf_addf(msg, "%s\n%s%srename to ", |
2998 | reset, line_prefix, set); | |
b67b9612 | 2999 | quote_c_style(other, msg, NULL, 0); |
37466447 | 3000 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 JH |
3001 | break; |
3002 | case DIFF_STATUS_MODIFIED: | |
3003 | if (p->score) { | |
98ad90fb JH |
3004 | strbuf_addf(msg, "%s%sdissimilarity index %d%%%s\n", |
3005 | line_prefix, | |
37466447 | 3006 | set, similarity_index(p), reset); |
b67b9612 JH |
3007 | break; |
3008 | } | |
3009 | /* fallthru */ | |
3010 | default: | |
296c6bb2 | 3011 | *must_show_header = 0; |
b67b9612 JH |
3012 | } |
3013 | if (one && two && hashcmp(one->sha1, two->sha1)) { | |
3014 | int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV; | |
3015 | ||
3016 | if (DIFF_OPT_TST(o, BINARY)) { | |
3017 | mmfile_t mf; | |
3018 | if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) || | |
3019 | (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two))) | |
3020 | abbrev = 40; | |
3021 | } | |
e13f38a3 | 3022 | strbuf_addf(msg, "%s%sindex %s..", line_prefix, set, |
3e5a188f JH |
3023 | find_unique_abbrev(one->sha1, abbrev)); |
3024 | strbuf_addstr(msg, find_unique_abbrev(two->sha1, abbrev)); | |
b67b9612 JH |
3025 | if (one->mode == two->mode) |
3026 | strbuf_addf(msg, " %06o", one->mode); | |
37466447 | 3027 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 | 3028 | } |
b67b9612 JH |
3029 | } |
3030 | ||
6973dcae JH |
3031 | static void run_diff_cmd(const char *pgm, |
3032 | const char *name, | |
3033 | const char *other, | |
cd676a51 | 3034 | const char *attr_path, |
6973dcae JH |
3035 | struct diff_filespec *one, |
3036 | struct diff_filespec *two, | |
b67b9612 | 3037 | struct strbuf *msg, |
051308f6 | 3038 | struct diff_options *o, |
b67b9612 | 3039 | struct diff_filepair *p) |
6973dcae | 3040 | { |
b67b9612 JH |
3041 | const char *xfrm_msg = NULL; |
3042 | int complete_rewrite = (p->status == DIFF_STATUS_MODIFIED) && p->score; | |
296c6bb2 | 3043 | int must_show_header = 0; |
b67b9612 | 3044 | |
bd8c1a9b JH |
3045 | |
3046 | if (DIFF_OPT_TST(o, ALLOW_EXTERNAL)) { | |
be58e70d JK |
3047 | struct userdiff_driver *drv = userdiff_find_by_path(attr_path); |
3048 | if (drv && drv->external) | |
3049 | pgm = drv->external; | |
f1af60bd JH |
3050 | } |
3051 | ||
37466447 BW |
3052 | if (msg) { |
3053 | /* | |
3054 | * don't use colors when the header is intended for an | |
3055 | * external diff driver | |
3056 | */ | |
3057 | fill_metainfo(msg, name, other, one, two, o, p, | |
5977744d | 3058 | &must_show_header, |
daa0c3d9 | 3059 | want_color(o->use_color) && !pgm); |
37466447 BW |
3060 | xfrm_msg = msg->len ? msg->buf : NULL; |
3061 | } | |
3062 | ||
6973dcae JH |
3063 | if (pgm) { |
3064 | run_external_diff(pgm, name, other, one, two, xfrm_msg, | |
3065 | complete_rewrite); | |
3066 | return; | |
3067 | } | |
3068 | if (one && two) | |
3069 | builtin_diff(name, other ? other : name, | |
296c6bb2 CC |
3070 | one, two, xfrm_msg, must_show_header, |
3071 | o, complete_rewrite); | |
6973dcae | 3072 | else |
c0c77734 | 3073 | fprintf(o->file, "* Unmerged path %s\n", name); |
6973dcae JH |
3074 | } |
3075 | ||
3076 | static void diff_fill_sha1_info(struct diff_filespec *one) | |
3077 | { | |
3078 | if (DIFF_FILE_VALID(one)) { | |
3079 | if (!one->sha1_valid) { | |
3080 | struct stat st; | |
4682d852 | 3081 | if (one->is_stdin) { |
5332b2af JS |
3082 | hashcpy(one->sha1, null_sha1); |
3083 | return; | |
3084 | } | |
6973dcae | 3085 | if (lstat(one->path, &st) < 0) |
0721c314 | 3086 | die_errno("stat '%s'", one->path); |
6973dcae | 3087 | if (index_path(one->sha1, one->path, &st, 0)) |
d7530708 | 3088 | die("cannot hash %s", one->path); |
6973dcae JH |
3089 | } |
3090 | } | |
3091 | else | |
e702496e | 3092 | hashclr(one->sha1); |
6973dcae JH |
3093 | } |
3094 | ||
cd676a51 JH |
3095 | static void strip_prefix(int prefix_length, const char **namep, const char **otherp) |
3096 | { | |
3097 | /* Strip the prefix but do not molest /dev/null and absolute paths */ | |
d8faea9d | 3098 | if (*namep && **namep != '/') { |
cd676a51 | 3099 | *namep += prefix_length; |
d8faea9d JN |
3100 | if (**namep == '/') |
3101 | ++*namep; | |
3102 | } | |
3103 | if (*otherp && **otherp != '/') { | |
cd676a51 | 3104 | *otherp += prefix_length; |
d8faea9d JN |
3105 | if (**otherp == '/') |
3106 | ++*otherp; | |
3107 | } | |
cd676a51 JH |
3108 | } |
3109 | ||
6973dcae JH |
3110 | static void run_diff(struct diff_filepair *p, struct diff_options *o) |
3111 | { | |
3112 | const char *pgm = external_diff(); | |
663af342 | 3113 | struct strbuf msg; |
663af342 PH |
3114 | struct diff_filespec *one = p->one; |
3115 | struct diff_filespec *two = p->two; | |
6973dcae JH |
3116 | const char *name; |
3117 | const char *other; | |
cd676a51 | 3118 | const char *attr_path; |
663af342 | 3119 | |
cd676a51 JH |
3120 | name = p->one->path; |
3121 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
3122 | attr_path = name; | |
3123 | if (o->prefix_length) | |
3124 | strip_prefix(o->prefix_length, &name, &other); | |
6973dcae | 3125 | |
bd8c1a9b JH |
3126 | if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL)) |
3127 | pgm = NULL; | |
3128 | ||
6973dcae | 3129 | if (DIFF_PAIR_UNMERGED(p)) { |
cd676a51 | 3130 | run_diff_cmd(pgm, name, NULL, attr_path, |
b67b9612 | 3131 | NULL, NULL, NULL, o, p); |
6973dcae JH |
3132 | return; |
3133 | } | |
3134 | ||
6973dcae JH |
3135 | diff_fill_sha1_info(one); |
3136 | diff_fill_sha1_info(two); | |
3137 | ||
6973dcae JH |
3138 | if (!pgm && |
3139 | DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) && | |
3140 | (S_IFMT & one->mode) != (S_IFMT & two->mode)) { | |
b67b9612 JH |
3141 | /* |
3142 | * a filepair that changes between file and symlink | |
6973dcae JH |
3143 | * needs to be split into deletion and creation. |
3144 | */ | |
3145 | struct diff_filespec *null = alloc_filespec(two->path); | |
cd676a51 | 3146 | run_diff_cmd(NULL, name, other, attr_path, |
b67b9612 | 3147 | one, null, &msg, o, p); |
6973dcae | 3148 | free(null); |
b67b9612 JH |
3149 | strbuf_release(&msg); |
3150 | ||
6973dcae | 3151 | null = alloc_filespec(one->path); |
cd676a51 | 3152 | run_diff_cmd(NULL, name, other, attr_path, |
b67b9612 | 3153 | null, two, &msg, o, p); |
6973dcae JH |
3154 | free(null); |
3155 | } | |
3156 | else | |
cd676a51 | 3157 | run_diff_cmd(pgm, name, other, attr_path, |
b67b9612 | 3158 | one, two, &msg, o, p); |
6973dcae | 3159 | |
663af342 | 3160 | strbuf_release(&msg); |
6973dcae JH |
3161 | } |
3162 | ||
3163 | static void run_diffstat(struct diff_filepair *p, struct diff_options *o, | |
3164 | struct diffstat_t *diffstat) | |
3165 | { | |
3166 | const char *name; | |
3167 | const char *other; | |
3168 | ||
3169 | if (DIFF_PAIR_UNMERGED(p)) { | |
3170 | /* unmerged */ | |
74faaa16 | 3171 | builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, p); |
6973dcae JH |
3172 | return; |
3173 | } | |
3174 | ||
3175 | name = p->one->path; | |
3176 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
3177 | ||
cd676a51 JH |
3178 | if (o->prefix_length) |
3179 | strip_prefix(o->prefix_length, &name, &other); | |
3180 | ||
6973dcae JH |
3181 | diff_fill_sha1_info(p->one); |
3182 | diff_fill_sha1_info(p->two); | |
3183 | ||
74faaa16 | 3184 | builtin_diffstat(name, other, p->one, p->two, diffstat, o, p); |
6973dcae JH |
3185 | } |
3186 | ||
88246898 JS |
3187 | static void run_checkdiff(struct diff_filepair *p, struct diff_options *o) |
3188 | { | |
3189 | const char *name; | |
3190 | const char *other; | |
cd676a51 | 3191 | const char *attr_path; |
88246898 JS |
3192 | |
3193 | if (DIFF_PAIR_UNMERGED(p)) { | |
3194 | /* unmerged */ | |
3195 | return; | |
3196 | } | |
3197 | ||
3198 | name = p->one->path; | |
3199 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
cd676a51 JH |
3200 | attr_path = other ? other : name; |
3201 | ||
3202 | if (o->prefix_length) | |
3203 | strip_prefix(o->prefix_length, &name, &other); | |
88246898 JS |
3204 | |
3205 | diff_fill_sha1_info(p->one); | |
3206 | diff_fill_sha1_info(p->two); | |
3207 | ||
cd676a51 | 3208 | builtin_checkdiff(name, other, attr_path, p->one, p->two, o); |
88246898 JS |
3209 | } |
3210 | ||
6973dcae JH |
3211 | void diff_setup(struct diff_options *options) |
3212 | { | |
be4f2b40 | 3213 | memcpy(options, &default_diff_options, sizeof(*options)); |
c0c77734 DB |
3214 | |
3215 | options->file = stdout; | |
3216 | ||
6973dcae JH |
3217 | options->line_termination = '\n'; |
3218 | options->break_opt = -1; | |
3219 | options->rename_limit = -1; | |
712d2c7d | 3220 | options->dirstat_permille = diff_dirstat_permille_default; |
6468a4e5 | 3221 | options->context = diff_context_default; |
90d43b07 | 3222 | DIFF_OPT_SET(options, RENAME_EMPTY); |
6973dcae JH |
3223 | |
3224 | options->change = diff_change; | |
3225 | options->add_remove = diff_addremove; | |
f1c96261 | 3226 | options->use_color = diff_use_color_default; |
b68ea12e | 3227 | options->detect_rename = diff_detect_rename_default; |
eab9a40b | 3228 | |
f89504dd EC |
3229 | if (diff_no_prefix) { |
3230 | options->a_prefix = options->b_prefix = ""; | |
3231 | } else if (!diff_mnemonic_prefix) { | |
a5a818ee JH |
3232 | options->a_prefix = "a/"; |
3233 | options->b_prefix = "b/"; | |
3234 | } | |
6973dcae JH |
3235 | } |
3236 | ||
28452655 | 3237 | void diff_setup_done(struct diff_options *options) |
6973dcae | 3238 | { |
d7de00f7 TH |
3239 | int count = 0; |
3240 | ||
3241 | if (options->output_format & DIFF_FORMAT_NAME) | |
3242 | count++; | |
3243 | if (options->output_format & DIFF_FORMAT_NAME_STATUS) | |
3244 | count++; | |
3245 | if (options->output_format & DIFF_FORMAT_CHECKDIFF) | |
3246 | count++; | |
3247 | if (options->output_format & DIFF_FORMAT_NO_OUTPUT) | |
3248 | count++; | |
3249 | if (count > 1) | |
3250 | die("--name-only, --name-status, --check and -s are mutually exclusive"); | |
3251 | ||
f245194f JH |
3252 | /* |
3253 | * Most of the time we can say "there are changes" | |
3254 | * only by checking if there are changed paths, but | |
3255 | * --ignore-whitespace* options force us to look | |
97bf2a08 | 3256 | * inside contents. |
f245194f JH |
3257 | */ |
3258 | ||
3259 | if (DIFF_XDL_TST(options, IGNORE_WHITESPACE) || | |
3260 | DIFF_XDL_TST(options, IGNORE_WHITESPACE_CHANGE) || | |
3261 | DIFF_XDL_TST(options, IGNORE_WHITESPACE_AT_EOL)) | |
3262 | DIFF_OPT_SET(options, DIFF_FROM_CONTENTS); | |
3263 | else | |
3264 | DIFF_OPT_CLR(options, DIFF_FROM_CONTENTS); | |
3265 | ||
8f67f8ae | 3266 | if (DIFF_OPT_TST(options, FIND_COPIES_HARDER)) |
03b9d560 JH |
3267 | options->detect_rename = DIFF_DETECT_COPY; |
3268 | ||
cd676a51 JH |
3269 | if (!DIFF_OPT_TST(options, RELATIVE_NAME)) |
3270 | options->prefix = NULL; | |
3271 | if (options->prefix) | |
3272 | options->prefix_length = strlen(options->prefix); | |
3273 | else | |
3274 | options->prefix_length = 0; | |
3275 | ||
c6744349 TH |
3276 | if (options->output_format & (DIFF_FORMAT_NAME | |
3277 | DIFF_FORMAT_NAME_STATUS | | |
3278 | DIFF_FORMAT_CHECKDIFF | | |
3279 | DIFF_FORMAT_NO_OUTPUT)) | |
3280 | options->output_format &= ~(DIFF_FORMAT_RAW | | |
74e2abe5 | 3281 | DIFF_FORMAT_NUMSTAT | |
c6744349 | 3282 | DIFF_FORMAT_DIFFSTAT | |
ebd124c6 | 3283 | DIFF_FORMAT_SHORTSTAT | |
7df7c019 | 3284 | DIFF_FORMAT_DIRSTAT | |
c6744349 TH |
3285 | DIFF_FORMAT_SUMMARY | |
3286 | DIFF_FORMAT_PATCH); | |
3287 | ||
6973dcae JH |
3288 | /* |
3289 | * These cases always need recursive; we do not drop caller-supplied | |
3290 | * recursive bits for other formats here. | |
3291 | */ | |
c6744349 | 3292 | if (options->output_format & (DIFF_FORMAT_PATCH | |
74e2abe5 | 3293 | DIFF_FORMAT_NUMSTAT | |
c6744349 | 3294 | DIFF_FORMAT_DIFFSTAT | |
ebd124c6 | 3295 | DIFF_FORMAT_SHORTSTAT | |
7df7c019 | 3296 | DIFF_FORMAT_DIRSTAT | |
d7014dc0 | 3297 | DIFF_FORMAT_SUMMARY | |
c6744349 | 3298 | DIFF_FORMAT_CHECKDIFF)) |
8f67f8ae | 3299 | DIFF_OPT_SET(options, RECURSIVE); |
5e363541 | 3300 | /* |
3969cf7d | 3301 | * Also pickaxe would not work very well if you do not say recursive |
5e363541 | 3302 | */ |
3969cf7d | 3303 | if (options->pickaxe) |
8f67f8ae | 3304 | DIFF_OPT_SET(options, RECURSIVE); |
ae6d5c1b JL |
3305 | /* |
3306 | * When patches are generated, submodules diffed against the work tree | |
3307 | * must be checked for dirtiness too so it can be shown in the output | |
3308 | */ | |
3309 | if (options->output_format & DIFF_FORMAT_PATCH) | |
3310 | DIFF_OPT_SET(options, DIRTY_SUBMODULES); | |
5e363541 | 3311 | |
6973dcae JH |
3312 | if (options->detect_rename && options->rename_limit < 0) |
3313 | options->rename_limit = diff_rename_limit_default; | |
3314 | if (options->setup & DIFF_SETUP_USE_CACHE) { | |
3315 | if (!active_cache) | |
3316 | /* read-cache does not die even when it fails | |
3317 | * so it is safe for us to do this here. Also | |
3318 | * it does not smudge active_cache or active_nr | |
3319 | * when it fails, so we do not have to worry about | |
3320 | * cleaning it up ourselves either. | |
3321 | */ | |
3322 | read_cache(); | |
3323 | } | |
6973dcae JH |
3324 | if (options->abbrev <= 0 || 40 < options->abbrev) |
3325 | options->abbrev = 40; /* full */ | |
3326 | ||
68aacb2f JH |
3327 | /* |
3328 | * It does not make sense to show the first hit we happened | |
3329 | * to have found. It does not make sense not to return with | |
3330 | * exit code in such a case either. | |
3331 | */ | |
90b19941 | 3332 | if (DIFF_OPT_TST(options, QUICK)) { |
68aacb2f | 3333 | options->output_format = DIFF_FORMAT_NO_OUTPUT; |
8f67f8ae | 3334 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); |
68aacb2f | 3335 | } |
6973dcae JH |
3336 | } |
3337 | ||
d2543b8e | 3338 | static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val) |
ee1e5412 LT |
3339 | { |
3340 | char c, *eq; | |
3341 | int len; | |
3342 | ||
3343 | if (*arg != '-') | |
3344 | return 0; | |
3345 | c = *++arg; | |
3346 | if (!c) | |
3347 | return 0; | |
3348 | if (c == arg_short) { | |
3349 | c = *++arg; | |
3350 | if (!c) | |
3351 | return 1; | |
3352 | if (val && isdigit(c)) { | |
3353 | char *end; | |
3354 | int n = strtoul(arg, &end, 10); | |
3355 | if (*end) | |
3356 | return 0; | |
3357 | *val = n; | |
3358 | return 1; | |
3359 | } | |
3360 | return 0; | |
3361 | } | |
3362 | if (c != '-') | |
3363 | return 0; | |
3364 | arg++; | |
3365 | eq = strchr(arg, '='); | |
3366 | if (eq) | |
3367 | len = eq - arg; | |
3368 | else | |
3369 | len = strlen(arg); | |
3370 | if (!len || strncmp(arg, arg_long, len)) | |
3371 | return 0; | |
3372 | if (eq) { | |
3373 | int n; | |
3374 | char *end; | |
3375 | if (!isdigit(*++eq)) | |
3376 | return 0; | |
3377 | n = strtoul(eq, &end, 10); | |
3378 | if (*end) | |
3379 | return 0; | |
3380 | *val = n; | |
3381 | } | |
3382 | return 1; | |
3383 | } | |
3384 | ||
16befb8b JH |
3385 | static int diff_scoreopt_parse(const char *opt); |
3386 | ||
dea007fb MM |
3387 | static inline int short_opt(char opt, const char **argv, |
3388 | const char **optarg) | |
3389 | { | |
3390 | const char *arg = argv[0]; | |
3391 | if (arg[0] != '-' || arg[1] != opt) | |
3392 | return 0; | |
3393 | if (arg[2] != '\0') { | |
3394 | *optarg = arg + 2; | |
3395 | return 1; | |
3396 | } | |
3397 | if (!argv[1]) | |
3398 | die("Option '%c' requires a value", opt); | |
3399 | *optarg = argv[1]; | |
3400 | return 2; | |
3401 | } | |
3402 | ||
3403 | int parse_long_opt(const char *opt, const char **argv, | |
3404 | const char **optarg) | |
3405 | { | |
3406 | const char *arg = argv[0]; | |
3407 | if (arg[0] != '-' || arg[1] != '-') | |
3408 | return 0; | |
3409 | arg += strlen("--"); | |
3410 | if (prefixcmp(arg, opt)) | |
3411 | return 0; | |
3412 | arg += strlen(opt); | |
3413 | if (*arg == '=') { /* sticked form: --option=value */ | |
3414 | *optarg = arg + 1; | |
3415 | return 1; | |
3416 | } | |
3417 | if (*arg != '\0') | |
3418 | return 0; | |
3419 | /* separate form: --option value */ | |
3420 | if (!argv[1]) | |
3421 | die("Option '--%s' requires a value", opt); | |
3422 | *optarg = argv[1]; | |
3423 | return 2; | |
3424 | } | |
3425 | ||
4d7f7a4a JN |
3426 | static int stat_opt(struct diff_options *options, const char **av) |
3427 | { | |
3428 | const char *arg = av[0]; | |
3429 | char *end; | |
3430 | int width = options->stat_width; | |
3431 | int name_width = options->stat_name_width; | |
969fe57b | 3432 | int graph_width = options->stat_graph_width; |
808e1db2 | 3433 | int count = options->stat_count; |
1e57208e | 3434 | int argcount = 1; |
4d7f7a4a JN |
3435 | |
3436 | arg += strlen("--stat"); | |
3437 | end = (char *)arg; | |
3438 | ||
3439 | switch (*arg) { | |
3440 | case '-': | |
1e57208e MM |
3441 | if (!prefixcmp(arg, "-width")) { |
3442 | arg += strlen("-width"); | |
3443 | if (*arg == '=') | |
3444 | width = strtoul(arg + 1, &end, 10); | |
3445 | else if (!*arg && !av[1]) | |
3446 | die("Option '--stat-width' requires a value"); | |
3447 | else if (!*arg) { | |
3448 | width = strtoul(av[1], &end, 10); | |
3449 | argcount = 2; | |
3450 | } | |
3451 | } else if (!prefixcmp(arg, "-name-width")) { | |
3452 | arg += strlen("-name-width"); | |
3453 | if (*arg == '=') | |
3454 | name_width = strtoul(arg + 1, &end, 10); | |
3455 | else if (!*arg && !av[1]) | |
3456 | die("Option '--stat-name-width' requires a value"); | |
3457 | else if (!*arg) { | |
3458 | name_width = strtoul(av[1], &end, 10); | |
3459 | argcount = 2; | |
3460 | } | |
969fe57b ZJS |
3461 | } else if (!prefixcmp(arg, "-graph-width")) { |
3462 | arg += strlen("-graph-width"); | |
3463 | if (*arg == '=') | |
3464 | graph_width = strtoul(arg + 1, &end, 10); | |
3465 | else if (!*arg && !av[1]) | |
3466 | die("Option '--stat-graph-width' requires a value"); | |
3467 | else if (!*arg) { | |
3468 | graph_width = strtoul(av[1], &end, 10); | |
3469 | argcount = 2; | |
3470 | } | |
808e1db2 MG |
3471 | } else if (!prefixcmp(arg, "-count")) { |
3472 | arg += strlen("-count"); | |
3473 | if (*arg == '=') | |
3474 | count = strtoul(arg + 1, &end, 10); | |
3475 | else if (!*arg && !av[1]) | |
3476 | die("Option '--stat-count' requires a value"); | |
3477 | else if (!*arg) { | |
3478 | count = strtoul(av[1], &end, 10); | |
3479 | argcount = 2; | |
3480 | } | |
1e57208e | 3481 | } |
4d7f7a4a JN |
3482 | break; |
3483 | case '=': | |
3484 | width = strtoul(arg+1, &end, 10); | |
3485 | if (*end == ',') | |
3486 | name_width = strtoul(end+1, &end, 10); | |
808e1db2 MG |
3487 | if (*end == ',') |
3488 | count = strtoul(end+1, &end, 10); | |
4d7f7a4a JN |
3489 | } |
3490 | ||
3491 | /* Important! This checks all the error cases! */ | |
3492 | if (*end) | |
3493 | return 0; | |
3494 | options->output_format |= DIFF_FORMAT_DIFFSTAT; | |
3495 | options->stat_name_width = name_width; | |
969fe57b | 3496 | options->stat_graph_width = graph_width; |
4d7f7a4a | 3497 | options->stat_width = width; |
808e1db2 | 3498 | options->stat_count = count; |
1e57208e | 3499 | return argcount; |
4d7f7a4a JN |
3500 | } |
3501 | ||
333f3fb0 JH |
3502 | static int parse_dirstat_opt(struct diff_options *options, const char *params) |
3503 | { | |
51670fc8 JH |
3504 | struct strbuf errmsg = STRBUF_INIT; |
3505 | if (parse_dirstat_params(options, params, &errmsg)) | |
7478ac57 | 3506 | die(_("Failed to parse --dirstat/-X option parameter:\n%s"), |
51670fc8 JH |
3507 | errmsg.buf); |
3508 | strbuf_release(&errmsg); | |
333f3fb0 JH |
3509 | /* |
3510 | * The caller knows a dirstat-related option is given from the command | |
3511 | * line; allow it to say "return this_function();" | |
3512 | */ | |
3513 | options->output_format |= DIFF_FORMAT_DIRSTAT; | |
3514 | return 1; | |
3515 | } | |
3516 | ||
c47ef57c RR |
3517 | static int parse_submodule_opt(struct diff_options *options, const char *value) |
3518 | { | |
3519 | if (parse_submodule_params(options, value)) | |
3520 | die(_("Failed to parse --submodule option parameter: '%s'"), | |
3521 | value); | |
3522 | return 1; | |
3523 | } | |
3524 | ||
6973dcae JH |
3525 | int diff_opt_parse(struct diff_options *options, const char **av, int ac) |
3526 | { | |
3527 | const char *arg = av[0]; | |
dea007fb MM |
3528 | const char *optarg; |
3529 | int argcount; | |
d054680c PH |
3530 | |
3531 | /* Output format options */ | |
1c9eecff | 3532 | if (!strcmp(arg, "-p") || !strcmp(arg, "-u") || !strcmp(arg, "--patch")) |
c6744349 | 3533 | options->output_format |= DIFF_FORMAT_PATCH; |
ee1e5412 | 3534 | else if (opt_arg(arg, 'U', "unified", &options->context)) |
c6744349 | 3535 | options->output_format |= DIFF_FORMAT_PATCH; |
a610786f TH |
3536 | else if (!strcmp(arg, "--raw")) |
3537 | options->output_format |= DIFF_FORMAT_RAW; | |
8f67f8ae | 3538 | else if (!strcmp(arg, "--patch-with-raw")) |
c6744349 | 3539 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_RAW; |
8f67f8ae | 3540 | else if (!strcmp(arg, "--numstat")) |
74e2abe5 | 3541 | options->output_format |= DIFF_FORMAT_NUMSTAT; |
8f67f8ae | 3542 | else if (!strcmp(arg, "--shortstat")) |
ebd124c6 | 3543 | options->output_format |= DIFF_FORMAT_SHORTSTAT; |
333f3fb0 JH |
3544 | else if (!strcmp(arg, "-X") || !strcmp(arg, "--dirstat")) |
3545 | return parse_dirstat_opt(options, ""); | |
3546 | else if (!prefixcmp(arg, "-X")) | |
3547 | return parse_dirstat_opt(options, arg + 2); | |
3548 | else if (!prefixcmp(arg, "--dirstat=")) | |
3549 | return parse_dirstat_opt(options, arg + 10); | |
3550 | else if (!strcmp(arg, "--cumulative")) | |
3551 | return parse_dirstat_opt(options, "cumulative"); | |
3552 | else if (!strcmp(arg, "--dirstat-by-file")) | |
3553 | return parse_dirstat_opt(options, "files"); | |
3554 | else if (!prefixcmp(arg, "--dirstat-by-file=")) { | |
3555 | parse_dirstat_opt(options, "files"); | |
3556 | return parse_dirstat_opt(options, arg + 18); | |
f88d225f | 3557 | } |
d054680c PH |
3558 | else if (!strcmp(arg, "--check")) |
3559 | options->output_format |= DIFF_FORMAT_CHECKDIFF; | |
3560 | else if (!strcmp(arg, "--summary")) | |
3561 | options->output_format |= DIFF_FORMAT_SUMMARY; | |
3562 | else if (!strcmp(arg, "--patch-with-stat")) | |
3563 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_DIFFSTAT; | |
3564 | else if (!strcmp(arg, "--name-only")) | |
3565 | options->output_format |= DIFF_FORMAT_NAME; | |
3566 | else if (!strcmp(arg, "--name-status")) | |
3567 | options->output_format |= DIFF_FORMAT_NAME_STATUS; | |
3568 | else if (!strcmp(arg, "-s")) | |
3569 | options->output_format |= DIFF_FORMAT_NO_OUTPUT; | |
4d7f7a4a | 3570 | else if (!prefixcmp(arg, "--stat")) |
808e1db2 | 3571 | /* --stat, --stat-width, --stat-name-width, or --stat-count */ |
4d7f7a4a | 3572 | return stat_opt(options, av); |
d054680c PH |
3573 | |
3574 | /* renames options */ | |
37ab5156 KB |
3575 | else if (!prefixcmp(arg, "-B") || !prefixcmp(arg, "--break-rewrites=") || |
3576 | !strcmp(arg, "--break-rewrites")) { | |
8f67f8ae | 3577 | if ((options->break_opt = diff_scoreopt_parse(arg)) == -1) |
07cd7265 | 3578 | return error("invalid argument to -B: %s", arg+2); |
6973dcae | 3579 | } |
f611ddc7 YD |
3580 | else if (!prefixcmp(arg, "-M") || !prefixcmp(arg, "--find-renames=") || |
3581 | !strcmp(arg, "--find-renames")) { | |
8f67f8ae | 3582 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) |
07cd7265 | 3583 | return error("invalid argument to -M: %s", arg+2); |
6973dcae JH |
3584 | options->detect_rename = DIFF_DETECT_RENAME; |
3585 | } | |
467ddc14 JH |
3586 | else if (!strcmp(arg, "-D") || !strcmp(arg, "--irreversible-delete")) { |
3587 | options->irreversible_delete = 1; | |
3588 | } | |
f611ddc7 YD |
3589 | else if (!prefixcmp(arg, "-C") || !prefixcmp(arg, "--find-copies=") || |
3590 | !strcmp(arg, "--find-copies")) { | |
ca6c0970 | 3591 | if (options->detect_rename == DIFF_DETECT_COPY) |
8f67f8ae PH |
3592 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); |
3593 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) | |
07cd7265 | 3594 | return error("invalid argument to -C: %s", arg+2); |
6973dcae JH |
3595 | options->detect_rename = DIFF_DETECT_COPY; |
3596 | } | |
d054680c PH |
3597 | else if (!strcmp(arg, "--no-renames")) |
3598 | options->detect_rename = 0; | |
90d43b07 JK |
3599 | else if (!strcmp(arg, "--rename-empty")) |
3600 | DIFF_OPT_SET(options, RENAME_EMPTY); | |
3601 | else if (!strcmp(arg, "--no-rename-empty")) | |
3602 | DIFF_OPT_CLR(options, RENAME_EMPTY); | |
cd676a51 JH |
3603 | else if (!strcmp(arg, "--relative")) |
3604 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
c0cb4a06 JH |
3605 | else if (!prefixcmp(arg, "--relative=")) { |
3606 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
3607 | options->prefix = arg + 11; | |
3608 | } | |
d054680c PH |
3609 | |
3610 | /* xdiff options */ | |
81b568c8 JH |
3611 | else if (!strcmp(arg, "--minimal")) |
3612 | DIFF_XDL_SET(options, NEED_MINIMAL); | |
3613 | else if (!strcmp(arg, "--no-minimal")) | |
3614 | DIFF_XDL_CLR(options, NEED_MINIMAL); | |
d054680c | 3615 | else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space")) |
628d5c2b | 3616 | DIFF_XDL_SET(options, IGNORE_WHITESPACE); |
d054680c | 3617 | else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change")) |
628d5c2b | 3618 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_CHANGE); |
d054680c | 3619 | else if (!strcmp(arg, "--ignore-space-at-eol")) |
628d5c2b | 3620 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_AT_EOL); |
34292bdd | 3621 | else if (!strcmp(arg, "--patience")) |
307ab20b | 3622 | options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF); |
8c912eea | 3623 | else if (!strcmp(arg, "--histogram")) |
307ab20b | 3624 | options->xdl_opts = DIFF_WITH_ALG(options, HISTOGRAM_DIFF); |
d054680c PH |
3625 | |
3626 | /* flags options */ | |
3627 | else if (!strcmp(arg, "--binary")) { | |
3628 | options->output_format |= DIFF_FORMAT_PATCH; | |
3629 | DIFF_OPT_SET(options, BINARY); | |
3630 | } | |
3631 | else if (!strcmp(arg, "--full-index")) | |
3632 | DIFF_OPT_SET(options, FULL_INDEX); | |
3633 | else if (!strcmp(arg, "-a") || !strcmp(arg, "--text")) | |
3634 | DIFF_OPT_SET(options, TEXT); | |
3635 | else if (!strcmp(arg, "-R")) | |
3636 | DIFF_OPT_SET(options, REVERSE_DIFF); | |
6973dcae | 3637 | else if (!strcmp(arg, "--find-copies-harder")) |
8f67f8ae | 3638 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); |
750f7b66 | 3639 | else if (!strcmp(arg, "--follow")) |
8f67f8ae | 3640 | DIFF_OPT_SET(options, FOLLOW_RENAMES); |
cd112cef | 3641 | else if (!strcmp(arg, "--color")) |
f1c96261 | 3642 | options->use_color = 1; |
73e9da01 | 3643 | else if (!prefixcmp(arg, "--color=")) { |
e269eb79 | 3644 | int value = git_config_colorbool(NULL, arg+8); |
daa0c3d9 | 3645 | if (value < 0) |
73e9da01 | 3646 | return error("option `color' expects \"always\", \"auto\", or \"never\""); |
daa0c3d9 | 3647 | options->use_color = value; |
73e9da01 | 3648 | } |
fef88bb0 | 3649 | else if (!strcmp(arg, "--no-color")) |
f1c96261 | 3650 | options->use_color = 0; |
628d5c2b | 3651 | else if (!strcmp(arg, "--color-words")) { |
f1c96261 | 3652 | options->use_color = 1; |
882749a0 | 3653 | options->word_diff = DIFF_WORDS_COLOR; |
628d5c2b | 3654 | } |
2b6a5417 | 3655 | else if (!prefixcmp(arg, "--color-words=")) { |
f1c96261 | 3656 | options->use_color = 1; |
882749a0 | 3657 | options->word_diff = DIFF_WORDS_COLOR; |
2b6a5417 JS |
3658 | options->word_regex = arg + 14; |
3659 | } | |
882749a0 TR |
3660 | else if (!strcmp(arg, "--word-diff")) { |
3661 | if (options->word_diff == DIFF_WORDS_NONE) | |
3662 | options->word_diff = DIFF_WORDS_PLAIN; | |
3663 | } | |
3664 | else if (!prefixcmp(arg, "--word-diff=")) { | |
3665 | const char *type = arg + 12; | |
3666 | if (!strcmp(type, "plain")) | |
3667 | options->word_diff = DIFF_WORDS_PLAIN; | |
3668 | else if (!strcmp(type, "color")) { | |
f1c96261 | 3669 | options->use_color = 1; |
882749a0 TR |
3670 | options->word_diff = DIFF_WORDS_COLOR; |
3671 | } | |
3672 | else if (!strcmp(type, "porcelain")) | |
3673 | options->word_diff = DIFF_WORDS_PORCELAIN; | |
3674 | else if (!strcmp(type, "none")) | |
3675 | options->word_diff = DIFF_WORDS_NONE; | |
3676 | else | |
3677 | die("bad --word-diff argument: %s", type); | |
3678 | } | |
dea007fb | 3679 | else if ((argcount = parse_long_opt("word-diff-regex", av, &optarg))) { |
882749a0 TR |
3680 | if (options->word_diff == DIFF_WORDS_NONE) |
3681 | options->word_diff = DIFF_WORDS_PLAIN; | |
dea007fb MM |
3682 | options->word_regex = optarg; |
3683 | return argcount; | |
882749a0 | 3684 | } |
41bbf9d5 | 3685 | else if (!strcmp(arg, "--exit-code")) |
8f67f8ae | 3686 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); |
68aacb2f | 3687 | else if (!strcmp(arg, "--quiet")) |
90b19941 | 3688 | DIFF_OPT_SET(options, QUICK); |
72909bef | 3689 | else if (!strcmp(arg, "--ext-diff")) |
8f67f8ae | 3690 | DIFF_OPT_SET(options, ALLOW_EXTERNAL); |
72909bef | 3691 | else if (!strcmp(arg, "--no-ext-diff")) |
8f67f8ae | 3692 | DIFF_OPT_CLR(options, ALLOW_EXTERNAL); |
e10ea812 JK |
3693 | else if (!strcmp(arg, "--textconv")) |
3694 | DIFF_OPT_SET(options, ALLOW_TEXTCONV); | |
3695 | else if (!strcmp(arg, "--no-textconv")) | |
3696 | DIFF_OPT_CLR(options, ALLOW_TEXTCONV); | |
aee9c7d6 JL |
3697 | else if (!strcmp(arg, "--ignore-submodules")) { |
3698 | DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); | |
46a958b3 | 3699 | handle_ignore_submodules_arg(options, "all"); |
aee9c7d6 JL |
3700 | } else if (!prefixcmp(arg, "--ignore-submodules=")) { |
3701 | DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); | |
46a958b3 | 3702 | handle_ignore_submodules_arg(options, arg + 20); |
aee9c7d6 | 3703 | } else if (!strcmp(arg, "--submodule")) |
752c0c24 | 3704 | DIFF_OPT_SET(options, SUBMODULE_LOG); |
c47ef57c RR |
3705 | else if (!prefixcmp(arg, "--submodule=")) |
3706 | return parse_submodule_opt(options, arg + 12); | |
d054680c PH |
3707 | |
3708 | /* misc options */ | |
3709 | else if (!strcmp(arg, "-z")) | |
3710 | options->line_termination = 0; | |
dea007fb MM |
3711 | else if ((argcount = short_opt('l', av, &optarg))) { |
3712 | options->rename_limit = strtoul(optarg, NULL, 10); | |
3713 | return argcount; | |
3714 | } | |
3715 | else if ((argcount = short_opt('S', av, &optarg))) { | |
3716 | options->pickaxe = optarg; | |
f506b8e8 JH |
3717 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_S; |
3718 | return argcount; | |
3719 | } else if ((argcount = short_opt('G', av, &optarg))) { | |
3720 | options->pickaxe = optarg; | |
3721 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_G; | |
dea007fb MM |
3722 | return argcount; |
3723 | } | |
d054680c | 3724 | else if (!strcmp(arg, "--pickaxe-all")) |
f506b8e8 | 3725 | options->pickaxe_opts |= DIFF_PICKAXE_ALL; |
d054680c | 3726 | else if (!strcmp(arg, "--pickaxe-regex")) |
f506b8e8 | 3727 | options->pickaxe_opts |= DIFF_PICKAXE_REGEX; |
dea007fb MM |
3728 | else if ((argcount = short_opt('O', av, &optarg))) { |
3729 | options->orderfile = optarg; | |
3730 | return argcount; | |
3731 | } | |
3732 | else if ((argcount = parse_long_opt("diff-filter", av, &optarg))) { | |
3733 | options->filter = optarg; | |
3734 | return argcount; | |
3735 | } | |
d054680c PH |
3736 | else if (!strcmp(arg, "--abbrev")) |
3737 | options->abbrev = DEFAULT_ABBREV; | |
3738 | else if (!prefixcmp(arg, "--abbrev=")) { | |
3739 | options->abbrev = strtoul(arg + 9, NULL, 10); | |
3740 | if (options->abbrev < MINIMUM_ABBREV) | |
3741 | options->abbrev = MINIMUM_ABBREV; | |
3742 | else if (40 < options->abbrev) | |
3743 | options->abbrev = 40; | |
3744 | } | |
dea007fb MM |
3745 | else if ((argcount = parse_long_opt("src-prefix", av, &optarg))) { |
3746 | options->a_prefix = optarg; | |
3747 | return argcount; | |
3748 | } | |
3749 | else if ((argcount = parse_long_opt("dst-prefix", av, &optarg))) { | |
3750 | options->b_prefix = optarg; | |
3751 | return argcount; | |
3752 | } | |
eab9a40b JS |
3753 | else if (!strcmp(arg, "--no-prefix")) |
3754 | options->a_prefix = options->b_prefix = ""; | |
6d0e674a RS |
3755 | else if (opt_arg(arg, '\0', "inter-hunk-context", |
3756 | &options->interhunkcontext)) | |
3757 | ; | |
14937c2c RS |
3758 | else if (!strcmp(arg, "-W")) |
3759 | DIFF_OPT_SET(options, FUNCCONTEXT); | |
3760 | else if (!strcmp(arg, "--function-context")) | |
3761 | DIFF_OPT_SET(options, FUNCCONTEXT); | |
3762 | else if (!strcmp(arg, "--no-function-context")) | |
3763 | DIFF_OPT_CLR(options, FUNCCONTEXT); | |
dea007fb MM |
3764 | else if ((argcount = parse_long_opt("output", av, &optarg))) { |
3765 | options->file = fopen(optarg, "w"); | |
8324b977 | 3766 | if (!options->file) |
9ec26eb7 | 3767 | die_errno("Could not open '%s'", optarg); |
c0c77734 | 3768 | options->close_file = 1; |
dea007fb | 3769 | return argcount; |
c0c77734 | 3770 | } else |
6973dcae JH |
3771 | return 0; |
3772 | return 1; | |
3773 | } | |
3774 | ||
10ae7526 | 3775 | int parse_rename_score(const char **cp_p) |
6973dcae JH |
3776 | { |
3777 | unsigned long num, scale; | |
3778 | int ch, dot; | |
3779 | const char *cp = *cp_p; | |
3780 | ||
3781 | num = 0; | |
3782 | scale = 1; | |
3783 | dot = 0; | |
eeefa7c9 | 3784 | for (;;) { |
6973dcae JH |
3785 | ch = *cp; |
3786 | if ( !dot && ch == '.' ) { | |
3787 | scale = 1; | |
3788 | dot = 1; | |
3789 | } else if ( ch == '%' ) { | |
3790 | scale = dot ? scale*100 : 100; | |
3791 | cp++; /* % is always at the end */ | |
3792 | break; | |
3793 | } else if ( ch >= '0' && ch <= '9' ) { | |
3794 | if ( scale < 100000 ) { | |
3795 | scale *= 10; | |
3796 | num = (num*10) + (ch-'0'); | |
3797 | } | |
3798 | } else { | |
3799 | break; | |
3800 | } | |
3801 | cp++; | |
3802 | } | |
3803 | *cp_p = cp; | |
3804 | ||
3805 | /* user says num divided by scale and we say internally that | |
3806 | * is MAX_SCORE * num / scale. | |
3807 | */ | |
dc49cd76 | 3808 | return (int)((num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale)); |
6973dcae JH |
3809 | } |
3810 | ||
16befb8b | 3811 | static int diff_scoreopt_parse(const char *opt) |
6973dcae JH |
3812 | { |
3813 | int opt1, opt2, cmd; | |
3814 | ||
3815 | if (*opt++ != '-') | |
3816 | return -1; | |
3817 | cmd = *opt++; | |
37ab5156 KB |
3818 | if (cmd == '-') { |
3819 | /* convert the long-form arguments into short-form versions */ | |
3820 | if (!prefixcmp(opt, "break-rewrites")) { | |
3821 | opt += strlen("break-rewrites"); | |
3822 | if (*opt == 0 || *opt++ == '=') | |
3823 | cmd = 'B'; | |
f611ddc7 YD |
3824 | } else if (!prefixcmp(opt, "find-copies")) { |
3825 | opt += strlen("find-copies"); | |
37ab5156 KB |
3826 | if (*opt == 0 || *opt++ == '=') |
3827 | cmd = 'C'; | |
f611ddc7 YD |
3828 | } else if (!prefixcmp(opt, "find-renames")) { |
3829 | opt += strlen("find-renames"); | |
37ab5156 KB |
3830 | if (*opt == 0 || *opt++ == '=') |
3831 | cmd = 'M'; | |
3832 | } | |
3833 | } | |
6973dcae JH |
3834 | if (cmd != 'M' && cmd != 'C' && cmd != 'B') |
3835 | return -1; /* that is not a -M, -C nor -B option */ | |
3836 | ||
10ae7526 | 3837 | opt1 = parse_rename_score(&opt); |
6973dcae JH |
3838 | if (cmd != 'B') |
3839 | opt2 = 0; | |
3840 | else { | |
3841 | if (*opt == 0) | |
3842 | opt2 = 0; | |
3843 | else if (*opt != '/') | |
3844 | return -1; /* we expect -B80/99 or -B80 */ | |
3845 | else { | |
3846 | opt++; | |
10ae7526 | 3847 | opt2 = parse_rename_score(&opt); |
6973dcae JH |
3848 | } |
3849 | } | |
3850 | if (*opt != 0) | |
3851 | return -1; | |
3852 | return opt1 | (opt2 << 16); | |
3853 | } | |
3854 | ||
3855 | struct diff_queue_struct diff_queued_diff; | |
3856 | ||
3857 | void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) | |
3858 | { | |
3859 | if (queue->alloc <= queue->nr) { | |
3860 | queue->alloc = alloc_nr(queue->alloc); | |
3861 | queue->queue = xrealloc(queue->queue, | |
3862 | sizeof(dp) * queue->alloc); | |
3863 | } | |
3864 | queue->queue[queue->nr++] = dp; | |
3865 | } | |
3866 | ||
3867 | struct diff_filepair *diff_queue(struct diff_queue_struct *queue, | |
3868 | struct diff_filespec *one, | |
3869 | struct diff_filespec *two) | |
3870 | { | |
ef677686 | 3871 | struct diff_filepair *dp = xcalloc(1, sizeof(*dp)); |
6973dcae JH |
3872 | dp->one = one; |
3873 | dp->two = two; | |
6973dcae JH |
3874 | if (queue) |
3875 | diff_q(queue, dp); | |
3876 | return dp; | |
3877 | } | |
3878 | ||
3879 | void diff_free_filepair(struct diff_filepair *p) | |
3880 | { | |
9fb88419 LT |
3881 | free_filespec(p->one); |
3882 | free_filespec(p->two); | |
6973dcae JH |
3883 | free(p); |
3884 | } | |
3885 | ||
3886 | /* This is different from find_unique_abbrev() in that | |
3887 | * it stuffs the result with dots for alignment. | |
3888 | */ | |
3889 | const char *diff_unique_abbrev(const unsigned char *sha1, int len) | |
3890 | { | |
3891 | int abblen; | |
3892 | const char *abbrev; | |
3893 | if (len == 40) | |
3894 | return sha1_to_hex(sha1); | |
3895 | ||
3896 | abbrev = find_unique_abbrev(sha1, len); | |
6973dcae JH |
3897 | abblen = strlen(abbrev); |
3898 | if (abblen < 37) { | |
3899 | static char hex[41]; | |
3900 | if (len < abblen && abblen <= len + 2) | |
3901 | sprintf(hex, "%s%.*s", abbrev, len+3-abblen, ".."); | |
3902 | else | |
3903 | sprintf(hex, "%s...", abbrev); | |
3904 | return hex; | |
3905 | } | |
3906 | return sha1_to_hex(sha1); | |
3907 | } | |
3908 | ||
663af342 | 3909 | static void diff_flush_raw(struct diff_filepair *p, struct diff_options *opt) |
6973dcae | 3910 | { |
663af342 PH |
3911 | int line_termination = opt->line_termination; |
3912 | int inter_name_termination = line_termination ? '\t' : '\0'; | |
7be57610 BY |
3913 | if (opt->output_prefix) { |
3914 | struct strbuf *msg = NULL; | |
3915 | msg = opt->output_prefix(opt, opt->output_prefix_data); | |
3916 | fprintf(opt->file, "%s", msg->buf); | |
3917 | } | |
6973dcae | 3918 | |
663af342 | 3919 | if (!(opt->output_format & DIFF_FORMAT_NAME_STATUS)) { |
c0c77734 DB |
3920 | fprintf(opt->file, ":%06o %06o %s ", p->one->mode, p->two->mode, |
3921 | diff_unique_abbrev(p->one->sha1, opt->abbrev)); | |
3922 | fprintf(opt->file, "%s ", diff_unique_abbrev(p->two->sha1, opt->abbrev)); | |
6973dcae | 3923 | } |
663af342 | 3924 | if (p->score) { |
c0c77734 DB |
3925 | fprintf(opt->file, "%c%03d%c", p->status, similarity_index(p), |
3926 | inter_name_termination); | |
663af342 | 3927 | } else { |
c0c77734 | 3928 | fprintf(opt->file, "%c%c", p->status, inter_name_termination); |
6973dcae | 3929 | } |
6973dcae | 3930 | |
cd676a51 JH |
3931 | if (p->status == DIFF_STATUS_COPIED || |
3932 | p->status == DIFF_STATUS_RENAMED) { | |
3933 | const char *name_a, *name_b; | |
3934 | name_a = p->one->path; | |
3935 | name_b = p->two->path; | |
3936 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 DB |
3937 | write_name_quoted(name_a, opt->file, inter_name_termination); |
3938 | write_name_quoted(name_b, opt->file, line_termination); | |
663af342 | 3939 | } else { |
cd676a51 JH |
3940 | const char *name_a, *name_b; |
3941 | name_a = p->one->mode ? p->one->path : p->two->path; | |
3942 | name_b = NULL; | |
3943 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 | 3944 | write_name_quoted(name_a, opt->file, line_termination); |
663af342 | 3945 | } |
6973dcae JH |
3946 | } |
3947 | ||
3948 | int diff_unmodified_pair(struct diff_filepair *p) | |
3949 | { | |
3950 | /* This function is written stricter than necessary to support | |
3951 | * the currently implemented transformers, but the idea is to | |
3952 | * let transformers to produce diff_filepairs any way they want, | |
3953 | * and filter and clean them up here before producing the output. | |
3954 | */ | |
663af342 | 3955 | struct diff_filespec *one = p->one, *two = p->two; |
6973dcae JH |
3956 | |
3957 | if (DIFF_PAIR_UNMERGED(p)) | |
3958 | return 0; /* unmerged is interesting */ | |
3959 | ||
6973dcae JH |
3960 | /* deletion, addition, mode or type change |
3961 | * and rename are all interesting. | |
3962 | */ | |
3963 | if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || | |
3964 | DIFF_PAIR_MODE_CHANGED(p) || | |
3965 | strcmp(one->path, two->path)) | |
3966 | return 0; | |
3967 | ||
3968 | /* both are valid and point at the same path. that is, we are | |
3969 | * dealing with a change. | |
3970 | */ | |
3971 | if (one->sha1_valid && two->sha1_valid && | |
85adbf2f JL |
3972 | !hashcmp(one->sha1, two->sha1) && |
3973 | !one->dirty_submodule && !two->dirty_submodule) | |
6973dcae JH |
3974 | return 1; /* no change */ |
3975 | if (!one->sha1_valid && !two->sha1_valid) | |
3976 | return 1; /* both look at the same file on the filesystem. */ | |
3977 | return 0; | |
3978 | } | |
3979 | ||
3980 | static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) | |
3981 | { | |
3982 | if (diff_unmodified_pair(p)) | |
3983 | return; | |
3984 | ||
3985 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3986 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
3987 | return; /* no tree diffs in patch format */ | |
3988 | ||
3989 | run_diff(p, o); | |
3990 | } | |
3991 | ||
3992 | static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, | |
3993 | struct diffstat_t *diffstat) | |
3994 | { | |
3995 | if (diff_unmodified_pair(p)) | |
3996 | return; | |
3997 | ||
3998 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3999 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
c3fced64 | 4000 | return; /* no useful stat for tree diffs */ |
6973dcae JH |
4001 | |
4002 | run_diffstat(p, o, diffstat); | |
4003 | } | |
4004 | ||
88246898 JS |
4005 | static void diff_flush_checkdiff(struct diff_filepair *p, |
4006 | struct diff_options *o) | |
4007 | { | |
4008 | if (diff_unmodified_pair(p)) | |
4009 | return; | |
4010 | ||
4011 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4012 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
c3fced64 | 4013 | return; /* nothing to check in tree diffs */ |
88246898 JS |
4014 | |
4015 | run_checkdiff(p, o); | |
4016 | } | |
4017 | ||
6973dcae JH |
4018 | int diff_queue_is_empty(void) |
4019 | { | |
4020 | struct diff_queue_struct *q = &diff_queued_diff; | |
4021 | int i; | |
4022 | for (i = 0; i < q->nr; i++) | |
4023 | if (!diff_unmodified_pair(q->queue[i])) | |
4024 | return 0; | |
4025 | return 1; | |
4026 | } | |
4027 | ||
4028 | #if DIFF_DEBUG | |
4029 | void diff_debug_filespec(struct diff_filespec *s, int x, const char *one) | |
4030 | { | |
4031 | fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n", | |
4032 | x, one ? one : "", | |
4033 | s->path, | |
4034 | DIFF_FILE_VALID(s) ? "valid" : "invalid", | |
4035 | s->mode, | |
4036 | s->sha1_valid ? sha1_to_hex(s->sha1) : ""); | |
4037 | fprintf(stderr, "queue[%d] %s size %lu flags %d\n", | |
4038 | x, one ? one : "", | |
4039 | s->size, s->xfrm_flags); | |
4040 | } | |
4041 | ||
4042 | void diff_debug_filepair(const struct diff_filepair *p, int i) | |
4043 | { | |
4044 | diff_debug_filespec(p->one, i, "one"); | |
4045 | diff_debug_filespec(p->two, i, "two"); | |
64479711 | 4046 | fprintf(stderr, "score %d, status %c rename_used %d broken %d\n", |
6973dcae | 4047 | p->score, p->status ? p->status : '?', |
64479711 | 4048 | p->one->rename_used, p->broken_pair); |
6973dcae JH |
4049 | } |
4050 | ||
4051 | void diff_debug_queue(const char *msg, struct diff_queue_struct *q) | |
4052 | { | |
4053 | int i; | |
4054 | if (msg) | |
4055 | fprintf(stderr, "%s\n", msg); | |
4056 | fprintf(stderr, "q->nr = %d\n", q->nr); | |
4057 | for (i = 0; i < q->nr; i++) { | |
4058 | struct diff_filepair *p = q->queue[i]; | |
4059 | diff_debug_filepair(p, i); | |
4060 | } | |
4061 | } | |
4062 | #endif | |
4063 | ||
4064 | static void diff_resolve_rename_copy(void) | |
4065 | { | |
64479711 LT |
4066 | int i; |
4067 | struct diff_filepair *p; | |
6973dcae JH |
4068 | struct diff_queue_struct *q = &diff_queued_diff; |
4069 | ||
4070 | diff_debug_queue("resolve-rename-copy", q); | |
4071 | ||
4072 | for (i = 0; i < q->nr; i++) { | |
4073 | p = q->queue[i]; | |
4074 | p->status = 0; /* undecided */ | |
4075 | if (DIFF_PAIR_UNMERGED(p)) | |
4076 | p->status = DIFF_STATUS_UNMERGED; | |
4077 | else if (!DIFF_FILE_VALID(p->one)) | |
4078 | p->status = DIFF_STATUS_ADDED; | |
4079 | else if (!DIFF_FILE_VALID(p->two)) | |
4080 | p->status = DIFF_STATUS_DELETED; | |
4081 | else if (DIFF_PAIR_TYPE_CHANGED(p)) | |
4082 | p->status = DIFF_STATUS_TYPE_CHANGED; | |
4083 | ||
4084 | /* from this point on, we are dealing with a pair | |
4085 | * whose both sides are valid and of the same type, i.e. | |
4086 | * either in-place edit or rename/copy edit. | |
4087 | */ | |
4088 | else if (DIFF_PAIR_RENAME(p)) { | |
64479711 LT |
4089 | /* |
4090 | * A rename might have re-connected a broken | |
4091 | * pair up, causing the pathnames to be the | |
4092 | * same again. If so, that's not a rename at | |
4093 | * all, just a modification.. | |
4094 | * | |
4095 | * Otherwise, see if this source was used for | |
4096 | * multiple renames, in which case we decrement | |
4097 | * the count, and call it a copy. | |
6973dcae | 4098 | */ |
64479711 LT |
4099 | if (!strcmp(p->one->path, p->two->path)) |
4100 | p->status = DIFF_STATUS_MODIFIED; | |
4101 | else if (--p->one->rename_used > 0) | |
6973dcae | 4102 | p->status = DIFF_STATUS_COPIED; |
64479711 | 4103 | else |
6973dcae JH |
4104 | p->status = DIFF_STATUS_RENAMED; |
4105 | } | |
a89fccd2 | 4106 | else if (hashcmp(p->one->sha1, p->two->sha1) || |
d516c2d1 | 4107 | p->one->mode != p->two->mode || |
85adbf2f JL |
4108 | p->one->dirty_submodule || |
4109 | p->two->dirty_submodule || | |
d516c2d1 | 4110 | is_null_sha1(p->one->sha1)) |
6973dcae JH |
4111 | p->status = DIFF_STATUS_MODIFIED; |
4112 | else { | |
4113 | /* This is a "no-change" entry and should not | |
4114 | * happen anymore, but prepare for broken callers. | |
4115 | */ | |
4116 | error("feeding unmodified %s to diffcore", | |
4117 | p->one->path); | |
4118 | p->status = DIFF_STATUS_UNKNOWN; | |
4119 | } | |
4120 | } | |
4121 | diff_debug_queue("resolve-rename-copy done", q); | |
4122 | } | |
4123 | ||
c6744349 | 4124 | static int check_pair_status(struct diff_filepair *p) |
6973dcae | 4125 | { |
6973dcae JH |
4126 | switch (p->status) { |
4127 | case DIFF_STATUS_UNKNOWN: | |
c6744349 | 4128 | return 0; |
6973dcae JH |
4129 | case 0: |
4130 | die("internal error in diff-resolve-rename-copy"); | |
6973dcae | 4131 | default: |
c6744349 | 4132 | return 1; |
6973dcae JH |
4133 | } |
4134 | } | |
4135 | ||
c6744349 TH |
4136 | static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt) |
4137 | { | |
4138 | int fmt = opt->output_format; | |
4139 | ||
4140 | if (fmt & DIFF_FORMAT_CHECKDIFF) | |
4141 | diff_flush_checkdiff(p, opt); | |
4142 | else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) | |
4143 | diff_flush_raw(p, opt); | |
cd676a51 JH |
4144 | else if (fmt & DIFF_FORMAT_NAME) { |
4145 | const char *name_a, *name_b; | |
4146 | name_a = p->two->path; | |
4147 | name_b = NULL; | |
4148 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 | 4149 | write_name_quoted(name_a, opt->file, opt->line_termination); |
cd676a51 | 4150 | } |
c6744349 TH |
4151 | } |
4152 | ||
c0c77734 | 4153 | static void show_file_mode_name(FILE *file, const char *newdelete, struct diff_filespec *fs) |
4bbd261b SE |
4154 | { |
4155 | if (fs->mode) | |
c0c77734 | 4156 | fprintf(file, " %s mode %06o ", newdelete, fs->mode); |
4bbd261b | 4157 | else |
c0c77734 DB |
4158 | fprintf(file, " %s ", newdelete); |
4159 | write_name_quoted(fs->path, file, '\n'); | |
4bbd261b SE |
4160 | } |
4161 | ||
4162 | ||
7be57610 BY |
4163 | static void show_mode_change(FILE *file, struct diff_filepair *p, int show_name, |
4164 | const char *line_prefix) | |
4bbd261b SE |
4165 | { |
4166 | if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) { | |
7be57610 BY |
4167 | fprintf(file, "%s mode change %06o => %06o%c", line_prefix, p->one->mode, |
4168 | p->two->mode, show_name ? ' ' : '\n'); | |
0d26a64e | 4169 | if (show_name) { |
c0c77734 | 4170 | write_name_quoted(p->two->path, file, '\n'); |
0d26a64e | 4171 | } |
4bbd261b SE |
4172 | } |
4173 | } | |
4174 | ||
7be57610 BY |
4175 | static void show_rename_copy(FILE *file, const char *renamecopy, struct diff_filepair *p, |
4176 | const char *line_prefix) | |
4bbd261b | 4177 | { |
b9f44164 | 4178 | char *names = pprint_rename(p->one->path, p->two->path); |
4bbd261b | 4179 | |
c0c77734 | 4180 | fprintf(file, " %s %s (%d%%)\n", renamecopy, names, similarity_index(p)); |
b9f44164 | 4181 | free(names); |
7be57610 | 4182 | show_mode_change(file, p, 0, line_prefix); |
4bbd261b SE |
4183 | } |
4184 | ||
7be57610 | 4185 | static void diff_summary(struct diff_options *opt, struct diff_filepair *p) |
4bbd261b | 4186 | { |
7be57610 BY |
4187 | FILE *file = opt->file; |
4188 | char *line_prefix = ""; | |
4189 | ||
4190 | if (opt->output_prefix) { | |
4191 | struct strbuf *buf = opt->output_prefix(opt, opt->output_prefix_data); | |
4192 | line_prefix = buf->buf; | |
4193 | } | |
4194 | ||
4bbd261b SE |
4195 | switch(p->status) { |
4196 | case DIFF_STATUS_DELETED: | |
7be57610 | 4197 | fputs(line_prefix, file); |
c0c77734 | 4198 | show_file_mode_name(file, "delete", p->one); |
4bbd261b SE |
4199 | break; |
4200 | case DIFF_STATUS_ADDED: | |
7be57610 | 4201 | fputs(line_prefix, file); |
c0c77734 | 4202 | show_file_mode_name(file, "create", p->two); |
4bbd261b SE |
4203 | break; |
4204 | case DIFF_STATUS_COPIED: | |
7be57610 BY |
4205 | fputs(line_prefix, file); |
4206 | show_rename_copy(file, "copy", p, line_prefix); | |
4bbd261b SE |
4207 | break; |
4208 | case DIFF_STATUS_RENAMED: | |
7be57610 BY |
4209 | fputs(line_prefix, file); |
4210 | show_rename_copy(file, "rename", p, line_prefix); | |
4bbd261b SE |
4211 | break; |
4212 | default: | |
4213 | if (p->score) { | |
7be57610 | 4214 | fprintf(file, "%s rewrite ", line_prefix); |
c0c77734 DB |
4215 | write_name_quoted(p->two->path, file, ' '); |
4216 | fprintf(file, "(%d%%)\n", similarity_index(p)); | |
663af342 | 4217 | } |
7be57610 | 4218 | show_mode_change(file, p, !p->score, line_prefix); |
4bbd261b SE |
4219 | break; |
4220 | } | |
4221 | } | |
4222 | ||
fcb3d0ad | 4223 | struct patch_id_t { |
9126f009 | 4224 | git_SHA_CTX *ctx; |
fcb3d0ad JS |
4225 | int patchlen; |
4226 | }; | |
4227 | ||
4228 | static int remove_space(char *line, int len) | |
4229 | { | |
4230 | int i; | |
663af342 PH |
4231 | char *dst = line; |
4232 | unsigned char c; | |
fcb3d0ad | 4233 | |
663af342 PH |
4234 | for (i = 0; i < len; i++) |
4235 | if (!isspace((c = line[i]))) | |
4236 | *dst++ = c; | |
fcb3d0ad | 4237 | |
663af342 | 4238 | return dst - line; |
fcb3d0ad JS |
4239 | } |
4240 | ||
4241 | static void patch_id_consume(void *priv, char *line, unsigned long len) | |
4242 | { | |
4243 | struct patch_id_t *data = priv; | |
4244 | int new_len; | |
4245 | ||
4246 | /* Ignore line numbers when computing the SHA1 of the patch */ | |
cc44c765 | 4247 | if (!prefixcmp(line, "@@ -")) |
fcb3d0ad JS |
4248 | return; |
4249 | ||
4250 | new_len = remove_space(line, len); | |
4251 | ||
9126f009 | 4252 | git_SHA1_Update(data->ctx, line, new_len); |
fcb3d0ad JS |
4253 | data->patchlen += new_len; |
4254 | } | |
4255 | ||
4256 | /* returns 0 upon success, and writes result into sha1 */ | |
4257 | static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) | |
4258 | { | |
4259 | struct diff_queue_struct *q = &diff_queued_diff; | |
4260 | int i; | |
9126f009 | 4261 | git_SHA_CTX ctx; |
fcb3d0ad JS |
4262 | struct patch_id_t data; |
4263 | char buffer[PATH_MAX * 4 + 20]; | |
4264 | ||
9126f009 | 4265 | git_SHA1_Init(&ctx); |
fcb3d0ad JS |
4266 | memset(&data, 0, sizeof(struct patch_id_t)); |
4267 | data.ctx = &ctx; | |
fcb3d0ad JS |
4268 | |
4269 | for (i = 0; i < q->nr; i++) { | |
4270 | xpparam_t xpp; | |
4271 | xdemitconf_t xecfg; | |
fcb3d0ad JS |
4272 | mmfile_t mf1, mf2; |
4273 | struct diff_filepair *p = q->queue[i]; | |
4274 | int len1, len2; | |
4275 | ||
9ccd0a88 | 4276 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 4277 | memset(&xecfg, 0, sizeof(xecfg)); |
fcb3d0ad JS |
4278 | if (p->status == 0) |
4279 | return error("internal diff status error"); | |
4280 | if (p->status == DIFF_STATUS_UNKNOWN) | |
4281 | continue; | |
4282 | if (diff_unmodified_pair(p)) | |
4283 | continue; | |
4284 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4285 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
4286 | continue; | |
4287 | if (DIFF_PAIR_UNMERGED(p)) | |
4288 | continue; | |
4289 | ||
4290 | diff_fill_sha1_info(p->one); | |
4291 | diff_fill_sha1_info(p->two); | |
4292 | if (fill_mmfile(&mf1, p->one) < 0 || | |
4293 | fill_mmfile(&mf2, p->two) < 0) | |
4294 | return error("unable to read files to diff"); | |
4295 | ||
fcb3d0ad JS |
4296 | len1 = remove_space(p->one->path, strlen(p->one->path)); |
4297 | len2 = remove_space(p->two->path, strlen(p->two->path)); | |
4298 | if (p->one->mode == 0) | |
4299 | len1 = snprintf(buffer, sizeof(buffer), | |
4300 | "diff--gita/%.*sb/%.*s" | |
4301 | "newfilemode%06o" | |
4302 | "---/dev/null" | |
4303 | "+++b/%.*s", | |
4304 | len1, p->one->path, | |
4305 | len2, p->two->path, | |
4306 | p->two->mode, | |
4307 | len2, p->two->path); | |
4308 | else if (p->two->mode == 0) | |
4309 | len1 = snprintf(buffer, sizeof(buffer), | |
4310 | "diff--gita/%.*sb/%.*s" | |
4311 | "deletedfilemode%06o" | |
4312 | "---a/%.*s" | |
4313 | "+++/dev/null", | |
4314 | len1, p->one->path, | |
4315 | len2, p->two->path, | |
4316 | p->one->mode, | |
4317 | len1, p->one->path); | |
4318 | else | |
4319 | len1 = snprintf(buffer, sizeof(buffer), | |
4320 | "diff--gita/%.*sb/%.*s" | |
4321 | "---a/%.*s" | |
4322 | "+++b/%.*s", | |
4323 | len1, p->one->path, | |
4324 | len2, p->two->path, | |
4325 | len1, p->one->path, | |
4326 | len2, p->two->path); | |
9126f009 | 4327 | git_SHA1_Update(&ctx, buffer, len1); |
fcb3d0ad | 4328 | |
34597c1f CB |
4329 | if (diff_filespec_is_binary(p->one) || |
4330 | diff_filespec_is_binary(p->two)) { | |
4331 | git_SHA1_Update(&ctx, sha1_to_hex(p->one->sha1), 40); | |
4332 | git_SHA1_Update(&ctx, sha1_to_hex(p->two->sha1), 40); | |
4333 | continue; | |
4334 | } | |
4335 | ||
582aa00b | 4336 | xpp.flags = 0; |
fcb3d0ad | 4337 | xecfg.ctxlen = 3; |
ad14b450 | 4338 | xecfg.flags = 0; |
8a3f524b | 4339 | xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data, |
dfea7900 | 4340 | &xpp, &xecfg); |
fcb3d0ad JS |
4341 | } |
4342 | ||
9126f009 | 4343 | git_SHA1_Final(sha1, &ctx); |
fcb3d0ad JS |
4344 | return 0; |
4345 | } | |
4346 | ||
4347 | int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1) | |
4348 | { | |
4349 | struct diff_queue_struct *q = &diff_queued_diff; | |
4350 | int i; | |
4351 | int result = diff_get_patch_id(options, sha1); | |
4352 | ||
4353 | for (i = 0; i < q->nr; i++) | |
4354 | diff_free_filepair(q->queue[i]); | |
4355 | ||
4356 | free(q->queue); | |
9ca5df90 | 4357 | DIFF_QUEUE_CLEAR(q); |
fcb3d0ad JS |
4358 | |
4359 | return result; | |
4360 | } | |
4361 | ||
946c3784 | 4362 | static int is_summary_empty(const struct diff_queue_struct *q) |
6973dcae | 4363 | { |
6973dcae | 4364 | int i; |
6973dcae | 4365 | |
946c3784 TH |
4366 | for (i = 0; i < q->nr; i++) { |
4367 | const struct diff_filepair *p = q->queue[i]; | |
4368 | ||
4369 | switch (p->status) { | |
4370 | case DIFF_STATUS_DELETED: | |
4371 | case DIFF_STATUS_ADDED: | |
4372 | case DIFF_STATUS_COPIED: | |
4373 | case DIFF_STATUS_RENAMED: | |
4374 | return 0; | |
4375 | default: | |
4376 | if (p->score) | |
4377 | return 0; | |
4378 | if (p->one->mode && p->two->mode && | |
4379 | p->one->mode != p->two->mode) | |
4380 | return 0; | |
4381 | break; | |
4382 | } | |
6973dcae | 4383 | } |
946c3784 TH |
4384 | return 1; |
4385 | } | |
4386 | ||
f31027c9 JH |
4387 | static const char rename_limit_warning[] = |
4388 | "inexact rename detection was skipped due to too many files."; | |
4389 | ||
4390 | static const char degrade_cc_to_c_warning[] = | |
4391 | "only found copies from modified paths due to too many files."; | |
4392 | ||
4393 | static const char rename_limit_advice[] = | |
4394 | "you may want to set your %s variable to at least " | |
4395 | "%d and retry the command."; | |
4396 | ||
4397 | void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc) | |
4398 | { | |
4399 | if (degraded_cc) | |
4400 | warning(degrade_cc_to_c_warning); | |
4401 | else if (needed) | |
4402 | warning(rename_limit_warning); | |
4403 | else | |
4404 | return; | |
4405 | if (0 < needed && needed < 32767) | |
4406 | warning(rename_limit_advice, varname, needed); | |
4407 | } | |
4408 | ||
6973dcae JH |
4409 | void diff_flush(struct diff_options *options) |
4410 | { | |
4411 | struct diff_queue_struct *q = &diff_queued_diff; | |
c6744349 | 4412 | int i, output_format = options->output_format; |
946c3784 | 4413 | int separator = 0; |
1c57a627 | 4414 | int dirstat_by_line = 0; |
6973dcae | 4415 | |
c6744349 TH |
4416 | /* |
4417 | * Order: raw, stat, summary, patch | |
4418 | * or: name/name-status/checkdiff (other bits clear) | |
4419 | */ | |
946c3784 TH |
4420 | if (!q->nr) |
4421 | goto free_queue; | |
6973dcae | 4422 | |
c6744349 TH |
4423 | if (output_format & (DIFF_FORMAT_RAW | |
4424 | DIFF_FORMAT_NAME | | |
4425 | DIFF_FORMAT_NAME_STATUS | | |
4426 | DIFF_FORMAT_CHECKDIFF)) { | |
6973dcae JH |
4427 | for (i = 0; i < q->nr; i++) { |
4428 | struct diff_filepair *p = q->queue[i]; | |
c6744349 TH |
4429 | if (check_pair_status(p)) |
4430 | flush_one_pair(p, options); | |
6973dcae | 4431 | } |
946c3784 | 4432 | separator++; |
6973dcae | 4433 | } |
c6744349 | 4434 | |
1c57a627 JH |
4435 | if (output_format & DIFF_FORMAT_DIRSTAT && DIFF_OPT_TST(options, DIRSTAT_BY_LINE)) |
4436 | dirstat_by_line = 1; | |
4437 | ||
4438 | if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT) || | |
4439 | dirstat_by_line) { | |
5e2b0636 | 4440 | struct diffstat_t diffstat; |
c6744349 | 4441 | |
5e2b0636 | 4442 | memset(&diffstat, 0, sizeof(struct diffstat_t)); |
6973dcae JH |
4443 | for (i = 0; i < q->nr; i++) { |
4444 | struct diff_filepair *p = q->queue[i]; | |
c6744349 | 4445 | if (check_pair_status(p)) |
5e2b0636 | 4446 | diff_flush_stat(p, options, &diffstat); |
6973dcae | 4447 | } |
74e2abe5 JH |
4448 | if (output_format & DIFF_FORMAT_NUMSTAT) |
4449 | show_numstat(&diffstat, options); | |
4450 | if (output_format & DIFF_FORMAT_DIFFSTAT) | |
4451 | show_stats(&diffstat, options); | |
f604652e | 4452 | if (output_format & DIFF_FORMAT_SHORTSTAT) |
c0c77734 | 4453 | show_shortstats(&diffstat, options); |
1c57a627 JH |
4454 | if (output_format & DIFF_FORMAT_DIRSTAT) |
4455 | show_dirstat_by_line(&diffstat, options); | |
f604652e | 4456 | free_diffstat_info(&diffstat); |
3969cf7d | 4457 | separator++; |
6973dcae | 4458 | } |
1c57a627 | 4459 | if ((output_format & DIFF_FORMAT_DIRSTAT) && !dirstat_by_line) |
c04a7155 | 4460 | show_dirstat(options); |
6973dcae | 4461 | |
946c3784 | 4462 | if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { |
7be57610 BY |
4463 | for (i = 0; i < q->nr; i++) { |
4464 | diff_summary(options, q->queue[i]); | |
4465 | } | |
3969cf7d | 4466 | separator++; |
6973dcae JH |
4467 | } |
4468 | ||
6977c250 LA |
4469 | if (output_format & DIFF_FORMAT_NO_OUTPUT && |
4470 | DIFF_OPT_TST(options, EXIT_WITH_STATUS) && | |
4471 | DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { | |
4472 | /* | |
4473 | * run diff_flush_patch for the exit status. setting | |
4474 | * options->file to /dev/null should be safe, becaue we | |
4475 | * aren't supposed to produce any output anyway. | |
4476 | */ | |
4477 | if (options->close_file) | |
4478 | fclose(options->file); | |
4479 | options->file = fopen("/dev/null", "w"); | |
4480 | if (!options->file) | |
4481 | die_errno("Could not open /dev/null"); | |
4482 | options->close_file = 1; | |
4483 | for (i = 0; i < q->nr; i++) { | |
4484 | struct diff_filepair *p = q->queue[i]; | |
4485 | if (check_pair_status(p)) | |
4486 | diff_flush_patch(p, options); | |
4487 | if (options->found_changes) | |
4488 | break; | |
4489 | } | |
4490 | } | |
4491 | ||
c6744349 | 4492 | if (output_format & DIFF_FORMAT_PATCH) { |
946c3784 | 4493 | if (separator) { |
b18e97ce LP |
4494 | if (options->output_prefix) { |
4495 | struct strbuf *msg = NULL; | |
4496 | msg = options->output_prefix(options, | |
4497 | options->output_prefix_data); | |
4498 | fwrite(msg->buf, msg->len, 1, stdout); | |
4499 | } | |
6b2fbaaf | 4500 | putc(options->line_termination, options->file); |
946c3784 TH |
4501 | if (options->stat_sep) { |
4502 | /* attach patch instead of inline */ | |
c0c77734 | 4503 | fputs(options->stat_sep, options->file); |
946c3784 | 4504 | } |
c6744349 TH |
4505 | } |
4506 | ||
4507 | for (i = 0; i < q->nr; i++) { | |
4508 | struct diff_filepair *p = q->queue[i]; | |
4509 | if (check_pair_status(p)) | |
4510 | diff_flush_patch(p, options); | |
4511 | } | |
4bbd261b SE |
4512 | } |
4513 | ||
04245581 JK |
4514 | if (output_format & DIFF_FORMAT_CALLBACK) |
4515 | options->format_callback(q, options, options->format_callback_data); | |
4516 | ||
c6744349 TH |
4517 | for (i = 0; i < q->nr; i++) |
4518 | diff_free_filepair(q->queue[i]); | |
946c3784 | 4519 | free_queue: |
6973dcae | 4520 | free(q->queue); |
9ca5df90 | 4521 | DIFF_QUEUE_CLEAR(q); |
c0c77734 DB |
4522 | if (options->close_file) |
4523 | fclose(options->file); | |
f245194f JH |
4524 | |
4525 | /* | |
97bf2a08 | 4526 | * Report the content-level differences with HAS_CHANGES; |
f245194f JH |
4527 | * diff_addremove/diff_change does not set the bit when |
4528 | * DIFF_FROM_CONTENTS is in effect (e.g. with -w). | |
4529 | */ | |
4530 | if (DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { | |
4531 | if (options->found_changes) | |
4532 | DIFF_OPT_SET(options, HAS_CHANGES); | |
4533 | else | |
4534 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
4535 | } | |
6973dcae JH |
4536 | } |
4537 | ||
4538 | static void diffcore_apply_filter(const char *filter) | |
4539 | { | |
4540 | int i; | |
4541 | struct diff_queue_struct *q = &diff_queued_diff; | |
4542 | struct diff_queue_struct outq; | |
9ca5df90 | 4543 | DIFF_QUEUE_CLEAR(&outq); |
6973dcae JH |
4544 | |
4545 | if (!filter) | |
4546 | return; | |
4547 | ||
4548 | if (strchr(filter, DIFF_STATUS_FILTER_AON)) { | |
4549 | int found; | |
4550 | for (i = found = 0; !found && i < q->nr; i++) { | |
4551 | struct diff_filepair *p = q->queue[i]; | |
4552 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
4553 | ((p->score && | |
4554 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
4555 | (!p->score && | |
4556 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
4557 | ((p->status != DIFF_STATUS_MODIFIED) && | |
4558 | strchr(filter, p->status))) | |
4559 | found++; | |
4560 | } | |
4561 | if (found) | |
4562 | return; | |
4563 | ||
4564 | /* otherwise we will clear the whole queue | |
4565 | * by copying the empty outq at the end of this | |
4566 | * function, but first clear the current entries | |
4567 | * in the queue. | |
4568 | */ | |
4569 | for (i = 0; i < q->nr; i++) | |
4570 | diff_free_filepair(q->queue[i]); | |
4571 | } | |
4572 | else { | |
4573 | /* Only the matching ones */ | |
4574 | for (i = 0; i < q->nr; i++) { | |
4575 | struct diff_filepair *p = q->queue[i]; | |
4576 | ||
4577 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
4578 | ((p->score && | |
4579 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
4580 | (!p->score && | |
4581 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
4582 | ((p->status != DIFF_STATUS_MODIFIED) && | |
4583 | strchr(filter, p->status))) | |
4584 | diff_q(&outq, p); | |
4585 | else | |
4586 | diff_free_filepair(p); | |
4587 | } | |
4588 | } | |
4589 | free(q->queue); | |
4590 | *q = outq; | |
4591 | } | |
4592 | ||
5701115a SV |
4593 | /* Check whether two filespecs with the same mode and size are identical */ |
4594 | static int diff_filespec_is_identical(struct diff_filespec *one, | |
4595 | struct diff_filespec *two) | |
4596 | { | |
2b459b48 JH |
4597 | if (S_ISGITLINK(one->mode)) |
4598 | return 0; | |
5701115a SV |
4599 | if (diff_populate_filespec(one, 0)) |
4600 | return 0; | |
4601 | if (diff_populate_filespec(two, 0)) | |
4602 | return 0; | |
4603 | return !memcmp(one->data, two->data, one->size); | |
4604 | } | |
4605 | ||
fb13227e JH |
4606 | static void diffcore_skip_stat_unmatch(struct diff_options *diffopt) |
4607 | { | |
4608 | int i; | |
4609 | struct diff_queue_struct *q = &diff_queued_diff; | |
4610 | struct diff_queue_struct outq; | |
9ca5df90 | 4611 | DIFF_QUEUE_CLEAR(&outq); |
fb13227e JH |
4612 | |
4613 | for (i = 0; i < q->nr; i++) { | |
4614 | struct diff_filepair *p = q->queue[i]; | |
4615 | ||
4616 | /* | |
9517e6b8 | 4617 | * 1. Entries that come from stat info dirtiness |
fb13227e JH |
4618 | * always have both sides (iow, not create/delete), |
4619 | * one side of the object name is unknown, with | |
4620 | * the same mode and size. Keep the ones that | |
4621 | * do not match these criteria. They have real | |
4622 | * differences. | |
4623 | * | |
4624 | * 2. At this point, the file is known to be modified, | |
4625 | * with the same mode and size, and the object | |
4626 | * name of one side is unknown. Need to inspect | |
4627 | * the identical contents. | |
4628 | */ | |
4629 | if (!DIFF_FILE_VALID(p->one) || /* (1) */ | |
4630 | !DIFF_FILE_VALID(p->two) || | |
4631 | (p->one->sha1_valid && p->two->sha1_valid) || | |
4632 | (p->one->mode != p->two->mode) || | |
4633 | diff_populate_filespec(p->one, 1) || | |
4634 | diff_populate_filespec(p->two, 1) || | |
4635 | (p->one->size != p->two->size) || | |
5701115a | 4636 | !diff_filespec_is_identical(p->one, p->two)) /* (2) */ |
fb13227e JH |
4637 | diff_q(&outq, p); |
4638 | else { | |
4639 | /* | |
4640 | * The caller can subtract 1 from skip_stat_unmatch | |
4641 | * to determine how many paths were dirty only | |
4642 | * due to stat info mismatch. | |
4643 | */ | |
8f67f8ae | 4644 | if (!DIFF_OPT_TST(diffopt, NO_INDEX)) |
6d2d9e86 | 4645 | diffopt->skip_stat_unmatch++; |
fb13227e JH |
4646 | diff_free_filepair(p); |
4647 | } | |
4648 | } | |
4649 | free(q->queue); | |
4650 | *q = outq; | |
4651 | } | |
4652 | ||
730f7284 JH |
4653 | static int diffnamecmp(const void *a_, const void *b_) |
4654 | { | |
4655 | const struct diff_filepair *a = *((const struct diff_filepair **)a_); | |
4656 | const struct diff_filepair *b = *((const struct diff_filepair **)b_); | |
4657 | const char *name_a, *name_b; | |
4658 | ||
4659 | name_a = a->one ? a->one->path : a->two->path; | |
4660 | name_b = b->one ? b->one->path : b->two->path; | |
4661 | return strcmp(name_a, name_b); | |
4662 | } | |
4663 | ||
4664 | void diffcore_fix_diff_index(struct diff_options *options) | |
4665 | { | |
4666 | struct diff_queue_struct *q = &diff_queued_diff; | |
4667 | qsort(q->queue, q->nr, sizeof(q->queue[0]), diffnamecmp); | |
4668 | } | |
4669 | ||
6973dcae JH |
4670 | void diffcore_std(struct diff_options *options) |
4671 | { | |
9d865356 | 4672 | if (options->skip_stat_unmatch) |
fb13227e | 4673 | diffcore_skip_stat_unmatch(options); |
44c48a90 JH |
4674 | if (!options->found_follow) { |
4675 | /* See try_to_follow_renames() in tree-diff.c */ | |
4676 | if (options->break_opt != -1) | |
4677 | diffcore_break(options->break_opt); | |
4678 | if (options->detect_rename) | |
4679 | diffcore_rename(options); | |
4680 | if (options->break_opt != -1) | |
4681 | diffcore_merge_broken(); | |
4682 | } | |
6973dcae | 4683 | if (options->pickaxe) |
382f013b | 4684 | diffcore_pickaxe(options); |
6973dcae JH |
4685 | if (options->orderfile) |
4686 | diffcore_order(options->orderfile); | |
44c48a90 JH |
4687 | if (!options->found_follow) |
4688 | /* See try_to_follow_renames() in tree-diff.c */ | |
4689 | diff_resolve_rename_copy(); | |
6973dcae | 4690 | diffcore_apply_filter(options->filter); |
68aacb2f | 4691 | |
f245194f | 4692 | if (diff_queued_diff.nr && !DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
8f67f8ae PH |
4693 | DIFF_OPT_SET(options, HAS_CHANGES); |
4694 | else | |
4695 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
1da6175d | 4696 | |
44c48a90 | 4697 | options->found_follow = 0; |
6973dcae JH |
4698 | } |
4699 | ||
da31b358 JH |
4700 | int diff_result_code(struct diff_options *opt, int status) |
4701 | { | |
4702 | int result = 0; | |
f31027c9 JH |
4703 | |
4704 | diff_warn_rename_limit("diff.renamelimit", | |
4705 | opt->needed_rename_limit, | |
4706 | opt->degraded_cc_to_c); | |
da31b358 JH |
4707 | if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && |
4708 | !(opt->output_format & DIFF_FORMAT_CHECKDIFF)) | |
4709 | return status; | |
4710 | if (DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
4711 | DIFF_OPT_TST(opt, HAS_CHANGES)) | |
4712 | result |= 01; | |
4713 | if ((opt->output_format & DIFF_FORMAT_CHECKDIFF) && | |
4714 | DIFF_OPT_TST(opt, CHECK_FAILED)) | |
4715 | result |= 02; | |
4716 | return result; | |
4717 | } | |
6973dcae | 4718 | |
28b9264d JH |
4719 | int diff_can_quit_early(struct diff_options *opt) |
4720 | { | |
4721 | return (DIFF_OPT_TST(opt, QUICK) && | |
4722 | !opt->filter && | |
4723 | DIFF_OPT_TST(opt, HAS_CHANGES)); | |
4724 | } | |
4725 | ||
aee9c7d6 JL |
4726 | /* |
4727 | * Shall changes to this submodule be ignored? | |
4728 | * | |
4729 | * Submodule changes can be configured to be ignored separately for each path, | |
4730 | * but that configuration can be overridden from the command line. | |
4731 | */ | |
4732 | static int is_submodule_ignored(const char *path, struct diff_options *options) | |
4733 | { | |
4734 | int ignored = 0; | |
4735 | unsigned orig_flags = options->flags; | |
4736 | if (!DIFF_OPT_TST(options, OVERRIDE_SUBMODULE_CONFIG)) | |
4737 | set_diffopt_flags_from_submodule_config(options, path); | |
4738 | if (DIFF_OPT_TST(options, IGNORE_SUBMODULES)) | |
4739 | ignored = 1; | |
4740 | options->flags = orig_flags; | |
4741 | return ignored; | |
4742 | } | |
4743 | ||
6973dcae JH |
4744 | void diff_addremove(struct diff_options *options, |
4745 | int addremove, unsigned mode, | |
4746 | const unsigned char *sha1, | |
e5450100 | 4747 | int sha1_valid, |
e3d42c47 | 4748 | const char *concatpath, unsigned dirty_submodule) |
6973dcae | 4749 | { |
6973dcae JH |
4750 | struct diff_filespec *one, *two; |
4751 | ||
aee9c7d6 | 4752 | if (S_ISGITLINK(mode) && is_submodule_ignored(concatpath, options)) |
50fd9bd8 JS |
4753 | return; |
4754 | ||
6973dcae JH |
4755 | /* This may look odd, but it is a preparation for |
4756 | * feeding "there are unchanged files which should | |
4757 | * not produce diffs, but when you are doing copy | |
4758 | * detection you would need them, so here they are" | |
4759 | * entries to the diff-core. They will be prefixed | |
4760 | * with something like '=' or '*' (I haven't decided | |
4761 | * which but should not make any difference). | |
a6080a0a | 4762 | * Feeding the same new and old to diff_change() |
6973dcae JH |
4763 | * also has the same effect. |
4764 | * Before the final output happens, they are pruned after | |
4765 | * merged into rename/copy pairs as appropriate. | |
4766 | */ | |
8f67f8ae | 4767 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) |
6973dcae JH |
4768 | addremove = (addremove == '+' ? '-' : |
4769 | addremove == '-' ? '+' : addremove); | |
4770 | ||
cd676a51 JH |
4771 | if (options->prefix && |
4772 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
4773 | return; | |
4774 | ||
6973dcae JH |
4775 | one = alloc_filespec(concatpath); |
4776 | two = alloc_filespec(concatpath); | |
4777 | ||
4778 | if (addremove != '+') | |
e5450100 | 4779 | fill_filespec(one, sha1, sha1_valid, mode); |
e3d42c47 | 4780 | if (addremove != '-') { |
e5450100 | 4781 | fill_filespec(two, sha1, sha1_valid, mode); |
e3d42c47 JL |
4782 | two->dirty_submodule = dirty_submodule; |
4783 | } | |
6973dcae JH |
4784 | |
4785 | diff_queue(&diff_queued_diff, one, two); | |
f245194f JH |
4786 | if (!DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
4787 | DIFF_OPT_SET(options, HAS_CHANGES); | |
6973dcae JH |
4788 | } |
4789 | ||
4790 | void diff_change(struct diff_options *options, | |
4791 | unsigned old_mode, unsigned new_mode, | |
4792 | const unsigned char *old_sha1, | |
4793 | const unsigned char *new_sha1, | |
e5450100 | 4794 | int old_sha1_valid, int new_sha1_valid, |
e3d42c47 JL |
4795 | const char *concatpath, |
4796 | unsigned old_dirty_submodule, unsigned new_dirty_submodule) | |
6973dcae | 4797 | { |
6973dcae JH |
4798 | struct diff_filespec *one, *two; |
4799 | ||
aee9c7d6 JL |
4800 | if (S_ISGITLINK(old_mode) && S_ISGITLINK(new_mode) && |
4801 | is_submodule_ignored(concatpath, options)) | |
50fd9bd8 JS |
4802 | return; |
4803 | ||
8f67f8ae | 4804 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) { |
6973dcae JH |
4805 | unsigned tmp; |
4806 | const unsigned char *tmp_c; | |
4807 | tmp = old_mode; old_mode = new_mode; new_mode = tmp; | |
4808 | tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c; | |
e5450100 JK |
4809 | tmp = old_sha1_valid; old_sha1_valid = new_sha1_valid; |
4810 | new_sha1_valid = tmp; | |
e3d42c47 JL |
4811 | tmp = old_dirty_submodule; old_dirty_submodule = new_dirty_submodule; |
4812 | new_dirty_submodule = tmp; | |
6973dcae | 4813 | } |
cd676a51 JH |
4814 | |
4815 | if (options->prefix && | |
4816 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
4817 | return; | |
4818 | ||
6973dcae JH |
4819 | one = alloc_filespec(concatpath); |
4820 | two = alloc_filespec(concatpath); | |
e5450100 JK |
4821 | fill_filespec(one, old_sha1, old_sha1_valid, old_mode); |
4822 | fill_filespec(two, new_sha1, new_sha1_valid, new_mode); | |
e3d42c47 JL |
4823 | one->dirty_submodule = old_dirty_submodule; |
4824 | two->dirty_submodule = new_dirty_submodule; | |
6973dcae JH |
4825 | |
4826 | diff_queue(&diff_queued_diff, one, two); | |
f245194f JH |
4827 | if (!DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
4828 | DIFF_OPT_SET(options, HAS_CHANGES); | |
6973dcae JH |
4829 | } |
4830 | ||
fa7b2908 | 4831 | struct diff_filepair *diff_unmerge(struct diff_options *options, const char *path) |
6973dcae | 4832 | { |
76399c01 | 4833 | struct diff_filepair *pair; |
6973dcae | 4834 | struct diff_filespec *one, *two; |
cd676a51 JH |
4835 | |
4836 | if (options->prefix && | |
4837 | strncmp(path, options->prefix, options->prefix_length)) | |
76399c01 | 4838 | return NULL; |
cd676a51 | 4839 | |
6973dcae JH |
4840 | one = alloc_filespec(path); |
4841 | two = alloc_filespec(path); | |
76399c01 JH |
4842 | pair = diff_queue(&diff_queued_diff, one, two); |
4843 | pair->is_unmerged = 1; | |
4844 | return pair; | |
6973dcae | 4845 | } |
9cb92c39 JK |
4846 | |
4847 | static char *run_textconv(const char *pgm, struct diff_filespec *spec, | |
4848 | size_t *outsize) | |
4849 | { | |
479b0ae8 | 4850 | struct diff_tempfile *temp; |
9cb92c39 JK |
4851 | const char *argv[3]; |
4852 | const char **arg = argv; | |
4853 | struct child_process child; | |
4854 | struct strbuf buf = STRBUF_INIT; | |
da1fbed3 | 4855 | int err = 0; |
9cb92c39 | 4856 | |
479b0ae8 | 4857 | temp = prepare_temp_file(spec->path, spec); |
9cb92c39 | 4858 | *arg++ = pgm; |
479b0ae8 | 4859 | *arg++ = temp->name; |
9cb92c39 JK |
4860 | *arg = NULL; |
4861 | ||
4862 | memset(&child, 0, sizeof(child)); | |
41a457e4 | 4863 | child.use_shell = 1; |
9cb92c39 JK |
4864 | child.argv = argv; |
4865 | child.out = -1; | |
da1fbed3 | 4866 | if (start_command(&child)) { |
479b0ae8 | 4867 | remove_tempfile(); |
9cb92c39 JK |
4868 | return NULL; |
4869 | } | |
da1fbed3 JS |
4870 | |
4871 | if (strbuf_read(&buf, child.out, 0) < 0) | |
4872 | err = error("error reading from textconv command '%s'", pgm); | |
70d70999 | 4873 | close(child.out); |
da1fbed3 JS |
4874 | |
4875 | if (finish_command(&child) || err) { | |
4876 | strbuf_release(&buf); | |
4877 | remove_tempfile(); | |
4878 | return NULL; | |
4879 | } | |
479b0ae8 | 4880 | remove_tempfile(); |
9cb92c39 JK |
4881 | |
4882 | return strbuf_detach(&buf, outsize); | |
4883 | } | |
840383b2 | 4884 | |
a788d7d5 AB |
4885 | size_t fill_textconv(struct userdiff_driver *driver, |
4886 | struct diff_filespec *df, | |
4887 | char **outbuf) | |
840383b2 JK |
4888 | { |
4889 | size_t size; | |
4890 | ||
d9bae1a1 | 4891 | if (!driver || !driver->textconv) { |
840383b2 JK |
4892 | if (!DIFF_FILE_VALID(df)) { |
4893 | *outbuf = ""; | |
4894 | return 0; | |
4895 | } | |
4896 | if (diff_populate_filespec(df, 0)) | |
4897 | die("unable to read files to diff"); | |
4898 | *outbuf = df->data; | |
4899 | return df->size; | |
4900 | } | |
4901 | ||
9ec09b04 | 4902 | if (driver->textconv_cache && df->sha1_valid) { |
d9bae1a1 JK |
4903 | *outbuf = notes_cache_get(driver->textconv_cache, df->sha1, |
4904 | &size); | |
4905 | if (*outbuf) | |
4906 | return size; | |
4907 | } | |
4908 | ||
4909 | *outbuf = run_textconv(driver->textconv, df, &size); | |
840383b2 JK |
4910 | if (!*outbuf) |
4911 | die("unable to read files to diff"); | |
d9bae1a1 | 4912 | |
9ec09b04 | 4913 | if (driver->textconv_cache && df->sha1_valid) { |
d9bae1a1 JK |
4914 | /* ignore errors, as we might be in a readonly repository */ |
4915 | notes_cache_put(driver->textconv_cache, df->sha1, *outbuf, | |
4916 | size); | |
4917 | /* | |
4918 | * we could save up changes and flush them all at the end, | |
4919 | * but we would need an extra call after all diffing is done. | |
4920 | * Since generating a cache entry is the slow path anyway, | |
4921 | * this extra overhead probably isn't a big deal. | |
4922 | */ | |
4923 | notes_cache_write(driver->textconv_cache); | |
4924 | } | |
4925 | ||
840383b2 JK |
4926 | return size; |
4927 | } | |
4914c962 NTND |
4928 | |
4929 | void setup_diff_pager(struct diff_options *opt) | |
4930 | { | |
4931 | /* | |
4932 | * If the user asked for our exit code, then either they want --quiet | |
4933 | * or --exit-code. We should definitely not bother with a pager in the | |
4934 | * former case, as we will generate no output. Since we still properly | |
4935 | * report our exit code even when a pager is run, we _could_ run a | |
4936 | * pager with --exit-code. But since we have not done so historically, | |
4937 | * and because it is easy to find people oneline advising "git diff | |
4938 | * --exit-code" in hooks and other scripts, we do not do so. | |
4939 | */ | |
4940 | if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
4941 | check_pager_config("diff") != 0) | |
4942 | setup_pager(); | |
4943 | } |