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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" |
cee7f245 | 19 | |
acca687f | 20 | static char blame_usage[] = |
06e75a72 | 21 | "git-blame [-c] [-l] [-t] [-f] [-n] [-p] [-L n,m] [-S <revs-file>] [-M] [-C] [-C] [--contents <filename>] [--incremental] [commit] [--] file\n" |
635f4a30 | 22 | " -c Use the same output mode as git-annotate (Default: off)\n" |
4c10a5ca | 23 | " -b Show blank SHA-1 for boundary commits (Default: off)\n" |
635f4a30 | 24 | " -l Show long commit SHA1 (Default: off)\n" |
4c10a5ca | 25 | " --root Do not treat root commits as boundaries (Default: off)\n" |
635f4a30 | 26 | " -t Show raw timestamp (Default: off)\n" |
cee7f245 JH |
27 | " -f, --show-name Show original filename (Default: auto)\n" |
28 | " -n, --show-number Show original linenumber (Default: off)\n" | |
29 | " -p, --porcelain Show in a format designed for machine consumption\n" | |
30 | " -L n,m Process only line range n,m, counting from 1\n" | |
18abd745 | 31 | " -M, -C Find line movements within and across files\n" |
717d1462 | 32 | " --incremental Show blame entries as we find them, incrementally\n" |
1cfe7733 | 33 | " --contents file Use <file>'s contents as the final image\n" |
cee7f245 JH |
34 | " -S revs-file Use revisions from revs-file instead of calling git-rev-list\n"; |
35 | ||
36 | static int longest_file; | |
37 | static int longest_author; | |
38 | static int max_orig_digits; | |
39 | static int max_digits; | |
5ff62c30 | 40 | static int max_score_digits; |
4c10a5ca JH |
41 | static int show_root; |
42 | static int blank_boundary; | |
717d1462 | 43 | static int incremental; |
e68989a7 | 44 | static int cmd_is_annotate; |
cee7f245 | 45 | |
54a4c617 JH |
46 | #ifndef DEBUG |
47 | #define DEBUG 0 | |
48 | #endif | |
49 | ||
c2e525d9 JH |
50 | /* stats */ |
51 | static int num_read_blob; | |
52 | static int num_get_patch; | |
53 | static int num_commits; | |
54 | ||
d24bba80 | 55 | #define PICKAXE_BLAME_MOVE 01 |
18abd745 JH |
56 | #define PICKAXE_BLAME_COPY 02 |
57 | #define PICKAXE_BLAME_COPY_HARDER 04 | |
d24bba80 | 58 | |
4a0fc95f JH |
59 | /* |
60 | * blame for a blame_entry with score lower than these thresholds | |
61 | * is not passed to the parent using move/copy logic. | |
62 | */ | |
63 | static unsigned blame_move_score; | |
64 | static unsigned blame_copy_score; | |
65 | #define BLAME_DEFAULT_MOVE_SCORE 20 | |
66 | #define BLAME_DEFAULT_COPY_SCORE 40 | |
67 | ||
cee7f245 JH |
68 | /* bits #0..7 in revision.h, #8..11 used for merge_bases() in commit.c */ |
69 | #define METAINFO_SHOWN (1u<<12) | |
70 | #define MORE_THAN_ONE_PATH (1u<<13) | |
71 | ||
72 | /* | |
54a4c617 | 73 | * One blob in a commit that is being suspected |
cee7f245 JH |
74 | */ |
75 | struct origin { | |
54a4c617 | 76 | int refcnt; |
cee7f245 | 77 | struct commit *commit; |
c2e525d9 | 78 | mmfile_t file; |
cee7f245 JH |
79 | unsigned char blob_sha1[20]; |
80 | char path[FLEX_ARRAY]; | |
81 | }; | |
82 | ||
1732a1fd JH |
83 | /* |
84 | * Given an origin, prepare mmfile_t structure to be used by the | |
85 | * diff machinery | |
86 | */ | |
c2e525d9 JH |
87 | static char *fill_origin_blob(struct origin *o, mmfile_t *file) |
88 | { | |
89 | if (!o->file.ptr) { | |
21666f1a | 90 | enum object_type type; |
c2e525d9 | 91 | num_read_blob++; |
21666f1a | 92 | file->ptr = read_sha1_file(o->blob_sha1, &type, |
c2e525d9 JH |
93 | (unsigned long *)(&(file->size))); |
94 | o->file = *file; | |
95 | } | |
96 | else | |
97 | *file = o->file; | |
98 | return file->ptr; | |
99 | } | |
100 | ||
1732a1fd JH |
101 | /* |
102 | * Origin is refcounted and usually we keep the blob contents to be | |
103 | * reused. | |
104 | */ | |
54a4c617 JH |
105 | static inline struct origin *origin_incref(struct origin *o) |
106 | { | |
107 | if (o) | |
108 | o->refcnt++; | |
109 | return o; | |
110 | } | |
111 | ||
112 | static void origin_decref(struct origin *o) | |
113 | { | |
114 | if (o && --o->refcnt <= 0) { | |
c2e525d9 JH |
115 | if (o->file.ptr) |
116 | free(o->file.ptr); | |
54a4c617 JH |
117 | memset(o, 0, sizeof(*o)); |
118 | free(o); | |
119 | } | |
120 | } | |
121 | ||
1732a1fd JH |
122 | /* |
123 | * Each group of lines is described by a blame_entry; it can be split | |
124 | * as we pass blame to the parents. They form a linked list in the | |
125 | * scoreboard structure, sorted by the target line number. | |
126 | */ | |
cee7f245 JH |
127 | struct blame_entry { |
128 | struct blame_entry *prev; | |
129 | struct blame_entry *next; | |
130 | ||
131 | /* the first line of this group in the final image; | |
132 | * internally all line numbers are 0 based. | |
133 | */ | |
134 | int lno; | |
135 | ||
136 | /* how many lines this group has */ | |
137 | int num_lines; | |
138 | ||
139 | /* the commit that introduced this group into the final image */ | |
140 | struct origin *suspect; | |
141 | ||
142 | /* true if the suspect is truly guilty; false while we have not | |
143 | * checked if the group came from one of its parents. | |
144 | */ | |
145 | char guilty; | |
146 | ||
147 | /* the line number of the first line of this group in the | |
148 | * suspect's file; internally all line numbers are 0 based. | |
149 | */ | |
150 | int s_lno; | |
5ff62c30 JH |
151 | |
152 | /* how significant this entry is -- cached to avoid | |
1732a1fd | 153 | * scanning the lines over and over. |
5ff62c30 JH |
154 | */ |
155 | unsigned score; | |
cee7f245 JH |
156 | }; |
157 | ||
1732a1fd JH |
158 | /* |
159 | * The current state of the blame assignment. | |
160 | */ | |
cee7f245 JH |
161 | struct scoreboard { |
162 | /* the final commit (i.e. where we started digging from) */ | |
163 | struct commit *final; | |
164 | ||
165 | const char *path; | |
166 | ||
1732a1fd JH |
167 | /* |
168 | * The contents in the final image. | |
169 | * Used by many functions to obtain contents of the nth line, | |
170 | * indexed with scoreboard.lineno[blame_entry.lno]. | |
cee7f245 JH |
171 | */ |
172 | const char *final_buf; | |
173 | unsigned long final_buf_size; | |
174 | ||
175 | /* linked list of blames */ | |
176 | struct blame_entry *ent; | |
177 | ||
612702e8 | 178 | /* look-up a line in the final buffer */ |
cee7f245 JH |
179 | int num_lines; |
180 | int *lineno; | |
181 | }; | |
182 | ||
171dccd5 | 183 | static inline int same_suspect(struct origin *a, struct origin *b) |
46014766 | 184 | { |
171dccd5 | 185 | if (a == b) |
57584d9e | 186 | return 1; |
171dccd5 JH |
187 | if (a->commit != b->commit) |
188 | return 0; | |
189 | return !strcmp(a->path, b->path); | |
46014766 JH |
190 | } |
191 | ||
54a4c617 JH |
192 | static void sanity_check_refcnt(struct scoreboard *); |
193 | ||
1732a1fd JH |
194 | /* |
195 | * If two blame entries that are next to each other came from | |
196 | * contiguous lines in the same origin (i.e. <commit, path> pair), | |
197 | * merge them together. | |
198 | */ | |
cee7f245 JH |
199 | static void coalesce(struct scoreboard *sb) |
200 | { | |
201 | struct blame_entry *ent, *next; | |
202 | ||
203 | for (ent = sb->ent; ent && (next = ent->next); ent = next) { | |
171dccd5 | 204 | if (same_suspect(ent->suspect, next->suspect) && |
cee7f245 JH |
205 | ent->guilty == next->guilty && |
206 | ent->s_lno + ent->num_lines == next->s_lno) { | |
207 | ent->num_lines += next->num_lines; | |
208 | ent->next = next->next; | |
209 | if (ent->next) | |
210 | ent->next->prev = ent; | |
54a4c617 | 211 | origin_decref(next->suspect); |
cee7f245 | 212 | free(next); |
46014766 | 213 | ent->score = 0; |
cee7f245 JH |
214 | next = ent; /* again */ |
215 | } | |
216 | } | |
54a4c617 JH |
217 | |
218 | if (DEBUG) /* sanity */ | |
219 | sanity_check_refcnt(sb); | |
cee7f245 JH |
220 | } |
221 | ||
1732a1fd JH |
222 | /* |
223 | * Given a commit and a path in it, create a new origin structure. | |
224 | * The callers that add blame to the scoreboard should use | |
225 | * get_origin() to obtain shared, refcounted copy instead of calling | |
226 | * this function directly. | |
227 | */ | |
854b97f6 JH |
228 | static struct origin *make_origin(struct commit *commit, const char *path) |
229 | { | |
230 | struct origin *o; | |
231 | o = xcalloc(1, sizeof(*o) + strlen(path) + 1); | |
232 | o->commit = commit; | |
233 | o->refcnt = 1; | |
234 | strcpy(o->path, path); | |
235 | return o; | |
236 | } | |
237 | ||
1732a1fd JH |
238 | /* |
239 | * Locate an existing origin or create a new one. | |
240 | */ | |
f6c0e191 JH |
241 | static struct origin *get_origin(struct scoreboard *sb, |
242 | struct commit *commit, | |
243 | const char *path) | |
cee7f245 | 244 | { |
f6c0e191 | 245 | struct blame_entry *e; |
cee7f245 | 246 | |
f6c0e191 JH |
247 | for (e = sb->ent; e; e = e->next) { |
248 | if (e->suspect->commit == commit && | |
249 | !strcmp(e->suspect->path, path)) | |
54a4c617 | 250 | return origin_incref(e->suspect); |
cee7f245 | 251 | } |
854b97f6 | 252 | return make_origin(commit, path); |
cee7f245 JH |
253 | } |
254 | ||
1732a1fd JH |
255 | /* |
256 | * Fill the blob_sha1 field of an origin if it hasn't, so that later | |
257 | * call to fill_origin_blob() can use it to locate the data. blob_sha1 | |
258 | * for an origin is also used to pass the blame for the entire file to | |
259 | * the parent to detect the case where a child's blob is identical to | |
260 | * that of its parent's. | |
261 | */ | |
f6c0e191 JH |
262 | static int fill_blob_sha1(struct origin *origin) |
263 | { | |
264 | unsigned mode; | |
f6c0e191 JH |
265 | |
266 | if (!is_null_sha1(origin->blob_sha1)) | |
267 | return 0; | |
268 | if (get_tree_entry(origin->commit->object.sha1, | |
269 | origin->path, | |
270 | origin->blob_sha1, &mode)) | |
271 | goto error_out; | |
21666f1a | 272 | if (sha1_object_info(origin->blob_sha1, NULL) != OBJ_BLOB) |
f6c0e191 JH |
273 | goto error_out; |
274 | return 0; | |
275 | error_out: | |
276 | hashclr(origin->blob_sha1); | |
277 | return -1; | |
278 | } | |
279 | ||
1732a1fd JH |
280 | /* |
281 | * We have an origin -- check if the same path exists in the | |
282 | * parent and return an origin structure to represent it. | |
283 | */ | |
f6c0e191 | 284 | static struct origin *find_origin(struct scoreboard *sb, |
cee7f245 JH |
285 | struct commit *parent, |
286 | struct origin *origin) | |
287 | { | |
288 | struct origin *porigin = NULL; | |
289 | struct diff_options diff_opts; | |
f6c0e191 JH |
290 | const char *paths[2]; |
291 | ||
0d981c67 | 292 | if (parent->util) { |
1732a1fd JH |
293 | /* |
294 | * Each commit object can cache one origin in that | |
295 | * commit. This is a freestanding copy of origin and | |
296 | * not refcounted. | |
854b97f6 | 297 | */ |
0d981c67 | 298 | struct origin *cached = parent->util; |
854b97f6 | 299 | if (!strcmp(cached->path, origin->path)) { |
1732a1fd JH |
300 | /* |
301 | * The same path between origin and its parent | |
302 | * without renaming -- the most common case. | |
303 | */ | |
854b97f6 | 304 | porigin = get_origin(sb, parent, cached->path); |
1732a1fd JH |
305 | |
306 | /* | |
307 | * If the origin was newly created (i.e. get_origin | |
308 | * would call make_origin if none is found in the | |
309 | * scoreboard), it does not know the blob_sha1, | |
310 | * so copy it. Otherwise porigin was in the | |
311 | * scoreboard and already knows blob_sha1. | |
312 | */ | |
854b97f6 JH |
313 | if (porigin->refcnt == 1) |
314 | hashcpy(porigin->blob_sha1, cached->blob_sha1); | |
315 | return porigin; | |
316 | } | |
317 | /* otherwise it was not very useful; free it */ | |
318 | free(parent->util); | |
319 | parent->util = NULL; | |
0d981c67 JH |
320 | } |
321 | ||
f6c0e191 JH |
322 | /* See if the origin->path is different between parent |
323 | * and origin first. Most of the time they are the | |
324 | * same and diff-tree is fairly efficient about this. | |
325 | */ | |
326 | diff_setup(&diff_opts); | |
327 | diff_opts.recursive = 1; | |
328 | diff_opts.detect_rename = 0; | |
329 | diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
330 | paths[0] = origin->path; | |
331 | paths[1] = NULL; | |
332 | ||
333 | diff_tree_setup_paths(paths, &diff_opts); | |
334 | if (diff_setup_done(&diff_opts) < 0) | |
335 | die("diff-setup"); | |
1cfe7733 JH |
336 | |
337 | if (is_null_sha1(origin->commit->object.sha1)) | |
338 | do_diff_cache(parent->tree->object.sha1, &diff_opts); | |
339 | else | |
340 | diff_tree_sha1(parent->tree->object.sha1, | |
341 | origin->commit->tree->object.sha1, | |
342 | "", &diff_opts); | |
f6c0e191 JH |
343 | diffcore_std(&diff_opts); |
344 | ||
345 | /* It is either one entry that says "modified", or "created", | |
346 | * or nothing. | |
347 | */ | |
348 | if (!diff_queued_diff.nr) { | |
349 | /* The path is the same as parent */ | |
350 | porigin = get_origin(sb, parent, origin->path); | |
351 | hashcpy(porigin->blob_sha1, origin->blob_sha1); | |
352 | } | |
353 | else if (diff_queued_diff.nr != 1) | |
acca687f | 354 | die("internal error in blame::find_origin"); |
f6c0e191 JH |
355 | else { |
356 | struct diff_filepair *p = diff_queued_diff.queue[0]; | |
357 | switch (p->status) { | |
358 | default: | |
acca687f | 359 | die("internal error in blame::find_origin (%c)", |
f6c0e191 JH |
360 | p->status); |
361 | case 'M': | |
362 | porigin = get_origin(sb, parent, origin->path); | |
363 | hashcpy(porigin->blob_sha1, p->one->sha1); | |
364 | break; | |
365 | case 'A': | |
366 | case 'T': | |
367 | /* Did not exist in parent, or type changed */ | |
368 | break; | |
369 | } | |
370 | } | |
371 | diff_flush(&diff_opts); | |
0d981c67 | 372 | if (porigin) { |
1732a1fd JH |
373 | /* |
374 | * Create a freestanding copy that is not part of | |
375 | * the refcounted origin found in the scoreboard, and | |
376 | * cache it in the commit. | |
377 | */ | |
854b97f6 | 378 | struct origin *cached; |
1732a1fd | 379 | |
854b97f6 JH |
380 | cached = make_origin(porigin->commit, porigin->path); |
381 | hashcpy(cached->blob_sha1, porigin->blob_sha1); | |
382 | parent->util = cached; | |
0d981c67 | 383 | } |
f69e743d JH |
384 | return porigin; |
385 | } | |
f6c0e191 | 386 | |
1732a1fd JH |
387 | /* |
388 | * We have an origin -- find the path that corresponds to it in its | |
389 | * parent and return an origin structure to represent it. | |
390 | */ | |
f69e743d JH |
391 | static struct origin *find_rename(struct scoreboard *sb, |
392 | struct commit *parent, | |
393 | struct origin *origin) | |
394 | { | |
395 | struct origin *porigin = NULL; | |
396 | struct diff_options diff_opts; | |
397 | int i; | |
398 | const char *paths[2]; | |
cee7f245 JH |
399 | |
400 | diff_setup(&diff_opts); | |
401 | diff_opts.recursive = 1; | |
402 | diff_opts.detect_rename = DIFF_DETECT_RENAME; | |
403 | diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
2f3f8b21 | 404 | diff_opts.single_follow = origin->path; |
cee7f245 JH |
405 | paths[0] = NULL; |
406 | diff_tree_setup_paths(paths, &diff_opts); | |
407 | if (diff_setup_done(&diff_opts) < 0) | |
408 | die("diff-setup"); | |
1cfe7733 JH |
409 | |
410 | if (is_null_sha1(origin->commit->object.sha1)) | |
411 | do_diff_cache(parent->tree->object.sha1, &diff_opts); | |
412 | else | |
413 | diff_tree_sha1(parent->tree->object.sha1, | |
414 | origin->commit->tree->object.sha1, | |
415 | "", &diff_opts); | |
cee7f245 JH |
416 | diffcore_std(&diff_opts); |
417 | ||
418 | for (i = 0; i < diff_queued_diff.nr; i++) { | |
419 | struct diff_filepair *p = diff_queued_diff.queue[i]; | |
612702e8 | 420 | if ((p->status == 'R' || p->status == 'C') && |
f6c0e191 JH |
421 | !strcmp(p->two->path, origin->path)) { |
422 | porigin = get_origin(sb, parent, p->one->path); | |
423 | hashcpy(porigin->blob_sha1, p->one->sha1); | |
cee7f245 JH |
424 | break; |
425 | } | |
426 | } | |
427 | diff_flush(&diff_opts); | |
428 | return porigin; | |
429 | } | |
430 | ||
1732a1fd JH |
431 | /* |
432 | * Parsing of patch chunks... | |
433 | */ | |
cee7f245 JH |
434 | struct chunk { |
435 | /* line number in postimage; up to but not including this | |
436 | * line is the same as preimage | |
437 | */ | |
438 | int same; | |
439 | ||
440 | /* preimage line number after this chunk */ | |
441 | int p_next; | |
442 | ||
443 | /* postimage line number after this chunk */ | |
444 | int t_next; | |
445 | }; | |
446 | ||
447 | struct patch { | |
448 | struct chunk *chunks; | |
449 | int num; | |
450 | }; | |
451 | ||
452 | struct blame_diff_state { | |
453 | struct xdiff_emit_state xm; | |
454 | struct patch *ret; | |
455 | unsigned hunk_post_context; | |
456 | unsigned hunk_in_pre_context : 1; | |
457 | }; | |
458 | ||
459 | static void process_u_diff(void *state_, char *line, unsigned long len) | |
460 | { | |
461 | struct blame_diff_state *state = state_; | |
462 | struct chunk *chunk; | |
463 | int off1, off2, len1, len2, num; | |
464 | ||
cee7f245 JH |
465 | num = state->ret->num; |
466 | if (len < 4 || line[0] != '@' || line[1] != '@') { | |
467 | if (state->hunk_in_pre_context && line[0] == ' ') | |
468 | state->ret->chunks[num - 1].same++; | |
469 | else { | |
470 | state->hunk_in_pre_context = 0; | |
471 | if (line[0] == ' ') | |
472 | state->hunk_post_context++; | |
473 | else | |
474 | state->hunk_post_context = 0; | |
475 | } | |
476 | return; | |
477 | } | |
478 | ||
479 | if (num && state->hunk_post_context) { | |
480 | chunk = &state->ret->chunks[num - 1]; | |
481 | chunk->p_next -= state->hunk_post_context; | |
482 | chunk->t_next -= state->hunk_post_context; | |
483 | } | |
484 | state->ret->num = ++num; | |
485 | state->ret->chunks = xrealloc(state->ret->chunks, | |
486 | sizeof(struct chunk) * num); | |
487 | chunk = &state->ret->chunks[num - 1]; | |
488 | if (parse_hunk_header(line, len, &off1, &len1, &off2, &len2)) { | |
489 | state->ret->num--; | |
490 | return; | |
491 | } | |
492 | ||
493 | /* Line numbers in patch output are one based. */ | |
494 | off1--; | |
495 | off2--; | |
496 | ||
497 | chunk->same = len2 ? off2 : (off2 + 1); | |
498 | ||
499 | chunk->p_next = off1 + (len1 ? len1 : 1); | |
500 | chunk->t_next = chunk->same + len2; | |
501 | state->hunk_in_pre_context = 1; | |
502 | state->hunk_post_context = 0; | |
503 | } | |
504 | ||
505 | static struct patch *compare_buffer(mmfile_t *file_p, mmfile_t *file_o, | |
506 | int context) | |
507 | { | |
508 | struct blame_diff_state state; | |
509 | xpparam_t xpp; | |
510 | xdemitconf_t xecfg; | |
511 | xdemitcb_t ecb; | |
512 | ||
513 | xpp.flags = XDF_NEED_MINIMAL; | |
514 | xecfg.ctxlen = context; | |
515 | xecfg.flags = 0; | |
516 | ecb.outf = xdiff_outf; | |
517 | ecb.priv = &state; | |
518 | memset(&state, 0, sizeof(state)); | |
519 | state.xm.consume = process_u_diff; | |
520 | state.ret = xmalloc(sizeof(struct patch)); | |
521 | state.ret->chunks = NULL; | |
522 | state.ret->num = 0; | |
523 | ||
524 | xdl_diff(file_p, file_o, &xpp, &xecfg, &ecb); | |
525 | ||
526 | if (state.ret->num) { | |
527 | struct chunk *chunk; | |
528 | chunk = &state.ret->chunks[state.ret->num - 1]; | |
529 | chunk->p_next -= state.hunk_post_context; | |
530 | chunk->t_next -= state.hunk_post_context; | |
531 | } | |
532 | return state.ret; | |
533 | } | |
534 | ||
1732a1fd JH |
535 | /* |
536 | * Run diff between two origins and grab the patch output, so that | |
537 | * we can pass blame for lines origin is currently suspected for | |
538 | * to its parent. | |
539 | */ | |
cee7f245 JH |
540 | static struct patch *get_patch(struct origin *parent, struct origin *origin) |
541 | { | |
542 | mmfile_t file_p, file_o; | |
cee7f245 JH |
543 | struct patch *patch; |
544 | ||
c2e525d9 JH |
545 | fill_origin_blob(parent, &file_p); |
546 | fill_origin_blob(origin, &file_o); | |
547 | if (!file_p.ptr || !file_o.ptr) | |
cee7f245 | 548 | return NULL; |
cee7f245 | 549 | patch = compare_buffer(&file_p, &file_o, 0); |
c2e525d9 | 550 | num_get_patch++; |
cee7f245 JH |
551 | return patch; |
552 | } | |
553 | ||
554 | static void free_patch(struct patch *p) | |
555 | { | |
556 | free(p->chunks); | |
557 | free(p); | |
558 | } | |
559 | ||
1732a1fd | 560 | /* |
3dff5379 | 561 | * Link in a new blame entry to the scoreboard. Entries that cover the |
1732a1fd JH |
562 | * same line range have been removed from the scoreboard previously. |
563 | */ | |
cee7f245 JH |
564 | static void add_blame_entry(struct scoreboard *sb, struct blame_entry *e) |
565 | { | |
566 | struct blame_entry *ent, *prev = NULL; | |
567 | ||
54a4c617 JH |
568 | origin_incref(e->suspect); |
569 | ||
cee7f245 JH |
570 | for (ent = sb->ent; ent && ent->lno < e->lno; ent = ent->next) |
571 | prev = ent; | |
572 | ||
573 | /* prev, if not NULL, is the last one that is below e */ | |
574 | e->prev = prev; | |
575 | if (prev) { | |
576 | e->next = prev->next; | |
577 | prev->next = e; | |
578 | } | |
579 | else { | |
580 | e->next = sb->ent; | |
581 | sb->ent = e; | |
582 | } | |
583 | if (e->next) | |
584 | e->next->prev = e; | |
585 | } | |
586 | ||
1732a1fd JH |
587 | /* |
588 | * src typically is on-stack; we want to copy the information in it to | |
589 | * an malloced blame_entry that is already on the linked list of the | |
590 | * scoreboard. The origin of dst loses a refcnt while the origin of src | |
591 | * gains one. | |
592 | */ | |
cee7f245 JH |
593 | static void dup_entry(struct blame_entry *dst, struct blame_entry *src) |
594 | { | |
595 | struct blame_entry *p, *n; | |
54a4c617 | 596 | |
cee7f245 JH |
597 | p = dst->prev; |
598 | n = dst->next; | |
54a4c617 JH |
599 | origin_incref(src->suspect); |
600 | origin_decref(dst->suspect); | |
cee7f245 JH |
601 | memcpy(dst, src, sizeof(*src)); |
602 | dst->prev = p; | |
603 | dst->next = n; | |
5ff62c30 | 604 | dst->score = 0; |
cee7f245 JH |
605 | } |
606 | ||
607 | static const char *nth_line(struct scoreboard *sb, int lno) | |
608 | { | |
609 | return sb->final_buf + sb->lineno[lno]; | |
610 | } | |
611 | ||
1732a1fd JH |
612 | /* |
613 | * It is known that lines between tlno to same came from parent, and e | |
614 | * has an overlap with that range. it also is known that parent's | |
615 | * line plno corresponds to e's line tlno. | |
616 | * | |
617 | * <---- e -----> | |
618 | * <------> | |
619 | * <------------> | |
620 | * <------------> | |
621 | * <------------------> | |
622 | * | |
623 | * Split e into potentially three parts; before this chunk, the chunk | |
624 | * to be blamed for the parent, and after that portion. | |
625 | */ | |
54a4c617 | 626 | static void split_overlap(struct blame_entry *split, |
cee7f245 JH |
627 | struct blame_entry *e, |
628 | int tlno, int plno, int same, | |
629 | struct origin *parent) | |
630 | { | |
cee7f245 JH |
631 | int chunk_end_lno; |
632 | memset(split, 0, sizeof(struct blame_entry [3])); | |
633 | ||
634 | if (e->s_lno < tlno) { | |
635 | /* there is a pre-chunk part not blamed on parent */ | |
54a4c617 | 636 | split[0].suspect = origin_incref(e->suspect); |
cee7f245 JH |
637 | split[0].lno = e->lno; |
638 | split[0].s_lno = e->s_lno; | |
639 | split[0].num_lines = tlno - e->s_lno; | |
640 | split[1].lno = e->lno + tlno - e->s_lno; | |
641 | split[1].s_lno = plno; | |
642 | } | |
643 | else { | |
644 | split[1].lno = e->lno; | |
645 | split[1].s_lno = plno + (e->s_lno - tlno); | |
646 | } | |
647 | ||
648 | if (same < e->s_lno + e->num_lines) { | |
649 | /* there is a post-chunk part not blamed on parent */ | |
54a4c617 | 650 | split[2].suspect = origin_incref(e->suspect); |
cee7f245 JH |
651 | split[2].lno = e->lno + (same - e->s_lno); |
652 | split[2].s_lno = e->s_lno + (same - e->s_lno); | |
653 | split[2].num_lines = e->s_lno + e->num_lines - same; | |
654 | chunk_end_lno = split[2].lno; | |
655 | } | |
656 | else | |
657 | chunk_end_lno = e->lno + e->num_lines; | |
658 | split[1].num_lines = chunk_end_lno - split[1].lno; | |
659 | ||
1732a1fd JH |
660 | /* |
661 | * if it turns out there is nothing to blame the parent for, | |
662 | * forget about the splitting. !split[1].suspect signals this. | |
663 | */ | |
cee7f245 JH |
664 | if (split[1].num_lines < 1) |
665 | return; | |
54a4c617 | 666 | split[1].suspect = origin_incref(parent); |
cee7f245 JH |
667 | } |
668 | ||
1732a1fd JH |
669 | /* |
670 | * split_overlap() divided an existing blame e into up to three parts | |
671 | * in split. Adjust the linked list of blames in the scoreboard to | |
672 | * reflect the split. | |
673 | */ | |
cee7f245 | 674 | static void split_blame(struct scoreboard *sb, |
54a4c617 | 675 | struct blame_entry *split, |
cee7f245 JH |
676 | struct blame_entry *e) |
677 | { | |
678 | struct blame_entry *new_entry; | |
679 | ||
680 | if (split[0].suspect && split[2].suspect) { | |
1732a1fd | 681 | /* The first part (reuse storage for the existing entry e) */ |
cee7f245 JH |
682 | dup_entry(e, &split[0]); |
683 | ||
1732a1fd | 684 | /* The last part -- me */ |
cee7f245 JH |
685 | new_entry = xmalloc(sizeof(*new_entry)); |
686 | memcpy(new_entry, &(split[2]), sizeof(struct blame_entry)); | |
687 | add_blame_entry(sb, new_entry); | |
688 | ||
1732a1fd | 689 | /* ... and the middle part -- parent */ |
cee7f245 JH |
690 | new_entry = xmalloc(sizeof(*new_entry)); |
691 | memcpy(new_entry, &(split[1]), sizeof(struct blame_entry)); | |
692 | add_blame_entry(sb, new_entry); | |
693 | } | |
694 | else if (!split[0].suspect && !split[2].suspect) | |
1732a1fd JH |
695 | /* |
696 | * The parent covers the entire area; reuse storage for | |
697 | * e and replace it with the parent. | |
698 | */ | |
cee7f245 JH |
699 | dup_entry(e, &split[1]); |
700 | else if (split[0].suspect) { | |
1732a1fd | 701 | /* me and then parent */ |
cee7f245 JH |
702 | dup_entry(e, &split[0]); |
703 | ||
704 | new_entry = xmalloc(sizeof(*new_entry)); | |
705 | memcpy(new_entry, &(split[1]), sizeof(struct blame_entry)); | |
706 | add_blame_entry(sb, new_entry); | |
707 | } | |
708 | else { | |
1732a1fd | 709 | /* parent and then me */ |
cee7f245 JH |
710 | dup_entry(e, &split[1]); |
711 | ||
712 | new_entry = xmalloc(sizeof(*new_entry)); | |
713 | memcpy(new_entry, &(split[2]), sizeof(struct blame_entry)); | |
714 | add_blame_entry(sb, new_entry); | |
715 | } | |
716 | ||
54a4c617 | 717 | if (DEBUG) { /* sanity */ |
cee7f245 | 718 | struct blame_entry *ent; |
612702e8 | 719 | int lno = sb->ent->lno, corrupt = 0; |
cee7f245 JH |
720 | |
721 | for (ent = sb->ent; ent; ent = ent->next) { | |
722 | if (lno != ent->lno) | |
723 | corrupt = 1; | |
724 | if (ent->s_lno < 0) | |
725 | corrupt = 1; | |
726 | lno += ent->num_lines; | |
727 | } | |
728 | if (corrupt) { | |
612702e8 | 729 | lno = sb->ent->lno; |
cee7f245 JH |
730 | for (ent = sb->ent; ent; ent = ent->next) { |
731 | printf("L %8d l %8d n %8d\n", | |
732 | lno, ent->lno, ent->num_lines); | |
733 | lno = ent->lno + ent->num_lines; | |
734 | } | |
735 | die("oops"); | |
736 | } | |
737 | } | |
738 | } | |
739 | ||
1732a1fd JH |
740 | /* |
741 | * After splitting the blame, the origins used by the | |
742 | * on-stack blame_entry should lose one refcnt each. | |
743 | */ | |
54a4c617 JH |
744 | static void decref_split(struct blame_entry *split) |
745 | { | |
746 | int i; | |
747 | ||
748 | for (i = 0; i < 3; i++) | |
749 | origin_decref(split[i].suspect); | |
750 | } | |
751 | ||
1732a1fd JH |
752 | /* |
753 | * Helper for blame_chunk(). blame_entry e is known to overlap with | |
754 | * the patch hunk; split it and pass blame to the parent. | |
755 | */ | |
cee7f245 JH |
756 | static void blame_overlap(struct scoreboard *sb, struct blame_entry *e, |
757 | int tlno, int plno, int same, | |
758 | struct origin *parent) | |
759 | { | |
760 | struct blame_entry split[3]; | |
761 | ||
762 | split_overlap(split, e, tlno, plno, same, parent); | |
54a4c617 JH |
763 | if (split[1].suspect) |
764 | split_blame(sb, split, e); | |
765 | decref_split(split); | |
cee7f245 JH |
766 | } |
767 | ||
1732a1fd JH |
768 | /* |
769 | * Find the line number of the last line the target is suspected for. | |
770 | */ | |
cee7f245 JH |
771 | static int find_last_in_target(struct scoreboard *sb, struct origin *target) |
772 | { | |
773 | struct blame_entry *e; | |
774 | int last_in_target = -1; | |
775 | ||
776 | for (e = sb->ent; e; e = e->next) { | |
171dccd5 | 777 | if (e->guilty || !same_suspect(e->suspect, target)) |
cee7f245 JH |
778 | continue; |
779 | if (last_in_target < e->s_lno + e->num_lines) | |
780 | last_in_target = e->s_lno + e->num_lines; | |
781 | } | |
782 | return last_in_target; | |
783 | } | |
784 | ||
1732a1fd JH |
785 | /* |
786 | * Process one hunk from the patch between the current suspect for | |
787 | * blame_entry e and its parent. Find and split the overlap, and | |
788 | * pass blame to the overlapping part to the parent. | |
789 | */ | |
cee7f245 JH |
790 | static void blame_chunk(struct scoreboard *sb, |
791 | int tlno, int plno, int same, | |
792 | struct origin *target, struct origin *parent) | |
793 | { | |
612702e8 | 794 | struct blame_entry *e; |
cee7f245 | 795 | |
612702e8 | 796 | for (e = sb->ent; e; e = e->next) { |
171dccd5 | 797 | if (e->guilty || !same_suspect(e->suspect, target)) |
cee7f245 JH |
798 | continue; |
799 | if (same <= e->s_lno) | |
800 | continue; | |
801 | if (tlno < e->s_lno + e->num_lines) | |
802 | blame_overlap(sb, e, tlno, plno, same, parent); | |
803 | } | |
804 | } | |
805 | ||
1732a1fd JH |
806 | /* |
807 | * We are looking at the origin 'target' and aiming to pass blame | |
808 | * for the lines it is suspected to its parent. Run diff to find | |
809 | * which lines came from parent and pass blame for them. | |
810 | */ | |
cee7f245 JH |
811 | static int pass_blame_to_parent(struct scoreboard *sb, |
812 | struct origin *target, | |
813 | struct origin *parent) | |
814 | { | |
815 | int i, last_in_target, plno, tlno; | |
816 | struct patch *patch; | |
817 | ||
818 | last_in_target = find_last_in_target(sb, target); | |
819 | if (last_in_target < 0) | |
820 | return 1; /* nothing remains for this target */ | |
821 | ||
822 | patch = get_patch(parent, target); | |
823 | plno = tlno = 0; | |
824 | for (i = 0; i < patch->num; i++) { | |
825 | struct chunk *chunk = &patch->chunks[i]; | |
826 | ||
cee7f245 JH |
827 | blame_chunk(sb, tlno, plno, chunk->same, target, parent); |
828 | plno = chunk->p_next; | |
829 | tlno = chunk->t_next; | |
830 | } | |
1732a1fd | 831 | /* The rest (i.e. anything after tlno) are the same as the parent */ |
cee7f245 JH |
832 | blame_chunk(sb, tlno, plno, last_in_target, target, parent); |
833 | ||
834 | free_patch(patch); | |
835 | return 0; | |
836 | } | |
837 | ||
1732a1fd JH |
838 | /* |
839 | * The lines in blame_entry after splitting blames many times can become | |
840 | * very small and trivial, and at some point it becomes pointless to | |
841 | * blame the parents. E.g. "\t\t}\n\t}\n\n" appears everywhere in any | |
842 | * ordinary C program, and it is not worth to say it was copied from | |
843 | * totally unrelated file in the parent. | |
844 | * | |
845 | * Compute how trivial the lines in the blame_entry are. | |
846 | */ | |
5ff62c30 JH |
847 | static unsigned ent_score(struct scoreboard *sb, struct blame_entry *e) |
848 | { | |
849 | unsigned score; | |
850 | const char *cp, *ep; | |
851 | ||
852 | if (e->score) | |
853 | return e->score; | |
854 | ||
612702e8 | 855 | score = 1; |
5ff62c30 JH |
856 | cp = nth_line(sb, e->lno); |
857 | ep = nth_line(sb, e->lno + e->num_lines); | |
858 | while (cp < ep) { | |
859 | unsigned ch = *((unsigned char *)cp); | |
860 | if (isalnum(ch)) | |
861 | score++; | |
862 | cp++; | |
863 | } | |
864 | e->score = score; | |
865 | return score; | |
866 | } | |
867 | ||
1732a1fd JH |
868 | /* |
869 | * best_so_far[] and this[] are both a split of an existing blame_entry | |
870 | * that passes blame to the parent. Maintain best_so_far the best split | |
871 | * so far, by comparing this and best_so_far and copying this into | |
872 | * bst_so_far as needed. | |
873 | */ | |
5ff62c30 | 874 | static void copy_split_if_better(struct scoreboard *sb, |
54a4c617 JH |
875 | struct blame_entry *best_so_far, |
876 | struct blame_entry *this) | |
d24bba80 | 877 | { |
54a4c617 JH |
878 | int i; |
879 | ||
d24bba80 JH |
880 | if (!this[1].suspect) |
881 | return; | |
5ff62c30 JH |
882 | if (best_so_far[1].suspect) { |
883 | if (ent_score(sb, &this[1]) < ent_score(sb, &best_so_far[1])) | |
884 | return; | |
885 | } | |
54a4c617 JH |
886 | |
887 | for (i = 0; i < 3; i++) | |
888 | origin_incref(this[i].suspect); | |
889 | decref_split(best_so_far); | |
d24bba80 JH |
890 | memcpy(best_so_far, this, sizeof(struct blame_entry [3])); |
891 | } | |
892 | ||
1732a1fd JH |
893 | /* |
894 | * Find the lines from parent that are the same as ent so that | |
895 | * we can pass blames to it. file_p has the blob contents for | |
896 | * the parent. | |
897 | */ | |
d24bba80 JH |
898 | static void find_copy_in_blob(struct scoreboard *sb, |
899 | struct blame_entry *ent, | |
900 | struct origin *parent, | |
54a4c617 | 901 | struct blame_entry *split, |
d24bba80 JH |
902 | mmfile_t *file_p) |
903 | { | |
904 | const char *cp; | |
905 | int cnt; | |
906 | mmfile_t file_o; | |
907 | struct patch *patch; | |
908 | int i, plno, tlno; | |
909 | ||
1732a1fd JH |
910 | /* |
911 | * Prepare mmfile that contains only the lines in ent. | |
912 | */ | |
d24bba80 JH |
913 | cp = nth_line(sb, ent->lno); |
914 | file_o.ptr = (char*) cp; | |
915 | cnt = ent->num_lines; | |
916 | ||
917 | while (cnt && cp < sb->final_buf + sb->final_buf_size) { | |
918 | if (*cp++ == '\n') | |
919 | cnt--; | |
920 | } | |
921 | file_o.size = cp - file_o.ptr; | |
922 | ||
923 | patch = compare_buffer(file_p, &file_o, 1); | |
924 | ||
925 | memset(split, 0, sizeof(struct blame_entry [3])); | |
926 | plno = tlno = 0; | |
927 | for (i = 0; i < patch->num; i++) { | |
928 | struct chunk *chunk = &patch->chunks[i]; | |
929 | ||
930 | /* tlno to chunk->same are the same as ent */ | |
931 | if (ent->num_lines <= tlno) | |
932 | break; | |
933 | if (tlno < chunk->same) { | |
934 | struct blame_entry this[3]; | |
935 | split_overlap(this, ent, | |
936 | tlno + ent->s_lno, plno, | |
937 | chunk->same + ent->s_lno, | |
938 | parent); | |
5ff62c30 | 939 | copy_split_if_better(sb, split, this); |
54a4c617 | 940 | decref_split(this); |
d24bba80 JH |
941 | } |
942 | plno = chunk->p_next; | |
943 | tlno = chunk->t_next; | |
944 | } | |
945 | free_patch(patch); | |
946 | } | |
947 | ||
1732a1fd JH |
948 | /* |
949 | * See if lines currently target is suspected for can be attributed to | |
950 | * parent. | |
951 | */ | |
d24bba80 JH |
952 | static int find_move_in_parent(struct scoreboard *sb, |
953 | struct origin *target, | |
954 | struct origin *parent) | |
955 | { | |
650e2f67 | 956 | int last_in_target, made_progress; |
46014766 | 957 | struct blame_entry *e, split[3]; |
d24bba80 | 958 | mmfile_t file_p; |
d24bba80 JH |
959 | |
960 | last_in_target = find_last_in_target(sb, target); | |
961 | if (last_in_target < 0) | |
962 | return 1; /* nothing remains for this target */ | |
963 | ||
c2e525d9 JH |
964 | fill_origin_blob(parent, &file_p); |
965 | if (!file_p.ptr) | |
d24bba80 | 966 | return 0; |
d24bba80 | 967 | |
650e2f67 JH |
968 | made_progress = 1; |
969 | while (made_progress) { | |
970 | made_progress = 0; | |
971 | for (e = sb->ent; e; e = e->next) { | |
171dccd5 | 972 | if (e->guilty || !same_suspect(e->suspect, target)) |
650e2f67 JH |
973 | continue; |
974 | find_copy_in_blob(sb, e, parent, split, &file_p); | |
975 | if (split[1].suspect && | |
976 | blame_move_score < ent_score(sb, &split[1])) { | |
977 | split_blame(sb, split, e); | |
978 | made_progress = 1; | |
979 | } | |
980 | decref_split(split); | |
981 | } | |
d24bba80 | 982 | } |
d24bba80 JH |
983 | return 0; |
984 | } | |
985 | ||
33494784 JH |
986 | struct blame_list { |
987 | struct blame_entry *ent; | |
988 | struct blame_entry split[3]; | |
989 | }; | |
990 | ||
1732a1fd JH |
991 | /* |
992 | * Count the number of entries the target is suspected for, | |
993 | * and prepare a list of entry and the best split. | |
994 | */ | |
33494784 JH |
995 | static struct blame_list *setup_blame_list(struct scoreboard *sb, |
996 | struct origin *target, | |
997 | int *num_ents_p) | |
998 | { | |
999 | struct blame_entry *e; | |
1000 | int num_ents, i; | |
1001 | struct blame_list *blame_list = NULL; | |
1002 | ||
33494784 | 1003 | for (e = sb->ent, num_ents = 0; e; e = e->next) |
171dccd5 | 1004 | if (!e->guilty && same_suspect(e->suspect, target)) |
33494784 JH |
1005 | num_ents++; |
1006 | if (num_ents) { | |
1007 | blame_list = xcalloc(num_ents, sizeof(struct blame_list)); | |
1008 | for (e = sb->ent, i = 0; e; e = e->next) | |
171dccd5 | 1009 | if (!e->guilty && same_suspect(e->suspect, target)) |
33494784 JH |
1010 | blame_list[i++].ent = e; |
1011 | } | |
1012 | *num_ents_p = num_ents; | |
1013 | return blame_list; | |
1014 | } | |
1015 | ||
1732a1fd JH |
1016 | /* |
1017 | * For lines target is suspected for, see if we can find code movement | |
1018 | * across file boundary from the parent commit. porigin is the path | |
1019 | * in the parent we already tried. | |
1020 | */ | |
18abd745 JH |
1021 | static int find_copy_in_parent(struct scoreboard *sb, |
1022 | struct origin *target, | |
1023 | struct commit *parent, | |
1024 | struct origin *porigin, | |
1025 | int opt) | |
1026 | { | |
1027 | struct diff_options diff_opts; | |
1028 | const char *paths[1]; | |
aec8fa1f | 1029 | int i, j; |
33494784 JH |
1030 | int retval; |
1031 | struct blame_list *blame_list; | |
aec8fa1f | 1032 | int num_ents; |
18abd745 | 1033 | |
33494784 JH |
1034 | blame_list = setup_blame_list(sb, target, &num_ents); |
1035 | if (!blame_list) | |
18abd745 JH |
1036 | return 1; /* nothing remains for this target */ |
1037 | ||
1038 | diff_setup(&diff_opts); | |
1039 | diff_opts.recursive = 1; | |
1040 | diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
1041 | ||
18abd745 JH |
1042 | paths[0] = NULL; |
1043 | diff_tree_setup_paths(paths, &diff_opts); | |
1044 | if (diff_setup_done(&diff_opts) < 0) | |
1045 | die("diff-setup"); | |
33494784 JH |
1046 | |
1047 | /* Try "find copies harder" on new path if requested; | |
1048 | * we do not want to use diffcore_rename() actually to | |
1049 | * match things up; find_copies_harder is set only to | |
1050 | * force diff_tree_sha1() to feed all filepairs to diff_queue, | |
1051 | * and this code needs to be after diff_setup_done(), which | |
1052 | * usually makes find-copies-harder imply copy detection. | |
1053 | */ | |
1054 | if ((opt & PICKAXE_BLAME_COPY_HARDER) && | |
1055 | (!porigin || strcmp(target->path, porigin->path))) | |
1056 | diff_opts.find_copies_harder = 1; | |
1057 | ||
1cfe7733 JH |
1058 | if (is_null_sha1(target->commit->object.sha1)) |
1059 | do_diff_cache(parent->tree->object.sha1, &diff_opts); | |
1060 | else | |
1061 | diff_tree_sha1(parent->tree->object.sha1, | |
1062 | target->commit->tree->object.sha1, | |
1063 | "", &diff_opts); | |
18abd745 | 1064 | |
33494784 JH |
1065 | if (!diff_opts.find_copies_harder) |
1066 | diffcore_std(&diff_opts); | |
18abd745 | 1067 | |
33494784 JH |
1068 | retval = 0; |
1069 | while (1) { | |
1070 | int made_progress = 0; | |
1071 | ||
1072 | for (i = 0; i < diff_queued_diff.nr; i++) { | |
1073 | struct diff_filepair *p = diff_queued_diff.queue[i]; | |
1074 | struct origin *norigin; | |
1075 | mmfile_t file_p; | |
33494784 JH |
1076 | struct blame_entry this[3]; |
1077 | ||
1078 | if (!DIFF_FILE_VALID(p->one)) | |
1079 | continue; /* does not exist in parent */ | |
1080 | if (porigin && !strcmp(p->one->path, porigin->path)) | |
1081 | /* find_move already dealt with this path */ | |
1082 | continue; | |
1083 | ||
1084 | norigin = get_origin(sb, parent, p->one->path); | |
1085 | hashcpy(norigin->blob_sha1, p->one->sha1); | |
c2e525d9 | 1086 | fill_origin_blob(norigin, &file_p); |
33494784 JH |
1087 | if (!file_p.ptr) |
1088 | continue; | |
1089 | ||
1090 | for (j = 0; j < num_ents; j++) { | |
1091 | find_copy_in_blob(sb, blame_list[j].ent, | |
1092 | norigin, this, &file_p); | |
1093 | copy_split_if_better(sb, blame_list[j].split, | |
1094 | this); | |
1095 | decref_split(this); | |
1096 | } | |
33494784 JH |
1097 | origin_decref(norigin); |
1098 | } | |
18abd745 | 1099 | |
aec8fa1f | 1100 | for (j = 0; j < num_ents; j++) { |
33494784 JH |
1101 | struct blame_entry *split = blame_list[j].split; |
1102 | if (split[1].suspect && | |
1103 | blame_copy_score < ent_score(sb, &split[1])) { | |
1104 | split_blame(sb, split, blame_list[j].ent); | |
1105 | made_progress = 1; | |
1106 | } | |
1107 | decref_split(split); | |
18abd745 | 1108 | } |
33494784 | 1109 | free(blame_list); |
aec8fa1f | 1110 | |
33494784 JH |
1111 | if (!made_progress) |
1112 | break; | |
1113 | blame_list = setup_blame_list(sb, target, &num_ents); | |
1114 | if (!blame_list) { | |
1115 | retval = 1; | |
1116 | break; | |
1117 | } | |
18abd745 | 1118 | } |
33494784 | 1119 | diff_flush(&diff_opts); |
18abd745 | 1120 | |
33494784 | 1121 | return retval; |
18abd745 JH |
1122 | } |
1123 | ||
1732a1fd JH |
1124 | /* |
1125 | * The blobs of origin and porigin exactly match, so everything | |
c2e525d9 JH |
1126 | * origin is suspected for can be blamed on the parent. |
1127 | */ | |
1128 | static void pass_whole_blame(struct scoreboard *sb, | |
1129 | struct origin *origin, struct origin *porigin) | |
1130 | { | |
1131 | struct blame_entry *e; | |
1132 | ||
1133 | if (!porigin->file.ptr && origin->file.ptr) { | |
1134 | /* Steal its file */ | |
1135 | porigin->file = origin->file; | |
1136 | origin->file.ptr = NULL; | |
1137 | } | |
1138 | for (e = sb->ent; e; e = e->next) { | |
171dccd5 | 1139 | if (!same_suspect(e->suspect, origin)) |
c2e525d9 JH |
1140 | continue; |
1141 | origin_incref(porigin); | |
1142 | origin_decref(e->suspect); | |
1143 | e->suspect = porigin; | |
1144 | } | |
1145 | } | |
1146 | ||
cee7f245 JH |
1147 | #define MAXPARENT 16 |
1148 | ||
d24bba80 | 1149 | static void pass_blame(struct scoreboard *sb, struct origin *origin, int opt) |
cee7f245 | 1150 | { |
f69e743d | 1151 | int i, pass; |
cee7f245 JH |
1152 | struct commit *commit = origin->commit; |
1153 | struct commit_list *parent; | |
1154 | struct origin *parent_origin[MAXPARENT], *porigin; | |
1155 | ||
1156 | memset(parent_origin, 0, sizeof(parent_origin)); | |
cee7f245 | 1157 | |
f69e743d JH |
1158 | /* The first pass looks for unrenamed path to optimize for |
1159 | * common cases, then we look for renames in the second pass. | |
1160 | */ | |
1161 | for (pass = 0; pass < 2; pass++) { | |
1162 | struct origin *(*find)(struct scoreboard *, | |
1163 | struct commit *, struct origin *); | |
1164 | find = pass ? find_rename : find_origin; | |
1165 | ||
1166 | for (i = 0, parent = commit->parents; | |
1167 | i < MAXPARENT && parent; | |
1168 | parent = parent->next, i++) { | |
1169 | struct commit *p = parent->item; | |
0421d9f8 | 1170 | int j, same; |
f69e743d JH |
1171 | |
1172 | if (parent_origin[i]) | |
1173 | continue; | |
1174 | if (parse_commit(p)) | |
1175 | continue; | |
0d981c67 | 1176 | porigin = find(sb, p, origin); |
f69e743d JH |
1177 | if (!porigin) |
1178 | continue; | |
1179 | if (!hashcmp(porigin->blob_sha1, origin->blob_sha1)) { | |
c2e525d9 | 1180 | pass_whole_blame(sb, origin, porigin); |
f69e743d JH |
1181 | origin_decref(porigin); |
1182 | goto finish; | |
1183 | } | |
0421d9f8 | 1184 | for (j = same = 0; j < i; j++) |
33494784 JH |
1185 | if (parent_origin[j] && |
1186 | !hashcmp(parent_origin[j]->blob_sha1, | |
0421d9f8 JH |
1187 | porigin->blob_sha1)) { |
1188 | same = 1; | |
1189 | break; | |
1190 | } | |
1191 | if (!same) | |
1192 | parent_origin[i] = porigin; | |
1193 | else | |
1194 | origin_decref(porigin); | |
cee7f245 | 1195 | } |
cee7f245 JH |
1196 | } |
1197 | ||
c2e525d9 | 1198 | num_commits++; |
cee7f245 JH |
1199 | for (i = 0, parent = commit->parents; |
1200 | i < MAXPARENT && parent; | |
1201 | parent = parent->next, i++) { | |
1202 | struct origin *porigin = parent_origin[i]; | |
1203 | if (!porigin) | |
1204 | continue; | |
1205 | if (pass_blame_to_parent(sb, origin, porigin)) | |
54a4c617 | 1206 | goto finish; |
cee7f245 | 1207 | } |
d24bba80 JH |
1208 | |
1209 | /* | |
1732a1fd | 1210 | * Optionally find moves in parents' files. |
d24bba80 JH |
1211 | */ |
1212 | if (opt & PICKAXE_BLAME_MOVE) | |
1213 | for (i = 0, parent = commit->parents; | |
1214 | i < MAXPARENT && parent; | |
1215 | parent = parent->next, i++) { | |
1216 | struct origin *porigin = parent_origin[i]; | |
1217 | if (!porigin) | |
1218 | continue; | |
1219 | if (find_move_in_parent(sb, origin, porigin)) | |
54a4c617 | 1220 | goto finish; |
d24bba80 JH |
1221 | } |
1222 | ||
18abd745 | 1223 | /* |
1732a1fd | 1224 | * Optionally find copies from parents' files. |
18abd745 JH |
1225 | */ |
1226 | if (opt & PICKAXE_BLAME_COPY) | |
1227 | for (i = 0, parent = commit->parents; | |
1228 | i < MAXPARENT && parent; | |
1229 | parent = parent->next, i++) { | |
1230 | struct origin *porigin = parent_origin[i]; | |
1231 | if (find_copy_in_parent(sb, origin, parent->item, | |
1232 | porigin, opt)) | |
54a4c617 | 1233 | goto finish; |
18abd745 | 1234 | } |
54a4c617 JH |
1235 | |
1236 | finish: | |
1237 | for (i = 0; i < MAXPARENT; i++) | |
1238 | origin_decref(parent_origin[i]); | |
cee7f245 JH |
1239 | } |
1240 | ||
1732a1fd JH |
1241 | /* |
1242 | * Information on commits, used for output. | |
1243 | */ | |
cee7f245 JH |
1244 | struct commit_info |
1245 | { | |
3a55602e SP |
1246 | const char *author; |
1247 | const char *author_mail; | |
cee7f245 | 1248 | unsigned long author_time; |
3a55602e | 1249 | const char *author_tz; |
cee7f245 JH |
1250 | |
1251 | /* filled only when asked for details */ | |
3a55602e SP |
1252 | const char *committer; |
1253 | const char *committer_mail; | |
cee7f245 | 1254 | unsigned long committer_time; |
3a55602e | 1255 | const char *committer_tz; |
cee7f245 | 1256 | |
3a55602e | 1257 | const char *summary; |
cee7f245 JH |
1258 | }; |
1259 | ||
1732a1fd JH |
1260 | /* |
1261 | * Parse author/committer line in the commit object buffer | |
1262 | */ | |
cee7f245 | 1263 | static void get_ac_line(const char *inbuf, const char *what, |
3a55602e SP |
1264 | int bufsz, char *person, const char **mail, |
1265 | unsigned long *time, const char **tz) | |
cee7f245 JH |
1266 | { |
1267 | int len; | |
1268 | char *tmp, *endp; | |
1269 | ||
1270 | tmp = strstr(inbuf, what); | |
1271 | if (!tmp) | |
1272 | goto error_out; | |
1273 | tmp += strlen(what); | |
1274 | endp = strchr(tmp, '\n'); | |
1275 | if (!endp) | |
1276 | len = strlen(tmp); | |
1277 | else | |
1278 | len = endp - tmp; | |
1279 | if (bufsz <= len) { | |
1280 | error_out: | |
1281 | /* Ugh */ | |
3a55602e | 1282 | *mail = *tz = "(unknown)"; |
cee7f245 JH |
1283 | *time = 0; |
1284 | return; | |
1285 | } | |
1286 | memcpy(person, tmp, len); | |
1287 | ||
1288 | tmp = person; | |
1289 | tmp += len; | |
1290 | *tmp = 0; | |
1291 | while (*tmp != ' ') | |
1292 | tmp--; | |
1293 | *tz = tmp+1; | |
1294 | ||
1295 | *tmp = 0; | |
1296 | while (*tmp != ' ') | |
1297 | tmp--; | |
1298 | *time = strtoul(tmp, NULL, 10); | |
1299 | ||
1300 | *tmp = 0; | |
1301 | while (*tmp != ' ') | |
1302 | tmp--; | |
1303 | *mail = tmp + 1; | |
1304 | *tmp = 0; | |
1305 | } | |
1306 | ||
1307 | static void get_commit_info(struct commit *commit, | |
1308 | struct commit_info *ret, | |
1309 | int detailed) | |
1310 | { | |
1311 | int len; | |
1312 | char *tmp, *endp; | |
1313 | static char author_buf[1024]; | |
1314 | static char committer_buf[1024]; | |
1315 | static char summary_buf[1024]; | |
1316 | ||
1732a1fd JH |
1317 | /* |
1318 | * We've operated without save_commit_buffer, so | |
612702e8 JH |
1319 | * we now need to populate them for output. |
1320 | */ | |
1321 | if (!commit->buffer) { | |
21666f1a | 1322 | enum object_type type; |
612702e8 JH |
1323 | unsigned long size; |
1324 | commit->buffer = | |
21666f1a | 1325 | read_sha1_file(commit->object.sha1, &type, &size); |
612702e8 | 1326 | } |
cee7f245 JH |
1327 | ret->author = author_buf; |
1328 | get_ac_line(commit->buffer, "\nauthor ", | |
1329 | sizeof(author_buf), author_buf, &ret->author_mail, | |
1330 | &ret->author_time, &ret->author_tz); | |
1331 | ||
1332 | if (!detailed) | |
1333 | return; | |
1334 | ||
1335 | ret->committer = committer_buf; | |
1336 | get_ac_line(commit->buffer, "\ncommitter ", | |
1337 | sizeof(committer_buf), committer_buf, &ret->committer_mail, | |
1338 | &ret->committer_time, &ret->committer_tz); | |
1339 | ||
1340 | ret->summary = summary_buf; | |
1341 | tmp = strstr(commit->buffer, "\n\n"); | |
1342 | if (!tmp) { | |
1343 | error_out: | |
1344 | sprintf(summary_buf, "(%s)", sha1_to_hex(commit->object.sha1)); | |
1345 | return; | |
1346 | } | |
1347 | tmp += 2; | |
1348 | endp = strchr(tmp, '\n'); | |
1349 | if (!endp) | |
1cfe7733 | 1350 | endp = tmp + strlen(tmp); |
cee7f245 | 1351 | len = endp - tmp; |
1cfe7733 | 1352 | if (len >= sizeof(summary_buf) || len == 0) |
cee7f245 JH |
1353 | goto error_out; |
1354 | memcpy(summary_buf, tmp, len); | |
1355 | summary_buf[len] = 0; | |
1356 | } | |
1357 | ||
1732a1fd JH |
1358 | /* |
1359 | * To allow LF and other nonportable characters in pathnames, | |
1360 | * they are c-style quoted as needed. | |
1361 | */ | |
46e5e69d JH |
1362 | static void write_filename_info(const char *path) |
1363 | { | |
1364 | printf("filename "); | |
1365 | write_name_quoted(NULL, 0, path, 1, stdout); | |
1366 | putchar('\n'); | |
1367 | } | |
1368 | ||
1732a1fd JH |
1369 | /* |
1370 | * The blame_entry is found to be guilty for the range. Mark it | |
1371 | * as such, and show it in incremental output. | |
1372 | */ | |
717d1462 LT |
1373 | static void found_guilty_entry(struct blame_entry *ent) |
1374 | { | |
1375 | if (ent->guilty) | |
1376 | return; | |
1377 | ent->guilty = 1; | |
1378 | if (incremental) { | |
1379 | struct origin *suspect = ent->suspect; | |
1380 | ||
1381 | printf("%s %d %d %d\n", | |
1382 | sha1_to_hex(suspect->commit->object.sha1), | |
1383 | ent->s_lno + 1, ent->lno + 1, ent->num_lines); | |
1384 | if (!(suspect->commit->object.flags & METAINFO_SHOWN)) { | |
1385 | struct commit_info ci; | |
1386 | suspect->commit->object.flags |= METAINFO_SHOWN; | |
1387 | get_commit_info(suspect->commit, &ci, 1); | |
1388 | printf("author %s\n", ci.author); | |
1389 | printf("author-mail %s\n", ci.author_mail); | |
1390 | printf("author-time %lu\n", ci.author_time); | |
1391 | printf("author-tz %s\n", ci.author_tz); | |
1392 | printf("committer %s\n", ci.committer); | |
1393 | printf("committer-mail %s\n", ci.committer_mail); | |
1394 | printf("committer-time %lu\n", ci.committer_time); | |
1395 | printf("committer-tz %s\n", ci.committer_tz); | |
1396 | printf("summary %s\n", ci.summary); | |
1397 | if (suspect->commit->object.flags & UNINTERESTING) | |
1398 | printf("boundary\n"); | |
1399 | } | |
46e5e69d | 1400 | write_filename_info(suspect->path); |
717d1462 LT |
1401 | } |
1402 | } | |
1403 | ||
1732a1fd JH |
1404 | /* |
1405 | * The main loop -- while the scoreboard has lines whose true origin | |
3dff5379 | 1406 | * is still unknown, pick one blame_entry, and allow its current |
1732a1fd JH |
1407 | * suspect to pass blames to its parents. |
1408 | */ | |
717d1462 LT |
1409 | static void assign_blame(struct scoreboard *sb, struct rev_info *revs, int opt) |
1410 | { | |
1411 | while (1) { | |
1412 | struct blame_entry *ent; | |
1413 | struct commit *commit; | |
1414 | struct origin *suspect = NULL; | |
1415 | ||
1416 | /* find one suspect to break down */ | |
1417 | for (ent = sb->ent; !suspect && ent; ent = ent->next) | |
1418 | if (!ent->guilty) | |
1419 | suspect = ent->suspect; | |
1420 | if (!suspect) | |
1421 | return; /* all done */ | |
1422 | ||
1732a1fd JH |
1423 | /* |
1424 | * We will use this suspect later in the loop, | |
1425 | * so hold onto it in the meantime. | |
1426 | */ | |
717d1462 LT |
1427 | origin_incref(suspect); |
1428 | commit = suspect->commit; | |
1429 | if (!commit->object.parsed) | |
1430 | parse_commit(commit); | |
1431 | if (!(commit->object.flags & UNINTERESTING) && | |
1732a1fd | 1432 | !(revs->max_age != -1 && commit->date < revs->max_age)) |
717d1462 LT |
1433 | pass_blame(sb, suspect, opt); |
1434 | else { | |
1435 | commit->object.flags |= UNINTERESTING; | |
1436 | if (commit->object.parsed) | |
1437 | mark_parents_uninteresting(commit); | |
1438 | } | |
1439 | /* treat root commit as boundary */ | |
1440 | if (!commit->parents && !show_root) | |
1441 | commit->object.flags |= UNINTERESTING; | |
1442 | ||
1443 | /* Take responsibility for the remaining entries */ | |
1444 | for (ent = sb->ent; ent; ent = ent->next) | |
171dccd5 | 1445 | if (same_suspect(ent->suspect, suspect)) |
717d1462 LT |
1446 | found_guilty_entry(ent); |
1447 | origin_decref(suspect); | |
1448 | ||
1449 | if (DEBUG) /* sanity */ | |
1450 | sanity_check_refcnt(sb); | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | static const char *format_time(unsigned long time, const char *tz_str, | |
1455 | int show_raw_time) | |
1456 | { | |
1457 | static char time_buf[128]; | |
1458 | time_t t = time; | |
1459 | int minutes, tz; | |
1460 | struct tm *tm; | |
1461 | ||
1462 | if (show_raw_time) { | |
1463 | sprintf(time_buf, "%lu %s", time, tz_str); | |
1464 | return time_buf; | |
1465 | } | |
1466 | ||
1467 | tz = atoi(tz_str); | |
1468 | minutes = tz < 0 ? -tz : tz; | |
1469 | minutes = (minutes / 100)*60 + (minutes % 100); | |
1470 | minutes = tz < 0 ? -minutes : minutes; | |
1471 | t = time + minutes * 60; | |
1472 | tm = gmtime(&t); | |
1473 | ||
1474 | strftime(time_buf, sizeof(time_buf), "%Y-%m-%d %H:%M:%S ", tm); | |
1475 | strcat(time_buf, tz_str); | |
1476 | return time_buf; | |
1477 | } | |
1478 | ||
cee7f245 JH |
1479 | #define OUTPUT_ANNOTATE_COMPAT 001 |
1480 | #define OUTPUT_LONG_OBJECT_NAME 002 | |
1481 | #define OUTPUT_RAW_TIMESTAMP 004 | |
1482 | #define OUTPUT_PORCELAIN 010 | |
1483 | #define OUTPUT_SHOW_NAME 020 | |
1484 | #define OUTPUT_SHOW_NUMBER 040 | |
5ff62c30 | 1485 | #define OUTPUT_SHOW_SCORE 0100 |
cee7f245 JH |
1486 | |
1487 | static void emit_porcelain(struct scoreboard *sb, struct blame_entry *ent) | |
1488 | { | |
1489 | int cnt; | |
1490 | const char *cp; | |
1491 | struct origin *suspect = ent->suspect; | |
1492 | char hex[41]; | |
1493 | ||
1494 | strcpy(hex, sha1_to_hex(suspect->commit->object.sha1)); | |
1495 | printf("%s%c%d %d %d\n", | |
1496 | hex, | |
1497 | ent->guilty ? ' ' : '*', // purely for debugging | |
1498 | ent->s_lno + 1, | |
1499 | ent->lno + 1, | |
1500 | ent->num_lines); | |
1501 | if (!(suspect->commit->object.flags & METAINFO_SHOWN)) { | |
1502 | struct commit_info ci; | |
1503 | suspect->commit->object.flags |= METAINFO_SHOWN; | |
1504 | get_commit_info(suspect->commit, &ci, 1); | |
1505 | printf("author %s\n", ci.author); | |
1506 | printf("author-mail %s\n", ci.author_mail); | |
1507 | printf("author-time %lu\n", ci.author_time); | |
1508 | printf("author-tz %s\n", ci.author_tz); | |
1509 | printf("committer %s\n", ci.committer); | |
1510 | printf("committer-mail %s\n", ci.committer_mail); | |
1511 | printf("committer-time %lu\n", ci.committer_time); | |
1512 | printf("committer-tz %s\n", ci.committer_tz); | |
46e5e69d | 1513 | write_filename_info(suspect->path); |
cee7f245 | 1514 | printf("summary %s\n", ci.summary); |
b11121d9 JH |
1515 | if (suspect->commit->object.flags & UNINTERESTING) |
1516 | printf("boundary\n"); | |
cee7f245 JH |
1517 | } |
1518 | else if (suspect->commit->object.flags & MORE_THAN_ONE_PATH) | |
46e5e69d | 1519 | write_filename_info(suspect->path); |
cee7f245 JH |
1520 | |
1521 | cp = nth_line(sb, ent->lno); | |
1522 | for (cnt = 0; cnt < ent->num_lines; cnt++) { | |
1523 | char ch; | |
1524 | if (cnt) | |
1525 | printf("%s %d %d\n", hex, | |
1526 | ent->s_lno + 1 + cnt, | |
1527 | ent->lno + 1 + cnt); | |
1528 | putchar('\t'); | |
1529 | do { | |
1530 | ch = *cp++; | |
1531 | putchar(ch); | |
1532 | } while (ch != '\n' && | |
1533 | cp < sb->final_buf + sb->final_buf_size); | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | static void emit_other(struct scoreboard *sb, struct blame_entry *ent, int opt) | |
1538 | { | |
1539 | int cnt; | |
1540 | const char *cp; | |
1541 | struct origin *suspect = ent->suspect; | |
1542 | struct commit_info ci; | |
1543 | char hex[41]; | |
1544 | int show_raw_time = !!(opt & OUTPUT_RAW_TIMESTAMP); | |
1545 | ||
1546 | get_commit_info(suspect->commit, &ci, 1); | |
1547 | strcpy(hex, sha1_to_hex(suspect->commit->object.sha1)); | |
1548 | ||
1549 | cp = nth_line(sb, ent->lno); | |
1550 | for (cnt = 0; cnt < ent->num_lines; cnt++) { | |
1551 | char ch; | |
b11121d9 JH |
1552 | int length = (opt & OUTPUT_LONG_OBJECT_NAME) ? 40 : 8; |
1553 | ||
1554 | if (suspect->commit->object.flags & UNINTERESTING) { | |
e68989a7 JH |
1555 | if (blank_boundary) |
1556 | memset(hex, ' ', length); | |
1557 | else if (!cmd_is_annotate) { | |
4c10a5ca JH |
1558 | length--; |
1559 | putchar('^'); | |
1560 | } | |
b11121d9 | 1561 | } |
cee7f245 | 1562 | |
b11121d9 | 1563 | printf("%.*s", length, hex); |
cee7f245 JH |
1564 | if (opt & OUTPUT_ANNOTATE_COMPAT) |
1565 | printf("\t(%10s\t%10s\t%d)", ci.author, | |
1566 | format_time(ci.author_time, ci.author_tz, | |
1567 | show_raw_time), | |
1568 | ent->lno + 1 + cnt); | |
1569 | else { | |
5ff62c30 | 1570 | if (opt & OUTPUT_SHOW_SCORE) |
54a4c617 JH |
1571 | printf(" %*d %02d", |
1572 | max_score_digits, ent->score, | |
1573 | ent->suspect->refcnt); | |
cee7f245 JH |
1574 | if (opt & OUTPUT_SHOW_NAME) |
1575 | printf(" %-*.*s", longest_file, longest_file, | |
1576 | suspect->path); | |
1577 | if (opt & OUTPUT_SHOW_NUMBER) | |
1578 | printf(" %*d", max_orig_digits, | |
1579 | ent->s_lno + 1 + cnt); | |
1580 | printf(" (%-*.*s %10s %*d) ", | |
1581 | longest_author, longest_author, ci.author, | |
1582 | format_time(ci.author_time, ci.author_tz, | |
1583 | show_raw_time), | |
1584 | max_digits, ent->lno + 1 + cnt); | |
1585 | } | |
1586 | do { | |
1587 | ch = *cp++; | |
1588 | putchar(ch); | |
1589 | } while (ch != '\n' && | |
1590 | cp < sb->final_buf + sb->final_buf_size); | |
1591 | } | |
1592 | } | |
1593 | ||
1594 | static void output(struct scoreboard *sb, int option) | |
1595 | { | |
1596 | struct blame_entry *ent; | |
1597 | ||
1598 | if (option & OUTPUT_PORCELAIN) { | |
1599 | for (ent = sb->ent; ent; ent = ent->next) { | |
1600 | struct blame_entry *oth; | |
1601 | struct origin *suspect = ent->suspect; | |
1602 | struct commit *commit = suspect->commit; | |
1603 | if (commit->object.flags & MORE_THAN_ONE_PATH) | |
1604 | continue; | |
1605 | for (oth = ent->next; oth; oth = oth->next) { | |
1606 | if ((oth->suspect->commit != commit) || | |
1607 | !strcmp(oth->suspect->path, suspect->path)) | |
1608 | continue; | |
1609 | commit->object.flags |= MORE_THAN_ONE_PATH; | |
1610 | break; | |
1611 | } | |
1612 | } | |
1613 | } | |
1614 | ||
1615 | for (ent = sb->ent; ent; ent = ent->next) { | |
1616 | if (option & OUTPUT_PORCELAIN) | |
1617 | emit_porcelain(sb, ent); | |
5ff62c30 | 1618 | else { |
cee7f245 | 1619 | emit_other(sb, ent, option); |
5ff62c30 | 1620 | } |
cee7f245 JH |
1621 | } |
1622 | } | |
1623 | ||
1732a1fd JH |
1624 | /* |
1625 | * To allow quick access to the contents of nth line in the | |
1626 | * final image, prepare an index in the scoreboard. | |
1627 | */ | |
cee7f245 JH |
1628 | static int prepare_lines(struct scoreboard *sb) |
1629 | { | |
1630 | const char *buf = sb->final_buf; | |
1631 | unsigned long len = sb->final_buf_size; | |
1632 | int num = 0, incomplete = 0, bol = 1; | |
1633 | ||
1634 | if (len && buf[len-1] != '\n') | |
1635 | incomplete++; /* incomplete line at the end */ | |
1636 | while (len--) { | |
1637 | if (bol) { | |
1638 | sb->lineno = xrealloc(sb->lineno, | |
1639 | sizeof(int* ) * (num + 1)); | |
1640 | sb->lineno[num] = buf - sb->final_buf; | |
1641 | bol = 0; | |
1642 | } | |
1643 | if (*buf++ == '\n') { | |
1644 | num++; | |
1645 | bol = 1; | |
1646 | } | |
1647 | } | |
1ca6ca87 JH |
1648 | sb->lineno = xrealloc(sb->lineno, |
1649 | sizeof(int* ) * (num + incomplete + 1)); | |
1650 | sb->lineno[num + incomplete] = buf - sb->final_buf; | |
cee7f245 JH |
1651 | sb->num_lines = num + incomplete; |
1652 | return sb->num_lines; | |
1653 | } | |
1654 | ||
1732a1fd JH |
1655 | /* |
1656 | * Add phony grafts for use with -S; this is primarily to | |
1657 | * support git-cvsserver that wants to give a linear history | |
1658 | * to its clients. | |
1659 | */ | |
cee7f245 JH |
1660 | static int read_ancestry(const char *graft_file) |
1661 | { | |
1662 | FILE *fp = fopen(graft_file, "r"); | |
1663 | char buf[1024]; | |
1664 | if (!fp) | |
1665 | return -1; | |
1666 | while (fgets(buf, sizeof(buf), fp)) { | |
1667 | /* The format is just "Commit Parent1 Parent2 ...\n" */ | |
1668 | int len = strlen(buf); | |
1669 | struct commit_graft *graft = read_graft_line(buf, len); | |
8eaf7986 JH |
1670 | if (graft) |
1671 | register_commit_graft(graft, 0); | |
cee7f245 JH |
1672 | } |
1673 | fclose(fp); | |
1674 | return 0; | |
1675 | } | |
1676 | ||
1732a1fd JH |
1677 | /* |
1678 | * How many columns do we need to show line numbers in decimal? | |
1679 | */ | |
cee7f245 JH |
1680 | static int lineno_width(int lines) |
1681 | { | |
1682 | int i, width; | |
1683 | ||
1684 | for (width = 1, i = 10; i <= lines + 1; width++) | |
1685 | i *= 10; | |
1686 | return width; | |
1687 | } | |
1688 | ||
1732a1fd JH |
1689 | /* |
1690 | * How many columns do we need to show line numbers, authors, | |
1691 | * and filenames? | |
1692 | */ | |
cee7f245 JH |
1693 | static void find_alignment(struct scoreboard *sb, int *option) |
1694 | { | |
1695 | int longest_src_lines = 0; | |
1696 | int longest_dst_lines = 0; | |
5ff62c30 | 1697 | unsigned largest_score = 0; |
cee7f245 JH |
1698 | struct blame_entry *e; |
1699 | ||
1700 | for (e = sb->ent; e; e = e->next) { | |
1701 | struct origin *suspect = e->suspect; | |
1702 | struct commit_info ci; | |
1703 | int num; | |
1704 | ||
ab3bb800 JH |
1705 | if (strcmp(suspect->path, sb->path)) |
1706 | *option |= OUTPUT_SHOW_NAME; | |
1707 | num = strlen(suspect->path); | |
1708 | if (longest_file < num) | |
1709 | longest_file = num; | |
cee7f245 JH |
1710 | if (!(suspect->commit->object.flags & METAINFO_SHOWN)) { |
1711 | suspect->commit->object.flags |= METAINFO_SHOWN; | |
1712 | get_commit_info(suspect->commit, &ci, 1); | |
cee7f245 JH |
1713 | num = strlen(ci.author); |
1714 | if (longest_author < num) | |
1715 | longest_author = num; | |
1716 | } | |
1717 | num = e->s_lno + e->num_lines; | |
1718 | if (longest_src_lines < num) | |
1719 | longest_src_lines = num; | |
1720 | num = e->lno + e->num_lines; | |
1721 | if (longest_dst_lines < num) | |
1722 | longest_dst_lines = num; | |
5ff62c30 JH |
1723 | if (largest_score < ent_score(sb, e)) |
1724 | largest_score = ent_score(sb, e); | |
cee7f245 JH |
1725 | } |
1726 | max_orig_digits = lineno_width(longest_src_lines); | |
1727 | max_digits = lineno_width(longest_dst_lines); | |
5ff62c30 | 1728 | max_score_digits = lineno_width(largest_score); |
cee7f245 JH |
1729 | } |
1730 | ||
1732a1fd JH |
1731 | /* |
1732 | * For debugging -- origin is refcounted, and this asserts that | |
1733 | * we do not underflow. | |
1734 | */ | |
54a4c617 JH |
1735 | static void sanity_check_refcnt(struct scoreboard *sb) |
1736 | { | |
1737 | int baa = 0; | |
1738 | struct blame_entry *ent; | |
1739 | ||
1740 | for (ent = sb->ent; ent; ent = ent->next) { | |
ae86ad65 | 1741 | /* Nobody should have zero or negative refcnt */ |
854b97f6 JH |
1742 | if (ent->suspect->refcnt <= 0) { |
1743 | fprintf(stderr, "%s in %s has negative refcnt %d\n", | |
1744 | ent->suspect->path, | |
1745 | sha1_to_hex(ent->suspect->commit->object.sha1), | |
1746 | ent->suspect->refcnt); | |
ae86ad65 | 1747 | baa = 1; |
854b97f6 | 1748 | } |
ae86ad65 JH |
1749 | } |
1750 | for (ent = sb->ent; ent; ent = ent->next) { | |
1751 | /* Mark the ones that haven't been checked */ | |
54a4c617 JH |
1752 | if (0 < ent->suspect->refcnt) |
1753 | ent->suspect->refcnt = -ent->suspect->refcnt; | |
54a4c617 JH |
1754 | } |
1755 | for (ent = sb->ent; ent; ent = ent->next) { | |
1732a1fd JH |
1756 | /* |
1757 | * ... then pick each and see if they have the the | |
1758 | * correct refcnt. | |
54a4c617 JH |
1759 | */ |
1760 | int found; | |
1761 | struct blame_entry *e; | |
1762 | struct origin *suspect = ent->suspect; | |
1763 | ||
1764 | if (0 < suspect->refcnt) | |
1765 | continue; | |
ae86ad65 | 1766 | suspect->refcnt = -suspect->refcnt; /* Unmark */ |
54a4c617 JH |
1767 | for (found = 0, e = sb->ent; e; e = e->next) { |
1768 | if (e->suspect != suspect) | |
1769 | continue; | |
1770 | found++; | |
1771 | } | |
854b97f6 JH |
1772 | if (suspect->refcnt != found) { |
1773 | fprintf(stderr, "%s in %s has refcnt %d, not %d\n", | |
1774 | ent->suspect->path, | |
1775 | sha1_to_hex(ent->suspect->commit->object.sha1), | |
1776 | ent->suspect->refcnt, found); | |
1777 | baa = 2; | |
1778 | } | |
54a4c617 JH |
1779 | } |
1780 | if (baa) { | |
1781 | int opt = 0160; | |
1782 | find_alignment(sb, &opt); | |
1783 | output(sb, opt); | |
854b97f6 | 1784 | die("Baa %d!", baa); |
54a4c617 JH |
1785 | } |
1786 | } | |
1787 | ||
1732a1fd JH |
1788 | /* |
1789 | * Used for the command line parsing; check if the path exists | |
1790 | * in the working tree. | |
1791 | */ | |
cee7f245 JH |
1792 | static int has_path_in_work_tree(const char *path) |
1793 | { | |
1794 | struct stat st; | |
1795 | return !lstat(path, &st); | |
1796 | } | |
1797 | ||
4a0fc95f JH |
1798 | static unsigned parse_score(const char *arg) |
1799 | { | |
1800 | char *end; | |
1801 | unsigned long score = strtoul(arg, &end, 10); | |
1802 | if (*end) | |
1803 | return 0; | |
1804 | return score; | |
1805 | } | |
1806 | ||
20239bae JK |
1807 | static const char *add_prefix(const char *prefix, const char *path) |
1808 | { | |
1809 | if (!prefix || !prefix[0]) | |
1810 | return path; | |
1811 | return prefix_path(prefix, strlen(prefix), path); | |
1812 | } | |
1813 | ||
1732a1fd JH |
1814 | /* |
1815 | * Parsing of (comma separated) one item in the -L option | |
1816 | */ | |
931233bc JH |
1817 | static const char *parse_loc(const char *spec, |
1818 | struct scoreboard *sb, long lno, | |
1819 | long begin, long *ret) | |
1820 | { | |
1821 | char *term; | |
1822 | const char *line; | |
1823 | long num; | |
1824 | int reg_error; | |
1825 | regex_t regexp; | |
1826 | regmatch_t match[1]; | |
1827 | ||
7bd9641d JH |
1828 | /* Allow "-L <something>,+20" to mean starting at <something> |
1829 | * for 20 lines, or "-L <something>,-5" for 5 lines ending at | |
1830 | * <something>. | |
1831 | */ | |
1832 | if (1 < begin && (spec[0] == '+' || spec[0] == '-')) { | |
1833 | num = strtol(spec + 1, &term, 10); | |
1834 | if (term != spec + 1) { | |
1835 | if (spec[0] == '-') | |
1836 | num = 0 - num; | |
1837 | if (0 < num) | |
1838 | *ret = begin + num - 2; | |
1839 | else if (!num) | |
1840 | *ret = begin; | |
1841 | else | |
1842 | *ret = begin + num; | |
1843 | return term; | |
1844 | } | |
1845 | return spec; | |
1846 | } | |
931233bc JH |
1847 | num = strtol(spec, &term, 10); |
1848 | if (term != spec) { | |
1849 | *ret = num; | |
1850 | return term; | |
1851 | } | |
1852 | if (spec[0] != '/') | |
1853 | return spec; | |
1854 | ||
1855 | /* it could be a regexp of form /.../ */ | |
1856 | for (term = (char*) spec + 1; *term && *term != '/'; term++) { | |
1857 | if (*term == '\\') | |
1858 | term++; | |
1859 | } | |
1860 | if (*term != '/') | |
1861 | return spec; | |
1862 | ||
1863 | /* try [spec+1 .. term-1] as regexp */ | |
1864 | *term = 0; | |
1865 | begin--; /* input is in human terms */ | |
1866 | line = nth_line(sb, begin); | |
1867 | ||
1868 | if (!(reg_error = regcomp(®exp, spec + 1, REG_NEWLINE)) && | |
1869 | !(reg_error = regexec(®exp, line, 1, match, 0))) { | |
1870 | const char *cp = line + match[0].rm_so; | |
1871 | const char *nline; | |
1872 | ||
1873 | while (begin++ < lno) { | |
1874 | nline = nth_line(sb, begin); | |
1875 | if (line <= cp && cp < nline) | |
1876 | break; | |
1877 | line = nline; | |
1878 | } | |
1879 | *ret = begin; | |
1880 | regfree(®exp); | |
1881 | *term++ = '/'; | |
1882 | return term; | |
1883 | } | |
1884 | else { | |
1885 | char errbuf[1024]; | |
1886 | regerror(reg_error, ®exp, errbuf, 1024); | |
1887 | die("-L parameter '%s': %s", spec + 1, errbuf); | |
1888 | } | |
1889 | } | |
1890 | ||
1732a1fd JH |
1891 | /* |
1892 | * Parsing of -L option | |
1893 | */ | |
931233bc JH |
1894 | static void prepare_blame_range(struct scoreboard *sb, |
1895 | const char *bottomtop, | |
1896 | long lno, | |
1897 | long *bottom, long *top) | |
1898 | { | |
1899 | const char *term; | |
1900 | ||
1901 | term = parse_loc(bottomtop, sb, lno, 1, bottom); | |
1902 | if (*term == ',') { | |
1903 | term = parse_loc(term + 1, sb, lno, *bottom + 1, top); | |
1904 | if (*term) | |
acca687f | 1905 | usage(blame_usage); |
931233bc JH |
1906 | } |
1907 | if (*term) | |
acca687f | 1908 | usage(blame_usage); |
931233bc JH |
1909 | } |
1910 | ||
4c10a5ca JH |
1911 | static int git_blame_config(const char *var, const char *value) |
1912 | { | |
1913 | if (!strcmp(var, "blame.showroot")) { | |
1914 | show_root = git_config_bool(var, value); | |
1915 | return 0; | |
1916 | } | |
1917 | if (!strcmp(var, "blame.blankboundary")) { | |
1918 | blank_boundary = git_config_bool(var, value); | |
1919 | return 0; | |
1920 | } | |
1921 | return git_default_config(var, value); | |
1922 | } | |
1923 | ||
1cfe7733 JH |
1924 | static struct commit *fake_working_tree_commit(const char *path, const char *contents_from) |
1925 | { | |
1926 | struct commit *commit; | |
1927 | struct origin *origin; | |
1928 | unsigned char head_sha1[20]; | |
1929 | char *buf; | |
1930 | const char *ident; | |
1931 | int fd; | |
1932 | time_t now; | |
1933 | unsigned long fin_size; | |
1934 | int size, len; | |
1935 | struct cache_entry *ce; | |
1936 | unsigned mode; | |
1937 | ||
1938 | if (get_sha1("HEAD", head_sha1)) | |
1939 | die("No such ref: HEAD"); | |
1940 | ||
1941 | time(&now); | |
1942 | commit = xcalloc(1, sizeof(*commit)); | |
1943 | commit->parents = xcalloc(1, sizeof(*commit->parents)); | |
1944 | commit->parents->item = lookup_commit_reference(head_sha1); | |
1945 | commit->object.parsed = 1; | |
1946 | commit->date = now; | |
1947 | commit->object.type = OBJ_COMMIT; | |
1948 | ||
1949 | origin = make_origin(commit, path); | |
1950 | ||
1951 | if (!contents_from || strcmp("-", contents_from)) { | |
1952 | struct stat st; | |
1953 | const char *read_from; | |
1954 | ||
1955 | if (contents_from) { | |
1956 | if (stat(contents_from, &st) < 0) | |
1957 | die("Cannot stat %s", contents_from); | |
1958 | read_from = contents_from; | |
1959 | } | |
1960 | else { | |
1961 | if (lstat(path, &st) < 0) | |
1962 | die("Cannot lstat %s", path); | |
1963 | read_from = path; | |
1964 | } | |
dc49cd76 | 1965 | fin_size = xsize_t(st.st_size); |
1cfe7733 JH |
1966 | buf = xmalloc(fin_size+1); |
1967 | mode = canon_mode(st.st_mode); | |
1968 | switch (st.st_mode & S_IFMT) { | |
1969 | case S_IFREG: | |
1970 | fd = open(read_from, O_RDONLY); | |
1971 | if (fd < 0) | |
1972 | die("cannot open %s", read_from); | |
1973 | if (read_in_full(fd, buf, fin_size) != fin_size) | |
1974 | die("cannot read %s", read_from); | |
1975 | break; | |
1976 | case S_IFLNK: | |
1977 | if (readlink(read_from, buf, fin_size+1) != fin_size) | |
1978 | die("cannot readlink %s", read_from); | |
1979 | break; | |
1980 | default: | |
1981 | die("unsupported file type %s", read_from); | |
1982 | } | |
1983 | } | |
1984 | else { | |
1985 | /* Reading from stdin */ | |
1986 | contents_from = "standard input"; | |
1987 | buf = NULL; | |
1988 | fin_size = 0; | |
1989 | mode = 0; | |
1990 | while (1) { | |
1991 | ssize_t cnt = 8192; | |
1992 | buf = xrealloc(buf, fin_size + cnt); | |
1993 | cnt = xread(0, buf + fin_size, cnt); | |
1994 | if (cnt < 0) | |
1995 | die("read error %s from stdin", | |
1996 | strerror(errno)); | |
1997 | if (!cnt) | |
1998 | break; | |
1999 | fin_size += cnt; | |
2000 | } | |
2001 | buf = xrealloc(buf, fin_size + 1); | |
2002 | } | |
2003 | buf[fin_size] = 0; | |
2004 | origin->file.ptr = buf; | |
2005 | origin->file.size = fin_size; | |
21666f1a | 2006 | pretend_sha1_file(buf, fin_size, OBJ_BLOB, origin->blob_sha1); |
1cfe7733 JH |
2007 | commit->util = origin; |
2008 | ||
2009 | /* | |
2010 | * Read the current index, replace the path entry with | |
2011 | * origin->blob_sha1 without mucking with its mode or type | |
2012 | * bits; we are not going to write this index out -- we just | |
2013 | * want to run "diff-index --cached". | |
2014 | */ | |
2015 | discard_cache(); | |
2016 | read_cache(); | |
2017 | ||
2018 | len = strlen(path); | |
2019 | if (!mode) { | |
2020 | int pos = cache_name_pos(path, len); | |
2021 | if (0 <= pos) | |
2022 | mode = ntohl(active_cache[pos]->ce_mode); | |
2023 | else | |
2024 | /* Let's not bother reading from HEAD tree */ | |
2025 | mode = S_IFREG | 0644; | |
2026 | } | |
2027 | size = cache_entry_size(len); | |
2028 | ce = xcalloc(1, size); | |
2029 | hashcpy(ce->sha1, origin->blob_sha1); | |
2030 | memcpy(ce->name, path, len); | |
2031 | ce->ce_flags = create_ce_flags(len, 0); | |
2032 | ce->ce_mode = create_ce_mode(mode); | |
2033 | add_cache_entry(ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE); | |
2034 | ||
2035 | /* | |
2036 | * We are not going to write this out, so this does not matter | |
2037 | * right now, but someday we might optimize diff-index --cached | |
2038 | * with cache-tree information. | |
2039 | */ | |
2040 | cache_tree_invalidate_path(active_cache_tree, path); | |
2041 | ||
2042 | commit->buffer = xmalloc(400); | |
2043 | ident = fmt_ident("Not Committed Yet", "not.committed.yet", NULL, 0); | |
1bb88be9 | 2044 | snprintf(commit->buffer, 400, |
1cfe7733 JH |
2045 | "tree 0000000000000000000000000000000000000000\n" |
2046 | "parent %s\n" | |
2047 | "author %s\n" | |
2048 | "committer %s\n\n" | |
2049 | "Version of %s from %s\n", | |
2050 | sha1_to_hex(head_sha1), | |
2051 | ident, ident, path, contents_from ? contents_from : path); | |
2052 | return commit; | |
2053 | } | |
2054 | ||
acca687f | 2055 | int cmd_blame(int argc, const char **argv, const char *prefix) |
cee7f245 JH |
2056 | { |
2057 | struct rev_info revs; | |
2058 | const char *path; | |
2059 | struct scoreboard sb; | |
2060 | struct origin *o; | |
2061 | struct blame_entry *ent; | |
d24bba80 | 2062 | int i, seen_dashdash, unk, opt; |
cee7f245 JH |
2063 | long bottom, top, lno; |
2064 | int output_option = 0; | |
870b39c1 | 2065 | int show_stats = 0; |
cee7f245 JH |
2066 | const char *revs_file = NULL; |
2067 | const char *final_commit_name = NULL; | |
21666f1a | 2068 | enum object_type type; |
931233bc | 2069 | const char *bottomtop = NULL; |
1cfe7733 | 2070 | const char *contents_from = NULL; |
cee7f245 | 2071 | |
e68989a7 JH |
2072 | cmd_is_annotate = !strcmp(argv[0], "annotate"); |
2073 | ||
4c10a5ca | 2074 | git_config(git_blame_config); |
612702e8 JH |
2075 | save_commit_buffer = 0; |
2076 | ||
d24bba80 | 2077 | opt = 0; |
cee7f245 JH |
2078 | seen_dashdash = 0; |
2079 | for (unk = i = 1; i < argc; i++) { | |
2080 | const char *arg = argv[i]; | |
2081 | if (*arg != '-') | |
2082 | break; | |
4c10a5ca JH |
2083 | else if (!strcmp("-b", arg)) |
2084 | blank_boundary = 1; | |
2085 | else if (!strcmp("--root", arg)) | |
2086 | show_root = 1; | |
870b39c1 JH |
2087 | else if (!strcmp(arg, "--show-stats")) |
2088 | show_stats = 1; | |
cee7f245 JH |
2089 | else if (!strcmp("-c", arg)) |
2090 | output_option |= OUTPUT_ANNOTATE_COMPAT; | |
2091 | else if (!strcmp("-t", arg)) | |
2092 | output_option |= OUTPUT_RAW_TIMESTAMP; | |
2093 | else if (!strcmp("-l", arg)) | |
2094 | output_option |= OUTPUT_LONG_OBJECT_NAME; | |
2095 | else if (!strcmp("-S", arg) && ++i < argc) | |
2096 | revs_file = argv[i]; | |
599065a3 | 2097 | else if (!prefixcmp(arg, "-M")) { |
d24bba80 | 2098 | opt |= PICKAXE_BLAME_MOVE; |
4a0fc95f JH |
2099 | blame_move_score = parse_score(arg+2); |
2100 | } | |
599065a3 | 2101 | else if (!prefixcmp(arg, "-C")) { |
18abd745 JH |
2102 | if (opt & PICKAXE_BLAME_COPY) |
2103 | opt |= PICKAXE_BLAME_COPY_HARDER; | |
2104 | opt |= PICKAXE_BLAME_COPY | PICKAXE_BLAME_MOVE; | |
4a0fc95f | 2105 | blame_copy_score = parse_score(arg+2); |
18abd745 | 2106 | } |
599065a3 | 2107 | else if (!prefixcmp(arg, "-L")) { |
2c40f984 JH |
2108 | if (!arg[2]) { |
2109 | if (++i >= argc) | |
acca687f | 2110 | usage(blame_usage); |
2c40f984 JH |
2111 | arg = argv[i]; |
2112 | } | |
2113 | else | |
2114 | arg += 2; | |
931233bc | 2115 | if (bottomtop) |
cee7f245 | 2116 | die("More than one '-L n,m' option given"); |
931233bc | 2117 | bottomtop = arg; |
cee7f245 | 2118 | } |
1cfe7733 JH |
2119 | else if (!strcmp("--contents", arg)) { |
2120 | if (++i >= argc) | |
2121 | usage(blame_usage); | |
2122 | contents_from = argv[i]; | |
2123 | } | |
717d1462 LT |
2124 | else if (!strcmp("--incremental", arg)) |
2125 | incremental = 1; | |
5ff62c30 JH |
2126 | else if (!strcmp("--score-debug", arg)) |
2127 | output_option |= OUTPUT_SHOW_SCORE; | |
cee7f245 JH |
2128 | else if (!strcmp("-f", arg) || |
2129 | !strcmp("--show-name", arg)) | |
2130 | output_option |= OUTPUT_SHOW_NAME; | |
2131 | else if (!strcmp("-n", arg) || | |
2132 | !strcmp("--show-number", arg)) | |
2133 | output_option |= OUTPUT_SHOW_NUMBER; | |
2134 | else if (!strcmp("-p", arg) || | |
2135 | !strcmp("--porcelain", arg)) | |
2136 | output_option |= OUTPUT_PORCELAIN; | |
2137 | else if (!strcmp("--", arg)) { | |
2138 | seen_dashdash = 1; | |
2139 | i++; | |
2140 | break; | |
2141 | } | |
2142 | else | |
2143 | argv[unk++] = arg; | |
2144 | } | |
2145 | ||
4f0219a4 RS |
2146 | if (!incremental) |
2147 | setup_pager(); | |
2148 | ||
4a0fc95f JH |
2149 | if (!blame_move_score) |
2150 | blame_move_score = BLAME_DEFAULT_MOVE_SCORE; | |
2151 | if (!blame_copy_score) | |
2152 | blame_copy_score = BLAME_DEFAULT_COPY_SCORE; | |
2153 | ||
1732a1fd JH |
2154 | /* |
2155 | * We have collected options unknown to us in argv[1..unk] | |
cee7f245 | 2156 | * which are to be passed to revision machinery if we are |
3dff5379 | 2157 | * going to do the "bottom" processing. |
cee7f245 JH |
2158 | * |
2159 | * The remaining are: | |
2160 | * | |
2161 | * (1) if seen_dashdash, its either | |
2162 | * "-options -- <path>" or | |
2163 | * "-options -- <path> <rev>". | |
2164 | * but the latter is allowed only if there is no | |
2165 | * options that we passed to revision machinery. | |
2166 | * | |
2167 | * (2) otherwise, we may have "--" somewhere later and | |
2168 | * might be looking at the first one of multiple 'rev' | |
2169 | * parameters (e.g. " master ^next ^maint -- path"). | |
2170 | * See if there is a dashdash first, and give the | |
2171 | * arguments before that to revision machinery. | |
2172 | * After that there must be one 'path'. | |
2173 | * | |
2174 | * (3) otherwise, its one of the three: | |
2175 | * "-options <path> <rev>" | |
2176 | * "-options <rev> <path>" | |
2177 | * "-options <path>" | |
2178 | * but again the first one is allowed only if | |
2179 | * there is no options that we passed to revision | |
2180 | * machinery. | |
2181 | */ | |
2182 | ||
2183 | if (seen_dashdash) { | |
2184 | /* (1) */ | |
2185 | if (argc <= i) | |
acca687f | 2186 | usage(blame_usage); |
20239bae | 2187 | path = add_prefix(prefix, argv[i]); |
cee7f245 JH |
2188 | if (i + 1 == argc - 1) { |
2189 | if (unk != 1) | |
acca687f | 2190 | usage(blame_usage); |
cee7f245 JH |
2191 | argv[unk++] = argv[i + 1]; |
2192 | } | |
2193 | else if (i + 1 != argc) | |
2194 | /* garbage at end */ | |
acca687f | 2195 | usage(blame_usage); |
cee7f245 JH |
2196 | } |
2197 | else { | |
2198 | int j; | |
2199 | for (j = i; !seen_dashdash && j < argc; j++) | |
2200 | if (!strcmp(argv[j], "--")) | |
2201 | seen_dashdash = j; | |
2202 | if (seen_dashdash) { | |
f4421325 | 2203 | /* (2) */ |
cee7f245 | 2204 | if (seen_dashdash + 1 != argc - 1) |
acca687f | 2205 | usage(blame_usage); |
20239bae | 2206 | path = add_prefix(prefix, argv[seen_dashdash + 1]); |
cee7f245 JH |
2207 | for (j = i; j < seen_dashdash; j++) |
2208 | argv[unk++] = argv[j]; | |
2209 | } | |
2210 | else { | |
2211 | /* (3) */ | |
f4421325 TK |
2212 | if (argc <= i) |
2213 | usage(blame_usage); | |
20239bae | 2214 | path = add_prefix(prefix, argv[i]); |
cee7f245 JH |
2215 | if (i + 1 == argc - 1) { |
2216 | final_commit_name = argv[i + 1]; | |
2217 | ||
2218 | /* if (unk == 1) we could be getting | |
2219 | * old-style | |
2220 | */ | |
2221 | if (unk == 1 && !has_path_in_work_tree(path)) { | |
20239bae | 2222 | path = add_prefix(prefix, argv[i + 1]); |
cee7f245 JH |
2223 | final_commit_name = argv[i]; |
2224 | } | |
2225 | } | |
2226 | else if (i != argc - 1) | |
acca687f | 2227 | usage(blame_usage); /* garbage at end */ |
cee7f245 JH |
2228 | |
2229 | if (!has_path_in_work_tree(path)) | |
2230 | die("cannot stat path %s: %s", | |
2231 | path, strerror(errno)); | |
2232 | } | |
2233 | } | |
2234 | ||
2235 | if (final_commit_name) | |
2236 | argv[unk++] = final_commit_name; | |
2237 | ||
1732a1fd JH |
2238 | /* |
2239 | * Now we got rev and path. We do not want the path pruning | |
cee7f245 JH |
2240 | * but we may want "bottom" processing. |
2241 | */ | |
6bee4e40 | 2242 | argv[unk++] = "--"; /* terminate the rev name */ |
cee7f245 JH |
2243 | argv[unk] = NULL; |
2244 | ||
2245 | init_revisions(&revs, NULL); | |
1cfe7733 | 2246 | setup_revisions(unk, argv, &revs, NULL); |
cee7f245 JH |
2247 | memset(&sb, 0, sizeof(sb)); |
2248 | ||
1732a1fd JH |
2249 | /* |
2250 | * There must be one and only one positive commit in the | |
cee7f245 JH |
2251 | * revs->pending array. |
2252 | */ | |
2253 | for (i = 0; i < revs.pending.nr; i++) { | |
2254 | struct object *obj = revs.pending.objects[i].item; | |
2255 | if (obj->flags & UNINTERESTING) | |
2256 | continue; | |
2257 | while (obj->type == OBJ_TAG) | |
2258 | obj = deref_tag(obj, NULL, 0); | |
2259 | if (obj->type != OBJ_COMMIT) | |
2260 | die("Non commit %s?", | |
2261 | revs.pending.objects[i].name); | |
2262 | if (sb.final) | |
2263 | die("More than one commit to dig from %s and %s?", | |
2264 | revs.pending.objects[i].name, | |
2265 | final_commit_name); | |
2266 | sb.final = (struct commit *) obj; | |
2267 | final_commit_name = revs.pending.objects[i].name; | |
2268 | } | |
2269 | ||
2270 | if (!sb.final) { | |
1732a1fd JH |
2271 | /* |
2272 | * "--not A B -- path" without anything positive; | |
1cfe7733 JH |
2273 | * do not default to HEAD, but use the working tree |
2274 | * or "--contents". | |
1732a1fd | 2275 | */ |
1cfe7733 JH |
2276 | sb.final = fake_working_tree_commit(path, contents_from); |
2277 | add_pending_object(&revs, &(sb.final->object), ":"); | |
cee7f245 | 2278 | } |
1cfe7733 JH |
2279 | else if (contents_from) |
2280 | die("Cannot use --contents with final commit object name"); | |
cee7f245 | 2281 | |
1732a1fd JH |
2282 | /* |
2283 | * If we have bottom, this will mark the ancestors of the | |
cee7f245 JH |
2284 | * bottom commits we would reach while traversing as |
2285 | * uninteresting. | |
2286 | */ | |
2287 | prepare_revision_walk(&revs); | |
2288 | ||
1cfe7733 JH |
2289 | if (is_null_sha1(sb.final->object.sha1)) { |
2290 | char *buf; | |
2291 | o = sb.final->util; | |
2292 | buf = xmalloc(o->file.size + 1); | |
2293 | memcpy(buf, o->file.ptr, o->file.size + 1); | |
2294 | sb.final_buf = buf; | |
2295 | sb.final_buf_size = o->file.size; | |
2296 | } | |
2297 | else { | |
2298 | o = get_origin(&sb, sb.final, path); | |
2299 | if (fill_blob_sha1(o)) | |
2300 | die("no such path %s in %s", path, final_commit_name); | |
cee7f245 | 2301 | |
21666f1a | 2302 | sb.final_buf = read_sha1_file(o->blob_sha1, &type, |
1cfe7733 JH |
2303 | &sb.final_buf_size); |
2304 | } | |
c2e525d9 | 2305 | num_read_blob++; |
cee7f245 JH |
2306 | lno = prepare_lines(&sb); |
2307 | ||
931233bc JH |
2308 | bottom = top = 0; |
2309 | if (bottomtop) | |
2310 | prepare_blame_range(&sb, bottomtop, lno, &bottom, &top); | |
2311 | if (bottom && top && top < bottom) { | |
2312 | long tmp; | |
2313 | tmp = top; top = bottom; bottom = tmp; | |
2314 | } | |
cee7f245 JH |
2315 | if (bottom < 1) |
2316 | bottom = 1; | |
2317 | if (top < 1) | |
2318 | top = lno; | |
2319 | bottom--; | |
2320 | if (lno < top) | |
2321 | die("file %s has only %lu lines", path, lno); | |
2322 | ||
2323 | ent = xcalloc(1, sizeof(*ent)); | |
2324 | ent->lno = bottom; | |
2325 | ent->num_lines = top - bottom; | |
2326 | ent->suspect = o; | |
2327 | ent->s_lno = bottom; | |
2328 | ||
2329 | sb.ent = ent; | |
2330 | sb.path = path; | |
2331 | ||
2332 | if (revs_file && read_ancestry(revs_file)) | |
2333 | die("reading graft file %s failed: %s", | |
2334 | revs_file, strerror(errno)); | |
2335 | ||
d24bba80 | 2336 | assign_blame(&sb, &revs, opt); |
cee7f245 | 2337 | |
717d1462 LT |
2338 | if (incremental) |
2339 | return 0; | |
2340 | ||
cee7f245 JH |
2341 | coalesce(&sb); |
2342 | ||
2343 | if (!(output_option & OUTPUT_PORCELAIN)) | |
2344 | find_alignment(&sb, &output_option); | |
2345 | ||
2346 | output(&sb, output_option); | |
2347 | free((void *)sb.final_buf); | |
2348 | for (ent = sb.ent; ent; ) { | |
2349 | struct blame_entry *e = ent->next; | |
2350 | free(ent); | |
2351 | ent = e; | |
2352 | } | |
c2e525d9 | 2353 | |
870b39c1 | 2354 | if (show_stats) { |
c2e525d9 JH |
2355 | printf("num read blob: %d\n", num_read_blob); |
2356 | printf("num get patch: %d\n", num_get_patch); | |
2357 | printf("num commits: %d\n", num_commits); | |
2358 | } | |
cee7f245 JH |
2359 | return 0; |
2360 | } |