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Commit | Line | Data |
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be3cfa85 JH |
1 | /* |
2 | * Copyright (C) 2005 Junio C Hamano | |
3 | */ | |
86436c28 | 4 | #include "cache.h" |
6fb737be | 5 | #include "quote.h" |
6973dcae | 6 | #include "commit.h" |
86436c28 | 7 | #include "diff.h" |
427dcb4b | 8 | #include "diffcore.h" |
6973dcae | 9 | #include "revision.h" |
1cfe7733 | 10 | #include "cache-tree.h" |
d516c2d1 | 11 | #include "path-list.h" |
427dcb4b | 12 | |
b46f0b6d | 13 | /* |
6973dcae | 14 | * diff-files |
b46f0b6d | 15 | */ |
f0c6b2a2 | 16 | |
d516c2d1 JS |
17 | static int read_directory(const char *path, struct path_list *list) |
18 | { | |
19 | DIR *dir; | |
20 | struct dirent *e; | |
21 | ||
22 | if (!(dir = opendir(path))) | |
23 | return error("Could not open directory %s", path); | |
24 | ||
25 | while ((e = readdir(dir))) | |
26 | if (strcmp(".", e->d_name) && strcmp("..", e->d_name)) | |
4d3f4b80 | 27 | path_list_insert(e->d_name, list); |
d516c2d1 JS |
28 | |
29 | closedir(dir); | |
30 | return 0; | |
31 | } | |
32 | ||
0c725f1b JS |
33 | static int get_mode(const char *path, int *mode) |
34 | { | |
35 | struct stat st; | |
36 | ||
37 | if (!path || !strcmp(path, "/dev/null")) | |
38 | *mode = 0; | |
39 | else if (!strcmp(path, "-")) | |
40 | *mode = ntohl(create_ce_mode(0666)); | |
41 | else if (stat(path, &st)) | |
42 | return error("Could not access '%s'", path); | |
43 | else | |
44 | *mode = st.st_mode; | |
45 | return 0; | |
46 | } | |
47 | ||
d516c2d1 JS |
48 | static int queue_diff(struct diff_options *o, |
49 | const char *name1, const char *name2) | |
50 | { | |
d516c2d1 JS |
51 | int mode1 = 0, mode2 = 0; |
52 | ||
0c725f1b JS |
53 | if (get_mode(name1, &mode1) || get_mode(name2, &mode2)) |
54 | return -1; | |
d516c2d1 JS |
55 | |
56 | if (mode1 && mode2 && S_ISDIR(mode1) != S_ISDIR(mode2)) | |
57 | return error("file/directory conflict: %s, %s", name1, name2); | |
58 | ||
59 | if (S_ISDIR(mode1) || S_ISDIR(mode2)) { | |
60 | char buffer1[PATH_MAX], buffer2[PATH_MAX]; | |
61 | struct path_list p1 = {NULL, 0, 0, 1}, p2 = {NULL, 0, 0, 1}; | |
62 | int len1 = 0, len2 = 0, i1, i2, ret = 0; | |
63 | ||
64 | if (name1 && read_directory(name1, &p1)) | |
65 | return -1; | |
66 | if (name2 && read_directory(name2, &p2)) { | |
67 | path_list_clear(&p1, 0); | |
68 | return -1; | |
69 | } | |
70 | ||
71 | if (name1) { | |
72 | len1 = strlen(name1); | |
73 | if (len1 > 0 && name1[len1 - 1] == '/') | |
74 | len1--; | |
75 | memcpy(buffer1, name1, len1); | |
76 | buffer1[len1++] = '/'; | |
77 | } | |
78 | ||
79 | if (name2) { | |
80 | len2 = strlen(name2); | |
81 | if (len2 > 0 && name2[len2 - 1] == '/') | |
82 | len2--; | |
83 | memcpy(buffer2, name2, len2); | |
84 | buffer2[len2++] = '/'; | |
85 | } | |
86 | ||
87 | for (i1 = i2 = 0; !ret && (i1 < p1.nr || i2 < p2.nr); ) { | |
88 | const char *n1, *n2; | |
89 | int comp; | |
90 | ||
91 | if (i1 == p1.nr) | |
92 | comp = 1; | |
93 | else if (i2 == p2.nr) | |
94 | comp = -1; | |
95 | else | |
96 | comp = strcmp(p1.items[i1].path, | |
97 | p2.items[i2].path); | |
98 | ||
99 | if (comp > 0) | |
100 | n1 = NULL; | |
101 | else { | |
102 | n1 = buffer1; | |
103 | strncpy(buffer1 + len1, p1.items[i1++].path, | |
104 | PATH_MAX - len1); | |
105 | } | |
106 | ||
107 | if (comp < 0) | |
108 | n2 = NULL; | |
109 | else { | |
110 | n2 = buffer2; | |
111 | strncpy(buffer2 + len2, p2.items[i2++].path, | |
112 | PATH_MAX - len2); | |
113 | } | |
114 | ||
115 | ret = queue_diff(o, n1, n2); | |
116 | } | |
117 | path_list_clear(&p1, 0); | |
118 | path_list_clear(&p2, 0); | |
119 | ||
120 | return ret; | |
121 | } else { | |
122 | struct diff_filespec *d1, *d2; | |
123 | ||
124 | if (o->reverse_diff) { | |
125 | unsigned tmp; | |
126 | const char *tmp_c; | |
127 | tmp = mode1; mode1 = mode2; mode2 = tmp; | |
128 | tmp_c = name1; name1 = name2; name2 = tmp_c; | |
129 | } | |
130 | ||
131 | if (!name1) | |
132 | name1 = "/dev/null"; | |
133 | if (!name2) | |
134 | name2 = "/dev/null"; | |
135 | d1 = alloc_filespec(name1); | |
136 | d2 = alloc_filespec(name2); | |
137 | fill_filespec(d1, null_sha1, mode1); | |
138 | fill_filespec(d2, null_sha1, mode2); | |
139 | ||
140 | diff_queue(&diff_queued_diff, d1, d2); | |
141 | return 0; | |
142 | } | |
143 | } | |
144 | ||
1ad029b6 JH |
145 | /* |
146 | * Does the path name a blob in the working tree, or a directory | |
147 | * in the working tree? | |
148 | */ | |
d516c2d1 JS |
149 | static int is_in_index(const char *path) |
150 | { | |
1ad029b6 JH |
151 | int len, pos; |
152 | struct cache_entry *ce; | |
153 | ||
154 | len = strlen(path); | |
155 | while (path[len-1] == '/') | |
156 | len--; | |
157 | if (!len) | |
158 | return 1; /* "." */ | |
159 | pos = cache_name_pos(path, len); | |
160 | if (0 <= pos) | |
161 | return 1; | |
162 | pos = -1 - pos; | |
163 | while (pos < active_nr) { | |
164 | ce = active_cache[pos++]; | |
165 | if (ce_namelen(ce) <= len || | |
166 | strncmp(ce->name, path, len) || | |
167 | (ce->name[len] > '/')) | |
168 | break; /* path cannot be a prefix */ | |
169 | if (ce->name[len] == '/') | |
170 | return 1; | |
171 | } | |
172 | return 0; | |
d516c2d1 JS |
173 | } |
174 | ||
175 | static int handle_diff_files_args(struct rev_info *revs, | |
176 | int argc, const char **argv, int *silent) | |
177 | { | |
178 | *silent = 0; | |
179 | ||
180 | /* revs->max_count == -2 means --no-index */ | |
181 | while (1 < argc && argv[1][0] == '-') { | |
182 | if (!strcmp(argv[1], "--base")) | |
183 | revs->max_count = 1; | |
184 | else if (!strcmp(argv[1], "--ours")) | |
185 | revs->max_count = 2; | |
186 | else if (!strcmp(argv[1], "--theirs")) | |
187 | revs->max_count = 3; | |
188 | else if (!strcmp(argv[1], "-n") || | |
41bbf9d5 | 189 | !strcmp(argv[1], "--no-index")) { |
d516c2d1 | 190 | revs->max_count = -2; |
41bbf9d5 | 191 | revs->diffopt.exit_with_status = 1; |
6d2d9e86 | 192 | revs->diffopt.no_index = 1; |
41bbf9d5 | 193 | } |
d516c2d1 JS |
194 | else if (!strcmp(argv[1], "-q")) |
195 | *silent = 1; | |
196 | else | |
197 | return error("invalid option: %s", argv[1]); | |
198 | argv++; argc--; | |
199 | } | |
200 | ||
201 | if (revs->max_count == -1 && revs->diffopt.nr_paths == 2) { | |
202 | /* | |
203 | * If two files are specified, and at least one is untracked, | |
204 | * default to no-index. | |
205 | */ | |
206 | read_cache(); | |
207 | if (!is_in_index(revs->diffopt.paths[0]) || | |
6d2d9e86 | 208 | !is_in_index(revs->diffopt.paths[1])) { |
d516c2d1 | 209 | revs->max_count = -2; |
6d2d9e86 RS |
210 | revs->diffopt.no_index = 1; |
211 | } | |
d516c2d1 JS |
212 | } |
213 | ||
214 | /* | |
215 | * Make sure there are NO revision (i.e. pending object) parameter, | |
216 | * rev.max_count is reasonable (0 <= n <= 3), | |
217 | * there is no other revision filtering parameters. | |
218 | */ | |
219 | if (revs->pending.nr || revs->max_count > 3 || | |
220 | revs->min_age != -1 || revs->max_age != -1) | |
221 | return error("no revision allowed with diff-files"); | |
222 | ||
223 | if (revs->max_count == -1 && | |
224 | (revs->diffopt.output_format & DIFF_FORMAT_PATCH)) | |
225 | revs->combine_merges = revs->dense_combined_merges = 1; | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
fcfa33ec JS |
230 | static int is_outside_repo(const char *path, int nongit, const char *prefix) |
231 | { | |
232 | int i; | |
233 | if (nongit || !strcmp(path, "-") || path[0] == '/') | |
234 | return 1; | |
235 | if (prefixcmp(path, "../")) | |
236 | return 0; | |
237 | if (!prefix) | |
238 | return 1; | |
239 | for (i = strlen(prefix); !prefixcmp(path, "../"); ) { | |
240 | while (i > 0 && prefix[i - 1] != '/') | |
241 | i--; | |
242 | if (--i < 0) | |
243 | return 1; | |
244 | path += 3; | |
245 | } | |
246 | return 0; | |
247 | } | |
248 | ||
249 | int setup_diff_no_index(struct rev_info *revs, | |
250 | int argc, const char ** argv, int nongit, const char *prefix) | |
251 | { | |
252 | int i; | |
253 | for (i = 1; i < argc; i++) | |
5332b2af | 254 | if (argv[i][0] != '-' || argv[i][1] == '\0') |
fcfa33ec JS |
255 | break; |
256 | else if (!strcmp(argv[i], "--")) { | |
257 | i++; | |
258 | break; | |
259 | } else if (i < argc - 3 && !strcmp(argv[i], "--no-index")) { | |
260 | i = argc - 3; | |
41bbf9d5 | 261 | revs->diffopt.exit_with_status = 1; |
fcfa33ec JS |
262 | break; |
263 | } | |
264 | if (argc != i + 2 || (!is_outside_repo(argv[i + 1], nongit, prefix) && | |
265 | !is_outside_repo(argv[i], nongit, prefix))) | |
266 | return -1; | |
267 | ||
268 | diff_setup(&revs->diffopt); | |
269 | for (i = 1; i < argc - 2; ) | |
270 | if (!strcmp(argv[i], "--no-index")) | |
271 | i++; | |
272 | else { | |
273 | int j = diff_opt_parse(&revs->diffopt, | |
274 | argv + i, argc - i); | |
275 | if (!j) | |
276 | die("invalid diff option/value: %s", argv[i]); | |
277 | i += j; | |
278 | } | |
ae792aa5 JH |
279 | |
280 | if (prefix) { | |
281 | int len = strlen(prefix); | |
282 | ||
283 | revs->diffopt.paths = xcalloc(2, sizeof(char*)); | |
284 | for (i = 0; i < 2; i++) { | |
3afaa72d JH |
285 | const char *p = argv[argc - 2 + i]; |
286 | /* | |
287 | * stdin should be spelled as '-'; if you have | |
288 | * path that is '-', spell it as ./-. | |
289 | */ | |
290 | p = (strcmp(p, "-") | |
291 | ? xstrdup(prefix_filename(prefix, len, p)) | |
292 | : p); | |
293 | revs->diffopt.paths[i] = p; | |
ae792aa5 JH |
294 | } |
295 | } | |
296 | else | |
297 | revs->diffopt.paths = argv + argc - 2; | |
fcfa33ec | 298 | revs->diffopt.nr_paths = 2; |
6d2d9e86 | 299 | revs->diffopt.no_index = 1; |
fcfa33ec JS |
300 | revs->max_count = -2; |
301 | return 0; | |
302 | } | |
303 | ||
d516c2d1 JS |
304 | int run_diff_files_cmd(struct rev_info *revs, int argc, const char **argv) |
305 | { | |
306 | int silent_on_removed; | |
307 | ||
308 | if (handle_diff_files_args(revs, argc, argv, &silent_on_removed)) | |
309 | return -1; | |
310 | ||
6d2d9e86 | 311 | if (revs->diffopt.no_index) { |
d516c2d1 JS |
312 | if (revs->diffopt.nr_paths != 2) |
313 | return error("need two files/directories with --no-index"); | |
34a5e1a2 JS |
314 | if (queue_diff(&revs->diffopt, revs->diffopt.paths[0], |
315 | revs->diffopt.paths[1])) | |
316 | return -1; | |
d516c2d1 JS |
317 | diffcore_std(&revs->diffopt); |
318 | diff_flush(&revs->diffopt); | |
34a5e1a2 JS |
319 | /* |
320 | * The return code for --no-index imitates diff(1): | |
321 | * 0 = no changes, 1 = changes, else error | |
322 | */ | |
323 | return revs->diffopt.found_changes; | |
d516c2d1 JS |
324 | } |
325 | ||
efdfd6c8 JH |
326 | if (read_cache() < 0) { |
327 | perror("read_cache"); | |
328 | return -1; | |
329 | } | |
d516c2d1 JS |
330 | return run_diff_files(revs, silent_on_removed); |
331 | } | |
332 | ||
6973dcae | 333 | int run_diff_files(struct rev_info *revs, int silent_on_removed) |
f0c6b2a2 | 334 | { |
6973dcae JH |
335 | int entries, i; |
336 | int diff_unmerged_stage = revs->max_count; | |
f0c6b2a2 | 337 | |
6973dcae JH |
338 | if (diff_unmerged_stage < 0) |
339 | diff_unmerged_stage = 2; | |
b4e1e4a7 | 340 | entries = active_nr; |
6973dcae | 341 | for (i = 0; i < entries; i++) { |
be3cfa85 | 342 | struct stat st; |
6973dcae JH |
343 | unsigned int oldmode, newmode; |
344 | struct cache_entry *ce = active_cache[i]; | |
345 | int changed; | |
8676eb43 | 346 | |
822cac01 JH |
347 | if (revs->diffopt.quiet && revs->diffopt.has_changes) |
348 | break; | |
349 | ||
6973dcae | 350 | if (!ce_path_match(ce, revs->prune_data)) |
8676eb43 | 351 | continue; |
be3cfa85 | 352 | |
6973dcae | 353 | if (ce_stage(ce)) { |
b4b15503 | 354 | struct combine_diff_path *dpath; |
6973dcae | 355 | int num_compare_stages = 0; |
b4b15503 | 356 | size_t path_len; |
6973dcae | 357 | |
b4b15503 FF |
358 | path_len = ce_namelen(ce); |
359 | ||
4fc970c4 | 360 | dpath = xmalloc(combine_diff_path_size(5, path_len)); |
b4b15503 FF |
361 | dpath->path = (char *) &(dpath->parent[5]); |
362 | ||
363 | dpath->next = NULL; | |
364 | dpath->len = path_len; | |
365 | memcpy(dpath->path, ce->name, path_len); | |
366 | dpath->path[path_len] = '\0'; | |
a8e0d16d | 367 | hashclr(dpath->sha1); |
b4b15503 | 368 | memset(&(dpath->parent[0]), 0, |
4fc970c4 JH |
369 | sizeof(struct combine_diff_parent)*5); |
370 | ||
371 | if (lstat(ce->name, &st) < 0) { | |
372 | if (errno != ENOENT && errno != ENOTDIR) { | |
373 | perror(ce->name); | |
374 | continue; | |
375 | } | |
376 | if (silent_on_removed) | |
377 | continue; | |
378 | } | |
379 | else | |
844c11ae | 380 | dpath->mode = ntohl(ce_mode_from_stat(ce, st.st_mode)); |
6973dcae JH |
381 | |
382 | while (i < entries) { | |
383 | struct cache_entry *nce = active_cache[i]; | |
384 | int stage; | |
385 | ||
386 | if (strcmp(ce->name, nce->name)) | |
387 | break; | |
388 | ||
389 | /* Stage #2 (ours) is the first parent, | |
390 | * stage #3 (theirs) is the second. | |
391 | */ | |
392 | stage = ce_stage(nce); | |
393 | if (2 <= stage) { | |
394 | int mode = ntohl(nce->ce_mode); | |
395 | num_compare_stages++; | |
e702496e | 396 | hashcpy(dpath->parent[stage-2].sha1, nce->sha1); |
844c11ae | 397 | dpath->parent[stage-2].mode = ntohl(ce_mode_from_stat(nce, mode)); |
b4b15503 | 398 | dpath->parent[stage-2].status = |
6973dcae JH |
399 | DIFF_STATUS_MODIFIED; |
400 | } | |
401 | ||
402 | /* diff against the proper unmerged stage */ | |
403 | if (stage == diff_unmerged_stage) | |
404 | ce = nce; | |
405 | i++; | |
406 | } | |
407 | /* | |
408 | * Compensate for loop update | |
f0c6b2a2 | 409 | */ |
6973dcae | 410 | i--; |
6b5ee137 | 411 | |
6973dcae | 412 | if (revs->combine_merges && num_compare_stages == 2) { |
b4b15503 | 413 | show_combined_diff(dpath, 2, |
6973dcae JH |
414 | revs->dense_combined_merges, |
415 | revs); | |
b4b15503 | 416 | free(dpath); |
6973dcae | 417 | continue; |
1b1480ff | 418 | } |
b4b15503 FF |
419 | free(dpath); |
420 | dpath = NULL; | |
0e3994fa | 421 | |
6973dcae JH |
422 | /* |
423 | * Show the diff for the 'ce' if we found the one | |
424 | * from the desired stage. | |
425 | */ | |
e9c84099 | 426 | diff_unmerge(&revs->diffopt, ce->name, 0, null_sha1); |
6973dcae JH |
427 | if (ce_stage(ce) != diff_unmerged_stage) |
428 | continue; | |
eeaa4603 | 429 | } |
6b14d7fa | 430 | |
6973dcae JH |
431 | if (lstat(ce->name, &st) < 0) { |
432 | if (errno != ENOENT && errno != ENOTDIR) { | |
433 | perror(ce->name); | |
15d061b4 JH |
434 | continue; |
435 | } | |
6973dcae JH |
436 | if (silent_on_removed) |
437 | continue; | |
438 | diff_addremove(&revs->diffopt, '-', ntohl(ce->ce_mode), | |
439 | ce->sha1, ce->name, NULL); | |
440 | continue; | |
f2ce9fde | 441 | } |
6973dcae JH |
442 | changed = ce_match_stat(ce, &st, 0); |
443 | if (!changed && !revs->diffopt.find_copies_harder) | |
444 | continue; | |
445 | oldmode = ntohl(ce->ce_mode); | |
844c11ae | 446 | newmode = ntohl(ce_mode_from_stat(ce, st.st_mode)); |
6973dcae JH |
447 | diff_change(&revs->diffopt, oldmode, newmode, |
448 | ce->sha1, (changed ? null_sha1 : ce->sha1), | |
449 | ce->name, NULL); | |
77eb2720 | 450 | |
7ca45252 | 451 | } |
6973dcae JH |
452 | diffcore_std(&revs->diffopt); |
453 | diff_flush(&revs->diffopt); | |
454 | return 0; | |
77eb2720 | 455 | } |
be3cfa85 | 456 | |
e09ad6e1 JH |
457 | /* |
458 | * diff-index | |
459 | */ | |
460 | ||
461 | /* A file entry went away or appeared */ | |
462 | static void diff_index_show_file(struct rev_info *revs, | |
463 | const char *prefix, | |
464 | struct cache_entry *ce, | |
465 | unsigned char *sha1, unsigned int mode) | |
466 | { | |
467 | diff_addremove(&revs->diffopt, prefix[0], ntohl(mode), | |
468 | sha1, ce->name, NULL); | |
469 | } | |
470 | ||
471 | static int get_stat_data(struct cache_entry *ce, | |
472 | unsigned char **sha1p, | |
473 | unsigned int *modep, | |
474 | int cached, int match_missing) | |
475 | { | |
476 | unsigned char *sha1 = ce->sha1; | |
477 | unsigned int mode = ce->ce_mode; | |
478 | ||
479 | if (!cached) { | |
480 | static unsigned char no_sha1[20]; | |
481 | int changed; | |
482 | struct stat st; | |
483 | if (lstat(ce->name, &st) < 0) { | |
484 | if (errno == ENOENT && match_missing) { | |
485 | *sha1p = sha1; | |
486 | *modep = mode; | |
487 | return 0; | |
488 | } | |
489 | return -1; | |
490 | } | |
491 | changed = ce_match_stat(ce, &st, 0); | |
492 | if (changed) { | |
185c975f | 493 | mode = ce_mode_from_stat(ce, st.st_mode); |
e09ad6e1 JH |
494 | sha1 = no_sha1; |
495 | } | |
496 | } | |
497 | ||
498 | *sha1p = sha1; | |
499 | *modep = mode; | |
500 | return 0; | |
501 | } | |
502 | ||
503 | static void show_new_file(struct rev_info *revs, | |
504 | struct cache_entry *new, | |
505 | int cached, int match_missing) | |
506 | { | |
507 | unsigned char *sha1; | |
508 | unsigned int mode; | |
509 | ||
510 | /* New file in the index: it might actually be different in | |
511 | * the working copy. | |
512 | */ | |
513 | if (get_stat_data(new, &sha1, &mode, cached, match_missing) < 0) | |
514 | return; | |
515 | ||
516 | diff_index_show_file(revs, "+", new, sha1, mode); | |
517 | } | |
518 | ||
519 | static int show_modified(struct rev_info *revs, | |
520 | struct cache_entry *old, | |
521 | struct cache_entry *new, | |
522 | int report_missing, | |
523 | int cached, int match_missing) | |
524 | { | |
525 | unsigned int mode, oldmode; | |
526 | unsigned char *sha1; | |
527 | ||
528 | if (get_stat_data(new, &sha1, &mode, cached, match_missing) < 0) { | |
529 | if (report_missing) | |
530 | diff_index_show_file(revs, "-", old, | |
531 | old->sha1, old->ce_mode); | |
532 | return -1; | |
533 | } | |
534 | ||
cb2b9f5e PM |
535 | if (revs->combine_merges && !cached && |
536 | (hashcmp(sha1, old->sha1) || hashcmp(old->sha1, new->sha1))) { | |
537 | struct combine_diff_path *p; | |
538 | int pathlen = ce_namelen(new); | |
539 | ||
540 | p = xmalloc(combine_diff_path_size(2, pathlen)); | |
541 | p->path = (char *) &p->parent[2]; | |
542 | p->next = NULL; | |
543 | p->len = pathlen; | |
544 | memcpy(p->path, new->name, pathlen); | |
545 | p->path[pathlen] = 0; | |
546 | p->mode = ntohl(mode); | |
547 | hashclr(p->sha1); | |
548 | memset(p->parent, 0, 2 * sizeof(struct combine_diff_parent)); | |
549 | p->parent[0].status = DIFF_STATUS_MODIFIED; | |
550 | p->parent[0].mode = ntohl(new->ce_mode); | |
551 | hashcpy(p->parent[0].sha1, new->sha1); | |
552 | p->parent[1].status = DIFF_STATUS_MODIFIED; | |
553 | p->parent[1].mode = ntohl(old->ce_mode); | |
554 | hashcpy(p->parent[1].sha1, old->sha1); | |
555 | show_combined_diff(p, 2, revs->dense_combined_merges, revs); | |
556 | free(p); | |
557 | return 0; | |
558 | } | |
559 | ||
e09ad6e1 | 560 | oldmode = old->ce_mode; |
a89fccd2 | 561 | if (mode == oldmode && !hashcmp(sha1, old->sha1) && |
e09ad6e1 JH |
562 | !revs->diffopt.find_copies_harder) |
563 | return 0; | |
564 | ||
565 | mode = ntohl(mode); | |
566 | oldmode = ntohl(oldmode); | |
567 | ||
568 | diff_change(&revs->diffopt, oldmode, mode, | |
569 | old->sha1, sha1, old->name, NULL); | |
570 | return 0; | |
571 | } | |
572 | ||
573 | static int diff_cache(struct rev_info *revs, | |
574 | struct cache_entry **ac, int entries, | |
575 | const char **pathspec, | |
576 | int cached, int match_missing) | |
577 | { | |
578 | while (entries) { | |
579 | struct cache_entry *ce = *ac; | |
580 | int same = (entries > 1) && ce_same_name(ce, ac[1]); | |
581 | ||
822cac01 JH |
582 | if (revs->diffopt.quiet && revs->diffopt.has_changes) |
583 | break; | |
584 | ||
e09ad6e1 JH |
585 | if (!ce_path_match(ce, pathspec)) |
586 | goto skip_entry; | |
587 | ||
588 | switch (ce_stage(ce)) { | |
589 | case 0: | |
590 | /* No stage 1 entry? That means it's a new file */ | |
591 | if (!same) { | |
592 | show_new_file(revs, ce, cached, match_missing); | |
593 | break; | |
594 | } | |
595 | /* Show difference between old and new */ | |
1cfe7733 | 596 | show_modified(revs, ac[1], ce, 1, |
e09ad6e1 JH |
597 | cached, match_missing); |
598 | break; | |
599 | case 1: | |
600 | /* No stage 3 (merge) entry? | |
601 | * That means it's been deleted. | |
602 | */ | |
603 | if (!same) { | |
604 | diff_index_show_file(revs, "-", ce, | |
605 | ce->sha1, ce->ce_mode); | |
606 | break; | |
607 | } | |
608 | /* We come here with ce pointing at stage 1 | |
609 | * (original tree) and ac[1] pointing at stage | |
610 | * 3 (unmerged). show-modified with | |
611 | * report-missing set to false does not say the | |
612 | * file is deleted but reports true if work | |
613 | * tree does not have it, in which case we | |
614 | * fall through to report the unmerged state. | |
615 | * Otherwise, we show the differences between | |
616 | * the original tree and the work tree. | |
617 | */ | |
618 | if (!cached && | |
619 | !show_modified(revs, ce, ac[1], 0, | |
620 | cached, match_missing)) | |
621 | break; | |
e9c84099 JH |
622 | diff_unmerge(&revs->diffopt, ce->name, |
623 | ntohl(ce->ce_mode), ce->sha1); | |
624 | break; | |
e09ad6e1 | 625 | case 3: |
e9c84099 JH |
626 | diff_unmerge(&revs->diffopt, ce->name, |
627 | 0, null_sha1); | |
e09ad6e1 JH |
628 | break; |
629 | ||
630 | default: | |
631 | die("impossible cache entry stage"); | |
632 | } | |
633 | ||
634 | skip_entry: | |
635 | /* | |
636 | * Ignore all the different stages for this file, | |
637 | * we've handled the relevant cases now. | |
638 | */ | |
639 | do { | |
640 | ac++; | |
641 | entries--; | |
642 | } while (entries && ce_same_name(ce, ac[0])); | |
643 | } | |
644 | return 0; | |
645 | } | |
646 | ||
647 | /* | |
648 | * This turns all merge entries into "stage 3". That guarantees that | |
649 | * when we read in the new tree (into "stage 1"), we won't lose sight | |
650 | * of the fact that we had unmerged entries. | |
651 | */ | |
652 | static void mark_merge_entries(void) | |
653 | { | |
654 | int i; | |
655 | for (i = 0; i < active_nr; i++) { | |
656 | struct cache_entry *ce = active_cache[i]; | |
657 | if (!ce_stage(ce)) | |
658 | continue; | |
659 | ce->ce_flags |= htons(CE_STAGEMASK); | |
660 | } | |
661 | } | |
662 | ||
5c21ac0e | 663 | int run_diff_index(struct rev_info *revs, int cached) |
e09ad6e1 JH |
664 | { |
665 | int ret; | |
666 | struct object *ent; | |
667 | struct tree *tree; | |
668 | const char *tree_name; | |
5c21ac0e JH |
669 | int match_missing = 0; |
670 | ||
a6080a0a | 671 | /* |
5c21ac0e JH |
672 | * Backward compatibility wart - "diff-index -m" does |
673 | * not mean "do not ignore merges", but totally different. | |
674 | */ | |
675 | if (!revs->ignore_merges) | |
676 | match_missing = 1; | |
e09ad6e1 | 677 | |
e09ad6e1 JH |
678 | mark_merge_entries(); |
679 | ||
1f1e895f LT |
680 | ent = revs->pending.objects[0].item; |
681 | tree_name = revs->pending.objects[0].name; | |
e09ad6e1 JH |
682 | tree = parse_tree_indirect(ent->sha1); |
683 | if (!tree) | |
684 | return error("bad tree object %s", tree_name); | |
685 | if (read_tree(tree, 1, revs->prune_data)) | |
686 | return error("unable to read tree object %s", tree_name); | |
687 | ret = diff_cache(revs, active_cache, active_nr, revs->prune_data, | |
688 | cached, match_missing); | |
689 | diffcore_std(&revs->diffopt); | |
690 | diff_flush(&revs->diffopt); | |
691 | return ret; | |
692 | } | |
1cfe7733 JH |
693 | |
694 | int do_diff_cache(const unsigned char *tree_sha1, struct diff_options *opt) | |
695 | { | |
696 | struct tree *tree; | |
697 | struct rev_info revs; | |
698 | int i; | |
699 | struct cache_entry **dst; | |
700 | struct cache_entry *last = NULL; | |
701 | ||
702 | /* | |
703 | * This is used by git-blame to run diff-cache internally; | |
704 | * it potentially needs to repeatedly run this, so we will | |
705 | * start by removing the higher order entries the last round | |
706 | * left behind. | |
707 | */ | |
708 | dst = active_cache; | |
709 | for (i = 0; i < active_nr; i++) { | |
710 | struct cache_entry *ce = active_cache[i]; | |
711 | if (ce_stage(ce)) { | |
712 | if (last && !strcmp(ce->name, last->name)) | |
713 | continue; | |
714 | cache_tree_invalidate_path(active_cache_tree, | |
715 | ce->name); | |
716 | last = ce; | |
717 | ce->ce_mode = 0; | |
718 | ce->ce_flags &= ~htons(CE_STAGEMASK); | |
719 | } | |
720 | *dst++ = ce; | |
721 | } | |
722 | active_nr = dst - active_cache; | |
723 | ||
724 | init_revisions(&revs, NULL); | |
725 | revs.prune_data = opt->paths; | |
726 | tree = parse_tree_indirect(tree_sha1); | |
727 | if (!tree) | |
728 | die("bad tree object %s", sha1_to_hex(tree_sha1)); | |
729 | if (read_tree(tree, 1, opt->paths)) | |
730 | return error("unable to read tree %s", sha1_to_hex(tree_sha1)); | |
731 | return diff_cache(&revs, active_cache, active_nr, revs.prune_data, | |
732 | 1, 0); | |
733 | } |