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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" |
6973dcae | 18 | |
1510fea7 SP |
19 | #ifdef NO_FAST_WORKING_DIRECTORY |
20 | #define FAST_WORKING_DIRECTORY 0 | |
21 | #else | |
22 | #define FAST_WORKING_DIRECTORY 1 | |
23 | #endif | |
24 | ||
96f1e58f | 25 | static int diff_detect_rename_default; |
92c57e5c | 26 | static int diff_rename_limit_default = 400; |
a624eaa7 | 27 | static int diff_suppress_blank_empty; |
6b2f2d98 | 28 | int diff_use_color_default = -1; |
98a4d87b | 29 | static const char *diff_word_regex_cfg; |
cbe02100 | 30 | static const char *external_diff_cmd_cfg; |
aecbf914 | 31 | int diff_auto_refresh_index = 1; |
a5a818ee | 32 | static int diff_mnemonic_prefix; |
f89504dd | 33 | static int diff_no_prefix; |
712d2c7d | 34 | static int diff_dirstat_permille_default = 30; |
be4f2b40 | 35 | static struct diff_options default_diff_options; |
6973dcae | 36 | |
7c92fe0e | 37 | static char diff_colors[][COLOR_MAXLEN] = { |
dc6ebd4c AL |
38 | GIT_COLOR_RESET, |
39 | GIT_COLOR_NORMAL, /* PLAIN */ | |
40 | GIT_COLOR_BOLD, /* METAINFO */ | |
41 | GIT_COLOR_CYAN, /* FRAGINFO */ | |
42 | GIT_COLOR_RED, /* OLD */ | |
43 | GIT_COLOR_GREEN, /* NEW */ | |
44 | GIT_COLOR_YELLOW, /* COMMIT */ | |
45 | GIT_COLOR_BG_RED, /* WHITESPACE */ | |
89cb73a1 | 46 | GIT_COLOR_NORMAL, /* FUNCINFO */ |
cd112cef JS |
47 | }; |
48 | ||
801235c5 JH |
49 | static int parse_diff_color_slot(const char *var, int ofs) |
50 | { | |
51 | if (!strcasecmp(var+ofs, "plain")) | |
52 | return DIFF_PLAIN; | |
53 | if (!strcasecmp(var+ofs, "meta")) | |
54 | return DIFF_METAINFO; | |
55 | if (!strcasecmp(var+ofs, "frag")) | |
56 | return DIFF_FRAGINFO; | |
57 | if (!strcasecmp(var+ofs, "old")) | |
58 | return DIFF_FILE_OLD; | |
59 | if (!strcasecmp(var+ofs, "new")) | |
60 | return DIFF_FILE_NEW; | |
ce436973 JK |
61 | if (!strcasecmp(var+ofs, "commit")) |
62 | return DIFF_COMMIT; | |
448c3ef1 JH |
63 | if (!strcasecmp(var+ofs, "whitespace")) |
64 | return DIFF_WHITESPACE; | |
89cb73a1 BW |
65 | if (!strcasecmp(var+ofs, "func")) |
66 | return DIFF_FUNCINFO; | |
8b8e8624 | 67 | return -1; |
801235c5 JH |
68 | } |
69 | ||
51670fc8 JH |
70 | static int parse_dirstat_params(struct diff_options *options, const char *params, |
71 | struct strbuf *errmsg) | |
333f3fb0 JH |
72 | { |
73 | const char *p = params; | |
51670fc8 JH |
74 | int p_len, ret = 0; |
75 | ||
333f3fb0 | 76 | while (*p) { |
51670fc8 JH |
77 | p_len = strchrnul(p, ',') - p; |
78 | if (!memcmp(p, "changes", p_len)) { | |
1c57a627 JH |
79 | DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); |
80 | DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); | |
51670fc8 | 81 | } else if (!memcmp(p, "lines", p_len)) { |
1c57a627 | 82 | DIFF_OPT_SET(options, DIRSTAT_BY_LINE); |
333f3fb0 | 83 | DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); |
51670fc8 | 84 | } else if (!memcmp(p, "files", p_len)) { |
1c57a627 | 85 | DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); |
333f3fb0 | 86 | DIFF_OPT_SET(options, DIRSTAT_BY_FILE); |
51670fc8 | 87 | } else if (!memcmp(p, "noncumulative", p_len)) { |
333f3fb0 | 88 | DIFF_OPT_CLR(options, DIRSTAT_CUMULATIVE); |
51670fc8 | 89 | } else if (!memcmp(p, "cumulative", p_len)) { |
333f3fb0 JH |
90 | DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE); |
91 | } else if (isdigit(*p)) { | |
92 | char *end; | |
51670fc8 JH |
93 | int permille = strtoul(p, &end, 10) * 10; |
94 | if (*end == '.' && isdigit(*++end)) { | |
712d2c7d | 95 | /* only use first digit */ |
51670fc8 | 96 | permille += *end - '0'; |
712d2c7d | 97 | /* .. and ignore any further digits */ |
51670fc8 | 98 | while (isdigit(*++end)) |
712d2c7d JH |
99 | ; /* nothing */ |
100 | } | |
51670fc8 JH |
101 | if (end - p == p_len) |
102 | options->dirstat_permille = permille; | |
103 | else { | |
7478ac57 | 104 | strbuf_addf(errmsg, _(" Failed to parse dirstat cut-off percentage '%.*s'\n"), |
51670fc8 JH |
105 | p_len, p); |
106 | ret++; | |
107 | } | |
108 | } else { | |
7478ac57 | 109 | strbuf_addf(errmsg, _(" Unknown dirstat parameter '%.*s'\n"), |
51670fc8 JH |
110 | p_len, p); |
111 | ret++; | |
333f3fb0 | 112 | } |
51670fc8 JH |
113 | |
114 | p += p_len; | |
115 | ||
116 | if (*p) | |
117 | p++; /* more parameters, swallow separator */ | |
333f3fb0 | 118 | } |
51670fc8 | 119 | return ret; |
333f3fb0 JH |
120 | } |
121 | ||
cced5fbc LT |
122 | static int git_config_rename(const char *var, const char *value) |
123 | { | |
124 | if (!value) | |
125 | return DIFF_DETECT_RENAME; | |
126 | if (!strcasecmp(value, "copies") || !strcasecmp(value, "copy")) | |
127 | return DIFF_DETECT_COPY; | |
128 | return git_config_bool(var,value) ? DIFF_DETECT_RENAME : 0; | |
129 | } | |
130 | ||
83ad63cf JH |
131 | /* |
132 | * These are to give UI layer defaults. | |
133 | * The core-level commands such as git-diff-files should | |
134 | * never be affected by the setting of diff.renames | |
135 | * the user happens to have in the configuration file. | |
136 | */ | |
ef90d6d4 | 137 | int git_diff_ui_config(const char *var, const char *value, void *cb) |
801235c5 | 138 | { |
a159ca0c | 139 | if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) { |
0f6f5a40 | 140 | diff_use_color_default = git_config_colorbool(var, value, -1); |
801235c5 JH |
141 | return 0; |
142 | } | |
b68ea12e | 143 | if (!strcmp(var, "diff.renames")) { |
cced5fbc | 144 | diff_detect_rename_default = git_config_rename(var, value); |
b68ea12e EW |
145 | return 0; |
146 | } | |
aecbf914 JH |
147 | if (!strcmp(var, "diff.autorefreshindex")) { |
148 | diff_auto_refresh_index = git_config_bool(var, value); | |
149 | return 0; | |
150 | } | |
a5a818ee JH |
151 | if (!strcmp(var, "diff.mnemonicprefix")) { |
152 | diff_mnemonic_prefix = git_config_bool(var, value); | |
153 | return 0; | |
154 | } | |
f89504dd EC |
155 | if (!strcmp(var, "diff.noprefix")) { |
156 | diff_no_prefix = git_config_bool(var, value); | |
157 | return 0; | |
158 | } | |
daec808c BH |
159 | if (!strcmp(var, "diff.external")) |
160 | return git_config_string(&external_diff_cmd_cfg, var, value); | |
98a4d87b BSSJ |
161 | if (!strcmp(var, "diff.wordregex")) |
162 | return git_config_string(&diff_word_regex_cfg, var, value); | |
f1af60bd | 163 | |
be4f2b40 JS |
164 | if (!strcmp(var, "diff.ignoresubmodules")) |
165 | handle_ignore_submodules_arg(&default_diff_options, value); | |
166 | ||
ef90d6d4 | 167 | return git_diff_basic_config(var, value, cb); |
9a1805a8 JK |
168 | } |
169 | ||
ef90d6d4 | 170 | int git_diff_basic_config(const char *var, const char *value, void *cb) |
9a1805a8 | 171 | { |
2b6ca6df LT |
172 | if (!strcmp(var, "diff.renamelimit")) { |
173 | diff_rename_limit_default = git_config_int(var, value); | |
174 | return 0; | |
175 | } | |
176 | ||
c7534ef4 JK |
177 | switch (userdiff_config(var, value)) { |
178 | case 0: break; | |
179 | case -1: return -1; | |
180 | default: return 0; | |
181 | } | |
182 | ||
1968d77d | 183 | if (!prefixcmp(var, "diff.color.") || !prefixcmp(var, "color.diff.")) { |
801235c5 | 184 | int slot = parse_diff_color_slot(var, 11); |
8b8e8624 JK |
185 | if (slot < 0) |
186 | return 0; | |
64f30e94 JH |
187 | if (!value) |
188 | return config_error_nonbool(var); | |
7c92fe0e | 189 | color_parse(value, var, diff_colors[slot]); |
801235c5 JH |
190 | return 0; |
191 | } | |
f1af60bd | 192 | |
a624eaa7 | 193 | /* like GNU diff's --suppress-blank-empty option */ |
950db879 JS |
194 | if (!strcmp(var, "diff.suppressblankempty") || |
195 | /* for backwards compatibility */ | |
196 | !strcmp(var, "diff.suppress-blank-empty")) { | |
a624eaa7 JM |
197 | diff_suppress_blank_empty = git_config_bool(var, value); |
198 | return 0; | |
199 | } | |
200 | ||
2d174951 | 201 | if (!strcmp(var, "diff.dirstat")) { |
51670fc8 | 202 | struct strbuf errmsg = STRBUF_INIT; |
712d2c7d | 203 | default_diff_options.dirstat_permille = diff_dirstat_permille_default; |
51670fc8 | 204 | if (parse_dirstat_params(&default_diff_options, value, &errmsg)) |
7478ac57 | 205 | warning(_("Found errors in 'diff.dirstat' config variable:\n%s"), |
51670fc8 JH |
206 | errmsg.buf); |
207 | strbuf_release(&errmsg); | |
712d2c7d | 208 | diff_dirstat_permille_default = default_diff_options.dirstat_permille; |
2d174951 JH |
209 | return 0; |
210 | } | |
211 | ||
aee9c7d6 JL |
212 | if (!prefixcmp(var, "submodule.")) |
213 | return parse_submodule_config_option(var, value); | |
214 | ||
ef90d6d4 | 215 | return git_color_default_config(var, value, cb); |
801235c5 JH |
216 | } |
217 | ||
6973dcae JH |
218 | static char *quote_two(const char *one, const char *two) |
219 | { | |
220 | int need_one = quote_c_style(one, NULL, NULL, 1); | |
221 | int need_two = quote_c_style(two, NULL, NULL, 1); | |
f285a2d7 | 222 | struct strbuf res = STRBUF_INIT; |
6973dcae JH |
223 | |
224 | if (need_one + need_two) { | |
663af342 PH |
225 | strbuf_addch(&res, '"'); |
226 | quote_c_style(one, &res, NULL, 1); | |
227 | quote_c_style(two, &res, NULL, 1); | |
228 | strbuf_addch(&res, '"'); | |
229 | } else { | |
230 | strbuf_addstr(&res, one); | |
231 | strbuf_addstr(&res, two); | |
6973dcae | 232 | } |
b315c5c0 | 233 | return strbuf_detach(&res, NULL); |
6973dcae JH |
234 | } |
235 | ||
236 | static const char *external_diff(void) | |
237 | { | |
238 | static const char *external_diff_cmd = NULL; | |
239 | static int done_preparing = 0; | |
240 | ||
241 | if (done_preparing) | |
242 | return external_diff_cmd; | |
243 | external_diff_cmd = getenv("GIT_EXTERNAL_DIFF"); | |
cbe02100 JS |
244 | if (!external_diff_cmd) |
245 | external_diff_cmd = external_diff_cmd_cfg; | |
6973dcae JH |
246 | done_preparing = 1; |
247 | return external_diff_cmd; | |
248 | } | |
249 | ||
6973dcae JH |
250 | static struct diff_tempfile { |
251 | const char *name; /* filename external diff should read from */ | |
252 | char hex[41]; | |
253 | char mode[10]; | |
1472966c | 254 | char tmp_path[PATH_MAX]; |
6973dcae JH |
255 | } diff_temp[2]; |
256 | ||
6957eb9a JH |
257 | typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len); |
258 | ||
259 | struct emit_callback { | |
6957eb9a JH |
260 | int color_diff; |
261 | unsigned ws_rule; | |
262 | int blank_at_eof_in_preimage; | |
263 | int blank_at_eof_in_postimage; | |
264 | int lno_in_preimage; | |
265 | int lno_in_postimage; | |
266 | sane_truncate_fn truncate; | |
267 | const char **label_path; | |
268 | struct diff_words_data *diff_words; | |
a3c158d4 | 269 | struct diff_options *opt; |
6957eb9a | 270 | int *found_changesp; |
3e97c7c6 | 271 | struct strbuf *header; |
6957eb9a JH |
272 | }; |
273 | ||
6973dcae JH |
274 | static int count_lines(const char *data, int size) |
275 | { | |
276 | int count, ch, completely_empty = 1, nl_just_seen = 0; | |
277 | count = 0; | |
278 | while (0 < size--) { | |
279 | ch = *data++; | |
280 | if (ch == '\n') { | |
281 | count++; | |
282 | nl_just_seen = 1; | |
283 | completely_empty = 0; | |
284 | } | |
285 | else { | |
286 | nl_just_seen = 0; | |
287 | completely_empty = 0; | |
288 | } | |
289 | } | |
290 | if (completely_empty) | |
291 | return 0; | |
292 | if (!nl_just_seen) | |
293 | count++; /* no trailing newline */ | |
294 | return count; | |
295 | } | |
296 | ||
6957eb9a JH |
297 | static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) |
298 | { | |
299 | if (!DIFF_FILE_VALID(one)) { | |
300 | mf->ptr = (char *)""; /* does not matter */ | |
301 | mf->size = 0; | |
302 | return 0; | |
303 | } | |
304 | else if (diff_populate_filespec(one, 0)) | |
305 | return -1; | |
bb35fefb | 306 | |
6957eb9a JH |
307 | mf->ptr = one->data; |
308 | mf->size = one->size; | |
309 | return 0; | |
310 | } | |
311 | ||
abb371a1 JK |
312 | /* like fill_mmfile, but only for size, so we can avoid retrieving blob */ |
313 | static unsigned long diff_filespec_size(struct diff_filespec *one) | |
314 | { | |
315 | if (!DIFF_FILE_VALID(one)) | |
316 | return 0; | |
317 | diff_populate_filespec(one, 1); | |
318 | return one->size; | |
319 | } | |
320 | ||
6957eb9a JH |
321 | static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule) |
322 | { | |
323 | char *ptr = mf->ptr; | |
324 | long size = mf->size; | |
325 | int cnt = 0; | |
326 | ||
327 | if (!size) | |
328 | return cnt; | |
329 | ptr += size - 1; /* pointing at the very end */ | |
330 | if (*ptr != '\n') | |
331 | ; /* incomplete line */ | |
332 | else | |
333 | ptr--; /* skip the last LF */ | |
334 | while (mf->ptr < ptr) { | |
335 | char *prev_eol; | |
336 | for (prev_eol = ptr; mf->ptr <= prev_eol; prev_eol--) | |
337 | if (*prev_eol == '\n') | |
338 | break; | |
339 | if (!ws_blank_line(prev_eol + 1, ptr - prev_eol, ws_rule)) | |
340 | break; | |
341 | cnt++; | |
342 | ptr = prev_eol - 1; | |
343 | } | |
344 | return cnt; | |
345 | } | |
346 | ||
347 | static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2, | |
348 | struct emit_callback *ecbdata) | |
349 | { | |
350 | int l1, l2, at; | |
351 | unsigned ws_rule = ecbdata->ws_rule; | |
352 | l1 = count_trailing_blank(mf1, ws_rule); | |
353 | l2 = count_trailing_blank(mf2, ws_rule); | |
354 | if (l2 <= l1) { | |
355 | ecbdata->blank_at_eof_in_preimage = 0; | |
356 | ecbdata->blank_at_eof_in_postimage = 0; | |
357 | return; | |
358 | } | |
359 | at = count_lines(mf1->ptr, mf1->size); | |
360 | ecbdata->blank_at_eof_in_preimage = (at - l1) + 1; | |
361 | ||
362 | at = count_lines(mf2->ptr, mf2->size); | |
363 | ecbdata->blank_at_eof_in_postimage = (at - l2) + 1; | |
364 | } | |
365 | ||
a3c158d4 | 366 | static void emit_line_0(struct diff_options *o, const char *set, const char *reset, |
250f7993 | 367 | int first, const char *line, int len) |
6957eb9a JH |
368 | { |
369 | int has_trailing_newline, has_trailing_carriage_return; | |
250f7993 | 370 | int nofirst; |
a3c158d4 BY |
371 | FILE *file = o->file; |
372 | ||
373 | if (o->output_prefix) { | |
374 | struct strbuf *msg = NULL; | |
375 | msg = o->output_prefix(o, o->output_prefix_data); | |
376 | assert(msg); | |
377 | fwrite(msg->buf, msg->len, 1, file); | |
378 | } | |
6957eb9a | 379 | |
250f7993 JH |
380 | if (len == 0) { |
381 | has_trailing_newline = (first == '\n'); | |
382 | has_trailing_carriage_return = (!has_trailing_newline && | |
383 | (first == '\r')); | |
384 | nofirst = has_trailing_newline || has_trailing_carriage_return; | |
385 | } else { | |
386 | has_trailing_newline = (len > 0 && line[len-1] == '\n'); | |
387 | if (has_trailing_newline) | |
388 | len--; | |
389 | has_trailing_carriage_return = (len > 0 && line[len-1] == '\r'); | |
390 | if (has_trailing_carriage_return) | |
391 | len--; | |
392 | nofirst = 0; | |
393 | } | |
6957eb9a | 394 | |
06a47552 JH |
395 | if (len || !nofirst) { |
396 | fputs(set, file); | |
397 | if (!nofirst) | |
398 | fputc(first, file); | |
399 | fwrite(line, len, 1, file); | |
400 | fputs(reset, file); | |
401 | } | |
6957eb9a JH |
402 | if (has_trailing_carriage_return) |
403 | fputc('\r', file); | |
404 | if (has_trailing_newline) | |
405 | fputc('\n', file); | |
406 | } | |
407 | ||
a3c158d4 | 408 | static void emit_line(struct diff_options *o, const char *set, const char *reset, |
250f7993 JH |
409 | const char *line, int len) |
410 | { | |
a3c158d4 | 411 | emit_line_0(o, set, reset, line[0], line+1, len-1); |
250f7993 JH |
412 | } |
413 | ||
6957eb9a JH |
414 | static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len) |
415 | { | |
416 | if (!((ecbdata->ws_rule & WS_BLANK_AT_EOF) && | |
417 | ecbdata->blank_at_eof_in_preimage && | |
418 | ecbdata->blank_at_eof_in_postimage && | |
419 | ecbdata->blank_at_eof_in_preimage <= ecbdata->lno_in_preimage && | |
420 | ecbdata->blank_at_eof_in_postimage <= ecbdata->lno_in_postimage)) | |
421 | return 0; | |
018cff70 | 422 | return ws_blank_line(line, len, ecbdata->ws_rule); |
6957eb9a JH |
423 | } |
424 | ||
018cff70 JH |
425 | static void emit_add_line(const char *reset, |
426 | struct emit_callback *ecbdata, | |
427 | const char *line, int len) | |
6957eb9a JH |
428 | { |
429 | const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE); | |
430 | const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW); | |
431 | ||
432 | if (!*ws) | |
a3c158d4 | 433 | emit_line_0(ecbdata->opt, set, reset, '+', line, len); |
6957eb9a JH |
434 | else if (new_blank_line_at_eof(ecbdata, line, len)) |
435 | /* Blank line at EOF - paint '+' as well */ | |
a3c158d4 | 436 | emit_line_0(ecbdata->opt, ws, reset, '+', line, len); |
6957eb9a JH |
437 | else { |
438 | /* Emit just the prefix, then the rest. */ | |
a3c158d4 | 439 | emit_line_0(ecbdata->opt, set, reset, '+', "", 0); |
018cff70 | 440 | ws_check_emit(line, len, ecbdata->ws_rule, |
a3c158d4 | 441 | ecbdata->opt->file, set, reset, ws); |
6957eb9a JH |
442 | } |
443 | } | |
444 | ||
89cb73a1 BW |
445 | static void emit_hunk_header(struct emit_callback *ecbdata, |
446 | const char *line, int len) | |
447 | { | |
448 | const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); | |
449 | const char *frag = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO); | |
450 | const char *func = diff_get_color(ecbdata->color_diff, DIFF_FUNCINFO); | |
451 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); | |
452 | static const char atat[2] = { '@', '@' }; | |
453 | const char *cp, *ep; | |
2efcc977 BY |
454 | struct strbuf msgbuf = STRBUF_INIT; |
455 | int org_len = len; | |
456 | int i = 1; | |
89cb73a1 BW |
457 | |
458 | /* | |
459 | * As a hunk header must begin with "@@ -<old>, +<new> @@", | |
460 | * it always is at least 10 bytes long. | |
461 | */ | |
462 | if (len < 10 || | |
463 | memcmp(line, atat, 2) || | |
464 | !(ep = memmem(line + 2, len - 2, atat, 2))) { | |
a3c158d4 | 465 | emit_line(ecbdata->opt, plain, reset, line, len); |
89cb73a1 BW |
466 | return; |
467 | } | |
468 | ep += 2; /* skip over @@ */ | |
469 | ||
470 | /* The hunk header in fraginfo color */ | |
2efcc977 BY |
471 | strbuf_add(&msgbuf, frag, strlen(frag)); |
472 | strbuf_add(&msgbuf, line, ep - line); | |
473 | strbuf_add(&msgbuf, reset, strlen(reset)); | |
474 | ||
475 | /* | |
476 | * trailing "\r\n" | |
477 | */ | |
478 | for ( ; i < 3; i++) | |
479 | if (line[len - i] == '\r' || line[len - i] == '\n') | |
480 | len--; | |
89cb73a1 BW |
481 | |
482 | /* blank before the func header */ | |
483 | for (cp = ep; ep - line < len; ep++) | |
484 | if (*ep != ' ' && *ep != '\t') | |
485 | break; | |
2efcc977 BY |
486 | if (ep != cp) { |
487 | strbuf_add(&msgbuf, plain, strlen(plain)); | |
488 | strbuf_add(&msgbuf, cp, ep - cp); | |
489 | strbuf_add(&msgbuf, reset, strlen(reset)); | |
490 | } | |
491 | ||
492 | if (ep < line + len) { | |
493 | strbuf_add(&msgbuf, func, strlen(func)); | |
494 | strbuf_add(&msgbuf, ep, line + len - ep); | |
495 | strbuf_add(&msgbuf, reset, strlen(reset)); | |
496 | } | |
89cb73a1 | 497 | |
2efcc977 BY |
498 | strbuf_add(&msgbuf, line + len, org_len - len); |
499 | emit_line(ecbdata->opt, "", "", msgbuf.buf, msgbuf.len); | |
500 | strbuf_release(&msgbuf); | |
89cb73a1 BW |
501 | } |
502 | ||
479b0ae8 JK |
503 | static struct diff_tempfile *claim_diff_tempfile(void) { |
504 | int i; | |
505 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) | |
506 | if (!diff_temp[i].name) | |
507 | return diff_temp + i; | |
508 | die("BUG: diff is failing to clean up its tempfiles"); | |
509 | } | |
510 | ||
511 | static int remove_tempfile_installed; | |
512 | ||
513 | static void remove_tempfile(void) | |
514 | { | |
515 | int i; | |
a8344abe NR |
516 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) { |
517 | if (diff_temp[i].name == diff_temp[i].tmp_path) | |
691f1a28 | 518 | unlink_or_warn(diff_temp[i].name); |
a8344abe NR |
519 | diff_temp[i].name = NULL; |
520 | } | |
479b0ae8 JK |
521 | } |
522 | ||
523 | static void remove_tempfile_on_signal(int signo) | |
524 | { | |
525 | remove_tempfile(); | |
4a16d072 | 526 | sigchain_pop(signo); |
479b0ae8 JK |
527 | raise(signo); |
528 | } | |
529 | ||
c0c77734 | 530 | static void print_line_count(FILE *file, int count) |
6973dcae JH |
531 | { |
532 | switch (count) { | |
533 | case 0: | |
c0c77734 | 534 | fprintf(file, "0,0"); |
6973dcae JH |
535 | break; |
536 | case 1: | |
c0c77734 | 537 | fprintf(file, "1"); |
6973dcae JH |
538 | break; |
539 | default: | |
c0c77734 | 540 | fprintf(file, "1,%d", count); |
6973dcae JH |
541 | break; |
542 | } | |
543 | } | |
544 | ||
7f7ee2ff JH |
545 | static void emit_rewrite_lines(struct emit_callback *ecb, |
546 | int prefix, const char *data, int size) | |
6973dcae | 547 | { |
7f7ee2ff JH |
548 | const char *endp = NULL; |
549 | static const char *nneof = " No newline at end of file\n"; | |
550 | const char *old = diff_get_color(ecb->color_diff, DIFF_FILE_OLD); | |
551 | const char *reset = diff_get_color(ecb->color_diff, DIFF_RESET); | |
552 | ||
553 | while (0 < size) { | |
554 | int len; | |
555 | ||
556 | endp = memchr(data, '\n', size); | |
557 | len = endp ? (endp - data + 1) : size; | |
558 | if (prefix != '+') { | |
559 | ecb->lno_in_preimage++; | |
a3c158d4 | 560 | emit_line_0(ecb->opt, old, reset, '-', |
7f7ee2ff JH |
561 | data, len); |
562 | } else { | |
563 | ecb->lno_in_postimage++; | |
564 | emit_add_line(reset, ecb, data, len); | |
13e36ec5 | 565 | } |
7f7ee2ff JH |
566 | size -= len; |
567 | data += len; | |
568 | } | |
569 | if (!endp) { | |
570 | const char *plain = diff_get_color(ecb->color_diff, | |
571 | DIFF_PLAIN); | |
a3c158d4 | 572 | emit_line_0(ecb->opt, plain, reset, '\\', |
7f7ee2ff | 573 | nneof, strlen(nneof)); |
6973dcae | 574 | } |
6973dcae JH |
575 | } |
576 | ||
577 | static void emit_rewrite_diff(const char *name_a, | |
578 | const char *name_b, | |
579 | struct diff_filespec *one, | |
13e36ec5 | 580 | struct diff_filespec *two, |
d9bae1a1 JK |
581 | struct userdiff_driver *textconv_one, |
582 | struct userdiff_driver *textconv_two, | |
eab9a40b | 583 | struct diff_options *o) |
6973dcae JH |
584 | { |
585 | int lc_a, lc_b; | |
eab9a40b | 586 | int color_diff = DIFF_OPT_TST(o, COLOR_DIFF); |
1a9eb3b9 | 587 | const char *name_a_tab, *name_b_tab; |
13e36ec5 JS |
588 | const char *metainfo = diff_get_color(color_diff, DIFF_METAINFO); |
589 | const char *fraginfo = diff_get_color(color_diff, DIFF_FRAGINFO); | |
13e36ec5 | 590 | const char *reset = diff_get_color(color_diff, DIFF_RESET); |
d5625091 | 591 | static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT; |
a5a818ee | 592 | const char *a_prefix, *b_prefix; |
840383b2 | 593 | char *data_one, *data_two; |
3aa1f7ca | 594 | size_t size_one, size_two; |
7f7ee2ff | 595 | struct emit_callback ecbdata; |
7be57610 BY |
596 | char *line_prefix = ""; |
597 | struct strbuf *msgbuf; | |
598 | ||
599 | if (o && o->output_prefix) { | |
600 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
601 | line_prefix = msgbuf->buf; | |
602 | } | |
a5a818ee JH |
603 | |
604 | if (diff_mnemonic_prefix && DIFF_OPT_TST(o, REVERSE_DIFF)) { | |
605 | a_prefix = o->b_prefix; | |
606 | b_prefix = o->a_prefix; | |
607 | } else { | |
608 | a_prefix = o->a_prefix; | |
609 | b_prefix = o->b_prefix; | |
610 | } | |
1a9eb3b9 | 611 | |
8a13becc JH |
612 | name_a += (*name_a == '/'); |
613 | name_b += (*name_b == '/'); | |
1a9eb3b9 JH |
614 | name_a_tab = strchr(name_a, ' ') ? "\t" : ""; |
615 | name_b_tab = strchr(name_b, ' ') ? "\t" : ""; | |
616 | ||
d5625091 JH |
617 | strbuf_reset(&a_name); |
618 | strbuf_reset(&b_name); | |
a5a818ee JH |
619 | quote_two_c_style(&a_name, a_prefix, name_a, 0); |
620 | quote_two_c_style(&b_name, b_prefix, name_b, 0); | |
d5625091 | 621 | |
840383b2 JK |
622 | size_one = fill_textconv(textconv_one, one, &data_one); |
623 | size_two = fill_textconv(textconv_two, two, &data_two); | |
3aa1f7ca | 624 | |
d91ba8fa JH |
625 | memset(&ecbdata, 0, sizeof(ecbdata)); |
626 | ecbdata.color_diff = color_diff; | |
627 | ecbdata.found_changesp = &o->found_changes; | |
628 | ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a); | |
a3c158d4 | 629 | ecbdata.opt = o; |
d91ba8fa JH |
630 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) { |
631 | mmfile_t mf1, mf2; | |
632 | mf1.ptr = (char *)data_one; | |
633 | mf2.ptr = (char *)data_two; | |
634 | mf1.size = size_one; | |
635 | mf2.size = size_two; | |
636 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
637 | } | |
638 | ecbdata.lno_in_preimage = 1; | |
639 | ecbdata.lno_in_postimage = 1; | |
640 | ||
3aa1f7ca JK |
641 | lc_a = count_lines(data_one, size_one); |
642 | lc_b = count_lines(data_two, size_two); | |
c0c77734 | 643 | fprintf(o->file, |
7be57610 BY |
644 | "%s%s--- %s%s%s\n%s%s+++ %s%s%s\n%s%s@@ -", |
645 | line_prefix, metainfo, a_name.buf, name_a_tab, reset, | |
646 | line_prefix, metainfo, b_name.buf, name_b_tab, reset, | |
647 | line_prefix, fraginfo); | |
467ddc14 JH |
648 | if (!o->irreversible_delete) |
649 | print_line_count(o->file, lc_a); | |
650 | else | |
651 | fprintf(o->file, "?,?"); | |
c0c77734 DB |
652 | fprintf(o->file, " +"); |
653 | print_line_count(o->file, lc_b); | |
654 | fprintf(o->file, " @@%s\n", reset); | |
467ddc14 | 655 | if (lc_a && !o->irreversible_delete) |
d91ba8fa | 656 | emit_rewrite_lines(&ecbdata, '-', data_one, size_one); |
6973dcae | 657 | if (lc_b) |
d91ba8fa | 658 | emit_rewrite_lines(&ecbdata, '+', data_two, size_two); |
b76c056b | 659 | if (textconv_one) |
aed6ca52 | 660 | free((char *)data_one); |
b76c056b | 661 | if (textconv_two) |
aed6ca52 | 662 | free((char *)data_two); |
6973dcae JH |
663 | } |
664 | ||
f59a59e2 JS |
665 | struct diff_words_buffer { |
666 | mmfile_t text; | |
667 | long alloc; | |
2e5d2003 JS |
668 | struct diff_words_orig { |
669 | const char *begin, *end; | |
670 | } *orig; | |
671 | int orig_nr, orig_alloc; | |
f59a59e2 JS |
672 | }; |
673 | ||
674 | static void diff_words_append(char *line, unsigned long len, | |
675 | struct diff_words_buffer *buffer) | |
676 | { | |
23c1575f | 677 | ALLOC_GROW(buffer->text.ptr, buffer->text.size + len, buffer->alloc); |
f59a59e2 JS |
678 | line++; |
679 | len--; | |
680 | memcpy(buffer->text.ptr + buffer->text.size, line, len); | |
681 | buffer->text.size += len; | |
2b6a5417 | 682 | buffer->text.ptr[buffer->text.size] = '\0'; |
f59a59e2 JS |
683 | } |
684 | ||
9cba13ca | 685 | struct diff_words_style_elem { |
882749a0 TR |
686 | const char *prefix; |
687 | const char *suffix; | |
688 | const char *color; /* NULL; filled in by the setup code if | |
689 | * color is enabled */ | |
690 | }; | |
691 | ||
9cba13ca | 692 | struct diff_words_style { |
882749a0 TR |
693 | enum diff_words_type type; |
694 | struct diff_words_style_elem new, old, ctx; | |
695 | const char *newline; | |
696 | }; | |
697 | ||
c2e86add | 698 | static struct diff_words_style diff_words_styles[] = { |
882749a0 TR |
699 | { DIFF_WORDS_PORCELAIN, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" }, |
700 | { DIFF_WORDS_PLAIN, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" }, | |
701 | { DIFF_WORDS_COLOR, {"", ""}, {"", ""}, {"", ""}, "\n" } | |
702 | }; | |
703 | ||
f59a59e2 | 704 | struct diff_words_data { |
f59a59e2 | 705 | struct diff_words_buffer minus, plus; |
2e5d2003 | 706 | const char *current_plus; |
4297c0ae BY |
707 | int last_minus; |
708 | struct diff_options *opt; | |
2b6a5417 | 709 | regex_t *word_regex; |
882749a0 TR |
710 | enum diff_words_type type; |
711 | struct diff_words_style *style; | |
f59a59e2 JS |
712 | }; |
713 | ||
882749a0 TR |
714 | static int fn_out_diff_words_write_helper(FILE *fp, |
715 | struct diff_words_style_elem *st_el, | |
716 | const char *newline, | |
4297c0ae BY |
717 | size_t count, const char *buf, |
718 | const char *line_prefix) | |
882749a0 | 719 | { |
4297c0ae BY |
720 | int print = 0; |
721 | ||
882749a0 TR |
722 | while (count) { |
723 | char *p = memchr(buf, '\n', count); | |
4297c0ae BY |
724 | if (print) |
725 | fputs(line_prefix, fp); | |
882749a0 TR |
726 | if (p != buf) { |
727 | if (st_el->color && fputs(st_el->color, fp) < 0) | |
728 | return -1; | |
729 | if (fputs(st_el->prefix, fp) < 0 || | |
730 | fwrite(buf, p ? p - buf : count, 1, fp) != 1 || | |
731 | fputs(st_el->suffix, fp) < 0) | |
732 | return -1; | |
733 | if (st_el->color && *st_el->color | |
734 | && fputs(GIT_COLOR_RESET, fp) < 0) | |
735 | return -1; | |
736 | } | |
737 | if (!p) | |
738 | return 0; | |
739 | if (fputs(newline, fp) < 0) | |
740 | return -1; | |
741 | count -= p + 1 - buf; | |
742 | buf = p + 1; | |
4297c0ae | 743 | print = 1; |
882749a0 TR |
744 | } |
745 | return 0; | |
746 | } | |
747 | ||
4297c0ae BY |
748 | /* |
749 | * '--color-words' algorithm can be described as: | |
750 | * | |
751 | * 1. collect a the minus/plus lines of a diff hunk, divided into | |
752 | * minus-lines and plus-lines; | |
753 | * | |
754 | * 2. break both minus-lines and plus-lines into words and | |
755 | * place them into two mmfile_t with one word for each line; | |
756 | * | |
757 | * 3. use xdiff to run diff on the two mmfile_t to get the words level diff; | |
758 | * | |
759 | * And for the common parts of the both file, we output the plus side text. | |
760 | * diff_words->current_plus is used to trace the current position of the plus file | |
761 | * which printed. diff_words->last_minus is used to trace the last minus word | |
762 | * printed. | |
763 | * | |
764 | * For '--graph' to work with '--color-words', we need to output the graph prefix | |
765 | * on each line of color words output. Generally, there are two conditions on | |
766 | * which we should output the prefix. | |
767 | * | |
768 | * 1. diff_words->last_minus == 0 && | |
769 | * diff_words->current_plus == diff_words->plus.text.ptr | |
770 | * | |
771 | * that is: the plus text must start as a new line, and if there is no minus | |
772 | * word printed, a graph prefix must be printed. | |
773 | * | |
774 | * 2. diff_words->current_plus > diff_words->plus.text.ptr && | |
775 | * *(diff_words->current_plus - 1) == '\n' | |
776 | * | |
777 | * that is: a graph prefix must be printed following a '\n' | |
778 | */ | |
779 | static int color_words_output_graph_prefix(struct diff_words_data *diff_words) | |
780 | { | |
781 | if ((diff_words->last_minus == 0 && | |
782 | diff_words->current_plus == diff_words->plus.text.ptr) || | |
783 | (diff_words->current_plus > diff_words->plus.text.ptr && | |
784 | *(diff_words->current_plus - 1) == '\n')) { | |
785 | return 1; | |
786 | } else { | |
787 | return 0; | |
788 | } | |
789 | } | |
790 | ||
f59a59e2 | 791 | static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) |
f59a59e2 | 792 | { |
f59a59e2 | 793 | struct diff_words_data *diff_words = priv; |
882749a0 | 794 | struct diff_words_style *style = diff_words->style; |
2e5d2003 JS |
795 | int minus_first, minus_len, plus_first, plus_len; |
796 | const char *minus_begin, *minus_end, *plus_begin, *plus_end; | |
4297c0ae BY |
797 | struct diff_options *opt = diff_words->opt; |
798 | struct strbuf *msgbuf; | |
799 | char *line_prefix = ""; | |
f59a59e2 | 800 | |
2e5d2003 JS |
801 | if (line[0] != '@' || parse_hunk_header(line, len, |
802 | &minus_first, &minus_len, &plus_first, &plus_len)) | |
f59a59e2 JS |
803 | return; |
804 | ||
4297c0ae BY |
805 | assert(opt); |
806 | if (opt->output_prefix) { | |
807 | msgbuf = opt->output_prefix(opt, opt->output_prefix_data); | |
808 | line_prefix = msgbuf->buf; | |
809 | } | |
810 | ||
2e5d2003 JS |
811 | /* POSIX requires that first be decremented by one if len == 0... */ |
812 | if (minus_len) { | |
813 | minus_begin = diff_words->minus.orig[minus_first].begin; | |
814 | minus_end = | |
815 | diff_words->minus.orig[minus_first + minus_len - 1].end; | |
816 | } else | |
817 | minus_begin = minus_end = | |
818 | diff_words->minus.orig[minus_first].end; | |
819 | ||
820 | if (plus_len) { | |
821 | plus_begin = diff_words->plus.orig[plus_first].begin; | |
822 | plus_end = diff_words->plus.orig[plus_first + plus_len - 1].end; | |
823 | } else | |
824 | plus_begin = plus_end = diff_words->plus.orig[plus_first].end; | |
825 | ||
4297c0ae BY |
826 | if (color_words_output_graph_prefix(diff_words)) { |
827 | fputs(line_prefix, diff_words->opt->file); | |
828 | } | |
829 | if (diff_words->current_plus != plus_begin) { | |
830 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 TR |
831 | &style->ctx, style->newline, |
832 | plus_begin - diff_words->current_plus, | |
4297c0ae BY |
833 | diff_words->current_plus, line_prefix); |
834 | if (*(plus_begin - 1) == '\n') | |
835 | fputs(line_prefix, diff_words->opt->file); | |
836 | } | |
837 | if (minus_begin != minus_end) { | |
838 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 839 | &style->old, style->newline, |
4297c0ae BY |
840 | minus_end - minus_begin, minus_begin, |
841 | line_prefix); | |
842 | } | |
843 | if (plus_begin != plus_end) { | |
844 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 845 | &style->new, style->newline, |
4297c0ae BY |
846 | plus_end - plus_begin, plus_begin, |
847 | line_prefix); | |
848 | } | |
2e5d2003 JS |
849 | |
850 | diff_words->current_plus = plus_end; | |
4297c0ae | 851 | diff_words->last_minus = minus_first; |
f59a59e2 JS |
852 | } |
853 | ||
2b6a5417 JS |
854 | /* This function starts looking at *begin, and returns 0 iff a word was found. */ |
855 | static int find_word_boundaries(mmfile_t *buffer, regex_t *word_regex, | |
856 | int *begin, int *end) | |
857 | { | |
858 | if (word_regex && *begin < buffer->size) { | |
859 | regmatch_t match[1]; | |
860 | if (!regexec(word_regex, buffer->ptr + *begin, 1, match, 0)) { | |
861 | char *p = memchr(buffer->ptr + *begin + match[0].rm_so, | |
862 | '\n', match[0].rm_eo - match[0].rm_so); | |
863 | *end = p ? p - buffer->ptr : match[0].rm_eo + *begin; | |
864 | *begin += match[0].rm_so; | |
865 | return *begin >= *end; | |
866 | } | |
867 | return -1; | |
f59a59e2 JS |
868 | } |
869 | ||
2b6a5417 JS |
870 | /* find the next word */ |
871 | while (*begin < buffer->size && isspace(buffer->ptr[*begin])) | |
872 | (*begin)++; | |
873 | if (*begin >= buffer->size) | |
874 | return -1; | |
f59a59e2 | 875 | |
2b6a5417 JS |
876 | /* find the end of the word */ |
877 | *end = *begin + 1; | |
878 | while (*end < buffer->size && !isspace(buffer->ptr[*end])) | |
879 | (*end)++; | |
880 | ||
881 | return 0; | |
f59a59e2 JS |
882 | } |
883 | ||
23c1575f | 884 | /* |
2e5d2003 JS |
885 | * This function splits the words in buffer->text, stores the list with |
886 | * newline separator into out, and saves the offsets of the original words | |
887 | * in buffer->orig. | |
23c1575f | 888 | */ |
2b6a5417 JS |
889 | static void diff_words_fill(struct diff_words_buffer *buffer, mmfile_t *out, |
890 | regex_t *word_regex) | |
f59a59e2 | 891 | { |
2e5d2003 | 892 | int i, j; |
2b6a5417 | 893 | long alloc = 0; |
f59a59e2 | 894 | |
2e5d2003 | 895 | out->size = 0; |
2b6a5417 | 896 | out->ptr = NULL; |
f59a59e2 | 897 | |
2e5d2003 JS |
898 | /* fake an empty "0th" word */ |
899 | ALLOC_GROW(buffer->orig, 1, buffer->orig_alloc); | |
900 | buffer->orig[0].begin = buffer->orig[0].end = buffer->text.ptr; | |
901 | buffer->orig_nr = 1; | |
902 | ||
903 | for (i = 0; i < buffer->text.size; i++) { | |
2b6a5417 JS |
904 | if (find_word_boundaries(&buffer->text, word_regex, &i, &j)) |
905 | return; | |
2e5d2003 JS |
906 | |
907 | /* store original boundaries */ | |
908 | ALLOC_GROW(buffer->orig, buffer->orig_nr + 1, | |
909 | buffer->orig_alloc); | |
910 | buffer->orig[buffer->orig_nr].begin = buffer->text.ptr + i; | |
911 | buffer->orig[buffer->orig_nr].end = buffer->text.ptr + j; | |
912 | buffer->orig_nr++; | |
913 | ||
914 | /* store one word */ | |
2b6a5417 | 915 | ALLOC_GROW(out->ptr, out->size + j - i + 1, alloc); |
2e5d2003 JS |
916 | memcpy(out->ptr + out->size, buffer->text.ptr + i, j - i); |
917 | out->ptr[out->size + j - i] = '\n'; | |
918 | out->size += j - i + 1; | |
919 | ||
920 | i = j - 1; | |
f59a59e2 JS |
921 | } |
922 | } | |
923 | ||
924 | /* this executes the word diff on the accumulated buffers */ | |
925 | static void diff_words_show(struct diff_words_data *diff_words) | |
926 | { | |
927 | xpparam_t xpp; | |
928 | xdemitconf_t xecfg; | |
f59a59e2 | 929 | mmfile_t minus, plus; |
882749a0 | 930 | struct diff_words_style *style = diff_words->style; |
f59a59e2 | 931 | |
4297c0ae BY |
932 | struct diff_options *opt = diff_words->opt; |
933 | struct strbuf *msgbuf; | |
934 | char *line_prefix = ""; | |
935 | ||
936 | assert(opt); | |
937 | if (opt->output_prefix) { | |
938 | msgbuf = opt->output_prefix(opt, opt->output_prefix_data); | |
939 | line_prefix = msgbuf->buf; | |
940 | } | |
941 | ||
2e5d2003 JS |
942 | /* special case: only removal */ |
943 | if (!diff_words->plus.text.size) { | |
4297c0ae BY |
944 | fputs(line_prefix, diff_words->opt->file); |
945 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 946 | &style->old, style->newline, |
4297c0ae BY |
947 | diff_words->minus.text.size, |
948 | diff_words->minus.text.ptr, line_prefix); | |
2e5d2003 JS |
949 | diff_words->minus.text.size = 0; |
950 | return; | |
951 | } | |
952 | ||
953 | diff_words->current_plus = diff_words->plus.text.ptr; | |
4297c0ae | 954 | diff_words->last_minus = 0; |
f59a59e2 | 955 | |
9ccd0a88 | 956 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 957 | memset(&xecfg, 0, sizeof(xecfg)); |
2b6a5417 JS |
958 | diff_words_fill(&diff_words->minus, &minus, diff_words->word_regex); |
959 | diff_words_fill(&diff_words->plus, &plus, diff_words->word_regex); | |
582aa00b | 960 | xpp.flags = 0; |
2b6a5417 | 961 | /* as only the hunk header will be parsed, we need a 0-context */ |
2e5d2003 | 962 | xecfg.ctxlen = 0; |
8a3f524b | 963 | xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words, |
dfea7900 | 964 | &xpp, &xecfg); |
f59a59e2 JS |
965 | free(minus.ptr); |
966 | free(plus.ptr); | |
2e5d2003 | 967 | if (diff_words->current_plus != diff_words->plus.text.ptr + |
4297c0ae BY |
968 | diff_words->plus.text.size) { |
969 | if (color_words_output_graph_prefix(diff_words)) | |
970 | fputs(line_prefix, diff_words->opt->file); | |
971 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 972 | &style->ctx, style->newline, |
2e5d2003 | 973 | diff_words->plus.text.ptr + diff_words->plus.text.size |
4297c0ae BY |
974 | - diff_words->current_plus, diff_words->current_plus, |
975 | line_prefix); | |
976 | } | |
f59a59e2 | 977 | diff_words->minus.text.size = diff_words->plus.text.size = 0; |
f59a59e2 JS |
978 | } |
979 | ||
76fd2828 JH |
980 | /* In "color-words" mode, show word-diff of words accumulated in the buffer */ |
981 | static void diff_words_flush(struct emit_callback *ecbdata) | |
982 | { | |
983 | if (ecbdata->diff_words->minus.text.size || | |
984 | ecbdata->diff_words->plus.text.size) | |
985 | diff_words_show(ecbdata->diff_words); | |
986 | } | |
987 | ||
f59a59e2 JS |
988 | static void free_diff_words_data(struct emit_callback *ecbdata) |
989 | { | |
990 | if (ecbdata->diff_words) { | |
76fd2828 | 991 | diff_words_flush(ecbdata); |
8e0f7003 | 992 | free (ecbdata->diff_words->minus.text.ptr); |
2e5d2003 | 993 | free (ecbdata->diff_words->minus.orig); |
8e0f7003 | 994 | free (ecbdata->diff_words->plus.text.ptr); |
2e5d2003 | 995 | free (ecbdata->diff_words->plus.orig); |
ef5644ea BC |
996 | if (ecbdata->diff_words->word_regex) { |
997 | regfree(ecbdata->diff_words->word_regex); | |
998 | free(ecbdata->diff_words->word_regex); | |
999 | } | |
f59a59e2 JS |
1000 | free(ecbdata->diff_words); |
1001 | ecbdata->diff_words = NULL; | |
1002 | } | |
1003 | } | |
1004 | ||
ce436973 | 1005 | const char *diff_get_color(int diff_use_color, enum color_diff ix) |
cd112cef JS |
1006 | { |
1007 | if (diff_use_color) | |
50f575fc LT |
1008 | return diff_colors[ix]; |
1009 | return ""; | |
cd112cef JS |
1010 | } |
1011 | ||
23707811 JH |
1012 | static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len) |
1013 | { | |
1014 | const char *cp; | |
1015 | unsigned long allot; | |
1016 | size_t l = len; | |
1017 | ||
1018 | if (ecb->truncate) | |
1019 | return ecb->truncate(line, len); | |
1020 | cp = line; | |
1021 | allot = l; | |
1022 | while (0 < l) { | |
1023 | (void) utf8_width(&cp, &l); | |
1024 | if (!cp) | |
1025 | break; /* truncated in the middle? */ | |
1026 | } | |
1027 | return allot - l; | |
1028 | } | |
1029 | ||
d68fe26f | 1030 | static void find_lno(const char *line, struct emit_callback *ecbdata) |
690ed843 | 1031 | { |
d68fe26f JH |
1032 | const char *p; |
1033 | ecbdata->lno_in_preimage = 0; | |
1034 | ecbdata->lno_in_postimage = 0; | |
1035 | p = strchr(line, '-'); | |
690ed843 | 1036 | if (!p) |
d68fe26f JH |
1037 | return; /* cannot happen */ |
1038 | ecbdata->lno_in_preimage = strtol(p + 1, NULL, 10); | |
1039 | p = strchr(p, '+'); | |
1040 | if (!p) | |
1041 | return; /* cannot happen */ | |
1042 | ecbdata->lno_in_postimage = strtol(p + 1, NULL, 10); | |
690ed843 JH |
1043 | } |
1044 | ||
cd112cef | 1045 | static void fn_out_consume(void *priv, char *line, unsigned long len) |
6973dcae | 1046 | { |
6973dcae | 1047 | struct emit_callback *ecbdata = priv; |
472ca780 JK |
1048 | const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO); |
1049 | const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); | |
ce436973 | 1050 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); |
7be57610 BY |
1051 | struct diff_options *o = ecbdata->opt; |
1052 | char *line_prefix = ""; | |
1053 | struct strbuf *msgbuf; | |
1054 | ||
1055 | if (o && o->output_prefix) { | |
1056 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
1057 | line_prefix = msgbuf->buf; | |
1058 | } | |
6973dcae | 1059 | |
3e97c7c6 | 1060 | if (ecbdata->header) { |
a3c158d4 | 1061 | fprintf(ecbdata->opt->file, "%s", ecbdata->header->buf); |
3e97c7c6 GB |
1062 | strbuf_reset(ecbdata->header); |
1063 | ecbdata->header = NULL; | |
1064 | } | |
34a5e1a2 JS |
1065 | *(ecbdata->found_changesp) = 1; |
1066 | ||
6973dcae | 1067 | if (ecbdata->label_path[0]) { |
1a9eb3b9 JH |
1068 | const char *name_a_tab, *name_b_tab; |
1069 | ||
1070 | name_a_tab = strchr(ecbdata->label_path[0], ' ') ? "\t" : ""; | |
1071 | name_b_tab = strchr(ecbdata->label_path[1], ' ') ? "\t" : ""; | |
1072 | ||
7be57610 BY |
1073 | fprintf(ecbdata->opt->file, "%s%s--- %s%s%s\n", |
1074 | line_prefix, meta, ecbdata->label_path[0], reset, name_a_tab); | |
1075 | fprintf(ecbdata->opt->file, "%s%s+++ %s%s%s\n", | |
1076 | line_prefix, meta, ecbdata->label_path[1], reset, name_b_tab); | |
6973dcae JH |
1077 | ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; |
1078 | } | |
cd112cef | 1079 | |
a624eaa7 JM |
1080 | if (diff_suppress_blank_empty |
1081 | && len == 2 && line[0] == ' ' && line[1] == '\n') { | |
1082 | line[0] = '\n'; | |
1083 | len = 1; | |
1084 | } | |
1085 | ||
b8d9c1a6 | 1086 | if (line[0] == '@') { |
76fd2828 JH |
1087 | if (ecbdata->diff_words) |
1088 | diff_words_flush(ecbdata); | |
23707811 | 1089 | len = sane_truncate_line(ecbdata, line, len); |
d68fe26f | 1090 | find_lno(line, ecbdata); |
89cb73a1 | 1091 | emit_hunk_header(ecbdata, line, len); |
23707811 | 1092 | if (line[len-1] != '\n') |
a3c158d4 | 1093 | putc('\n', ecbdata->opt->file); |
448c3ef1 | 1094 | return; |
cd112cef | 1095 | } |
448c3ef1 | 1096 | |
b8d9c1a6 | 1097 | if (len < 1) { |
a3c158d4 | 1098 | emit_line(ecbdata->opt, reset, reset, line, len); |
882749a0 TR |
1099 | if (ecbdata->diff_words |
1100 | && ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) | |
a3c158d4 | 1101 | fputs("~\n", ecbdata->opt->file); |
448c3ef1 | 1102 | return; |
cd112cef | 1103 | } |
448c3ef1 | 1104 | |
448c3ef1 JH |
1105 | if (ecbdata->diff_words) { |
1106 | if (line[0] == '-') { | |
1107 | diff_words_append(line, len, | |
1108 | &ecbdata->diff_words->minus); | |
1109 | return; | |
1110 | } else if (line[0] == '+') { | |
1111 | diff_words_append(line, len, | |
1112 | &ecbdata->diff_words->plus); | |
1113 | return; | |
1114 | } | |
76fd2828 | 1115 | diff_words_flush(ecbdata); |
882749a0 | 1116 | if (ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) { |
a3c158d4 BY |
1117 | emit_line(ecbdata->opt, plain, reset, line, len); |
1118 | fputs("~\n", ecbdata->opt->file); | |
882749a0 | 1119 | } else { |
42536dd9 JM |
1120 | /* |
1121 | * Skip the prefix character, if any. With | |
1122 | * diff_suppress_blank_empty, there may be | |
1123 | * none. | |
1124 | */ | |
1125 | if (line[0] != '\n') { | |
1126 | line++; | |
1127 | len--; | |
1128 | } | |
1129 | emit_line(ecbdata->opt, plain, reset, line, len); | |
882749a0 | 1130 | } |
448c3ef1 JH |
1131 | return; |
1132 | } | |
448c3ef1 | 1133 | |
690ed843 JH |
1134 | if (line[0] != '+') { |
1135 | const char *color = | |
1136 | diff_get_color(ecbdata->color_diff, | |
1137 | line[0] == '-' ? DIFF_FILE_OLD : DIFF_PLAIN); | |
1138 | ecbdata->lno_in_preimage++; | |
d68fe26f JH |
1139 | if (line[0] == ' ') |
1140 | ecbdata->lno_in_postimage++; | |
a3c158d4 | 1141 | emit_line(ecbdata->opt, color, reset, line, len); |
d68fe26f JH |
1142 | } else { |
1143 | ecbdata->lno_in_postimage++; | |
018cff70 | 1144 | emit_add_line(reset, ecbdata, line + 1, len - 1); |
448c3ef1 | 1145 | } |
6973dcae JH |
1146 | } |
1147 | ||
1148 | static char *pprint_rename(const char *a, const char *b) | |
1149 | { | |
1150 | const char *old = a; | |
1151 | const char *new = b; | |
f285a2d7 | 1152 | struct strbuf name = STRBUF_INIT; |
6973dcae JH |
1153 | int pfx_length, sfx_length; |
1154 | int len_a = strlen(a); | |
1155 | int len_b = strlen(b); | |
663af342 | 1156 | int a_midlen, b_midlen; |
e5bfbf9b AJ |
1157 | int qlen_a = quote_c_style(a, NULL, NULL, 0); |
1158 | int qlen_b = quote_c_style(b, NULL, NULL, 0); | |
1159 | ||
1160 | if (qlen_a || qlen_b) { | |
663af342 PH |
1161 | quote_c_style(a, &name, NULL, 0); |
1162 | strbuf_addstr(&name, " => "); | |
1163 | quote_c_style(b, &name, NULL, 0); | |
b315c5c0 | 1164 | return strbuf_detach(&name, NULL); |
e5bfbf9b | 1165 | } |
6973dcae JH |
1166 | |
1167 | /* Find common prefix */ | |
1168 | pfx_length = 0; | |
1169 | while (*old && *new && *old == *new) { | |
1170 | if (*old == '/') | |
1171 | pfx_length = old - a + 1; | |
1172 | old++; | |
1173 | new++; | |
1174 | } | |
1175 | ||
1176 | /* Find common suffix */ | |
1177 | old = a + len_a; | |
1178 | new = b + len_b; | |
1179 | sfx_length = 0; | |
1180 | while (a <= old && b <= new && *old == *new) { | |
1181 | if (*old == '/') | |
1182 | sfx_length = len_a - (old - a); | |
1183 | old--; | |
1184 | new--; | |
1185 | } | |
1186 | ||
1187 | /* | |
1188 | * pfx{mid-a => mid-b}sfx | |
1189 | * {pfx-a => pfx-b}sfx | |
1190 | * pfx{sfx-a => sfx-b} | |
1191 | * name-a => name-b | |
1192 | */ | |
663af342 PH |
1193 | a_midlen = len_a - pfx_length - sfx_length; |
1194 | b_midlen = len_b - pfx_length - sfx_length; | |
1195 | if (a_midlen < 0) | |
1196 | a_midlen = 0; | |
1197 | if (b_midlen < 0) | |
1198 | b_midlen = 0; | |
1199 | ||
1200 | strbuf_grow(&name, pfx_length + a_midlen + b_midlen + sfx_length + 7); | |
6973dcae | 1201 | if (pfx_length + sfx_length) { |
663af342 PH |
1202 | strbuf_add(&name, a, pfx_length); |
1203 | strbuf_addch(&name, '{'); | |
6973dcae | 1204 | } |
663af342 PH |
1205 | strbuf_add(&name, a + pfx_length, a_midlen); |
1206 | strbuf_addstr(&name, " => "); | |
1207 | strbuf_add(&name, b + pfx_length, b_midlen); | |
1208 | if (pfx_length + sfx_length) { | |
1209 | strbuf_addch(&name, '}'); | |
1210 | strbuf_add(&name, a + len_a - sfx_length, sfx_length); | |
6973dcae | 1211 | } |
b315c5c0 | 1212 | return strbuf_detach(&name, NULL); |
6973dcae JH |
1213 | } |
1214 | ||
1215 | struct diffstat_t { | |
6973dcae JH |
1216 | int nr; |
1217 | int alloc; | |
1218 | struct diffstat_file { | |
f604652e | 1219 | char *from_name; |
6973dcae | 1220 | char *name; |
f604652e | 1221 | char *print_name; |
6973dcae JH |
1222 | unsigned is_unmerged:1; |
1223 | unsigned is_binary:1; | |
1224 | unsigned is_renamed:1; | |
0974c117 | 1225 | uintmax_t added, deleted; |
6973dcae JH |
1226 | } **files; |
1227 | }; | |
1228 | ||
1229 | static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat, | |
1230 | const char *name_a, | |
1231 | const char *name_b) | |
1232 | { | |
1233 | struct diffstat_file *x; | |
1234 | x = xcalloc(sizeof (*x), 1); | |
1235 | if (diffstat->nr == diffstat->alloc) { | |
1236 | diffstat->alloc = alloc_nr(diffstat->alloc); | |
1237 | diffstat->files = xrealloc(diffstat->files, | |
1238 | diffstat->alloc * sizeof(x)); | |
1239 | } | |
1240 | diffstat->files[diffstat->nr++] = x; | |
1241 | if (name_b) { | |
f604652e JH |
1242 | x->from_name = xstrdup(name_a); |
1243 | x->name = xstrdup(name_b); | |
6973dcae JH |
1244 | x->is_renamed = 1; |
1245 | } | |
f604652e JH |
1246 | else { |
1247 | x->from_name = NULL; | |
9befac47 | 1248 | x->name = xstrdup(name_a); |
f604652e | 1249 | } |
6973dcae JH |
1250 | return x; |
1251 | } | |
1252 | ||
1253 | static void diffstat_consume(void *priv, char *line, unsigned long len) | |
1254 | { | |
1255 | struct diffstat_t *diffstat = priv; | |
1256 | struct diffstat_file *x = diffstat->files[diffstat->nr - 1]; | |
1257 | ||
1258 | if (line[0] == '+') | |
1259 | x->added++; | |
1260 | else if (line[0] == '-') | |
1261 | x->deleted++; | |
1262 | } | |
1263 | ||
698ce6f8 | 1264 | const char mime_boundary_leader[] = "------------"; |
6973dcae | 1265 | |
a2540023 JH |
1266 | static int scale_linear(int it, int width, int max_change) |
1267 | { | |
1268 | /* | |
3ed74e60 JS |
1269 | * make sure that at least one '-' is printed if there were deletions, |
1270 | * and likewise for '+'. | |
a2540023 | 1271 | */ |
3ed74e60 JS |
1272 | if (max_change < 2) |
1273 | return it; | |
1274 | return ((it - 1) * (width - 1) + max_change - 1) / (max_change - 1); | |
a2540023 JH |
1275 | } |
1276 | ||
c0c77734 | 1277 | static void show_name(FILE *file, |
a408e0e6 | 1278 | const char *prefix, const char *name, int len) |
a2540023 | 1279 | { |
a408e0e6 | 1280 | fprintf(file, " %s%-*s |", prefix, len, name); |
a2540023 JH |
1281 | } |
1282 | ||
c0c77734 | 1283 | static void show_graph(FILE *file, char ch, int cnt, const char *set, const char *reset) |
a2540023 JH |
1284 | { |
1285 | if (cnt <= 0) | |
1286 | return; | |
c0c77734 | 1287 | fprintf(file, "%s", set); |
a2540023 | 1288 | while (cnt--) |
c0c77734 DB |
1289 | putc(ch, file); |
1290 | fprintf(file, "%s", reset); | |
a2540023 JH |
1291 | } |
1292 | ||
f604652e JH |
1293 | static void fill_print_name(struct diffstat_file *file) |
1294 | { | |
1295 | char *pname; | |
1296 | ||
1297 | if (file->print_name) | |
1298 | return; | |
1299 | ||
1300 | if (!file->is_renamed) { | |
f285a2d7 | 1301 | struct strbuf buf = STRBUF_INIT; |
f604652e JH |
1302 | if (quote_c_style(file->name, &buf, NULL, 0)) { |
1303 | pname = strbuf_detach(&buf, NULL); | |
1304 | } else { | |
1305 | pname = file->name; | |
1306 | strbuf_release(&buf); | |
1307 | } | |
1308 | } else { | |
1309 | pname = pprint_rename(file->from_name, file->name); | |
1310 | } | |
1311 | file->print_name = pname; | |
1312 | } | |
1313 | ||
4b25d091 | 1314 | static void show_stats(struct diffstat_t *data, struct diff_options *options) |
6973dcae | 1315 | { |
eb3a9dd3 | 1316 | int i, len, add, del, adds = 0, dels = 0; |
0974c117 | 1317 | uintmax_t max_change = 0, max_len = 0; |
6973dcae | 1318 | int total_files = data->nr; |
808e1db2 | 1319 | int width, name_width, count; |
c0aa335c | 1320 | const char *reset, *add_c, *del_c; |
7be57610 | 1321 | const char *line_prefix = ""; |
e5f85df8 | 1322 | int extra_shown = 0; |
7be57610 | 1323 | struct strbuf *msg = NULL; |
6973dcae JH |
1324 | |
1325 | if (data->nr == 0) | |
1326 | return; | |
1327 | ||
7be57610 BY |
1328 | if (options->output_prefix) { |
1329 | msg = options->output_prefix(options, options->output_prefix_data); | |
1330 | line_prefix = msg->buf; | |
1331 | } | |
1332 | ||
a2540023 JH |
1333 | width = options->stat_width ? options->stat_width : 80; |
1334 | name_width = options->stat_name_width ? options->stat_name_width : 50; | |
808e1db2 | 1335 | count = options->stat_count ? options->stat_count : data->nr; |
a2540023 JH |
1336 | |
1337 | /* Sanity: give at least 5 columns to the graph, | |
1338 | * but leave at least 10 columns for the name. | |
1339 | */ | |
861d1af3 OM |
1340 | if (width < 25) |
1341 | width = 25; | |
1342 | if (name_width < 10) | |
1343 | name_width = 10; | |
1344 | else if (width < name_width + 15) | |
1345 | name_width = width - 15; | |
a2540023 JH |
1346 | |
1347 | /* Find the longest filename and max number of changes */ | |
8f67f8ae | 1348 | reset = diff_get_color_opt(options, DIFF_RESET); |
8f67f8ae PH |
1349 | add_c = diff_get_color_opt(options, DIFF_FILE_NEW); |
1350 | del_c = diff_get_color_opt(options, DIFF_FILE_OLD); | |
785f7432 | 1351 | |
808e1db2 | 1352 | for (i = 0; (i < count) && (i < data->nr); i++) { |
6973dcae | 1353 | struct diffstat_file *file = data->files[i]; |
0974c117 | 1354 | uintmax_t change = file->added + file->deleted; |
358e460e MG |
1355 | if (!data->files[i]->is_renamed && |
1356 | (change == 0)) { | |
808e1db2 | 1357 | count++; /* not shown == room for one more */ |
358e460e MG |
1358 | continue; |
1359 | } | |
f604652e JH |
1360 | fill_print_name(file); |
1361 | len = strlen(file->print_name); | |
6973dcae JH |
1362 | if (max_len < len) |
1363 | max_len = len; | |
1364 | ||
1365 | if (file->is_binary || file->is_unmerged) | |
1366 | continue; | |
a2540023 JH |
1367 | if (max_change < change) |
1368 | max_change = change; | |
6973dcae | 1369 | } |
808e1db2 | 1370 | count = i; /* min(count, data->nr) */ |
6973dcae | 1371 | |
a2540023 JH |
1372 | /* Compute the width of the graph part; |
1373 | * 10 is for one blank at the beginning of the line plus | |
1374 | * " | count " between the name and the graph. | |
1375 | * | |
1376 | * From here on, name_width is the width of the name area, | |
1377 | * and width is the width of the graph area. | |
1378 | */ | |
1379 | name_width = (name_width < max_len) ? name_width : max_len; | |
1380 | if (width < (name_width + 10) + max_change) | |
1381 | width = width - (name_width + 10); | |
1382 | else | |
1383 | width = max_change; | |
1384 | ||
808e1db2 | 1385 | for (i = 0; i < count; i++) { |
d2543b8e | 1386 | const char *prefix = ""; |
f604652e | 1387 | char *name = data->files[i]->print_name; |
0974c117 JK |
1388 | uintmax_t added = data->files[i]->added; |
1389 | uintmax_t deleted = data->files[i]->deleted; | |
a2540023 | 1390 | int name_len; |
6973dcae | 1391 | |
358e460e MG |
1392 | if (!data->files[i]->is_renamed && |
1393 | (added + deleted == 0)) { | |
1394 | total_files--; | |
1395 | continue; | |
1396 | } | |
6973dcae JH |
1397 | /* |
1398 | * "scale" the filename | |
1399 | */ | |
a2540023 JH |
1400 | len = name_width; |
1401 | name_len = strlen(name); | |
1402 | if (name_width < name_len) { | |
6973dcae JH |
1403 | char *slash; |
1404 | prefix = "..."; | |
a2540023 JH |
1405 | len -= 3; |
1406 | name += name_len - len; | |
6973dcae JH |
1407 | slash = strchr(name, '/'); |
1408 | if (slash) | |
1409 | name = slash; | |
1410 | } | |
6973dcae JH |
1411 | |
1412 | if (data->files[i]->is_binary) { | |
7be57610 | 1413 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1414 | show_name(options->file, prefix, name, len); |
c0c77734 | 1415 | fprintf(options->file, " Bin "); |
0974c117 JK |
1416 | fprintf(options->file, "%s%"PRIuMAX"%s", |
1417 | del_c, deleted, reset); | |
c0c77734 | 1418 | fprintf(options->file, " -> "); |
0974c117 JK |
1419 | fprintf(options->file, "%s%"PRIuMAX"%s", |
1420 | add_c, added, reset); | |
c0c77734 DB |
1421 | fprintf(options->file, " bytes"); |
1422 | fprintf(options->file, "\n"); | |
f604652e | 1423 | continue; |
6973dcae JH |
1424 | } |
1425 | else if (data->files[i]->is_unmerged) { | |
7be57610 | 1426 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1427 | show_name(options->file, prefix, name, len); |
c0c77734 | 1428 | fprintf(options->file, " Unmerged\n"); |
f604652e | 1429 | continue; |
6973dcae | 1430 | } |
6973dcae | 1431 | |
a2540023 JH |
1432 | /* |
1433 | * scale the add/delete | |
1434 | */ | |
6973dcae JH |
1435 | add = added; |
1436 | del = deleted; | |
6973dcae JH |
1437 | adds += add; |
1438 | dels += del; | |
1439 | ||
a2540023 | 1440 | if (width <= max_change) { |
a2540023 | 1441 | add = scale_linear(add, width, max_change); |
3ed74e60 | 1442 | del = scale_linear(del, width, max_change); |
6973dcae | 1443 | } |
7be57610 | 1444 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1445 | show_name(options->file, prefix, name, len); |
0974c117 | 1446 | fprintf(options->file, "%5"PRIuMAX"%s", added + deleted, |
4d9b5359 | 1447 | added + deleted ? " " : ""); |
c0c77734 DB |
1448 | show_graph(options->file, '+', add, add_c, reset); |
1449 | show_graph(options->file, '-', del, del_c, reset); | |
1450 | fprintf(options->file, "\n"); | |
1451 | } | |
808e1db2 MG |
1452 | for (i = count; i < data->nr; i++) { |
1453 | uintmax_t added = data->files[i]->added; | |
1454 | uintmax_t deleted = data->files[i]->deleted; | |
1455 | if (!data->files[i]->is_renamed && | |
1456 | (added + deleted == 0)) { | |
1457 | total_files--; | |
1458 | continue; | |
1459 | } | |
1460 | adds += added; | |
1461 | dels += deleted; | |
e5f85df8 JH |
1462 | if (!extra_shown) |
1463 | fprintf(options->file, "%s ...\n", line_prefix); | |
1464 | extra_shown = 1; | |
808e1db2 | 1465 | } |
7be57610 | 1466 | fprintf(options->file, "%s", line_prefix); |
c0c77734 | 1467 | fprintf(options->file, |
a408e0e6 MH |
1468 | " %d files changed, %d insertions(+), %d deletions(-)\n", |
1469 | total_files, adds, dels); | |
6973dcae JH |
1470 | } |
1471 | ||
2775d92c | 1472 | static void show_shortstats(struct diffstat_t *data, struct diff_options *options) |
ebd124c6 NP |
1473 | { |
1474 | int i, adds = 0, dels = 0, total_files = data->nr; | |
1475 | ||
1476 | if (data->nr == 0) | |
1477 | return; | |
1478 | ||
1479 | for (i = 0; i < data->nr; i++) { | |
1480 | if (!data->files[i]->is_binary && | |
1481 | !data->files[i]->is_unmerged) { | |
1482 | int added = data->files[i]->added; | |
1483 | int deleted= data->files[i]->deleted; | |
1484 | if (!data->files[i]->is_renamed && | |
1485 | (added + deleted == 0)) { | |
1486 | total_files--; | |
1487 | } else { | |
1488 | adds += added; | |
1489 | dels += deleted; | |
1490 | } | |
1491 | } | |
ebd124c6 | 1492 | } |
7be57610 BY |
1493 | if (options->output_prefix) { |
1494 | struct strbuf *msg = NULL; | |
1495 | msg = options->output_prefix(options, | |
1496 | options->output_prefix_data); | |
1497 | fprintf(options->file, "%s", msg->buf); | |
1498 | } | |
c0c77734 | 1499 | fprintf(options->file, " %d files changed, %d insertions(+), %d deletions(-)\n", |
ebd124c6 NP |
1500 | total_files, adds, dels); |
1501 | } | |
1502 | ||
4b25d091 | 1503 | static void show_numstat(struct diffstat_t *data, struct diff_options *options) |
74e2abe5 JH |
1504 | { |
1505 | int i; | |
1506 | ||
f604652e JH |
1507 | if (data->nr == 0) |
1508 | return; | |
1509 | ||
74e2abe5 JH |
1510 | for (i = 0; i < data->nr; i++) { |
1511 | struct diffstat_file *file = data->files[i]; | |
1512 | ||
7be57610 BY |
1513 | if (options->output_prefix) { |
1514 | struct strbuf *msg = NULL; | |
1515 | msg = options->output_prefix(options, | |
1516 | options->output_prefix_data); | |
1517 | fprintf(options->file, "%s", msg->buf); | |
1518 | } | |
1519 | ||
bfddbc5e | 1520 | if (file->is_binary) |
c0c77734 | 1521 | fprintf(options->file, "-\t-\t"); |
bfddbc5e | 1522 | else |
c0c77734 | 1523 | fprintf(options->file, |
0974c117 JK |
1524 | "%"PRIuMAX"\t%"PRIuMAX"\t", |
1525 | file->added, file->deleted); | |
f604652e JH |
1526 | if (options->line_termination) { |
1527 | fill_print_name(file); | |
1528 | if (!file->is_renamed) | |
c0c77734 | 1529 | write_name_quoted(file->name, options->file, |
f604652e JH |
1530 | options->line_termination); |
1531 | else { | |
c0c77734 DB |
1532 | fputs(file->print_name, options->file); |
1533 | putc(options->line_termination, options->file); | |
f604652e | 1534 | } |
663af342 | 1535 | } else { |
f604652e | 1536 | if (file->is_renamed) { |
c0c77734 DB |
1537 | putc('\0', options->file); |
1538 | write_name_quoted(file->from_name, options->file, '\0'); | |
f604652e | 1539 | } |
c0c77734 | 1540 | write_name_quoted(file->name, options->file, '\0'); |
663af342 | 1541 | } |
74e2abe5 JH |
1542 | } |
1543 | } | |
1544 | ||
c04a7155 JH |
1545 | struct dirstat_file { |
1546 | const char *name; | |
1547 | unsigned long changed; | |
7df7c019 LT |
1548 | }; |
1549 | ||
c04a7155 JH |
1550 | struct dirstat_dir { |
1551 | struct dirstat_file *files; | |
712d2c7d | 1552 | int alloc, nr, permille, cumulative; |
c04a7155 JH |
1553 | }; |
1554 | ||
7be57610 BY |
1555 | static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir, |
1556 | unsigned long changed, const char *base, int baselen) | |
7df7c019 LT |
1557 | { |
1558 | unsigned long this_dir = 0; | |
1559 | unsigned int sources = 0; | |
7be57610 BY |
1560 | const char *line_prefix = ""; |
1561 | struct strbuf *msg = NULL; | |
1562 | ||
1563 | if (opt->output_prefix) { | |
1564 | msg = opt->output_prefix(opt, opt->output_prefix_data); | |
1565 | line_prefix = msg->buf; | |
1566 | } | |
7df7c019 LT |
1567 | |
1568 | while (dir->nr) { | |
c04a7155 | 1569 | struct dirstat_file *f = dir->files; |
7df7c019 LT |
1570 | int namelen = strlen(f->name); |
1571 | unsigned long this; | |
1572 | char *slash; | |
1573 | ||
1574 | if (namelen < baselen) | |
1575 | break; | |
1576 | if (memcmp(f->name, base, baselen)) | |
1577 | break; | |
1578 | slash = strchr(f->name + baselen, '/'); | |
1579 | if (slash) { | |
1580 | int newbaselen = slash + 1 - f->name; | |
7be57610 | 1581 | this = gather_dirstat(opt, dir, changed, f->name, newbaselen); |
7df7c019 LT |
1582 | sources++; |
1583 | } else { | |
c04a7155 | 1584 | this = f->changed; |
7df7c019 LT |
1585 | dir->files++; |
1586 | dir->nr--; | |
1587 | sources += 2; | |
1588 | } | |
1589 | this_dir += this; | |
1590 | } | |
1591 | ||
1592 | /* | |
1593 | * We don't report dirstat's for | |
1594 | * - the top level | |
1595 | * - or cases where everything came from a single directory | |
1596 | * under this directory (sources == 1). | |
1597 | */ | |
1598 | if (baselen && sources != 1) { | |
58a8756a JH |
1599 | if (this_dir) { |
1600 | int permille = this_dir * 1000 / changed; | |
712d2c7d | 1601 | if (permille >= dir->permille) { |
7be57610 | 1602 | fprintf(opt->file, "%s%4d.%01d%% %.*s\n", line_prefix, |
712d2c7d | 1603 | permille / 10, permille % 10, baselen, base); |
7df7c019 LT |
1604 | if (!dir->cumulative) |
1605 | return 0; | |
1606 | } | |
1607 | } | |
1608 | } | |
1609 | return this_dir; | |
1610 | } | |
1611 | ||
441bca0b LT |
1612 | static int dirstat_compare(const void *_a, const void *_b) |
1613 | { | |
1614 | const struct dirstat_file *a = _a; | |
1615 | const struct dirstat_file *b = _b; | |
1616 | return strcmp(a->name, b->name); | |
1617 | } | |
1618 | ||
c04a7155 | 1619 | static void show_dirstat(struct diff_options *options) |
7df7c019 LT |
1620 | { |
1621 | int i; | |
1622 | unsigned long changed; | |
c04a7155 JH |
1623 | struct dirstat_dir dir; |
1624 | struct diff_queue_struct *q = &diff_queued_diff; | |
1625 | ||
1626 | dir.files = NULL; | |
1627 | dir.alloc = 0; | |
1628 | dir.nr = 0; | |
712d2c7d | 1629 | dir.permille = options->dirstat_permille; |
f88d225f | 1630 | dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); |
7df7c019 | 1631 | |
7df7c019 | 1632 | changed = 0; |
c04a7155 JH |
1633 | for (i = 0; i < q->nr; i++) { |
1634 | struct diff_filepair *p = q->queue[i]; | |
1635 | const char *name; | |
1636 | unsigned long copied, added, damage; | |
0133dab7 | 1637 | int content_changed; |
c04a7155 | 1638 | |
2ca86714 | 1639 | name = p->two->path ? p->two->path : p->one->path; |
c04a7155 | 1640 | |
0133dab7 JH |
1641 | if (p->one->sha1_valid && p->two->sha1_valid) |
1642 | content_changed = hashcmp(p->one->sha1, p->two->sha1); | |
1643 | else | |
1644 | content_changed = 1; | |
1645 | ||
2ff3a803 JH |
1646 | if (!content_changed) { |
1647 | /* | |
1648 | * The SHA1 has not changed, so pre-/post-content is | |
1649 | * identical. We can therefore skip looking at the | |
1650 | * file contents altogether. | |
1651 | */ | |
1652 | damage = 0; | |
1653 | goto found_damage; | |
1654 | } | |
1655 | ||
0133dab7 JH |
1656 | if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE)) { |
1657 | /* | |
1658 | * In --dirstat-by-file mode, we don't really need to | |
1659 | * look at the actual file contents at all. | |
1660 | * The fact that the SHA1 changed is enough for us to | |
1661 | * add this file to the list of results | |
1662 | * (with each file contributing equal damage). | |
1663 | */ | |
2ff3a803 | 1664 | damage = 1; |
0133dab7 JH |
1665 | goto found_damage; |
1666 | } | |
c04a7155 JH |
1667 | |
1668 | if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) { | |
1669 | diff_populate_filespec(p->one, 0); | |
1670 | diff_populate_filespec(p->two, 0); | |
1671 | diffcore_count_changes(p->one, p->two, NULL, NULL, 0, | |
1672 | &copied, &added); | |
1673 | diff_free_filespec_data(p->one); | |
1674 | diff_free_filespec_data(p->two); | |
1675 | } else if (DIFF_FILE_VALID(p->one)) { | |
1676 | diff_populate_filespec(p->one, 1); | |
1677 | copied = added = 0; | |
1678 | diff_free_filespec_data(p->one); | |
1679 | } else if (DIFF_FILE_VALID(p->two)) { | |
1680 | diff_populate_filespec(p->two, 1); | |
1681 | copied = 0; | |
1682 | added = p->two->size; | |
1683 | diff_free_filespec_data(p->two); | |
1684 | } else | |
2b0b551d | 1685 | continue; |
c04a7155 JH |
1686 | |
1687 | /* | |
1688 | * Original minus copied is the removed material, | |
1689 | * added is the new material. They are both damages | |
0133dab7 | 1690 | * made to the preimage. |
2ff3a803 JH |
1691 | * If the resulting damage is zero, we know that |
1692 | * diffcore_count_changes() considers the two entries to | |
1693 | * be identical, but since content_changed is true, we | |
1694 | * know that there must have been _some_ kind of change, | |
1695 | * so we force all entries to have damage > 0. | |
c04a7155 JH |
1696 | */ |
1697 | damage = (p->one->size - copied) + added; | |
2ff3a803 | 1698 | if (!damage) |
fd33777b | 1699 | damage = 1; |
c04a7155 | 1700 | |
0133dab7 | 1701 | found_damage: |
c04a7155 JH |
1702 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); |
1703 | dir.files[dir.nr].name = name; | |
1704 | dir.files[dir.nr].changed = damage; | |
1705 | changed += damage; | |
1706 | dir.nr++; | |
7df7c019 LT |
1707 | } |
1708 | ||
1709 | /* This can happen even with many files, if everything was renames */ | |
1710 | if (!changed) | |
1711 | return; | |
1712 | ||
1713 | /* Show all directories with more than x% of the changes */ | |
441bca0b | 1714 | qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); |
7be57610 | 1715 | gather_dirstat(options, &dir, changed, "", 0); |
7df7c019 LT |
1716 | } |
1717 | ||
1c57a627 JH |
1718 | static void show_dirstat_by_line(struct diffstat_t *data, struct diff_options *options) |
1719 | { | |
1720 | int i; | |
1721 | unsigned long changed; | |
1722 | struct dirstat_dir dir; | |
1723 | ||
1724 | if (data->nr == 0) | |
1725 | return; | |
1726 | ||
1727 | dir.files = NULL; | |
1728 | dir.alloc = 0; | |
1729 | dir.nr = 0; | |
1730 | dir.permille = options->dirstat_permille; | |
1731 | dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); | |
1732 | ||
1733 | changed = 0; | |
1734 | for (i = 0; i < data->nr; i++) { | |
1735 | struct diffstat_file *file = data->files[i]; | |
1736 | unsigned long damage = file->added + file->deleted; | |
1737 | if (file->is_binary) | |
1738 | /* | |
1739 | * binary files counts bytes, not lines. Must find some | |
1740 | * way to normalize binary bytes vs. textual lines. | |
1741 | * The following heuristic assumes that there are 64 | |
1742 | * bytes per "line". | |
1743 | * This is stupid and ugly, but very cheap... | |
1744 | */ | |
1745 | damage = (damage + 63) / 64; | |
1746 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); | |
1747 | dir.files[dir.nr].name = file->name; | |
1748 | dir.files[dir.nr].changed = damage; | |
1749 | changed += damage; | |
1750 | dir.nr++; | |
1751 | } | |
1752 | ||
1753 | /* This can happen even with many files, if everything was renames */ | |
1754 | if (!changed) | |
1755 | return; | |
1756 | ||
1757 | /* Show all directories with more than x% of the changes */ | |
1758 | qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); | |
1759 | gather_dirstat(options, &dir, changed, "", 0); | |
1760 | } | |
1761 | ||
f604652e JH |
1762 | static void free_diffstat_info(struct diffstat_t *diffstat) |
1763 | { | |
1764 | int i; | |
1765 | for (i = 0; i < diffstat->nr; i++) { | |
1766 | struct diffstat_file *f = diffstat->files[i]; | |
1767 | if (f->name != f->print_name) | |
1768 | free(f->print_name); | |
1769 | free(f->name); | |
1770 | free(f->from_name); | |
1771 | free(f); | |
1772 | } | |
1773 | free(diffstat->files); | |
1774 | } | |
1775 | ||
88246898 | 1776 | struct checkdiff_t { |
88246898 | 1777 | const char *filename; |
1ba111d1 | 1778 | int lineno; |
a757c646 | 1779 | int conflict_marker_size; |
1ba111d1 | 1780 | struct diff_options *o; |
cf1b7869 | 1781 | unsigned ws_rule; |
62c64895 | 1782 | unsigned status; |
88246898 JS |
1783 | }; |
1784 | ||
a757c646 | 1785 | static int is_conflict_marker(const char *line, int marker_size, unsigned long len) |
04954043 JH |
1786 | { |
1787 | char firstchar; | |
1788 | int cnt; | |
1789 | ||
a757c646 | 1790 | if (len < marker_size + 1) |
04954043 JH |
1791 | return 0; |
1792 | firstchar = line[0]; | |
1793 | switch (firstchar) { | |
a757c646 | 1794 | case '=': case '>': case '<': case '|': |
04954043 JH |
1795 | break; |
1796 | default: | |
1797 | return 0; | |
1798 | } | |
a757c646 | 1799 | for (cnt = 1; cnt < marker_size; cnt++) |
04954043 JH |
1800 | if (line[cnt] != firstchar) |
1801 | return 0; | |
a757c646 JH |
1802 | /* line[1] thru line[marker_size-1] are same as firstchar */ |
1803 | if (len < marker_size + 1 || !isspace(line[marker_size])) | |
04954043 | 1804 | return 0; |
04954043 JH |
1805 | return 1; |
1806 | } | |
1807 | ||
88246898 JS |
1808 | static void checkdiff_consume(void *priv, char *line, unsigned long len) |
1809 | { | |
1810 | struct checkdiff_t *data = priv; | |
1ba111d1 | 1811 | int color_diff = DIFF_OPT_TST(data->o, COLOR_DIFF); |
a757c646 | 1812 | int marker_size = data->conflict_marker_size; |
1ba111d1 JH |
1813 | const char *ws = diff_get_color(color_diff, DIFF_WHITESPACE); |
1814 | const char *reset = diff_get_color(color_diff, DIFF_RESET); | |
1815 | const char *set = diff_get_color(color_diff, DIFF_FILE_NEW); | |
c1795bb0 | 1816 | char *err; |
7be57610 BY |
1817 | char *line_prefix = ""; |
1818 | struct strbuf *msgbuf; | |
1819 | ||
1820 | assert(data->o); | |
1821 | if (data->o->output_prefix) { | |
1822 | msgbuf = data->o->output_prefix(data->o, | |
1823 | data->o->output_prefix_data); | |
1824 | line_prefix = msgbuf->buf; | |
1825 | } | |
88246898 JS |
1826 | |
1827 | if (line[0] == '+') { | |
18374e58 | 1828 | unsigned bad; |
0ef617f4 | 1829 | data->lineno++; |
a757c646 | 1830 | if (is_conflict_marker(line + 1, marker_size, len - 1)) { |
04954043 JH |
1831 | data->status |= 1; |
1832 | fprintf(data->o->file, | |
7be57610 BY |
1833 | "%s%s:%d: leftover conflict marker\n", |
1834 | line_prefix, data->filename, data->lineno); | |
04954043 | 1835 | } |
8f8841e9 | 1836 | bad = ws_check(line + 1, len - 1, data->ws_rule); |
18374e58 | 1837 | if (!bad) |
c1795bb0 | 1838 | return; |
18374e58 JH |
1839 | data->status |= bad; |
1840 | err = whitespace_error_string(bad); | |
7be57610 BY |
1841 | fprintf(data->o->file, "%s%s:%d: %s.\n", |
1842 | line_prefix, data->filename, data->lineno, err); | |
c1795bb0 | 1843 | free(err); |
a3c158d4 | 1844 | emit_line(data->o, set, reset, line, 1); |
8f8841e9 | 1845 | ws_check_emit(line + 1, len - 1, data->ws_rule, |
1ba111d1 | 1846 | data->o->file, set, reset, ws); |
877f23cc | 1847 | } else if (line[0] == ' ') { |
88246898 | 1848 | data->lineno++; |
877f23cc | 1849 | } else if (line[0] == '@') { |
88246898 JS |
1850 | char *plus = strchr(line, '+'); |
1851 | if (plus) | |
0ef617f4 | 1852 | data->lineno = strtol(plus, NULL, 10) - 1; |
88246898 JS |
1853 | else |
1854 | die("invalid diff"); | |
1855 | } | |
1856 | } | |
1857 | ||
0660626c JH |
1858 | static unsigned char *deflate_it(char *data, |
1859 | unsigned long size, | |
1860 | unsigned long *result_size) | |
051308f6 | 1861 | { |
0660626c JH |
1862 | int bound; |
1863 | unsigned char *deflated; | |
ef49a7a0 | 1864 | git_zstream stream; |
0660626c JH |
1865 | |
1866 | memset(&stream, 0, sizeof(stream)); | |
55bb5c91 | 1867 | git_deflate_init(&stream, zlib_compression_level); |
225a6f10 | 1868 | bound = git_deflate_bound(&stream, size); |
0660626c JH |
1869 | deflated = xmalloc(bound); |
1870 | stream.next_out = deflated; | |
1871 | stream.avail_out = bound; | |
1872 | ||
1873 | stream.next_in = (unsigned char *)data; | |
1874 | stream.avail_in = size; | |
55bb5c91 | 1875 | while (git_deflate(&stream, Z_FINISH) == Z_OK) |
0660626c | 1876 | ; /* nothing */ |
55bb5c91 | 1877 | git_deflate_end(&stream); |
0660626c JH |
1878 | *result_size = stream.total_out; |
1879 | return deflated; | |
051308f6 JH |
1880 | } |
1881 | ||
7be57610 | 1882 | static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two, char *prefix) |
051308f6 | 1883 | { |
0660626c JH |
1884 | void *cp; |
1885 | void *delta; | |
1886 | void *deflated; | |
1887 | void *data; | |
1888 | unsigned long orig_size; | |
1889 | unsigned long delta_size; | |
1890 | unsigned long deflate_size; | |
1891 | unsigned long data_size; | |
051308f6 | 1892 | |
0660626c JH |
1893 | /* We could do deflated delta, or we could do just deflated two, |
1894 | * whichever is smaller. | |
051308f6 | 1895 | */ |
0660626c JH |
1896 | delta = NULL; |
1897 | deflated = deflate_it(two->ptr, two->size, &deflate_size); | |
1898 | if (one->size && two->size) { | |
1899 | delta = diff_delta(one->ptr, one->size, | |
1900 | two->ptr, two->size, | |
1901 | &delta_size, deflate_size); | |
1902 | if (delta) { | |
1903 | void *to_free = delta; | |
1904 | orig_size = delta_size; | |
1905 | delta = deflate_it(delta, delta_size, &delta_size); | |
1906 | free(to_free); | |
051308f6 JH |
1907 | } |
1908 | } | |
051308f6 | 1909 | |
0660626c | 1910 | if (delta && delta_size < deflate_size) { |
7be57610 | 1911 | fprintf(file, "%sdelta %lu\n", prefix, orig_size); |
0660626c JH |
1912 | free(deflated); |
1913 | data = delta; | |
1914 | data_size = delta_size; | |
1915 | } | |
1916 | else { | |
7be57610 | 1917 | fprintf(file, "%sliteral %lu\n", prefix, two->size); |
0660626c JH |
1918 | free(delta); |
1919 | data = deflated; | |
1920 | data_size = deflate_size; | |
1921 | } | |
051308f6 | 1922 | |
0660626c JH |
1923 | /* emit data encoded in base85 */ |
1924 | cp = data; | |
1925 | while (data_size) { | |
1926 | int bytes = (52 < data_size) ? 52 : data_size; | |
051308f6 | 1927 | char line[70]; |
0660626c | 1928 | data_size -= bytes; |
051308f6 JH |
1929 | if (bytes <= 26) |
1930 | line[0] = bytes + 'A' - 1; | |
1931 | else | |
1932 | line[0] = bytes - 26 + 'a' - 1; | |
1933 | encode_85(line + 1, cp, bytes); | |
1d7f171c | 1934 | cp = (char *) cp + bytes; |
7be57610 | 1935 | fprintf(file, "%s", prefix); |
c0c77734 DB |
1936 | fputs(line, file); |
1937 | fputc('\n', file); | |
051308f6 | 1938 | } |
7be57610 | 1939 | fprintf(file, "%s\n", prefix); |
0660626c | 1940 | free(data); |
051308f6 JH |
1941 | } |
1942 | ||
7be57610 | 1943 | static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two, char *prefix) |
d4c452f0 | 1944 | { |
7be57610 BY |
1945 | fprintf(file, "%sGIT binary patch\n", prefix); |
1946 | emit_binary_diff_body(file, one, two, prefix); | |
1947 | emit_binary_diff_body(file, two, one, prefix); | |
d4c452f0 JH |
1948 | } |
1949 | ||
72cf4841 | 1950 | static void diff_filespec_load_driver(struct diff_filespec *one) |
6973dcae | 1951 | { |
d391c0ff JK |
1952 | /* Use already-loaded driver */ |
1953 | if (one->driver) | |
1954 | return; | |
1955 | ||
1956 | if (S_ISREG(one->mode)) | |
122aa6f9 | 1957 | one->driver = userdiff_find_by_path(one->path); |
d391c0ff JK |
1958 | |
1959 | /* Fallback to default settings */ | |
122aa6f9 JK |
1960 | if (!one->driver) |
1961 | one->driver = userdiff_find_by_name("default"); | |
29a3eefd JH |
1962 | } |
1963 | ||
1964 | int diff_filespec_is_binary(struct diff_filespec *one) | |
1965 | { | |
122aa6f9 JK |
1966 | if (one->is_binary == -1) { |
1967 | diff_filespec_load_driver(one); | |
1968 | if (one->driver->binary != -1) | |
1969 | one->is_binary = one->driver->binary; | |
1970 | else { | |
1971 | if (!one->data && DIFF_FILE_VALID(one)) | |
1972 | diff_populate_filespec(one, 0); | |
1973 | if (one->data) | |
1974 | one->is_binary = buffer_is_binary(one->data, | |
1975 | one->size); | |
1976 | if (one->is_binary == -1) | |
1977 | one->is_binary = 0; | |
1978 | } | |
1979 | } | |
29a3eefd | 1980 | return one->is_binary; |
6973dcae JH |
1981 | } |
1982 | ||
be58e70d | 1983 | static const struct userdiff_funcname *diff_funcname_pattern(struct diff_filespec *one) |
f258475a | 1984 | { |
122aa6f9 JK |
1985 | diff_filespec_load_driver(one); |
1986 | return one->driver->funcname.pattern ? &one->driver->funcname : NULL; | |
f258475a JH |
1987 | } |
1988 | ||
80c49c3d TR |
1989 | static const char *userdiff_word_regex(struct diff_filespec *one) |
1990 | { | |
1991 | diff_filespec_load_driver(one); | |
1992 | return one->driver->word_regex; | |
1993 | } | |
1994 | ||
a5a818ee JH |
1995 | void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b) |
1996 | { | |
1997 | if (!options->a_prefix) | |
1998 | options->a_prefix = a; | |
1999 | if (!options->b_prefix) | |
2000 | options->b_prefix = b; | |
2001 | } | |
2002 | ||
a788d7d5 | 2003 | struct userdiff_driver *get_textconv(struct diff_filespec *one) |
04427ac8 JK |
2004 | { |
2005 | if (!DIFF_FILE_VALID(one)) | |
2006 | return NULL; | |
d391c0ff | 2007 | |
04427ac8 | 2008 | diff_filespec_load_driver(one); |
3813e690 | 2009 | return userdiff_get_textconv(one->driver); |
04427ac8 JK |
2010 | } |
2011 | ||
6973dcae JH |
2012 | static void builtin_diff(const char *name_a, |
2013 | const char *name_b, | |
2014 | struct diff_filespec *one, | |
2015 | struct diff_filespec *two, | |
2016 | const char *xfrm_msg, | |
296c6bb2 | 2017 | int must_show_header, |
051308f6 | 2018 | struct diff_options *o, |
6973dcae JH |
2019 | int complete_rewrite) |
2020 | { | |
2021 | mmfile_t mf1, mf2; | |
2022 | const char *lbl[2]; | |
2023 | char *a_one, *b_two; | |
8f67f8ae PH |
2024 | const char *set = diff_get_color_opt(o, DIFF_METAINFO); |
2025 | const char *reset = diff_get_color_opt(o, DIFF_RESET); | |
a5a818ee | 2026 | const char *a_prefix, *b_prefix; |
d9bae1a1 JK |
2027 | struct userdiff_driver *textconv_one = NULL; |
2028 | struct userdiff_driver *textconv_two = NULL; | |
3e97c7c6 | 2029 | struct strbuf header = STRBUF_INIT; |
7be57610 BY |
2030 | struct strbuf *msgbuf; |
2031 | char *line_prefix = ""; | |
2032 | ||
2033 | if (o->output_prefix) { | |
2034 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
2035 | line_prefix = msgbuf->buf; | |
2036 | } | |
a5a818ee | 2037 | |
752c0c24 JS |
2038 | if (DIFF_OPT_TST(o, SUBMODULE_LOG) && |
2039 | (!one->mode || S_ISGITLINK(one->mode)) && | |
2040 | (!two->mode || S_ISGITLINK(two->mode))) { | |
2041 | const char *del = diff_get_color_opt(o, DIFF_FILE_OLD); | |
2042 | const char *add = diff_get_color_opt(o, DIFF_FILE_NEW); | |
2043 | show_submodule_summary(o->file, one ? one->path : two->path, | |
721ceec1 | 2044 | one->sha1, two->sha1, two->dirty_submodule, |
752c0c24 JS |
2045 | del, add, reset); |
2046 | return; | |
2047 | } | |
2048 | ||
3aa1f7ca JK |
2049 | if (DIFF_OPT_TST(o, ALLOW_TEXTCONV)) { |
2050 | textconv_one = get_textconv(one); | |
2051 | textconv_two = get_textconv(two); | |
2052 | } | |
2053 | ||
a5a818ee JH |
2054 | diff_set_mnemonic_prefix(o, "a/", "b/"); |
2055 | if (DIFF_OPT_TST(o, REVERSE_DIFF)) { | |
2056 | a_prefix = o->b_prefix; | |
2057 | b_prefix = o->a_prefix; | |
2058 | } else { | |
2059 | a_prefix = o->a_prefix; | |
2060 | b_prefix = o->b_prefix; | |
2061 | } | |
6973dcae | 2062 | |
71b989e7 LT |
2063 | /* Never use a non-valid filename anywhere if at all possible */ |
2064 | name_a = DIFF_FILE_VALID(one) ? name_a : name_b; | |
2065 | name_b = DIFF_FILE_VALID(two) ? name_b : name_a; | |
2066 | ||
a5a818ee JH |
2067 | a_one = quote_two(a_prefix, name_a + (*name_a == '/')); |
2068 | b_two = quote_two(b_prefix, name_b + (*name_b == '/')); | |
6973dcae JH |
2069 | lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; |
2070 | lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; | |
7be57610 | 2071 | strbuf_addf(&header, "%s%sdiff --git %s %s%s\n", line_prefix, set, a_one, b_two, reset); |
6973dcae JH |
2072 | if (lbl[0][0] == '/') { |
2073 | /* /dev/null */ | |
7be57610 | 2074 | strbuf_addf(&header, "%s%snew file mode %06o%s\n", line_prefix, set, two->mode, reset); |
37466447 BW |
2075 | if (xfrm_msg) |
2076 | strbuf_addstr(&header, xfrm_msg); | |
296c6bb2 | 2077 | must_show_header = 1; |
6973dcae JH |
2078 | } |
2079 | else if (lbl[1][0] == '/') { | |
7be57610 | 2080 | strbuf_addf(&header, "%s%sdeleted file mode %06o%s\n", line_prefix, set, one->mode, reset); |
37466447 BW |
2081 | if (xfrm_msg) |
2082 | strbuf_addstr(&header, xfrm_msg); | |
296c6bb2 | 2083 | must_show_header = 1; |
6973dcae JH |
2084 | } |
2085 | else { | |
2086 | if (one->mode != two->mode) { | |
7be57610 BY |
2087 | strbuf_addf(&header, "%s%sold mode %06o%s\n", line_prefix, set, one->mode, reset); |
2088 | strbuf_addf(&header, "%s%snew mode %06o%s\n", line_prefix, set, two->mode, reset); | |
296c6bb2 | 2089 | must_show_header = 1; |
cd112cef | 2090 | } |
37466447 BW |
2091 | if (xfrm_msg) |
2092 | strbuf_addstr(&header, xfrm_msg); | |
3e97c7c6 | 2093 | |
6973dcae JH |
2094 | /* |
2095 | * we do not run diff between different kind | |
2096 | * of objects. | |
2097 | */ | |
2098 | if ((one->mode ^ two->mode) & S_IFMT) | |
2099 | goto free_ab_and_return; | |
0c01857d | 2100 | if (complete_rewrite && |
3aa1f7ca JK |
2101 | (textconv_one || !diff_filespec_is_binary(one)) && |
2102 | (textconv_two || !diff_filespec_is_binary(two))) { | |
3e97c7c6 GB |
2103 | fprintf(o->file, "%s", header.buf); |
2104 | strbuf_reset(&header); | |
3aa1f7ca JK |
2105 | emit_rewrite_diff(name_a, name_b, one, two, |
2106 | textconv_one, textconv_two, o); | |
34a5e1a2 | 2107 | o->found_changes = 1; |
6973dcae JH |
2108 | goto free_ab_and_return; |
2109 | } | |
2110 | } | |
2111 | ||
467ddc14 JH |
2112 | if (o->irreversible_delete && lbl[1][0] == '/') { |
2113 | fprintf(o->file, "%s", header.buf); | |
2114 | strbuf_reset(&header); | |
2115 | goto free_ab_and_return; | |
2116 | } else if (!DIFF_OPT_TST(o, TEXT) && | |
b3373982 JK |
2117 | ( (!textconv_one && diff_filespec_is_binary(one)) || |
2118 | (!textconv_two && diff_filespec_is_binary(two)) )) { | |
2119 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
2120 | die("unable to read files to diff"); | |
0660626c JH |
2121 | /* Quite common confusing case */ |
2122 | if (mf1.size == mf2.size && | |
296c6bb2 CC |
2123 | !memcmp(mf1.ptr, mf2.ptr, mf1.size)) { |
2124 | if (must_show_header) | |
2125 | fprintf(o->file, "%s", header.buf); | |
0660626c | 2126 | goto free_ab_and_return; |
296c6bb2 | 2127 | } |
3e97c7c6 GB |
2128 | fprintf(o->file, "%s", header.buf); |
2129 | strbuf_reset(&header); | |
8f67f8ae | 2130 | if (DIFF_OPT_TST(o, BINARY)) |
7be57610 | 2131 | emit_binary_diff(o->file, &mf1, &mf2, line_prefix); |
051308f6 | 2132 | else |
7be57610 BY |
2133 | fprintf(o->file, "%sBinary files %s and %s differ\n", |
2134 | line_prefix, lbl[0], lbl[1]); | |
34a5e1a2 | 2135 | o->found_changes = 1; |
467ddc14 | 2136 | } else { |
6973dcae JH |
2137 | /* Crazy xdl interfaces.. */ |
2138 | const char *diffopts = getenv("GIT_DIFF_OPTS"); | |
2139 | xpparam_t xpp; | |
2140 | xdemitconf_t xecfg; | |
6973dcae | 2141 | struct emit_callback ecbdata; |
be58e70d | 2142 | const struct userdiff_funcname *pe; |
f258475a | 2143 | |
296c6bb2 | 2144 | if (!DIFF_XDL_TST(o, WHITESPACE_FLAGS) || must_show_header) { |
3e97c7c6 GB |
2145 | fprintf(o->file, "%s", header.buf); |
2146 | strbuf_reset(&header); | |
2147 | } | |
2148 | ||
840383b2 JK |
2149 | mf1.size = fill_textconv(textconv_one, one, &mf1.ptr); |
2150 | mf2.size = fill_textconv(textconv_two, two, &mf2.ptr); | |
04427ac8 | 2151 | |
45e7ca0f BC |
2152 | pe = diff_funcname_pattern(one); |
2153 | if (!pe) | |
2154 | pe = diff_funcname_pattern(two); | |
6973dcae | 2155 | |
9ccd0a88 | 2156 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2157 | memset(&xecfg, 0, sizeof(xecfg)); |
cd112cef | 2158 | memset(&ecbdata, 0, sizeof(ecbdata)); |
6973dcae | 2159 | ecbdata.label_path = lbl; |
8f67f8ae | 2160 | ecbdata.color_diff = DIFF_OPT_TST(o, COLOR_DIFF); |
34a5e1a2 | 2161 | ecbdata.found_changesp = &o->found_changes; |
cf1b7869 | 2162 | ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a); |
690ed843 | 2163 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) |
d68fe26f | 2164 | check_blank_at_eof(&mf1, &mf2, &ecbdata); |
a3c158d4 | 2165 | ecbdata.opt = o; |
3e97c7c6 | 2166 | ecbdata.header = header.len ? &header : NULL; |
582aa00b | 2167 | xpp.flags = o->xdl_opts; |
ee1e5412 | 2168 | xecfg.ctxlen = o->context; |
6d0e674a | 2169 | xecfg.interhunkctxlen = o->interhunkcontext; |
6973dcae | 2170 | xecfg.flags = XDL_EMIT_FUNCNAMES; |
45e7ca0f | 2171 | if (pe) |
a013585b | 2172 | xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags); |
6973dcae JH |
2173 | if (!diffopts) |
2174 | ; | |
cc44c765 | 2175 | else if (!prefixcmp(diffopts, "--unified=")) |
6973dcae | 2176 | xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10); |
cc44c765 | 2177 | else if (!prefixcmp(diffopts, "-u")) |
6973dcae | 2178 | xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10); |
882749a0 TR |
2179 | if (o->word_diff) { |
2180 | int i; | |
2181 | ||
f59a59e2 JS |
2182 | ecbdata.diff_words = |
2183 | xcalloc(1, sizeof(struct diff_words_data)); | |
882749a0 | 2184 | ecbdata.diff_words->type = o->word_diff; |
4297c0ae | 2185 | ecbdata.diff_words->opt = o; |
80c49c3d TR |
2186 | if (!o->word_regex) |
2187 | o->word_regex = userdiff_word_regex(one); | |
2188 | if (!o->word_regex) | |
2189 | o->word_regex = userdiff_word_regex(two); | |
98a4d87b BSSJ |
2190 | if (!o->word_regex) |
2191 | o->word_regex = diff_word_regex_cfg; | |
2b6a5417 JS |
2192 | if (o->word_regex) { |
2193 | ecbdata.diff_words->word_regex = (regex_t *) | |
2194 | xmalloc(sizeof(regex_t)); | |
2195 | if (regcomp(ecbdata.diff_words->word_regex, | |
bf82940d TR |
2196 | o->word_regex, |
2197 | REG_EXTENDED | REG_NEWLINE)) | |
2b6a5417 JS |
2198 | die ("Invalid regular expression: %s", |
2199 | o->word_regex); | |
2200 | } | |
882749a0 TR |
2201 | for (i = 0; i < ARRAY_SIZE(diff_words_styles); i++) { |
2202 | if (o->word_diff == diff_words_styles[i].type) { | |
2203 | ecbdata.diff_words->style = | |
2204 | &diff_words_styles[i]; | |
2205 | break; | |
2206 | } | |
2207 | } | |
2208 | if (DIFF_OPT_TST(o, COLOR_DIFF)) { | |
2209 | struct diff_words_style *st = ecbdata.diff_words->style; | |
2210 | st->old.color = diff_get_color_opt(o, DIFF_FILE_OLD); | |
2211 | st->new.color = diff_get_color_opt(o, DIFF_FILE_NEW); | |
2212 | st->ctx.color = diff_get_color_opt(o, DIFF_PLAIN); | |
2213 | } | |
c0c77734 | 2214 | } |
8a3f524b | 2215 | xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata, |
dfea7900 | 2216 | &xpp, &xecfg); |
882749a0 | 2217 | if (o->word_diff) |
f59a59e2 | 2218 | free_diff_words_data(&ecbdata); |
04427ac8 JK |
2219 | if (textconv_one) |
2220 | free(mf1.ptr); | |
2221 | if (textconv_two) | |
2222 | free(mf2.ptr); | |
8cfe5f1c | 2223 | xdiff_clear_find_func(&xecfg); |
6973dcae JH |
2224 | } |
2225 | ||
2226 | free_ab_and_return: | |
3e97c7c6 | 2227 | strbuf_release(&header); |
fc3abdf5 JH |
2228 | diff_free_filespec_data(one); |
2229 | diff_free_filespec_data(two); | |
6973dcae JH |
2230 | free(a_one); |
2231 | free(b_two); | |
2232 | return; | |
2233 | } | |
2234 | ||
2235 | static void builtin_diffstat(const char *name_a, const char *name_b, | |
2236 | struct diff_filespec *one, | |
2237 | struct diff_filespec *two, | |
710158e3 | 2238 | struct diffstat_t *diffstat, |
0d21efa5 | 2239 | struct diff_options *o, |
710158e3 | 2240 | int complete_rewrite) |
6973dcae JH |
2241 | { |
2242 | mmfile_t mf1, mf2; | |
2243 | struct diffstat_file *data; | |
2244 | ||
2245 | data = diffstat_add(diffstat, name_a, name_b); | |
2246 | ||
2247 | if (!one || !two) { | |
2248 | data->is_unmerged = 1; | |
2249 | return; | |
2250 | } | |
ded0abc7 JK |
2251 | |
2252 | if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) { | |
ded0abc7 | 2253 | data->is_binary = 1; |
abb371a1 JK |
2254 | data->added = diff_filespec_size(two); |
2255 | data->deleted = diff_filespec_size(one); | |
ded0abc7 JK |
2256 | } |
2257 | ||
2258 | else if (complete_rewrite) { | |
710158e3 JH |
2259 | diff_populate_filespec(one, 0); |
2260 | diff_populate_filespec(two, 0); | |
2261 | data->deleted = count_lines(one->data, one->size); | |
2262 | data->added = count_lines(two->data, two->size); | |
710158e3 | 2263 | } |
6973dcae | 2264 | |
ded0abc7 | 2265 | else { |
6973dcae JH |
2266 | /* Crazy xdl interfaces.. */ |
2267 | xpparam_t xpp; | |
2268 | xdemitconf_t xecfg; | |
6973dcae | 2269 | |
ded0abc7 JK |
2270 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) |
2271 | die("unable to read files to diff"); | |
2272 | ||
9ccd0a88 | 2273 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2274 | memset(&xecfg, 0, sizeof(xecfg)); |
582aa00b | 2275 | xpp.flags = o->xdl_opts; |
8a3f524b | 2276 | xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat, |
dfea7900 | 2277 | &xpp, &xecfg); |
6973dcae | 2278 | } |
fc3abdf5 | 2279 | |
fc3abdf5 JH |
2280 | diff_free_filespec_data(one); |
2281 | diff_free_filespec_data(two); | |
6973dcae JH |
2282 | } |
2283 | ||
88246898 | 2284 | static void builtin_checkdiff(const char *name_a, const char *name_b, |
cd676a51 | 2285 | const char *attr_path, |
5ff10dd6 JH |
2286 | struct diff_filespec *one, |
2287 | struct diff_filespec *two, | |
2288 | struct diff_options *o) | |
88246898 JS |
2289 | { |
2290 | mmfile_t mf1, mf2; | |
2291 | struct checkdiff_t data; | |
2292 | ||
2293 | if (!two) | |
2294 | return; | |
2295 | ||
2296 | memset(&data, 0, sizeof(data)); | |
88246898 JS |
2297 | data.filename = name_b ? name_b : name_a; |
2298 | data.lineno = 0; | |
1ba111d1 | 2299 | data.o = o; |
cd676a51 | 2300 | data.ws_rule = whitespace_rule(attr_path); |
a757c646 | 2301 | data.conflict_marker_size = ll_merge_marker_size(attr_path); |
88246898 JS |
2302 | |
2303 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
2304 | die("unable to read files to diff"); | |
2305 | ||
5ff10dd6 JH |
2306 | /* |
2307 | * All the other codepaths check both sides, but not checking | |
2308 | * the "old" side here is deliberate. We are checking the newly | |
2309 | * introduced changes, and as long as the "new" side is text, we | |
2310 | * can and should check what it introduces. | |
2311 | */ | |
29a3eefd | 2312 | if (diff_filespec_is_binary(two)) |
fc3abdf5 | 2313 | goto free_and_return; |
88246898 JS |
2314 | else { |
2315 | /* Crazy xdl interfaces.. */ | |
2316 | xpparam_t xpp; | |
2317 | xdemitconf_t xecfg; | |
88246898 | 2318 | |
9ccd0a88 | 2319 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2320 | memset(&xecfg, 0, sizeof(xecfg)); |
c35539eb | 2321 | xecfg.ctxlen = 1; /* at least one context line */ |
582aa00b | 2322 | xpp.flags = 0; |
8a3f524b | 2323 | xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data, |
dfea7900 | 2324 | &xpp, &xecfg); |
877f23cc | 2325 | |
467babf8 | 2326 | if (data.ws_rule & WS_BLANK_AT_EOF) { |
d68fe26f JH |
2327 | struct emit_callback ecbdata; |
2328 | int blank_at_eof; | |
2329 | ||
2330 | ecbdata.ws_rule = data.ws_rule; | |
2331 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
8837d335 | 2332 | blank_at_eof = ecbdata.blank_at_eof_in_postimage; |
d68fe26f | 2333 | |
467babf8 JH |
2334 | if (blank_at_eof) { |
2335 | static char *err; | |
2336 | if (!err) | |
2337 | err = whitespace_error_string(WS_BLANK_AT_EOF); | |
2338 | fprintf(o->file, "%s:%d: %s.\n", | |
2339 | data.filename, blank_at_eof, err); | |
2340 | data.status = 1; /* report errors */ | |
2341 | } | |
877f23cc | 2342 | } |
88246898 | 2343 | } |
fc3abdf5 JH |
2344 | free_and_return: |
2345 | diff_free_filespec_data(one); | |
2346 | diff_free_filespec_data(two); | |
62c64895 WC |
2347 | if (data.status) |
2348 | DIFF_OPT_SET(o, CHECK_FAILED); | |
88246898 JS |
2349 | } |
2350 | ||
6973dcae JH |
2351 | struct diff_filespec *alloc_filespec(const char *path) |
2352 | { | |
2353 | int namelen = strlen(path); | |
2354 | struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1); | |
2355 | ||
2356 | memset(spec, 0, sizeof(*spec)); | |
2357 | spec->path = (char *)(spec + 1); | |
2358 | memcpy(spec->path, path, namelen+1); | |
9fb88419 | 2359 | spec->count = 1; |
122aa6f9 | 2360 | spec->is_binary = -1; |
6973dcae JH |
2361 | return spec; |
2362 | } | |
2363 | ||
9fb88419 LT |
2364 | void free_filespec(struct diff_filespec *spec) |
2365 | { | |
2366 | if (!--spec->count) { | |
2367 | diff_free_filespec_data(spec); | |
2368 | free(spec); | |
2369 | } | |
2370 | } | |
2371 | ||
6973dcae JH |
2372 | void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1, |
2373 | unsigned short mode) | |
2374 | { | |
2375 | if (mode) { | |
2376 | spec->mode = canon_mode(mode); | |
e702496e | 2377 | hashcpy(spec->sha1, sha1); |
0bef57ee | 2378 | spec->sha1_valid = !is_null_sha1(sha1); |
6973dcae JH |
2379 | } |
2380 | } | |
2381 | ||
2382 | /* | |
5adf317b | 2383 | * Given a name and sha1 pair, if the index tells us the file in |
6973dcae JH |
2384 | * the work tree has that object contents, return true, so that |
2385 | * prepare_temp_file() does not have to inflate and extract. | |
2386 | */ | |
1510fea7 | 2387 | static int reuse_worktree_file(const char *name, const unsigned char *sha1, int want_file) |
6973dcae JH |
2388 | { |
2389 | struct cache_entry *ce; | |
2390 | struct stat st; | |
2391 | int pos, len; | |
2392 | ||
150115ad JH |
2393 | /* |
2394 | * We do not read the cache ourselves here, because the | |
6973dcae JH |
2395 | * benchmark with my previous version that always reads cache |
2396 | * shows that it makes things worse for diff-tree comparing | |
2397 | * two linux-2.6 kernel trees in an already checked out work | |
2398 | * tree. This is because most diff-tree comparisons deal with | |
2399 | * only a small number of files, while reading the cache is | |
2400 | * expensive for a large project, and its cost outweighs the | |
2401 | * savings we get by not inflating the object to a temporary | |
2402 | * file. Practically, this code only helps when we are used | |
2403 | * by diff-cache --cached, which does read the cache before | |
2404 | * calling us. | |
2405 | */ | |
2406 | if (!active_cache) | |
2407 | return 0; | |
2408 | ||
1510fea7 SP |
2409 | /* We want to avoid the working directory if our caller |
2410 | * doesn't need the data in a normal file, this system | |
2411 | * is rather slow with its stat/open/mmap/close syscalls, | |
2412 | * and the object is contained in a pack file. The pack | |
2413 | * is probably already open and will be faster to obtain | |
2414 | * the data through than the working directory. Loose | |
2415 | * objects however would tend to be slower as they need | |
2416 | * to be individually opened and inflated. | |
2417 | */ | |
cd673c1f | 2418 | if (!FAST_WORKING_DIRECTORY && !want_file && has_sha1_pack(sha1)) |
1510fea7 SP |
2419 | return 0; |
2420 | ||
6973dcae JH |
2421 | len = strlen(name); |
2422 | pos = cache_name_pos(name, len); | |
2423 | if (pos < 0) | |
2424 | return 0; | |
2425 | ce = active_cache[pos]; | |
eadb5831 JH |
2426 | |
2427 | /* | |
2428 | * This is not the sha1 we are looking for, or | |
2429 | * unreusable because it is not a regular file. | |
2430 | */ | |
2431 | if (hashcmp(sha1, ce->sha1) || !S_ISREG(ce->ce_mode)) | |
6973dcae | 2432 | return 0; |
eadb5831 | 2433 | |
150115ad JH |
2434 | /* |
2435 | * If ce is marked as "assume unchanged", there is no | |
2436 | * guarantee that work tree matches what we are looking for. | |
2437 | */ | |
b4d1690d | 2438 | if ((ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) |
150115ad JH |
2439 | return 0; |
2440 | ||
eadb5831 JH |
2441 | /* |
2442 | * If ce matches the file in the work tree, we can reuse it. | |
6973dcae | 2443 | */ |
eadb5831 JH |
2444 | if (ce_uptodate(ce) || |
2445 | (!lstat(name, &st) && !ce_match_stat(ce, &st, 0))) | |
2446 | return 1; | |
2447 | ||
2448 | return 0; | |
6973dcae JH |
2449 | } |
2450 | ||
3afaa72d JH |
2451 | static int populate_from_stdin(struct diff_filespec *s) |
2452 | { | |
f285a2d7 | 2453 | struct strbuf buf = STRBUF_INIT; |
c32f749f | 2454 | size_t size = 0; |
af6eb822 | 2455 | |
f1696ee3 | 2456 | if (strbuf_read(&buf, 0, 0) < 0) |
af6eb822 | 2457 | return error("error while reading from stdin %s", |
3afaa72d | 2458 | strerror(errno)); |
af6eb822 | 2459 | |
3afaa72d | 2460 | s->should_munmap = 0; |
c32f749f RS |
2461 | s->data = strbuf_detach(&buf, &size); |
2462 | s->size = size; | |
3afaa72d JH |
2463 | s->should_free = 1; |
2464 | return 0; | |
2465 | } | |
2466 | ||
04786756 LT |
2467 | static int diff_populate_gitlink(struct diff_filespec *s, int size_only) |
2468 | { | |
2469 | int len; | |
8e08b419 JH |
2470 | char *data = xmalloc(100), *dirty = ""; |
2471 | ||
2472 | /* Are we looking at the work tree? */ | |
85adbf2f | 2473 | if (s->dirty_submodule) |
8e08b419 JH |
2474 | dirty = "-dirty"; |
2475 | ||
04786756 | 2476 | len = snprintf(data, 100, |
8e08b419 | 2477 | "Subproject commit %s%s\n", sha1_to_hex(s->sha1), dirty); |
04786756 LT |
2478 | s->data = data; |
2479 | s->size = len; | |
2480 | s->should_free = 1; | |
2481 | if (size_only) { | |
2482 | s->data = NULL; | |
2483 | free(data); | |
2484 | } | |
2485 | return 0; | |
2486 | } | |
2487 | ||
6973dcae JH |
2488 | /* |
2489 | * While doing rename detection and pickaxe operation, we may need to | |
2490 | * grab the data for the blob (or file) for our own in-core comparison. | |
2491 | * diff_filespec has data and size fields for this purpose. | |
2492 | */ | |
2493 | int diff_populate_filespec(struct diff_filespec *s, int size_only) | |
2494 | { | |
2495 | int err = 0; | |
2496 | if (!DIFF_FILE_VALID(s)) | |
2497 | die("internal error: asking to populate invalid file."); | |
2498 | if (S_ISDIR(s->mode)) | |
2499 | return -1; | |
2500 | ||
6973dcae | 2501 | if (s->data) |
fc3abdf5 | 2502 | return 0; |
04786756 | 2503 | |
6e0b8ed6 JH |
2504 | if (size_only && 0 < s->size) |
2505 | return 0; | |
2506 | ||
302b9282 | 2507 | if (S_ISGITLINK(s->mode)) |
04786756 LT |
2508 | return diff_populate_gitlink(s, size_only); |
2509 | ||
6973dcae | 2510 | if (!s->sha1_valid || |
1510fea7 | 2511 | reuse_worktree_file(s->path, s->sha1, 0)) { |
f285a2d7 | 2512 | struct strbuf buf = STRBUF_INIT; |
6973dcae JH |
2513 | struct stat st; |
2514 | int fd; | |
6c510bee | 2515 | |
3afaa72d JH |
2516 | if (!strcmp(s->path, "-")) |
2517 | return populate_from_stdin(s); | |
2518 | ||
6973dcae JH |
2519 | if (lstat(s->path, &st) < 0) { |
2520 | if (errno == ENOENT) { | |
2521 | err_empty: | |
2522 | err = -1; | |
2523 | empty: | |
d2543b8e | 2524 | s->data = (char *)""; |
6973dcae JH |
2525 | s->size = 0; |
2526 | return err; | |
2527 | } | |
2528 | } | |
dc49cd76 | 2529 | s->size = xsize_t(st.st_size); |
6973dcae JH |
2530 | if (!s->size) |
2531 | goto empty; | |
6973dcae | 2532 | if (S_ISLNK(st.st_mode)) { |
cf219d8c LT |
2533 | struct strbuf sb = STRBUF_INIT; |
2534 | ||
2535 | if (strbuf_readlink(&sb, s->path, s->size)) | |
6973dcae | 2536 | goto err_empty; |
0956a6db RS |
2537 | s->size = sb.len; |
2538 | s->data = strbuf_detach(&sb, NULL); | |
cf219d8c | 2539 | s->should_free = 1; |
6973dcae JH |
2540 | return 0; |
2541 | } | |
cf219d8c LT |
2542 | if (size_only) |
2543 | return 0; | |
6973dcae JH |
2544 | fd = open(s->path, O_RDONLY); |
2545 | if (fd < 0) | |
2546 | goto err_empty; | |
c4712e45 | 2547 | s->data = xmmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0); |
6973dcae | 2548 | close(fd); |
6973dcae | 2549 | s->should_munmap = 1; |
6c510bee LT |
2550 | |
2551 | /* | |
2552 | * Convert from working tree format to canonical git format | |
2553 | */ | |
21e5ad50 | 2554 | if (convert_to_git(s->path, s->data, s->size, &buf, safe_crlf)) { |
c32f749f | 2555 | size_t size = 0; |
6c510bee LT |
2556 | munmap(s->data, s->size); |
2557 | s->should_munmap = 0; | |
c32f749f RS |
2558 | s->data = strbuf_detach(&buf, &size); |
2559 | s->size = size; | |
6c510bee LT |
2560 | s->should_free = 1; |
2561 | } | |
6973dcae JH |
2562 | } |
2563 | else { | |
21666f1a | 2564 | enum object_type type; |
c50c4316 | 2565 | if (size_only) { |
21666f1a | 2566 | type = sha1_object_info(s->sha1, &s->size); |
c50c4316 NP |
2567 | if (type < 0) |
2568 | die("unable to read %s", sha1_to_hex(s->sha1)); | |
2569 | } else { | |
21666f1a | 2570 | s->data = read_sha1_file(s->sha1, &type, &s->size); |
c50c4316 NP |
2571 | if (!s->data) |
2572 | die("unable to read %s", sha1_to_hex(s->sha1)); | |
6973dcae JH |
2573 | s->should_free = 1; |
2574 | } | |
2575 | } | |
2576 | return 0; | |
2577 | } | |
2578 | ||
8ae92e63 | 2579 | void diff_free_filespec_blob(struct diff_filespec *s) |
6973dcae JH |
2580 | { |
2581 | if (s->should_free) | |
2582 | free(s->data); | |
2583 | else if (s->should_munmap) | |
2584 | munmap(s->data, s->size); | |
fc3abdf5 JH |
2585 | |
2586 | if (s->should_free || s->should_munmap) { | |
2587 | s->should_free = s->should_munmap = 0; | |
2588 | s->data = NULL; | |
2589 | } | |
eede7b7d JK |
2590 | } |
2591 | ||
2592 | void diff_free_filespec_data(struct diff_filespec *s) | |
2593 | { | |
8ae92e63 | 2594 | diff_free_filespec_blob(s); |
6973dcae JH |
2595 | free(s->cnt_data); |
2596 | s->cnt_data = NULL; | |
2597 | } | |
2598 | ||
4e218f54 | 2599 | static void prep_temp_blob(const char *path, struct diff_tempfile *temp, |
6973dcae JH |
2600 | void *blob, |
2601 | unsigned long size, | |
2602 | const unsigned char *sha1, | |
2603 | int mode) | |
2604 | { | |
2605 | int fd; | |
4e218f54 | 2606 | struct strbuf buf = STRBUF_INIT; |
003b33a8 DA |
2607 | struct strbuf template = STRBUF_INIT; |
2608 | char *path_dup = xstrdup(path); | |
2609 | const char *base = basename(path_dup); | |
6973dcae | 2610 | |
003b33a8 DA |
2611 | /* Generate "XXXXXX_basename.ext" */ |
2612 | strbuf_addstr(&template, "XXXXXX_"); | |
2613 | strbuf_addstr(&template, base); | |
2614 | ||
2615 | fd = git_mkstemps(temp->tmp_path, PATH_MAX, template.buf, | |
2616 | strlen(base) + 1); | |
6973dcae | 2617 | if (fd < 0) |
d824cbba | 2618 | die_errno("unable to create temp-file"); |
4e218f54 JS |
2619 | if (convert_to_working_tree(path, |
2620 | (const char *)blob, (size_t)size, &buf)) { | |
2621 | blob = buf.buf; | |
2622 | size = buf.len; | |
2623 | } | |
93822c22 | 2624 | if (write_in_full(fd, blob, size) != size) |
0721c314 | 2625 | die_errno("unable to write temp-file"); |
6973dcae JH |
2626 | close(fd); |
2627 | temp->name = temp->tmp_path; | |
2628 | strcpy(temp->hex, sha1_to_hex(sha1)); | |
2629 | temp->hex[40] = 0; | |
2630 | sprintf(temp->mode, "%06o", mode); | |
4e218f54 | 2631 | strbuf_release(&buf); |
003b33a8 DA |
2632 | strbuf_release(&template); |
2633 | free(path_dup); | |
6973dcae JH |
2634 | } |
2635 | ||
479b0ae8 JK |
2636 | static struct diff_tempfile *prepare_temp_file(const char *name, |
2637 | struct diff_filespec *one) | |
6973dcae | 2638 | { |
479b0ae8 JK |
2639 | struct diff_tempfile *temp = claim_diff_tempfile(); |
2640 | ||
6973dcae JH |
2641 | if (!DIFF_FILE_VALID(one)) { |
2642 | not_a_valid_file: | |
2643 | /* A '-' entry produces this for file-2, and | |
2644 | * a '+' entry produces this for file-1. | |
2645 | */ | |
2646 | temp->name = "/dev/null"; | |
2647 | strcpy(temp->hex, "."); | |
2648 | strcpy(temp->mode, "."); | |
479b0ae8 JK |
2649 | return temp; |
2650 | } | |
2651 | ||
2652 | if (!remove_tempfile_installed) { | |
2653 | atexit(remove_tempfile); | |
57b235a4 | 2654 | sigchain_push_common(remove_tempfile_on_signal); |
479b0ae8 | 2655 | remove_tempfile_installed = 1; |
6973dcae JH |
2656 | } |
2657 | ||
2658 | if (!one->sha1_valid || | |
1510fea7 | 2659 | reuse_worktree_file(name, one->sha1, 1)) { |
6973dcae JH |
2660 | struct stat st; |
2661 | if (lstat(name, &st) < 0) { | |
2662 | if (errno == ENOENT) | |
2663 | goto not_a_valid_file; | |
d824cbba | 2664 | die_errno("stat(%s)", name); |
6973dcae JH |
2665 | } |
2666 | if (S_ISLNK(st.st_mode)) { | |
3cd7388d JK |
2667 | struct strbuf sb = STRBUF_INIT; |
2668 | if (strbuf_readlink(&sb, name, st.st_size) < 0) | |
0721c314 | 2669 | die_errno("readlink(%s)", name); |
3cd7388d | 2670 | prep_temp_blob(name, temp, sb.buf, sb.len, |
6973dcae JH |
2671 | (one->sha1_valid ? |
2672 | one->sha1 : null_sha1), | |
2673 | (one->sha1_valid ? | |
2674 | one->mode : S_IFLNK)); | |
3cd7388d | 2675 | strbuf_release(&sb); |
6973dcae JH |
2676 | } |
2677 | else { | |
2678 | /* we can borrow from the file in the work tree */ | |
2679 | temp->name = name; | |
2680 | if (!one->sha1_valid) | |
2681 | strcpy(temp->hex, sha1_to_hex(null_sha1)); | |
2682 | else | |
2683 | strcpy(temp->hex, sha1_to_hex(one->sha1)); | |
2684 | /* Even though we may sometimes borrow the | |
2685 | * contents from the work tree, we always want | |
2686 | * one->mode. mode is trustworthy even when | |
2687 | * !(one->sha1_valid), as long as | |
2688 | * DIFF_FILE_VALID(one). | |
2689 | */ | |
2690 | sprintf(temp->mode, "%06o", one->mode); | |
2691 | } | |
479b0ae8 | 2692 | return temp; |
6973dcae JH |
2693 | } |
2694 | else { | |
2695 | if (diff_populate_filespec(one, 0)) | |
2696 | die("cannot read data blob for %s", one->path); | |
4e218f54 | 2697 | prep_temp_blob(name, temp, one->data, one->size, |
6973dcae JH |
2698 | one->sha1, one->mode); |
2699 | } | |
479b0ae8 | 2700 | return temp; |
6973dcae JH |
2701 | } |
2702 | ||
6973dcae JH |
2703 | /* An external diff command takes: |
2704 | * | |
2705 | * diff-cmd name infile1 infile1-sha1 infile1-mode \ | |
2706 | * infile2 infile2-sha1 infile2-mode [ rename-to ] | |
2707 | * | |
2708 | */ | |
2709 | static void run_external_diff(const char *pgm, | |
2710 | const char *name, | |
2711 | const char *other, | |
2712 | struct diff_filespec *one, | |
2713 | struct diff_filespec *two, | |
2714 | const char *xfrm_msg, | |
2715 | int complete_rewrite) | |
2716 | { | |
2717 | const char *spawn_arg[10]; | |
6973dcae | 2718 | int retval; |
6973dcae JH |
2719 | const char **arg = &spawn_arg[0]; |
2720 | ||
6973dcae | 2721 | if (one && two) { |
479b0ae8 JK |
2722 | struct diff_tempfile *temp_one, *temp_two; |
2723 | const char *othername = (other ? other : name); | |
2724 | temp_one = prepare_temp_file(name, one); | |
2725 | temp_two = prepare_temp_file(othername, two); | |
6973dcae JH |
2726 | *arg++ = pgm; |
2727 | *arg++ = name; | |
479b0ae8 JK |
2728 | *arg++ = temp_one->name; |
2729 | *arg++ = temp_one->hex; | |
2730 | *arg++ = temp_one->mode; | |
2731 | *arg++ = temp_two->name; | |
2732 | *arg++ = temp_two->hex; | |
2733 | *arg++ = temp_two->mode; | |
6973dcae JH |
2734 | if (other) { |
2735 | *arg++ = other; | |
2736 | *arg++ = xfrm_msg; | |
2737 | } | |
2738 | } else { | |
2739 | *arg++ = pgm; | |
2740 | *arg++ = name; | |
2741 | } | |
2742 | *arg = NULL; | |
d5535ec7 | 2743 | fflush(NULL); |
7ed7fac4 | 2744 | retval = run_command_v_opt(spawn_arg, RUN_USING_SHELL); |
6973dcae JH |
2745 | remove_tempfile(); |
2746 | if (retval) { | |
2747 | fprintf(stderr, "external diff died, stopping at %s.\n", name); | |
2748 | exit(1); | |
2749 | } | |
2750 | } | |
2751 | ||
b67b9612 JH |
2752 | static int similarity_index(struct diff_filepair *p) |
2753 | { | |
2754 | return p->score * 100 / MAX_SCORE; | |
2755 | } | |
2756 | ||
2757 | static void fill_metainfo(struct strbuf *msg, | |
2758 | const char *name, | |
2759 | const char *other, | |
2760 | struct diff_filespec *one, | |
2761 | struct diff_filespec *two, | |
2762 | struct diff_options *o, | |
37466447 | 2763 | struct diff_filepair *p, |
5977744d | 2764 | int *must_show_header, |
37466447 | 2765 | int use_color) |
b67b9612 | 2766 | { |
37466447 BW |
2767 | const char *set = diff_get_color(use_color, DIFF_METAINFO); |
2768 | const char *reset = diff_get_color(use_color, DIFF_RESET); | |
7be57610 BY |
2769 | struct strbuf *msgbuf; |
2770 | char *line_prefix = ""; | |
2771 | ||
296c6bb2 | 2772 | *must_show_header = 1; |
7be57610 BY |
2773 | if (o->output_prefix) { |
2774 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
2775 | line_prefix = msgbuf->buf; | |
2776 | } | |
b67b9612 JH |
2777 | strbuf_init(msg, PATH_MAX * 2 + 300); |
2778 | switch (p->status) { | |
2779 | case DIFF_STATUS_COPIED: | |
98ad90fb JH |
2780 | strbuf_addf(msg, "%s%ssimilarity index %d%%", |
2781 | line_prefix, set, similarity_index(p)); | |
2782 | strbuf_addf(msg, "%s\n%s%scopy from ", | |
2783 | reset, line_prefix, set); | |
b67b9612 | 2784 | quote_c_style(name, msg, NULL, 0); |
98ad90fb | 2785 | strbuf_addf(msg, "%s\n%s%scopy to ", reset, line_prefix, set); |
b67b9612 | 2786 | quote_c_style(other, msg, NULL, 0); |
37466447 | 2787 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 JH |
2788 | break; |
2789 | case DIFF_STATUS_RENAMED: | |
98ad90fb JH |
2790 | strbuf_addf(msg, "%s%ssimilarity index %d%%", |
2791 | line_prefix, set, similarity_index(p)); | |
2792 | strbuf_addf(msg, "%s\n%s%srename from ", | |
2793 | reset, line_prefix, set); | |
b67b9612 | 2794 | quote_c_style(name, msg, NULL, 0); |
98ad90fb JH |
2795 | strbuf_addf(msg, "%s\n%s%srename to ", |
2796 | reset, line_prefix, set); | |
b67b9612 | 2797 | quote_c_style(other, msg, NULL, 0); |
37466447 | 2798 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 JH |
2799 | break; |
2800 | case DIFF_STATUS_MODIFIED: | |
2801 | if (p->score) { | |
98ad90fb JH |
2802 | strbuf_addf(msg, "%s%sdissimilarity index %d%%%s\n", |
2803 | line_prefix, | |
37466447 | 2804 | set, similarity_index(p), reset); |
b67b9612 JH |
2805 | break; |
2806 | } | |
2807 | /* fallthru */ | |
2808 | default: | |
296c6bb2 | 2809 | *must_show_header = 0; |
b67b9612 JH |
2810 | } |
2811 | if (one && two && hashcmp(one->sha1, two->sha1)) { | |
2812 | int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV; | |
2813 | ||
2814 | if (DIFF_OPT_TST(o, BINARY)) { | |
2815 | mmfile_t mf; | |
2816 | if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) || | |
2817 | (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two))) | |
2818 | abbrev = 40; | |
2819 | } | |
e13f38a3 | 2820 | strbuf_addf(msg, "%s%sindex %s..", line_prefix, set, |
3e5a188f JH |
2821 | find_unique_abbrev(one->sha1, abbrev)); |
2822 | strbuf_addstr(msg, find_unique_abbrev(two->sha1, abbrev)); | |
b67b9612 JH |
2823 | if (one->mode == two->mode) |
2824 | strbuf_addf(msg, " %06o", one->mode); | |
37466447 | 2825 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 | 2826 | } |
b67b9612 JH |
2827 | } |
2828 | ||
6973dcae JH |
2829 | static void run_diff_cmd(const char *pgm, |
2830 | const char *name, | |
2831 | const char *other, | |
cd676a51 | 2832 | const char *attr_path, |
6973dcae JH |
2833 | struct diff_filespec *one, |
2834 | struct diff_filespec *two, | |
b67b9612 | 2835 | struct strbuf *msg, |
051308f6 | 2836 | struct diff_options *o, |
b67b9612 | 2837 | struct diff_filepair *p) |
6973dcae | 2838 | { |
b67b9612 JH |
2839 | const char *xfrm_msg = NULL; |
2840 | int complete_rewrite = (p->status == DIFF_STATUS_MODIFIED) && p->score; | |
296c6bb2 | 2841 | int must_show_header = 0; |
b67b9612 | 2842 | |
8f67f8ae | 2843 | if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL)) |
f1af60bd JH |
2844 | pgm = NULL; |
2845 | else { | |
be58e70d JK |
2846 | struct userdiff_driver *drv = userdiff_find_by_path(attr_path); |
2847 | if (drv && drv->external) | |
2848 | pgm = drv->external; | |
f1af60bd JH |
2849 | } |
2850 | ||
37466447 BW |
2851 | if (msg) { |
2852 | /* | |
2853 | * don't use colors when the header is intended for an | |
2854 | * external diff driver | |
2855 | */ | |
2856 | fill_metainfo(msg, name, other, one, two, o, p, | |
5977744d | 2857 | &must_show_header, |
37466447 BW |
2858 | DIFF_OPT_TST(o, COLOR_DIFF) && !pgm); |
2859 | xfrm_msg = msg->len ? msg->buf : NULL; | |
2860 | } | |
2861 | ||
6973dcae JH |
2862 | if (pgm) { |
2863 | run_external_diff(pgm, name, other, one, two, xfrm_msg, | |
2864 | complete_rewrite); | |
2865 | return; | |
2866 | } | |
2867 | if (one && two) | |
2868 | builtin_diff(name, other ? other : name, | |
296c6bb2 CC |
2869 | one, two, xfrm_msg, must_show_header, |
2870 | o, complete_rewrite); | |
6973dcae | 2871 | else |
c0c77734 | 2872 | fprintf(o->file, "* Unmerged path %s\n", name); |
6973dcae JH |
2873 | } |
2874 | ||
2875 | static void diff_fill_sha1_info(struct diff_filespec *one) | |
2876 | { | |
2877 | if (DIFF_FILE_VALID(one)) { | |
2878 | if (!one->sha1_valid) { | |
2879 | struct stat st; | |
5332b2af JS |
2880 | if (!strcmp(one->path, "-")) { |
2881 | hashcpy(one->sha1, null_sha1); | |
2882 | return; | |
2883 | } | |
6973dcae | 2884 | if (lstat(one->path, &st) < 0) |
0721c314 | 2885 | die_errno("stat '%s'", one->path); |
6973dcae | 2886 | if (index_path(one->sha1, one->path, &st, 0)) |
d7530708 | 2887 | die("cannot hash %s", one->path); |
6973dcae JH |
2888 | } |
2889 | } | |
2890 | else | |
e702496e | 2891 | hashclr(one->sha1); |
6973dcae JH |
2892 | } |
2893 | ||
cd676a51 JH |
2894 | static void strip_prefix(int prefix_length, const char **namep, const char **otherp) |
2895 | { | |
2896 | /* Strip the prefix but do not molest /dev/null and absolute paths */ | |
d8faea9d | 2897 | if (*namep && **namep != '/') { |
cd676a51 | 2898 | *namep += prefix_length; |
d8faea9d JN |
2899 | if (**namep == '/') |
2900 | ++*namep; | |
2901 | } | |
2902 | if (*otherp && **otherp != '/') { | |
cd676a51 | 2903 | *otherp += prefix_length; |
d8faea9d JN |
2904 | if (**otherp == '/') |
2905 | ++*otherp; | |
2906 | } | |
cd676a51 JH |
2907 | } |
2908 | ||
6973dcae JH |
2909 | static void run_diff(struct diff_filepair *p, struct diff_options *o) |
2910 | { | |
2911 | const char *pgm = external_diff(); | |
663af342 | 2912 | struct strbuf msg; |
663af342 PH |
2913 | struct diff_filespec *one = p->one; |
2914 | struct diff_filespec *two = p->two; | |
6973dcae JH |
2915 | const char *name; |
2916 | const char *other; | |
cd676a51 | 2917 | const char *attr_path; |
663af342 | 2918 | |
cd676a51 JH |
2919 | name = p->one->path; |
2920 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
2921 | attr_path = name; | |
2922 | if (o->prefix_length) | |
2923 | strip_prefix(o->prefix_length, &name, &other); | |
6973dcae JH |
2924 | |
2925 | if (DIFF_PAIR_UNMERGED(p)) { | |
cd676a51 | 2926 | run_diff_cmd(pgm, name, NULL, attr_path, |
b67b9612 | 2927 | NULL, NULL, NULL, o, p); |
6973dcae JH |
2928 | return; |
2929 | } | |
2930 | ||
6973dcae JH |
2931 | diff_fill_sha1_info(one); |
2932 | diff_fill_sha1_info(two); | |
2933 | ||
6973dcae JH |
2934 | if (!pgm && |
2935 | DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) && | |
2936 | (S_IFMT & one->mode) != (S_IFMT & two->mode)) { | |
b67b9612 JH |
2937 | /* |
2938 | * a filepair that changes between file and symlink | |
6973dcae JH |
2939 | * needs to be split into deletion and creation. |
2940 | */ | |
2941 | struct diff_filespec *null = alloc_filespec(two->path); | |
cd676a51 | 2942 | run_diff_cmd(NULL, name, other, attr_path, |
b67b9612 | 2943 | one, null, &msg, o, p); |
6973dcae | 2944 | free(null); |
b67b9612 JH |
2945 | strbuf_release(&msg); |
2946 | ||
6973dcae | 2947 | null = alloc_filespec(one->path); |
cd676a51 | 2948 | run_diff_cmd(NULL, name, other, attr_path, |
b67b9612 | 2949 | null, two, &msg, o, p); |
6973dcae JH |
2950 | free(null); |
2951 | } | |
2952 | else | |
cd676a51 | 2953 | run_diff_cmd(pgm, name, other, attr_path, |
b67b9612 | 2954 | one, two, &msg, o, p); |
6973dcae | 2955 | |
663af342 | 2956 | strbuf_release(&msg); |
6973dcae JH |
2957 | } |
2958 | ||
2959 | static void run_diffstat(struct diff_filepair *p, struct diff_options *o, | |
2960 | struct diffstat_t *diffstat) | |
2961 | { | |
2962 | const char *name; | |
2963 | const char *other; | |
710158e3 | 2964 | int complete_rewrite = 0; |
6973dcae JH |
2965 | |
2966 | if (DIFF_PAIR_UNMERGED(p)) { | |
2967 | /* unmerged */ | |
0d21efa5 | 2968 | builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, 0); |
6973dcae JH |
2969 | return; |
2970 | } | |
2971 | ||
2972 | name = p->one->path; | |
2973 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
2974 | ||
cd676a51 JH |
2975 | if (o->prefix_length) |
2976 | strip_prefix(o->prefix_length, &name, &other); | |
2977 | ||
6973dcae JH |
2978 | diff_fill_sha1_info(p->one); |
2979 | diff_fill_sha1_info(p->two); | |
2980 | ||
710158e3 JH |
2981 | if (p->status == DIFF_STATUS_MODIFIED && p->score) |
2982 | complete_rewrite = 1; | |
0d21efa5 | 2983 | builtin_diffstat(name, other, p->one, p->two, diffstat, o, complete_rewrite); |
6973dcae JH |
2984 | } |
2985 | ||
88246898 JS |
2986 | static void run_checkdiff(struct diff_filepair *p, struct diff_options *o) |
2987 | { | |
2988 | const char *name; | |
2989 | const char *other; | |
cd676a51 | 2990 | const char *attr_path; |
88246898 JS |
2991 | |
2992 | if (DIFF_PAIR_UNMERGED(p)) { | |
2993 | /* unmerged */ | |
2994 | return; | |
2995 | } | |
2996 | ||
2997 | name = p->one->path; | |
2998 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
cd676a51 JH |
2999 | attr_path = other ? other : name; |
3000 | ||
3001 | if (o->prefix_length) | |
3002 | strip_prefix(o->prefix_length, &name, &other); | |
88246898 JS |
3003 | |
3004 | diff_fill_sha1_info(p->one); | |
3005 | diff_fill_sha1_info(p->two); | |
3006 | ||
cd676a51 | 3007 | builtin_checkdiff(name, other, attr_path, p->one, p->two, o); |
88246898 JS |
3008 | } |
3009 | ||
6973dcae JH |
3010 | void diff_setup(struct diff_options *options) |
3011 | { | |
be4f2b40 | 3012 | memcpy(options, &default_diff_options, sizeof(*options)); |
c0c77734 DB |
3013 | |
3014 | options->file = stdout; | |
3015 | ||
6973dcae JH |
3016 | options->line_termination = '\n'; |
3017 | options->break_opt = -1; | |
3018 | options->rename_limit = -1; | |
712d2c7d | 3019 | options->dirstat_permille = diff_dirstat_permille_default; |
ee1e5412 | 3020 | options->context = 3; |
6973dcae JH |
3021 | |
3022 | options->change = diff_change; | |
3023 | options->add_remove = diff_addremove; | |
6b2f2d98 | 3024 | if (diff_use_color_default > 0) |
8f67f8ae | 3025 | DIFF_OPT_SET(options, COLOR_DIFF); |
b68ea12e | 3026 | options->detect_rename = diff_detect_rename_default; |
eab9a40b | 3027 | |
f89504dd EC |
3028 | if (diff_no_prefix) { |
3029 | options->a_prefix = options->b_prefix = ""; | |
3030 | } else if (!diff_mnemonic_prefix) { | |
a5a818ee JH |
3031 | options->a_prefix = "a/"; |
3032 | options->b_prefix = "b/"; | |
3033 | } | |
6973dcae JH |
3034 | } |
3035 | ||
3036 | int diff_setup_done(struct diff_options *options) | |
3037 | { | |
d7de00f7 TH |
3038 | int count = 0; |
3039 | ||
3040 | if (options->output_format & DIFF_FORMAT_NAME) | |
3041 | count++; | |
3042 | if (options->output_format & DIFF_FORMAT_NAME_STATUS) | |
3043 | count++; | |
3044 | if (options->output_format & DIFF_FORMAT_CHECKDIFF) | |
3045 | count++; | |
3046 | if (options->output_format & DIFF_FORMAT_NO_OUTPUT) | |
3047 | count++; | |
3048 | if (count > 1) | |
3049 | die("--name-only, --name-status, --check and -s are mutually exclusive"); | |
3050 | ||
f245194f JH |
3051 | /* |
3052 | * Most of the time we can say "there are changes" | |
3053 | * only by checking if there are changed paths, but | |
3054 | * --ignore-whitespace* options force us to look | |
97bf2a08 | 3055 | * inside contents. |
f245194f JH |
3056 | */ |
3057 | ||
3058 | if (DIFF_XDL_TST(options, IGNORE_WHITESPACE) || | |
3059 | DIFF_XDL_TST(options, IGNORE_WHITESPACE_CHANGE) || | |
3060 | DIFF_XDL_TST(options, IGNORE_WHITESPACE_AT_EOL)) | |
3061 | DIFF_OPT_SET(options, DIFF_FROM_CONTENTS); | |
3062 | else | |
3063 | DIFF_OPT_CLR(options, DIFF_FROM_CONTENTS); | |
3064 | ||
8f67f8ae | 3065 | if (DIFF_OPT_TST(options, FIND_COPIES_HARDER)) |
03b9d560 JH |
3066 | options->detect_rename = DIFF_DETECT_COPY; |
3067 | ||
cd676a51 JH |
3068 | if (!DIFF_OPT_TST(options, RELATIVE_NAME)) |
3069 | options->prefix = NULL; | |
3070 | if (options->prefix) | |
3071 | options->prefix_length = strlen(options->prefix); | |
3072 | else | |
3073 | options->prefix_length = 0; | |
3074 | ||
c6744349 TH |
3075 | if (options->output_format & (DIFF_FORMAT_NAME | |
3076 | DIFF_FORMAT_NAME_STATUS | | |
3077 | DIFF_FORMAT_CHECKDIFF | | |
3078 | DIFF_FORMAT_NO_OUTPUT)) | |
3079 | options->output_format &= ~(DIFF_FORMAT_RAW | | |
74e2abe5 | 3080 | DIFF_FORMAT_NUMSTAT | |
c6744349 | 3081 | DIFF_FORMAT_DIFFSTAT | |
ebd124c6 | 3082 | DIFF_FORMAT_SHORTSTAT | |
7df7c019 | 3083 | DIFF_FORMAT_DIRSTAT | |
c6744349 TH |
3084 | DIFF_FORMAT_SUMMARY | |
3085 | DIFF_FORMAT_PATCH); | |
3086 | ||
6973dcae JH |
3087 | /* |
3088 | * These cases always need recursive; we do not drop caller-supplied | |
3089 | * recursive bits for other formats here. | |
3090 | */ | |
c6744349 | 3091 | if (options->output_format & (DIFF_FORMAT_PATCH | |
74e2abe5 | 3092 | DIFF_FORMAT_NUMSTAT | |
c6744349 | 3093 | DIFF_FORMAT_DIFFSTAT | |
ebd124c6 | 3094 | DIFF_FORMAT_SHORTSTAT | |
7df7c019 | 3095 | DIFF_FORMAT_DIRSTAT | |
d7014dc0 | 3096 | DIFF_FORMAT_SUMMARY | |
c6744349 | 3097 | DIFF_FORMAT_CHECKDIFF)) |
8f67f8ae | 3098 | DIFF_OPT_SET(options, RECURSIVE); |
5e363541 | 3099 | /* |
3969cf7d | 3100 | * Also pickaxe would not work very well if you do not say recursive |
5e363541 | 3101 | */ |
3969cf7d | 3102 | if (options->pickaxe) |
8f67f8ae | 3103 | DIFF_OPT_SET(options, RECURSIVE); |
ae6d5c1b JL |
3104 | /* |
3105 | * When patches are generated, submodules diffed against the work tree | |
3106 | * must be checked for dirtiness too so it can be shown in the output | |
3107 | */ | |
3108 | if (options->output_format & DIFF_FORMAT_PATCH) | |
3109 | DIFF_OPT_SET(options, DIRTY_SUBMODULES); | |
5e363541 | 3110 | |
6973dcae JH |
3111 | if (options->detect_rename && options->rename_limit < 0) |
3112 | options->rename_limit = diff_rename_limit_default; | |
3113 | if (options->setup & DIFF_SETUP_USE_CACHE) { | |
3114 | if (!active_cache) | |
3115 | /* read-cache does not die even when it fails | |
3116 | * so it is safe for us to do this here. Also | |
3117 | * it does not smudge active_cache or active_nr | |
3118 | * when it fails, so we do not have to worry about | |
3119 | * cleaning it up ourselves either. | |
3120 | */ | |
3121 | read_cache(); | |
3122 | } | |
6973dcae JH |
3123 | if (options->abbrev <= 0 || 40 < options->abbrev) |
3124 | options->abbrev = 40; /* full */ | |
3125 | ||
68aacb2f JH |
3126 | /* |
3127 | * It does not make sense to show the first hit we happened | |
3128 | * to have found. It does not make sense not to return with | |
3129 | * exit code in such a case either. | |
3130 | */ | |
90b19941 | 3131 | if (DIFF_OPT_TST(options, QUICK)) { |
68aacb2f | 3132 | options->output_format = DIFF_FORMAT_NO_OUTPUT; |
8f67f8ae | 3133 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); |
68aacb2f JH |
3134 | } |
3135 | ||
6973dcae JH |
3136 | return 0; |
3137 | } | |
3138 | ||
d2543b8e | 3139 | static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val) |
ee1e5412 LT |
3140 | { |
3141 | char c, *eq; | |
3142 | int len; | |
3143 | ||
3144 | if (*arg != '-') | |
3145 | return 0; | |
3146 | c = *++arg; | |
3147 | if (!c) | |
3148 | return 0; | |
3149 | if (c == arg_short) { | |
3150 | c = *++arg; | |
3151 | if (!c) | |
3152 | return 1; | |
3153 | if (val && isdigit(c)) { | |
3154 | char *end; | |
3155 | int n = strtoul(arg, &end, 10); | |
3156 | if (*end) | |
3157 | return 0; | |
3158 | *val = n; | |
3159 | return 1; | |
3160 | } | |
3161 | return 0; | |
3162 | } | |
3163 | if (c != '-') | |
3164 | return 0; | |
3165 | arg++; | |
3166 | eq = strchr(arg, '='); | |
3167 | if (eq) | |
3168 | len = eq - arg; | |
3169 | else | |
3170 | len = strlen(arg); | |
3171 | if (!len || strncmp(arg, arg_long, len)) | |
3172 | return 0; | |
3173 | if (eq) { | |
3174 | int n; | |
3175 | char *end; | |
3176 | if (!isdigit(*++eq)) | |
3177 | return 0; | |
3178 | n = strtoul(eq, &end, 10); | |
3179 | if (*end) | |
3180 | return 0; | |
3181 | *val = n; | |
3182 | } | |
3183 | return 1; | |
3184 | } | |
3185 | ||
16befb8b JH |
3186 | static int diff_scoreopt_parse(const char *opt); |
3187 | ||
dea007fb MM |
3188 | static inline int short_opt(char opt, const char **argv, |
3189 | const char **optarg) | |
3190 | { | |
3191 | const char *arg = argv[0]; | |
3192 | if (arg[0] != '-' || arg[1] != opt) | |
3193 | return 0; | |
3194 | if (arg[2] != '\0') { | |
3195 | *optarg = arg + 2; | |
3196 | return 1; | |
3197 | } | |
3198 | if (!argv[1]) | |
3199 | die("Option '%c' requires a value", opt); | |
3200 | *optarg = argv[1]; | |
3201 | return 2; | |
3202 | } | |
3203 | ||
3204 | int parse_long_opt(const char *opt, const char **argv, | |
3205 | const char **optarg) | |
3206 | { | |
3207 | const char *arg = argv[0]; | |
3208 | if (arg[0] != '-' || arg[1] != '-') | |
3209 | return 0; | |
3210 | arg += strlen("--"); | |
3211 | if (prefixcmp(arg, opt)) | |
3212 | return 0; | |
3213 | arg += strlen(opt); | |
3214 | if (*arg == '=') { /* sticked form: --option=value */ | |
3215 | *optarg = arg + 1; | |
3216 | return 1; | |
3217 | } | |
3218 | if (*arg != '\0') | |
3219 | return 0; | |
3220 | /* separate form: --option value */ | |
3221 | if (!argv[1]) | |
3222 | die("Option '--%s' requires a value", opt); | |
3223 | *optarg = argv[1]; | |
3224 | return 2; | |
3225 | } | |
3226 | ||
4d7f7a4a JN |
3227 | static int stat_opt(struct diff_options *options, const char **av) |
3228 | { | |
3229 | const char *arg = av[0]; | |
3230 | char *end; | |
3231 | int width = options->stat_width; | |
3232 | int name_width = options->stat_name_width; | |
808e1db2 | 3233 | int count = options->stat_count; |
1e57208e | 3234 | int argcount = 1; |
4d7f7a4a JN |
3235 | |
3236 | arg += strlen("--stat"); | |
3237 | end = (char *)arg; | |
3238 | ||
3239 | switch (*arg) { | |
3240 | case '-': | |
1e57208e MM |
3241 | if (!prefixcmp(arg, "-width")) { |
3242 | arg += strlen("-width"); | |
3243 | if (*arg == '=') | |
3244 | width = strtoul(arg + 1, &end, 10); | |
3245 | else if (!*arg && !av[1]) | |
3246 | die("Option '--stat-width' requires a value"); | |
3247 | else if (!*arg) { | |
3248 | width = strtoul(av[1], &end, 10); | |
3249 | argcount = 2; | |
3250 | } | |
3251 | } else if (!prefixcmp(arg, "-name-width")) { | |
3252 | arg += strlen("-name-width"); | |
3253 | if (*arg == '=') | |
3254 | name_width = strtoul(arg + 1, &end, 10); | |
3255 | else if (!*arg && !av[1]) | |
3256 | die("Option '--stat-name-width' requires a value"); | |
3257 | else if (!*arg) { | |
3258 | name_width = strtoul(av[1], &end, 10); | |
3259 | argcount = 2; | |
3260 | } | |
808e1db2 MG |
3261 | } else if (!prefixcmp(arg, "-count")) { |
3262 | arg += strlen("-count"); | |
3263 | if (*arg == '=') | |
3264 | count = strtoul(arg + 1, &end, 10); | |
3265 | else if (!*arg && !av[1]) | |
3266 | die("Option '--stat-count' requires a value"); | |
3267 | else if (!*arg) { | |
3268 | count = strtoul(av[1], &end, 10); | |
3269 | argcount = 2; | |
3270 | } | |
1e57208e | 3271 | } |
4d7f7a4a JN |
3272 | break; |
3273 | case '=': | |
3274 | width = strtoul(arg+1, &end, 10); | |
3275 | if (*end == ',') | |
3276 | name_width = strtoul(end+1, &end, 10); | |
808e1db2 MG |
3277 | if (*end == ',') |
3278 | count = strtoul(end+1, &end, 10); | |
4d7f7a4a JN |
3279 | } |
3280 | ||
3281 | /* Important! This checks all the error cases! */ | |
3282 | if (*end) | |
3283 | return 0; | |
3284 | options->output_format |= DIFF_FORMAT_DIFFSTAT; | |
3285 | options->stat_name_width = name_width; | |
3286 | options->stat_width = width; | |
808e1db2 | 3287 | options->stat_count = count; |
1e57208e | 3288 | return argcount; |
4d7f7a4a JN |
3289 | } |
3290 | ||
333f3fb0 JH |
3291 | static int parse_dirstat_opt(struct diff_options *options, const char *params) |
3292 | { | |
51670fc8 JH |
3293 | struct strbuf errmsg = STRBUF_INIT; |
3294 | if (parse_dirstat_params(options, params, &errmsg)) | |
7478ac57 | 3295 | die(_("Failed to parse --dirstat/-X option parameter:\n%s"), |
51670fc8 JH |
3296 | errmsg.buf); |
3297 | strbuf_release(&errmsg); | |
333f3fb0 JH |
3298 | /* |
3299 | * The caller knows a dirstat-related option is given from the command | |
3300 | * line; allow it to say "return this_function();" | |
3301 | */ | |
3302 | options->output_format |= DIFF_FORMAT_DIRSTAT; | |
3303 | return 1; | |
3304 | } | |
3305 | ||
6973dcae JH |
3306 | int diff_opt_parse(struct diff_options *options, const char **av, int ac) |
3307 | { | |
3308 | const char *arg = av[0]; | |
dea007fb MM |
3309 | const char *optarg; |
3310 | int argcount; | |
d054680c PH |
3311 | |
3312 | /* Output format options */ | |
1c9eecff | 3313 | if (!strcmp(arg, "-p") || !strcmp(arg, "-u") || !strcmp(arg, "--patch")) |
c6744349 | 3314 | options->output_format |= DIFF_FORMAT_PATCH; |
ee1e5412 | 3315 | else if (opt_arg(arg, 'U', "unified", &options->context)) |
c6744349 | 3316 | options->output_format |= DIFF_FORMAT_PATCH; |
a610786f TH |
3317 | else if (!strcmp(arg, "--raw")) |
3318 | options->output_format |= DIFF_FORMAT_RAW; | |
8f67f8ae | 3319 | else if (!strcmp(arg, "--patch-with-raw")) |
c6744349 | 3320 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_RAW; |
8f67f8ae | 3321 | else if (!strcmp(arg, "--numstat")) |
74e2abe5 | 3322 | options->output_format |= DIFF_FORMAT_NUMSTAT; |
8f67f8ae | 3323 | else if (!strcmp(arg, "--shortstat")) |
ebd124c6 | 3324 | options->output_format |= DIFF_FORMAT_SHORTSTAT; |
333f3fb0 JH |
3325 | else if (!strcmp(arg, "-X") || !strcmp(arg, "--dirstat")) |
3326 | return parse_dirstat_opt(options, ""); | |
3327 | else if (!prefixcmp(arg, "-X")) | |
3328 | return parse_dirstat_opt(options, arg + 2); | |
3329 | else if (!prefixcmp(arg, "--dirstat=")) | |
3330 | return parse_dirstat_opt(options, arg + 10); | |
3331 | else if (!strcmp(arg, "--cumulative")) | |
3332 | return parse_dirstat_opt(options, "cumulative"); | |
3333 | else if (!strcmp(arg, "--dirstat-by-file")) | |
3334 | return parse_dirstat_opt(options, "files"); | |
3335 | else if (!prefixcmp(arg, "--dirstat-by-file=")) { | |
3336 | parse_dirstat_opt(options, "files"); | |
3337 | return parse_dirstat_opt(options, arg + 18); | |
f88d225f | 3338 | } |
d054680c PH |
3339 | else if (!strcmp(arg, "--check")) |
3340 | options->output_format |= DIFF_FORMAT_CHECKDIFF; | |
3341 | else if (!strcmp(arg, "--summary")) | |
3342 | options->output_format |= DIFF_FORMAT_SUMMARY; | |
3343 | else if (!strcmp(arg, "--patch-with-stat")) | |
3344 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_DIFFSTAT; | |
3345 | else if (!strcmp(arg, "--name-only")) | |
3346 | options->output_format |= DIFF_FORMAT_NAME; | |
3347 | else if (!strcmp(arg, "--name-status")) | |
3348 | options->output_format |= DIFF_FORMAT_NAME_STATUS; | |
3349 | else if (!strcmp(arg, "-s")) | |
3350 | options->output_format |= DIFF_FORMAT_NO_OUTPUT; | |
4d7f7a4a | 3351 | else if (!prefixcmp(arg, "--stat")) |
808e1db2 | 3352 | /* --stat, --stat-width, --stat-name-width, or --stat-count */ |
4d7f7a4a | 3353 | return stat_opt(options, av); |
d054680c PH |
3354 | |
3355 | /* renames options */ | |
37ab5156 KB |
3356 | else if (!prefixcmp(arg, "-B") || !prefixcmp(arg, "--break-rewrites=") || |
3357 | !strcmp(arg, "--break-rewrites")) { | |
8f67f8ae | 3358 | if ((options->break_opt = diff_scoreopt_parse(arg)) == -1) |
07cd7265 | 3359 | return error("invalid argument to -B: %s", arg+2); |
6973dcae | 3360 | } |
f611ddc7 YD |
3361 | else if (!prefixcmp(arg, "-M") || !prefixcmp(arg, "--find-renames=") || |
3362 | !strcmp(arg, "--find-renames")) { | |
8f67f8ae | 3363 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) |
07cd7265 | 3364 | return error("invalid argument to -M: %s", arg+2); |
6973dcae JH |
3365 | options->detect_rename = DIFF_DETECT_RENAME; |
3366 | } | |
467ddc14 JH |
3367 | else if (!strcmp(arg, "-D") || !strcmp(arg, "--irreversible-delete")) { |
3368 | options->irreversible_delete = 1; | |
3369 | } | |
f611ddc7 YD |
3370 | else if (!prefixcmp(arg, "-C") || !prefixcmp(arg, "--find-copies=") || |
3371 | !strcmp(arg, "--find-copies")) { | |
ca6c0970 | 3372 | if (options->detect_rename == DIFF_DETECT_COPY) |
8f67f8ae PH |
3373 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); |
3374 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) | |
07cd7265 | 3375 | return error("invalid argument to -C: %s", arg+2); |
6973dcae JH |
3376 | options->detect_rename = DIFF_DETECT_COPY; |
3377 | } | |
d054680c PH |
3378 | else if (!strcmp(arg, "--no-renames")) |
3379 | options->detect_rename = 0; | |
cd676a51 JH |
3380 | else if (!strcmp(arg, "--relative")) |
3381 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
c0cb4a06 JH |
3382 | else if (!prefixcmp(arg, "--relative=")) { |
3383 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
3384 | options->prefix = arg + 11; | |
3385 | } | |
d054680c PH |
3386 | |
3387 | /* xdiff options */ | |
3388 | else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space")) | |
628d5c2b | 3389 | DIFF_XDL_SET(options, IGNORE_WHITESPACE); |
d054680c | 3390 | else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change")) |
628d5c2b | 3391 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_CHANGE); |
d054680c | 3392 | else if (!strcmp(arg, "--ignore-space-at-eol")) |
628d5c2b | 3393 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_AT_EOL); |
34292bdd | 3394 | else if (!strcmp(arg, "--patience")) |
628d5c2b | 3395 | DIFF_XDL_SET(options, PATIENCE_DIFF); |
8c912eea TRC |
3396 | else if (!strcmp(arg, "--histogram")) |
3397 | DIFF_XDL_SET(options, HISTOGRAM_DIFF); | |
d054680c PH |
3398 | |
3399 | /* flags options */ | |
3400 | else if (!strcmp(arg, "--binary")) { | |
3401 | options->output_format |= DIFF_FORMAT_PATCH; | |
3402 | DIFF_OPT_SET(options, BINARY); | |
3403 | } | |
3404 | else if (!strcmp(arg, "--full-index")) | |
3405 | DIFF_OPT_SET(options, FULL_INDEX); | |
3406 | else if (!strcmp(arg, "-a") || !strcmp(arg, "--text")) | |
3407 | DIFF_OPT_SET(options, TEXT); | |
3408 | else if (!strcmp(arg, "-R")) | |
3409 | DIFF_OPT_SET(options, REVERSE_DIFF); | |
6973dcae | 3410 | else if (!strcmp(arg, "--find-copies-harder")) |
8f67f8ae | 3411 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); |
750f7b66 | 3412 | else if (!strcmp(arg, "--follow")) |
8f67f8ae | 3413 | DIFF_OPT_SET(options, FOLLOW_RENAMES); |
cd112cef | 3414 | else if (!strcmp(arg, "--color")) |
8f67f8ae | 3415 | DIFF_OPT_SET(options, COLOR_DIFF); |
73e9da01 ML |
3416 | else if (!prefixcmp(arg, "--color=")) { |
3417 | int value = git_config_colorbool(NULL, arg+8, -1); | |
3418 | if (value == 0) | |
3419 | DIFF_OPT_CLR(options, COLOR_DIFF); | |
3420 | else if (value > 0) | |
3421 | DIFF_OPT_SET(options, COLOR_DIFF); | |
3422 | else | |
3423 | return error("option `color' expects \"always\", \"auto\", or \"never\""); | |
3424 | } | |
fef88bb0 | 3425 | else if (!strcmp(arg, "--no-color")) |
8f67f8ae | 3426 | DIFF_OPT_CLR(options, COLOR_DIFF); |
628d5c2b KC |
3427 | else if (!strcmp(arg, "--color-words")) { |
3428 | DIFF_OPT_SET(options, COLOR_DIFF); | |
882749a0 | 3429 | options->word_diff = DIFF_WORDS_COLOR; |
628d5c2b | 3430 | } |
2b6a5417 | 3431 | else if (!prefixcmp(arg, "--color-words=")) { |
628d5c2b | 3432 | DIFF_OPT_SET(options, COLOR_DIFF); |
882749a0 | 3433 | options->word_diff = DIFF_WORDS_COLOR; |
2b6a5417 JS |
3434 | options->word_regex = arg + 14; |
3435 | } | |
882749a0 TR |
3436 | else if (!strcmp(arg, "--word-diff")) { |
3437 | if (options->word_diff == DIFF_WORDS_NONE) | |
3438 | options->word_diff = DIFF_WORDS_PLAIN; | |
3439 | } | |
3440 | else if (!prefixcmp(arg, "--word-diff=")) { | |
3441 | const char *type = arg + 12; | |
3442 | if (!strcmp(type, "plain")) | |
3443 | options->word_diff = DIFF_WORDS_PLAIN; | |
3444 | else if (!strcmp(type, "color")) { | |
3445 | DIFF_OPT_SET(options, COLOR_DIFF); | |
3446 | options->word_diff = DIFF_WORDS_COLOR; | |
3447 | } | |
3448 | else if (!strcmp(type, "porcelain")) | |
3449 | options->word_diff = DIFF_WORDS_PORCELAIN; | |
3450 | else if (!strcmp(type, "none")) | |
3451 | options->word_diff = DIFF_WORDS_NONE; | |
3452 | else | |
3453 | die("bad --word-diff argument: %s", type); | |
3454 | } | |
dea007fb | 3455 | else if ((argcount = parse_long_opt("word-diff-regex", av, &optarg))) { |
882749a0 TR |
3456 | if (options->word_diff == DIFF_WORDS_NONE) |
3457 | options->word_diff = DIFF_WORDS_PLAIN; | |
dea007fb MM |
3458 | options->word_regex = optarg; |
3459 | return argcount; | |
882749a0 | 3460 | } |
41bbf9d5 | 3461 | else if (!strcmp(arg, "--exit-code")) |
8f67f8ae | 3462 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); |
68aacb2f | 3463 | else if (!strcmp(arg, "--quiet")) |
90b19941 | 3464 | DIFF_OPT_SET(options, QUICK); |
72909bef | 3465 | else if (!strcmp(arg, "--ext-diff")) |
8f67f8ae | 3466 | DIFF_OPT_SET(options, ALLOW_EXTERNAL); |
72909bef | 3467 | else if (!strcmp(arg, "--no-ext-diff")) |
8f67f8ae | 3468 | DIFF_OPT_CLR(options, ALLOW_EXTERNAL); |
e10ea812 JK |
3469 | else if (!strcmp(arg, "--textconv")) |
3470 | DIFF_OPT_SET(options, ALLOW_TEXTCONV); | |
3471 | else if (!strcmp(arg, "--no-textconv")) | |
3472 | DIFF_OPT_CLR(options, ALLOW_TEXTCONV); | |
aee9c7d6 JL |
3473 | else if (!strcmp(arg, "--ignore-submodules")) { |
3474 | DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); | |
46a958b3 | 3475 | handle_ignore_submodules_arg(options, "all"); |
aee9c7d6 JL |
3476 | } else if (!prefixcmp(arg, "--ignore-submodules=")) { |
3477 | DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); | |
46a958b3 | 3478 | handle_ignore_submodules_arg(options, arg + 20); |
aee9c7d6 | 3479 | } else if (!strcmp(arg, "--submodule")) |
752c0c24 JS |
3480 | DIFF_OPT_SET(options, SUBMODULE_LOG); |
3481 | else if (!prefixcmp(arg, "--submodule=")) { | |
3482 | if (!strcmp(arg + 12, "log")) | |
3483 | DIFF_OPT_SET(options, SUBMODULE_LOG); | |
3484 | } | |
d054680c PH |
3485 | |
3486 | /* misc options */ | |
3487 | else if (!strcmp(arg, "-z")) | |
3488 | options->line_termination = 0; | |
dea007fb MM |
3489 | else if ((argcount = short_opt('l', av, &optarg))) { |
3490 | options->rename_limit = strtoul(optarg, NULL, 10); | |
3491 | return argcount; | |
3492 | } | |
3493 | else if ((argcount = short_opt('S', av, &optarg))) { | |
3494 | options->pickaxe = optarg; | |
f506b8e8 JH |
3495 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_S; |
3496 | return argcount; | |
3497 | } else if ((argcount = short_opt('G', av, &optarg))) { | |
3498 | options->pickaxe = optarg; | |
3499 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_G; | |
dea007fb MM |
3500 | return argcount; |
3501 | } | |
d054680c | 3502 | else if (!strcmp(arg, "--pickaxe-all")) |
f506b8e8 | 3503 | options->pickaxe_opts |= DIFF_PICKAXE_ALL; |
d054680c | 3504 | else if (!strcmp(arg, "--pickaxe-regex")) |
f506b8e8 | 3505 | options->pickaxe_opts |= DIFF_PICKAXE_REGEX; |
dea007fb MM |
3506 | else if ((argcount = short_opt('O', av, &optarg))) { |
3507 | options->orderfile = optarg; | |
3508 | return argcount; | |
3509 | } | |
3510 | else if ((argcount = parse_long_opt("diff-filter", av, &optarg))) { | |
3511 | options->filter = optarg; | |
3512 | return argcount; | |
3513 | } | |
d054680c PH |
3514 | else if (!strcmp(arg, "--abbrev")) |
3515 | options->abbrev = DEFAULT_ABBREV; | |
3516 | else if (!prefixcmp(arg, "--abbrev=")) { | |
3517 | options->abbrev = strtoul(arg + 9, NULL, 10); | |
3518 | if (options->abbrev < MINIMUM_ABBREV) | |
3519 | options->abbrev = MINIMUM_ABBREV; | |
3520 | else if (40 < options->abbrev) | |
3521 | options->abbrev = 40; | |
3522 | } | |
dea007fb MM |
3523 | else if ((argcount = parse_long_opt("src-prefix", av, &optarg))) { |
3524 | options->a_prefix = optarg; | |
3525 | return argcount; | |
3526 | } | |
3527 | else if ((argcount = parse_long_opt("dst-prefix", av, &optarg))) { | |
3528 | options->b_prefix = optarg; | |
3529 | return argcount; | |
3530 | } | |
eab9a40b JS |
3531 | else if (!strcmp(arg, "--no-prefix")) |
3532 | options->a_prefix = options->b_prefix = ""; | |
6d0e674a RS |
3533 | else if (opt_arg(arg, '\0', "inter-hunk-context", |
3534 | &options->interhunkcontext)) | |
3535 | ; | |
dea007fb MM |
3536 | else if ((argcount = parse_long_opt("output", av, &optarg))) { |
3537 | options->file = fopen(optarg, "w"); | |
8324b977 | 3538 | if (!options->file) |
9ec26eb7 | 3539 | die_errno("Could not open '%s'", optarg); |
c0c77734 | 3540 | options->close_file = 1; |
dea007fb | 3541 | return argcount; |
c0c77734 | 3542 | } else |
6973dcae JH |
3543 | return 0; |
3544 | return 1; | |
3545 | } | |
3546 | ||
10ae7526 | 3547 | int parse_rename_score(const char **cp_p) |
6973dcae JH |
3548 | { |
3549 | unsigned long num, scale; | |
3550 | int ch, dot; | |
3551 | const char *cp = *cp_p; | |
3552 | ||
3553 | num = 0; | |
3554 | scale = 1; | |
3555 | dot = 0; | |
eeefa7c9 | 3556 | for (;;) { |
6973dcae JH |
3557 | ch = *cp; |
3558 | if ( !dot && ch == '.' ) { | |
3559 | scale = 1; | |
3560 | dot = 1; | |
3561 | } else if ( ch == '%' ) { | |
3562 | scale = dot ? scale*100 : 100; | |
3563 | cp++; /* % is always at the end */ | |
3564 | break; | |
3565 | } else if ( ch >= '0' && ch <= '9' ) { | |
3566 | if ( scale < 100000 ) { | |
3567 | scale *= 10; | |
3568 | num = (num*10) + (ch-'0'); | |
3569 | } | |
3570 | } else { | |
3571 | break; | |
3572 | } | |
3573 | cp++; | |
3574 | } | |
3575 | *cp_p = cp; | |
3576 | ||
3577 | /* user says num divided by scale and we say internally that | |
3578 | * is MAX_SCORE * num / scale. | |
3579 | */ | |
dc49cd76 | 3580 | return (int)((num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale)); |
6973dcae JH |
3581 | } |
3582 | ||
16befb8b | 3583 | static int diff_scoreopt_parse(const char *opt) |
6973dcae JH |
3584 | { |
3585 | int opt1, opt2, cmd; | |
3586 | ||
3587 | if (*opt++ != '-') | |
3588 | return -1; | |
3589 | cmd = *opt++; | |
37ab5156 KB |
3590 | if (cmd == '-') { |
3591 | /* convert the long-form arguments into short-form versions */ | |
3592 | if (!prefixcmp(opt, "break-rewrites")) { | |
3593 | opt += strlen("break-rewrites"); | |
3594 | if (*opt == 0 || *opt++ == '=') | |
3595 | cmd = 'B'; | |
f611ddc7 YD |
3596 | } else if (!prefixcmp(opt, "find-copies")) { |
3597 | opt += strlen("find-copies"); | |
37ab5156 KB |
3598 | if (*opt == 0 || *opt++ == '=') |
3599 | cmd = 'C'; | |
f611ddc7 YD |
3600 | } else if (!prefixcmp(opt, "find-renames")) { |
3601 | opt += strlen("find-renames"); | |
37ab5156 KB |
3602 | if (*opt == 0 || *opt++ == '=') |
3603 | cmd = 'M'; | |
3604 | } | |
3605 | } | |
6973dcae JH |
3606 | if (cmd != 'M' && cmd != 'C' && cmd != 'B') |
3607 | return -1; /* that is not a -M, -C nor -B option */ | |
3608 | ||
10ae7526 | 3609 | opt1 = parse_rename_score(&opt); |
6973dcae JH |
3610 | if (cmd != 'B') |
3611 | opt2 = 0; | |
3612 | else { | |
3613 | if (*opt == 0) | |
3614 | opt2 = 0; | |
3615 | else if (*opt != '/') | |
3616 | return -1; /* we expect -B80/99 or -B80 */ | |
3617 | else { | |
3618 | opt++; | |
10ae7526 | 3619 | opt2 = parse_rename_score(&opt); |
6973dcae JH |
3620 | } |
3621 | } | |
3622 | if (*opt != 0) | |
3623 | return -1; | |
3624 | return opt1 | (opt2 << 16); | |
3625 | } | |
3626 | ||
3627 | struct diff_queue_struct diff_queued_diff; | |
3628 | ||
3629 | void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) | |
3630 | { | |
3631 | if (queue->alloc <= queue->nr) { | |
3632 | queue->alloc = alloc_nr(queue->alloc); | |
3633 | queue->queue = xrealloc(queue->queue, | |
3634 | sizeof(dp) * queue->alloc); | |
3635 | } | |
3636 | queue->queue[queue->nr++] = dp; | |
3637 | } | |
3638 | ||
3639 | struct diff_filepair *diff_queue(struct diff_queue_struct *queue, | |
3640 | struct diff_filespec *one, | |
3641 | struct diff_filespec *two) | |
3642 | { | |
ef677686 | 3643 | struct diff_filepair *dp = xcalloc(1, sizeof(*dp)); |
6973dcae JH |
3644 | dp->one = one; |
3645 | dp->two = two; | |
6973dcae JH |
3646 | if (queue) |
3647 | diff_q(queue, dp); | |
3648 | return dp; | |
3649 | } | |
3650 | ||
3651 | void diff_free_filepair(struct diff_filepair *p) | |
3652 | { | |
9fb88419 LT |
3653 | free_filespec(p->one); |
3654 | free_filespec(p->two); | |
6973dcae JH |
3655 | free(p); |
3656 | } | |
3657 | ||
3658 | /* This is different from find_unique_abbrev() in that | |
3659 | * it stuffs the result with dots for alignment. | |
3660 | */ | |
3661 | const char *diff_unique_abbrev(const unsigned char *sha1, int len) | |
3662 | { | |
3663 | int abblen; | |
3664 | const char *abbrev; | |
3665 | if (len == 40) | |
3666 | return sha1_to_hex(sha1); | |
3667 | ||
3668 | abbrev = find_unique_abbrev(sha1, len); | |
6973dcae JH |
3669 | abblen = strlen(abbrev); |
3670 | if (abblen < 37) { | |
3671 | static char hex[41]; | |
3672 | if (len < abblen && abblen <= len + 2) | |
3673 | sprintf(hex, "%s%.*s", abbrev, len+3-abblen, ".."); | |
3674 | else | |
3675 | sprintf(hex, "%s...", abbrev); | |
3676 | return hex; | |
3677 | } | |
3678 | return sha1_to_hex(sha1); | |
3679 | } | |
3680 | ||
663af342 | 3681 | static void diff_flush_raw(struct diff_filepair *p, struct diff_options *opt) |
6973dcae | 3682 | { |
663af342 PH |
3683 | int line_termination = opt->line_termination; |
3684 | int inter_name_termination = line_termination ? '\t' : '\0'; | |
7be57610 BY |
3685 | if (opt->output_prefix) { |
3686 | struct strbuf *msg = NULL; | |
3687 | msg = opt->output_prefix(opt, opt->output_prefix_data); | |
3688 | fprintf(opt->file, "%s", msg->buf); | |
3689 | } | |
6973dcae | 3690 | |
663af342 | 3691 | if (!(opt->output_format & DIFF_FORMAT_NAME_STATUS)) { |
c0c77734 DB |
3692 | fprintf(opt->file, ":%06o %06o %s ", p->one->mode, p->two->mode, |
3693 | diff_unique_abbrev(p->one->sha1, opt->abbrev)); | |
3694 | fprintf(opt->file, "%s ", diff_unique_abbrev(p->two->sha1, opt->abbrev)); | |
6973dcae | 3695 | } |
663af342 | 3696 | if (p->score) { |
c0c77734 DB |
3697 | fprintf(opt->file, "%c%03d%c", p->status, similarity_index(p), |
3698 | inter_name_termination); | |
663af342 | 3699 | } else { |
c0c77734 | 3700 | fprintf(opt->file, "%c%c", p->status, inter_name_termination); |
6973dcae | 3701 | } |
6973dcae | 3702 | |
cd676a51 JH |
3703 | if (p->status == DIFF_STATUS_COPIED || |
3704 | p->status == DIFF_STATUS_RENAMED) { | |
3705 | const char *name_a, *name_b; | |
3706 | name_a = p->one->path; | |
3707 | name_b = p->two->path; | |
3708 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 DB |
3709 | write_name_quoted(name_a, opt->file, inter_name_termination); |
3710 | write_name_quoted(name_b, opt->file, line_termination); | |
663af342 | 3711 | } else { |
cd676a51 JH |
3712 | const char *name_a, *name_b; |
3713 | name_a = p->one->mode ? p->one->path : p->two->path; | |
3714 | name_b = NULL; | |
3715 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 | 3716 | write_name_quoted(name_a, opt->file, line_termination); |
663af342 | 3717 | } |
6973dcae JH |
3718 | } |
3719 | ||
3720 | int diff_unmodified_pair(struct diff_filepair *p) | |
3721 | { | |
3722 | /* This function is written stricter than necessary to support | |
3723 | * the currently implemented transformers, but the idea is to | |
3724 | * let transformers to produce diff_filepairs any way they want, | |
3725 | * and filter and clean them up here before producing the output. | |
3726 | */ | |
663af342 | 3727 | struct diff_filespec *one = p->one, *two = p->two; |
6973dcae JH |
3728 | |
3729 | if (DIFF_PAIR_UNMERGED(p)) | |
3730 | return 0; /* unmerged is interesting */ | |
3731 | ||
6973dcae JH |
3732 | /* deletion, addition, mode or type change |
3733 | * and rename are all interesting. | |
3734 | */ | |
3735 | if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || | |
3736 | DIFF_PAIR_MODE_CHANGED(p) || | |
3737 | strcmp(one->path, two->path)) | |
3738 | return 0; | |
3739 | ||
3740 | /* both are valid and point at the same path. that is, we are | |
3741 | * dealing with a change. | |
3742 | */ | |
3743 | if (one->sha1_valid && two->sha1_valid && | |
85adbf2f JL |
3744 | !hashcmp(one->sha1, two->sha1) && |
3745 | !one->dirty_submodule && !two->dirty_submodule) | |
6973dcae JH |
3746 | return 1; /* no change */ |
3747 | if (!one->sha1_valid && !two->sha1_valid) | |
3748 | return 1; /* both look at the same file on the filesystem. */ | |
3749 | return 0; | |
3750 | } | |
3751 | ||
3752 | static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) | |
3753 | { | |
3754 | if (diff_unmodified_pair(p)) | |
3755 | return; | |
3756 | ||
3757 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3758 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
3759 | return; /* no tree diffs in patch format */ | |
3760 | ||
3761 | run_diff(p, o); | |
3762 | } | |
3763 | ||
3764 | static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, | |
3765 | struct diffstat_t *diffstat) | |
3766 | { | |
3767 | if (diff_unmodified_pair(p)) | |
3768 | return; | |
3769 | ||
3770 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3771 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
c3fced64 | 3772 | return; /* no useful stat for tree diffs */ |
6973dcae JH |
3773 | |
3774 | run_diffstat(p, o, diffstat); | |
3775 | } | |
3776 | ||
88246898 JS |
3777 | static void diff_flush_checkdiff(struct diff_filepair *p, |
3778 | struct diff_options *o) | |
3779 | { | |
3780 | if (diff_unmodified_pair(p)) | |
3781 | return; | |
3782 | ||
3783 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3784 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
c3fced64 | 3785 | return; /* nothing to check in tree diffs */ |
88246898 JS |
3786 | |
3787 | run_checkdiff(p, o); | |
3788 | } | |
3789 | ||
6973dcae JH |
3790 | int diff_queue_is_empty(void) |
3791 | { | |
3792 | struct diff_queue_struct *q = &diff_queued_diff; | |
3793 | int i; | |
3794 | for (i = 0; i < q->nr; i++) | |
3795 | if (!diff_unmodified_pair(q->queue[i])) | |
3796 | return 0; | |
3797 | return 1; | |
3798 | } | |
3799 | ||
3800 | #if DIFF_DEBUG | |
3801 | void diff_debug_filespec(struct diff_filespec *s, int x, const char *one) | |
3802 | { | |
3803 | fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n", | |
3804 | x, one ? one : "", | |
3805 | s->path, | |
3806 | DIFF_FILE_VALID(s) ? "valid" : "invalid", | |
3807 | s->mode, | |
3808 | s->sha1_valid ? sha1_to_hex(s->sha1) : ""); | |
3809 | fprintf(stderr, "queue[%d] %s size %lu flags %d\n", | |
3810 | x, one ? one : "", | |
3811 | s->size, s->xfrm_flags); | |
3812 | } | |
3813 | ||
3814 | void diff_debug_filepair(const struct diff_filepair *p, int i) | |
3815 | { | |
3816 | diff_debug_filespec(p->one, i, "one"); | |
3817 | diff_debug_filespec(p->two, i, "two"); | |
64479711 | 3818 | fprintf(stderr, "score %d, status %c rename_used %d broken %d\n", |
6973dcae | 3819 | p->score, p->status ? p->status : '?', |
64479711 | 3820 | p->one->rename_used, p->broken_pair); |
6973dcae JH |
3821 | } |
3822 | ||
3823 | void diff_debug_queue(const char *msg, struct diff_queue_struct *q) | |
3824 | { | |
3825 | int i; | |
3826 | if (msg) | |
3827 | fprintf(stderr, "%s\n", msg); | |
3828 | fprintf(stderr, "q->nr = %d\n", q->nr); | |
3829 | for (i = 0; i < q->nr; i++) { | |
3830 | struct diff_filepair *p = q->queue[i]; | |
3831 | diff_debug_filepair(p, i); | |
3832 | } | |
3833 | } | |
3834 | #endif | |
3835 | ||
3836 | static void diff_resolve_rename_copy(void) | |
3837 | { | |
64479711 LT |
3838 | int i; |
3839 | struct diff_filepair *p; | |
6973dcae JH |
3840 | struct diff_queue_struct *q = &diff_queued_diff; |
3841 | ||
3842 | diff_debug_queue("resolve-rename-copy", q); | |
3843 | ||
3844 | for (i = 0; i < q->nr; i++) { | |
3845 | p = q->queue[i]; | |
3846 | p->status = 0; /* undecided */ | |
3847 | if (DIFF_PAIR_UNMERGED(p)) | |
3848 | p->status = DIFF_STATUS_UNMERGED; | |
3849 | else if (!DIFF_FILE_VALID(p->one)) | |
3850 | p->status = DIFF_STATUS_ADDED; | |
3851 | else if (!DIFF_FILE_VALID(p->two)) | |
3852 | p->status = DIFF_STATUS_DELETED; | |
3853 | else if (DIFF_PAIR_TYPE_CHANGED(p)) | |
3854 | p->status = DIFF_STATUS_TYPE_CHANGED; | |
3855 | ||
3856 | /* from this point on, we are dealing with a pair | |
3857 | * whose both sides are valid and of the same type, i.e. | |
3858 | * either in-place edit or rename/copy edit. | |
3859 | */ | |
3860 | else if (DIFF_PAIR_RENAME(p)) { | |
64479711 LT |
3861 | /* |
3862 | * A rename might have re-connected a broken | |
3863 | * pair up, causing the pathnames to be the | |
3864 | * same again. If so, that's not a rename at | |
3865 | * all, just a modification.. | |
3866 | * | |
3867 | * Otherwise, see if this source was used for | |
3868 | * multiple renames, in which case we decrement | |
3869 | * the count, and call it a copy. | |
6973dcae | 3870 | */ |
64479711 LT |
3871 | if (!strcmp(p->one->path, p->two->path)) |
3872 | p->status = DIFF_STATUS_MODIFIED; | |
3873 | else if (--p->one->rename_used > 0) | |
6973dcae | 3874 | p->status = DIFF_STATUS_COPIED; |
64479711 | 3875 | else |
6973dcae JH |
3876 | p->status = DIFF_STATUS_RENAMED; |
3877 | } | |
a89fccd2 | 3878 | else if (hashcmp(p->one->sha1, p->two->sha1) || |
d516c2d1 | 3879 | p->one->mode != p->two->mode || |
85adbf2f JL |
3880 | p->one->dirty_submodule || |
3881 | p->two->dirty_submodule || | |
d516c2d1 | 3882 | is_null_sha1(p->one->sha1)) |
6973dcae JH |
3883 | p->status = DIFF_STATUS_MODIFIED; |
3884 | else { | |
3885 | /* This is a "no-change" entry and should not | |
3886 | * happen anymore, but prepare for broken callers. | |
3887 | */ | |
3888 | error("feeding unmodified %s to diffcore", | |
3889 | p->one->path); | |
3890 | p->status = DIFF_STATUS_UNKNOWN; | |
3891 | } | |
3892 | } | |
3893 | diff_debug_queue("resolve-rename-copy done", q); | |
3894 | } | |
3895 | ||
c6744349 | 3896 | static int check_pair_status(struct diff_filepair *p) |
6973dcae | 3897 | { |
6973dcae JH |
3898 | switch (p->status) { |
3899 | case DIFF_STATUS_UNKNOWN: | |
c6744349 | 3900 | return 0; |
6973dcae JH |
3901 | case 0: |
3902 | die("internal error in diff-resolve-rename-copy"); | |
6973dcae | 3903 | default: |
c6744349 | 3904 | return 1; |
6973dcae JH |
3905 | } |
3906 | } | |
3907 | ||
c6744349 TH |
3908 | static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt) |
3909 | { | |
3910 | int fmt = opt->output_format; | |
3911 | ||
3912 | if (fmt & DIFF_FORMAT_CHECKDIFF) | |
3913 | diff_flush_checkdiff(p, opt); | |
3914 | else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) | |
3915 | diff_flush_raw(p, opt); | |
cd676a51 JH |
3916 | else if (fmt & DIFF_FORMAT_NAME) { |
3917 | const char *name_a, *name_b; | |
3918 | name_a = p->two->path; | |
3919 | name_b = NULL; | |
3920 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 | 3921 | write_name_quoted(name_a, opt->file, opt->line_termination); |
cd676a51 | 3922 | } |
c6744349 TH |
3923 | } |
3924 | ||
c0c77734 | 3925 | static void show_file_mode_name(FILE *file, const char *newdelete, struct diff_filespec *fs) |
4bbd261b SE |
3926 | { |
3927 | if (fs->mode) | |
c0c77734 | 3928 | fprintf(file, " %s mode %06o ", newdelete, fs->mode); |
4bbd261b | 3929 | else |
c0c77734 DB |
3930 | fprintf(file, " %s ", newdelete); |
3931 | write_name_quoted(fs->path, file, '\n'); | |
4bbd261b SE |
3932 | } |
3933 | ||
3934 | ||
7be57610 BY |
3935 | static void show_mode_change(FILE *file, struct diff_filepair *p, int show_name, |
3936 | const char *line_prefix) | |
4bbd261b SE |
3937 | { |
3938 | if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) { | |
7be57610 BY |
3939 | fprintf(file, "%s mode change %06o => %06o%c", line_prefix, p->one->mode, |
3940 | p->two->mode, show_name ? ' ' : '\n'); | |
0d26a64e | 3941 | if (show_name) { |
c0c77734 | 3942 | write_name_quoted(p->two->path, file, '\n'); |
0d26a64e | 3943 | } |
4bbd261b SE |
3944 | } |
3945 | } | |
3946 | ||
7be57610 BY |
3947 | static void show_rename_copy(FILE *file, const char *renamecopy, struct diff_filepair *p, |
3948 | const char *line_prefix) | |
4bbd261b | 3949 | { |
b9f44164 | 3950 | char *names = pprint_rename(p->one->path, p->two->path); |
4bbd261b | 3951 | |
c0c77734 | 3952 | fprintf(file, " %s %s (%d%%)\n", renamecopy, names, similarity_index(p)); |
b9f44164 | 3953 | free(names); |
7be57610 | 3954 | show_mode_change(file, p, 0, line_prefix); |
4bbd261b SE |
3955 | } |
3956 | ||
7be57610 | 3957 | static void diff_summary(struct diff_options *opt, struct diff_filepair *p) |
4bbd261b | 3958 | { |
7be57610 BY |
3959 | FILE *file = opt->file; |
3960 | char *line_prefix = ""; | |
3961 | ||
3962 | if (opt->output_prefix) { | |
3963 | struct strbuf *buf = opt->output_prefix(opt, opt->output_prefix_data); | |
3964 | line_prefix = buf->buf; | |
3965 | } | |
3966 | ||
4bbd261b SE |
3967 | switch(p->status) { |
3968 | case DIFF_STATUS_DELETED: | |
7be57610 | 3969 | fputs(line_prefix, file); |
c0c77734 | 3970 | show_file_mode_name(file, "delete", p->one); |
4bbd261b SE |
3971 | break; |
3972 | case DIFF_STATUS_ADDED: | |
7be57610 | 3973 | fputs(line_prefix, file); |
c0c77734 | 3974 | show_file_mode_name(file, "create", p->two); |
4bbd261b SE |
3975 | break; |
3976 | case DIFF_STATUS_COPIED: | |
7be57610 BY |
3977 | fputs(line_prefix, file); |
3978 | show_rename_copy(file, "copy", p, line_prefix); | |
4bbd261b SE |
3979 | break; |
3980 | case DIFF_STATUS_RENAMED: | |
7be57610 BY |
3981 | fputs(line_prefix, file); |
3982 | show_rename_copy(file, "rename", p, line_prefix); | |
4bbd261b SE |
3983 | break; |
3984 | default: | |
3985 | if (p->score) { | |
7be57610 | 3986 | fprintf(file, "%s rewrite ", line_prefix); |
c0c77734 DB |
3987 | write_name_quoted(p->two->path, file, ' '); |
3988 | fprintf(file, "(%d%%)\n", similarity_index(p)); | |
663af342 | 3989 | } |
7be57610 | 3990 | show_mode_change(file, p, !p->score, line_prefix); |
4bbd261b SE |
3991 | break; |
3992 | } | |
3993 | } | |
3994 | ||
fcb3d0ad | 3995 | struct patch_id_t { |
9126f009 | 3996 | git_SHA_CTX *ctx; |
fcb3d0ad JS |
3997 | int patchlen; |
3998 | }; | |
3999 | ||
4000 | static int remove_space(char *line, int len) | |
4001 | { | |
4002 | int i; | |
663af342 PH |
4003 | char *dst = line; |
4004 | unsigned char c; | |
fcb3d0ad | 4005 | |
663af342 PH |
4006 | for (i = 0; i < len; i++) |
4007 | if (!isspace((c = line[i]))) | |
4008 | *dst++ = c; | |
fcb3d0ad | 4009 | |
663af342 | 4010 | return dst - line; |
fcb3d0ad JS |
4011 | } |
4012 | ||
4013 | static void patch_id_consume(void *priv, char *line, unsigned long len) | |
4014 | { | |
4015 | struct patch_id_t *data = priv; | |
4016 | int new_len; | |
4017 | ||
4018 | /* Ignore line numbers when computing the SHA1 of the patch */ | |
cc44c765 | 4019 | if (!prefixcmp(line, "@@ -")) |
fcb3d0ad JS |
4020 | return; |
4021 | ||
4022 | new_len = remove_space(line, len); | |
4023 | ||
9126f009 | 4024 | git_SHA1_Update(data->ctx, line, new_len); |
fcb3d0ad JS |
4025 | data->patchlen += new_len; |
4026 | } | |
4027 | ||
4028 | /* returns 0 upon success, and writes result into sha1 */ | |
4029 | static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) | |
4030 | { | |
4031 | struct diff_queue_struct *q = &diff_queued_diff; | |
4032 | int i; | |
9126f009 | 4033 | git_SHA_CTX ctx; |
fcb3d0ad JS |
4034 | struct patch_id_t data; |
4035 | char buffer[PATH_MAX * 4 + 20]; | |
4036 | ||
9126f009 | 4037 | git_SHA1_Init(&ctx); |
fcb3d0ad JS |
4038 | memset(&data, 0, sizeof(struct patch_id_t)); |
4039 | data.ctx = &ctx; | |
fcb3d0ad JS |
4040 | |
4041 | for (i = 0; i < q->nr; i++) { | |
4042 | xpparam_t xpp; | |
4043 | xdemitconf_t xecfg; | |
fcb3d0ad JS |
4044 | mmfile_t mf1, mf2; |
4045 | struct diff_filepair *p = q->queue[i]; | |
4046 | int len1, len2; | |
4047 | ||
9ccd0a88 | 4048 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 4049 | memset(&xecfg, 0, sizeof(xecfg)); |
fcb3d0ad JS |
4050 | if (p->status == 0) |
4051 | return error("internal diff status error"); | |
4052 | if (p->status == DIFF_STATUS_UNKNOWN) | |
4053 | continue; | |
4054 | if (diff_unmodified_pair(p)) | |
4055 | continue; | |
4056 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4057 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
4058 | continue; | |
4059 | if (DIFF_PAIR_UNMERGED(p)) | |
4060 | continue; | |
4061 | ||
4062 | diff_fill_sha1_info(p->one); | |
4063 | diff_fill_sha1_info(p->two); | |
4064 | if (fill_mmfile(&mf1, p->one) < 0 || | |
4065 | fill_mmfile(&mf2, p->two) < 0) | |
4066 | return error("unable to read files to diff"); | |
4067 | ||
fcb3d0ad JS |
4068 | len1 = remove_space(p->one->path, strlen(p->one->path)); |
4069 | len2 = remove_space(p->two->path, strlen(p->two->path)); | |
4070 | if (p->one->mode == 0) | |
4071 | len1 = snprintf(buffer, sizeof(buffer), | |
4072 | "diff--gita/%.*sb/%.*s" | |
4073 | "newfilemode%06o" | |
4074 | "---/dev/null" | |
4075 | "+++b/%.*s", | |
4076 | len1, p->one->path, | |
4077 | len2, p->two->path, | |
4078 | p->two->mode, | |
4079 | len2, p->two->path); | |
4080 | else if (p->two->mode == 0) | |
4081 | len1 = snprintf(buffer, sizeof(buffer), | |
4082 | "diff--gita/%.*sb/%.*s" | |
4083 | "deletedfilemode%06o" | |
4084 | "---a/%.*s" | |
4085 | "+++/dev/null", | |
4086 | len1, p->one->path, | |
4087 | len2, p->two->path, | |
4088 | p->one->mode, | |
4089 | len1, p->one->path); | |
4090 | else | |
4091 | len1 = snprintf(buffer, sizeof(buffer), | |
4092 | "diff--gita/%.*sb/%.*s" | |
4093 | "---a/%.*s" | |
4094 | "+++b/%.*s", | |
4095 | len1, p->one->path, | |
4096 | len2, p->two->path, | |
4097 | len1, p->one->path, | |
4098 | len2, p->two->path); | |
9126f009 | 4099 | git_SHA1_Update(&ctx, buffer, len1); |
fcb3d0ad | 4100 | |
34597c1f CB |
4101 | if (diff_filespec_is_binary(p->one) || |
4102 | diff_filespec_is_binary(p->two)) { | |
4103 | git_SHA1_Update(&ctx, sha1_to_hex(p->one->sha1), 40); | |
4104 | git_SHA1_Update(&ctx, sha1_to_hex(p->two->sha1), 40); | |
4105 | continue; | |
4106 | } | |
4107 | ||
582aa00b | 4108 | xpp.flags = 0; |
fcb3d0ad | 4109 | xecfg.ctxlen = 3; |
ad14b450 | 4110 | xecfg.flags = 0; |
8a3f524b | 4111 | xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data, |
dfea7900 | 4112 | &xpp, &xecfg); |
fcb3d0ad JS |
4113 | } |
4114 | ||
9126f009 | 4115 | git_SHA1_Final(sha1, &ctx); |
fcb3d0ad JS |
4116 | return 0; |
4117 | } | |
4118 | ||
4119 | int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1) | |
4120 | { | |
4121 | struct diff_queue_struct *q = &diff_queued_diff; | |
4122 | int i; | |
4123 | int result = diff_get_patch_id(options, sha1); | |
4124 | ||
4125 | for (i = 0; i < q->nr; i++) | |
4126 | diff_free_filepair(q->queue[i]); | |
4127 | ||
4128 | free(q->queue); | |
9ca5df90 | 4129 | DIFF_QUEUE_CLEAR(q); |
fcb3d0ad JS |
4130 | |
4131 | return result; | |
4132 | } | |
4133 | ||
946c3784 | 4134 | static int is_summary_empty(const struct diff_queue_struct *q) |
6973dcae | 4135 | { |
6973dcae | 4136 | int i; |
6973dcae | 4137 | |
946c3784 TH |
4138 | for (i = 0; i < q->nr; i++) { |
4139 | const struct diff_filepair *p = q->queue[i]; | |
4140 | ||
4141 | switch (p->status) { | |
4142 | case DIFF_STATUS_DELETED: | |
4143 | case DIFF_STATUS_ADDED: | |
4144 | case DIFF_STATUS_COPIED: | |
4145 | case DIFF_STATUS_RENAMED: | |
4146 | return 0; | |
4147 | default: | |
4148 | if (p->score) | |
4149 | return 0; | |
4150 | if (p->one->mode && p->two->mode && | |
4151 | p->one->mode != p->two->mode) | |
4152 | return 0; | |
4153 | break; | |
4154 | } | |
6973dcae | 4155 | } |
946c3784 TH |
4156 | return 1; |
4157 | } | |
4158 | ||
f31027c9 JH |
4159 | static const char rename_limit_warning[] = |
4160 | "inexact rename detection was skipped due to too many files."; | |
4161 | ||
4162 | static const char degrade_cc_to_c_warning[] = | |
4163 | "only found copies from modified paths due to too many files."; | |
4164 | ||
4165 | static const char rename_limit_advice[] = | |
4166 | "you may want to set your %s variable to at least " | |
4167 | "%d and retry the command."; | |
4168 | ||
4169 | void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc) | |
4170 | { | |
4171 | if (degraded_cc) | |
4172 | warning(degrade_cc_to_c_warning); | |
4173 | else if (needed) | |
4174 | warning(rename_limit_warning); | |
4175 | else | |
4176 | return; | |
4177 | if (0 < needed && needed < 32767) | |
4178 | warning(rename_limit_advice, varname, needed); | |
4179 | } | |
4180 | ||
6973dcae JH |
4181 | void diff_flush(struct diff_options *options) |
4182 | { | |
4183 | struct diff_queue_struct *q = &diff_queued_diff; | |
c6744349 | 4184 | int i, output_format = options->output_format; |
946c3784 | 4185 | int separator = 0; |
1c57a627 | 4186 | int dirstat_by_line = 0; |
6973dcae | 4187 | |
c6744349 TH |
4188 | /* |
4189 | * Order: raw, stat, summary, patch | |
4190 | * or: name/name-status/checkdiff (other bits clear) | |
4191 | */ | |
946c3784 TH |
4192 | if (!q->nr) |
4193 | goto free_queue; | |
6973dcae | 4194 | |
c6744349 TH |
4195 | if (output_format & (DIFF_FORMAT_RAW | |
4196 | DIFF_FORMAT_NAME | | |
4197 | DIFF_FORMAT_NAME_STATUS | | |
4198 | DIFF_FORMAT_CHECKDIFF)) { | |
6973dcae JH |
4199 | for (i = 0; i < q->nr; i++) { |
4200 | struct diff_filepair *p = q->queue[i]; | |
c6744349 TH |
4201 | if (check_pair_status(p)) |
4202 | flush_one_pair(p, options); | |
6973dcae | 4203 | } |
946c3784 | 4204 | separator++; |
6973dcae | 4205 | } |
c6744349 | 4206 | |
1c57a627 JH |
4207 | if (output_format & DIFF_FORMAT_DIRSTAT && DIFF_OPT_TST(options, DIRSTAT_BY_LINE)) |
4208 | dirstat_by_line = 1; | |
4209 | ||
4210 | if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT) || | |
4211 | dirstat_by_line) { | |
5e2b0636 | 4212 | struct diffstat_t diffstat; |
c6744349 | 4213 | |
5e2b0636 | 4214 | memset(&diffstat, 0, sizeof(struct diffstat_t)); |
6973dcae JH |
4215 | for (i = 0; i < q->nr; i++) { |
4216 | struct diff_filepair *p = q->queue[i]; | |
c6744349 | 4217 | if (check_pair_status(p)) |
5e2b0636 | 4218 | diff_flush_stat(p, options, &diffstat); |
6973dcae | 4219 | } |
74e2abe5 JH |
4220 | if (output_format & DIFF_FORMAT_NUMSTAT) |
4221 | show_numstat(&diffstat, options); | |
4222 | if (output_format & DIFF_FORMAT_DIFFSTAT) | |
4223 | show_stats(&diffstat, options); | |
f604652e | 4224 | if (output_format & DIFF_FORMAT_SHORTSTAT) |
c0c77734 | 4225 | show_shortstats(&diffstat, options); |
1c57a627 JH |
4226 | if (output_format & DIFF_FORMAT_DIRSTAT) |
4227 | show_dirstat_by_line(&diffstat, options); | |
f604652e | 4228 | free_diffstat_info(&diffstat); |
3969cf7d | 4229 | separator++; |
6973dcae | 4230 | } |
1c57a627 | 4231 | if ((output_format & DIFF_FORMAT_DIRSTAT) && !dirstat_by_line) |
c04a7155 | 4232 | show_dirstat(options); |
6973dcae | 4233 | |
946c3784 | 4234 | if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { |
7be57610 BY |
4235 | for (i = 0; i < q->nr; i++) { |
4236 | diff_summary(options, q->queue[i]); | |
4237 | } | |
3969cf7d | 4238 | separator++; |
6973dcae JH |
4239 | } |
4240 | ||
6977c250 LA |
4241 | if (output_format & DIFF_FORMAT_NO_OUTPUT && |
4242 | DIFF_OPT_TST(options, EXIT_WITH_STATUS) && | |
4243 | DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { | |
4244 | /* | |
4245 | * run diff_flush_patch for the exit status. setting | |
4246 | * options->file to /dev/null should be safe, becaue we | |
4247 | * aren't supposed to produce any output anyway. | |
4248 | */ | |
4249 | if (options->close_file) | |
4250 | fclose(options->file); | |
4251 | options->file = fopen("/dev/null", "w"); | |
4252 | if (!options->file) | |
4253 | die_errno("Could not open /dev/null"); | |
4254 | options->close_file = 1; | |
4255 | for (i = 0; i < q->nr; i++) { | |
4256 | struct diff_filepair *p = q->queue[i]; | |
4257 | if (check_pair_status(p)) | |
4258 | diff_flush_patch(p, options); | |
4259 | if (options->found_changes) | |
4260 | break; | |
4261 | } | |
4262 | } | |
4263 | ||
c6744349 | 4264 | if (output_format & DIFF_FORMAT_PATCH) { |
946c3784 | 4265 | if (separator) { |
6b2fbaaf | 4266 | putc(options->line_termination, options->file); |
946c3784 TH |
4267 | if (options->stat_sep) { |
4268 | /* attach patch instead of inline */ | |
c0c77734 | 4269 | fputs(options->stat_sep, options->file); |
946c3784 | 4270 | } |
c6744349 TH |
4271 | } |
4272 | ||
4273 | for (i = 0; i < q->nr; i++) { | |
4274 | struct diff_filepair *p = q->queue[i]; | |
4275 | if (check_pair_status(p)) | |
4276 | diff_flush_patch(p, options); | |
4277 | } | |
4bbd261b SE |
4278 | } |
4279 | ||
04245581 JK |
4280 | if (output_format & DIFF_FORMAT_CALLBACK) |
4281 | options->format_callback(q, options, options->format_callback_data); | |
4282 | ||
c6744349 TH |
4283 | for (i = 0; i < q->nr; i++) |
4284 | diff_free_filepair(q->queue[i]); | |
946c3784 | 4285 | free_queue: |
6973dcae | 4286 | free(q->queue); |
9ca5df90 | 4287 | DIFF_QUEUE_CLEAR(q); |
c0c77734 DB |
4288 | if (options->close_file) |
4289 | fclose(options->file); | |
f245194f JH |
4290 | |
4291 | /* | |
97bf2a08 | 4292 | * Report the content-level differences with HAS_CHANGES; |
f245194f JH |
4293 | * diff_addremove/diff_change does not set the bit when |
4294 | * DIFF_FROM_CONTENTS is in effect (e.g. with -w). | |
4295 | */ | |
4296 | if (DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { | |
4297 | if (options->found_changes) | |
4298 | DIFF_OPT_SET(options, HAS_CHANGES); | |
4299 | else | |
4300 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
4301 | } | |
6973dcae JH |
4302 | } |
4303 | ||
4304 | static void diffcore_apply_filter(const char *filter) | |
4305 | { | |
4306 | int i; | |
4307 | struct diff_queue_struct *q = &diff_queued_diff; | |
4308 | struct diff_queue_struct outq; | |
9ca5df90 | 4309 | DIFF_QUEUE_CLEAR(&outq); |
6973dcae JH |
4310 | |
4311 | if (!filter) | |
4312 | return; | |
4313 | ||
4314 | if (strchr(filter, DIFF_STATUS_FILTER_AON)) { | |
4315 | int found; | |
4316 | for (i = found = 0; !found && i < q->nr; i++) { | |
4317 | struct diff_filepair *p = q->queue[i]; | |
4318 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
4319 | ((p->score && | |
4320 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
4321 | (!p->score && | |
4322 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
4323 | ((p->status != DIFF_STATUS_MODIFIED) && | |
4324 | strchr(filter, p->status))) | |
4325 | found++; | |
4326 | } | |
4327 | if (found) | |
4328 | return; | |
4329 | ||
4330 | /* otherwise we will clear the whole queue | |
4331 | * by copying the empty outq at the end of this | |
4332 | * function, but first clear the current entries | |
4333 | * in the queue. | |
4334 | */ | |
4335 | for (i = 0; i < q->nr; i++) | |
4336 | diff_free_filepair(q->queue[i]); | |
4337 | } | |
4338 | else { | |
4339 | /* Only the matching ones */ | |
4340 | for (i = 0; i < q->nr; i++) { | |
4341 | struct diff_filepair *p = q->queue[i]; | |
4342 | ||
4343 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
4344 | ((p->score && | |
4345 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
4346 | (!p->score && | |
4347 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
4348 | ((p->status != DIFF_STATUS_MODIFIED) && | |
4349 | strchr(filter, p->status))) | |
4350 | diff_q(&outq, p); | |
4351 | else | |
4352 | diff_free_filepair(p); | |
4353 | } | |
4354 | } | |
4355 | free(q->queue); | |
4356 | *q = outq; | |
4357 | } | |
4358 | ||
5701115a SV |
4359 | /* Check whether two filespecs with the same mode and size are identical */ |
4360 | static int diff_filespec_is_identical(struct diff_filespec *one, | |
4361 | struct diff_filespec *two) | |
4362 | { | |
2b459b48 JH |
4363 | if (S_ISGITLINK(one->mode)) |
4364 | return 0; | |
5701115a SV |
4365 | if (diff_populate_filespec(one, 0)) |
4366 | return 0; | |
4367 | if (diff_populate_filespec(two, 0)) | |
4368 | return 0; | |
4369 | return !memcmp(one->data, two->data, one->size); | |
4370 | } | |
4371 | ||
fb13227e JH |
4372 | static void diffcore_skip_stat_unmatch(struct diff_options *diffopt) |
4373 | { | |
4374 | int i; | |
4375 | struct diff_queue_struct *q = &diff_queued_diff; | |
4376 | struct diff_queue_struct outq; | |
9ca5df90 | 4377 | DIFF_QUEUE_CLEAR(&outq); |
fb13227e JH |
4378 | |
4379 | for (i = 0; i < q->nr; i++) { | |
4380 | struct diff_filepair *p = q->queue[i]; | |
4381 | ||
4382 | /* | |
9517e6b8 | 4383 | * 1. Entries that come from stat info dirtiness |
fb13227e JH |
4384 | * always have both sides (iow, not create/delete), |
4385 | * one side of the object name is unknown, with | |
4386 | * the same mode and size. Keep the ones that | |
4387 | * do not match these criteria. They have real | |
4388 | * differences. | |
4389 | * | |
4390 | * 2. At this point, the file is known to be modified, | |
4391 | * with the same mode and size, and the object | |
4392 | * name of one side is unknown. Need to inspect | |
4393 | * the identical contents. | |
4394 | */ | |
4395 | if (!DIFF_FILE_VALID(p->one) || /* (1) */ | |
4396 | !DIFF_FILE_VALID(p->two) || | |
4397 | (p->one->sha1_valid && p->two->sha1_valid) || | |
4398 | (p->one->mode != p->two->mode) || | |
4399 | diff_populate_filespec(p->one, 1) || | |
4400 | diff_populate_filespec(p->two, 1) || | |
4401 | (p->one->size != p->two->size) || | |
5701115a | 4402 | !diff_filespec_is_identical(p->one, p->two)) /* (2) */ |
fb13227e JH |
4403 | diff_q(&outq, p); |
4404 | else { | |
4405 | /* | |
4406 | * The caller can subtract 1 from skip_stat_unmatch | |
4407 | * to determine how many paths were dirty only | |
4408 | * due to stat info mismatch. | |
4409 | */ | |
8f67f8ae | 4410 | if (!DIFF_OPT_TST(diffopt, NO_INDEX)) |
6d2d9e86 | 4411 | diffopt->skip_stat_unmatch++; |
fb13227e JH |
4412 | diff_free_filepair(p); |
4413 | } | |
4414 | } | |
4415 | free(q->queue); | |
4416 | *q = outq; | |
4417 | } | |
4418 | ||
730f7284 JH |
4419 | static int diffnamecmp(const void *a_, const void *b_) |
4420 | { | |
4421 | const struct diff_filepair *a = *((const struct diff_filepair **)a_); | |
4422 | const struct diff_filepair *b = *((const struct diff_filepair **)b_); | |
4423 | const char *name_a, *name_b; | |
4424 | ||
4425 | name_a = a->one ? a->one->path : a->two->path; | |
4426 | name_b = b->one ? b->one->path : b->two->path; | |
4427 | return strcmp(name_a, name_b); | |
4428 | } | |
4429 | ||
4430 | void diffcore_fix_diff_index(struct diff_options *options) | |
4431 | { | |
4432 | struct diff_queue_struct *q = &diff_queued_diff; | |
4433 | qsort(q->queue, q->nr, sizeof(q->queue[0]), diffnamecmp); | |
4434 | } | |
4435 | ||
6973dcae JH |
4436 | void diffcore_std(struct diff_options *options) |
4437 | { | |
9d865356 | 4438 | if (options->skip_stat_unmatch) |
fb13227e | 4439 | diffcore_skip_stat_unmatch(options); |
44c48a90 JH |
4440 | if (!options->found_follow) { |
4441 | /* See try_to_follow_renames() in tree-diff.c */ | |
4442 | if (options->break_opt != -1) | |
4443 | diffcore_break(options->break_opt); | |
4444 | if (options->detect_rename) | |
4445 | diffcore_rename(options); | |
4446 | if (options->break_opt != -1) | |
4447 | diffcore_merge_broken(); | |
4448 | } | |
6973dcae | 4449 | if (options->pickaxe) |
382f013b | 4450 | diffcore_pickaxe(options); |
6973dcae JH |
4451 | if (options->orderfile) |
4452 | diffcore_order(options->orderfile); | |
44c48a90 JH |
4453 | if (!options->found_follow) |
4454 | /* See try_to_follow_renames() in tree-diff.c */ | |
4455 | diff_resolve_rename_copy(); | |
6973dcae | 4456 | diffcore_apply_filter(options->filter); |
68aacb2f | 4457 | |
f245194f | 4458 | if (diff_queued_diff.nr && !DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
8f67f8ae PH |
4459 | DIFF_OPT_SET(options, HAS_CHANGES); |
4460 | else | |
4461 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
1da6175d | 4462 | |
44c48a90 | 4463 | options->found_follow = 0; |
6973dcae JH |
4464 | } |
4465 | ||
da31b358 JH |
4466 | int diff_result_code(struct diff_options *opt, int status) |
4467 | { | |
4468 | int result = 0; | |
f31027c9 JH |
4469 | |
4470 | diff_warn_rename_limit("diff.renamelimit", | |
4471 | opt->needed_rename_limit, | |
4472 | opt->degraded_cc_to_c); | |
da31b358 JH |
4473 | if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && |
4474 | !(opt->output_format & DIFF_FORMAT_CHECKDIFF)) | |
4475 | return status; | |
4476 | if (DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
4477 | DIFF_OPT_TST(opt, HAS_CHANGES)) | |
4478 | result |= 01; | |
4479 | if ((opt->output_format & DIFF_FORMAT_CHECKDIFF) && | |
4480 | DIFF_OPT_TST(opt, CHECK_FAILED)) | |
4481 | result |= 02; | |
4482 | return result; | |
4483 | } | |
6973dcae | 4484 | |
28b9264d JH |
4485 | int diff_can_quit_early(struct diff_options *opt) |
4486 | { | |
4487 | return (DIFF_OPT_TST(opt, QUICK) && | |
4488 | !opt->filter && | |
4489 | DIFF_OPT_TST(opt, HAS_CHANGES)); | |
4490 | } | |
4491 | ||
aee9c7d6 JL |
4492 | /* |
4493 | * Shall changes to this submodule be ignored? | |
4494 | * | |
4495 | * Submodule changes can be configured to be ignored separately for each path, | |
4496 | * but that configuration can be overridden from the command line. | |
4497 | */ | |
4498 | static int is_submodule_ignored(const char *path, struct diff_options *options) | |
4499 | { | |
4500 | int ignored = 0; | |
4501 | unsigned orig_flags = options->flags; | |
4502 | if (!DIFF_OPT_TST(options, OVERRIDE_SUBMODULE_CONFIG)) | |
4503 | set_diffopt_flags_from_submodule_config(options, path); | |
4504 | if (DIFF_OPT_TST(options, IGNORE_SUBMODULES)) | |
4505 | ignored = 1; | |
4506 | options->flags = orig_flags; | |
4507 | return ignored; | |
4508 | } | |
4509 | ||
6973dcae JH |
4510 | void diff_addremove(struct diff_options *options, |
4511 | int addremove, unsigned mode, | |
4512 | const unsigned char *sha1, | |
e3d42c47 | 4513 | const char *concatpath, unsigned dirty_submodule) |
6973dcae | 4514 | { |
6973dcae JH |
4515 | struct diff_filespec *one, *two; |
4516 | ||
aee9c7d6 | 4517 | if (S_ISGITLINK(mode) && is_submodule_ignored(concatpath, options)) |
50fd9bd8 JS |
4518 | return; |
4519 | ||
6973dcae JH |
4520 | /* This may look odd, but it is a preparation for |
4521 | * feeding "there are unchanged files which should | |
4522 | * not produce diffs, but when you are doing copy | |
4523 | * detection you would need them, so here they are" | |
4524 | * entries to the diff-core. They will be prefixed | |
4525 | * with something like '=' or '*' (I haven't decided | |
4526 | * which but should not make any difference). | |
a6080a0a | 4527 | * Feeding the same new and old to diff_change() |
6973dcae JH |
4528 | * also has the same effect. |
4529 | * Before the final output happens, they are pruned after | |
4530 | * merged into rename/copy pairs as appropriate. | |
4531 | */ | |
8f67f8ae | 4532 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) |
6973dcae JH |
4533 | addremove = (addremove == '+' ? '-' : |
4534 | addremove == '-' ? '+' : addremove); | |
4535 | ||
cd676a51 JH |
4536 | if (options->prefix && |
4537 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
4538 | return; | |
4539 | ||
6973dcae JH |
4540 | one = alloc_filespec(concatpath); |
4541 | two = alloc_filespec(concatpath); | |
4542 | ||
4543 | if (addremove != '+') | |
4544 | fill_filespec(one, sha1, mode); | |
e3d42c47 | 4545 | if (addremove != '-') { |
6973dcae | 4546 | fill_filespec(two, sha1, mode); |
e3d42c47 JL |
4547 | two->dirty_submodule = dirty_submodule; |
4548 | } | |
6973dcae JH |
4549 | |
4550 | diff_queue(&diff_queued_diff, one, two); | |
f245194f JH |
4551 | if (!DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
4552 | DIFF_OPT_SET(options, HAS_CHANGES); | |
6973dcae JH |
4553 | } |
4554 | ||
4555 | void diff_change(struct diff_options *options, | |
4556 | unsigned old_mode, unsigned new_mode, | |
4557 | const unsigned char *old_sha1, | |
4558 | const unsigned char *new_sha1, | |
e3d42c47 JL |
4559 | const char *concatpath, |
4560 | unsigned old_dirty_submodule, unsigned new_dirty_submodule) | |
6973dcae | 4561 | { |
6973dcae JH |
4562 | struct diff_filespec *one, *two; |
4563 | ||
aee9c7d6 JL |
4564 | if (S_ISGITLINK(old_mode) && S_ISGITLINK(new_mode) && |
4565 | is_submodule_ignored(concatpath, options)) | |
50fd9bd8 JS |
4566 | return; |
4567 | ||
8f67f8ae | 4568 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) { |
6973dcae JH |
4569 | unsigned tmp; |
4570 | const unsigned char *tmp_c; | |
4571 | tmp = old_mode; old_mode = new_mode; new_mode = tmp; | |
4572 | tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c; | |
e3d42c47 JL |
4573 | tmp = old_dirty_submodule; old_dirty_submodule = new_dirty_submodule; |
4574 | new_dirty_submodule = tmp; | |
6973dcae | 4575 | } |
cd676a51 JH |
4576 | |
4577 | if (options->prefix && | |
4578 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
4579 | return; | |
4580 | ||
6973dcae JH |
4581 | one = alloc_filespec(concatpath); |
4582 | two = alloc_filespec(concatpath); | |
4583 | fill_filespec(one, old_sha1, old_mode); | |
4584 | fill_filespec(two, new_sha1, new_mode); | |
e3d42c47 JL |
4585 | one->dirty_submodule = old_dirty_submodule; |
4586 | two->dirty_submodule = new_dirty_submodule; | |
6973dcae JH |
4587 | |
4588 | diff_queue(&diff_queued_diff, one, two); | |
f245194f JH |
4589 | if (!DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
4590 | DIFF_OPT_SET(options, HAS_CHANGES); | |
6973dcae JH |
4591 | } |
4592 | ||
fa7b2908 | 4593 | struct diff_filepair *diff_unmerge(struct diff_options *options, const char *path) |
6973dcae | 4594 | { |
76399c01 | 4595 | struct diff_filepair *pair; |
6973dcae | 4596 | struct diff_filespec *one, *two; |
cd676a51 JH |
4597 | |
4598 | if (options->prefix && | |
4599 | strncmp(path, options->prefix, options->prefix_length)) | |
76399c01 | 4600 | return NULL; |
cd676a51 | 4601 | |
6973dcae JH |
4602 | one = alloc_filespec(path); |
4603 | two = alloc_filespec(path); | |
76399c01 JH |
4604 | pair = diff_queue(&diff_queued_diff, one, two); |
4605 | pair->is_unmerged = 1; | |
4606 | return pair; | |
6973dcae | 4607 | } |
9cb92c39 JK |
4608 | |
4609 | static char *run_textconv(const char *pgm, struct diff_filespec *spec, | |
4610 | size_t *outsize) | |
4611 | { | |
479b0ae8 | 4612 | struct diff_tempfile *temp; |
9cb92c39 JK |
4613 | const char *argv[3]; |
4614 | const char **arg = argv; | |
4615 | struct child_process child; | |
4616 | struct strbuf buf = STRBUF_INIT; | |
da1fbed3 | 4617 | int err = 0; |
9cb92c39 | 4618 | |
479b0ae8 | 4619 | temp = prepare_temp_file(spec->path, spec); |
9cb92c39 | 4620 | *arg++ = pgm; |
479b0ae8 | 4621 | *arg++ = temp->name; |
9cb92c39 JK |
4622 | *arg = NULL; |
4623 | ||
4624 | memset(&child, 0, sizeof(child)); | |
41a457e4 | 4625 | child.use_shell = 1; |
9cb92c39 JK |
4626 | child.argv = argv; |
4627 | child.out = -1; | |
da1fbed3 | 4628 | if (start_command(&child)) { |
479b0ae8 | 4629 | remove_tempfile(); |
9cb92c39 JK |
4630 | return NULL; |
4631 | } | |
da1fbed3 JS |
4632 | |
4633 | if (strbuf_read(&buf, child.out, 0) < 0) | |
4634 | err = error("error reading from textconv command '%s'", pgm); | |
70d70999 | 4635 | close(child.out); |
da1fbed3 JS |
4636 | |
4637 | if (finish_command(&child) || err) { | |
4638 | strbuf_release(&buf); | |
4639 | remove_tempfile(); | |
4640 | return NULL; | |
4641 | } | |
479b0ae8 | 4642 | remove_tempfile(); |
9cb92c39 JK |
4643 | |
4644 | return strbuf_detach(&buf, outsize); | |
4645 | } | |
840383b2 | 4646 | |
a788d7d5 AB |
4647 | size_t fill_textconv(struct userdiff_driver *driver, |
4648 | struct diff_filespec *df, | |
4649 | char **outbuf) | |
840383b2 JK |
4650 | { |
4651 | size_t size; | |
4652 | ||
d9bae1a1 | 4653 | if (!driver || !driver->textconv) { |
840383b2 JK |
4654 | if (!DIFF_FILE_VALID(df)) { |
4655 | *outbuf = ""; | |
4656 | return 0; | |
4657 | } | |
4658 | if (diff_populate_filespec(df, 0)) | |
4659 | die("unable to read files to diff"); | |
4660 | *outbuf = df->data; | |
4661 | return df->size; | |
4662 | } | |
4663 | ||
9ec09b04 | 4664 | if (driver->textconv_cache && df->sha1_valid) { |
d9bae1a1 JK |
4665 | *outbuf = notes_cache_get(driver->textconv_cache, df->sha1, |
4666 | &size); | |
4667 | if (*outbuf) | |
4668 | return size; | |
4669 | } | |
4670 | ||
4671 | *outbuf = run_textconv(driver->textconv, df, &size); | |
840383b2 JK |
4672 | if (!*outbuf) |
4673 | die("unable to read files to diff"); | |
d9bae1a1 | 4674 | |
9ec09b04 | 4675 | if (driver->textconv_cache && df->sha1_valid) { |
d9bae1a1 JK |
4676 | /* ignore errors, as we might be in a readonly repository */ |
4677 | notes_cache_put(driver->textconv_cache, df->sha1, *outbuf, | |
4678 | size); | |
4679 | /* | |
4680 | * we could save up changes and flush them all at the end, | |
4681 | * but we would need an extra call after all diffing is done. | |
4682 | * Since generating a cache entry is the slow path anyway, | |
4683 | * this extra overhead probably isn't a big deal. | |
4684 | */ | |
4685 | notes_cache_write(driver->textconv_cache); | |
4686 | } | |
4687 | ||
840383b2 JK |
4688 | return size; |
4689 | } |