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Commit | Line | Data |
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cee7f245 JH |
1 | /* |
2 | * Pickaxe | |
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" |
f9567384 JH |
19 | #include "path-list.h" |
20 | #include "mailmap.h" | |
cee7f245 | 21 | |
acca687f | 22 | static char blame_usage[] = |
b82871b3 | 23 | "git-blame [-c] [-b] [-l] [--root] [-t] [-f] [-n] [-s] [-p] [-w] [-L n,m] [-S <revs-file>] [-M] [-C] [-C] [--contents <filename>] [--incremental] [commit] [--] file\n" |
635f4a30 | 24 | " -c Use the same output mode as git-annotate (Default: off)\n" |
4c10a5ca | 25 | " -b Show blank SHA-1 for boundary commits (Default: off)\n" |
635f4a30 | 26 | " -l Show long commit SHA1 (Default: off)\n" |
4c10a5ca | 27 | " --root Do not treat root commits as boundaries (Default: off)\n" |
635f4a30 | 28 | " -t Show raw timestamp (Default: off)\n" |
cee7f245 JH |
29 | " -f, --show-name Show original filename (Default: auto)\n" |
30 | " -n, --show-number Show original linenumber (Default: off)\n" | |
093dc5be | 31 | " -s Suppress author name and timestamp (Default: off)\n" |
cee7f245 | 32 | " -p, --porcelain Show in a format designed for machine consumption\n" |
b82871b3 | 33 | " -w Ignore whitespace differences\n" |
cee7f245 | 34 | " -L n,m Process only line range n,m, counting from 1\n" |
18abd745 | 35 | " -M, -C Find line movements within and across files\n" |
717d1462 | 36 | " --incremental Show blame entries as we find them, incrementally\n" |
1cfe7733 | 37 | " --contents file Use <file>'s contents as the final image\n" |
cee7f245 JH |
38 | " -S revs-file Use revisions from revs-file instead of calling git-rev-list\n"; |
39 | ||
40 | static int longest_file; | |
41 | static int longest_author; | |
42 | static int max_orig_digits; | |
43 | static int max_digits; | |
5ff62c30 | 44 | static int max_score_digits; |
4c10a5ca JH |
45 | static int show_root; |
46 | static int blank_boundary; | |
717d1462 | 47 | static int incremental; |
e68989a7 | 48 | static int cmd_is_annotate; |
b82871b3 | 49 | static int xdl_opts = XDF_NEED_MINIMAL; |
f9567384 | 50 | static struct path_list mailmap; |
cee7f245 | 51 | |
54a4c617 JH |
52 | #ifndef DEBUG |
53 | #define DEBUG 0 | |
54 | #endif | |
55 | ||
c2e525d9 JH |
56 | /* stats */ |
57 | static int num_read_blob; | |
58 | static int num_get_patch; | |
59 | static int num_commits; | |
60 | ||
d24bba80 | 61 | #define PICKAXE_BLAME_MOVE 01 |
18abd745 JH |
62 | #define PICKAXE_BLAME_COPY 02 |
63 | #define PICKAXE_BLAME_COPY_HARDER 04 | |
c63777c0 | 64 | #define PICKAXE_BLAME_COPY_HARDEST 010 |
d24bba80 | 65 | |
4a0fc95f JH |
66 | /* |
67 | * blame for a blame_entry with score lower than these thresholds | |
68 | * is not passed to the parent using move/copy logic. | |
69 | */ | |
70 | static unsigned blame_move_score; | |
71 | static unsigned blame_copy_score; | |
72 | #define BLAME_DEFAULT_MOVE_SCORE 20 | |
73 | #define BLAME_DEFAULT_COPY_SCORE 40 | |
74 | ||
cee7f245 JH |
75 | /* bits #0..7 in revision.h, #8..11 used for merge_bases() in commit.c */ |
76 | #define METAINFO_SHOWN (1u<<12) | |
77 | #define MORE_THAN_ONE_PATH (1u<<13) | |
78 | ||
79 | /* | |
54a4c617 | 80 | * One blob in a commit that is being suspected |
cee7f245 JH |
81 | */ |
82 | struct origin { | |
54a4c617 | 83 | int refcnt; |
cee7f245 | 84 | struct commit *commit; |
c2e525d9 | 85 | mmfile_t file; |
cee7f245 JH |
86 | unsigned char blob_sha1[20]; |
87 | char path[FLEX_ARRAY]; | |
88 | }; | |
89 | ||
1732a1fd JH |
90 | /* |
91 | * Given an origin, prepare mmfile_t structure to be used by the | |
92 | * diff machinery | |
93 | */ | |
c2e525d9 JH |
94 | static char *fill_origin_blob(struct origin *o, mmfile_t *file) |
95 | { | |
96 | if (!o->file.ptr) { | |
21666f1a | 97 | enum object_type type; |
c2e525d9 | 98 | num_read_blob++; |
21666f1a | 99 | file->ptr = read_sha1_file(o->blob_sha1, &type, |
c2e525d9 | 100 | (unsigned long *)(&(file->size))); |
ab43e495 JH |
101 | if (!file->ptr) |
102 | die("Cannot read blob %s for path %s", | |
103 | sha1_to_hex(o->blob_sha1), | |
104 | o->path); | |
c2e525d9 JH |
105 | o->file = *file; |
106 | } | |
107 | else | |
108 | *file = o->file; | |
109 | return file->ptr; | |
110 | } | |
111 | ||
1732a1fd JH |
112 | /* |
113 | * Origin is refcounted and usually we keep the blob contents to be | |
114 | * reused. | |
115 | */ | |
54a4c617 JH |
116 | static inline struct origin *origin_incref(struct origin *o) |
117 | { | |
118 | if (o) | |
119 | o->refcnt++; | |
120 | return o; | |
121 | } | |
122 | ||
123 | static void origin_decref(struct origin *o) | |
124 | { | |
125 | if (o && --o->refcnt <= 0) { | |
c2e525d9 JH |
126 | if (o->file.ptr) |
127 | free(o->file.ptr); | |
54a4c617 JH |
128 | memset(o, 0, sizeof(*o)); |
129 | free(o); | |
130 | } | |
131 | } | |
132 | ||
7c3c7962 JH |
133 | static void drop_origin_blob(struct origin *o) |
134 | { | |
135 | if (o->file.ptr) { | |
136 | free(o->file.ptr); | |
137 | o->file.ptr = NULL; | |
138 | } | |
139 | } | |
140 | ||
1732a1fd JH |
141 | /* |
142 | * Each group of lines is described by a blame_entry; it can be split | |
143 | * as we pass blame to the parents. They form a linked list in the | |
144 | * scoreboard structure, sorted by the target line number. | |
145 | */ | |
cee7f245 JH |
146 | struct blame_entry { |
147 | struct blame_entry *prev; | |
148 | struct blame_entry *next; | |
149 | ||
150 | /* the first line of this group in the final image; | |
151 | * internally all line numbers are 0 based. | |
152 | */ | |
153 | int lno; | |
154 | ||
155 | /* how many lines this group has */ | |
156 | int num_lines; | |
157 | ||
158 | /* the commit that introduced this group into the final image */ | |
159 | struct origin *suspect; | |
160 | ||
161 | /* true if the suspect is truly guilty; false while we have not | |
162 | * checked if the group came from one of its parents. | |
163 | */ | |
164 | char guilty; | |
165 | ||
166 | /* the line number of the first line of this group in the | |
167 | * suspect's file; internally all line numbers are 0 based. | |
168 | */ | |
169 | int s_lno; | |
5ff62c30 JH |
170 | |
171 | /* how significant this entry is -- cached to avoid | |
1732a1fd | 172 | * scanning the lines over and over. |
5ff62c30 JH |
173 | */ |
174 | unsigned score; | |
cee7f245 JH |
175 | }; |
176 | ||
1732a1fd JH |
177 | /* |
178 | * The current state of the blame assignment. | |
179 | */ | |
cee7f245 JH |
180 | struct scoreboard { |
181 | /* the final commit (i.e. where we started digging from) */ | |
182 | struct commit *final; | |
183 | ||
184 | const char *path; | |
185 | ||
1732a1fd JH |
186 | /* |
187 | * The contents in the final image. | |
188 | * Used by many functions to obtain contents of the nth line, | |
189 | * indexed with scoreboard.lineno[blame_entry.lno]. | |
cee7f245 JH |
190 | */ |
191 | const char *final_buf; | |
192 | unsigned long final_buf_size; | |
193 | ||
194 | /* linked list of blames */ | |
195 | struct blame_entry *ent; | |
196 | ||
612702e8 | 197 | /* look-up a line in the final buffer */ |
cee7f245 JH |
198 | int num_lines; |
199 | int *lineno; | |
200 | }; | |
201 | ||
171dccd5 | 202 | static inline int same_suspect(struct origin *a, struct origin *b) |
46014766 | 203 | { |
171dccd5 | 204 | if (a == b) |
57584d9e | 205 | return 1; |
171dccd5 JH |
206 | if (a->commit != b->commit) |
207 | return 0; | |
208 | return !strcmp(a->path, b->path); | |
46014766 JH |
209 | } |
210 | ||
54a4c617 JH |
211 | static void sanity_check_refcnt(struct scoreboard *); |
212 | ||
1732a1fd JH |
213 | /* |
214 | * If two blame entries that are next to each other came from | |
215 | * contiguous lines in the same origin (i.e. <commit, path> pair), | |
216 | * merge them together. | |
217 | */ | |
cee7f245 JH |
218 | static void coalesce(struct scoreboard *sb) |
219 | { | |
220 | struct blame_entry *ent, *next; | |
221 | ||
222 | for (ent = sb->ent; ent && (next = ent->next); ent = next) { | |
171dccd5 | 223 | if (same_suspect(ent->suspect, next->suspect) && |
cee7f245 JH |
224 | ent->guilty == next->guilty && |
225 | ent->s_lno + ent->num_lines == next->s_lno) { | |
226 | ent->num_lines += next->num_lines; | |
227 | ent->next = next->next; | |
228 | if (ent->next) | |
229 | ent->next->prev = ent; | |
54a4c617 | 230 | origin_decref(next->suspect); |
cee7f245 | 231 | free(next); |
46014766 | 232 | ent->score = 0; |
cee7f245 JH |
233 | next = ent; /* again */ |
234 | } | |
235 | } | |
54a4c617 JH |
236 | |
237 | if (DEBUG) /* sanity */ | |
238 | sanity_check_refcnt(sb); | |
cee7f245 JH |
239 | } |
240 | ||
1732a1fd JH |
241 | /* |
242 | * Given a commit and a path in it, create a new origin structure. | |
243 | * The callers that add blame to the scoreboard should use | |
244 | * get_origin() to obtain shared, refcounted copy instead of calling | |
245 | * this function directly. | |
246 | */ | |
854b97f6 JH |
247 | static struct origin *make_origin(struct commit *commit, const char *path) |
248 | { | |
249 | struct origin *o; | |
250 | o = xcalloc(1, sizeof(*o) + strlen(path) + 1); | |
251 | o->commit = commit; | |
252 | o->refcnt = 1; | |
253 | strcpy(o->path, path); | |
254 | return o; | |
255 | } | |
256 | ||
1732a1fd JH |
257 | /* |
258 | * Locate an existing origin or create a new one. | |
259 | */ | |
f6c0e191 JH |
260 | static struct origin *get_origin(struct scoreboard *sb, |
261 | struct commit *commit, | |
262 | const char *path) | |
cee7f245 | 263 | { |
f6c0e191 | 264 | struct blame_entry *e; |
cee7f245 | 265 | |
f6c0e191 JH |
266 | for (e = sb->ent; e; e = e->next) { |
267 | if (e->suspect->commit == commit && | |
268 | !strcmp(e->suspect->path, path)) | |
54a4c617 | 269 | return origin_incref(e->suspect); |
cee7f245 | 270 | } |
854b97f6 | 271 | return make_origin(commit, path); |
cee7f245 JH |
272 | } |
273 | ||
1732a1fd JH |
274 | /* |
275 | * Fill the blob_sha1 field of an origin if it hasn't, so that later | |
276 | * call to fill_origin_blob() can use it to locate the data. blob_sha1 | |
277 | * for an origin is also used to pass the blame for the entire file to | |
278 | * the parent to detect the case where a child's blob is identical to | |
279 | * that of its parent's. | |
280 | */ | |
f6c0e191 JH |
281 | static int fill_blob_sha1(struct origin *origin) |
282 | { | |
283 | unsigned mode; | |
f6c0e191 JH |
284 | |
285 | if (!is_null_sha1(origin->blob_sha1)) | |
286 | return 0; | |
287 | if (get_tree_entry(origin->commit->object.sha1, | |
288 | origin->path, | |
289 | origin->blob_sha1, &mode)) | |
290 | goto error_out; | |
21666f1a | 291 | if (sha1_object_info(origin->blob_sha1, NULL) != OBJ_BLOB) |
f6c0e191 JH |
292 | goto error_out; |
293 | return 0; | |
294 | error_out: | |
295 | hashclr(origin->blob_sha1); | |
296 | return -1; | |
297 | } | |
298 | ||
1732a1fd JH |
299 | /* |
300 | * We have an origin -- check if the same path exists in the | |
301 | * parent and return an origin structure to represent it. | |
302 | */ | |
f6c0e191 | 303 | static struct origin *find_origin(struct scoreboard *sb, |
cee7f245 JH |
304 | struct commit *parent, |
305 | struct origin *origin) | |
306 | { | |
307 | struct origin *porigin = NULL; | |
308 | struct diff_options diff_opts; | |
f6c0e191 JH |
309 | const char *paths[2]; |
310 | ||
0d981c67 | 311 | if (parent->util) { |
1732a1fd JH |
312 | /* |
313 | * Each commit object can cache one origin in that | |
314 | * commit. This is a freestanding copy of origin and | |
315 | * not refcounted. | |
854b97f6 | 316 | */ |
0d981c67 | 317 | struct origin *cached = parent->util; |
854b97f6 | 318 | if (!strcmp(cached->path, origin->path)) { |
1732a1fd JH |
319 | /* |
320 | * The same path between origin and its parent | |
321 | * without renaming -- the most common case. | |
322 | */ | |
854b97f6 | 323 | porigin = get_origin(sb, parent, cached->path); |
1732a1fd JH |
324 | |
325 | /* | |
326 | * If the origin was newly created (i.e. get_origin | |
327 | * would call make_origin if none is found in the | |
328 | * scoreboard), it does not know the blob_sha1, | |
329 | * so copy it. Otherwise porigin was in the | |
330 | * scoreboard and already knows blob_sha1. | |
331 | */ | |
854b97f6 JH |
332 | if (porigin->refcnt == 1) |
333 | hashcpy(porigin->blob_sha1, cached->blob_sha1); | |
334 | return porigin; | |
335 | } | |
336 | /* otherwise it was not very useful; free it */ | |
337 | free(parent->util); | |
338 | parent->util = NULL; | |
0d981c67 JH |
339 | } |
340 | ||
f6c0e191 JH |
341 | /* See if the origin->path is different between parent |
342 | * and origin first. Most of the time they are the | |
343 | * same and diff-tree is fairly efficient about this. | |
344 | */ | |
345 | diff_setup(&diff_opts); | |
8f67f8ae | 346 | DIFF_OPT_SET(&diff_opts, RECURSIVE); |
f6c0e191 JH |
347 | diff_opts.detect_rename = 0; |
348 | diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
349 | paths[0] = origin->path; | |
350 | paths[1] = NULL; | |
351 | ||
352 | diff_tree_setup_paths(paths, &diff_opts); | |
353 | if (diff_setup_done(&diff_opts) < 0) | |
354 | die("diff-setup"); | |
1cfe7733 JH |
355 | |
356 | if (is_null_sha1(origin->commit->object.sha1)) | |
357 | do_diff_cache(parent->tree->object.sha1, &diff_opts); | |
358 | else | |
359 | diff_tree_sha1(parent->tree->object.sha1, | |
360 | origin->commit->tree->object.sha1, | |
361 | "", &diff_opts); | |
f6c0e191 JH |
362 | diffcore_std(&diff_opts); |
363 | ||
364 | /* It is either one entry that says "modified", or "created", | |
365 | * or nothing. | |
366 | */ | |
367 | if (!diff_queued_diff.nr) { | |
368 | /* The path is the same as parent */ | |
369 | porigin = get_origin(sb, parent, origin->path); | |
370 | hashcpy(porigin->blob_sha1, origin->blob_sha1); | |
371 | } | |
372 | else if (diff_queued_diff.nr != 1) | |
acca687f | 373 | die("internal error in blame::find_origin"); |
f6c0e191 JH |
374 | else { |
375 | struct diff_filepair *p = diff_queued_diff.queue[0]; | |
376 | switch (p->status) { | |
377 | default: | |
acca687f | 378 | die("internal error in blame::find_origin (%c)", |
f6c0e191 JH |
379 | p->status); |
380 | case 'M': | |
381 | porigin = get_origin(sb, parent, origin->path); | |
382 | hashcpy(porigin->blob_sha1, p->one->sha1); | |
383 | break; | |
384 | case 'A': | |
385 | case 'T': | |
386 | /* Did not exist in parent, or type changed */ | |
387 | break; | |
388 | } | |
389 | } | |
390 | diff_flush(&diff_opts); | |
03b69c76 | 391 | diff_tree_release_paths(&diff_opts); |
0d981c67 | 392 | if (porigin) { |
1732a1fd JH |
393 | /* |
394 | * Create a freestanding copy that is not part of | |
395 | * the refcounted origin found in the scoreboard, and | |
396 | * cache it in the commit. | |
397 | */ | |
854b97f6 | 398 | struct origin *cached; |
1732a1fd | 399 | |
854b97f6 JH |
400 | cached = make_origin(porigin->commit, porigin->path); |
401 | hashcpy(cached->blob_sha1, porigin->blob_sha1); | |
402 | parent->util = cached; | |
0d981c67 | 403 | } |
f69e743d JH |
404 | return porigin; |
405 | } | |
f6c0e191 | 406 | |
1732a1fd JH |
407 | /* |
408 | * We have an origin -- find the path that corresponds to it in its | |
409 | * parent and return an origin structure to represent it. | |
410 | */ | |
f69e743d JH |
411 | static struct origin *find_rename(struct scoreboard *sb, |
412 | struct commit *parent, | |
413 | struct origin *origin) | |
414 | { | |
415 | struct origin *porigin = NULL; | |
416 | struct diff_options diff_opts; | |
417 | int i; | |
418 | const char *paths[2]; | |
cee7f245 JH |
419 | |
420 | diff_setup(&diff_opts); | |
8f67f8ae | 421 | DIFF_OPT_SET(&diff_opts, RECURSIVE); |
cee7f245 JH |
422 | diff_opts.detect_rename = DIFF_DETECT_RENAME; |
423 | diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
2f3f8b21 | 424 | diff_opts.single_follow = origin->path; |
cee7f245 JH |
425 | paths[0] = NULL; |
426 | diff_tree_setup_paths(paths, &diff_opts); | |
427 | if (diff_setup_done(&diff_opts) < 0) | |
428 | die("diff-setup"); | |
1cfe7733 JH |
429 | |
430 | if (is_null_sha1(origin->commit->object.sha1)) | |
431 | do_diff_cache(parent->tree->object.sha1, &diff_opts); | |
432 | else | |
433 | diff_tree_sha1(parent->tree->object.sha1, | |
434 | origin->commit->tree->object.sha1, | |
435 | "", &diff_opts); | |
cee7f245 JH |
436 | diffcore_std(&diff_opts); |
437 | ||
438 | for (i = 0; i < diff_queued_diff.nr; i++) { | |
439 | struct diff_filepair *p = diff_queued_diff.queue[i]; | |
612702e8 | 440 | if ((p->status == 'R' || p->status == 'C') && |
f6c0e191 JH |
441 | !strcmp(p->two->path, origin->path)) { |
442 | porigin = get_origin(sb, parent, p->one->path); | |
443 | hashcpy(porigin->blob_sha1, p->one->sha1); | |
cee7f245 JH |
444 | break; |
445 | } | |
446 | } | |
447 | diff_flush(&diff_opts); | |
03b69c76 | 448 | diff_tree_release_paths(&diff_opts); |
cee7f245 JH |
449 | return porigin; |
450 | } | |
451 | ||
1732a1fd JH |
452 | /* |
453 | * Parsing of patch chunks... | |
454 | */ | |
cee7f245 JH |
455 | struct chunk { |
456 | /* line number in postimage; up to but not including this | |
457 | * line is the same as preimage | |
458 | */ | |
459 | int same; | |
460 | ||
461 | /* preimage line number after this chunk */ | |
462 | int p_next; | |
463 | ||
464 | /* postimage line number after this chunk */ | |
465 | int t_next; | |
466 | }; | |
467 | ||
468 | struct patch { | |
469 | struct chunk *chunks; | |
470 | int num; | |
471 | }; | |
472 | ||
473 | struct blame_diff_state { | |
474 | struct xdiff_emit_state xm; | |
475 | struct patch *ret; | |
476 | unsigned hunk_post_context; | |
477 | unsigned hunk_in_pre_context : 1; | |
478 | }; | |
479 | ||
480 | static void process_u_diff(void *state_, char *line, unsigned long len) | |
481 | { | |
482 | struct blame_diff_state *state = state_; | |
483 | struct chunk *chunk; | |
484 | int off1, off2, len1, len2, num; | |
485 | ||
cee7f245 JH |
486 | num = state->ret->num; |
487 | if (len < 4 || line[0] != '@' || line[1] != '@') { | |
488 | if (state->hunk_in_pre_context && line[0] == ' ') | |
489 | state->ret->chunks[num - 1].same++; | |
490 | else { | |
491 | state->hunk_in_pre_context = 0; | |
492 | if (line[0] == ' ') | |
493 | state->hunk_post_context++; | |
494 | else | |
495 | state->hunk_post_context = 0; | |
496 | } | |
497 | return; | |
498 | } | |
499 | ||
500 | if (num && state->hunk_post_context) { | |
501 | chunk = &state->ret->chunks[num - 1]; | |
502 | chunk->p_next -= state->hunk_post_context; | |
503 | chunk->t_next -= state->hunk_post_context; | |
504 | } | |
505 | state->ret->num = ++num; | |
506 | state->ret->chunks = xrealloc(state->ret->chunks, | |
507 | sizeof(struct chunk) * num); | |
508 | chunk = &state->ret->chunks[num - 1]; | |
509 | if (parse_hunk_header(line, len, &off1, &len1, &off2, &len2)) { | |
510 | state->ret->num--; | |
511 | return; | |
512 | } | |
513 | ||
514 | /* Line numbers in patch output are one based. */ | |
515 | off1--; | |
516 | off2--; | |
517 | ||
518 | chunk->same = len2 ? off2 : (off2 + 1); | |
519 | ||
520 | chunk->p_next = off1 + (len1 ? len1 : 1); | |
521 | chunk->t_next = chunk->same + len2; | |
522 | state->hunk_in_pre_context = 1; | |
523 | state->hunk_post_context = 0; | |
524 | } | |
525 | ||
526 | static struct patch *compare_buffer(mmfile_t *file_p, mmfile_t *file_o, | |
527 | int context) | |
528 | { | |
529 | struct blame_diff_state state; | |
530 | xpparam_t xpp; | |
531 | xdemitconf_t xecfg; | |
532 | xdemitcb_t ecb; | |
533 | ||
b82871b3 | 534 | xpp.flags = xdl_opts; |
30b25010 | 535 | memset(&xecfg, 0, sizeof(xecfg)); |
cee7f245 | 536 | xecfg.ctxlen = context; |
cee7f245 JH |
537 | ecb.outf = xdiff_outf; |
538 | ecb.priv = &state; | |
539 | memset(&state, 0, sizeof(state)); | |
540 | state.xm.consume = process_u_diff; | |
541 | state.ret = xmalloc(sizeof(struct patch)); | |
542 | state.ret->chunks = NULL; | |
543 | state.ret->num = 0; | |
544 | ||
c279d7e9 | 545 | xdi_diff(file_p, file_o, &xpp, &xecfg, &ecb); |
cee7f245 JH |
546 | |
547 | if (state.ret->num) { | |
548 | struct chunk *chunk; | |
549 | chunk = &state.ret->chunks[state.ret->num - 1]; | |
550 | chunk->p_next -= state.hunk_post_context; | |
551 | chunk->t_next -= state.hunk_post_context; | |
552 | } | |
553 | return state.ret; | |
554 | } | |
555 | ||
1732a1fd JH |
556 | /* |
557 | * Run diff between two origins and grab the patch output, so that | |
558 | * we can pass blame for lines origin is currently suspected for | |
559 | * to its parent. | |
560 | */ | |
cee7f245 JH |
561 | static struct patch *get_patch(struct origin *parent, struct origin *origin) |
562 | { | |
563 | mmfile_t file_p, file_o; | |
cee7f245 JH |
564 | struct patch *patch; |
565 | ||
c2e525d9 JH |
566 | fill_origin_blob(parent, &file_p); |
567 | fill_origin_blob(origin, &file_o); | |
568 | if (!file_p.ptr || !file_o.ptr) | |
cee7f245 | 569 | return NULL; |
cee7f245 | 570 | patch = compare_buffer(&file_p, &file_o, 0); |
c2e525d9 | 571 | num_get_patch++; |
cee7f245 JH |
572 | return patch; |
573 | } | |
574 | ||
575 | static void free_patch(struct patch *p) | |
576 | { | |
577 | free(p->chunks); | |
578 | free(p); | |
579 | } | |
580 | ||
1732a1fd | 581 | /* |
3dff5379 | 582 | * Link in a new blame entry to the scoreboard. Entries that cover the |
1732a1fd JH |
583 | * same line range have been removed from the scoreboard previously. |
584 | */ | |
cee7f245 JH |
585 | static void add_blame_entry(struct scoreboard *sb, struct blame_entry *e) |
586 | { | |
587 | struct blame_entry *ent, *prev = NULL; | |
588 | ||
54a4c617 JH |
589 | origin_incref(e->suspect); |
590 | ||
cee7f245 JH |
591 | for (ent = sb->ent; ent && ent->lno < e->lno; ent = ent->next) |
592 | prev = ent; | |
593 | ||
594 | /* prev, if not NULL, is the last one that is below e */ | |
595 | e->prev = prev; | |
596 | if (prev) { | |
597 | e->next = prev->next; | |
598 | prev->next = e; | |
599 | } | |
600 | else { | |
601 | e->next = sb->ent; | |
602 | sb->ent = e; | |
603 | } | |
604 | if (e->next) | |
605 | e->next->prev = e; | |
606 | } | |
607 | ||
1732a1fd JH |
608 | /* |
609 | * src typically is on-stack; we want to copy the information in it to | |
610 | * an malloced blame_entry that is already on the linked list of the | |
611 | * scoreboard. The origin of dst loses a refcnt while the origin of src | |
612 | * gains one. | |
613 | */ | |
cee7f245 JH |
614 | static void dup_entry(struct blame_entry *dst, struct blame_entry *src) |
615 | { | |
616 | struct blame_entry *p, *n; | |
54a4c617 | 617 | |
cee7f245 JH |
618 | p = dst->prev; |
619 | n = dst->next; | |
54a4c617 JH |
620 | origin_incref(src->suspect); |
621 | origin_decref(dst->suspect); | |
cee7f245 JH |
622 | memcpy(dst, src, sizeof(*src)); |
623 | dst->prev = p; | |
624 | dst->next = n; | |
5ff62c30 | 625 | dst->score = 0; |
cee7f245 JH |
626 | } |
627 | ||
628 | static const char *nth_line(struct scoreboard *sb, int lno) | |
629 | { | |
630 | return sb->final_buf + sb->lineno[lno]; | |
631 | } | |
632 | ||
1732a1fd JH |
633 | /* |
634 | * It is known that lines between tlno to same came from parent, and e | |
635 | * has an overlap with that range. it also is known that parent's | |
636 | * line plno corresponds to e's line tlno. | |
637 | * | |
638 | * <---- e -----> | |
639 | * <------> | |
640 | * <------------> | |
641 | * <------------> | |
642 | * <------------------> | |
643 | * | |
644 | * Split e into potentially three parts; before this chunk, the chunk | |
645 | * to be blamed for the parent, and after that portion. | |
646 | */ | |
54a4c617 | 647 | static void split_overlap(struct blame_entry *split, |
cee7f245 JH |
648 | struct blame_entry *e, |
649 | int tlno, int plno, int same, | |
650 | struct origin *parent) | |
651 | { | |
cee7f245 JH |
652 | int chunk_end_lno; |
653 | memset(split, 0, sizeof(struct blame_entry [3])); | |
654 | ||
655 | if (e->s_lno < tlno) { | |
656 | /* there is a pre-chunk part not blamed on parent */ | |
54a4c617 | 657 | split[0].suspect = origin_incref(e->suspect); |
cee7f245 JH |
658 | split[0].lno = e->lno; |
659 | split[0].s_lno = e->s_lno; | |
660 | split[0].num_lines = tlno - e->s_lno; | |
661 | split[1].lno = e->lno + tlno - e->s_lno; | |
662 | split[1].s_lno = plno; | |
663 | } | |
664 | else { | |
665 | split[1].lno = e->lno; | |
666 | split[1].s_lno = plno + (e->s_lno - tlno); | |
667 | } | |
668 | ||
669 | if (same < e->s_lno + e->num_lines) { | |
670 | /* there is a post-chunk part not blamed on parent */ | |
54a4c617 | 671 | split[2].suspect = origin_incref(e->suspect); |
cee7f245 JH |
672 | split[2].lno = e->lno + (same - e->s_lno); |
673 | split[2].s_lno = e->s_lno + (same - e->s_lno); | |
674 | split[2].num_lines = e->s_lno + e->num_lines - same; | |
675 | chunk_end_lno = split[2].lno; | |
676 | } | |
677 | else | |
678 | chunk_end_lno = e->lno + e->num_lines; | |
679 | split[1].num_lines = chunk_end_lno - split[1].lno; | |
680 | ||
1732a1fd JH |
681 | /* |
682 | * if it turns out there is nothing to blame the parent for, | |
683 | * forget about the splitting. !split[1].suspect signals this. | |
684 | */ | |
cee7f245 JH |
685 | if (split[1].num_lines < 1) |
686 | return; | |
54a4c617 | 687 | split[1].suspect = origin_incref(parent); |
cee7f245 JH |
688 | } |
689 | ||
1732a1fd JH |
690 | /* |
691 | * split_overlap() divided an existing blame e into up to three parts | |
692 | * in split. Adjust the linked list of blames in the scoreboard to | |
693 | * reflect the split. | |
694 | */ | |
cee7f245 | 695 | static void split_blame(struct scoreboard *sb, |
54a4c617 | 696 | struct blame_entry *split, |
cee7f245 JH |
697 | struct blame_entry *e) |
698 | { | |
699 | struct blame_entry *new_entry; | |
700 | ||
701 | if (split[0].suspect && split[2].suspect) { | |
1732a1fd | 702 | /* The first part (reuse storage for the existing entry e) */ |
cee7f245 JH |
703 | dup_entry(e, &split[0]); |
704 | ||
1732a1fd | 705 | /* The last part -- me */ |
cee7f245 JH |
706 | new_entry = xmalloc(sizeof(*new_entry)); |
707 | memcpy(new_entry, &(split[2]), sizeof(struct blame_entry)); | |
708 | add_blame_entry(sb, new_entry); | |
709 | ||
1732a1fd | 710 | /* ... and the middle part -- parent */ |
cee7f245 JH |
711 | new_entry = xmalloc(sizeof(*new_entry)); |
712 | memcpy(new_entry, &(split[1]), sizeof(struct blame_entry)); | |
713 | add_blame_entry(sb, new_entry); | |
714 | } | |
715 | else if (!split[0].suspect && !split[2].suspect) | |
1732a1fd JH |
716 | /* |
717 | * The parent covers the entire area; reuse storage for | |
718 | * e and replace it with the parent. | |
719 | */ | |
cee7f245 JH |
720 | dup_entry(e, &split[1]); |
721 | else if (split[0].suspect) { | |
1732a1fd | 722 | /* me and then parent */ |
cee7f245 JH |
723 | dup_entry(e, &split[0]); |
724 | ||
725 | new_entry = xmalloc(sizeof(*new_entry)); | |
726 | memcpy(new_entry, &(split[1]), sizeof(struct blame_entry)); | |
727 | add_blame_entry(sb, new_entry); | |
728 | } | |
729 | else { | |
1732a1fd | 730 | /* parent and then me */ |
cee7f245 JH |
731 | dup_entry(e, &split[1]); |
732 | ||
733 | new_entry = xmalloc(sizeof(*new_entry)); | |
734 | memcpy(new_entry, &(split[2]), sizeof(struct blame_entry)); | |
735 | add_blame_entry(sb, new_entry); | |
736 | } | |
737 | ||
54a4c617 | 738 | if (DEBUG) { /* sanity */ |
cee7f245 | 739 | struct blame_entry *ent; |
612702e8 | 740 | int lno = sb->ent->lno, corrupt = 0; |
cee7f245 JH |
741 | |
742 | for (ent = sb->ent; ent; ent = ent->next) { | |
743 | if (lno != ent->lno) | |
744 | corrupt = 1; | |
745 | if (ent->s_lno < 0) | |
746 | corrupt = 1; | |
747 | lno += ent->num_lines; | |
748 | } | |
749 | if (corrupt) { | |
612702e8 | 750 | lno = sb->ent->lno; |
cee7f245 JH |
751 | for (ent = sb->ent; ent; ent = ent->next) { |
752 | printf("L %8d l %8d n %8d\n", | |
753 | lno, ent->lno, ent->num_lines); | |
754 | lno = ent->lno + ent->num_lines; | |
755 | } | |
756 | die("oops"); | |
757 | } | |
758 | } | |
759 | } | |
760 | ||
1732a1fd JH |
761 | /* |
762 | * After splitting the blame, the origins used by the | |
763 | * on-stack blame_entry should lose one refcnt each. | |
764 | */ | |
54a4c617 JH |
765 | static void decref_split(struct blame_entry *split) |
766 | { | |
767 | int i; | |
768 | ||
769 | for (i = 0; i < 3; i++) | |
770 | origin_decref(split[i].suspect); | |
771 | } | |
772 | ||
1732a1fd JH |
773 | /* |
774 | * Helper for blame_chunk(). blame_entry e is known to overlap with | |
775 | * the patch hunk; split it and pass blame to the parent. | |
776 | */ | |
cee7f245 JH |
777 | static void blame_overlap(struct scoreboard *sb, struct blame_entry *e, |
778 | int tlno, int plno, int same, | |
779 | struct origin *parent) | |
780 | { | |
781 | struct blame_entry split[3]; | |
782 | ||
783 | split_overlap(split, e, tlno, plno, same, parent); | |
54a4c617 JH |
784 | if (split[1].suspect) |
785 | split_blame(sb, split, e); | |
786 | decref_split(split); | |
cee7f245 JH |
787 | } |
788 | ||
1732a1fd JH |
789 | /* |
790 | * Find the line number of the last line the target is suspected for. | |
791 | */ | |
cee7f245 JH |
792 | static int find_last_in_target(struct scoreboard *sb, struct origin *target) |
793 | { | |
794 | struct blame_entry *e; | |
795 | int last_in_target = -1; | |
796 | ||
797 | for (e = sb->ent; e; e = e->next) { | |
171dccd5 | 798 | if (e->guilty || !same_suspect(e->suspect, target)) |
cee7f245 JH |
799 | continue; |
800 | if (last_in_target < e->s_lno + e->num_lines) | |
801 | last_in_target = e->s_lno + e->num_lines; | |
802 | } | |
803 | return last_in_target; | |
804 | } | |
805 | ||
1732a1fd JH |
806 | /* |
807 | * Process one hunk from the patch between the current suspect for | |
808 | * blame_entry e and its parent. Find and split the overlap, and | |
809 | * pass blame to the overlapping part to the parent. | |
810 | */ | |
cee7f245 JH |
811 | static void blame_chunk(struct scoreboard *sb, |
812 | int tlno, int plno, int same, | |
813 | struct origin *target, struct origin *parent) | |
814 | { | |
612702e8 | 815 | struct blame_entry *e; |
cee7f245 | 816 | |
612702e8 | 817 | for (e = sb->ent; e; e = e->next) { |
171dccd5 | 818 | if (e->guilty || !same_suspect(e->suspect, target)) |
cee7f245 JH |
819 | continue; |
820 | if (same <= e->s_lno) | |
821 | continue; | |
822 | if (tlno < e->s_lno + e->num_lines) | |
823 | blame_overlap(sb, e, tlno, plno, same, parent); | |
824 | } | |
825 | } | |
826 | ||
1732a1fd JH |
827 | /* |
828 | * We are looking at the origin 'target' and aiming to pass blame | |
829 | * for the lines it is suspected to its parent. Run diff to find | |
830 | * which lines came from parent and pass blame for them. | |
831 | */ | |
cee7f245 JH |
832 | static int pass_blame_to_parent(struct scoreboard *sb, |
833 | struct origin *target, | |
834 | struct origin *parent) | |
835 | { | |
836 | int i, last_in_target, plno, tlno; | |
837 | struct patch *patch; | |
838 | ||
839 | last_in_target = find_last_in_target(sb, target); | |
840 | if (last_in_target < 0) | |
841 | return 1; /* nothing remains for this target */ | |
842 | ||
843 | patch = get_patch(parent, target); | |
844 | plno = tlno = 0; | |
845 | for (i = 0; i < patch->num; i++) { | |
846 | struct chunk *chunk = &patch->chunks[i]; | |
847 | ||
cee7f245 JH |
848 | blame_chunk(sb, tlno, plno, chunk->same, target, parent); |
849 | plno = chunk->p_next; | |
850 | tlno = chunk->t_next; | |
851 | } | |
1732a1fd | 852 | /* The rest (i.e. anything after tlno) are the same as the parent */ |
cee7f245 JH |
853 | blame_chunk(sb, tlno, plno, last_in_target, target, parent); |
854 | ||
855 | free_patch(patch); | |
856 | return 0; | |
857 | } | |
858 | ||
1732a1fd JH |
859 | /* |
860 | * The lines in blame_entry after splitting blames many times can become | |
861 | * very small and trivial, and at some point it becomes pointless to | |
862 | * blame the parents. E.g. "\t\t}\n\t}\n\n" appears everywhere in any | |
863 | * ordinary C program, and it is not worth to say it was copied from | |
864 | * totally unrelated file in the parent. | |
865 | * | |
866 | * Compute how trivial the lines in the blame_entry are. | |
867 | */ | |
5ff62c30 JH |
868 | static unsigned ent_score(struct scoreboard *sb, struct blame_entry *e) |
869 | { | |
870 | unsigned score; | |
871 | const char *cp, *ep; | |
872 | ||
873 | if (e->score) | |
874 | return e->score; | |
875 | ||
612702e8 | 876 | score = 1; |
5ff62c30 JH |
877 | cp = nth_line(sb, e->lno); |
878 | ep = nth_line(sb, e->lno + e->num_lines); | |
879 | while (cp < ep) { | |
880 | unsigned ch = *((unsigned char *)cp); | |
881 | if (isalnum(ch)) | |
882 | score++; | |
883 | cp++; | |
884 | } | |
885 | e->score = score; | |
886 | return score; | |
887 | } | |
888 | ||
1732a1fd JH |
889 | /* |
890 | * best_so_far[] and this[] are both a split of an existing blame_entry | |
891 | * that passes blame to the parent. Maintain best_so_far the best split | |
892 | * so far, by comparing this and best_so_far and copying this into | |
893 | * bst_so_far as needed. | |
894 | */ | |
5ff62c30 | 895 | static void copy_split_if_better(struct scoreboard *sb, |
54a4c617 JH |
896 | struct blame_entry *best_so_far, |
897 | struct blame_entry *this) | |
d24bba80 | 898 | { |
54a4c617 JH |
899 | int i; |
900 | ||
d24bba80 JH |
901 | if (!this[1].suspect) |
902 | return; | |
5ff62c30 JH |
903 | if (best_so_far[1].suspect) { |
904 | if (ent_score(sb, &this[1]) < ent_score(sb, &best_so_far[1])) | |
905 | return; | |
906 | } | |
54a4c617 JH |
907 | |
908 | for (i = 0; i < 3; i++) | |
909 | origin_incref(this[i].suspect); | |
910 | decref_split(best_so_far); | |
d24bba80 JH |
911 | memcpy(best_so_far, this, sizeof(struct blame_entry [3])); |
912 | } | |
913 | ||
dd166aa8 JH |
914 | /* |
915 | * We are looking at a part of the final image represented by | |
916 | * ent (tlno and same are offset by ent->s_lno). | |
917 | * tlno is where we are looking at in the final image. | |
918 | * up to (but not including) same match preimage. | |
919 | * plno is where we are looking at in the preimage. | |
920 | * | |
921 | * <-------------- final image ----------------------> | |
922 | * <------ent------> | |
923 | * ^tlno ^same | |
924 | * <---------preimage-----> | |
925 | * ^plno | |
926 | * | |
927 | * All line numbers are 0-based. | |
928 | */ | |
929 | static void handle_split(struct scoreboard *sb, | |
930 | struct blame_entry *ent, | |
931 | int tlno, int plno, int same, | |
932 | struct origin *parent, | |
933 | struct blame_entry *split) | |
934 | { | |
935 | if (ent->num_lines <= tlno) | |
936 | return; | |
937 | if (tlno < same) { | |
938 | struct blame_entry this[3]; | |
939 | tlno += ent->s_lno; | |
940 | same += ent->s_lno; | |
941 | split_overlap(this, ent, tlno, plno, same, parent); | |
942 | copy_split_if_better(sb, split, this); | |
943 | decref_split(this); | |
944 | } | |
945 | } | |
946 | ||
1732a1fd JH |
947 | /* |
948 | * Find the lines from parent that are the same as ent so that | |
949 | * we can pass blames to it. file_p has the blob contents for | |
950 | * the parent. | |
951 | */ | |
d24bba80 JH |
952 | static void find_copy_in_blob(struct scoreboard *sb, |
953 | struct blame_entry *ent, | |
954 | struct origin *parent, | |
54a4c617 | 955 | struct blame_entry *split, |
d24bba80 JH |
956 | mmfile_t *file_p) |
957 | { | |
958 | const char *cp; | |
959 | int cnt; | |
960 | mmfile_t file_o; | |
961 | struct patch *patch; | |
962 | int i, plno, tlno; | |
963 | ||
1732a1fd JH |
964 | /* |
965 | * Prepare mmfile that contains only the lines in ent. | |
966 | */ | |
d24bba80 JH |
967 | cp = nth_line(sb, ent->lno); |
968 | file_o.ptr = (char*) cp; | |
969 | cnt = ent->num_lines; | |
970 | ||
971 | while (cnt && cp < sb->final_buf + sb->final_buf_size) { | |
972 | if (*cp++ == '\n') | |
973 | cnt--; | |
974 | } | |
975 | file_o.size = cp - file_o.ptr; | |
976 | ||
977 | patch = compare_buffer(file_p, &file_o, 1); | |
978 | ||
dd166aa8 JH |
979 | /* |
980 | * file_o is a part of final image we are annotating. | |
981 | * file_p partially may match that image. | |
982 | */ | |
d24bba80 JH |
983 | memset(split, 0, sizeof(struct blame_entry [3])); |
984 | plno = tlno = 0; | |
985 | for (i = 0; i < patch->num; i++) { | |
986 | struct chunk *chunk = &patch->chunks[i]; | |
987 | ||
dd166aa8 | 988 | handle_split(sb, ent, tlno, plno, chunk->same, parent, split); |
d24bba80 JH |
989 | plno = chunk->p_next; |
990 | tlno = chunk->t_next; | |
991 | } | |
dd166aa8 JH |
992 | /* remainder, if any, all match the preimage */ |
993 | handle_split(sb, ent, tlno, plno, ent->num_lines, parent, split); | |
d24bba80 JH |
994 | free_patch(patch); |
995 | } | |
996 | ||
1732a1fd JH |
997 | /* |
998 | * See if lines currently target is suspected for can be attributed to | |
999 | * parent. | |
1000 | */ | |
d24bba80 JH |
1001 | static int find_move_in_parent(struct scoreboard *sb, |
1002 | struct origin *target, | |
1003 | struct origin *parent) | |
1004 | { | |
650e2f67 | 1005 | int last_in_target, made_progress; |
46014766 | 1006 | struct blame_entry *e, split[3]; |
d24bba80 | 1007 | mmfile_t file_p; |
d24bba80 JH |
1008 | |
1009 | last_in_target = find_last_in_target(sb, target); | |
1010 | if (last_in_target < 0) | |
1011 | return 1; /* nothing remains for this target */ | |
1012 | ||
c2e525d9 JH |
1013 | fill_origin_blob(parent, &file_p); |
1014 | if (!file_p.ptr) | |
d24bba80 | 1015 | return 0; |
d24bba80 | 1016 | |
650e2f67 JH |
1017 | made_progress = 1; |
1018 | while (made_progress) { | |
1019 | made_progress = 0; | |
1020 | for (e = sb->ent; e; e = e->next) { | |
171dccd5 | 1021 | if (e->guilty || !same_suspect(e->suspect, target)) |
650e2f67 JH |
1022 | continue; |
1023 | find_copy_in_blob(sb, e, parent, split, &file_p); | |
1024 | if (split[1].suspect && | |
1025 | blame_move_score < ent_score(sb, &split[1])) { | |
1026 | split_blame(sb, split, e); | |
1027 | made_progress = 1; | |
1028 | } | |
1029 | decref_split(split); | |
1030 | } | |
d24bba80 | 1031 | } |
d24bba80 JH |
1032 | return 0; |
1033 | } | |
1034 | ||
33494784 JH |
1035 | struct blame_list { |
1036 | struct blame_entry *ent; | |
1037 | struct blame_entry split[3]; | |
1038 | }; | |
1039 | ||
1732a1fd JH |
1040 | /* |
1041 | * Count the number of entries the target is suspected for, | |
1042 | * and prepare a list of entry and the best split. | |
1043 | */ | |
33494784 JH |
1044 | static struct blame_list *setup_blame_list(struct scoreboard *sb, |
1045 | struct origin *target, | |
1046 | int *num_ents_p) | |
1047 | { | |
1048 | struct blame_entry *e; | |
1049 | int num_ents, i; | |
1050 | struct blame_list *blame_list = NULL; | |
1051 | ||
33494784 | 1052 | for (e = sb->ent, num_ents = 0; e; e = e->next) |
171dccd5 | 1053 | if (!e->guilty && same_suspect(e->suspect, target)) |
33494784 JH |
1054 | num_ents++; |
1055 | if (num_ents) { | |
1056 | blame_list = xcalloc(num_ents, sizeof(struct blame_list)); | |
1057 | for (e = sb->ent, i = 0; e; e = e->next) | |
171dccd5 | 1058 | if (!e->guilty && same_suspect(e->suspect, target)) |
33494784 JH |
1059 | blame_list[i++].ent = e; |
1060 | } | |
1061 | *num_ents_p = num_ents; | |
1062 | return blame_list; | |
1063 | } | |
1064 | ||
1732a1fd JH |
1065 | /* |
1066 | * For lines target is suspected for, see if we can find code movement | |
1067 | * across file boundary from the parent commit. porigin is the path | |
1068 | * in the parent we already tried. | |
1069 | */ | |
18abd745 JH |
1070 | static int find_copy_in_parent(struct scoreboard *sb, |
1071 | struct origin *target, | |
1072 | struct commit *parent, | |
1073 | struct origin *porigin, | |
1074 | int opt) | |
1075 | { | |
1076 | struct diff_options diff_opts; | |
1077 | const char *paths[1]; | |
aec8fa1f | 1078 | int i, j; |
33494784 JH |
1079 | int retval; |
1080 | struct blame_list *blame_list; | |
aec8fa1f | 1081 | int num_ents; |
18abd745 | 1082 | |
33494784 JH |
1083 | blame_list = setup_blame_list(sb, target, &num_ents); |
1084 | if (!blame_list) | |
18abd745 JH |
1085 | return 1; /* nothing remains for this target */ |
1086 | ||
1087 | diff_setup(&diff_opts); | |
8f67f8ae | 1088 | DIFF_OPT_SET(&diff_opts, RECURSIVE); |
18abd745 JH |
1089 | diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT; |
1090 | ||
18abd745 JH |
1091 | paths[0] = NULL; |
1092 | diff_tree_setup_paths(paths, &diff_opts); | |
1093 | if (diff_setup_done(&diff_opts) < 0) | |
1094 | die("diff-setup"); | |
33494784 JH |
1095 | |
1096 | /* Try "find copies harder" on new path if requested; | |
1097 | * we do not want to use diffcore_rename() actually to | |
1098 | * match things up; find_copies_harder is set only to | |
1099 | * force diff_tree_sha1() to feed all filepairs to diff_queue, | |
1100 | * and this code needs to be after diff_setup_done(), which | |
1101 | * usually makes find-copies-harder imply copy detection. | |
1102 | */ | |
c63777c0 JH |
1103 | if ((opt & PICKAXE_BLAME_COPY_HARDEST) |
1104 | || ((opt & PICKAXE_BLAME_COPY_HARDER) | |
1105 | && (!porigin || strcmp(target->path, porigin->path)))) | |
8f67f8ae | 1106 | DIFF_OPT_SET(&diff_opts, FIND_COPIES_HARDER); |
33494784 | 1107 | |
1cfe7733 JH |
1108 | if (is_null_sha1(target->commit->object.sha1)) |
1109 | do_diff_cache(parent->tree->object.sha1, &diff_opts); | |
1110 | else | |
1111 | diff_tree_sha1(parent->tree->object.sha1, | |
1112 | target->commit->tree->object.sha1, | |
1113 | "", &diff_opts); | |
18abd745 | 1114 | |
8f67f8ae | 1115 | if (!DIFF_OPT_TST(&diff_opts, FIND_COPIES_HARDER)) |
33494784 | 1116 | diffcore_std(&diff_opts); |
18abd745 | 1117 | |
33494784 JH |
1118 | retval = 0; |
1119 | while (1) { | |
1120 | int made_progress = 0; | |
1121 | ||
1122 | for (i = 0; i < diff_queued_diff.nr; i++) { | |
1123 | struct diff_filepair *p = diff_queued_diff.queue[i]; | |
1124 | struct origin *norigin; | |
1125 | mmfile_t file_p; | |
33494784 JH |
1126 | struct blame_entry this[3]; |
1127 | ||
1128 | if (!DIFF_FILE_VALID(p->one)) | |
1129 | continue; /* does not exist in parent */ | |
1130 | if (porigin && !strcmp(p->one->path, porigin->path)) | |
1131 | /* find_move already dealt with this path */ | |
1132 | continue; | |
1133 | ||
1134 | norigin = get_origin(sb, parent, p->one->path); | |
1135 | hashcpy(norigin->blob_sha1, p->one->sha1); | |
c2e525d9 | 1136 | fill_origin_blob(norigin, &file_p); |
33494784 JH |
1137 | if (!file_p.ptr) |
1138 | continue; | |
1139 | ||
1140 | for (j = 0; j < num_ents; j++) { | |
1141 | find_copy_in_blob(sb, blame_list[j].ent, | |
1142 | norigin, this, &file_p); | |
1143 | copy_split_if_better(sb, blame_list[j].split, | |
1144 | this); | |
1145 | decref_split(this); | |
1146 | } | |
33494784 JH |
1147 | origin_decref(norigin); |
1148 | } | |
18abd745 | 1149 | |
aec8fa1f | 1150 | for (j = 0; j < num_ents; j++) { |
33494784 JH |
1151 | struct blame_entry *split = blame_list[j].split; |
1152 | if (split[1].suspect && | |
1153 | blame_copy_score < ent_score(sb, &split[1])) { | |
1154 | split_blame(sb, split, blame_list[j].ent); | |
1155 | made_progress = 1; | |
1156 | } | |
1157 | decref_split(split); | |
18abd745 | 1158 | } |
33494784 | 1159 | free(blame_list); |
aec8fa1f | 1160 | |
33494784 JH |
1161 | if (!made_progress) |
1162 | break; | |
1163 | blame_list = setup_blame_list(sb, target, &num_ents); | |
1164 | if (!blame_list) { | |
1165 | retval = 1; | |
1166 | break; | |
1167 | } | |
18abd745 | 1168 | } |
33494784 | 1169 | diff_flush(&diff_opts); |
03b69c76 | 1170 | diff_tree_release_paths(&diff_opts); |
33494784 | 1171 | return retval; |
18abd745 JH |
1172 | } |
1173 | ||
1732a1fd JH |
1174 | /* |
1175 | * The blobs of origin and porigin exactly match, so everything | |
c2e525d9 JH |
1176 | * origin is suspected for can be blamed on the parent. |
1177 | */ | |
1178 | static void pass_whole_blame(struct scoreboard *sb, | |
1179 | struct origin *origin, struct origin *porigin) | |
1180 | { | |
1181 | struct blame_entry *e; | |
1182 | ||
1183 | if (!porigin->file.ptr && origin->file.ptr) { | |
1184 | /* Steal its file */ | |
1185 | porigin->file = origin->file; | |
1186 | origin->file.ptr = NULL; | |
1187 | } | |
1188 | for (e = sb->ent; e; e = e->next) { | |
171dccd5 | 1189 | if (!same_suspect(e->suspect, origin)) |
c2e525d9 JH |
1190 | continue; |
1191 | origin_incref(porigin); | |
1192 | origin_decref(e->suspect); | |
1193 | e->suspect = porigin; | |
1194 | } | |
1195 | } | |
1196 | ||
cee7f245 JH |
1197 | #define MAXPARENT 16 |
1198 | ||
d24bba80 | 1199 | static void pass_blame(struct scoreboard *sb, struct origin *origin, int opt) |
cee7f245 | 1200 | { |
f69e743d | 1201 | int i, pass; |
cee7f245 JH |
1202 | struct commit *commit = origin->commit; |
1203 | struct commit_list *parent; | |
1204 | struct origin *parent_origin[MAXPARENT], *porigin; | |
1205 | ||
1206 | memset(parent_origin, 0, sizeof(parent_origin)); | |
cee7f245 | 1207 | |
f69e743d JH |
1208 | /* The first pass looks for unrenamed path to optimize for |
1209 | * common cases, then we look for renames in the second pass. | |
1210 | */ | |
1211 | for (pass = 0; pass < 2; pass++) { | |
1212 | struct origin *(*find)(struct scoreboard *, | |
1213 | struct commit *, struct origin *); | |
1214 | find = pass ? find_rename : find_origin; | |
1215 | ||
1216 | for (i = 0, parent = commit->parents; | |
1217 | i < MAXPARENT && parent; | |
1218 | parent = parent->next, i++) { | |
1219 | struct commit *p = parent->item; | |
0421d9f8 | 1220 | int j, same; |
f69e743d JH |
1221 | |
1222 | if (parent_origin[i]) | |
1223 | continue; | |
1224 | if (parse_commit(p)) | |
1225 | continue; | |
0d981c67 | 1226 | porigin = find(sb, p, origin); |
f69e743d JH |
1227 | if (!porigin) |
1228 | continue; | |
1229 | if (!hashcmp(porigin->blob_sha1, origin->blob_sha1)) { | |
c2e525d9 | 1230 | pass_whole_blame(sb, origin, porigin); |
f69e743d JH |
1231 | origin_decref(porigin); |
1232 | goto finish; | |
1233 | } | |
0421d9f8 | 1234 | for (j = same = 0; j < i; j++) |
33494784 JH |
1235 | if (parent_origin[j] && |
1236 | !hashcmp(parent_origin[j]->blob_sha1, | |
0421d9f8 JH |
1237 | porigin->blob_sha1)) { |
1238 | same = 1; | |
1239 | break; | |
1240 | } | |
1241 | if (!same) | |
1242 | parent_origin[i] = porigin; | |
1243 | else | |
1244 | origin_decref(porigin); | |
cee7f245 | 1245 | } |
cee7f245 JH |
1246 | } |
1247 | ||
c2e525d9 | 1248 | num_commits++; |
cee7f245 JH |
1249 | for (i = 0, parent = commit->parents; |
1250 | i < MAXPARENT && parent; | |
1251 | parent = parent->next, i++) { | |
1252 | struct origin *porigin = parent_origin[i]; | |
1253 | if (!porigin) | |
1254 | continue; | |
1255 | if (pass_blame_to_parent(sb, origin, porigin)) | |
54a4c617 | 1256 | goto finish; |
cee7f245 | 1257 | } |
d24bba80 JH |
1258 | |
1259 | /* | |
1732a1fd | 1260 | * Optionally find moves in parents' files. |
d24bba80 JH |
1261 | */ |
1262 | if (opt & PICKAXE_BLAME_MOVE) | |
1263 | for (i = 0, parent = commit->parents; | |
1264 | i < MAXPARENT && parent; | |
1265 | parent = parent->next, i++) { | |
1266 | struct origin *porigin = parent_origin[i]; | |
1267 | if (!porigin) | |
1268 | continue; | |
1269 | if (find_move_in_parent(sb, origin, porigin)) | |
54a4c617 | 1270 | goto finish; |
d24bba80 JH |
1271 | } |
1272 | ||
18abd745 | 1273 | /* |
1732a1fd | 1274 | * Optionally find copies from parents' files. |
18abd745 JH |
1275 | */ |
1276 | if (opt & PICKAXE_BLAME_COPY) | |
1277 | for (i = 0, parent = commit->parents; | |
1278 | i < MAXPARENT && parent; | |
1279 | parent = parent->next, i++) { | |
1280 | struct origin *porigin = parent_origin[i]; | |
1281 | if (find_copy_in_parent(sb, origin, parent->item, | |
1282 | porigin, opt)) | |
54a4c617 | 1283 | goto finish; |
18abd745 | 1284 | } |
54a4c617 JH |
1285 | |
1286 | finish: | |
7c3c7962 JH |
1287 | for (i = 0; i < MAXPARENT; i++) { |
1288 | if (parent_origin[i]) { | |
1289 | drop_origin_blob(parent_origin[i]); | |
1290 | origin_decref(parent_origin[i]); | |
1291 | } | |
1292 | } | |
1293 | drop_origin_blob(origin); | |
cee7f245 JH |
1294 | } |
1295 | ||
1732a1fd JH |
1296 | /* |
1297 | * Information on commits, used for output. | |
1298 | */ | |
cee7f245 JH |
1299 | struct commit_info |
1300 | { | |
3a55602e SP |
1301 | const char *author; |
1302 | const char *author_mail; | |
cee7f245 | 1303 | unsigned long author_time; |
3a55602e | 1304 | const char *author_tz; |
cee7f245 JH |
1305 | |
1306 | /* filled only when asked for details */ | |
3a55602e SP |
1307 | const char *committer; |
1308 | const char *committer_mail; | |
cee7f245 | 1309 | unsigned long committer_time; |
3a55602e | 1310 | const char *committer_tz; |
cee7f245 | 1311 | |
3a55602e | 1312 | const char *summary; |
cee7f245 JH |
1313 | }; |
1314 | ||
1732a1fd JH |
1315 | /* |
1316 | * Parse author/committer line in the commit object buffer | |
1317 | */ | |
cee7f245 | 1318 | static void get_ac_line(const char *inbuf, const char *what, |
3a55602e SP |
1319 | int bufsz, char *person, const char **mail, |
1320 | unsigned long *time, const char **tz) | |
cee7f245 | 1321 | { |
f9567384 JH |
1322 | int len, tzlen, maillen; |
1323 | char *tmp, *endp, *timepos; | |
cee7f245 JH |
1324 | |
1325 | tmp = strstr(inbuf, what); | |
1326 | if (!tmp) | |
1327 | goto error_out; | |
1328 | tmp += strlen(what); | |
1329 | endp = strchr(tmp, '\n'); | |
1330 | if (!endp) | |
1331 | len = strlen(tmp); | |
1332 | else | |
1333 | len = endp - tmp; | |
1334 | if (bufsz <= len) { | |
1335 | error_out: | |
1336 | /* Ugh */ | |
3a55602e | 1337 | *mail = *tz = "(unknown)"; |
cee7f245 JH |
1338 | *time = 0; |
1339 | return; | |
1340 | } | |
1341 | memcpy(person, tmp, len); | |
1342 | ||
1343 | tmp = person; | |
1344 | tmp += len; | |
1345 | *tmp = 0; | |
1346 | while (*tmp != ' ') | |
1347 | tmp--; | |
1348 | *tz = tmp+1; | |
f9567384 | 1349 | tzlen = (person+len)-(tmp+1); |
cee7f245 JH |
1350 | |
1351 | *tmp = 0; | |
1352 | while (*tmp != ' ') | |
1353 | tmp--; | |
1354 | *time = strtoul(tmp, NULL, 10); | |
f9567384 | 1355 | timepos = tmp; |
cee7f245 JH |
1356 | |
1357 | *tmp = 0; | |
1358 | while (*tmp != ' ') | |
1359 | tmp--; | |
1360 | *mail = tmp + 1; | |
1361 | *tmp = 0; | |
f9567384 JH |
1362 | maillen = timepos - tmp; |
1363 | ||
1364 | if (!mailmap.nr) | |
1365 | return; | |
1366 | ||
1367 | /* | |
1368 | * mailmap expansion may make the name longer. | |
1369 | * make room by pushing stuff down. | |
1370 | */ | |
1371 | tmp = person + bufsz - (tzlen + 1); | |
1372 | memmove(tmp, *tz, tzlen); | |
1373 | tmp[tzlen] = 0; | |
1374 | *tz = tmp; | |
1375 | ||
1376 | tmp = tmp - (maillen + 1); | |
1377 | memmove(tmp, *mail, maillen); | |
1378 | tmp[maillen] = 0; | |
1379 | *mail = tmp; | |
1380 | ||
1381 | /* | |
1382 | * Now, convert e-mail using mailmap | |
1383 | */ | |
1384 | map_email(&mailmap, tmp + 1, person, tmp-person-1); | |
cee7f245 JH |
1385 | } |
1386 | ||
1387 | static void get_commit_info(struct commit *commit, | |
1388 | struct commit_info *ret, | |
1389 | int detailed) | |
1390 | { | |
1391 | int len; | |
1392 | char *tmp, *endp; | |
1393 | static char author_buf[1024]; | |
1394 | static char committer_buf[1024]; | |
1395 | static char summary_buf[1024]; | |
1396 | ||
1732a1fd JH |
1397 | /* |
1398 | * We've operated without save_commit_buffer, so | |
612702e8 JH |
1399 | * we now need to populate them for output. |
1400 | */ | |
1401 | if (!commit->buffer) { | |
21666f1a | 1402 | enum object_type type; |
612702e8 JH |
1403 | unsigned long size; |
1404 | commit->buffer = | |
21666f1a | 1405 | read_sha1_file(commit->object.sha1, &type, &size); |
ab43e495 JH |
1406 | if (!commit->buffer) |
1407 | die("Cannot read commit %s", | |
1408 | sha1_to_hex(commit->object.sha1)); | |
612702e8 | 1409 | } |
cee7f245 JH |
1410 | ret->author = author_buf; |
1411 | get_ac_line(commit->buffer, "\nauthor ", | |
1412 | sizeof(author_buf), author_buf, &ret->author_mail, | |
1413 | &ret->author_time, &ret->author_tz); | |
1414 | ||
1415 | if (!detailed) | |
1416 | return; | |
1417 | ||
1418 | ret->committer = committer_buf; | |
1419 | get_ac_line(commit->buffer, "\ncommitter ", | |
1420 | sizeof(committer_buf), committer_buf, &ret->committer_mail, | |
1421 | &ret->committer_time, &ret->committer_tz); | |
1422 | ||
1423 | ret->summary = summary_buf; | |
1424 | tmp = strstr(commit->buffer, "\n\n"); | |
1425 | if (!tmp) { | |
1426 | error_out: | |
1427 | sprintf(summary_buf, "(%s)", sha1_to_hex(commit->object.sha1)); | |
1428 | return; | |
1429 | } | |
1430 | tmp += 2; | |
1431 | endp = strchr(tmp, '\n'); | |
1432 | if (!endp) | |
1cfe7733 | 1433 | endp = tmp + strlen(tmp); |
cee7f245 | 1434 | len = endp - tmp; |
1cfe7733 | 1435 | if (len >= sizeof(summary_buf) || len == 0) |
cee7f245 JH |
1436 | goto error_out; |
1437 | memcpy(summary_buf, tmp, len); | |
1438 | summary_buf[len] = 0; | |
1439 | } | |
1440 | ||
1732a1fd JH |
1441 | /* |
1442 | * To allow LF and other nonportable characters in pathnames, | |
1443 | * they are c-style quoted as needed. | |
1444 | */ | |
46e5e69d JH |
1445 | static void write_filename_info(const char *path) |
1446 | { | |
1447 | printf("filename "); | |
663af342 | 1448 | write_name_quoted(path, stdout, '\n'); |
46e5e69d JH |
1449 | } |
1450 | ||
1732a1fd JH |
1451 | /* |
1452 | * The blame_entry is found to be guilty for the range. Mark it | |
1453 | * as such, and show it in incremental output. | |
1454 | */ | |
717d1462 LT |
1455 | static void found_guilty_entry(struct blame_entry *ent) |
1456 | { | |
1457 | if (ent->guilty) | |
1458 | return; | |
1459 | ent->guilty = 1; | |
1460 | if (incremental) { | |
1461 | struct origin *suspect = ent->suspect; | |
1462 | ||
1463 | printf("%s %d %d %d\n", | |
1464 | sha1_to_hex(suspect->commit->object.sha1), | |
1465 | ent->s_lno + 1, ent->lno + 1, ent->num_lines); | |
1466 | if (!(suspect->commit->object.flags & METAINFO_SHOWN)) { | |
1467 | struct commit_info ci; | |
1468 | suspect->commit->object.flags |= METAINFO_SHOWN; | |
1469 | get_commit_info(suspect->commit, &ci, 1); | |
1470 | printf("author %s\n", ci.author); | |
1471 | printf("author-mail %s\n", ci.author_mail); | |
1472 | printf("author-time %lu\n", ci.author_time); | |
1473 | printf("author-tz %s\n", ci.author_tz); | |
1474 | printf("committer %s\n", ci.committer); | |
1475 | printf("committer-mail %s\n", ci.committer_mail); | |
1476 | printf("committer-time %lu\n", ci.committer_time); | |
1477 | printf("committer-tz %s\n", ci.committer_tz); | |
1478 | printf("summary %s\n", ci.summary); | |
1479 | if (suspect->commit->object.flags & UNINTERESTING) | |
1480 | printf("boundary\n"); | |
1481 | } | |
46e5e69d | 1482 | write_filename_info(suspect->path); |
06f59e9f | 1483 | maybe_flush_or_die(stdout, "stdout"); |
717d1462 LT |
1484 | } |
1485 | } | |
1486 | ||
1732a1fd JH |
1487 | /* |
1488 | * The main loop -- while the scoreboard has lines whose true origin | |
3dff5379 | 1489 | * is still unknown, pick one blame_entry, and allow its current |
1732a1fd JH |
1490 | * suspect to pass blames to its parents. |
1491 | */ | |
717d1462 LT |
1492 | static void assign_blame(struct scoreboard *sb, struct rev_info *revs, int opt) |
1493 | { | |
1494 | while (1) { | |
1495 | struct blame_entry *ent; | |
1496 | struct commit *commit; | |
1497 | struct origin *suspect = NULL; | |
1498 | ||
1499 | /* find one suspect to break down */ | |
1500 | for (ent = sb->ent; !suspect && ent; ent = ent->next) | |
1501 | if (!ent->guilty) | |
1502 | suspect = ent->suspect; | |
1503 | if (!suspect) | |
1504 | return; /* all done */ | |
1505 | ||
1732a1fd JH |
1506 | /* |
1507 | * We will use this suspect later in the loop, | |
1508 | * so hold onto it in the meantime. | |
1509 | */ | |
717d1462 LT |
1510 | origin_incref(suspect); |
1511 | commit = suspect->commit; | |
1512 | if (!commit->object.parsed) | |
1513 | parse_commit(commit); | |
1514 | if (!(commit->object.flags & UNINTERESTING) && | |
1732a1fd | 1515 | !(revs->max_age != -1 && commit->date < revs->max_age)) |
717d1462 LT |
1516 | pass_blame(sb, suspect, opt); |
1517 | else { | |
1518 | commit->object.flags |= UNINTERESTING; | |
1519 | if (commit->object.parsed) | |
1520 | mark_parents_uninteresting(commit); | |
1521 | } | |
1522 | /* treat root commit as boundary */ | |
1523 | if (!commit->parents && !show_root) | |
1524 | commit->object.flags |= UNINTERESTING; | |
1525 | ||
1526 | /* Take responsibility for the remaining entries */ | |
1527 | for (ent = sb->ent; ent; ent = ent->next) | |
171dccd5 | 1528 | if (same_suspect(ent->suspect, suspect)) |
717d1462 LT |
1529 | found_guilty_entry(ent); |
1530 | origin_decref(suspect); | |
1531 | ||
1532 | if (DEBUG) /* sanity */ | |
1533 | sanity_check_refcnt(sb); | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | static const char *format_time(unsigned long time, const char *tz_str, | |
1538 | int show_raw_time) | |
1539 | { | |
1540 | static char time_buf[128]; | |
1541 | time_t t = time; | |
1542 | int minutes, tz; | |
1543 | struct tm *tm; | |
1544 | ||
1545 | if (show_raw_time) { | |
1546 | sprintf(time_buf, "%lu %s", time, tz_str); | |
1547 | return time_buf; | |
1548 | } | |
1549 | ||
1550 | tz = atoi(tz_str); | |
1551 | minutes = tz < 0 ? -tz : tz; | |
1552 | minutes = (minutes / 100)*60 + (minutes % 100); | |
1553 | minutes = tz < 0 ? -minutes : minutes; | |
1554 | t = time + minutes * 60; | |
1555 | tm = gmtime(&t); | |
1556 | ||
1557 | strftime(time_buf, sizeof(time_buf), "%Y-%m-%d %H:%M:%S ", tm); | |
1558 | strcat(time_buf, tz_str); | |
1559 | return time_buf; | |
1560 | } | |
1561 | ||
cee7f245 JH |
1562 | #define OUTPUT_ANNOTATE_COMPAT 001 |
1563 | #define OUTPUT_LONG_OBJECT_NAME 002 | |
1564 | #define OUTPUT_RAW_TIMESTAMP 004 | |
1565 | #define OUTPUT_PORCELAIN 010 | |
1566 | #define OUTPUT_SHOW_NAME 020 | |
1567 | #define OUTPUT_SHOW_NUMBER 040 | |
5ff62c30 | 1568 | #define OUTPUT_SHOW_SCORE 0100 |
093dc5be | 1569 | #define OUTPUT_NO_AUTHOR 0200 |
cee7f245 JH |
1570 | |
1571 | static void emit_porcelain(struct scoreboard *sb, struct blame_entry *ent) | |
1572 | { | |
1573 | int cnt; | |
1574 | const char *cp; | |
1575 | struct origin *suspect = ent->suspect; | |
1576 | char hex[41]; | |
1577 | ||
1578 | strcpy(hex, sha1_to_hex(suspect->commit->object.sha1)); | |
1579 | printf("%s%c%d %d %d\n", | |
1580 | hex, | |
1581 | ent->guilty ? ' ' : '*', // purely for debugging | |
1582 | ent->s_lno + 1, | |
1583 | ent->lno + 1, | |
1584 | ent->num_lines); | |
1585 | if (!(suspect->commit->object.flags & METAINFO_SHOWN)) { | |
1586 | struct commit_info ci; | |
1587 | suspect->commit->object.flags |= METAINFO_SHOWN; | |
1588 | get_commit_info(suspect->commit, &ci, 1); | |
1589 | printf("author %s\n", ci.author); | |
1590 | printf("author-mail %s\n", ci.author_mail); | |
1591 | printf("author-time %lu\n", ci.author_time); | |
1592 | printf("author-tz %s\n", ci.author_tz); | |
1593 | printf("committer %s\n", ci.committer); | |
1594 | printf("committer-mail %s\n", ci.committer_mail); | |
1595 | printf("committer-time %lu\n", ci.committer_time); | |
1596 | printf("committer-tz %s\n", ci.committer_tz); | |
46e5e69d | 1597 | write_filename_info(suspect->path); |
cee7f245 | 1598 | printf("summary %s\n", ci.summary); |
b11121d9 JH |
1599 | if (suspect->commit->object.flags & UNINTERESTING) |
1600 | printf("boundary\n"); | |
cee7f245 JH |
1601 | } |
1602 | else if (suspect->commit->object.flags & MORE_THAN_ONE_PATH) | |
46e5e69d | 1603 | write_filename_info(suspect->path); |
cee7f245 JH |
1604 | |
1605 | cp = nth_line(sb, ent->lno); | |
1606 | for (cnt = 0; cnt < ent->num_lines; cnt++) { | |
1607 | char ch; | |
1608 | if (cnt) | |
1609 | printf("%s %d %d\n", hex, | |
1610 | ent->s_lno + 1 + cnt, | |
1611 | ent->lno + 1 + cnt); | |
1612 | putchar('\t'); | |
1613 | do { | |
1614 | ch = *cp++; | |
1615 | putchar(ch); | |
1616 | } while (ch != '\n' && | |
1617 | cp < sb->final_buf + sb->final_buf_size); | |
1618 | } | |
1619 | } | |
1620 | ||
1621 | static void emit_other(struct scoreboard *sb, struct blame_entry *ent, int opt) | |
1622 | { | |
1623 | int cnt; | |
1624 | const char *cp; | |
1625 | struct origin *suspect = ent->suspect; | |
1626 | struct commit_info ci; | |
1627 | char hex[41]; | |
1628 | int show_raw_time = !!(opt & OUTPUT_RAW_TIMESTAMP); | |
1629 | ||
1630 | get_commit_info(suspect->commit, &ci, 1); | |
1631 | strcpy(hex, sha1_to_hex(suspect->commit->object.sha1)); | |
1632 | ||
1633 | cp = nth_line(sb, ent->lno); | |
1634 | for (cnt = 0; cnt < ent->num_lines; cnt++) { | |
1635 | char ch; | |
b11121d9 JH |
1636 | int length = (opt & OUTPUT_LONG_OBJECT_NAME) ? 40 : 8; |
1637 | ||
1638 | if (suspect->commit->object.flags & UNINTERESTING) { | |
e68989a7 JH |
1639 | if (blank_boundary) |
1640 | memset(hex, ' ', length); | |
1641 | else if (!cmd_is_annotate) { | |
4c10a5ca JH |
1642 | length--; |
1643 | putchar('^'); | |
1644 | } | |
b11121d9 | 1645 | } |
cee7f245 | 1646 | |
b11121d9 | 1647 | printf("%.*s", length, hex); |
cee7f245 JH |
1648 | if (opt & OUTPUT_ANNOTATE_COMPAT) |
1649 | printf("\t(%10s\t%10s\t%d)", ci.author, | |
1650 | format_time(ci.author_time, ci.author_tz, | |
1651 | show_raw_time), | |
1652 | ent->lno + 1 + cnt); | |
1653 | else { | |
5ff62c30 | 1654 | if (opt & OUTPUT_SHOW_SCORE) |
54a4c617 JH |
1655 | printf(" %*d %02d", |
1656 | max_score_digits, ent->score, | |
1657 | ent->suspect->refcnt); | |
cee7f245 JH |
1658 | if (opt & OUTPUT_SHOW_NAME) |
1659 | printf(" %-*.*s", longest_file, longest_file, | |
1660 | suspect->path); | |
1661 | if (opt & OUTPUT_SHOW_NUMBER) | |
1662 | printf(" %*d", max_orig_digits, | |
1663 | ent->s_lno + 1 + cnt); | |
093dc5be JH |
1664 | |
1665 | if (!(opt & OUTPUT_NO_AUTHOR)) | |
1666 | printf(" (%-*.*s %10s", | |
1667 | longest_author, longest_author, | |
1668 | ci.author, | |
1669 | format_time(ci.author_time, | |
1670 | ci.author_tz, | |
1671 | show_raw_time)); | |
1672 | printf(" %*d) ", | |
cee7f245 JH |
1673 | max_digits, ent->lno + 1 + cnt); |
1674 | } | |
1675 | do { | |
1676 | ch = *cp++; | |
1677 | putchar(ch); | |
1678 | } while (ch != '\n' && | |
1679 | cp < sb->final_buf + sb->final_buf_size); | |
1680 | } | |
1681 | } | |
1682 | ||
1683 | static void output(struct scoreboard *sb, int option) | |
1684 | { | |
1685 | struct blame_entry *ent; | |
1686 | ||
1687 | if (option & OUTPUT_PORCELAIN) { | |
1688 | for (ent = sb->ent; ent; ent = ent->next) { | |
1689 | struct blame_entry *oth; | |
1690 | struct origin *suspect = ent->suspect; | |
1691 | struct commit *commit = suspect->commit; | |
1692 | if (commit->object.flags & MORE_THAN_ONE_PATH) | |
1693 | continue; | |
1694 | for (oth = ent->next; oth; oth = oth->next) { | |
1695 | if ((oth->suspect->commit != commit) || | |
1696 | !strcmp(oth->suspect->path, suspect->path)) | |
1697 | continue; | |
1698 | commit->object.flags |= MORE_THAN_ONE_PATH; | |
1699 | break; | |
1700 | } | |
1701 | } | |
1702 | } | |
1703 | ||
1704 | for (ent = sb->ent; ent; ent = ent->next) { | |
1705 | if (option & OUTPUT_PORCELAIN) | |
1706 | emit_porcelain(sb, ent); | |
5ff62c30 | 1707 | else { |
cee7f245 | 1708 | emit_other(sb, ent, option); |
5ff62c30 | 1709 | } |
cee7f245 JH |
1710 | } |
1711 | } | |
1712 | ||
1732a1fd JH |
1713 | /* |
1714 | * To allow quick access to the contents of nth line in the | |
1715 | * final image, prepare an index in the scoreboard. | |
1716 | */ | |
cee7f245 JH |
1717 | static int prepare_lines(struct scoreboard *sb) |
1718 | { | |
1719 | const char *buf = sb->final_buf; | |
1720 | unsigned long len = sb->final_buf_size; | |
1721 | int num = 0, incomplete = 0, bol = 1; | |
1722 | ||
1723 | if (len && buf[len-1] != '\n') | |
1724 | incomplete++; /* incomplete line at the end */ | |
1725 | while (len--) { | |
1726 | if (bol) { | |
1727 | sb->lineno = xrealloc(sb->lineno, | |
1728 | sizeof(int* ) * (num + 1)); | |
1729 | sb->lineno[num] = buf - sb->final_buf; | |
1730 | bol = 0; | |
1731 | } | |
1732 | if (*buf++ == '\n') { | |
1733 | num++; | |
1734 | bol = 1; | |
1735 | } | |
1736 | } | |
1ca6ca87 JH |
1737 | sb->lineno = xrealloc(sb->lineno, |
1738 | sizeof(int* ) * (num + incomplete + 1)); | |
1739 | sb->lineno[num + incomplete] = buf - sb->final_buf; | |
cee7f245 JH |
1740 | sb->num_lines = num + incomplete; |
1741 | return sb->num_lines; | |
1742 | } | |
1743 | ||
1732a1fd JH |
1744 | /* |
1745 | * Add phony grafts for use with -S; this is primarily to | |
1746 | * support git-cvsserver that wants to give a linear history | |
1747 | * to its clients. | |
1748 | */ | |
cee7f245 JH |
1749 | static int read_ancestry(const char *graft_file) |
1750 | { | |
1751 | FILE *fp = fopen(graft_file, "r"); | |
1752 | char buf[1024]; | |
1753 | if (!fp) | |
1754 | return -1; | |
1755 | while (fgets(buf, sizeof(buf), fp)) { | |
1756 | /* The format is just "Commit Parent1 Parent2 ...\n" */ | |
1757 | int len = strlen(buf); | |
1758 | struct commit_graft *graft = read_graft_line(buf, len); | |
8eaf7986 JH |
1759 | if (graft) |
1760 | register_commit_graft(graft, 0); | |
cee7f245 JH |
1761 | } |
1762 | fclose(fp); | |
1763 | return 0; | |
1764 | } | |
1765 | ||
1732a1fd JH |
1766 | /* |
1767 | * How many columns do we need to show line numbers in decimal? | |
1768 | */ | |
cee7f245 JH |
1769 | static int lineno_width(int lines) |
1770 | { | |
f2915045 | 1771 | int i, width; |
cee7f245 | 1772 | |
f2915045 JH |
1773 | for (width = 1, i = 10; i <= lines + 1; width++) |
1774 | i *= 10; | |
1775 | return width; | |
cee7f245 JH |
1776 | } |
1777 | ||
1732a1fd JH |
1778 | /* |
1779 | * How many columns do we need to show line numbers, authors, | |
1780 | * and filenames? | |
1781 | */ | |
cee7f245 JH |
1782 | static void find_alignment(struct scoreboard *sb, int *option) |
1783 | { | |
1784 | int longest_src_lines = 0; | |
1785 | int longest_dst_lines = 0; | |
5ff62c30 | 1786 | unsigned largest_score = 0; |
cee7f245 JH |
1787 | struct blame_entry *e; |
1788 | ||
1789 | for (e = sb->ent; e; e = e->next) { | |
1790 | struct origin *suspect = e->suspect; | |
1791 | struct commit_info ci; | |
1792 | int num; | |
1793 | ||
ab3bb800 JH |
1794 | if (strcmp(suspect->path, sb->path)) |
1795 | *option |= OUTPUT_SHOW_NAME; | |
1796 | num = strlen(suspect->path); | |
1797 | if (longest_file < num) | |
1798 | longest_file = num; | |
cee7f245 JH |
1799 | if (!(suspect->commit->object.flags & METAINFO_SHOWN)) { |
1800 | suspect->commit->object.flags |= METAINFO_SHOWN; | |
1801 | get_commit_info(suspect->commit, &ci, 1); | |
cee7f245 JH |
1802 | num = strlen(ci.author); |
1803 | if (longest_author < num) | |
1804 | longest_author = num; | |
1805 | } | |
1806 | num = e->s_lno + e->num_lines; | |
1807 | if (longest_src_lines < num) | |
1808 | longest_src_lines = num; | |
1809 | num = e->lno + e->num_lines; | |
1810 | if (longest_dst_lines < num) | |
1811 | longest_dst_lines = num; | |
5ff62c30 JH |
1812 | if (largest_score < ent_score(sb, e)) |
1813 | largest_score = ent_score(sb, e); | |
cee7f245 JH |
1814 | } |
1815 | max_orig_digits = lineno_width(longest_src_lines); | |
1816 | max_digits = lineno_width(longest_dst_lines); | |
5ff62c30 | 1817 | max_score_digits = lineno_width(largest_score); |
cee7f245 JH |
1818 | } |
1819 | ||
1732a1fd JH |
1820 | /* |
1821 | * For debugging -- origin is refcounted, and this asserts that | |
1822 | * we do not underflow. | |
1823 | */ | |
54a4c617 JH |
1824 | static void sanity_check_refcnt(struct scoreboard *sb) |
1825 | { | |
1826 | int baa = 0; | |
1827 | struct blame_entry *ent; | |
1828 | ||
1829 | for (ent = sb->ent; ent; ent = ent->next) { | |
ae86ad65 | 1830 | /* Nobody should have zero or negative refcnt */ |
854b97f6 JH |
1831 | if (ent->suspect->refcnt <= 0) { |
1832 | fprintf(stderr, "%s in %s has negative refcnt %d\n", | |
1833 | ent->suspect->path, | |
1834 | sha1_to_hex(ent->suspect->commit->object.sha1), | |
1835 | ent->suspect->refcnt); | |
ae86ad65 | 1836 | baa = 1; |
854b97f6 | 1837 | } |
ae86ad65 JH |
1838 | } |
1839 | for (ent = sb->ent; ent; ent = ent->next) { | |
1840 | /* Mark the ones that haven't been checked */ | |
54a4c617 JH |
1841 | if (0 < ent->suspect->refcnt) |
1842 | ent->suspect->refcnt = -ent->suspect->refcnt; | |
54a4c617 JH |
1843 | } |
1844 | for (ent = sb->ent; ent; ent = ent->next) { | |
1732a1fd JH |
1845 | /* |
1846 | * ... then pick each and see if they have the the | |
1847 | * correct refcnt. | |
54a4c617 JH |
1848 | */ |
1849 | int found; | |
1850 | struct blame_entry *e; | |
1851 | struct origin *suspect = ent->suspect; | |
1852 | ||
1853 | if (0 < suspect->refcnt) | |
1854 | continue; | |
ae86ad65 | 1855 | suspect->refcnt = -suspect->refcnt; /* Unmark */ |
54a4c617 JH |
1856 | for (found = 0, e = sb->ent; e; e = e->next) { |
1857 | if (e->suspect != suspect) | |
1858 | continue; | |
1859 | found++; | |
1860 | } | |
854b97f6 JH |
1861 | if (suspect->refcnt != found) { |
1862 | fprintf(stderr, "%s in %s has refcnt %d, not %d\n", | |
1863 | ent->suspect->path, | |
1864 | sha1_to_hex(ent->suspect->commit->object.sha1), | |
1865 | ent->suspect->refcnt, found); | |
1866 | baa = 2; | |
1867 | } | |
54a4c617 JH |
1868 | } |
1869 | if (baa) { | |
1870 | int opt = 0160; | |
1871 | find_alignment(sb, &opt); | |
1872 | output(sb, opt); | |
854b97f6 | 1873 | die("Baa %d!", baa); |
54a4c617 JH |
1874 | } |
1875 | } | |
1876 | ||
1732a1fd JH |
1877 | /* |
1878 | * Used for the command line parsing; check if the path exists | |
1879 | * in the working tree. | |
1880 | */ | |
cee7f245 JH |
1881 | static int has_path_in_work_tree(const char *path) |
1882 | { | |
1883 | struct stat st; | |
1884 | return !lstat(path, &st); | |
1885 | } | |
1886 | ||
4a0fc95f JH |
1887 | static unsigned parse_score(const char *arg) |
1888 | { | |
1889 | char *end; | |
1890 | unsigned long score = strtoul(arg, &end, 10); | |
1891 | if (*end) | |
1892 | return 0; | |
1893 | return score; | |
1894 | } | |
1895 | ||
20239bae JK |
1896 | static const char *add_prefix(const char *prefix, const char *path) |
1897 | { | |
1898 | if (!prefix || !prefix[0]) | |
1899 | return path; | |
1900 | return prefix_path(prefix, strlen(prefix), path); | |
1901 | } | |
1902 | ||
1732a1fd JH |
1903 | /* |
1904 | * Parsing of (comma separated) one item in the -L option | |
1905 | */ | |
931233bc JH |
1906 | static const char *parse_loc(const char *spec, |
1907 | struct scoreboard *sb, long lno, | |
1908 | long begin, long *ret) | |
1909 | { | |
1910 | char *term; | |
1911 | const char *line; | |
1912 | long num; | |
1913 | int reg_error; | |
1914 | regex_t regexp; | |
1915 | regmatch_t match[1]; | |
1916 | ||
7bd9641d JH |
1917 | /* Allow "-L <something>,+20" to mean starting at <something> |
1918 | * for 20 lines, or "-L <something>,-5" for 5 lines ending at | |
1919 | * <something>. | |
1920 | */ | |
1921 | if (1 < begin && (spec[0] == '+' || spec[0] == '-')) { | |
1922 | num = strtol(spec + 1, &term, 10); | |
1923 | if (term != spec + 1) { | |
1924 | if (spec[0] == '-') | |
1925 | num = 0 - num; | |
1926 | if (0 < num) | |
1927 | *ret = begin + num - 2; | |
1928 | else if (!num) | |
1929 | *ret = begin; | |
1930 | else | |
1931 | *ret = begin + num; | |
1932 | return term; | |
1933 | } | |
1934 | return spec; | |
1935 | } | |
931233bc JH |
1936 | num = strtol(spec, &term, 10); |
1937 | if (term != spec) { | |
1938 | *ret = num; | |
1939 | return term; | |
1940 | } | |
1941 | if (spec[0] != '/') | |
1942 | return spec; | |
1943 | ||
1944 | /* it could be a regexp of form /.../ */ | |
1945 | for (term = (char*) spec + 1; *term && *term != '/'; term++) { | |
1946 | if (*term == '\\') | |
1947 | term++; | |
1948 | } | |
1949 | if (*term != '/') | |
1950 | return spec; | |
1951 | ||
1952 | /* try [spec+1 .. term-1] as regexp */ | |
1953 | *term = 0; | |
1954 | begin--; /* input is in human terms */ | |
1955 | line = nth_line(sb, begin); | |
1956 | ||
1957 | if (!(reg_error = regcomp(®exp, spec + 1, REG_NEWLINE)) && | |
1958 | !(reg_error = regexec(®exp, line, 1, match, 0))) { | |
1959 | const char *cp = line + match[0].rm_so; | |
1960 | const char *nline; | |
1961 | ||
1962 | while (begin++ < lno) { | |
1963 | nline = nth_line(sb, begin); | |
1964 | if (line <= cp && cp < nline) | |
1965 | break; | |
1966 | line = nline; | |
1967 | } | |
1968 | *ret = begin; | |
1969 | regfree(®exp); | |
1970 | *term++ = '/'; | |
1971 | return term; | |
1972 | } | |
1973 | else { | |
1974 | char errbuf[1024]; | |
1975 | regerror(reg_error, ®exp, errbuf, 1024); | |
1976 | die("-L parameter '%s': %s", spec + 1, errbuf); | |
1977 | } | |
1978 | } | |
1979 | ||
1732a1fd JH |
1980 | /* |
1981 | * Parsing of -L option | |
1982 | */ | |
931233bc JH |
1983 | static void prepare_blame_range(struct scoreboard *sb, |
1984 | const char *bottomtop, | |
1985 | long lno, | |
1986 | long *bottom, long *top) | |
1987 | { | |
1988 | const char *term; | |
1989 | ||
1990 | term = parse_loc(bottomtop, sb, lno, 1, bottom); | |
1991 | if (*term == ',') { | |
1992 | term = parse_loc(term + 1, sb, lno, *bottom + 1, top); | |
1993 | if (*term) | |
acca687f | 1994 | usage(blame_usage); |
931233bc JH |
1995 | } |
1996 | if (*term) | |
acca687f | 1997 | usage(blame_usage); |
931233bc JH |
1998 | } |
1999 | ||
4c10a5ca JH |
2000 | static int git_blame_config(const char *var, const char *value) |
2001 | { | |
2002 | if (!strcmp(var, "blame.showroot")) { | |
2003 | show_root = git_config_bool(var, value); | |
2004 | return 0; | |
2005 | } | |
2006 | if (!strcmp(var, "blame.blankboundary")) { | |
2007 | blank_boundary = git_config_bool(var, value); | |
2008 | return 0; | |
2009 | } | |
2010 | return git_default_config(var, value); | |
2011 | } | |
2012 | ||
1cfe7733 JH |
2013 | static struct commit *fake_working_tree_commit(const char *path, const char *contents_from) |
2014 | { | |
2015 | struct commit *commit; | |
2016 | struct origin *origin; | |
2017 | unsigned char head_sha1[20]; | |
af6eb822 | 2018 | struct strbuf buf; |
1cfe7733 | 2019 | const char *ident; |
1cfe7733 | 2020 | time_t now; |
1cfe7733 JH |
2021 | int size, len; |
2022 | struct cache_entry *ce; | |
2023 | unsigned mode; | |
2024 | ||
2025 | if (get_sha1("HEAD", head_sha1)) | |
2026 | die("No such ref: HEAD"); | |
2027 | ||
2028 | time(&now); | |
2029 | commit = xcalloc(1, sizeof(*commit)); | |
2030 | commit->parents = xcalloc(1, sizeof(*commit->parents)); | |
2031 | commit->parents->item = lookup_commit_reference(head_sha1); | |
2032 | commit->object.parsed = 1; | |
2033 | commit->date = now; | |
2034 | commit->object.type = OBJ_COMMIT; | |
2035 | ||
2036 | origin = make_origin(commit, path); | |
2037 | ||
f1696ee3 | 2038 | strbuf_init(&buf, 0); |
1cfe7733 JH |
2039 | if (!contents_from || strcmp("-", contents_from)) { |
2040 | struct stat st; | |
2041 | const char *read_from; | |
af6eb822 | 2042 | unsigned long fin_size; |
1cfe7733 JH |
2043 | |
2044 | if (contents_from) { | |
2045 | if (stat(contents_from, &st) < 0) | |
2046 | die("Cannot stat %s", contents_from); | |
2047 | read_from = contents_from; | |
2048 | } | |
2049 | else { | |
2050 | if (lstat(path, &st) < 0) | |
2051 | die("Cannot lstat %s", path); | |
2052 | read_from = path; | |
2053 | } | |
dc49cd76 | 2054 | fin_size = xsize_t(st.st_size); |
1cfe7733 JH |
2055 | mode = canon_mode(st.st_mode); |
2056 | switch (st.st_mode & S_IFMT) { | |
2057 | case S_IFREG: | |
387e7e19 PH |
2058 | if (strbuf_read_file(&buf, read_from, st.st_size) != st.st_size) |
2059 | die("cannot open or read %s", read_from); | |
1cfe7733 JH |
2060 | break; |
2061 | case S_IFLNK: | |
af6eb822 | 2062 | if (readlink(read_from, buf.buf, buf.alloc) != fin_size) |
1cfe7733 | 2063 | die("cannot readlink %s", read_from); |
af6eb822 | 2064 | buf.len = fin_size; |
1cfe7733 JH |
2065 | break; |
2066 | default: | |
2067 | die("unsupported file type %s", read_from); | |
2068 | } | |
2069 | } | |
2070 | else { | |
2071 | /* Reading from stdin */ | |
2072 | contents_from = "standard input"; | |
1cfe7733 | 2073 | mode = 0; |
f1696ee3 | 2074 | if (strbuf_read(&buf, 0, 0) < 0) |
af6eb822 | 2075 | die("read error %s from stdin", strerror(errno)); |
1cfe7733 | 2076 | } |
8f353ee5 | 2077 | convert_to_git(path, buf.buf, buf.len, &buf); |
af6eb822 PH |
2078 | origin->file.ptr = buf.buf; |
2079 | origin->file.size = buf.len; | |
2080 | pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, origin->blob_sha1); | |
1cfe7733 JH |
2081 | commit->util = origin; |
2082 | ||
2083 | /* | |
2084 | * Read the current index, replace the path entry with | |
2085 | * origin->blob_sha1 without mucking with its mode or type | |
2086 | * bits; we are not going to write this index out -- we just | |
2087 | * want to run "diff-index --cached". | |
2088 | */ | |
2089 | discard_cache(); | |
2090 | read_cache(); | |
2091 | ||
2092 | len = strlen(path); | |
2093 | if (!mode) { | |
2094 | int pos = cache_name_pos(path, len); | |
2095 | if (0 <= pos) | |
2096 | mode = ntohl(active_cache[pos]->ce_mode); | |
2097 | else | |
2098 | /* Let's not bother reading from HEAD tree */ | |
2099 | mode = S_IFREG | 0644; | |
2100 | } | |
2101 | size = cache_entry_size(len); | |
2102 | ce = xcalloc(1, size); | |
2103 | hashcpy(ce->sha1, origin->blob_sha1); | |
2104 | memcpy(ce->name, path, len); | |
2105 | ce->ce_flags = create_ce_flags(len, 0); | |
2106 | ce->ce_mode = create_ce_mode(mode); | |
2107 | add_cache_entry(ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE); | |
2108 | ||
2109 | /* | |
2110 | * We are not going to write this out, so this does not matter | |
2111 | * right now, but someday we might optimize diff-index --cached | |
2112 | * with cache-tree information. | |
2113 | */ | |
2114 | cache_tree_invalidate_path(active_cache_tree, path); | |
2115 | ||
2116 | commit->buffer = xmalloc(400); | |
2117 | ident = fmt_ident("Not Committed Yet", "not.committed.yet", NULL, 0); | |
1bb88be9 | 2118 | snprintf(commit->buffer, 400, |
1cfe7733 JH |
2119 | "tree 0000000000000000000000000000000000000000\n" |
2120 | "parent %s\n" | |
2121 | "author %s\n" | |
2122 | "committer %s\n\n" | |
2123 | "Version of %s from %s\n", | |
2124 | sha1_to_hex(head_sha1), | |
2125 | ident, ident, path, contents_from ? contents_from : path); | |
2126 | return commit; | |
2127 | } | |
2128 | ||
acca687f | 2129 | int cmd_blame(int argc, const char **argv, const char *prefix) |
cee7f245 JH |
2130 | { |
2131 | struct rev_info revs; | |
2132 | const char *path; | |
2133 | struct scoreboard sb; | |
2134 | struct origin *o; | |
2135 | struct blame_entry *ent; | |
d24bba80 | 2136 | int i, seen_dashdash, unk, opt; |
cee7f245 JH |
2137 | long bottom, top, lno; |
2138 | int output_option = 0; | |
870b39c1 | 2139 | int show_stats = 0; |
cee7f245 JH |
2140 | const char *revs_file = NULL; |
2141 | const char *final_commit_name = NULL; | |
21666f1a | 2142 | enum object_type type; |
931233bc | 2143 | const char *bottomtop = NULL; |
1cfe7733 | 2144 | const char *contents_from = NULL; |
cee7f245 | 2145 | |
e68989a7 JH |
2146 | cmd_is_annotate = !strcmp(argv[0], "annotate"); |
2147 | ||
4c10a5ca | 2148 | git_config(git_blame_config); |
612702e8 JH |
2149 | save_commit_buffer = 0; |
2150 | ||
d24bba80 | 2151 | opt = 0; |
cee7f245 JH |
2152 | seen_dashdash = 0; |
2153 | for (unk = i = 1; i < argc; i++) { | |
2154 | const char *arg = argv[i]; | |
2155 | if (*arg != '-') | |
2156 | break; | |
4c10a5ca JH |
2157 | else if (!strcmp("-b", arg)) |
2158 | blank_boundary = 1; | |
2159 | else if (!strcmp("--root", arg)) | |
2160 | show_root = 1; | |
870b39c1 JH |
2161 | else if (!strcmp(arg, "--show-stats")) |
2162 | show_stats = 1; | |
cee7f245 JH |
2163 | else if (!strcmp("-c", arg)) |
2164 | output_option |= OUTPUT_ANNOTATE_COMPAT; | |
2165 | else if (!strcmp("-t", arg)) | |
2166 | output_option |= OUTPUT_RAW_TIMESTAMP; | |
2167 | else if (!strcmp("-l", arg)) | |
2168 | output_option |= OUTPUT_LONG_OBJECT_NAME; | |
093dc5be JH |
2169 | else if (!strcmp("-s", arg)) |
2170 | output_option |= OUTPUT_NO_AUTHOR; | |
b82871b3 JH |
2171 | else if (!strcmp("-w", arg)) |
2172 | xdl_opts |= XDF_IGNORE_WHITESPACE; | |
cee7f245 JH |
2173 | else if (!strcmp("-S", arg) && ++i < argc) |
2174 | revs_file = argv[i]; | |
599065a3 | 2175 | else if (!prefixcmp(arg, "-M")) { |
d24bba80 | 2176 | opt |= PICKAXE_BLAME_MOVE; |
4a0fc95f JH |
2177 | blame_move_score = parse_score(arg+2); |
2178 | } | |
599065a3 | 2179 | else if (!prefixcmp(arg, "-C")) { |
c63777c0 JH |
2180 | /* |
2181 | * -C enables copy from removed files; | |
2182 | * -C -C enables copy from existing files, but only | |
2183 | * when blaming a new file; | |
2184 | * -C -C -C enables copy from existing files for | |
2185 | * everybody | |
2186 | */ | |
2187 | if (opt & PICKAXE_BLAME_COPY_HARDER) | |
2188 | opt |= PICKAXE_BLAME_COPY_HARDEST; | |
18abd745 JH |
2189 | if (opt & PICKAXE_BLAME_COPY) |
2190 | opt |= PICKAXE_BLAME_COPY_HARDER; | |
2191 | opt |= PICKAXE_BLAME_COPY | PICKAXE_BLAME_MOVE; | |
4a0fc95f | 2192 | blame_copy_score = parse_score(arg+2); |
18abd745 | 2193 | } |
599065a3 | 2194 | else if (!prefixcmp(arg, "-L")) { |
2c40f984 JH |
2195 | if (!arg[2]) { |
2196 | if (++i >= argc) | |
acca687f | 2197 | usage(blame_usage); |
2c40f984 JH |
2198 | arg = argv[i]; |
2199 | } | |
2200 | else | |
2201 | arg += 2; | |
931233bc | 2202 | if (bottomtop) |
cee7f245 | 2203 | die("More than one '-L n,m' option given"); |
931233bc | 2204 | bottomtop = arg; |
cee7f245 | 2205 | } |
1cfe7733 JH |
2206 | else if (!strcmp("--contents", arg)) { |
2207 | if (++i >= argc) | |
2208 | usage(blame_usage); | |
2209 | contents_from = argv[i]; | |
2210 | } | |
717d1462 LT |
2211 | else if (!strcmp("--incremental", arg)) |
2212 | incremental = 1; | |
5ff62c30 JH |
2213 | else if (!strcmp("--score-debug", arg)) |
2214 | output_option |= OUTPUT_SHOW_SCORE; | |
cee7f245 JH |
2215 | else if (!strcmp("-f", arg) || |
2216 | !strcmp("--show-name", arg)) | |
2217 | output_option |= OUTPUT_SHOW_NAME; | |
2218 | else if (!strcmp("-n", arg) || | |
2219 | !strcmp("--show-number", arg)) | |
2220 | output_option |= OUTPUT_SHOW_NUMBER; | |
2221 | else if (!strcmp("-p", arg) || | |
2222 | !strcmp("--porcelain", arg)) | |
2223 | output_option |= OUTPUT_PORCELAIN; | |
2224 | else if (!strcmp("--", arg)) { | |
2225 | seen_dashdash = 1; | |
2226 | i++; | |
2227 | break; | |
2228 | } | |
2229 | else | |
2230 | argv[unk++] = arg; | |
2231 | } | |
2232 | ||
4a0fc95f JH |
2233 | if (!blame_move_score) |
2234 | blame_move_score = BLAME_DEFAULT_MOVE_SCORE; | |
2235 | if (!blame_copy_score) | |
2236 | blame_copy_score = BLAME_DEFAULT_COPY_SCORE; | |
2237 | ||
1732a1fd JH |
2238 | /* |
2239 | * We have collected options unknown to us in argv[1..unk] | |
cee7f245 | 2240 | * which are to be passed to revision machinery if we are |
3dff5379 | 2241 | * going to do the "bottom" processing. |
cee7f245 JH |
2242 | * |
2243 | * The remaining are: | |
2244 | * | |
2245 | * (1) if seen_dashdash, its either | |
2246 | * "-options -- <path>" or | |
2247 | * "-options -- <path> <rev>". | |
2248 | * but the latter is allowed only if there is no | |
2249 | * options that we passed to revision machinery. | |
2250 | * | |
2251 | * (2) otherwise, we may have "--" somewhere later and | |
2252 | * might be looking at the first one of multiple 'rev' | |
2253 | * parameters (e.g. " master ^next ^maint -- path"). | |
2254 | * See if there is a dashdash first, and give the | |
2255 | * arguments before that to revision machinery. | |
2256 | * After that there must be one 'path'. | |
2257 | * | |
2258 | * (3) otherwise, its one of the three: | |
2259 | * "-options <path> <rev>" | |
2260 | * "-options <rev> <path>" | |
2261 | * "-options <path>" | |
2262 | * but again the first one is allowed only if | |
2263 | * there is no options that we passed to revision | |
2264 | * machinery. | |
2265 | */ | |
2266 | ||
2267 | if (seen_dashdash) { | |
2268 | /* (1) */ | |
2269 | if (argc <= i) | |
acca687f | 2270 | usage(blame_usage); |
20239bae | 2271 | path = add_prefix(prefix, argv[i]); |
cee7f245 JH |
2272 | if (i + 1 == argc - 1) { |
2273 | if (unk != 1) | |
acca687f | 2274 | usage(blame_usage); |
cee7f245 JH |
2275 | argv[unk++] = argv[i + 1]; |
2276 | } | |
2277 | else if (i + 1 != argc) | |
2278 | /* garbage at end */ | |
acca687f | 2279 | usage(blame_usage); |
cee7f245 JH |
2280 | } |
2281 | else { | |
2282 | int j; | |
2283 | for (j = i; !seen_dashdash && j < argc; j++) | |
2284 | if (!strcmp(argv[j], "--")) | |
2285 | seen_dashdash = j; | |
2286 | if (seen_dashdash) { | |
f4421325 | 2287 | /* (2) */ |
cee7f245 | 2288 | if (seen_dashdash + 1 != argc - 1) |
acca687f | 2289 | usage(blame_usage); |
20239bae | 2290 | path = add_prefix(prefix, argv[seen_dashdash + 1]); |
cee7f245 JH |
2291 | for (j = i; j < seen_dashdash; j++) |
2292 | argv[unk++] = argv[j]; | |
2293 | } | |
2294 | else { | |
2295 | /* (3) */ | |
f4421325 TK |
2296 | if (argc <= i) |
2297 | usage(blame_usage); | |
20239bae | 2298 | path = add_prefix(prefix, argv[i]); |
cee7f245 JH |
2299 | if (i + 1 == argc - 1) { |
2300 | final_commit_name = argv[i + 1]; | |
2301 | ||
2302 | /* if (unk == 1) we could be getting | |
2303 | * old-style | |
2304 | */ | |
2305 | if (unk == 1 && !has_path_in_work_tree(path)) { | |
20239bae | 2306 | path = add_prefix(prefix, argv[i + 1]); |
cee7f245 JH |
2307 | final_commit_name = argv[i]; |
2308 | } | |
2309 | } | |
2310 | else if (i != argc - 1) | |
acca687f | 2311 | usage(blame_usage); /* garbage at end */ |
cee7f245 | 2312 | |
354e6534 | 2313 | setup_work_tree(); |
cee7f245 JH |
2314 | if (!has_path_in_work_tree(path)) |
2315 | die("cannot stat path %s: %s", | |
2316 | path, strerror(errno)); | |
2317 | } | |
2318 | } | |
2319 | ||
2320 | if (final_commit_name) | |
2321 | argv[unk++] = final_commit_name; | |
2322 | ||
1732a1fd JH |
2323 | /* |
2324 | * Now we got rev and path. We do not want the path pruning | |
cee7f245 JH |
2325 | * but we may want "bottom" processing. |
2326 | */ | |
6bee4e40 | 2327 | argv[unk++] = "--"; /* terminate the rev name */ |
cee7f245 JH |
2328 | argv[unk] = NULL; |
2329 | ||
2330 | init_revisions(&revs, NULL); | |
1cfe7733 | 2331 | setup_revisions(unk, argv, &revs, NULL); |
cee7f245 JH |
2332 | memset(&sb, 0, sizeof(sb)); |
2333 | ||
1732a1fd JH |
2334 | /* |
2335 | * There must be one and only one positive commit in the | |
cee7f245 JH |
2336 | * revs->pending array. |
2337 | */ | |
2338 | for (i = 0; i < revs.pending.nr; i++) { | |
2339 | struct object *obj = revs.pending.objects[i].item; | |
2340 | if (obj->flags & UNINTERESTING) | |
2341 | continue; | |
2342 | while (obj->type == OBJ_TAG) | |
2343 | obj = deref_tag(obj, NULL, 0); | |
2344 | if (obj->type != OBJ_COMMIT) | |
2345 | die("Non commit %s?", | |
2346 | revs.pending.objects[i].name); | |
2347 | if (sb.final) | |
2348 | die("More than one commit to dig from %s and %s?", | |
2349 | revs.pending.objects[i].name, | |
2350 | final_commit_name); | |
2351 | sb.final = (struct commit *) obj; | |
2352 | final_commit_name = revs.pending.objects[i].name; | |
2353 | } | |
2354 | ||
2355 | if (!sb.final) { | |
1732a1fd JH |
2356 | /* |
2357 | * "--not A B -- path" without anything positive; | |
1cfe7733 JH |
2358 | * do not default to HEAD, but use the working tree |
2359 | * or "--contents". | |
1732a1fd | 2360 | */ |
1981820b | 2361 | setup_work_tree(); |
1cfe7733 JH |
2362 | sb.final = fake_working_tree_commit(path, contents_from); |
2363 | add_pending_object(&revs, &(sb.final->object), ":"); | |
cee7f245 | 2364 | } |
1cfe7733 JH |
2365 | else if (contents_from) |
2366 | die("Cannot use --contents with final commit object name"); | |
cee7f245 | 2367 | |
1732a1fd JH |
2368 | /* |
2369 | * If we have bottom, this will mark the ancestors of the | |
cee7f245 JH |
2370 | * bottom commits we would reach while traversing as |
2371 | * uninteresting. | |
2372 | */ | |
2373 | prepare_revision_walk(&revs); | |
2374 | ||
1cfe7733 JH |
2375 | if (is_null_sha1(sb.final->object.sha1)) { |
2376 | char *buf; | |
2377 | o = sb.final->util; | |
2378 | buf = xmalloc(o->file.size + 1); | |
2379 | memcpy(buf, o->file.ptr, o->file.size + 1); | |
2380 | sb.final_buf = buf; | |
2381 | sb.final_buf_size = o->file.size; | |
2382 | } | |
2383 | else { | |
2384 | o = get_origin(&sb, sb.final, path); | |
2385 | if (fill_blob_sha1(o)) | |
2386 | die("no such path %s in %s", path, final_commit_name); | |
cee7f245 | 2387 | |
21666f1a | 2388 | sb.final_buf = read_sha1_file(o->blob_sha1, &type, |
1cfe7733 | 2389 | &sb.final_buf_size); |
ab43e495 JH |
2390 | if (!sb.final_buf) |
2391 | die("Cannot read blob %s for path %s", | |
2392 | sha1_to_hex(o->blob_sha1), | |
2393 | path); | |
1cfe7733 | 2394 | } |
c2e525d9 | 2395 | num_read_blob++; |
cee7f245 JH |
2396 | lno = prepare_lines(&sb); |
2397 | ||
931233bc JH |
2398 | bottom = top = 0; |
2399 | if (bottomtop) | |
2400 | prepare_blame_range(&sb, bottomtop, lno, &bottom, &top); | |
2401 | if (bottom && top && top < bottom) { | |
2402 | long tmp; | |
2403 | tmp = top; top = bottom; bottom = tmp; | |
2404 | } | |
cee7f245 JH |
2405 | if (bottom < 1) |
2406 | bottom = 1; | |
2407 | if (top < 1) | |
2408 | top = lno; | |
2409 | bottom--; | |
2410 | if (lno < top) | |
2411 | die("file %s has only %lu lines", path, lno); | |
2412 | ||
2413 | ent = xcalloc(1, sizeof(*ent)); | |
2414 | ent->lno = bottom; | |
2415 | ent->num_lines = top - bottom; | |
2416 | ent->suspect = o; | |
2417 | ent->s_lno = bottom; | |
2418 | ||
2419 | sb.ent = ent; | |
2420 | sb.path = path; | |
2421 | ||
2422 | if (revs_file && read_ancestry(revs_file)) | |
2423 | die("reading graft file %s failed: %s", | |
2424 | revs_file, strerror(errno)); | |
2425 | ||
50acc589 | 2426 | read_mailmap(&mailmap, ".mailmap", NULL); |
f9567384 | 2427 | |
b92565dc MH |
2428 | if (!incremental) |
2429 | setup_pager(); | |
2430 | ||
d24bba80 | 2431 | assign_blame(&sb, &revs, opt); |
cee7f245 | 2432 | |
717d1462 LT |
2433 | if (incremental) |
2434 | return 0; | |
2435 | ||
cee7f245 JH |
2436 | coalesce(&sb); |
2437 | ||
2438 | if (!(output_option & OUTPUT_PORCELAIN)) | |
2439 | find_alignment(&sb, &output_option); | |
2440 | ||
2441 | output(&sb, output_option); | |
2442 | free((void *)sb.final_buf); | |
2443 | for (ent = sb.ent; ent; ) { | |
2444 | struct blame_entry *e = ent->next; | |
2445 | free(ent); | |
2446 | ent = e; | |
2447 | } | |
c2e525d9 | 2448 | |
870b39c1 | 2449 | if (show_stats) { |
c2e525d9 JH |
2450 | printf("num read blob: %d\n", num_read_blob); |
2451 | printf("num get patch: %d\n", num_get_patch); | |
2452 | printf("num commits: %d\n", num_commits); | |
2453 | } | |
cee7f245 JH |
2454 | return 0; |
2455 | } |