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Commit | Line | Data |
---|---|---|
cee7f245 | 1 | /* |
31653c1a | 2 | * Blame |
cee7f245 JH |
3 | * |
4 | * Copyright (c) 2006, Junio C Hamano | |
5 | */ | |
6 | ||
7 | #include "cache.h" | |
8 | #include "builtin.h" | |
9 | #include "blob.h" | |
10 | #include "commit.h" | |
11 | #include "tag.h" | |
12 | #include "tree-walk.h" | |
13 | #include "diff.h" | |
14 | #include "diffcore.h" | |
15 | #include "revision.h" | |
717d1462 | 16 | #include "quote.h" |
cee7f245 | 17 | #include "xdiff-interface.h" |
1cfe7733 | 18 | #include "cache-tree.h" |
c455c87c | 19 | #include "string-list.h" |
f9567384 | 20 | #include "mailmap.h" |
5817da01 | 21 | #include "parse-options.h" |
ffaf9cc0 | 22 | #include "utf8.h" |
3b8a12e8 | 23 | #include "userdiff.h" |
cee7f245 | 24 | |
588c038a | 25 | static char blame_usage[] = "git blame [options] [rev-opts] [rev] [--] file"; |
5817da01 PH |
26 | |
27 | static const char *blame_opt_usage[] = { | |
28 | blame_usage, | |
29 | "", | |
76447d23 | 30 | "[rev-opts] are documented in git-rev-list(1)", |
5817da01 PH |
31 | NULL |
32 | }; | |
cee7f245 JH |
33 | |
34 | static int longest_file; | |
35 | static int longest_author; | |
36 | static int max_orig_digits; | |
37 | static int max_digits; | |
5ff62c30 | 38 | static int max_score_digits; |
4c10a5ca | 39 | static int show_root; |
85af7929 | 40 | static int reverse; |
4c10a5ca | 41 | static int blank_boundary; |
717d1462 | 42 | static int incremental; |
582aa00b | 43 | static int xdl_opts; |
84393bfd | 44 | static int abbrev = -1; |
31653c1a EL |
45 | |
46 | static enum date_mode blame_date_mode = DATE_ISO8601; | |
47 | static size_t blame_date_width; | |
48 | ||
c455c87c | 49 | static struct string_list mailmap; |
cee7f245 | 50 | |
54a4c617 JH |
51 | #ifndef DEBUG |
52 | #define DEBUG 0 | |
53 | #endif | |
54 | ||
c2e525d9 JH |
55 | /* stats */ |
56 | static int num_read_blob; | |
57 | static int num_get_patch; | |
58 | static int num_commits; | |
59 | ||
d24bba80 | 60 | #define PICKAXE_BLAME_MOVE 01 |
18abd745 JH |
61 | #define PICKAXE_BLAME_COPY 02 |
62 | #define PICKAXE_BLAME_COPY_HARDER 04 | |
c63777c0 | 63 | #define PICKAXE_BLAME_COPY_HARDEST 010 |
d24bba80 | 64 | |
4a0fc95f JH |
65 | /* |
66 | * blame for a blame_entry with score lower than these thresholds | |
67 | * is not passed to the parent using move/copy logic. | |
68 | */ | |
69 | static unsigned blame_move_score; | |
70 | static unsigned blame_copy_score; | |
71 | #define BLAME_DEFAULT_MOVE_SCORE 20 | |
72 | #define BLAME_DEFAULT_COPY_SCORE 40 | |
73 | ||
cee7f245 JH |
74 | /* bits #0..7 in revision.h, #8..11 used for merge_bases() in commit.c */ |
75 | #define METAINFO_SHOWN (1u<<12) | |
76 | #define MORE_THAN_ONE_PATH (1u<<13) | |
77 | ||
78 | /* | |
54a4c617 | 79 | * One blob in a commit that is being suspected |
cee7f245 JH |
80 | */ |
81 | struct origin { | |
54a4c617 | 82 | int refcnt; |
96e11709 | 83 | struct origin *previous; |
cee7f245 | 84 | struct commit *commit; |
c2e525d9 | 85 | mmfile_t file; |
cee7f245 | 86 | unsigned char blob_sha1[20]; |
90064710 | 87 | unsigned mode; |
cee7f245 JH |
88 | char path[FLEX_ARRAY]; |
89 | }; | |
90 | ||
3b8a12e8 AB |
91 | /* |
92 | * Prepare diff_filespec and convert it using diff textconv API | |
93 | * if the textconv driver exists. | |
94 | * Return 1 if the conversion succeeds, 0 otherwise. | |
95 | */ | |
e5fba602 | 96 | int textconv_object(const char *path, |
90064710 | 97 | unsigned mode, |
e5fba602 CP |
98 | const unsigned char *sha1, |
99 | char **buf, | |
100 | unsigned long *buf_size) | |
3b8a12e8 AB |
101 | { |
102 | struct diff_filespec *df; | |
103 | struct userdiff_driver *textconv; | |
104 | ||
105 | df = alloc_filespec(path); | |
90064710 | 106 | fill_filespec(df, sha1, mode); |
3b8a12e8 AB |
107 | textconv = get_textconv(df); |
108 | if (!textconv) { | |
109 | free_filespec(df); | |
110 | return 0; | |
111 | } | |
112 | ||
113 | *buf_size = fill_textconv(textconv, df, buf); | |
114 | free_filespec(df); | |
115 | return 1; | |
116 | } | |
117 | ||
1732a1fd JH |
118 | /* |
119 | * Given an origin, prepare mmfile_t structure to be used by the | |
120 | * diff machinery | |
121 | */ | |
3b8a12e8 AB |
122 | static void fill_origin_blob(struct diff_options *opt, |
123 | struct origin *o, mmfile_t *file) | |
c2e525d9 JH |
124 | { |
125 | if (!o->file.ptr) { | |
21666f1a | 126 | enum object_type type; |
3b8a12e8 AB |
127 | unsigned long file_size; |
128 | ||
c2e525d9 | 129 | num_read_blob++; |
3b8a12e8 | 130 | if (DIFF_OPT_TST(opt, ALLOW_TEXTCONV) && |
90064710 | 131 | textconv_object(o->path, o->mode, o->blob_sha1, &file->ptr, &file_size)) |
3b8a12e8 AB |
132 | ; |
133 | else | |
134 | file->ptr = read_sha1_file(o->blob_sha1, &type, &file_size); | |
135 | file->size = file_size; | |
136 | ||
ab43e495 JH |
137 | if (!file->ptr) |
138 | die("Cannot read blob %s for path %s", | |
139 | sha1_to_hex(o->blob_sha1), | |
140 | o->path); | |
c2e525d9 JH |
141 | o->file = *file; |
142 | } | |
143 | else | |
144 | *file = o->file; | |
c2e525d9 JH |
145 | } |
146 | ||
1732a1fd JH |
147 | /* |
148 | * Origin is refcounted and usually we keep the blob contents to be | |
149 | * reused. | |
150 | */ | |
54a4c617 JH |
151 | static inline struct origin *origin_incref(struct origin *o) |
152 | { | |
153 | if (o) | |
154 | o->refcnt++; | |
155 | return o; | |
156 | } | |
157 | ||
158 | static void origin_decref(struct origin *o) | |
159 | { | |
160 | if (o && --o->refcnt <= 0) { | |
96e11709 JH |
161 | if (o->previous) |
162 | origin_decref(o->previous); | |
8e0f7003 | 163 | free(o->file.ptr); |
54a4c617 JH |
164 | free(o); |
165 | } | |
166 | } | |
167 | ||
7c3c7962 JH |
168 | static void drop_origin_blob(struct origin *o) |
169 | { | |
170 | if (o->file.ptr) { | |
171 | free(o->file.ptr); | |
172 | o->file.ptr = NULL; | |
173 | } | |
174 | } | |
175 | ||
1732a1fd JH |
176 | /* |
177 | * Each group of lines is described by a blame_entry; it can be split | |
178 | * as we pass blame to the parents. They form a linked list in the | |
179 | * scoreboard structure, sorted by the target line number. | |
180 | */ | |
cee7f245 JH |
181 | struct blame_entry { |
182 | struct blame_entry *prev; | |
183 | struct blame_entry *next; | |
184 | ||
185 | /* the first line of this group in the final image; | |
186 | * internally all line numbers are 0 based. | |
187 | */ | |
188 | int lno; | |
189 | ||
190 | /* how many lines this group has */ | |
191 | int num_lines; | |
192 | ||
193 | /* the commit that introduced this group into the final image */ | |
194 | struct origin *suspect; | |
195 | ||
196 | /* true if the suspect is truly guilty; false while we have not | |
197 | * checked if the group came from one of its parents. | |
198 | */ | |
199 | char guilty; | |
200 | ||
eb46328e AG |
201 | /* true if the entry has been scanned for copies in the current parent |
202 | */ | |
203 | char scanned; | |
204 | ||
cee7f245 JH |
205 | /* the line number of the first line of this group in the |
206 | * suspect's file; internally all line numbers are 0 based. | |
207 | */ | |
208 | int s_lno; | |
5ff62c30 JH |
209 | |
210 | /* how significant this entry is -- cached to avoid | |
1732a1fd | 211 | * scanning the lines over and over. |
5ff62c30 JH |
212 | */ |
213 | unsigned score; | |
cee7f245 JH |
214 | }; |
215 | ||
1732a1fd JH |
216 | /* |
217 | * The current state of the blame assignment. | |
218 | */ | |
cee7f245 JH |
219 | struct scoreboard { |
220 | /* the final commit (i.e. where we started digging from) */ | |
221 | struct commit *final; | |
85af7929 | 222 | struct rev_info *revs; |
cee7f245 JH |
223 | const char *path; |
224 | ||
1732a1fd JH |
225 | /* |
226 | * The contents in the final image. | |
227 | * Used by many functions to obtain contents of the nth line, | |
228 | * indexed with scoreboard.lineno[blame_entry.lno]. | |
cee7f245 JH |
229 | */ |
230 | const char *final_buf; | |
231 | unsigned long final_buf_size; | |
232 | ||
233 | /* linked list of blames */ | |
234 | struct blame_entry *ent; | |
235 | ||
612702e8 | 236 | /* look-up a line in the final buffer */ |
cee7f245 JH |
237 | int num_lines; |
238 | int *lineno; | |
239 | }; | |
240 | ||
171dccd5 | 241 | static inline int same_suspect(struct origin *a, struct origin *b) |
46014766 | 242 | { |
171dccd5 | 243 | if (a == b) |
57584d9e | 244 | return 1; |
171dccd5 JH |
245 | if (a->commit != b->commit) |
246 | return 0; | |
247 | return !strcmp(a->path, b->path); | |
46014766 JH |
248 | } |
249 | ||
54a4c617 JH |
250 | static void sanity_check_refcnt(struct scoreboard *); |
251 | ||
1732a1fd JH |
252 | /* |
253 | * If two blame entries that are next to each other came from | |
254 | * contiguous lines in the same origin (i.e. <commit, path> pair), | |
255 | * merge them together. | |
256 | */ | |
cee7f245 JH |
257 | static void coalesce(struct scoreboard *sb) |
258 | { | |
259 | struct blame_entry *ent, *next; | |
260 | ||
261 | for (ent = sb->ent; ent && (next = ent->next); ent = next) { | |
171dccd5 | 262 | if (same_suspect(ent->suspect, next->suspect) && |
cee7f245 JH |
263 | ent->guilty == next->guilty && |
264 | ent->s_lno + ent->num_lines == next->s_lno) { | |
265 | ent->num_lines += next->num_lines; | |
266 | ent->next = next->next; | |
267 | if (ent->next) | |
268 | ent->next->prev = ent; | |
54a4c617 | 269 | origin_decref(next->suspect); |
cee7f245 | 270 | free(next); |
46014766 | 271 | ent->score = 0; |
cee7f245 JH |
272 | next = ent; /* again */ |
273 | } | |
274 | } | |
54a4c617 JH |
275 | |
276 | if (DEBUG) /* sanity */ | |
277 | sanity_check_refcnt(sb); | |
cee7f245 JH |
278 | } |
279 | ||
1732a1fd JH |
280 | /* |
281 | * Given a commit and a path in it, create a new origin structure. | |
282 | * The callers that add blame to the scoreboard should use | |
283 | * get_origin() to obtain shared, refcounted copy instead of calling | |
284 | * this function directly. | |
285 | */ | |
854b97f6 JH |
286 | static struct origin *make_origin(struct commit *commit, const char *path) |
287 | { | |
288 | struct origin *o; | |
289 | o = xcalloc(1, sizeof(*o) + strlen(path) + 1); | |
290 | o->commit = commit; | |
291 | o->refcnt = 1; | |
292 | strcpy(o->path, path); | |
293 | return o; | |
294 | } | |
295 | ||
1732a1fd JH |
296 | /* |
297 | * Locate an existing origin or create a new one. | |
298 | */ | |
f6c0e191 JH |
299 | static struct origin *get_origin(struct scoreboard *sb, |
300 | struct commit *commit, | |
301 | const char *path) | |
cee7f245 | 302 | { |
f6c0e191 | 303 | struct blame_entry *e; |
cee7f245 | 304 | |
f6c0e191 JH |
305 | for (e = sb->ent; e; e = e->next) { |
306 | if (e->suspect->commit == commit && | |
307 | !strcmp(e->suspect->path, path)) | |
54a4c617 | 308 | return origin_incref(e->suspect); |
cee7f245 | 309 | } |
854b97f6 | 310 | return make_origin(commit, path); |
cee7f245 JH |
311 | } |
312 | ||
1732a1fd JH |
313 | /* |
314 | * Fill the blob_sha1 field of an origin if it hasn't, so that later | |
315 | * call to fill_origin_blob() can use it to locate the data. blob_sha1 | |
316 | * for an origin is also used to pass the blame for the entire file to | |
317 | * the parent to detect the case where a child's blob is identical to | |
318 | * that of its parent's. | |
90064710 KS |
319 | * |
320 | * This also fills origin->mode for corresponding tree path. | |
1732a1fd | 321 | */ |
90064710 | 322 | static int fill_blob_sha1_and_mode(struct origin *origin) |
f6c0e191 | 323 | { |
f6c0e191 JH |
324 | if (!is_null_sha1(origin->blob_sha1)) |
325 | return 0; | |
326 | if (get_tree_entry(origin->commit->object.sha1, | |
327 | origin->path, | |
90064710 | 328 | origin->blob_sha1, &origin->mode)) |
f6c0e191 | 329 | goto error_out; |
21666f1a | 330 | if (sha1_object_info(origin->blob_sha1, NULL) != OBJ_BLOB) |
f6c0e191 JH |
331 | goto error_out; |
332 | return 0; | |
333 | error_out: | |
334 | hashclr(origin->blob_sha1); | |
90064710 | 335 | origin->mode = S_IFINVALID; |
f6c0e191 JH |
336 | return -1; |
337 | } | |
338 | ||
1732a1fd JH |
339 | /* |
340 | * We have an origin -- check if the same path exists in the | |
341 | * parent and return an origin structure to represent it. | |
342 | */ | |
f6c0e191 | 343 | static struct origin *find_origin(struct scoreboard *sb, |
cee7f245 JH |
344 | struct commit *parent, |
345 | struct origin *origin) | |
346 | { | |
347 | struct origin *porigin = NULL; | |
348 | struct diff_options diff_opts; | |
f6c0e191 JH |
349 | const char *paths[2]; |
350 | ||
0d981c67 | 351 | if (parent->util) { |
1732a1fd JH |
352 | /* |
353 | * Each commit object can cache one origin in that | |
354 | * commit. This is a freestanding copy of origin and | |
355 | * not refcounted. | |
854b97f6 | 356 | */ |
0d981c67 | 357 | struct origin *cached = parent->util; |
854b97f6 | 358 | if (!strcmp(cached->path, origin->path)) { |
1732a1fd JH |
359 | /* |
360 | * The same path between origin and its parent | |
361 | * without renaming -- the most common case. | |
362 | */ | |
854b97f6 | 363 | porigin = get_origin(sb, parent, cached->path); |
1732a1fd JH |
364 | |
365 | /* | |
366 | * If the origin was newly created (i.e. get_origin | |
367 | * would call make_origin if none is found in the | |
90064710 | 368 | * scoreboard), it does not know the blob_sha1/mode, |
1732a1fd | 369 | * so copy it. Otherwise porigin was in the |
90064710 | 370 | * scoreboard and already knows blob_sha1/mode. |
1732a1fd | 371 | */ |
90064710 | 372 | if (porigin->refcnt == 1) { |
854b97f6 | 373 | hashcpy(porigin->blob_sha1, cached->blob_sha1); |
90064710 KS |
374 | porigin->mode = cached->mode; |
375 | } | |
854b97f6 JH |
376 | return porigin; |
377 | } | |
378 | /* otherwise it was not very useful; free it */ | |
379 | free(parent->util); | |
380 | parent->util = NULL; | |
0d981c67 JH |
381 | } |
382 | ||
f6c0e191 JH |
383 | /* See if the origin->path is different between parent |
384 | * and origin first. Most of the time they are the | |
385 | * same and diff-tree is fairly efficient about this. | |
386 | */ | |
387 | diff_setup(&diff_opts); | |
8f67f8ae | 388 | DIFF_OPT_SET(&diff_opts, RECURSIVE); |
f6c0e191 JH |
389 | diff_opts.detect_rename = 0; |
390 | diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
391 | paths[0] = origin->path; | |
392 | paths[1] = NULL; | |
393 | ||
394 | diff_tree_setup_paths(paths, &diff_opts); | |
395 | if (diff_setup_done(&diff_opts) < 0) | |
396 | die("diff-setup"); | |
1cfe7733 JH |
397 | |
398 | if (is_null_sha1(origin->commit->object.sha1)) | |
399 | do_diff_cache(parent->tree->object.sha1, &diff_opts); | |
400 | else | |
401 | diff_tree_sha1(parent->tree->object.sha1, | |
402 | origin->commit->tree->object.sha1, | |
403 | "", &diff_opts); | |
f6c0e191 JH |
404 | diffcore_std(&diff_opts); |
405 | ||
f6c0e191 JH |
406 | if (!diff_queued_diff.nr) { |
407 | /* The path is the same as parent */ | |
408 | porigin = get_origin(sb, parent, origin->path); | |
409 | hashcpy(porigin->blob_sha1, origin->blob_sha1); | |
90064710 | 410 | porigin->mode = origin->mode; |
a9b2d424 JH |
411 | } else { |
412 | /* | |
413 | * Since origin->path is a pathspec, if the parent | |
414 | * commit had it as a directory, we will see a whole | |
415 | * bunch of deletion of files in the directory that we | |
416 | * do not care about. | |
417 | */ | |
418 | int i; | |
419 | struct diff_filepair *p = NULL; | |
420 | for (i = 0; i < diff_queued_diff.nr; i++) { | |
421 | const char *name; | |
422 | p = diff_queued_diff.queue[i]; | |
423 | name = p->one->path ? p->one->path : p->two->path; | |
424 | if (!strcmp(name, origin->path)) | |
425 | break; | |
426 | } | |
427 | if (!p) | |
428 | die("internal error in blame::find_origin"); | |
f6c0e191 JH |
429 | switch (p->status) { |
430 | default: | |
acca687f | 431 | die("internal error in blame::find_origin (%c)", |
f6c0e191 JH |
432 | p->status); |
433 | case 'M': | |
434 | porigin = get_origin(sb, parent, origin->path); | |
435 | hashcpy(porigin->blob_sha1, p->one->sha1); | |
90064710 | 436 | porigin->mode = p->one->mode; |
f6c0e191 JH |
437 | break; |
438 | case 'A': | |
439 | case 'T': | |
440 | /* Did not exist in parent, or type changed */ | |
441 | break; | |
442 | } | |
443 | } | |
444 | diff_flush(&diff_opts); | |
03b69c76 | 445 | diff_tree_release_paths(&diff_opts); |
0d981c67 | 446 | if (porigin) { |
1732a1fd JH |
447 | /* |
448 | * Create a freestanding copy that is not part of | |
449 | * the refcounted origin found in the scoreboard, and | |
450 | * cache it in the commit. | |
451 | */ | |
854b97f6 | 452 | struct origin *cached; |
1732a1fd | 453 | |
854b97f6 JH |
454 | cached = make_origin(porigin->commit, porigin->path); |
455 | hashcpy(cached->blob_sha1, porigin->blob_sha1); | |
90064710 | 456 | cached->mode = porigin->mode; |
854b97f6 | 457 | parent->util = cached; |
0d981c67 | 458 | } |
f69e743d JH |
459 | return porigin; |
460 | } | |
f6c0e191 | 461 | |
1732a1fd JH |
462 | /* |
463 | * We have an origin -- find the path that corresponds to it in its | |
464 | * parent and return an origin structure to represent it. | |
465 | */ | |
f69e743d JH |
466 | static struct origin *find_rename(struct scoreboard *sb, |
467 | struct commit *parent, | |
468 | struct origin *origin) | |
469 | { | |
470 | struct origin *porigin = NULL; | |
471 | struct diff_options diff_opts; | |
472 | int i; | |
473 | const char *paths[2]; | |
cee7f245 JH |
474 | |
475 | diff_setup(&diff_opts); | |
8f67f8ae | 476 | DIFF_OPT_SET(&diff_opts, RECURSIVE); |
cee7f245 JH |
477 | diff_opts.detect_rename = DIFF_DETECT_RENAME; |
478 | diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
2f3f8b21 | 479 | diff_opts.single_follow = origin->path; |
cee7f245 JH |
480 | paths[0] = NULL; |
481 | diff_tree_setup_paths(paths, &diff_opts); | |
482 | if (diff_setup_done(&diff_opts) < 0) | |
483 | die("diff-setup"); | |
1cfe7733 JH |
484 | |
485 | if (is_null_sha1(origin->commit->object.sha1)) | |
486 | do_diff_cache(parent->tree->object.sha1, &diff_opts); | |
487 | else | |
488 | diff_tree_sha1(parent->tree->object.sha1, | |
489 | origin->commit->tree->object.sha1, | |
490 | "", &diff_opts); | |
cee7f245 JH |
491 | diffcore_std(&diff_opts); |
492 | ||
493 | for (i = 0; i < diff_queued_diff.nr; i++) { | |
494 | struct diff_filepair *p = diff_queued_diff.queue[i]; | |
612702e8 | 495 | if ((p->status == 'R' || p->status == 'C') && |
f6c0e191 JH |
496 | !strcmp(p->two->path, origin->path)) { |
497 | porigin = get_origin(sb, parent, p->one->path); | |
498 | hashcpy(porigin->blob_sha1, p->one->sha1); | |
90064710 | 499 | porigin->mode = p->one->mode; |
cee7f245 JH |
500 | break; |
501 | } | |
502 | } | |
503 | diff_flush(&diff_opts); | |
03b69c76 | 504 | diff_tree_release_paths(&diff_opts); |
cee7f245 JH |
505 | return porigin; |
506 | } | |
507 | ||
1732a1fd | 508 | /* |
3dff5379 | 509 | * Link in a new blame entry to the scoreboard. Entries that cover the |
1732a1fd JH |
510 | * same line range have been removed from the scoreboard previously. |
511 | */ | |
cee7f245 JH |
512 | static void add_blame_entry(struct scoreboard *sb, struct blame_entry *e) |
513 | { | |
514 | struct blame_entry *ent, *prev = NULL; | |
515 | ||
54a4c617 JH |
516 | origin_incref(e->suspect); |
517 | ||
cee7f245 JH |
518 | for (ent = sb->ent; ent && ent->lno < e->lno; ent = ent->next) |
519 | prev = ent; | |
520 | ||
521 | /* prev, if not NULL, is the last one that is below e */ | |
522 | e->prev = prev; | |
523 | if (prev) { | |
524 | e->next = prev->next; | |
525 | prev->next = e; | |
526 | } | |
527 | else { | |
528 | e->next = sb->ent; | |
529 | sb->ent = e; | |
530 | } | |
531 | if (e->next) | |
532 | e->next->prev = e; | |
533 | } | |
534 | ||
1732a1fd JH |
535 | /* |
536 | * src typically is on-stack; we want to copy the information in it to | |
790296fd | 537 | * a malloced blame_entry that is already on the linked list of the |
1732a1fd JH |
538 | * scoreboard. The origin of dst loses a refcnt while the origin of src |
539 | * gains one. | |
540 | */ | |
cee7f245 JH |
541 | static void dup_entry(struct blame_entry *dst, struct blame_entry *src) |
542 | { | |
543 | struct blame_entry *p, *n; | |
54a4c617 | 544 | |
cee7f245 JH |
545 | p = dst->prev; |
546 | n = dst->next; | |
54a4c617 JH |
547 | origin_incref(src->suspect); |
548 | origin_decref(dst->suspect); | |
cee7f245 JH |
549 | memcpy(dst, src, sizeof(*src)); |
550 | dst->prev = p; | |
551 | dst->next = n; | |
5ff62c30 | 552 | dst->score = 0; |
cee7f245 JH |
553 | } |
554 | ||
555 | static const char *nth_line(struct scoreboard *sb, int lno) | |
556 | { | |
557 | return sb->final_buf + sb->lineno[lno]; | |
558 | } | |
559 | ||
1732a1fd JH |
560 | /* |
561 | * It is known that lines between tlno to same came from parent, and e | |
562 | * has an overlap with that range. it also is known that parent's | |
563 | * line plno corresponds to e's line tlno. | |
564 | * | |
565 | * <---- e -----> | |
566 | * <------> | |
567 | * <------------> | |
568 | * <------------> | |
569 | * <------------------> | |
570 | * | |
571 | * Split e into potentially three parts; before this chunk, the chunk | |
572 | * to be blamed for the parent, and after that portion. | |
573 | */ | |
54a4c617 | 574 | static void split_overlap(struct blame_entry *split, |
cee7f245 JH |
575 | struct blame_entry *e, |
576 | int tlno, int plno, int same, | |
577 | struct origin *parent) | |
578 | { | |
cee7f245 JH |
579 | int chunk_end_lno; |
580 | memset(split, 0, sizeof(struct blame_entry [3])); | |
581 | ||
582 | if (e->s_lno < tlno) { | |
583 | /* there is a pre-chunk part not blamed on parent */ | |
54a4c617 | 584 | split[0].suspect = origin_incref(e->suspect); |
cee7f245 JH |
585 | split[0].lno = e->lno; |
586 | split[0].s_lno = e->s_lno; | |
587 | split[0].num_lines = tlno - e->s_lno; | |
588 | split[1].lno = e->lno + tlno - e->s_lno; | |
589 | split[1].s_lno = plno; | |
590 | } | |
591 | else { | |
592 | split[1].lno = e->lno; | |
593 | split[1].s_lno = plno + (e->s_lno - tlno); | |
594 | } | |
595 | ||
596 | if (same < e->s_lno + e->num_lines) { | |
597 | /* there is a post-chunk part not blamed on parent */ | |
54a4c617 | 598 | split[2].suspect = origin_incref(e->suspect); |
cee7f245 JH |
599 | split[2].lno = e->lno + (same - e->s_lno); |
600 | split[2].s_lno = e->s_lno + (same - e->s_lno); | |
601 | split[2].num_lines = e->s_lno + e->num_lines - same; | |
602 | chunk_end_lno = split[2].lno; | |
603 | } | |
604 | else | |
605 | chunk_end_lno = e->lno + e->num_lines; | |
606 | split[1].num_lines = chunk_end_lno - split[1].lno; | |
607 | ||
1732a1fd JH |
608 | /* |
609 | * if it turns out there is nothing to blame the parent for, | |
610 | * forget about the splitting. !split[1].suspect signals this. | |
611 | */ | |
cee7f245 JH |
612 | if (split[1].num_lines < 1) |
613 | return; | |
54a4c617 | 614 | split[1].suspect = origin_incref(parent); |
cee7f245 JH |
615 | } |
616 | ||
1732a1fd JH |
617 | /* |
618 | * split_overlap() divided an existing blame e into up to three parts | |
619 | * in split. Adjust the linked list of blames in the scoreboard to | |
620 | * reflect the split. | |
621 | */ | |
cee7f245 | 622 | static void split_blame(struct scoreboard *sb, |
54a4c617 | 623 | struct blame_entry *split, |
cee7f245 JH |
624 | struct blame_entry *e) |
625 | { | |
626 | struct blame_entry *new_entry; | |
627 | ||
628 | if (split[0].suspect && split[2].suspect) { | |
1732a1fd | 629 | /* The first part (reuse storage for the existing entry e) */ |
cee7f245 JH |
630 | dup_entry(e, &split[0]); |
631 | ||
1732a1fd | 632 | /* The last part -- me */ |
cee7f245 JH |
633 | new_entry = xmalloc(sizeof(*new_entry)); |
634 | memcpy(new_entry, &(split[2]), sizeof(struct blame_entry)); | |
635 | add_blame_entry(sb, new_entry); | |
636 | ||
1732a1fd | 637 | /* ... and the middle part -- parent */ |
cee7f245 JH |
638 | new_entry = xmalloc(sizeof(*new_entry)); |
639 | memcpy(new_entry, &(split[1]), sizeof(struct blame_entry)); | |
640 | add_blame_entry(sb, new_entry); | |
641 | } | |
642 | else if (!split[0].suspect && !split[2].suspect) | |
1732a1fd JH |
643 | /* |
644 | * The parent covers the entire area; reuse storage for | |
645 | * e and replace it with the parent. | |
646 | */ | |
cee7f245 JH |
647 | dup_entry(e, &split[1]); |
648 | else if (split[0].suspect) { | |
1732a1fd | 649 | /* me and then parent */ |
cee7f245 JH |
650 | dup_entry(e, &split[0]); |
651 | ||
652 | new_entry = xmalloc(sizeof(*new_entry)); | |
653 | memcpy(new_entry, &(split[1]), sizeof(struct blame_entry)); | |
654 | add_blame_entry(sb, new_entry); | |
655 | } | |
656 | else { | |
1732a1fd | 657 | /* parent and then me */ |
cee7f245 JH |
658 | dup_entry(e, &split[1]); |
659 | ||
660 | new_entry = xmalloc(sizeof(*new_entry)); | |
661 | memcpy(new_entry, &(split[2]), sizeof(struct blame_entry)); | |
662 | add_blame_entry(sb, new_entry); | |
663 | } | |
664 | ||
54a4c617 | 665 | if (DEBUG) { /* sanity */ |
cee7f245 | 666 | struct blame_entry *ent; |
612702e8 | 667 | int lno = sb->ent->lno, corrupt = 0; |
cee7f245 JH |
668 | |
669 | for (ent = sb->ent; ent; ent = ent->next) { | |
670 | if (lno != ent->lno) | |
671 | corrupt = 1; | |
672 | if (ent->s_lno < 0) | |
673 | corrupt = 1; | |
674 | lno += ent->num_lines; | |
675 | } | |
676 | if (corrupt) { | |
612702e8 | 677 | lno = sb->ent->lno; |
cee7f245 JH |
678 | for (ent = sb->ent; ent; ent = ent->next) { |
679 | printf("L %8d l %8d n %8d\n", | |
680 | lno, ent->lno, ent->num_lines); | |
681 | lno = ent->lno + ent->num_lines; | |
682 | } | |
683 | die("oops"); | |
684 | } | |
685 | } | |
686 | } | |
687 | ||
1732a1fd JH |
688 | /* |
689 | * After splitting the blame, the origins used by the | |
690 | * on-stack blame_entry should lose one refcnt each. | |
691 | */ | |
54a4c617 JH |
692 | static void decref_split(struct blame_entry *split) |
693 | { | |
694 | int i; | |
695 | ||
696 | for (i = 0; i < 3; i++) | |
697 | origin_decref(split[i].suspect); | |
698 | } | |
699 | ||
1732a1fd JH |
700 | /* |
701 | * Helper for blame_chunk(). blame_entry e is known to overlap with | |
702 | * the patch hunk; split it and pass blame to the parent. | |
703 | */ | |
cee7f245 JH |
704 | static void blame_overlap(struct scoreboard *sb, struct blame_entry *e, |
705 | int tlno, int plno, int same, | |
706 | struct origin *parent) | |
707 | { | |
708 | struct blame_entry split[3]; | |
709 | ||
710 | split_overlap(split, e, tlno, plno, same, parent); | |
54a4c617 JH |
711 | if (split[1].suspect) |
712 | split_blame(sb, split, e); | |
713 | decref_split(split); | |
cee7f245 JH |
714 | } |
715 | ||
1732a1fd JH |
716 | /* |
717 | * Find the line number of the last line the target is suspected for. | |
718 | */ | |
cee7f245 JH |
719 | static int find_last_in_target(struct scoreboard *sb, struct origin *target) |
720 | { | |
721 | struct blame_entry *e; | |
722 | int last_in_target = -1; | |
723 | ||
724 | for (e = sb->ent; e; e = e->next) { | |
171dccd5 | 725 | if (e->guilty || !same_suspect(e->suspect, target)) |
cee7f245 JH |
726 | continue; |
727 | if (last_in_target < e->s_lno + e->num_lines) | |
728 | last_in_target = e->s_lno + e->num_lines; | |
729 | } | |
730 | return last_in_target; | |
731 | } | |
732 | ||
1732a1fd JH |
733 | /* |
734 | * Process one hunk from the patch between the current suspect for | |
735 | * blame_entry e and its parent. Find and split the overlap, and | |
736 | * pass blame to the overlapping part to the parent. | |
737 | */ | |
cee7f245 JH |
738 | static void blame_chunk(struct scoreboard *sb, |
739 | int tlno, int plno, int same, | |
740 | struct origin *target, struct origin *parent) | |
741 | { | |
612702e8 | 742 | struct blame_entry *e; |
cee7f245 | 743 | |
612702e8 | 744 | for (e = sb->ent; e; e = e->next) { |
171dccd5 | 745 | if (e->guilty || !same_suspect(e->suspect, target)) |
cee7f245 JH |
746 | continue; |
747 | if (same <= e->s_lno) | |
748 | continue; | |
749 | if (tlno < e->s_lno + e->num_lines) | |
750 | blame_overlap(sb, e, tlno, plno, same, parent); | |
751 | } | |
752 | } | |
753 | ||
cdcab133 RS |
754 | struct blame_chunk_cb_data { |
755 | struct scoreboard *sb; | |
756 | struct origin *target; | |
757 | struct origin *parent; | |
758 | long plno; | |
759 | long tlno; | |
760 | }; | |
761 | ||
762 | static void blame_chunk_cb(void *data, long same, long p_next, long t_next) | |
763 | { | |
764 | struct blame_chunk_cb_data *d = data; | |
765 | blame_chunk(d->sb, d->tlno, d->plno, same, d->target, d->parent); | |
766 | d->plno = p_next; | |
767 | d->tlno = t_next; | |
768 | } | |
769 | ||
1732a1fd JH |
770 | /* |
771 | * We are looking at the origin 'target' and aiming to pass blame | |
772 | * for the lines it is suspected to its parent. Run diff to find | |
773 | * which lines came from parent and pass blame for them. | |
774 | */ | |
cee7f245 JH |
775 | static int pass_blame_to_parent(struct scoreboard *sb, |
776 | struct origin *target, | |
777 | struct origin *parent) | |
778 | { | |
cdcab133 | 779 | int last_in_target; |
7c4ed8c8 | 780 | mmfile_t file_p, file_o; |
66dbfd55 | 781 | struct blame_chunk_cb_data d; |
cdcab133 RS |
782 | xpparam_t xpp; |
783 | xdemitconf_t xecfg; | |
66dbfd55 GV |
784 | memset(&d, 0, sizeof(d)); |
785 | d.sb = sb; d.target = target; d.parent = parent; | |
cee7f245 JH |
786 | last_in_target = find_last_in_target(sb, target); |
787 | if (last_in_target < 0) | |
788 | return 1; /* nothing remains for this target */ | |
789 | ||
3b8a12e8 AB |
790 | fill_origin_blob(&sb->revs->diffopt, parent, &file_p); |
791 | fill_origin_blob(&sb->revs->diffopt, target, &file_o); | |
7c4ed8c8 | 792 | num_get_patch++; |
cee7f245 | 793 | |
cdcab133 RS |
794 | memset(&xpp, 0, sizeof(xpp)); |
795 | xpp.flags = xdl_opts; | |
796 | memset(&xecfg, 0, sizeof(xecfg)); | |
797 | xecfg.ctxlen = 0; | |
798 | xdi_diff_hunks(&file_p, &file_o, blame_chunk_cb, &d, &xpp, &xecfg); | |
1732a1fd | 799 | /* The rest (i.e. anything after tlno) are the same as the parent */ |
cdcab133 | 800 | blame_chunk(sb, d.tlno, d.plno, last_in_target, target, parent); |
cee7f245 | 801 | |
cee7f245 JH |
802 | return 0; |
803 | } | |
804 | ||
1732a1fd JH |
805 | /* |
806 | * The lines in blame_entry after splitting blames many times can become | |
807 | * very small and trivial, and at some point it becomes pointless to | |
808 | * blame the parents. E.g. "\t\t}\n\t}\n\n" appears everywhere in any | |
809 | * ordinary C program, and it is not worth to say it was copied from | |
810 | * totally unrelated file in the parent. | |
811 | * | |
812 | * Compute how trivial the lines in the blame_entry are. | |
813 | */ | |
5ff62c30 JH |
814 | static unsigned ent_score(struct scoreboard *sb, struct blame_entry *e) |
815 | { | |
816 | unsigned score; | |
817 | const char *cp, *ep; | |
818 | ||
819 | if (e->score) | |
820 | return e->score; | |
821 | ||
612702e8 | 822 | score = 1; |
5ff62c30 JH |
823 | cp = nth_line(sb, e->lno); |
824 | ep = nth_line(sb, e->lno + e->num_lines); | |
825 | while (cp < ep) { | |
826 | unsigned ch = *((unsigned char *)cp); | |
827 | if (isalnum(ch)) | |
828 | score++; | |
829 | cp++; | |
830 | } | |
831 | e->score = score; | |
832 | return score; | |
833 | } | |
834 | ||
1732a1fd JH |
835 | /* |
836 | * best_so_far[] and this[] are both a split of an existing blame_entry | |
837 | * that passes blame to the parent. Maintain best_so_far the best split | |
838 | * so far, by comparing this and best_so_far and copying this into | |
839 | * bst_so_far as needed. | |
840 | */ | |
5ff62c30 | 841 | static void copy_split_if_better(struct scoreboard *sb, |
54a4c617 JH |
842 | struct blame_entry *best_so_far, |
843 | struct blame_entry *this) | |
d24bba80 | 844 | { |
54a4c617 JH |
845 | int i; |
846 | ||
d24bba80 JH |
847 | if (!this[1].suspect) |
848 | return; | |
5ff62c30 JH |
849 | if (best_so_far[1].suspect) { |
850 | if (ent_score(sb, &this[1]) < ent_score(sb, &best_so_far[1])) | |
851 | return; | |
852 | } | |
54a4c617 JH |
853 | |
854 | for (i = 0; i < 3; i++) | |
855 | origin_incref(this[i].suspect); | |
856 | decref_split(best_so_far); | |
d24bba80 JH |
857 | memcpy(best_so_far, this, sizeof(struct blame_entry [3])); |
858 | } | |
859 | ||
dd166aa8 JH |
860 | /* |
861 | * We are looking at a part of the final image represented by | |
862 | * ent (tlno and same are offset by ent->s_lno). | |
863 | * tlno is where we are looking at in the final image. | |
864 | * up to (but not including) same match preimage. | |
865 | * plno is where we are looking at in the preimage. | |
866 | * | |
867 | * <-------------- final image ----------------------> | |
868 | * <------ent------> | |
869 | * ^tlno ^same | |
870 | * <---------preimage-----> | |
871 | * ^plno | |
872 | * | |
873 | * All line numbers are 0-based. | |
874 | */ | |
875 | static void handle_split(struct scoreboard *sb, | |
876 | struct blame_entry *ent, | |
877 | int tlno, int plno, int same, | |
878 | struct origin *parent, | |
879 | struct blame_entry *split) | |
880 | { | |
881 | if (ent->num_lines <= tlno) | |
882 | return; | |
883 | if (tlno < same) { | |
884 | struct blame_entry this[3]; | |
885 | tlno += ent->s_lno; | |
886 | same += ent->s_lno; | |
887 | split_overlap(this, ent, tlno, plno, same, parent); | |
888 | copy_split_if_better(sb, split, this); | |
889 | decref_split(this); | |
890 | } | |
891 | } | |
892 | ||
cdcab133 RS |
893 | struct handle_split_cb_data { |
894 | struct scoreboard *sb; | |
895 | struct blame_entry *ent; | |
896 | struct origin *parent; | |
897 | struct blame_entry *split; | |
898 | long plno; | |
899 | long tlno; | |
900 | }; | |
901 | ||
902 | static void handle_split_cb(void *data, long same, long p_next, long t_next) | |
903 | { | |
904 | struct handle_split_cb_data *d = data; | |
905 | handle_split(d->sb, d->ent, d->tlno, d->plno, same, d->parent, d->split); | |
906 | d->plno = p_next; | |
907 | d->tlno = t_next; | |
908 | } | |
909 | ||
1732a1fd JH |
910 | /* |
911 | * Find the lines from parent that are the same as ent so that | |
912 | * we can pass blames to it. file_p has the blob contents for | |
913 | * the parent. | |
914 | */ | |
d24bba80 JH |
915 | static void find_copy_in_blob(struct scoreboard *sb, |
916 | struct blame_entry *ent, | |
917 | struct origin *parent, | |
54a4c617 | 918 | struct blame_entry *split, |
d24bba80 JH |
919 | mmfile_t *file_p) |
920 | { | |
921 | const char *cp; | |
922 | int cnt; | |
923 | mmfile_t file_o; | |
66dbfd55 | 924 | struct handle_split_cb_data d; |
cdcab133 RS |
925 | xpparam_t xpp; |
926 | xdemitconf_t xecfg; | |
66dbfd55 GV |
927 | memset(&d, 0, sizeof(d)); |
928 | d.sb = sb; d.ent = ent; d.parent = parent; d.split = split; | |
1732a1fd JH |
929 | /* |
930 | * Prepare mmfile that contains only the lines in ent. | |
931 | */ | |
d24bba80 | 932 | cp = nth_line(sb, ent->lno); |
4b25d091 | 933 | file_o.ptr = (char *) cp; |
d24bba80 JH |
934 | cnt = ent->num_lines; |
935 | ||
936 | while (cnt && cp < sb->final_buf + sb->final_buf_size) { | |
937 | if (*cp++ == '\n') | |
938 | cnt--; | |
939 | } | |
940 | file_o.size = cp - file_o.ptr; | |
941 | ||
dd166aa8 JH |
942 | /* |
943 | * file_o is a part of final image we are annotating. | |
944 | * file_p partially may match that image. | |
945 | */ | |
cdcab133 RS |
946 | memset(&xpp, 0, sizeof(xpp)); |
947 | xpp.flags = xdl_opts; | |
948 | memset(&xecfg, 0, sizeof(xecfg)); | |
949 | xecfg.ctxlen = 1; | |
d24bba80 | 950 | memset(split, 0, sizeof(struct blame_entry [3])); |
cdcab133 | 951 | xdi_diff_hunks(file_p, &file_o, handle_split_cb, &d, &xpp, &xecfg); |
dd166aa8 | 952 | /* remainder, if any, all match the preimage */ |
cdcab133 | 953 | handle_split(sb, ent, d.tlno, d.plno, ent->num_lines, parent, split); |
d24bba80 JH |
954 | } |
955 | ||
1732a1fd JH |
956 | /* |
957 | * See if lines currently target is suspected for can be attributed to | |
958 | * parent. | |
959 | */ | |
d24bba80 JH |
960 | static int find_move_in_parent(struct scoreboard *sb, |
961 | struct origin *target, | |
962 | struct origin *parent) | |
963 | { | |
650e2f67 | 964 | int last_in_target, made_progress; |
46014766 | 965 | struct blame_entry *e, split[3]; |
d24bba80 | 966 | mmfile_t file_p; |
d24bba80 JH |
967 | |
968 | last_in_target = find_last_in_target(sb, target); | |
969 | if (last_in_target < 0) | |
970 | return 1; /* nothing remains for this target */ | |
971 | ||
3b8a12e8 | 972 | fill_origin_blob(&sb->revs->diffopt, parent, &file_p); |
c2e525d9 | 973 | if (!file_p.ptr) |
d24bba80 | 974 | return 0; |
d24bba80 | 975 | |
650e2f67 JH |
976 | made_progress = 1; |
977 | while (made_progress) { | |
978 | made_progress = 0; | |
979 | for (e = sb->ent; e; e = e->next) { | |
1617fe98 AG |
980 | if (e->guilty || !same_suspect(e->suspect, target) || |
981 | ent_score(sb, e) < blame_move_score) | |
650e2f67 JH |
982 | continue; |
983 | find_copy_in_blob(sb, e, parent, split, &file_p); | |
984 | if (split[1].suspect && | |
985 | blame_move_score < ent_score(sb, &split[1])) { | |
986 | split_blame(sb, split, e); | |
987 | made_progress = 1; | |
988 | } | |
989 | decref_split(split); | |
990 | } | |
d24bba80 | 991 | } |
d24bba80 JH |
992 | return 0; |
993 | } | |
994 | ||
33494784 JH |
995 | struct blame_list { |
996 | struct blame_entry *ent; | |
997 | struct blame_entry split[3]; | |
998 | }; | |
999 | ||
1732a1fd JH |
1000 | /* |
1001 | * Count the number of entries the target is suspected for, | |
1002 | * and prepare a list of entry and the best split. | |
1003 | */ | |
33494784 JH |
1004 | static struct blame_list *setup_blame_list(struct scoreboard *sb, |
1005 | struct origin *target, | |
1617fe98 | 1006 | int min_score, |
33494784 JH |
1007 | int *num_ents_p) |
1008 | { | |
1009 | struct blame_entry *e; | |
1010 | int num_ents, i; | |
1011 | struct blame_list *blame_list = NULL; | |
1012 | ||
33494784 | 1013 | for (e = sb->ent, num_ents = 0; e; e = e->next) |
1617fe98 AG |
1014 | if (!e->scanned && !e->guilty && |
1015 | same_suspect(e->suspect, target) && | |
1016 | min_score < ent_score(sb, e)) | |
33494784 JH |
1017 | num_ents++; |
1018 | if (num_ents) { | |
1019 | blame_list = xcalloc(num_ents, sizeof(struct blame_list)); | |
1020 | for (e = sb->ent, i = 0; e; e = e->next) | |
1617fe98 AG |
1021 | if (!e->scanned && !e->guilty && |
1022 | same_suspect(e->suspect, target) && | |
1023 | min_score < ent_score(sb, e)) | |
33494784 JH |
1024 | blame_list[i++].ent = e; |
1025 | } | |
1026 | *num_ents_p = num_ents; | |
1027 | return blame_list; | |
1028 | } | |
1029 | ||
eb46328e AG |
1030 | /* |
1031 | * Reset the scanned status on all entries. | |
1032 | */ | |
1033 | static void reset_scanned_flag(struct scoreboard *sb) | |
1034 | { | |
1035 | struct blame_entry *e; | |
1036 | for (e = sb->ent; e; e = e->next) | |
1037 | e->scanned = 0; | |
1038 | } | |
1039 | ||
1732a1fd JH |
1040 | /* |
1041 | * For lines target is suspected for, see if we can find code movement | |
1042 | * across file boundary from the parent commit. porigin is the path | |
1043 | * in the parent we already tried. | |
1044 | */ | |
18abd745 JH |
1045 | static int find_copy_in_parent(struct scoreboard *sb, |
1046 | struct origin *target, | |
1047 | struct commit *parent, | |
1048 | struct origin *porigin, | |
1049 | int opt) | |
1050 | { | |
1051 | struct diff_options diff_opts; | |
1052 | const char *paths[1]; | |
aec8fa1f | 1053 | int i, j; |
33494784 JH |
1054 | int retval; |
1055 | struct blame_list *blame_list; | |
aec8fa1f | 1056 | int num_ents; |
18abd745 | 1057 | |
1617fe98 | 1058 | blame_list = setup_blame_list(sb, target, blame_copy_score, &num_ents); |
33494784 | 1059 | if (!blame_list) |
18abd745 JH |
1060 | return 1; /* nothing remains for this target */ |
1061 | ||
1062 | diff_setup(&diff_opts); | |
8f67f8ae | 1063 | DIFF_OPT_SET(&diff_opts, RECURSIVE); |
18abd745 JH |
1064 | diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT; |
1065 | ||
18abd745 JH |
1066 | paths[0] = NULL; |
1067 | diff_tree_setup_paths(paths, &diff_opts); | |
1068 | if (diff_setup_done(&diff_opts) < 0) | |
1069 | die("diff-setup"); | |
33494784 JH |
1070 | |
1071 | /* Try "find copies harder" on new path if requested; | |
1072 | * we do not want to use diffcore_rename() actually to | |
1073 | * match things up; find_copies_harder is set only to | |
1074 | * force diff_tree_sha1() to feed all filepairs to diff_queue, | |
1075 | * and this code needs to be after diff_setup_done(), which | |
1076 | * usually makes find-copies-harder imply copy detection. | |
1077 | */ | |
c63777c0 JH |
1078 | if ((opt & PICKAXE_BLAME_COPY_HARDEST) |
1079 | || ((opt & PICKAXE_BLAME_COPY_HARDER) | |
1080 | && (!porigin || strcmp(target->path, porigin->path)))) | |
8f67f8ae | 1081 | DIFF_OPT_SET(&diff_opts, FIND_COPIES_HARDER); |
33494784 | 1082 | |
1cfe7733 JH |
1083 | if (is_null_sha1(target->commit->object.sha1)) |
1084 | do_diff_cache(parent->tree->object.sha1, &diff_opts); | |
1085 | else | |
1086 | diff_tree_sha1(parent->tree->object.sha1, | |
1087 | target->commit->tree->object.sha1, | |
1088 | "", &diff_opts); | |
18abd745 | 1089 | |
8f67f8ae | 1090 | if (!DIFF_OPT_TST(&diff_opts, FIND_COPIES_HARDER)) |
33494784 | 1091 | diffcore_std(&diff_opts); |
18abd745 | 1092 | |
33494784 JH |
1093 | retval = 0; |
1094 | while (1) { | |
1095 | int made_progress = 0; | |
1096 | ||
1097 | for (i = 0; i < diff_queued_diff.nr; i++) { | |
1098 | struct diff_filepair *p = diff_queued_diff.queue[i]; | |
1099 | struct origin *norigin; | |
1100 | mmfile_t file_p; | |
33494784 JH |
1101 | struct blame_entry this[3]; |
1102 | ||
1103 | if (!DIFF_FILE_VALID(p->one)) | |
1104 | continue; /* does not exist in parent */ | |
5209ac4d AG |
1105 | if (S_ISGITLINK(p->one->mode)) |
1106 | continue; /* ignore git links */ | |
33494784 JH |
1107 | if (porigin && !strcmp(p->one->path, porigin->path)) |
1108 | /* find_move already dealt with this path */ | |
1109 | continue; | |
1110 | ||
1111 | norigin = get_origin(sb, parent, p->one->path); | |
1112 | hashcpy(norigin->blob_sha1, p->one->sha1); | |
90064710 | 1113 | norigin->mode = p->one->mode; |
3b8a12e8 | 1114 | fill_origin_blob(&sb->revs->diffopt, norigin, &file_p); |
33494784 JH |
1115 | if (!file_p.ptr) |
1116 | continue; | |
1117 | ||
1118 | for (j = 0; j < num_ents; j++) { | |
1119 | find_copy_in_blob(sb, blame_list[j].ent, | |
1120 | norigin, this, &file_p); | |
1121 | copy_split_if_better(sb, blame_list[j].split, | |
1122 | this); | |
1123 | decref_split(this); | |
1124 | } | |
33494784 JH |
1125 | origin_decref(norigin); |
1126 | } | |
18abd745 | 1127 | |
aec8fa1f | 1128 | for (j = 0; j < num_ents; j++) { |
33494784 JH |
1129 | struct blame_entry *split = blame_list[j].split; |
1130 | if (split[1].suspect && | |
1131 | blame_copy_score < ent_score(sb, &split[1])) { | |
1132 | split_blame(sb, split, blame_list[j].ent); | |
1133 | made_progress = 1; | |
1134 | } | |
eb46328e AG |
1135 | else |
1136 | blame_list[j].ent->scanned = 1; | |
33494784 | 1137 | decref_split(split); |
18abd745 | 1138 | } |
33494784 | 1139 | free(blame_list); |
aec8fa1f | 1140 | |
33494784 JH |
1141 | if (!made_progress) |
1142 | break; | |
1617fe98 | 1143 | blame_list = setup_blame_list(sb, target, blame_copy_score, &num_ents); |
33494784 JH |
1144 | if (!blame_list) { |
1145 | retval = 1; | |
1146 | break; | |
1147 | } | |
18abd745 | 1148 | } |
eb46328e | 1149 | reset_scanned_flag(sb); |
33494784 | 1150 | diff_flush(&diff_opts); |
03b69c76 | 1151 | diff_tree_release_paths(&diff_opts); |
33494784 | 1152 | return retval; |
18abd745 JH |
1153 | } |
1154 | ||
1732a1fd JH |
1155 | /* |
1156 | * The blobs of origin and porigin exactly match, so everything | |
c2e525d9 JH |
1157 | * origin is suspected for can be blamed on the parent. |
1158 | */ | |
1159 | static void pass_whole_blame(struct scoreboard *sb, | |
1160 | struct origin *origin, struct origin *porigin) | |
1161 | { | |
1162 | struct blame_entry *e; | |
1163 | ||
1164 | if (!porigin->file.ptr && origin->file.ptr) { | |
1165 | /* Steal its file */ | |
1166 | porigin->file = origin->file; | |
1167 | origin->file.ptr = NULL; | |
1168 | } | |
1169 | for (e = sb->ent; e; e = e->next) { | |
171dccd5 | 1170 | if (!same_suspect(e->suspect, origin)) |
c2e525d9 JH |
1171 | continue; |
1172 | origin_incref(porigin); | |
1173 | origin_decref(e->suspect); | |
1174 | e->suspect = porigin; | |
1175 | } | |
1176 | } | |
1177 | ||
69264f46 JH |
1178 | /* |
1179 | * We pass blame from the current commit to its parents. We keep saying | |
1180 | * "parent" (and "porigin"), but what we mean is to find scapegoat to | |
1181 | * exonerate ourselves. | |
1182 | */ | |
85af7929 | 1183 | static struct commit_list *first_scapegoat(struct rev_info *revs, struct commit *commit) |
69264f46 | 1184 | { |
85af7929 JH |
1185 | if (!reverse) |
1186 | return commit->parents; | |
1187 | return lookup_decoration(&revs->children, &commit->object); | |
69264f46 JH |
1188 | } |
1189 | ||
85af7929 | 1190 | static int num_scapegoats(struct rev_info *revs, struct commit *commit) |
69264f46 JH |
1191 | { |
1192 | int cnt; | |
85af7929 | 1193 | struct commit_list *l = first_scapegoat(revs, commit); |
69264f46 JH |
1194 | for (cnt = 0; l; l = l->next) |
1195 | cnt++; | |
1196 | return cnt; | |
1197 | } | |
1198 | ||
1199 | #define MAXSG 16 | |
cee7f245 | 1200 | |
d24bba80 | 1201 | static void pass_blame(struct scoreboard *sb, struct origin *origin, int opt) |
cee7f245 | 1202 | { |
85af7929 | 1203 | struct rev_info *revs = sb->revs; |
69264f46 | 1204 | int i, pass, num_sg; |
cee7f245 | 1205 | struct commit *commit = origin->commit; |
69264f46 JH |
1206 | struct commit_list *sg; |
1207 | struct origin *sg_buf[MAXSG]; | |
1208 | struct origin *porigin, **sg_origin = sg_buf; | |
1209 | ||
85af7929 | 1210 | num_sg = num_scapegoats(revs, commit); |
69264f46 JH |
1211 | if (!num_sg) |
1212 | goto finish; | |
1213 | else if (num_sg < ARRAY_SIZE(sg_buf)) | |
1214 | memset(sg_buf, 0, sizeof(sg_buf)); | |
1215 | else | |
1216 | sg_origin = xcalloc(num_sg, sizeof(*sg_origin)); | |
cee7f245 | 1217 | |
69264f46 JH |
1218 | /* |
1219 | * The first pass looks for unrenamed path to optimize for | |
f69e743d JH |
1220 | * common cases, then we look for renames in the second pass. |
1221 | */ | |
1222 | for (pass = 0; pass < 2; pass++) { | |
1223 | struct origin *(*find)(struct scoreboard *, | |
1224 | struct commit *, struct origin *); | |
1225 | find = pass ? find_rename : find_origin; | |
1226 | ||
85af7929 | 1227 | for (i = 0, sg = first_scapegoat(revs, commit); |
69264f46 JH |
1228 | i < num_sg && sg; |
1229 | sg = sg->next, i++) { | |
1230 | struct commit *p = sg->item; | |
0421d9f8 | 1231 | int j, same; |
f69e743d | 1232 | |
69264f46 | 1233 | if (sg_origin[i]) |
f69e743d JH |
1234 | continue; |
1235 | if (parse_commit(p)) | |
1236 | continue; | |
0d981c67 | 1237 | porigin = find(sb, p, origin); |
f69e743d JH |
1238 | if (!porigin) |
1239 | continue; | |
1240 | if (!hashcmp(porigin->blob_sha1, origin->blob_sha1)) { | |
c2e525d9 | 1241 | pass_whole_blame(sb, origin, porigin); |
f69e743d JH |
1242 | origin_decref(porigin); |
1243 | goto finish; | |
1244 | } | |
0421d9f8 | 1245 | for (j = same = 0; j < i; j++) |
69264f46 JH |
1246 | if (sg_origin[j] && |
1247 | !hashcmp(sg_origin[j]->blob_sha1, | |
0421d9f8 JH |
1248 | porigin->blob_sha1)) { |
1249 | same = 1; | |
1250 | break; | |
1251 | } | |
1252 | if (!same) | |
69264f46 | 1253 | sg_origin[i] = porigin; |
0421d9f8 JH |
1254 | else |
1255 | origin_decref(porigin); | |
cee7f245 | 1256 | } |
cee7f245 JH |
1257 | } |
1258 | ||
c2e525d9 | 1259 | num_commits++; |
85af7929 | 1260 | for (i = 0, sg = first_scapegoat(revs, commit); |
69264f46 JH |
1261 | i < num_sg && sg; |
1262 | sg = sg->next, i++) { | |
1263 | struct origin *porigin = sg_origin[i]; | |
cee7f245 JH |
1264 | if (!porigin) |
1265 | continue; | |
96e11709 JH |
1266 | if (!origin->previous) { |
1267 | origin_incref(porigin); | |
1268 | origin->previous = porigin; | |
1269 | } | |
cee7f245 | 1270 | if (pass_blame_to_parent(sb, origin, porigin)) |
54a4c617 | 1271 | goto finish; |
cee7f245 | 1272 | } |
d24bba80 JH |
1273 | |
1274 | /* | |
1732a1fd | 1275 | * Optionally find moves in parents' files. |
d24bba80 JH |
1276 | */ |
1277 | if (opt & PICKAXE_BLAME_MOVE) | |
85af7929 | 1278 | for (i = 0, sg = first_scapegoat(revs, commit); |
69264f46 JH |
1279 | i < num_sg && sg; |
1280 | sg = sg->next, i++) { | |
1281 | struct origin *porigin = sg_origin[i]; | |
d24bba80 JH |
1282 | if (!porigin) |
1283 | continue; | |
1284 | if (find_move_in_parent(sb, origin, porigin)) | |
54a4c617 | 1285 | goto finish; |
d24bba80 JH |
1286 | } |
1287 | ||
18abd745 | 1288 | /* |
1732a1fd | 1289 | * Optionally find copies from parents' files. |
18abd745 JH |
1290 | */ |
1291 | if (opt & PICKAXE_BLAME_COPY) | |
85af7929 | 1292 | for (i = 0, sg = first_scapegoat(revs, commit); |
69264f46 JH |
1293 | i < num_sg && sg; |
1294 | sg = sg->next, i++) { | |
1295 | struct origin *porigin = sg_origin[i]; | |
1296 | if (find_copy_in_parent(sb, origin, sg->item, | |
18abd745 | 1297 | porigin, opt)) |
54a4c617 | 1298 | goto finish; |
18abd745 | 1299 | } |
54a4c617 JH |
1300 | |
1301 | finish: | |
69264f46 JH |
1302 | for (i = 0; i < num_sg; i++) { |
1303 | if (sg_origin[i]) { | |
1304 | drop_origin_blob(sg_origin[i]); | |
1305 | origin_decref(sg_origin[i]); | |
7c3c7962 JH |
1306 | } |
1307 | } | |
1308 | drop_origin_blob(origin); | |
69264f46 JH |
1309 | if (sg_buf != sg_origin) |
1310 | free(sg_origin); | |
cee7f245 JH |
1311 | } |
1312 | ||
1732a1fd JH |
1313 | /* |
1314 | * Information on commits, used for output. | |
1315 | */ | |
9cba13ca | 1316 | struct commit_info { |
3a55602e SP |
1317 | const char *author; |
1318 | const char *author_mail; | |
cee7f245 | 1319 | unsigned long author_time; |
3a55602e | 1320 | const char *author_tz; |
cee7f245 JH |
1321 | |
1322 | /* filled only when asked for details */ | |
3a55602e SP |
1323 | const char *committer; |
1324 | const char *committer_mail; | |
cee7f245 | 1325 | unsigned long committer_time; |
3a55602e | 1326 | const char *committer_tz; |
cee7f245 | 1327 | |
3a55602e | 1328 | const char *summary; |
cee7f245 JH |
1329 | }; |
1330 | ||
1732a1fd JH |
1331 | /* |
1332 | * Parse author/committer line in the commit object buffer | |
1333 | */ | |
cee7f245 | 1334 | static void get_ac_line(const char *inbuf, const char *what, |
d20d654f MSO |
1335 | int person_len, char *person, |
1336 | int mail_len, char *mail, | |
3a55602e | 1337 | unsigned long *time, const char **tz) |
cee7f245 | 1338 | { |
f9567384 | 1339 | int len, tzlen, maillen; |
d20d654f | 1340 | char *tmp, *endp, *timepos, *mailpos; |
cee7f245 JH |
1341 | |
1342 | tmp = strstr(inbuf, what); | |
1343 | if (!tmp) | |
1344 | goto error_out; | |
1345 | tmp += strlen(what); | |
1346 | endp = strchr(tmp, '\n'); | |
1347 | if (!endp) | |
1348 | len = strlen(tmp); | |
1349 | else | |
1350 | len = endp - tmp; | |
d20d654f | 1351 | if (person_len <= len) { |
cee7f245 JH |
1352 | error_out: |
1353 | /* Ugh */ | |
d20d654f | 1354 | *tz = "(unknown)"; |
c8cba791 | 1355 | strcpy(person, *tz); |
d20d654f | 1356 | strcpy(mail, *tz); |
cee7f245 JH |
1357 | *time = 0; |
1358 | return; | |
1359 | } | |
1360 | memcpy(person, tmp, len); | |
1361 | ||
1362 | tmp = person; | |
1363 | tmp += len; | |
1364 | *tmp = 0; | |
c8cba791 | 1365 | while (person < tmp && *tmp != ' ') |
cee7f245 | 1366 | tmp--; |
c8cba791 DR |
1367 | if (tmp <= person) |
1368 | goto error_out; | |
cee7f245 | 1369 | *tz = tmp+1; |
f9567384 | 1370 | tzlen = (person+len)-(tmp+1); |
cee7f245 JH |
1371 | |
1372 | *tmp = 0; | |
c8cba791 | 1373 | while (person < tmp && *tmp != ' ') |
cee7f245 | 1374 | tmp--; |
c8cba791 DR |
1375 | if (tmp <= person) |
1376 | goto error_out; | |
cee7f245 | 1377 | *time = strtoul(tmp, NULL, 10); |
f9567384 | 1378 | timepos = tmp; |
cee7f245 JH |
1379 | |
1380 | *tmp = 0; | |
9b01f003 | 1381 | while (person < tmp && !(*tmp == ' ' && tmp[1] == '<')) |
cee7f245 | 1382 | tmp--; |
c8cba791 DR |
1383 | if (tmp <= person) |
1384 | return; | |
d20d654f | 1385 | mailpos = tmp + 1; |
cee7f245 | 1386 | *tmp = 0; |
f9567384 | 1387 | maillen = timepos - tmp; |
d20d654f | 1388 | memcpy(mail, mailpos, maillen); |
f9567384 JH |
1389 | |
1390 | if (!mailmap.nr) | |
1391 | return; | |
1392 | ||
1393 | /* | |
1394 | * mailmap expansion may make the name longer. | |
1395 | * make room by pushing stuff down. | |
1396 | */ | |
d20d654f | 1397 | tmp = person + person_len - (tzlen + 1); |
f9567384 JH |
1398 | memmove(tmp, *tz, tzlen); |
1399 | tmp[tzlen] = 0; | |
1400 | *tz = tmp; | |
1401 | ||
f9567384 | 1402 | /* |
d20d654f | 1403 | * Now, convert both name and e-mail using mailmap |
f9567384 | 1404 | */ |
eeefa7c9 | 1405 | if (map_user(&mailmap, mail+1, mail_len-1, person, tmp-person-1)) { |
d20d654f MSO |
1406 | /* Add a trailing '>' to email, since map_user returns plain emails |
1407 | Note: It already has '<', since we replace from mail+1 */ | |
1408 | mailpos = memchr(mail, '\0', mail_len); | |
1409 | if (mailpos && mailpos-mail < mail_len - 1) { | |
1410 | *mailpos = '>'; | |
1411 | *(mailpos+1) = '\0'; | |
1412 | } | |
1413 | } | |
cee7f245 JH |
1414 | } |
1415 | ||
1416 | static void get_commit_info(struct commit *commit, | |
1417 | struct commit_info *ret, | |
1418 | int detailed) | |
1419 | { | |
1420 | int len; | |
ad98a58b CC |
1421 | const char *subject; |
1422 | char *reencoded, *message; | |
d20d654f MSO |
1423 | static char author_name[1024]; |
1424 | static char author_mail[1024]; | |
1425 | static char committer_name[1024]; | |
1426 | static char committer_mail[1024]; | |
cee7f245 JH |
1427 | static char summary_buf[1024]; |
1428 | ||
1732a1fd JH |
1429 | /* |
1430 | * We've operated without save_commit_buffer, so | |
612702e8 JH |
1431 | * we now need to populate them for output. |
1432 | */ | |
1433 | if (!commit->buffer) { | |
21666f1a | 1434 | enum object_type type; |
612702e8 JH |
1435 | unsigned long size; |
1436 | commit->buffer = | |
21666f1a | 1437 | read_sha1_file(commit->object.sha1, &type, &size); |
ab43e495 JH |
1438 | if (!commit->buffer) |
1439 | die("Cannot read commit %s", | |
1440 | sha1_to_hex(commit->object.sha1)); | |
612702e8 | 1441 | } |
69cd8f63 AG |
1442 | reencoded = reencode_commit_message(commit, NULL); |
1443 | message = reencoded ? reencoded : commit->buffer; | |
d20d654f MSO |
1444 | ret->author = author_name; |
1445 | ret->author_mail = author_mail; | |
69cd8f63 | 1446 | get_ac_line(message, "\nauthor ", |
d20d654f MSO |
1447 | sizeof(author_name), author_name, |
1448 | sizeof(author_mail), author_mail, | |
cee7f245 JH |
1449 | &ret->author_time, &ret->author_tz); |
1450 | ||
69cd8f63 AG |
1451 | if (!detailed) { |
1452 | free(reencoded); | |
cee7f245 | 1453 | return; |
69cd8f63 | 1454 | } |
cee7f245 | 1455 | |
d20d654f MSO |
1456 | ret->committer = committer_name; |
1457 | ret->committer_mail = committer_mail; | |
69cd8f63 | 1458 | get_ac_line(message, "\ncommitter ", |
d20d654f MSO |
1459 | sizeof(committer_name), committer_name, |
1460 | sizeof(committer_mail), committer_mail, | |
cee7f245 JH |
1461 | &ret->committer_time, &ret->committer_tz); |
1462 | ||
1463 | ret->summary = summary_buf; | |
ad98a58b CC |
1464 | len = find_commit_subject(message, &subject); |
1465 | if (len && len < sizeof(summary_buf)) { | |
1466 | memcpy(summary_buf, subject, len); | |
1467 | summary_buf[len] = 0; | |
1468 | } else { | |
cee7f245 | 1469 | sprintf(summary_buf, "(%s)", sha1_to_hex(commit->object.sha1)); |
cee7f245 | 1470 | } |
69cd8f63 | 1471 | free(reencoded); |
cee7f245 JH |
1472 | } |
1473 | ||
1732a1fd JH |
1474 | /* |
1475 | * To allow LF and other nonportable characters in pathnames, | |
1476 | * they are c-style quoted as needed. | |
1477 | */ | |
46e5e69d JH |
1478 | static void write_filename_info(const char *path) |
1479 | { | |
1480 | printf("filename "); | |
663af342 | 1481 | write_name_quoted(path, stdout, '\n'); |
46e5e69d JH |
1482 | } |
1483 | ||
9991030c JH |
1484 | /* |
1485 | * Porcelain/Incremental format wants to show a lot of details per | |
1486 | * commit. Instead of repeating this every line, emit it only once, | |
1487 | * the first time each commit appears in the output. | |
1488 | */ | |
1489 | static int emit_one_suspect_detail(struct origin *suspect) | |
1490 | { | |
1491 | struct commit_info ci; | |
1492 | ||
1493 | if (suspect->commit->object.flags & METAINFO_SHOWN) | |
1494 | return 0; | |
1495 | ||
1496 | suspect->commit->object.flags |= METAINFO_SHOWN; | |
1497 | get_commit_info(suspect->commit, &ci, 1); | |
1498 | printf("author %s\n", ci.author); | |
1499 | printf("author-mail %s\n", ci.author_mail); | |
1500 | printf("author-time %lu\n", ci.author_time); | |
1501 | printf("author-tz %s\n", ci.author_tz); | |
1502 | printf("committer %s\n", ci.committer); | |
1503 | printf("committer-mail %s\n", ci.committer_mail); | |
1504 | printf("committer-time %lu\n", ci.committer_time); | |
1505 | printf("committer-tz %s\n", ci.committer_tz); | |
1506 | printf("summary %s\n", ci.summary); | |
1507 | if (suspect->commit->object.flags & UNINTERESTING) | |
1508 | printf("boundary\n"); | |
96e11709 JH |
1509 | if (suspect->previous) { |
1510 | struct origin *prev = suspect->previous; | |
1511 | printf("previous %s ", sha1_to_hex(prev->commit->object.sha1)); | |
1512 | write_name_quoted(prev->path, stdout, '\n'); | |
1513 | } | |
9991030c JH |
1514 | return 1; |
1515 | } | |
1516 | ||
1732a1fd JH |
1517 | /* |
1518 | * The blame_entry is found to be guilty for the range. Mark it | |
1519 | * as such, and show it in incremental output. | |
1520 | */ | |
717d1462 LT |
1521 | static void found_guilty_entry(struct blame_entry *ent) |
1522 | { | |
1523 | if (ent->guilty) | |
1524 | return; | |
1525 | ent->guilty = 1; | |
1526 | if (incremental) { | |
1527 | struct origin *suspect = ent->suspect; | |
1528 | ||
1529 | printf("%s %d %d %d\n", | |
1530 | sha1_to_hex(suspect->commit->object.sha1), | |
1531 | ent->s_lno + 1, ent->lno + 1, ent->num_lines); | |
9991030c | 1532 | emit_one_suspect_detail(suspect); |
46e5e69d | 1533 | write_filename_info(suspect->path); |
06f59e9f | 1534 | maybe_flush_or_die(stdout, "stdout"); |
717d1462 LT |
1535 | } |
1536 | } | |
1537 | ||
1732a1fd JH |
1538 | /* |
1539 | * The main loop -- while the scoreboard has lines whose true origin | |
3dff5379 | 1540 | * is still unknown, pick one blame_entry, and allow its current |
1732a1fd JH |
1541 | * suspect to pass blames to its parents. |
1542 | */ | |
85af7929 | 1543 | static void assign_blame(struct scoreboard *sb, int opt) |
717d1462 | 1544 | { |
85af7929 JH |
1545 | struct rev_info *revs = sb->revs; |
1546 | ||
717d1462 LT |
1547 | while (1) { |
1548 | struct blame_entry *ent; | |
1549 | struct commit *commit; | |
1550 | struct origin *suspect = NULL; | |
1551 | ||
1552 | /* find one suspect to break down */ | |
1553 | for (ent = sb->ent; !suspect && ent; ent = ent->next) | |
1554 | if (!ent->guilty) | |
1555 | suspect = ent->suspect; | |
1556 | if (!suspect) | |
1557 | return; /* all done */ | |
1558 | ||
1732a1fd JH |
1559 | /* |
1560 | * We will use this suspect later in the loop, | |
1561 | * so hold onto it in the meantime. | |
1562 | */ | |
717d1462 LT |
1563 | origin_incref(suspect); |
1564 | commit = suspect->commit; | |
1565 | if (!commit->object.parsed) | |
1566 | parse_commit(commit); | |
85af7929 JH |
1567 | if (reverse || |
1568 | (!(commit->object.flags & UNINTERESTING) && | |
1569 | !(revs->max_age != -1 && commit->date < revs->max_age))) | |
717d1462 LT |
1570 | pass_blame(sb, suspect, opt); |
1571 | else { | |
1572 | commit->object.flags |= UNINTERESTING; | |
1573 | if (commit->object.parsed) | |
1574 | mark_parents_uninteresting(commit); | |
1575 | } | |
1576 | /* treat root commit as boundary */ | |
1577 | if (!commit->parents && !show_root) | |
1578 | commit->object.flags |= UNINTERESTING; | |
1579 | ||
1580 | /* Take responsibility for the remaining entries */ | |
1581 | for (ent = sb->ent; ent; ent = ent->next) | |
171dccd5 | 1582 | if (same_suspect(ent->suspect, suspect)) |
717d1462 LT |
1583 | found_guilty_entry(ent); |
1584 | origin_decref(suspect); | |
1585 | ||
1586 | if (DEBUG) /* sanity */ | |
1587 | sanity_check_refcnt(sb); | |
1588 | } | |
1589 | } | |
1590 | ||
1591 | static const char *format_time(unsigned long time, const char *tz_str, | |
1592 | int show_raw_time) | |
1593 | { | |
1594 | static char time_buf[128]; | |
31653c1a EL |
1595 | const char *time_str; |
1596 | int time_len; | |
1597 | int tz; | |
717d1462 LT |
1598 | |
1599 | if (show_raw_time) { | |
1600 | sprintf(time_buf, "%lu %s", time, tz_str); | |
717d1462 | 1601 | } |
31653c1a EL |
1602 | else { |
1603 | tz = atoi(tz_str); | |
1604 | time_str = show_date(time, tz, blame_date_mode); | |
1605 | time_len = strlen(time_str); | |
1606 | memcpy(time_buf, time_str, time_len); | |
1607 | memset(time_buf + time_len, ' ', blame_date_width - time_len); | |
1608 | } | |
717d1462 LT |
1609 | return time_buf; |
1610 | } | |
1611 | ||
cee7f245 JH |
1612 | #define OUTPUT_ANNOTATE_COMPAT 001 |
1613 | #define OUTPUT_LONG_OBJECT_NAME 002 | |
1614 | #define OUTPUT_RAW_TIMESTAMP 004 | |
1615 | #define OUTPUT_PORCELAIN 010 | |
1616 | #define OUTPUT_SHOW_NAME 020 | |
1617 | #define OUTPUT_SHOW_NUMBER 040 | |
5ff62c30 | 1618 | #define OUTPUT_SHOW_SCORE 0100 |
093dc5be | 1619 | #define OUTPUT_NO_AUTHOR 0200 |
1b8cdce9 | 1620 | #define OUTPUT_SHOW_EMAIL 0400 |
cee7f245 JH |
1621 | |
1622 | static void emit_porcelain(struct scoreboard *sb, struct blame_entry *ent) | |
1623 | { | |
1624 | int cnt; | |
1625 | const char *cp; | |
1626 | struct origin *suspect = ent->suspect; | |
1627 | char hex[41]; | |
1628 | ||
1629 | strcpy(hex, sha1_to_hex(suspect->commit->object.sha1)); | |
1630 | printf("%s%c%d %d %d\n", | |
1631 | hex, | |
2543d9b6 | 1632 | ent->guilty ? ' ' : '*', /* purely for debugging */ |
cee7f245 JH |
1633 | ent->s_lno + 1, |
1634 | ent->lno + 1, | |
1635 | ent->num_lines); | |
9991030c JH |
1636 | if (emit_one_suspect_detail(suspect) || |
1637 | (suspect->commit->object.flags & MORE_THAN_ONE_PATH)) | |
46e5e69d | 1638 | write_filename_info(suspect->path); |
cee7f245 JH |
1639 | |
1640 | cp = nth_line(sb, ent->lno); | |
1641 | for (cnt = 0; cnt < ent->num_lines; cnt++) { | |
1642 | char ch; | |
1643 | if (cnt) | |
1644 | printf("%s %d %d\n", hex, | |
1645 | ent->s_lno + 1 + cnt, | |
1646 | ent->lno + 1 + cnt); | |
1647 | putchar('\t'); | |
1648 | do { | |
1649 | ch = *cp++; | |
1650 | putchar(ch); | |
1651 | } while (ch != '\n' && | |
1652 | cp < sb->final_buf + sb->final_buf_size); | |
1653 | } | |
a5ca8367 JS |
1654 | |
1655 | if (sb->final_buf_size && cp[-1] != '\n') | |
1656 | putchar('\n'); | |
cee7f245 JH |
1657 | } |
1658 | ||
1659 | static void emit_other(struct scoreboard *sb, struct blame_entry *ent, int opt) | |
1660 | { | |
1661 | int cnt; | |
1662 | const char *cp; | |
1663 | struct origin *suspect = ent->suspect; | |
1664 | struct commit_info ci; | |
1665 | char hex[41]; | |
1666 | int show_raw_time = !!(opt & OUTPUT_RAW_TIMESTAMP); | |
1667 | ||
1668 | get_commit_info(suspect->commit, &ci, 1); | |
1669 | strcpy(hex, sha1_to_hex(suspect->commit->object.sha1)); | |
1670 | ||
1671 | cp = nth_line(sb, ent->lno); | |
1672 | for (cnt = 0; cnt < ent->num_lines; cnt++) { | |
1673 | char ch; | |
84393bfd | 1674 | int length = (opt & OUTPUT_LONG_OBJECT_NAME) ? 40 : abbrev; |
b11121d9 JH |
1675 | |
1676 | if (suspect->commit->object.flags & UNINTERESTING) { | |
e68989a7 JH |
1677 | if (blank_boundary) |
1678 | memset(hex, ' ', length); | |
7ceacdff | 1679 | else if (!(opt & OUTPUT_ANNOTATE_COMPAT)) { |
4c10a5ca JH |
1680 | length--; |
1681 | putchar('^'); | |
1682 | } | |
b11121d9 | 1683 | } |
cee7f245 | 1684 | |
b11121d9 | 1685 | printf("%.*s", length, hex); |
1b8cdce9 KB |
1686 | if (opt & OUTPUT_ANNOTATE_COMPAT) { |
1687 | const char *name; | |
1688 | if (opt & OUTPUT_SHOW_EMAIL) | |
1689 | name = ci.author_mail; | |
1690 | else | |
1691 | name = ci.author; | |
1692 | printf("\t(%10s\t%10s\t%d)", name, | |
cee7f245 JH |
1693 | format_time(ci.author_time, ci.author_tz, |
1694 | show_raw_time), | |
1695 | ent->lno + 1 + cnt); | |
1b8cdce9 | 1696 | } else { |
5ff62c30 | 1697 | if (opt & OUTPUT_SHOW_SCORE) |
54a4c617 JH |
1698 | printf(" %*d %02d", |
1699 | max_score_digits, ent->score, | |
1700 | ent->suspect->refcnt); | |
cee7f245 JH |
1701 | if (opt & OUTPUT_SHOW_NAME) |
1702 | printf(" %-*.*s", longest_file, longest_file, | |
1703 | suspect->path); | |
1704 | if (opt & OUTPUT_SHOW_NUMBER) | |
1705 | printf(" %*d", max_orig_digits, | |
1706 | ent->s_lno + 1 + cnt); | |
093dc5be | 1707 | |
ffaf9cc0 | 1708 | if (!(opt & OUTPUT_NO_AUTHOR)) { |
1b8cdce9 KB |
1709 | const char *name; |
1710 | int pad; | |
1711 | if (opt & OUTPUT_SHOW_EMAIL) | |
1712 | name = ci.author_mail; | |
1713 | else | |
1714 | name = ci.author; | |
1715 | pad = longest_author - utf8_strwidth(name); | |
ffaf9cc0 | 1716 | printf(" (%s%*s %10s", |
1b8cdce9 | 1717 | name, pad, "", |
093dc5be JH |
1718 | format_time(ci.author_time, |
1719 | ci.author_tz, | |
1720 | show_raw_time)); | |
ffaf9cc0 | 1721 | } |
093dc5be | 1722 | printf(" %*d) ", |
cee7f245 JH |
1723 | max_digits, ent->lno + 1 + cnt); |
1724 | } | |
1725 | do { | |
1726 | ch = *cp++; | |
1727 | putchar(ch); | |
1728 | } while (ch != '\n' && | |
1729 | cp < sb->final_buf + sb->final_buf_size); | |
1730 | } | |
a5ca8367 JS |
1731 | |
1732 | if (sb->final_buf_size && cp[-1] != '\n') | |
1733 | putchar('\n'); | |
cee7f245 JH |
1734 | } |
1735 | ||
1736 | static void output(struct scoreboard *sb, int option) | |
1737 | { | |
1738 | struct blame_entry *ent; | |
1739 | ||
1740 | if (option & OUTPUT_PORCELAIN) { | |
1741 | for (ent = sb->ent; ent; ent = ent->next) { | |
1742 | struct blame_entry *oth; | |
1743 | struct origin *suspect = ent->suspect; | |
1744 | struct commit *commit = suspect->commit; | |
1745 | if (commit->object.flags & MORE_THAN_ONE_PATH) | |
1746 | continue; | |
1747 | for (oth = ent->next; oth; oth = oth->next) { | |
1748 | if ((oth->suspect->commit != commit) || | |
1749 | !strcmp(oth->suspect->path, suspect->path)) | |
1750 | continue; | |
1751 | commit->object.flags |= MORE_THAN_ONE_PATH; | |
1752 | break; | |
1753 | } | |
1754 | } | |
1755 | } | |
1756 | ||
1757 | for (ent = sb->ent; ent; ent = ent->next) { | |
1758 | if (option & OUTPUT_PORCELAIN) | |
1759 | emit_porcelain(sb, ent); | |
5ff62c30 | 1760 | else { |
cee7f245 | 1761 | emit_other(sb, ent, option); |
5ff62c30 | 1762 | } |
cee7f245 JH |
1763 | } |
1764 | } | |
1765 | ||
1732a1fd JH |
1766 | /* |
1767 | * To allow quick access to the contents of nth line in the | |
1768 | * final image, prepare an index in the scoreboard. | |
1769 | */ | |
cee7f245 JH |
1770 | static int prepare_lines(struct scoreboard *sb) |
1771 | { | |
1772 | const char *buf = sb->final_buf; | |
1773 | unsigned long len = sb->final_buf_size; | |
1774 | int num = 0, incomplete = 0, bol = 1; | |
1775 | ||
1776 | if (len && buf[len-1] != '\n') | |
1777 | incomplete++; /* incomplete line at the end */ | |
1778 | while (len--) { | |
1779 | if (bol) { | |
1780 | sb->lineno = xrealloc(sb->lineno, | |
4b25d091 | 1781 | sizeof(int *) * (num + 1)); |
cee7f245 JH |
1782 | sb->lineno[num] = buf - sb->final_buf; |
1783 | bol = 0; | |
1784 | } | |
1785 | if (*buf++ == '\n') { | |
1786 | num++; | |
1787 | bol = 1; | |
1788 | } | |
1789 | } | |
1ca6ca87 | 1790 | sb->lineno = xrealloc(sb->lineno, |
4b25d091 | 1791 | sizeof(int *) * (num + incomplete + 1)); |
1ca6ca87 | 1792 | sb->lineno[num + incomplete] = buf - sb->final_buf; |
cee7f245 JH |
1793 | sb->num_lines = num + incomplete; |
1794 | return sb->num_lines; | |
1795 | } | |
1796 | ||
1732a1fd JH |
1797 | /* |
1798 | * Add phony grafts for use with -S; this is primarily to | |
34baebce | 1799 | * support git's cvsserver that wants to give a linear history |
1732a1fd JH |
1800 | * to its clients. |
1801 | */ | |
cee7f245 JH |
1802 | static int read_ancestry(const char *graft_file) |
1803 | { | |
1804 | FILE *fp = fopen(graft_file, "r"); | |
1805 | char buf[1024]; | |
1806 | if (!fp) | |
1807 | return -1; | |
1808 | while (fgets(buf, sizeof(buf), fp)) { | |
1809 | /* The format is just "Commit Parent1 Parent2 ...\n" */ | |
1810 | int len = strlen(buf); | |
1811 | struct commit_graft *graft = read_graft_line(buf, len); | |
8eaf7986 JH |
1812 | if (graft) |
1813 | register_commit_graft(graft, 0); | |
cee7f245 JH |
1814 | } |
1815 | fclose(fp); | |
1816 | return 0; | |
1817 | } | |
1818 | ||
1732a1fd JH |
1819 | /* |
1820 | * How many columns do we need to show line numbers in decimal? | |
1821 | */ | |
cee7f245 JH |
1822 | static int lineno_width(int lines) |
1823 | { | |
f2915045 | 1824 | int i, width; |
cee7f245 | 1825 | |
00fb3d21 | 1826 | for (width = 1, i = 10; i <= lines; width++) |
f2915045 JH |
1827 | i *= 10; |
1828 | return width; | |
cee7f245 JH |
1829 | } |
1830 | ||
1732a1fd JH |
1831 | /* |
1832 | * How many columns do we need to show line numbers, authors, | |
1833 | * and filenames? | |
1834 | */ | |
cee7f245 JH |
1835 | static void find_alignment(struct scoreboard *sb, int *option) |
1836 | { | |
1837 | int longest_src_lines = 0; | |
1838 | int longest_dst_lines = 0; | |
5ff62c30 | 1839 | unsigned largest_score = 0; |
cee7f245 JH |
1840 | struct blame_entry *e; |
1841 | ||
1842 | for (e = sb->ent; e; e = e->next) { | |
1843 | struct origin *suspect = e->suspect; | |
1844 | struct commit_info ci; | |
1845 | int num; | |
1846 | ||
ab3bb800 JH |
1847 | if (strcmp(suspect->path, sb->path)) |
1848 | *option |= OUTPUT_SHOW_NAME; | |
1849 | num = strlen(suspect->path); | |
1850 | if (longest_file < num) | |
1851 | longest_file = num; | |
cee7f245 JH |
1852 | if (!(suspect->commit->object.flags & METAINFO_SHOWN)) { |
1853 | suspect->commit->object.flags |= METAINFO_SHOWN; | |
1854 | get_commit_info(suspect->commit, &ci, 1); | |
1b8cdce9 KB |
1855 | if (*option & OUTPUT_SHOW_EMAIL) |
1856 | num = utf8_strwidth(ci.author_mail); | |
1857 | else | |
1858 | num = utf8_strwidth(ci.author); | |
cee7f245 JH |
1859 | if (longest_author < num) |
1860 | longest_author = num; | |
1861 | } | |
1862 | num = e->s_lno + e->num_lines; | |
1863 | if (longest_src_lines < num) | |
1864 | longest_src_lines = num; | |
1865 | num = e->lno + e->num_lines; | |
1866 | if (longest_dst_lines < num) | |
1867 | longest_dst_lines = num; | |
5ff62c30 JH |
1868 | if (largest_score < ent_score(sb, e)) |
1869 | largest_score = ent_score(sb, e); | |
cee7f245 JH |
1870 | } |
1871 | max_orig_digits = lineno_width(longest_src_lines); | |
1872 | max_digits = lineno_width(longest_dst_lines); | |
5ff62c30 | 1873 | max_score_digits = lineno_width(largest_score); |
cee7f245 JH |
1874 | } |
1875 | ||
1732a1fd JH |
1876 | /* |
1877 | * For debugging -- origin is refcounted, and this asserts that | |
1878 | * we do not underflow. | |
1879 | */ | |
54a4c617 JH |
1880 | static void sanity_check_refcnt(struct scoreboard *sb) |
1881 | { | |
1882 | int baa = 0; | |
1883 | struct blame_entry *ent; | |
1884 | ||
1885 | for (ent = sb->ent; ent; ent = ent->next) { | |
ae86ad65 | 1886 | /* Nobody should have zero or negative refcnt */ |
854b97f6 JH |
1887 | if (ent->suspect->refcnt <= 0) { |
1888 | fprintf(stderr, "%s in %s has negative refcnt %d\n", | |
1889 | ent->suspect->path, | |
1890 | sha1_to_hex(ent->suspect->commit->object.sha1), | |
1891 | ent->suspect->refcnt); | |
ae86ad65 | 1892 | baa = 1; |
854b97f6 | 1893 | } |
ae86ad65 | 1894 | } |
54a4c617 JH |
1895 | if (baa) { |
1896 | int opt = 0160; | |
1897 | find_alignment(sb, &opt); | |
1898 | output(sb, opt); | |
854b97f6 | 1899 | die("Baa %d!", baa); |
54a4c617 JH |
1900 | } |
1901 | } | |
1902 | ||
1732a1fd JH |
1903 | /* |
1904 | * Used for the command line parsing; check if the path exists | |
1905 | * in the working tree. | |
1906 | */ | |
c455c87c | 1907 | static int has_string_in_work_tree(const char *path) |
cee7f245 JH |
1908 | { |
1909 | struct stat st; | |
1910 | return !lstat(path, &st); | |
1911 | } | |
1912 | ||
4a0fc95f JH |
1913 | static unsigned parse_score(const char *arg) |
1914 | { | |
1915 | char *end; | |
1916 | unsigned long score = strtoul(arg, &end, 10); | |
1917 | if (*end) | |
1918 | return 0; | |
1919 | return score; | |
1920 | } | |
1921 | ||
20239bae JK |
1922 | static const char *add_prefix(const char *prefix, const char *path) |
1923 | { | |
097971f5 | 1924 | return prefix_path(prefix, prefix ? strlen(prefix) : 0, path); |
20239bae JK |
1925 | } |
1926 | ||
1732a1fd JH |
1927 | /* |
1928 | * Parsing of (comma separated) one item in the -L option | |
1929 | */ | |
931233bc JH |
1930 | static const char *parse_loc(const char *spec, |
1931 | struct scoreboard *sb, long lno, | |
1932 | long begin, long *ret) | |
1933 | { | |
1934 | char *term; | |
1935 | const char *line; | |
1936 | long num; | |
1937 | int reg_error; | |
1938 | regex_t regexp; | |
1939 | regmatch_t match[1]; | |
1940 | ||
7bd9641d JH |
1941 | /* Allow "-L <something>,+20" to mean starting at <something> |
1942 | * for 20 lines, or "-L <something>,-5" for 5 lines ending at | |
1943 | * <something>. | |
1944 | */ | |
1945 | if (1 < begin && (spec[0] == '+' || spec[0] == '-')) { | |
1946 | num = strtol(spec + 1, &term, 10); | |
1947 | if (term != spec + 1) { | |
1948 | if (spec[0] == '-') | |
1949 | num = 0 - num; | |
1950 | if (0 < num) | |
1951 | *ret = begin + num - 2; | |
1952 | else if (!num) | |
1953 | *ret = begin; | |
1954 | else | |
1955 | *ret = begin + num; | |
1956 | return term; | |
1957 | } | |
1958 | return spec; | |
1959 | } | |
931233bc JH |
1960 | num = strtol(spec, &term, 10); |
1961 | if (term != spec) { | |
1962 | *ret = num; | |
1963 | return term; | |
1964 | } | |
1965 | if (spec[0] != '/') | |
1966 | return spec; | |
1967 | ||
1968 | /* it could be a regexp of form /.../ */ | |
4b25d091 | 1969 | for (term = (char *) spec + 1; *term && *term != '/'; term++) { |
931233bc JH |
1970 | if (*term == '\\') |
1971 | term++; | |
1972 | } | |
1973 | if (*term != '/') | |
1974 | return spec; | |
1975 | ||
1976 | /* try [spec+1 .. term-1] as regexp */ | |
1977 | *term = 0; | |
1978 | begin--; /* input is in human terms */ | |
1979 | line = nth_line(sb, begin); | |
1980 | ||
1981 | if (!(reg_error = regcomp(®exp, spec + 1, REG_NEWLINE)) && | |
1982 | !(reg_error = regexec(®exp, line, 1, match, 0))) { | |
1983 | const char *cp = line + match[0].rm_so; | |
1984 | const char *nline; | |
1985 | ||
1986 | while (begin++ < lno) { | |
1987 | nline = nth_line(sb, begin); | |
1988 | if (line <= cp && cp < nline) | |
1989 | break; | |
1990 | line = nline; | |
1991 | } | |
1992 | *ret = begin; | |
1993 | regfree(®exp); | |
1994 | *term++ = '/'; | |
1995 | return term; | |
1996 | } | |
1997 | else { | |
1998 | char errbuf[1024]; | |
1999 | regerror(reg_error, ®exp, errbuf, 1024); | |
2000 | die("-L parameter '%s': %s", spec + 1, errbuf); | |
2001 | } | |
2002 | } | |
2003 | ||
1732a1fd JH |
2004 | /* |
2005 | * Parsing of -L option | |
2006 | */ | |
931233bc JH |
2007 | static void prepare_blame_range(struct scoreboard *sb, |
2008 | const char *bottomtop, | |
2009 | long lno, | |
2010 | long *bottom, long *top) | |
2011 | { | |
2012 | const char *term; | |
2013 | ||
2014 | term = parse_loc(bottomtop, sb, lno, 1, bottom); | |
2015 | if (*term == ',') { | |
2016 | term = parse_loc(term + 1, sb, lno, *bottom + 1, top); | |
2017 | if (*term) | |
acca687f | 2018 | usage(blame_usage); |
931233bc JH |
2019 | } |
2020 | if (*term) | |
acca687f | 2021 | usage(blame_usage); |
931233bc JH |
2022 | } |
2023 | ||
ef90d6d4 | 2024 | static int git_blame_config(const char *var, const char *value, void *cb) |
4c10a5ca JH |
2025 | { |
2026 | if (!strcmp(var, "blame.showroot")) { | |
2027 | show_root = git_config_bool(var, value); | |
2028 | return 0; | |
2029 | } | |
2030 | if (!strcmp(var, "blame.blankboundary")) { | |
2031 | blank_boundary = git_config_bool(var, value); | |
2032 | return 0; | |
2033 | } | |
31653c1a EL |
2034 | if (!strcmp(var, "blame.date")) { |
2035 | if (!value) | |
2036 | return config_error_nonbool(var); | |
2037 | blame_date_mode = parse_date_format(value); | |
2038 | return 0; | |
2039 | } | |
3b8a12e8 AB |
2040 | |
2041 | switch (userdiff_config(var, value)) { | |
2042 | case 0: | |
2043 | break; | |
2044 | case -1: | |
2045 | return -1; | |
2046 | default: | |
2047 | return 0; | |
2048 | } | |
2049 | ||
ef90d6d4 | 2050 | return git_default_config(var, value, cb); |
4c10a5ca JH |
2051 | } |
2052 | ||
f6c07d7d JH |
2053 | /* |
2054 | * Prepare a dummy commit that represents the work tree (or staged) item. | |
2055 | * Note that annotating work tree item never works in the reverse. | |
2056 | */ | |
3b8a12e8 AB |
2057 | static struct commit *fake_working_tree_commit(struct diff_options *opt, |
2058 | const char *path, | |
2059 | const char *contents_from) | |
1cfe7733 JH |
2060 | { |
2061 | struct commit *commit; | |
2062 | struct origin *origin; | |
2063 | unsigned char head_sha1[20]; | |
f285a2d7 | 2064 | struct strbuf buf = STRBUF_INIT; |
1cfe7733 | 2065 | const char *ident; |
1cfe7733 | 2066 | time_t now; |
1cfe7733 JH |
2067 | int size, len; |
2068 | struct cache_entry *ce; | |
2069 | unsigned mode; | |
2070 | ||
2071 | if (get_sha1("HEAD", head_sha1)) | |
2072 | die("No such ref: HEAD"); | |
2073 | ||
2074 | time(&now); | |
2075 | commit = xcalloc(1, sizeof(*commit)); | |
2076 | commit->parents = xcalloc(1, sizeof(*commit->parents)); | |
2077 | commit->parents->item = lookup_commit_reference(head_sha1); | |
2078 | commit->object.parsed = 1; | |
2079 | commit->date = now; | |
2080 | commit->object.type = OBJ_COMMIT; | |
2081 | ||
2082 | origin = make_origin(commit, path); | |
2083 | ||
2084 | if (!contents_from || strcmp("-", contents_from)) { | |
2085 | struct stat st; | |
2086 | const char *read_from; | |
3b8a12e8 | 2087 | unsigned long buf_len; |
1cfe7733 JH |
2088 | |
2089 | if (contents_from) { | |
2090 | if (stat(contents_from, &st) < 0) | |
0721c314 | 2091 | die_errno("Cannot stat '%s'", contents_from); |
1cfe7733 JH |
2092 | read_from = contents_from; |
2093 | } | |
2094 | else { | |
2095 | if (lstat(path, &st) < 0) | |
0721c314 | 2096 | die_errno("Cannot lstat '%s'", path); |
1cfe7733 JH |
2097 | read_from = path; |
2098 | } | |
1cfe7733 | 2099 | mode = canon_mode(st.st_mode); |
3b8a12e8 | 2100 | |
1cfe7733 JH |
2101 | switch (st.st_mode & S_IFMT) { |
2102 | case S_IFREG: | |
3b8a12e8 | 2103 | if (DIFF_OPT_TST(opt, ALLOW_TEXTCONV) && |
90064710 | 2104 | textconv_object(read_from, mode, null_sha1, &buf.buf, &buf_len)) |
3b8a12e8 AB |
2105 | buf.len = buf_len; |
2106 | else if (strbuf_read_file(&buf, read_from, st.st_size) != st.st_size) | |
0721c314 | 2107 | die_errno("cannot open or read '%s'", read_from); |
1cfe7733 JH |
2108 | break; |
2109 | case S_IFLNK: | |
edfd45d2 | 2110 | if (strbuf_readlink(&buf, read_from, st.st_size) < 0) |
0721c314 | 2111 | die_errno("cannot readlink '%s'", read_from); |
1cfe7733 JH |
2112 | break; |
2113 | default: | |
2114 | die("unsupported file type %s", read_from); | |
2115 | } | |
2116 | } | |
2117 | else { | |
2118 | /* Reading from stdin */ | |
2119 | contents_from = "standard input"; | |
1cfe7733 | 2120 | mode = 0; |
f1696ee3 | 2121 | if (strbuf_read(&buf, 0, 0) < 0) |
d824cbba | 2122 | die_errno("failed to read from stdin"); |
1cfe7733 | 2123 | } |
21e5ad50 | 2124 | convert_to_git(path, buf.buf, buf.len, &buf, 0); |
af6eb822 PH |
2125 | origin->file.ptr = buf.buf; |
2126 | origin->file.size = buf.len; | |
2127 | pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, origin->blob_sha1); | |
1cfe7733 JH |
2128 | commit->util = origin; |
2129 | ||
2130 | /* | |
2131 | * Read the current index, replace the path entry with | |
2132 | * origin->blob_sha1 without mucking with its mode or type | |
2133 | * bits; we are not going to write this index out -- we just | |
2134 | * want to run "diff-index --cached". | |
2135 | */ | |
2136 | discard_cache(); | |
2137 | read_cache(); | |
2138 | ||
2139 | len = strlen(path); | |
2140 | if (!mode) { | |
2141 | int pos = cache_name_pos(path, len); | |
2142 | if (0 <= pos) | |
7a51ed66 | 2143 | mode = active_cache[pos]->ce_mode; |
1cfe7733 JH |
2144 | else |
2145 | /* Let's not bother reading from HEAD tree */ | |
2146 | mode = S_IFREG | 0644; | |
2147 | } | |
2148 | size = cache_entry_size(len); | |
2149 | ce = xcalloc(1, size); | |
2150 | hashcpy(ce->sha1, origin->blob_sha1); | |
2151 | memcpy(ce->name, path, len); | |
2152 | ce->ce_flags = create_ce_flags(len, 0); | |
2153 | ce->ce_mode = create_ce_mode(mode); | |
2154 | add_cache_entry(ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE); | |
2155 | ||
2156 | /* | |
2157 | * We are not going to write this out, so this does not matter | |
2158 | * right now, but someday we might optimize diff-index --cached | |
2159 | * with cache-tree information. | |
2160 | */ | |
2161 | cache_tree_invalidate_path(active_cache_tree, path); | |
2162 | ||
2163 | commit->buffer = xmalloc(400); | |
2164 | ident = fmt_ident("Not Committed Yet", "not.committed.yet", NULL, 0); | |
1bb88be9 | 2165 | snprintf(commit->buffer, 400, |
1cfe7733 JH |
2166 | "tree 0000000000000000000000000000000000000000\n" |
2167 | "parent %s\n" | |
2168 | "author %s\n" | |
2169 | "committer %s\n\n" | |
2170 | "Version of %s from %s\n", | |
2171 | sha1_to_hex(head_sha1), | |
2172 | ident, ident, path, contents_from ? contents_from : path); | |
2173 | return commit; | |
2174 | } | |
2175 | ||
85af7929 | 2176 | static const char *prepare_final(struct scoreboard *sb) |
f6c07d7d JH |
2177 | { |
2178 | int i; | |
2179 | const char *final_commit_name = NULL; | |
85af7929 | 2180 | struct rev_info *revs = sb->revs; |
f6c07d7d JH |
2181 | |
2182 | /* | |
2183 | * There must be one and only one positive commit in the | |
2184 | * revs->pending array. | |
2185 | */ | |
2186 | for (i = 0; i < revs->pending.nr; i++) { | |
2187 | struct object *obj = revs->pending.objects[i].item; | |
2188 | if (obj->flags & UNINTERESTING) | |
2189 | continue; | |
2190 | while (obj->type == OBJ_TAG) | |
2191 | obj = deref_tag(obj, NULL, 0); | |
2192 | if (obj->type != OBJ_COMMIT) | |
2193 | die("Non commit %s?", revs->pending.objects[i].name); | |
2194 | if (sb->final) | |
2195 | die("More than one commit to dig from %s and %s?", | |
2196 | revs->pending.objects[i].name, | |
2197 | final_commit_name); | |
2198 | sb->final = (struct commit *) obj; | |
2199 | final_commit_name = revs->pending.objects[i].name; | |
2200 | } | |
2201 | return final_commit_name; | |
2202 | } | |
2203 | ||
85af7929 JH |
2204 | static const char *prepare_initial(struct scoreboard *sb) |
2205 | { | |
2206 | int i; | |
2207 | const char *final_commit_name = NULL; | |
2208 | struct rev_info *revs = sb->revs; | |
2209 | ||
2210 | /* | |
2211 | * There must be one and only one negative commit, and it must be | |
2212 | * the boundary. | |
2213 | */ | |
2214 | for (i = 0; i < revs->pending.nr; i++) { | |
2215 | struct object *obj = revs->pending.objects[i].item; | |
2216 | if (!(obj->flags & UNINTERESTING)) | |
2217 | continue; | |
2218 | while (obj->type == OBJ_TAG) | |
2219 | obj = deref_tag(obj, NULL, 0); | |
2220 | if (obj->type != OBJ_COMMIT) | |
2221 | die("Non commit %s?", revs->pending.objects[i].name); | |
2222 | if (sb->final) | |
2223 | die("More than one commit to dig down to %s and %s?", | |
2224 | revs->pending.objects[i].name, | |
2225 | final_commit_name); | |
2226 | sb->final = (struct commit *) obj; | |
2227 | final_commit_name = revs->pending.objects[i].name; | |
2228 | } | |
2229 | if (!final_commit_name) | |
2230 | die("No commit to dig down to?"); | |
2231 | return final_commit_name; | |
2232 | } | |
2233 | ||
5817da01 PH |
2234 | static int blame_copy_callback(const struct option *option, const char *arg, int unset) |
2235 | { | |
2236 | int *opt = option->value; | |
2237 | ||
2238 | /* | |
2239 | * -C enables copy from removed files; | |
2240 | * -C -C enables copy from existing files, but only | |
2241 | * when blaming a new file; | |
2242 | * -C -C -C enables copy from existing files for | |
2243 | * everybody | |
2244 | */ | |
2245 | if (*opt & PICKAXE_BLAME_COPY_HARDER) | |
2246 | *opt |= PICKAXE_BLAME_COPY_HARDEST; | |
2247 | if (*opt & PICKAXE_BLAME_COPY) | |
2248 | *opt |= PICKAXE_BLAME_COPY_HARDER; | |
2249 | *opt |= PICKAXE_BLAME_COPY | PICKAXE_BLAME_MOVE; | |
2250 | ||
2251 | if (arg) | |
2252 | blame_copy_score = parse_score(arg); | |
2253 | return 0; | |
2254 | } | |
2255 | ||
2256 | static int blame_move_callback(const struct option *option, const char *arg, int unset) | |
2257 | { | |
2258 | int *opt = option->value; | |
2259 | ||
2260 | *opt |= PICKAXE_BLAME_MOVE; | |
2261 | ||
2262 | if (arg) | |
2263 | blame_move_score = parse_score(arg); | |
2264 | return 0; | |
2265 | } | |
2266 | ||
2267 | static int blame_bottomtop_callback(const struct option *option, const char *arg, int unset) | |
2268 | { | |
2269 | const char **bottomtop = option->value; | |
2270 | if (!arg) | |
2271 | return -1; | |
2272 | if (*bottomtop) | |
2273 | die("More than one '-L n,m' option given"); | |
2274 | *bottomtop = arg; | |
2275 | return 0; | |
2276 | } | |
2277 | ||
acca687f | 2278 | int cmd_blame(int argc, const char **argv, const char *prefix) |
cee7f245 JH |
2279 | { |
2280 | struct rev_info revs; | |
2281 | const char *path; | |
2282 | struct scoreboard sb; | |
2283 | struct origin *o; | |
2284 | struct blame_entry *ent; | |
3f8d5204 | 2285 | long dashdash_pos, bottom, top, lno; |
cee7f245 | 2286 | const char *final_commit_name = NULL; |
21666f1a | 2287 | enum object_type type; |
5817da01 PH |
2288 | |
2289 | static const char *bottomtop = NULL; | |
2290 | static int output_option = 0, opt = 0; | |
2291 | static int show_stats = 0; | |
2292 | static const char *revs_file = NULL; | |
2293 | static const char *contents_from = NULL; | |
2294 | static const struct option options[] = { | |
2295 | OPT_BOOLEAN(0, "incremental", &incremental, "Show blame entries as we find them, incrementally"), | |
2296 | OPT_BOOLEAN('b', NULL, &blank_boundary, "Show blank SHA-1 for boundary commits (Default: off)"), | |
2297 | OPT_BOOLEAN(0, "root", &show_root, "Do not treat root commits as boundaries (Default: off)"), | |
2298 | OPT_BOOLEAN(0, "show-stats", &show_stats, "Show work cost statistics"), | |
2299 | OPT_BIT(0, "score-debug", &output_option, "Show output score for blame entries", OUTPUT_SHOW_SCORE), | |
2300 | OPT_BIT('f', "show-name", &output_option, "Show original filename (Default: auto)", OUTPUT_SHOW_NAME), | |
2301 | OPT_BIT('n', "show-number", &output_option, "Show original linenumber (Default: off)", OUTPUT_SHOW_NUMBER), | |
2302 | OPT_BIT('p', "porcelain", &output_option, "Show in a format designed for machine consumption", OUTPUT_PORCELAIN), | |
2303 | OPT_BIT('c', NULL, &output_option, "Use the same output mode as git-annotate (Default: off)", OUTPUT_ANNOTATE_COMPAT), | |
2304 | OPT_BIT('t', NULL, &output_option, "Show raw timestamp (Default: off)", OUTPUT_RAW_TIMESTAMP), | |
2305 | OPT_BIT('l', NULL, &output_option, "Show long commit SHA1 (Default: off)", OUTPUT_LONG_OBJECT_NAME), | |
2306 | OPT_BIT('s', NULL, &output_option, "Suppress author name and timestamp (Default: off)", OUTPUT_NO_AUTHOR), | |
1b8cdce9 | 2307 | OPT_BIT('e', "show-email", &output_option, "Show author email instead of name (Default: off)", OUTPUT_SHOW_EMAIL), |
5817da01 PH |
2308 | OPT_BIT('w', NULL, &xdl_opts, "Ignore whitespace differences", XDF_IGNORE_WHITESPACE), |
2309 | OPT_STRING('S', NULL, &revs_file, "file", "Use revisions from <file> instead of calling git-rev-list"), | |
2310 | OPT_STRING(0, "contents", &contents_from, "file", "Use <file>'s contents as the final image"), | |
2311 | { OPTION_CALLBACK, 'C', NULL, &opt, "score", "Find line copies within and across files", PARSE_OPT_OPTARG, blame_copy_callback }, | |
2312 | { OPTION_CALLBACK, 'M', NULL, &opt, "score", "Find line movements within and across files", PARSE_OPT_OPTARG, blame_move_callback }, | |
2313 | OPT_CALLBACK('L', NULL, &bottomtop, "n,m", "Process only line range n,m, counting from 1", blame_bottomtop_callback), | |
84393bfd | 2314 | OPT__ABBREV(&abbrev), |
5817da01 PH |
2315 | OPT_END() |
2316 | }; | |
2317 | ||
2318 | struct parse_opt_ctx_t ctx; | |
7ceacdff | 2319 | int cmd_is_annotate = !strcmp(argv[0], "annotate"); |
e68989a7 | 2320 | |
ef90d6d4 | 2321 | git_config(git_blame_config, NULL); |
5817da01 | 2322 | init_revisions(&revs, NULL); |
31653c1a | 2323 | revs.date_mode = blame_date_mode; |
3b8a12e8 | 2324 | DIFF_OPT_SET(&revs.diffopt, ALLOW_TEXTCONV); |
31653c1a | 2325 | |
612702e8 | 2326 | save_commit_buffer = 0; |
3f8d5204 | 2327 | dashdash_pos = 0; |
612702e8 | 2328 | |
9ca1169f SB |
2329 | parse_options_start(&ctx, argc, argv, prefix, options, |
2330 | PARSE_OPT_KEEP_DASHDASH | PARSE_OPT_KEEP_ARGV0); | |
5817da01 | 2331 | for (;;) { |
5817da01 PH |
2332 | switch (parse_options_step(&ctx, options, blame_opt_usage)) { |
2333 | case PARSE_OPT_HELP: | |
2334 | exit(129); | |
2335 | case PARSE_OPT_DONE: | |
3f8d5204 PH |
2336 | if (ctx.argv[0]) |
2337 | dashdash_pos = ctx.cpidx; | |
5817da01 PH |
2338 | goto parse_done; |
2339 | } | |
2340 | ||
2341 | if (!strcmp(ctx.argv[0], "--reverse")) { | |
2342 | ctx.argv[0] = "--children"; | |
2343 | reverse = 1; | |
2344 | } | |
6b61ec05 | 2345 | parse_revision_opt(&revs, &ctx, options, blame_opt_usage); |
5817da01 PH |
2346 | } |
2347 | parse_done: | |
2348 | argc = parse_options_end(&ctx); | |
2349 | ||
84393bfd NK |
2350 | if (abbrev == -1) |
2351 | abbrev = default_abbrev; | |
2352 | /* one more abbrev length is needed for the boundary commit */ | |
2353 | abbrev++; | |
2354 | ||
aa9ea77d | 2355 | if (revs_file && read_ancestry(revs_file)) |
d824cbba | 2356 | die_errno("reading graft file '%s' failed", revs_file); |
aa9ea77d | 2357 | |
31653c1a | 2358 | if (cmd_is_annotate) { |
7ceacdff | 2359 | output_option |= OUTPUT_ANNOTATE_COMPAT; |
31653c1a EL |
2360 | blame_date_mode = DATE_ISO8601; |
2361 | } else { | |
2362 | blame_date_mode = revs.date_mode; | |
2363 | } | |
2364 | ||
2365 | /* The maximum width used to show the dates */ | |
2366 | switch (blame_date_mode) { | |
2367 | case DATE_RFC2822: | |
2368 | blame_date_width = sizeof("Thu, 19 Oct 2006 16:00:04 -0700"); | |
2369 | break; | |
2370 | case DATE_ISO8601: | |
2371 | blame_date_width = sizeof("2006-10-19 16:00:04 -0700"); | |
2372 | break; | |
2373 | case DATE_RAW: | |
2374 | blame_date_width = sizeof("1161298804 -0700"); | |
2375 | break; | |
2376 | case DATE_SHORT: | |
2377 | blame_date_width = sizeof("2006-10-19"); | |
2378 | break; | |
2379 | case DATE_RELATIVE: | |
2380 | /* "normal" is used as the fallback for "relative" */ | |
2381 | case DATE_LOCAL: | |
2382 | case DATE_NORMAL: | |
2383 | blame_date_width = sizeof("Thu Oct 19 16:00:04 2006 -0700"); | |
2384 | break; | |
2385 | } | |
2386 | blame_date_width -= 1; /* strip the null */ | |
7ceacdff | 2387 | |
b3123f98 JH |
2388 | if (DIFF_OPT_TST(&revs.diffopt, FIND_COPIES_HARDER)) |
2389 | opt |= (PICKAXE_BLAME_COPY | PICKAXE_BLAME_MOVE | | |
2390 | PICKAXE_BLAME_COPY_HARDER); | |
2391 | ||
4a0fc95f JH |
2392 | if (!blame_move_score) |
2393 | blame_move_score = BLAME_DEFAULT_MOVE_SCORE; | |
2394 | if (!blame_copy_score) | |
2395 | blame_copy_score = BLAME_DEFAULT_COPY_SCORE; | |
2396 | ||
1732a1fd JH |
2397 | /* |
2398 | * We have collected options unknown to us in argv[1..unk] | |
cee7f245 | 2399 | * which are to be passed to revision machinery if we are |
3dff5379 | 2400 | * going to do the "bottom" processing. |
cee7f245 JH |
2401 | * |
2402 | * The remaining are: | |
2403 | * | |
22e5e58a | 2404 | * (1) if dashdash_pos != 0, it is either |
3f8d5204 PH |
2405 | * "blame [revisions] -- <path>" or |
2406 | * "blame -- <path> <rev>" | |
cee7f245 | 2407 | * |
22e5e58a | 2408 | * (2) otherwise, it is one of the two: |
3f8d5204 PH |
2409 | * "blame [revisions] <path>" |
2410 | * "blame <path> <rev>" | |
cee7f245 | 2411 | * |
3f8d5204 PH |
2412 | * Note that we must strip out <path> from the arguments: we do not |
2413 | * want the path pruning but we may want "bottom" processing. | |
cee7f245 | 2414 | */ |
3f8d5204 PH |
2415 | if (dashdash_pos) { |
2416 | switch (argc - dashdash_pos - 1) { | |
2417 | case 2: /* (1b) */ | |
2418 | if (argc != 4) | |
5817da01 | 2419 | usage_with_options(blame_opt_usage, options); |
3f8d5204 PH |
2420 | /* reorder for the new way: <rev> -- <path> */ |
2421 | argv[1] = argv[3]; | |
2422 | argv[3] = argv[2]; | |
2423 | argv[2] = "--"; | |
2424 | /* FALLTHROUGH */ | |
2425 | case 1: /* (1a) */ | |
2426 | path = add_prefix(prefix, argv[--argc]); | |
2427 | argv[argc] = NULL; | |
2428 | break; | |
2429 | default: | |
2430 | usage_with_options(blame_opt_usage, options); | |
cee7f245 | 2431 | } |
3f8d5204 PH |
2432 | } else { |
2433 | if (argc < 2) | |
5817da01 | 2434 | usage_with_options(blame_opt_usage, options); |
3f8d5204 | 2435 | path = add_prefix(prefix, argv[argc - 1]); |
c455c87c | 2436 | if (argc == 3 && !has_string_in_work_tree(path)) { /* (2b) */ |
3f8d5204 PH |
2437 | path = add_prefix(prefix, argv[1]); |
2438 | argv[1] = argv[2]; | |
cee7f245 | 2439 | } |
3f8d5204 | 2440 | argv[argc - 1] = "--"; |
cee7f245 | 2441 | |
3f8d5204 | 2442 | setup_work_tree(); |
c455c87c | 2443 | if (!has_string_in_work_tree(path)) |
d824cbba | 2444 | die_errno("cannot stat path '%s'", path); |
cee7f245 JH |
2445 | } |
2446 | ||
8b3dce56 | 2447 | revs.disable_stdin = 1; |
3f8d5204 | 2448 | setup_revisions(argc, argv, &revs, NULL); |
cee7f245 JH |
2449 | memset(&sb, 0, sizeof(sb)); |
2450 | ||
85af7929 JH |
2451 | sb.revs = &revs; |
2452 | if (!reverse) | |
2453 | final_commit_name = prepare_final(&sb); | |
2454 | else if (contents_from) | |
2455 | die("--contents and --children do not blend well."); | |
2456 | else | |
2457 | final_commit_name = prepare_initial(&sb); | |
cee7f245 JH |
2458 | |
2459 | if (!sb.final) { | |
1732a1fd JH |
2460 | /* |
2461 | * "--not A B -- path" without anything positive; | |
1cfe7733 JH |
2462 | * do not default to HEAD, but use the working tree |
2463 | * or "--contents". | |
1732a1fd | 2464 | */ |
1981820b | 2465 | setup_work_tree(); |
3b8a12e8 AB |
2466 | sb.final = fake_working_tree_commit(&sb.revs->diffopt, |
2467 | path, contents_from); | |
1cfe7733 | 2468 | add_pending_object(&revs, &(sb.final->object), ":"); |
cee7f245 | 2469 | } |
1cfe7733 JH |
2470 | else if (contents_from) |
2471 | die("Cannot use --contents with final commit object name"); | |
cee7f245 | 2472 | |
1732a1fd JH |
2473 | /* |
2474 | * If we have bottom, this will mark the ancestors of the | |
cee7f245 JH |
2475 | * bottom commits we would reach while traversing as |
2476 | * uninteresting. | |
2477 | */ | |
3d51e1b5 MK |
2478 | if (prepare_revision_walk(&revs)) |
2479 | die("revision walk setup failed"); | |
cee7f245 | 2480 | |
1cfe7733 JH |
2481 | if (is_null_sha1(sb.final->object.sha1)) { |
2482 | char *buf; | |
2483 | o = sb.final->util; | |
2484 | buf = xmalloc(o->file.size + 1); | |
2485 | memcpy(buf, o->file.ptr, o->file.size + 1); | |
2486 | sb.final_buf = buf; | |
2487 | sb.final_buf_size = o->file.size; | |
2488 | } | |
2489 | else { | |
2490 | o = get_origin(&sb, sb.final, path); | |
90064710 | 2491 | if (fill_blob_sha1_and_mode(o)) |
1cfe7733 | 2492 | die("no such path %s in %s", path, final_commit_name); |
cee7f245 | 2493 | |
3b8a12e8 | 2494 | if (DIFF_OPT_TST(&sb.revs->diffopt, ALLOW_TEXTCONV) && |
90064710 | 2495 | textconv_object(path, o->mode, o->blob_sha1, (char **) &sb.final_buf, |
3b8a12e8 AB |
2496 | &sb.final_buf_size)) |
2497 | ; | |
2498 | else | |
2499 | sb.final_buf = read_sha1_file(o->blob_sha1, &type, | |
2500 | &sb.final_buf_size); | |
2501 | ||
ab43e495 JH |
2502 | if (!sb.final_buf) |
2503 | die("Cannot read blob %s for path %s", | |
2504 | sha1_to_hex(o->blob_sha1), | |
2505 | path); | |
1cfe7733 | 2506 | } |
c2e525d9 | 2507 | num_read_blob++; |
cee7f245 JH |
2508 | lno = prepare_lines(&sb); |
2509 | ||
931233bc JH |
2510 | bottom = top = 0; |
2511 | if (bottomtop) | |
2512 | prepare_blame_range(&sb, bottomtop, lno, &bottom, &top); | |
2513 | if (bottom && top && top < bottom) { | |
2514 | long tmp; | |
2515 | tmp = top; top = bottom; bottom = tmp; | |
2516 | } | |
cee7f245 JH |
2517 | if (bottom < 1) |
2518 | bottom = 1; | |
2519 | if (top < 1) | |
2520 | top = lno; | |
2521 | bottom--; | |
92f9e273 | 2522 | if (lno < top || lno < bottom) |
cee7f245 JH |
2523 | die("file %s has only %lu lines", path, lno); |
2524 | ||
2525 | ent = xcalloc(1, sizeof(*ent)); | |
2526 | ent->lno = bottom; | |
2527 | ent->num_lines = top - bottom; | |
2528 | ent->suspect = o; | |
2529 | ent->s_lno = bottom; | |
2530 | ||
2531 | sb.ent = ent; | |
2532 | sb.path = path; | |
2533 | ||
d551a488 | 2534 | read_mailmap(&mailmap, NULL); |
f9567384 | 2535 | |
b92565dc MH |
2536 | if (!incremental) |
2537 | setup_pager(); | |
2538 | ||
85af7929 | 2539 | assign_blame(&sb, opt); |
cee7f245 | 2540 | |
717d1462 LT |
2541 | if (incremental) |
2542 | return 0; | |
2543 | ||
cee7f245 JH |
2544 | coalesce(&sb); |
2545 | ||
2546 | if (!(output_option & OUTPUT_PORCELAIN)) | |
2547 | find_alignment(&sb, &output_option); | |
2548 | ||
2549 | output(&sb, output_option); | |
2550 | free((void *)sb.final_buf); | |
2551 | for (ent = sb.ent; ent; ) { | |
2552 | struct blame_entry *e = ent->next; | |
2553 | free(ent); | |
2554 | ent = e; | |
2555 | } | |
c2e525d9 | 2556 | |
870b39c1 | 2557 | if (show_stats) { |
c2e525d9 JH |
2558 | printf("num read blob: %d\n", num_read_blob); |
2559 | printf("num get patch: %d\n", num_get_patch); | |
2560 | printf("num commits: %d\n", num_commits); | |
2561 | } | |
cee7f245 JH |
2562 | return 0; |
2563 | } |