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Commit | Line | Data |
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8f1d2e6f | 1 | #include "cache.h" |
961784ee | 2 | #include "tag.h" |
175785e5 | 3 | #include "commit.h" |
177722b3 | 4 | #include "commit-graph.h" |
ed09aef0 | 5 | #include "pkt-line.h" |
52883fbd | 6 | #include "utf8.h" |
199c45bf JH |
7 | #include "diff.h" |
8 | #include "revision.h" | |
a97a7468 | 9 | #include "notes.h" |
ba3c69a9 | 10 | #include "gpg-interface.h" |
46905893 | 11 | #include "mergesort.h" |
a84b794a | 12 | #include "commit-slab.h" |
da24b104 | 13 | #include "prio-queue.h" |
0a9136f3 | 14 | #include "sha1-lookup.h" |
d76650b8 | 15 | #include "wt-status.h" |
175785e5 | 16 | |
82a75299 JH |
17 | static struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **); |
18 | ||
60ab26de LT |
19 | int save_commit_buffer = 1; |
20 | ||
175785e5 DB |
21 | const char *commit_type = "commit"; |
22 | ||
bc83266a | 23 | struct commit *lookup_commit_reference_gently(const struct object_id *oid, |
f76412ed | 24 | int quiet) |
961784ee | 25 | { |
c251c83d | 26 | struct object *obj = deref_tag(parse_object(oid), NULL, 0); |
961784ee LT |
27 | |
28 | if (!obj) | |
29 | return NULL; | |
8ff226a9 | 30 | return object_as_type(obj, OBJ_COMMIT, quiet); |
f76412ed JH |
31 | } |
32 | ||
bc83266a | 33 | struct commit *lookup_commit_reference(const struct object_id *oid) |
f76412ed | 34 | { |
bc83266a | 35 | return lookup_commit_reference_gently(oid, 0); |
961784ee LT |
36 | } |
37 | ||
bc83266a | 38 | struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref_name) |
baf18fc2 | 39 | { |
bc83266a | 40 | struct commit *c = lookup_commit_reference(oid); |
baf18fc2 NTND |
41 | if (!c) |
42 | die(_("could not parse %s"), ref_name); | |
bc83266a | 43 | if (oidcmp(oid, &c->object.oid)) { |
baf18fc2 | 44 | warning(_("%s %s is not a commit!"), |
bc83266a | 45 | ref_name, oid_to_hex(oid)); |
baf18fc2 NTND |
46 | } |
47 | return c; | |
48 | } | |
49 | ||
bc83266a | 50 | struct commit *lookup_commit(const struct object_id *oid) |
175785e5 | 51 | { |
bc83266a | 52 | struct object *obj = lookup_object(oid->hash); |
d36f51c1 | 53 | if (!obj) |
bc83266a | 54 | return create_object(oid->hash, alloc_commit_node()); |
8ff226a9 | 55 | return object_as_type(obj, OBJ_COMMIT, 0); |
175785e5 DB |
56 | } |
57 | ||
a6fa5992 PN |
58 | struct commit *lookup_commit_reference_by_name(const char *name) |
59 | { | |
7683e2e6 | 60 | struct object_id oid; |
a6fa5992 PN |
61 | struct commit *commit; |
62 | ||
e82caf38 | 63 | if (get_oid_committish(name, &oid)) |
a6fa5992 | 64 | return NULL; |
bc83266a | 65 | commit = lookup_commit_reference(&oid); |
5e7d4d3e | 66 | if (parse_commit(commit)) |
a6fa5992 PN |
67 | return NULL; |
68 | return commit; | |
69 | } | |
70 | ||
dddbad72 | 71 | static timestamp_t parse_commit_date(const char *buf, const char *tail) |
175785e5 | 72 | { |
0a617799 | 73 | const char *dateptr; |
175785e5 | 74 | |
0a617799 MK |
75 | if (buf + 6 >= tail) |
76 | return 0; | |
175785e5 DB |
77 | if (memcmp(buf, "author", 6)) |
78 | return 0; | |
0a617799 | 79 | while (buf < tail && *buf++ != '\n') |
175785e5 | 80 | /* nada */; |
0a617799 MK |
81 | if (buf + 9 >= tail) |
82 | return 0; | |
175785e5 DB |
83 | if (memcmp(buf, "committer", 9)) |
84 | return 0; | |
0a617799 | 85 | while (buf < tail && *buf++ != '>') |
175785e5 | 86 | /* nada */; |
0a617799 MK |
87 | if (buf >= tail) |
88 | return 0; | |
89 | dateptr = buf; | |
90 | while (buf < tail && *buf++ != '\n') | |
91 | /* nada */; | |
92 | if (buf >= tail) | |
93 | return 0; | |
1aeb7e75 JS |
94 | /* dateptr < buf && buf[-1] == '\n', so parsing will stop at buf-1 */ |
95 | return parse_timestamp(dateptr, NULL, 10); | |
175785e5 DB |
96 | } |
97 | ||
5040f17e | 98 | static struct commit_graft **commit_graft; |
5da5c8f4 JH |
99 | static int commit_graft_alloc, commit_graft_nr; |
100 | ||
0a9136f3 DD |
101 | static const unsigned char *commit_graft_sha1_access(size_t index, void *table) |
102 | { | |
103 | struct commit_graft **commit_graft_table = table; | |
7683e2e6 | 104 | return commit_graft_table[index]->oid.hash; |
0a9136f3 DD |
105 | } |
106 | ||
5da5c8f4 JH |
107 | static int commit_graft_pos(const unsigned char *sha1) |
108 | { | |
0a9136f3 DD |
109 | return sha1_pos(sha1, commit_graft, commit_graft_nr, |
110 | commit_graft_sha1_access); | |
5da5c8f4 JH |
111 | } |
112 | ||
5040f17e JH |
113 | int register_commit_graft(struct commit_graft *graft, int ignore_dups) |
114 | { | |
7683e2e6 | 115 | int pos = commit_graft_pos(graft->oid.hash); |
a6080a0a | 116 | |
5040f17e JH |
117 | if (0 <= pos) { |
118 | if (ignore_dups) | |
119 | free(graft); | |
120 | else { | |
121 | free(commit_graft[pos]); | |
122 | commit_graft[pos] = graft; | |
123 | } | |
124 | return 1; | |
125 | } | |
126 | pos = -pos - 1; | |
d6e82b57 DD |
127 | ALLOC_GROW(commit_graft, commit_graft_nr + 1, commit_graft_alloc); |
128 | commit_graft_nr++; | |
5040f17e | 129 | if (pos < commit_graft_nr) |
f919ffeb SG |
130 | MOVE_ARRAY(commit_graft + pos + 1, commit_graft + pos, |
131 | commit_graft_nr - pos - 1); | |
5040f17e JH |
132 | commit_graft[pos] = graft; |
133 | return 0; | |
134 | } | |
135 | ||
9a934032 | 136 | struct commit_graft *read_graft_line(struct strbuf *line) |
5040f17e JH |
137 | { |
138 | /* The format is just "Commit Parent1 Parent2 ...\n" */ | |
cfa5bf16 PO |
139 | int i, phase; |
140 | const char *tail = NULL; | |
5040f17e | 141 | struct commit_graft *graft = NULL; |
cfa5bf16 | 142 | struct object_id dummy_oid, *oid; |
5040f17e | 143 | |
9a934032 PO |
144 | strbuf_rtrim(line); |
145 | if (!line->len || line->buf[0] == '#') | |
5bc4ce58 | 146 | return NULL; |
cfa5bf16 PO |
147 | /* |
148 | * phase 0 verifies line, counts hashes in line and allocates graft | |
149 | * phase 1 fills graft | |
150 | */ | |
151 | for (phase = 0; phase < 2; phase++) { | |
152 | oid = graft ? &graft->oid : &dummy_oid; | |
153 | if (parse_oid_hex(line->buf, oid, &tail)) | |
5040f17e | 154 | goto bad_graft_data; |
cfa5bf16 PO |
155 | for (i = 0; *tail != '\0'; i++) { |
156 | oid = graft ? &graft->parent[i] : &dummy_oid; | |
157 | if (!isspace(*tail++) || parse_oid_hex(tail, oid, &tail)) | |
158 | goto bad_graft_data; | |
159 | } | |
160 | if (!graft) { | |
161 | graft = xmalloc(st_add(sizeof(*graft), | |
162 | st_mult(sizeof(struct object_id), i))); | |
163 | graft->nr_parent = i; | |
164 | } | |
5040f17e JH |
165 | } |
166 | return graft; | |
df5d43be RT |
167 | |
168 | bad_graft_data: | |
9a934032 | 169 | error("bad graft data: %s", line->buf); |
cfa5bf16 | 170 | assert(!graft); |
df5d43be | 171 | return NULL; |
5040f17e JH |
172 | } |
173 | ||
c5ae6439 | 174 | static int read_graft_file(const char *graft_file) |
5da5c8f4 | 175 | { |
e9d983f1 | 176 | FILE *fp = fopen_or_warn(graft_file, "r"); |
e228c173 | 177 | struct strbuf buf = STRBUF_INIT; |
5040f17e JH |
178 | if (!fp) |
179 | return -1; | |
e228c173 | 180 | while (!strbuf_getwholeline(&buf, fp, '\n')) { |
5da5c8f4 | 181 | /* The format is just "Commit Parent1 Parent2 ...\n" */ |
9a934032 | 182 | struct commit_graft *graft = read_graft_line(&buf); |
5bc4ce58 JH |
183 | if (!graft) |
184 | continue; | |
5040f17e | 185 | if (register_commit_graft(graft, 1)) |
e228c173 | 186 | error("duplicate graft data: %s", buf.buf); |
5da5c8f4 JH |
187 | } |
188 | fclose(fp); | |
e228c173 | 189 | strbuf_release(&buf); |
5040f17e JH |
190 | return 0; |
191 | } | |
192 | ||
193 | static void prepare_commit_graft(void) | |
194 | { | |
195 | static int commit_graft_prepared; | |
196 | char *graft_file; | |
197 | ||
198 | if (commit_graft_prepared) | |
199 | return; | |
200 | graft_file = get_graft_file(); | |
201 | read_graft_file(graft_file); | |
ed09aef0 JS |
202 | /* make sure shallows are read */ |
203 | is_repository_shallow(); | |
5040f17e | 204 | commit_graft_prepared = 1; |
5da5c8f4 JH |
205 | } |
206 | ||
8b65a34c | 207 | struct commit_graft *lookup_commit_graft(const struct object_id *oid) |
5da5c8f4 JH |
208 | { |
209 | int pos; | |
5040f17e | 210 | prepare_commit_graft(); |
8b65a34c | 211 | pos = commit_graft_pos(oid->hash); |
5da5c8f4 JH |
212 | if (pos < 0) |
213 | return NULL; | |
214 | return commit_graft[pos]; | |
215 | } | |
216 | ||
09d46644 | 217 | int for_each_commit_graft(each_commit_graft_fn fn, void *cb_data) |
ed09aef0 | 218 | { |
09d46644 NTND |
219 | int i, ret; |
220 | for (i = ret = 0; i < commit_graft_nr && !ret; i++) | |
221 | ret = fn(commit_graft[i], cb_data); | |
222 | return ret; | |
ed09aef0 JS |
223 | } |
224 | ||
e92b848c | 225 | int unregister_shallow(const struct object_id *oid) |
f53514bc | 226 | { |
e92b848c | 227 | int pos = commit_graft_pos(oid->hash); |
f53514bc JS |
228 | if (pos < 0) |
229 | return -1; | |
230 | if (pos + 1 < commit_graft_nr) | |
f331ab9d RS |
231 | MOVE_ARRAY(commit_graft + pos, commit_graft + pos + 1, |
232 | commit_graft_nr - pos - 1); | |
f53514bc JS |
233 | commit_graft_nr--; |
234 | return 0; | |
235 | } | |
236 | ||
8597ea3a JK |
237 | struct commit_buffer { |
238 | void *buffer; | |
239 | unsigned long size; | |
240 | }; | |
241 | define_commit_slab(buffer_slab, struct commit_buffer); | |
c1b3c71f JK |
242 | static struct buffer_slab buffer_slab = COMMIT_SLAB_INIT(1, buffer_slab); |
243 | ||
8597ea3a | 244 | void set_commit_buffer(struct commit *commit, void *buffer, unsigned long size) |
66c2827e | 245 | { |
8597ea3a JK |
246 | struct commit_buffer *v = buffer_slab_at(&buffer_slab, commit); |
247 | v->buffer = buffer; | |
248 | v->size = size; | |
66c2827e JK |
249 | } |
250 | ||
8597ea3a | 251 | const void *get_cached_commit_buffer(const struct commit *commit, unsigned long *sizep) |
152ff1cc | 252 | { |
862e730e JH |
253 | struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); |
254 | if (!v) { | |
255 | if (sizep) | |
256 | *sizep = 0; | |
257 | return NULL; | |
258 | } | |
8597ea3a JK |
259 | if (sizep) |
260 | *sizep = v->size; | |
261 | return v->buffer; | |
152ff1cc JK |
262 | } |
263 | ||
8597ea3a | 264 | const void *get_commit_buffer(const struct commit *commit, unsigned long *sizep) |
152ff1cc | 265 | { |
8597ea3a | 266 | const void *ret = get_cached_commit_buffer(commit, sizep); |
152ff1cc JK |
267 | if (!ret) { |
268 | enum object_type type; | |
269 | unsigned long size; | |
b4f5aca4 | 270 | ret = read_object_file(&commit->object.oid, &type, &size); |
152ff1cc JK |
271 | if (!ret) |
272 | die("cannot read commit object %s", | |
f2fd0760 | 273 | oid_to_hex(&commit->object.oid)); |
152ff1cc JK |
274 | if (type != OBJ_COMMIT) |
275 | die("expected commit for %s, got %s", | |
debca9d2 | 276 | oid_to_hex(&commit->object.oid), type_name(type)); |
8597ea3a JK |
277 | if (sizep) |
278 | *sizep = size; | |
152ff1cc JK |
279 | } |
280 | return ret; | |
281 | } | |
282 | ||
283 | void unuse_commit_buffer(const struct commit *commit, const void *buffer) | |
284 | { | |
862e730e JH |
285 | struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); |
286 | if (!(v && v->buffer == buffer)) | |
152ff1cc JK |
287 | free((void *)buffer); |
288 | } | |
289 | ||
0fb370da JK |
290 | void free_commit_buffer(struct commit *commit) |
291 | { | |
862e730e JH |
292 | struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); |
293 | if (v) { | |
6a83d902 | 294 | FREE_AND_NULL(v->buffer); |
862e730e JH |
295 | v->size = 0; |
296 | } | |
0fb370da JK |
297 | } |
298 | ||
8597ea3a | 299 | const void *detach_commit_buffer(struct commit *commit, unsigned long *sizep) |
0fb370da | 300 | { |
862e730e | 301 | struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); |
8597ea3a JK |
302 | void *ret; |
303 | ||
862e730e JH |
304 | if (!v) { |
305 | if (sizep) | |
306 | *sizep = 0; | |
307 | return NULL; | |
308 | } | |
8597ea3a JK |
309 | ret = v->buffer; |
310 | if (sizep) | |
311 | *sizep = v->size; | |
312 | ||
313 | v->buffer = NULL; | |
314 | v->size = 0; | |
0fb370da JK |
315 | return ret; |
316 | } | |
317 | ||
cf7b1cad | 318 | int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long size) |
175785e5 | 319 | { |
cf7b1cad NTND |
320 | const char *tail = buffer; |
321 | const char *bufptr = buffer; | |
7683e2e6 | 322 | struct object_id parent; |
6c88be16 | 323 | struct commit_list **pptr; |
5da5c8f4 | 324 | struct commit_graft *graft; |
7683e2e6 | 325 | const int tree_entry_len = GIT_SHA1_HEXSZ + 5; |
326 | const int parent_entry_len = GIT_SHA1_HEXSZ + 7; | |
bd2c39f5 | 327 | |
175785e5 DB |
328 | if (item->object.parsed) |
329 | return 0; | |
330 | item->object.parsed = 1; | |
3b44f15a | 331 | tail += size; |
7683e2e6 | 332 | if (tail <= bufptr + tree_entry_len + 1 || memcmp(bufptr, "tree ", 5) || |
333 | bufptr[tree_entry_len] != '\n') | |
f2fd0760 | 334 | return error("bogus commit object %s", oid_to_hex(&item->object.oid)); |
7683e2e6 | 335 | if (get_sha1_hex(bufptr + 5, parent.hash) < 0) |
bd2afde8 | 336 | return error("bad tree pointer in commit %s", |
f2fd0760 | 337 | oid_to_hex(&item->object.oid)); |
740ee055 | 338 | item->tree = lookup_tree(&parent); |
7683e2e6 | 339 | bufptr += tree_entry_len + 1; /* "tree " + "hex sha1" + "\n" */ |
6c88be16 | 340 | pptr = &item->parents; |
5da5c8f4 | 341 | |
8b65a34c | 342 | graft = lookup_commit_graft(&item->object.oid); |
7683e2e6 | 343 | while (bufptr + parent_entry_len < tail && !memcmp(bufptr, "parent ", 7)) { |
f7cc77d7 LT |
344 | struct commit *new_parent; |
345 | ||
7683e2e6 | 346 | if (tail <= bufptr + parent_entry_len + 1 || |
347 | get_sha1_hex(bufptr + 7, parent.hash) || | |
348 | bufptr[parent_entry_len] != '\n') | |
f2fd0760 | 349 | return error("bad parents in commit %s", oid_to_hex(&item->object.oid)); |
7683e2e6 | 350 | bufptr += parent_entry_len + 1; |
7f3140cd JS |
351 | /* |
352 | * The clone is shallow if nr_parent < 0, and we must | |
353 | * not traverse its real parents even when we unhide them. | |
354 | */ | |
355 | if (graft && (graft->nr_parent < 0 || grafts_replace_parents)) | |
5da5c8f4 | 356 | continue; |
bc83266a | 357 | new_parent = lookup_commit(&parent); |
39468def | 358 | if (new_parent) |
6c88be16 | 359 | pptr = &commit_list_insert(new_parent, pptr)->next; |
5da5c8f4 JH |
360 | } |
361 | if (graft) { | |
362 | int i; | |
363 | struct commit *new_parent; | |
364 | for (i = 0; i < graft->nr_parent; i++) { | |
bc83266a | 365 | new_parent = lookup_commit(&graft->parent[i]); |
5da5c8f4 JH |
366 | if (!new_parent) |
367 | continue; | |
368 | pptr = &commit_list_insert(new_parent, pptr)->next; | |
5da5c8f4 | 369 | } |
175785e5 | 370 | } |
0a617799 | 371 | item->date = parse_commit_date(bufptr, tail); |
27dedf0c | 372 | |
175785e5 DB |
373 | return 0; |
374 | } | |
375 | ||
9cc2b07a | 376 | int parse_commit_gently(struct commit *item, int quiet_on_missing) |
bd2c39f5 | 377 | { |
21666f1a | 378 | enum object_type type; |
bd2c39f5 NP |
379 | void *buffer; |
380 | unsigned long size; | |
381 | int ret; | |
382 | ||
9786f68b MK |
383 | if (!item) |
384 | return -1; | |
bd2c39f5 NP |
385 | if (item->object.parsed) |
386 | return 0; | |
177722b3 DS |
387 | if (parse_commit_in_graph(item)) |
388 | return 0; | |
b4f5aca4 | 389 | buffer = read_object_file(&item->object.oid, &type, &size); |
bd2c39f5 | 390 | if (!buffer) |
9cc2b07a JK |
391 | return quiet_on_missing ? -1 : |
392 | error("Could not read %s", | |
f2fd0760 | 393 | oid_to_hex(&item->object.oid)); |
21666f1a | 394 | if (type != OBJ_COMMIT) { |
bd2c39f5 NP |
395 | free(buffer); |
396 | return error("Object %s not a commit", | |
f2fd0760 | 397 | oid_to_hex(&item->object.oid)); |
bd2c39f5 NP |
398 | } |
399 | ret = parse_commit_buffer(item, buffer, size); | |
60ab26de | 400 | if (save_commit_buffer && !ret) { |
8597ea3a | 401 | set_commit_buffer(item, buffer, size); |
3ff1fbbb LT |
402 | return 0; |
403 | } | |
bd2c39f5 NP |
404 | free(buffer); |
405 | return ret; | |
406 | } | |
407 | ||
7059dccc JK |
408 | void parse_commit_or_die(struct commit *item) |
409 | { | |
410 | if (parse_commit(item)) | |
411 | die("unable to parse commit %s", | |
f2fd0760 | 412 | item ? oid_to_hex(&item->object.oid) : "(null)"); |
7059dccc JK |
413 | } |
414 | ||
11af2aae CC |
415 | int find_commit_subject(const char *commit_buffer, const char **subject) |
416 | { | |
417 | const char *eol; | |
418 | const char *p = commit_buffer; | |
419 | ||
420 | while (*p && (*p != '\n' || p[1] != '\n')) | |
421 | p++; | |
422 | if (*p) { | |
4e1b06da | 423 | p = skip_blank_lines(p + 2); |
9c9b03b1 | 424 | eol = strchrnul(p, '\n'); |
11af2aae CC |
425 | } else |
426 | eol = p; | |
427 | ||
428 | *subject = p; | |
429 | ||
430 | return eol - p; | |
431 | } | |
432 | ||
ac5155ef | 433 | struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p) |
dd97f850 | 434 | { |
812666c8 | 435 | struct commit_list *new_list = xmalloc(sizeof(struct commit_list)); |
dd97f850 DB |
436 | new_list->item = item; |
437 | new_list->next = *list_p; | |
438 | *list_p = new_list; | |
ac5155ef | 439 | return new_list; |
dd97f850 DB |
440 | } |
441 | ||
65319475 MV |
442 | unsigned commit_list_count(const struct commit_list *l) |
443 | { | |
444 | unsigned c = 0; | |
445 | for (; l; l = l->next ) | |
446 | c++; | |
447 | return c; | |
448 | } | |
449 | ||
53d00b39 TR |
450 | struct commit_list *copy_commit_list(struct commit_list *list) |
451 | { | |
452 | struct commit_list *head = NULL; | |
453 | struct commit_list **pp = &head; | |
454 | while (list) { | |
cb979dbd | 455 | pp = commit_list_append(list->item, pp); |
53d00b39 TR |
456 | list = list->next; |
457 | } | |
458 | return head; | |
459 | } | |
460 | ||
175785e5 DB |
461 | void free_commit_list(struct commit_list *list) |
462 | { | |
e510ab89 RS |
463 | while (list) |
464 | pop_commit(&list); | |
175785e5 | 465 | } |
dd97f850 | 466 | |
47e44ed1 | 467 | struct commit_list * commit_list_insert_by_date(struct commit *item, struct commit_list **list) |
dd97f850 DB |
468 | { |
469 | struct commit_list **pp = list; | |
470 | struct commit_list *p; | |
471 | while ((p = *pp) != NULL) { | |
472 | if (p->item->date < item->date) { | |
473 | break; | |
474 | } | |
475 | pp = &p->next; | |
476 | } | |
f755494c | 477 | return commit_list_insert(item, pp); |
dd97f850 DB |
478 | } |
479 | ||
46905893 RS |
480 | static int commit_list_compare_by_date(const void *a, const void *b) |
481 | { | |
dddbad72 JS |
482 | timestamp_t a_date = ((const struct commit_list *)a)->item->date; |
483 | timestamp_t b_date = ((const struct commit_list *)b)->item->date; | |
46905893 RS |
484 | if (a_date < b_date) |
485 | return 1; | |
486 | if (a_date > b_date) | |
487 | return -1; | |
488 | return 0; | |
489 | } | |
490 | ||
491 | static void *commit_list_get_next(const void *a) | |
492 | { | |
493 | return ((const struct commit_list *)a)->next; | |
494 | } | |
495 | ||
496 | static void commit_list_set_next(void *a, void *next) | |
497 | { | |
498 | ((struct commit_list *)a)->next = next; | |
499 | } | |
a6080a0a | 500 | |
47e44ed1 | 501 | void commit_list_sort_by_date(struct commit_list **list) |
dd97f850 | 502 | { |
7365c95d JH |
503 | *list = llist_mergesort(*list, commit_list_get_next, commit_list_set_next, |
504 | commit_list_compare_by_date); | |
dd97f850 DB |
505 | } |
506 | ||
58e28af6 DB |
507 | struct commit *pop_most_recent_commit(struct commit_list **list, |
508 | unsigned int mark) | |
dd97f850 | 509 | { |
e510ab89 | 510 | struct commit *ret = pop_commit(list); |
dd97f850 | 511 | struct commit_list *parents = ret->parents; |
dd97f850 DB |
512 | |
513 | while (parents) { | |
4056c091 | 514 | struct commit *commit = parents->item; |
dec38c81 | 515 | if (!parse_commit(commit) && !(commit->object.flags & mark)) { |
58e28af6 | 516 | commit->object.flags |= mark; |
47e44ed1 | 517 | commit_list_insert_by_date(commit, list); |
4056c091 | 518 | } |
dd97f850 DB |
519 | parents = parents->next; |
520 | } | |
521 | return ret; | |
522 | } | |
e3bc7a3b | 523 | |
941ba8db NTND |
524 | static void clear_commit_marks_1(struct commit_list **plist, |
525 | struct commit *commit, unsigned int mark) | |
f8f9c73c | 526 | { |
60fcc2e6 JS |
527 | while (commit) { |
528 | struct commit_list *parents; | |
f8f9c73c | 529 | |
60fcc2e6 JS |
530 | if (!(mark & commit->object.flags)) |
531 | return; | |
58ecf5c1 | 532 | |
60fcc2e6 JS |
533 | commit->object.flags &= ~mark; |
534 | ||
535 | parents = commit->parents; | |
536 | if (!parents) | |
537 | return; | |
538 | ||
539 | while ((parents = parents->next)) | |
941ba8db | 540 | commit_list_insert(parents->item, plist); |
60fcc2e6 JS |
541 | |
542 | commit = commit->parents->item; | |
f8f9c73c JH |
543 | } |
544 | } | |
545 | ||
e895cb51 | 546 | void clear_commit_marks_many(int nr, struct commit **commit, unsigned int mark) |
941ba8db NTND |
547 | { |
548 | struct commit_list *list = NULL; | |
e895cb51 JH |
549 | |
550 | while (nr--) { | |
07f7d55a | 551 | clear_commit_marks_1(&list, *commit, mark); |
e895cb51 JH |
552 | commit++; |
553 | } | |
941ba8db NTND |
554 | while (list) |
555 | clear_commit_marks_1(&list, pop_commit(&list), mark); | |
556 | } | |
557 | ||
e895cb51 JH |
558 | void clear_commit_marks(struct commit *commit, unsigned int mark) |
559 | { | |
560 | clear_commit_marks_many(1, &commit, mark); | |
561 | } | |
562 | ||
a3437b8c JS |
563 | struct commit *pop_commit(struct commit_list **stack) |
564 | { | |
565 | struct commit_list *top = *stack; | |
566 | struct commit *item = top ? top->item : NULL; | |
567 | ||
568 | if (top) { | |
569 | *stack = top->next; | |
570 | free(top); | |
571 | } | |
572 | return item; | |
573 | } | |
574 | ||
a84b794a JH |
575 | /* |
576 | * Topological sort support | |
577 | */ | |
96c4f4a3 | 578 | |
a84b794a JH |
579 | /* count number of children that have not been emitted */ |
580 | define_commit_slab(indegree_slab, int); | |
96c4f4a3 | 581 | |
81c6b38b JH |
582 | /* record author-date for each commit object */ |
583 | define_commit_slab(author_date_slab, unsigned long); | |
584 | ||
585 | static void record_author_date(struct author_date_slab *author_date, | |
586 | struct commit *commit) | |
587 | { | |
8597ea3a | 588 | const char *buffer = get_commit_buffer(commit, NULL); |
81c6b38b | 589 | struct ident_split ident; |
ea5517f0 JK |
590 | const char *ident_line; |
591 | size_t ident_len; | |
81c6b38b | 592 | char *date_end; |
dddbad72 | 593 | timestamp_t date; |
81c6b38b | 594 | |
ea5517f0 JK |
595 | ident_line = find_commit_header(buffer, "author", &ident_len); |
596 | if (!ident_line) | |
597 | goto fail_exit; /* no author line */ | |
598 | if (split_ident_line(&ident, ident_line, ident_len) || | |
599 | !ident.date_begin || !ident.date_end) | |
600 | goto fail_exit; /* malformed "author" line */ | |
81c6b38b | 601 | |
1aeb7e75 | 602 | date = parse_timestamp(ident.date_begin, &date_end, 10); |
81c6b38b JH |
603 | if (date_end != ident.date_end) |
604 | goto fail_exit; /* malformed date */ | |
605 | *(author_date_slab_at(author_date, commit)) = date; | |
606 | ||
607 | fail_exit: | |
ba41c1c9 | 608 | unuse_commit_buffer(commit, buffer); |
81c6b38b JH |
609 | } |
610 | ||
611 | static int compare_commits_by_author_date(const void *a_, const void *b_, | |
612 | void *cb_data) | |
613 | { | |
614 | const struct commit *a = a_, *b = b_; | |
615 | struct author_date_slab *author_date = cb_data; | |
dddbad72 JS |
616 | timestamp_t a_date = *(author_date_slab_at(author_date, a)); |
617 | timestamp_t b_date = *(author_date_slab_at(author_date, b)); | |
81c6b38b JH |
618 | |
619 | /* newer commits with larger date first */ | |
620 | if (a_date < b_date) | |
621 | return 1; | |
622 | else if (a_date > b_date) | |
623 | return -1; | |
624 | return 0; | |
625 | } | |
626 | ||
727377ff | 627 | int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused) |
da24b104 JH |
628 | { |
629 | const struct commit *a = a_, *b = b_; | |
630 | /* newer commits with larger date first */ | |
631 | if (a->date < b->date) | |
632 | return 1; | |
633 | else if (a->date > b->date) | |
634 | return -1; | |
635 | return 0; | |
636 | } | |
637 | ||
ab580ace JS |
638 | /* |
639 | * Performs an in-place topological sort on the list supplied. | |
640 | */ | |
da24b104 | 641 | void sort_in_topological_order(struct commit_list **list, enum rev_sort_order sort_order) |
6b6dcfc2 | 642 | { |
23c17d4a | 643 | struct commit_list *next, *orig = *list; |
23c17d4a | 644 | struct commit_list **pptr; |
a84b794a | 645 | struct indegree_slab indegree; |
da24b104 JH |
646 | struct prio_queue queue; |
647 | struct commit *commit; | |
81c6b38b | 648 | struct author_date_slab author_date; |
a6080a0a | 649 | |
23c17d4a | 650 | if (!orig) |
7d6fb370 | 651 | return; |
23c17d4a LT |
652 | *list = NULL; |
653 | ||
a84b794a | 654 | init_indegree_slab(&indegree); |
da24b104 | 655 | memset(&queue, '\0', sizeof(queue)); |
81c6b38b | 656 | |
da24b104 JH |
657 | switch (sort_order) { |
658 | default: /* REV_SORT_IN_GRAPH_ORDER */ | |
659 | queue.compare = NULL; | |
660 | break; | |
661 | case REV_SORT_BY_COMMIT_DATE: | |
662 | queue.compare = compare_commits_by_commit_date; | |
663 | break; | |
81c6b38b JH |
664 | case REV_SORT_BY_AUTHOR_DATE: |
665 | init_author_date_slab(&author_date); | |
666 | queue.compare = compare_commits_by_author_date; | |
667 | queue.cb_data = &author_date; | |
668 | break; | |
da24b104 | 669 | } |
96c4f4a3 | 670 | |
23c17d4a LT |
671 | /* Mark them and clear the indegree */ |
672 | for (next = orig; next; next = next->next) { | |
673 | struct commit *commit = next->item; | |
a84b794a | 674 | *(indegree_slab_at(&indegree, commit)) = 1; |
81c6b38b JH |
675 | /* also record the author dates, if needed */ |
676 | if (sort_order == REV_SORT_BY_AUTHOR_DATE) | |
677 | record_author_date(&author_date, commit); | |
ab580ace | 678 | } |
23c17d4a | 679 | |
ab580ace | 680 | /* update the indegree */ |
23c17d4a | 681 | for (next = orig; next; next = next->next) { |
da24b104 | 682 | struct commit_list *parents = next->item->parents; |
ab580ace | 683 | while (parents) { |
23c17d4a | 684 | struct commit *parent = parents->item; |
a84b794a | 685 | int *pi = indegree_slab_at(&indegree, parent); |
6b6dcfc2 | 686 | |
96c4f4a3 JK |
687 | if (*pi) |
688 | (*pi)++; | |
23c17d4a | 689 | parents = parents->next; |
ab580ace | 690 | } |
ab580ace | 691 | } |
23c17d4a | 692 | |
a6080a0a | 693 | /* |
674d1727 PH |
694 | * find the tips |
695 | * | |
696 | * tips are nodes not reachable from any other node in the list | |
697 | * | |
698 | * the tips serve as a starting set for the work queue. | |
699 | */ | |
23c17d4a LT |
700 | for (next = orig; next; next = next->next) { |
701 | struct commit *commit = next->item; | |
ab580ace | 702 | |
a84b794a | 703 | if (*(indegree_slab_at(&indegree, commit)) == 1) |
da24b104 | 704 | prio_queue_put(&queue, commit); |
ab580ace | 705 | } |
4c8725f1 | 706 | |
da24b104 JH |
707 | /* |
708 | * This is unfortunate; the initial tips need to be shown | |
709 | * in the order given from the revision traversal machinery. | |
710 | */ | |
711 | if (sort_order == REV_SORT_IN_GRAPH_ORDER) | |
712 | prio_queue_reverse(&queue); | |
713 | ||
714 | /* We no longer need the commit list */ | |
715 | free_commit_list(orig); | |
23c17d4a LT |
716 | |
717 | pptr = list; | |
718 | *list = NULL; | |
da24b104 JH |
719 | while ((commit = prio_queue_get(&queue)) != NULL) { |
720 | struct commit_list *parents; | |
23c17d4a | 721 | |
23c17d4a | 722 | for (parents = commit->parents; parents ; parents = parents->next) { |
cd2b8ae9 | 723 | struct commit *parent = parents->item; |
a84b794a | 724 | int *pi = indegree_slab_at(&indegree, parent); |
23c17d4a | 725 | |
96c4f4a3 | 726 | if (!*pi) |
23c17d4a LT |
727 | continue; |
728 | ||
729 | /* | |
730 | * parents are only enqueued for emission | |
731 | * when all their children have been emitted thereby | |
732 | * guaranteeing topological order. | |
733 | */ | |
da24b104 JH |
734 | if (--(*pi) == 1) |
735 | prio_queue_put(&queue, parent); | |
ab580ace JS |
736 | } |
737 | /* | |
da24b104 JH |
738 | * all children of commit have already been |
739 | * emitted. we can emit it now. | |
674d1727 | 740 | */ |
a84b794a | 741 | *(indegree_slab_at(&indegree, commit)) = 0; |
da24b104 JH |
742 | |
743 | pptr = &commit_list_insert(commit, pptr)->next; | |
ab580ace | 744 | } |
96c4f4a3 | 745 | |
a84b794a | 746 | clear_indegree_slab(&indegree); |
da24b104 | 747 | clear_prio_queue(&queue); |
81c6b38b JH |
748 | if (sort_order == REV_SORT_BY_AUTHOR_DATE) |
749 | clear_author_date_slab(&author_date); | |
ab580ace | 750 | } |
7c6f8aaf | 751 | |
1295228d | 752 | /* merge-base stuff */ |
7c6f8aaf | 753 | |
208acbfb | 754 | /* Remember to update object flag allocation in object.h */ |
577ed5c2 JH |
755 | #define PARENT1 (1u<<16) |
756 | #define PARENT2 (1u<<17) | |
757 | #define STALE (1u<<18) | |
758 | #define RESULT (1u<<19) | |
7c6f8aaf | 759 | |
1295228d JH |
760 | static const unsigned all_flags = (PARENT1 | PARENT2 | STALE | RESULT); |
761 | ||
73f43f22 | 762 | static int queue_has_nonstale(struct prio_queue *queue) |
7c6f8aaf | 763 | { |
73f43f22 JK |
764 | int i; |
765 | for (i = 0; i < queue->nr; i++) { | |
766 | struct commit *commit = queue->array[i].data; | |
767 | if (!(commit->object.flags & STALE)) | |
768 | return 1; | |
7c6f8aaf | 769 | } |
73f43f22 | 770 | return 0; |
7c6f8aaf JS |
771 | } |
772 | ||
d866924a | 773 | /* all input commits in one and twos[] must have been parsed! */ |
da1f5156 | 774 | static struct commit_list *paint_down_to_common(struct commit *one, int n, struct commit **twos) |
7c6f8aaf | 775 | { |
73f43f22 | 776 | struct prio_queue queue = { compare_commits_by_commit_date }; |
7c6f8aaf | 777 | struct commit_list *result = NULL; |
6a938648 | 778 | int i; |
7c6f8aaf | 779 | |
f3249438 | 780 | one->object.flags |= PARENT1; |
73f43f22 JK |
781 | if (!n) { |
782 | commit_list_append(one, &result); | |
783 | return result; | |
784 | } | |
785 | prio_queue_put(&queue, one); | |
786 | ||
6a938648 JH |
787 | for (i = 0; i < n; i++) { |
788 | twos[i]->object.flags |= PARENT2; | |
73f43f22 | 789 | prio_queue_put(&queue, twos[i]); |
6a938648 | 790 | } |
7c6f8aaf | 791 | |
73f43f22 JK |
792 | while (queue_has_nonstale(&queue)) { |
793 | struct commit *commit = prio_queue_get(&queue); | |
7c6f8aaf | 794 | struct commit_list *parents; |
f3249438 | 795 | int flags; |
7c6f8aaf | 796 | |
f3249438 JH |
797 | flags = commit->object.flags & (PARENT1 | PARENT2 | STALE); |
798 | if (flags == (PARENT1 | PARENT2)) { | |
799 | if (!(commit->object.flags & RESULT)) { | |
800 | commit->object.flags |= RESULT; | |
47e44ed1 | 801 | commit_list_insert_by_date(commit, &result); |
f3249438 | 802 | } |
542ccefe JH |
803 | /* Mark parents of a found merge stale */ |
804 | flags |= STALE; | |
7c6f8aaf JS |
805 | } |
806 | parents = commit->parents; | |
807 | while (parents) { | |
808 | struct commit *p = parents->item; | |
809 | parents = parents->next; | |
810 | if ((p->object.flags & flags) == flags) | |
811 | continue; | |
172947e6 MK |
812 | if (parse_commit(p)) |
813 | return NULL; | |
7c6f8aaf | 814 | p->object.flags |= flags; |
73f43f22 | 815 | prio_queue_put(&queue, p); |
7c6f8aaf JS |
816 | } |
817 | } | |
818 | ||
73f43f22 | 819 | clear_prio_queue(&queue); |
da1f5156 JH |
820 | return result; |
821 | } | |
822 | ||
823 | static struct commit_list *merge_bases_many(struct commit *one, int n, struct commit **twos) | |
824 | { | |
825 | struct commit_list *list = NULL; | |
826 | struct commit_list *result = NULL; | |
827 | int i; | |
828 | ||
829 | for (i = 0; i < n; i++) { | |
830 | if (one == twos[i]) | |
831 | /* | |
832 | * We do not mark this even with RESULT so we do not | |
833 | * have to clean it up. | |
834 | */ | |
835 | return commit_list_insert(one, &result); | |
836 | } | |
837 | ||
838 | if (parse_commit(one)) | |
839 | return NULL; | |
840 | for (i = 0; i < n; i++) { | |
841 | if (parse_commit(twos[i])) | |
842 | return NULL; | |
843 | } | |
844 | ||
845 | list = paint_down_to_common(one, n, twos); | |
846 | ||
f3249438 | 847 | while (list) { |
e510ab89 RS |
848 | struct commit *commit = pop_commit(&list); |
849 | if (!(commit->object.flags & STALE)) | |
850 | commit_list_insert_by_date(commit, &result); | |
f3249438 JH |
851 | } |
852 | return result; | |
853 | } | |
7c6f8aaf | 854 | |
5240c9d7 MV |
855 | struct commit_list *get_octopus_merge_bases(struct commit_list *in) |
856 | { | |
857 | struct commit_list *i, *j, *k, *ret = NULL; | |
5240c9d7 | 858 | |
6bc76725 VM |
859 | if (!in) |
860 | return ret; | |
861 | ||
862 | commit_list_insert(in->item, &ret); | |
863 | ||
864 | for (i = in->next; i; i = i->next) { | |
258c03eb | 865 | struct commit_list *new_commits = NULL, *end = NULL; |
6bc76725 VM |
866 | |
867 | for (j = ret; j; j = j->next) { | |
868 | struct commit_list *bases; | |
2ce406cc | 869 | bases = get_merge_bases(i->item, j->item); |
258c03eb BW |
870 | if (!new_commits) |
871 | new_commits = bases; | |
6bc76725 VM |
872 | else |
873 | end->next = bases; | |
874 | for (k = bases; k; k = k->next) | |
875 | end = k; | |
5240c9d7 | 876 | } |
258c03eb | 877 | ret = new_commits; |
5240c9d7 MV |
878 | } |
879 | return ret; | |
880 | } | |
881 | ||
94f0ced0 JH |
882 | static int remove_redundant(struct commit **array, int cnt) |
883 | { | |
884 | /* | |
885 | * Some commit in the array may be an ancestor of | |
886 | * another commit. Move such commit to the end of | |
887 | * the array, and return the number of commits that | |
888 | * are independent from each other. | |
889 | */ | |
890 | struct commit **work; | |
891 | unsigned char *redundant; | |
892 | int *filled_index; | |
893 | int i, j, filled; | |
894 | ||
895 | work = xcalloc(cnt, sizeof(*work)); | |
896 | redundant = xcalloc(cnt, 1); | |
b32fa95f | 897 | ALLOC_ARRAY(filled_index, cnt - 1); |
94f0ced0 | 898 | |
d866924a JH |
899 | for (i = 0; i < cnt; i++) |
900 | parse_commit(array[i]); | |
94f0ced0 JH |
901 | for (i = 0; i < cnt; i++) { |
902 | struct commit_list *common; | |
903 | ||
904 | if (redundant[i]) | |
905 | continue; | |
906 | for (j = filled = 0; j < cnt; j++) { | |
907 | if (i == j || redundant[j]) | |
908 | continue; | |
909 | filled_index[filled] = j; | |
910 | work[filled++] = array[j]; | |
911 | } | |
912 | common = paint_down_to_common(array[i], filled, work); | |
913 | if (array[i]->object.flags & PARENT2) | |
914 | redundant[i] = 1; | |
915 | for (j = 0; j < filled; j++) | |
916 | if (work[j]->object.flags & PARENT1) | |
917 | redundant[filled_index[j]] = 1; | |
918 | clear_commit_marks(array[i], all_flags); | |
abc03512 | 919 | clear_commit_marks_many(filled, work, all_flags); |
94f0ced0 JH |
920 | free_commit_list(common); |
921 | } | |
922 | ||
923 | /* Now collect the result */ | |
45ccef87 | 924 | COPY_ARRAY(work, array, cnt); |
94f0ced0 JH |
925 | for (i = filled = 0; i < cnt; i++) |
926 | if (!redundant[i]) | |
927 | array[filled++] = work[i]; | |
928 | for (j = filled, i = 0; i < cnt; i++) | |
929 | if (redundant[i]) | |
930 | array[j++] = work[i]; | |
931 | free(work); | |
932 | free(redundant); | |
933 | free(filled_index); | |
934 | return filled; | |
935 | } | |
936 | ||
2ce406cc JH |
937 | static struct commit_list *get_merge_bases_many_0(struct commit *one, |
938 | int n, | |
939 | struct commit **twos, | |
940 | int cleanup) | |
f3249438 | 941 | { |
f3249438 JH |
942 | struct commit_list *list; |
943 | struct commit **rslt; | |
944 | struct commit_list *result; | |
94f0ced0 | 945 | int cnt, i; |
f3249438 | 946 | |
6a938648 JH |
947 | result = merge_bases_many(one, n, twos); |
948 | for (i = 0; i < n; i++) { | |
949 | if (one == twos[i]) | |
950 | return result; | |
951 | } | |
f3249438 JH |
952 | if (!result || !result->next) { |
953 | if (cleanup) { | |
954 | clear_commit_marks(one, all_flags); | |
e895cb51 | 955 | clear_commit_marks_many(n, twos, all_flags); |
7c6f8aaf | 956 | } |
f3249438 | 957 | return result; |
7c6f8aaf JS |
958 | } |
959 | ||
f3249438 | 960 | /* There are more than one */ |
4bbaa1eb | 961 | cnt = commit_list_count(result); |
f3249438 JH |
962 | rslt = xcalloc(cnt, sizeof(*rslt)); |
963 | for (list = result, i = 0; list; list = list->next) | |
964 | rslt[i++] = list->item; | |
965 | free_commit_list(result); | |
966 | ||
967 | clear_commit_marks(one, all_flags); | |
e895cb51 | 968 | clear_commit_marks_many(n, twos, all_flags); |
7c6f8aaf | 969 | |
94f0ced0 | 970 | cnt = remove_redundant(rslt, cnt); |
f3249438 | 971 | result = NULL; |
94f0ced0 JH |
972 | for (i = 0; i < cnt; i++) |
973 | commit_list_insert_by_date(rslt[i], &result); | |
f3249438 | 974 | free(rslt); |
7c6f8aaf JS |
975 | return result; |
976 | } | |
2ecd2bbc | 977 | |
2ce406cc JH |
978 | struct commit_list *get_merge_bases_many(struct commit *one, |
979 | int n, | |
980 | struct commit **twos) | |
981 | { | |
982 | return get_merge_bases_many_0(one, n, twos, 1); | |
983 | } | |
984 | ||
985 | struct commit_list *get_merge_bases_many_dirty(struct commit *one, | |
986 | int n, | |
987 | struct commit **twos) | |
988 | { | |
989 | return get_merge_bases_many_0(one, n, twos, 0); | |
990 | } | |
991 | ||
992 | struct commit_list *get_merge_bases(struct commit *one, struct commit *two) | |
6a938648 | 993 | { |
2ce406cc | 994 | return get_merge_bases_many_0(one, 1, &two, 1); |
6a938648 JH |
995 | } |
996 | ||
a20efee9 | 997 | /* |
41ccfdd9 | 998 | * Is "commit" a descendant of one of the elements on the "with_commit" list? |
a20efee9 | 999 | */ |
7fcdb36e JG |
1000 | int is_descendant_of(struct commit *commit, struct commit_list *with_commit) |
1001 | { | |
1002 | if (!with_commit) | |
1003 | return 1; | |
1004 | while (with_commit) { | |
1005 | struct commit *other; | |
1006 | ||
1007 | other = with_commit->item; | |
1008 | with_commit = with_commit->next; | |
a20efee9 | 1009 | if (in_merge_bases(other, commit)) |
7fcdb36e JG |
1010 | return 1; |
1011 | } | |
1012 | return 0; | |
1013 | } | |
1014 | ||
a20efee9 | 1015 | /* |
4c4b27e8 | 1016 | * Is "commit" an ancestor of one of the "references"? |
a20efee9 | 1017 | */ |
4c4b27e8 | 1018 | int in_merge_bases_many(struct commit *commit, int nr_reference, struct commit **reference) |
2ecd2bbc | 1019 | { |
6440fdba | 1020 | struct commit_list *bases; |
4c4b27e8 | 1021 | int ret = 0, i; |
2ecd2bbc | 1022 | |
4c4b27e8 | 1023 | if (parse_commit(commit)) |
6440fdba | 1024 | return ret; |
4c4b27e8 JH |
1025 | for (i = 0; i < nr_reference; i++) |
1026 | if (parse_commit(reference[i])) | |
1027 | return ret; | |
2ecd2bbc | 1028 | |
4c4b27e8 | 1029 | bases = paint_down_to_common(commit, nr_reference, reference); |
6440fdba JH |
1030 | if (commit->object.flags & PARENT2) |
1031 | ret = 1; | |
b0f9e9ee | 1032 | clear_commit_marks(commit, all_flags); |
557899ff | 1033 | clear_commit_marks_many(nr_reference, reference, all_flags); |
2ecd2bbc JH |
1034 | free_commit_list(bases); |
1035 | return ret; | |
1036 | } | |
98cf9c3b | 1037 | |
4c4b27e8 JH |
1038 | /* |
1039 | * Is "commit" an ancestor of (i.e. reachable from) the "reference"? | |
1040 | */ | |
1041 | int in_merge_bases(struct commit *commit, struct commit *reference) | |
1042 | { | |
1043 | return in_merge_bases_many(commit, 1, &reference); | |
1044 | } | |
1045 | ||
98cf9c3b JH |
1046 | struct commit_list *reduce_heads(struct commit_list *heads) |
1047 | { | |
1048 | struct commit_list *p; | |
1049 | struct commit_list *result = NULL, **tail = &result; | |
f37d3c75 JH |
1050 | struct commit **array; |
1051 | int num_head, i; | |
98cf9c3b JH |
1052 | |
1053 | if (!heads) | |
1054 | return NULL; | |
1055 | ||
f37d3c75 JH |
1056 | /* Uniquify */ |
1057 | for (p = heads; p; p = p->next) | |
1058 | p->item->object.flags &= ~STALE; | |
1059 | for (p = heads, num_head = 0; p; p = p->next) { | |
1060 | if (p->item->object.flags & STALE) | |
711f6b29 | 1061 | continue; |
f37d3c75 JH |
1062 | p->item->object.flags |= STALE; |
1063 | num_head++; | |
1064 | } | |
c4a7b009 | 1065 | array = xcalloc(num_head, sizeof(*array)); |
f37d3c75 JH |
1066 | for (p = heads, i = 0; p; p = p->next) { |
1067 | if (p->item->object.flags & STALE) { | |
1068 | array[i++] = p->item; | |
1069 | p->item->object.flags &= ~STALE; | |
98cf9c3b | 1070 | } |
98cf9c3b | 1071 | } |
f37d3c75 JH |
1072 | num_head = remove_redundant(array, num_head); |
1073 | for (i = 0; i < num_head; i++) | |
1074 | tail = &commit_list_insert(array[i], tail)->next; | |
cb7b29eb | 1075 | free(array); |
98cf9c3b JH |
1076 | return result; |
1077 | } | |
40d52ff7 | 1078 | |
4da72644 MÅ |
1079 | void reduce_heads_replace(struct commit_list **heads) |
1080 | { | |
1081 | struct commit_list *result = reduce_heads(*heads); | |
1082 | free_commit_list(*heads); | |
1083 | *heads = result; | |
1084 | } | |
1085 | ||
ba3c69a9 JH |
1086 | static const char gpg_sig_header[] = "gpgsig"; |
1087 | static const int gpg_sig_header_len = sizeof(gpg_sig_header) - 1; | |
1088 | ||
1089 | static int do_sign_commit(struct strbuf *buf, const char *keyid) | |
1090 | { | |
1091 | struct strbuf sig = STRBUF_INIT; | |
1092 | int inspos, copypos; | |
3324dd8f | 1093 | const char *eoh; |
ba3c69a9 JH |
1094 | |
1095 | /* find the end of the header */ | |
3324dd8f JS |
1096 | eoh = strstr(buf->buf, "\n\n"); |
1097 | if (!eoh) | |
1098 | inspos = buf->len; | |
1099 | else | |
1100 | inspos = eoh - buf->buf + 1; | |
ba3c69a9 JH |
1101 | |
1102 | if (!keyid || !*keyid) | |
1103 | keyid = get_signing_key(); | |
1104 | if (sign_buffer(buf, &sig, keyid)) { | |
1105 | strbuf_release(&sig); | |
1106 | return -1; | |
1107 | } | |
1108 | ||
1109 | for (copypos = 0; sig.buf[copypos]; ) { | |
1110 | const char *bol = sig.buf + copypos; | |
1111 | const char *eol = strchrnul(bol, '\n'); | |
1112 | int len = (eol - bol) + !!*eol; | |
1113 | ||
1114 | if (!copypos) { | |
1115 | strbuf_insert(buf, inspos, gpg_sig_header, gpg_sig_header_len); | |
1116 | inspos += gpg_sig_header_len; | |
1117 | } | |
1118 | strbuf_insert(buf, inspos++, " ", 1); | |
1119 | strbuf_insert(buf, inspos, bol, len); | |
1120 | inspos += len; | |
1121 | copypos += len; | |
1122 | } | |
1123 | strbuf_release(&sig); | |
1124 | return 0; | |
1125 | } | |
1126 | ||
218aa3a6 | 1127 | int parse_signed_commit(const struct commit *commit, |
0c37f1fc JH |
1128 | struct strbuf *payload, struct strbuf *signature) |
1129 | { | |
218aa3a6 | 1130 | |
0c37f1fc | 1131 | unsigned long size; |
218aa3a6 | 1132 | const char *buffer = get_commit_buffer(commit, &size); |
0c37f1fc | 1133 | int in_signature, saw_signature = -1; |
218aa3a6 | 1134 | const char *line, *tail; |
0c37f1fc JH |
1135 | |
1136 | line = buffer; | |
1137 | tail = buffer + size; | |
1138 | in_signature = 0; | |
1139 | saw_signature = 0; | |
1140 | while (line < tail) { | |
1141 | const char *sig = NULL; | |
218aa3a6 | 1142 | const char *next = memchr(line, '\n', tail - line); |
0c37f1fc JH |
1143 | |
1144 | next = next ? next + 1 : tail; | |
1145 | if (in_signature && line[0] == ' ') | |
1146 | sig = line + 1; | |
59556548 | 1147 | else if (starts_with(line, gpg_sig_header) && |
0c37f1fc JH |
1148 | line[gpg_sig_header_len] == ' ') |
1149 | sig = line + gpg_sig_header_len + 1; | |
1150 | if (sig) { | |
1151 | strbuf_add(signature, sig, next - sig); | |
1152 | saw_signature = 1; | |
1153 | in_signature = 1; | |
1154 | } else { | |
1155 | if (*line == '\n') | |
1156 | /* dump the whole remainder of the buffer */ | |
1157 | next = tail; | |
1158 | strbuf_add(payload, line, next - line); | |
1159 | in_signature = 0; | |
1160 | } | |
1161 | line = next; | |
1162 | } | |
218aa3a6 | 1163 | unuse_commit_buffer(commit, buffer); |
0c37f1fc JH |
1164 | return saw_signature; |
1165 | } | |
1166 | ||
0b05ab6f CC |
1167 | int remove_signature(struct strbuf *buf) |
1168 | { | |
1169 | const char *line = buf->buf; | |
1170 | const char *tail = buf->buf + buf->len; | |
1171 | int in_signature = 0; | |
1172 | const char *sig_start = NULL; | |
1173 | const char *sig_end = NULL; | |
1174 | ||
1175 | while (line < tail) { | |
1176 | const char *next = memchr(line, '\n', tail - line); | |
1177 | next = next ? next + 1 : tail; | |
1178 | ||
1179 | if (in_signature && line[0] == ' ') | |
1180 | sig_end = next; | |
1181 | else if (starts_with(line, gpg_sig_header) && | |
1182 | line[gpg_sig_header_len] == ' ') { | |
1183 | sig_start = line; | |
1184 | sig_end = next; | |
1185 | in_signature = 1; | |
1186 | } else { | |
1187 | if (*line == '\n') | |
1188 | /* dump the whole remainder of the buffer */ | |
1189 | next = tail; | |
1190 | in_signature = 0; | |
1191 | } | |
1192 | line = next; | |
1193 | } | |
1194 | ||
1195 | if (sig_start) | |
1196 | strbuf_remove(buf, sig_start - buf->buf, sig_end - sig_start); | |
1197 | ||
1198 | return sig_start != NULL; | |
1199 | } | |
1200 | ||
5231c633 JH |
1201 | static void handle_signed_tag(struct commit *parent, struct commit_extra_header ***tail) |
1202 | { | |
1203 | struct merge_remote_desc *desc; | |
1204 | struct commit_extra_header *mergetag; | |
1205 | char *buf; | |
1206 | unsigned long size, len; | |
1207 | enum object_type type; | |
1208 | ||
1209 | desc = merge_remote_util(parent); | |
1210 | if (!desc || !desc->obj) | |
1211 | return; | |
b4f5aca4 | 1212 | buf = read_object_file(&desc->obj->oid, &type, &size); |
5231c633 JH |
1213 | if (!buf || type != OBJ_TAG) |
1214 | goto free_return; | |
1215 | len = parse_signature(buf, size); | |
1216 | if (size == len) | |
1217 | goto free_return; | |
1218 | /* | |
1219 | * We could verify this signature and either omit the tag when | |
1220 | * it does not validate, but the integrator may not have the | |
1221 | * public key of the signer of the tag he is merging, while a | |
1222 | * later auditor may have it while auditing, so let's not run | |
1223 | * verify-signed-buffer here for now... | |
1224 | * | |
1225 | * if (verify_signed_buffer(buf, len, buf + len, size - len, ...)) | |
1226 | * warn("warning: signed tag unverified."); | |
1227 | */ | |
1228 | mergetag = xcalloc(1, sizeof(*mergetag)); | |
1229 | mergetag->key = xstrdup("mergetag"); | |
1230 | mergetag->value = buf; | |
1231 | mergetag->len = size; | |
1232 | ||
1233 | **tail = mergetag; | |
1234 | *tail = &mergetag->next; | |
1235 | return; | |
1236 | ||
1237 | free_return: | |
1238 | free(buf); | |
1239 | } | |
1240 | ||
434060ec | 1241 | int check_commit_signature(const struct commit *commit, struct signature_check *sigc) |
ffb6d7d5 SG |
1242 | { |
1243 | struct strbuf payload = STRBUF_INIT; | |
1244 | struct strbuf signature = STRBUF_INIT; | |
434060ec | 1245 | int ret = 1; |
ffb6d7d5 SG |
1246 | |
1247 | sigc->result = 'N'; | |
1248 | ||
218aa3a6 | 1249 | if (parse_signed_commit(commit, &payload, &signature) <= 0) |
ffb6d7d5 | 1250 | goto out; |
434060ec | 1251 | ret = check_signature(payload.buf, payload.len, signature.buf, |
1252 | signature.len, sigc); | |
ffb6d7d5 SG |
1253 | |
1254 | out: | |
ffb6d7d5 SG |
1255 | strbuf_release(&payload); |
1256 | strbuf_release(&signature); | |
434060ec | 1257 | |
1258 | return ret; | |
ffb6d7d5 SG |
1259 | } |
1260 | ||
1261 | ||
1262 | ||
5231c633 JH |
1263 | void append_merge_tag_headers(struct commit_list *parents, |
1264 | struct commit_extra_header ***tail) | |
1265 | { | |
1266 | while (parents) { | |
1267 | struct commit *parent = parents->item; | |
1268 | handle_signed_tag(parent, tail); | |
1269 | parents = parents->next; | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | static void add_extra_header(struct strbuf *buffer, | |
1274 | struct commit_extra_header *extra) | |
1275 | { | |
1276 | strbuf_addstr(buffer, extra->key); | |
ed7a42a0 JH |
1277 | if (extra->len) |
1278 | strbuf_add_lines(buffer, " ", extra->value, extra->len); | |
1279 | else | |
1280 | strbuf_addch(buffer, '\n'); | |
1281 | } | |
1282 | ||
c871a1d1 JH |
1283 | struct commit_extra_header *read_commit_extra_headers(struct commit *commit, |
1284 | const char **exclude) | |
ed7a42a0 JH |
1285 | { |
1286 | struct commit_extra_header *extra = NULL; | |
1287 | unsigned long size; | |
218aa3a6 JK |
1288 | const char *buffer = get_commit_buffer(commit, &size); |
1289 | extra = read_commit_extra_header_lines(buffer, size, exclude); | |
1290 | unuse_commit_buffer(commit, buffer); | |
ed7a42a0 JH |
1291 | return extra; |
1292 | } | |
1293 | ||
063da62b CC |
1294 | void for_each_mergetag(each_mergetag_fn fn, struct commit *commit, void *data) |
1295 | { | |
1296 | struct commit_extra_header *extra, *to_free; | |
1297 | ||
1298 | to_free = read_commit_extra_headers(commit, NULL); | |
1299 | for (extra = to_free; extra; extra = extra->next) { | |
1300 | if (strcmp(extra->key, "mergetag")) | |
1301 | continue; /* not a merge tag */ | |
1302 | fn(commit, extra, data); | |
1303 | } | |
1304 | free_commit_extra_headers(to_free); | |
1305 | } | |
1306 | ||
ed7a42a0 JH |
1307 | static inline int standard_header_field(const char *field, size_t len) |
1308 | { | |
b072504c RS |
1309 | return ((len == 4 && !memcmp(field, "tree", 4)) || |
1310 | (len == 6 && !memcmp(field, "parent", 6)) || | |
1311 | (len == 6 && !memcmp(field, "author", 6)) || | |
1312 | (len == 9 && !memcmp(field, "committer", 9)) || | |
1313 | (len == 8 && !memcmp(field, "encoding", 8))); | |
ed7a42a0 JH |
1314 | } |
1315 | ||
c871a1d1 JH |
1316 | static int excluded_header_field(const char *field, size_t len, const char **exclude) |
1317 | { | |
1318 | if (!exclude) | |
1319 | return 0; | |
1320 | ||
1321 | while (*exclude) { | |
1322 | size_t xlen = strlen(*exclude); | |
b072504c | 1323 | if (len == xlen && !memcmp(field, *exclude, xlen)) |
c871a1d1 JH |
1324 | return 1; |
1325 | exclude++; | |
1326 | } | |
1327 | return 0; | |
1328 | } | |
1329 | ||
82a75299 JH |
1330 | static struct commit_extra_header *read_commit_extra_header_lines( |
1331 | const char *buffer, size_t size, | |
1332 | const char **exclude) | |
ed7a42a0 JH |
1333 | { |
1334 | struct commit_extra_header *extra = NULL, **tail = &extra, *it = NULL; | |
1335 | const char *line, *next, *eof, *eob; | |
1336 | struct strbuf buf = STRBUF_INIT; | |
1337 | ||
1338 | for (line = buffer, eob = line + size; | |
1339 | line < eob && *line != '\n'; | |
1340 | line = next) { | |
1341 | next = memchr(line, '\n', eob - line); | |
1342 | next = next ? next + 1 : eob; | |
1343 | if (*line == ' ') { | |
1344 | /* continuation */ | |
1345 | if (it) | |
1346 | strbuf_add(&buf, line + 1, next - (line + 1)); | |
1347 | continue; | |
1348 | } | |
1349 | if (it) | |
1350 | it->value = strbuf_detach(&buf, &it->len); | |
1351 | strbuf_reset(&buf); | |
1352 | it = NULL; | |
1353 | ||
50a01cc4 RS |
1354 | eof = memchr(line, ' ', next - line); |
1355 | if (!eof) | |
ed7a42a0 | 1356 | eof = next; |
b072504c RS |
1357 | else if (standard_header_field(line, eof - line) || |
1358 | excluded_header_field(line, eof - line, exclude)) | |
ed7a42a0 JH |
1359 | continue; |
1360 | ||
1361 | it = xcalloc(1, sizeof(*it)); | |
1362 | it->key = xmemdupz(line, eof-line); | |
1363 | *tail = it; | |
1364 | tail = &it->next; | |
1365 | if (eof + 1 < next) | |
1366 | strbuf_add(&buf, eof + 1, next - (eof + 1)); | |
1367 | } | |
1368 | if (it) | |
1369 | it->value = strbuf_detach(&buf, &it->len); | |
1370 | return extra; | |
5231c633 JH |
1371 | } |
1372 | ||
1373 | void free_commit_extra_headers(struct commit_extra_header *extra) | |
1374 | { | |
1375 | while (extra) { | |
1376 | struct commit_extra_header *next = extra->next; | |
1377 | free(extra->key); | |
1378 | free(extra->value); | |
1379 | free(extra); | |
1380 | extra = next; | |
1381 | } | |
1382 | } | |
1383 | ||
5078f344 PO |
1384 | int commit_tree(const char *msg, size_t msg_len, const struct object_id *tree, |
1385 | struct commit_list *parents, struct object_id *ret, | |
ba3c69a9 | 1386 | const char *author, const char *sign_commit) |
5231c633 JH |
1387 | { |
1388 | struct commit_extra_header *extra = NULL, **tail = &extra; | |
1389 | int result; | |
1390 | ||
1391 | append_merge_tag_headers(parents, &tail); | |
3ffefb54 | 1392 | result = commit_tree_extended(msg, msg_len, tree, parents, ret, |
ba3c69a9 | 1393 | author, sign_commit, extra); |
5231c633 JH |
1394 | free_commit_extra_headers(extra); |
1395 | return result; | |
1396 | } | |
1397 | ||
08a94a14 LT |
1398 | static int find_invalid_utf8(const char *buf, int len) |
1399 | { | |
1400 | int offset = 0; | |
e82bd6cc | 1401 | static const unsigned int max_codepoint[] = { |
1402 | 0x7f, 0x7ff, 0xffff, 0x10ffff | |
1403 | }; | |
08a94a14 LT |
1404 | |
1405 | while (len) { | |
1406 | unsigned char c = *buf++; | |
1407 | int bytes, bad_offset; | |
28110d4b | 1408 | unsigned int codepoint; |
e82bd6cc | 1409 | unsigned int min_val, max_val; |
08a94a14 LT |
1410 | |
1411 | len--; | |
1412 | offset++; | |
1413 | ||
1414 | /* Simple US-ASCII? No worries. */ | |
1415 | if (c < 0x80) | |
1416 | continue; | |
1417 | ||
1418 | bad_offset = offset-1; | |
1419 | ||
1420 | /* | |
1421 | * Count how many more high bits set: that's how | |
1422 | * many more bytes this sequence should have. | |
1423 | */ | |
1424 | bytes = 0; | |
1425 | while (c & 0x40) { | |
1426 | c <<= 1; | |
1427 | bytes++; | |
1428 | } | |
1429 | ||
28110d4b | 1430 | /* |
1431 | * Must be between 1 and 3 more bytes. Longer sequences result in | |
1432 | * codepoints beyond U+10FFFF, which are guaranteed never to exist. | |
1433 | */ | |
1434 | if (bytes < 1 || 3 < bytes) | |
08a94a14 LT |
1435 | return bad_offset; |
1436 | ||
1437 | /* Do we *have* that many bytes? */ | |
1438 | if (len < bytes) | |
1439 | return bad_offset; | |
1440 | ||
e82bd6cc | 1441 | /* |
1442 | * Place the encoded bits at the bottom of the value and compute the | |
1443 | * valid range. | |
1444 | */ | |
28110d4b | 1445 | codepoint = (c & 0x7f) >> bytes; |
e82bd6cc | 1446 | min_val = max_codepoint[bytes-1] + 1; |
1447 | max_val = max_codepoint[bytes]; | |
28110d4b | 1448 | |
08a94a14 LT |
1449 | offset += bytes; |
1450 | len -= bytes; | |
1451 | ||
1452 | /* And verify that they are good continuation bytes */ | |
1453 | do { | |
28110d4b | 1454 | codepoint <<= 6; |
1455 | codepoint |= *buf & 0x3f; | |
08a94a14 LT |
1456 | if ((*buf++ & 0xc0) != 0x80) |
1457 | return bad_offset; | |
1458 | } while (--bytes); | |
1459 | ||
e82bd6cc | 1460 | /* Reject codepoints that are out of range for the sequence length. */ |
1461 | if (codepoint < min_val || codepoint > max_val) | |
28110d4b | 1462 | return bad_offset; |
1463 | /* Surrogates are only for UTF-16 and cannot be encoded in UTF-8. */ | |
1464 | if ((codepoint & 0x1ff800) == 0xd800) | |
1465 | return bad_offset; | |
81050ac6 | 1466 | /* U+xxFFFE and U+xxFFFF are guaranteed non-characters. */ |
dc773a67 | 1467 | if ((codepoint & 0xfffe) == 0xfffe) |
81050ac6 PK |
1468 | return bad_offset; |
1469 | /* So are anything in the range U+FDD0..U+FDEF. */ | |
1470 | if (codepoint >= 0xfdd0 && codepoint <= 0xfdef) | |
28110d4b | 1471 | return bad_offset; |
08a94a14 LT |
1472 | } |
1473 | return -1; | |
1474 | } | |
1475 | ||
1476 | /* | |
1477 | * This verifies that the buffer is in proper utf8 format. | |
1478 | * | |
1479 | * If it isn't, it assumes any non-utf8 characters are Latin1, | |
1480 | * and does the conversion. | |
08a94a14 LT |
1481 | */ |
1482 | static int verify_utf8(struct strbuf *buf) | |
1483 | { | |
1484 | int ok = 1; | |
1485 | long pos = 0; | |
1486 | ||
1487 | for (;;) { | |
1488 | int bad; | |
1489 | unsigned char c; | |
1490 | unsigned char replace[2]; | |
1491 | ||
1492 | bad = find_invalid_utf8(buf->buf + pos, buf->len - pos); | |
1493 | if (bad < 0) | |
1494 | return ok; | |
1495 | pos += bad; | |
1496 | ok = 0; | |
1497 | c = buf->buf[pos]; | |
1498 | strbuf_remove(buf, pos, 1); | |
1499 | ||
1500 | /* We know 'c' must be in the range 128-255 */ | |
1501 | replace[0] = 0xc0 + (c >> 6); | |
1502 | replace[1] = 0x80 + (c & 0x3f); | |
1503 | strbuf_insert(buf, pos, replace, 2); | |
1504 | pos += 2; | |
1505 | } | |
1506 | } | |
1507 | ||
40d52ff7 | 1508 | static const char commit_utf8_warn[] = |
4fa4b315 VA |
1509 | N_("Warning: commit message did not conform to UTF-8.\n" |
1510 | "You may want to amend it after fixing the message, or set the config\n" | |
1511 | "variable i18n.commitencoding to the encoding your project uses.\n"); | |
40d52ff7 | 1512 | |
3ffefb54 | 1513 | int commit_tree_extended(const char *msg, size_t msg_len, |
5078f344 PO |
1514 | const struct object_id *tree, |
1515 | struct commit_list *parents, struct object_id *ret, | |
ba3c69a9 JH |
1516 | const char *author, const char *sign_commit, |
1517 | struct commit_extra_header *extra) | |
40d52ff7 JK |
1518 | { |
1519 | int result; | |
1520 | int encoding_is_utf8; | |
1521 | struct strbuf buffer; | |
1522 | ||
e816caa0 | 1523 | assert_oid_type(tree, OBJ_TREE); |
40d52ff7 | 1524 | |
3ffefb54 | 1525 | if (memchr(msg, '\0', msg_len)) |
37576c14 NTND |
1526 | return error("a NUL byte in commit log message not allowed."); |
1527 | ||
40d52ff7 JK |
1528 | /* Not having i18n.commitencoding is the same as having utf-8 */ |
1529 | encoding_is_utf8 = is_encoding_utf8(git_commit_encoding); | |
1530 | ||
1531 | strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */ | |
5078f344 | 1532 | strbuf_addf(&buffer, "tree %s\n", oid_to_hex(tree)); |
40d52ff7 JK |
1533 | |
1534 | /* | |
1535 | * NOTE! This ordering means that the same exact tree merged with a | |
1536 | * different order of parents will be a _different_ changeset even | |
1537 | * if everything else stays the same. | |
1538 | */ | |
1539 | while (parents) { | |
e510ab89 | 1540 | struct commit *parent = pop_commit(&parents); |
40d52ff7 | 1541 | strbuf_addf(&buffer, "parent %s\n", |
f2fd0760 | 1542 | oid_to_hex(&parent->object.oid)); |
40d52ff7 JK |
1543 | } |
1544 | ||
1545 | /* Person/date information */ | |
1546 | if (!author) | |
f9bc573f | 1547 | author = git_author_info(IDENT_STRICT); |
40d52ff7 | 1548 | strbuf_addf(&buffer, "author %s\n", author); |
f9bc573f | 1549 | strbuf_addf(&buffer, "committer %s\n", git_committer_info(IDENT_STRICT)); |
40d52ff7 JK |
1550 | if (!encoding_is_utf8) |
1551 | strbuf_addf(&buffer, "encoding %s\n", git_commit_encoding); | |
5231c633 JH |
1552 | |
1553 | while (extra) { | |
1554 | add_extra_header(&buffer, extra); | |
1555 | extra = extra->next; | |
1556 | } | |
40d52ff7 JK |
1557 | strbuf_addch(&buffer, '\n'); |
1558 | ||
1559 | /* And add the comment */ | |
3ffefb54 | 1560 | strbuf_add(&buffer, msg, msg_len); |
40d52ff7 JK |
1561 | |
1562 | /* And check the encoding */ | |
08a94a14 | 1563 | if (encoding_is_utf8 && !verify_utf8(&buffer)) |
4fa4b315 | 1564 | fprintf(stderr, _(commit_utf8_warn)); |
40d52ff7 | 1565 | |
e505146d RS |
1566 | if (sign_commit && do_sign_commit(&buffer, sign_commit)) { |
1567 | result = -1; | |
1568 | goto out; | |
1569 | } | |
ba3c69a9 | 1570 | |
a09c985e | 1571 | result = write_object_file(buffer.buf, buffer.len, commit_type, ret); |
e505146d | 1572 | out: |
40d52ff7 JK |
1573 | strbuf_release(&buffer); |
1574 | return result; | |
1575 | } | |
ae8e4c9c | 1576 | |
beb518c9 RS |
1577 | void set_merge_remote_desc(struct commit *commit, |
1578 | const char *name, struct object *obj) | |
1579 | { | |
1580 | struct merge_remote_desc *desc; | |
5447a76a | 1581 | FLEX_ALLOC_STR(desc, name, name); |
beb518c9 | 1582 | desc->obj = obj; |
beb518c9 RS |
1583 | commit->util = desc; |
1584 | } | |
1585 | ||
ae8e4c9c JH |
1586 | struct commit *get_merge_parent(const char *name) |
1587 | { | |
1588 | struct object *obj; | |
1589 | struct commit *commit; | |
7683e2e6 | 1590 | struct object_id oid; |
e82caf38 | 1591 | if (get_oid(name, &oid)) |
ae8e4c9c | 1592 | return NULL; |
c251c83d | 1593 | obj = parse_object(&oid); |
ae8e4c9c | 1594 | commit = (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT); |
beb518c9 RS |
1595 | if (commit && !commit->util) |
1596 | set_merge_remote_desc(commit, name, obj); | |
ae8e4c9c JH |
1597 | return commit; |
1598 | } | |
89b5f1d9 RS |
1599 | |
1600 | /* | |
1601 | * Append a commit to the end of the commit_list. | |
1602 | * | |
1603 | * next starts by pointing to the variable that holds the head of an | |
1604 | * empty commit_list, and is updated to point to the "next" field of | |
1605 | * the last item on the list as new commits are appended. | |
1606 | * | |
1607 | * Usage example: | |
1608 | * | |
1609 | * struct commit_list *list; | |
1610 | * struct commit_list **next = &list; | |
1611 | * | |
1612 | * next = commit_list_append(c1, next); | |
1613 | * next = commit_list_append(c2, next); | |
1614 | * assert(commit_list_count(list) == 2); | |
1615 | * return list; | |
1616 | */ | |
1617 | struct commit_list **commit_list_append(struct commit *commit, | |
1618 | struct commit_list **next) | |
1619 | { | |
258c03eb BW |
1620 | struct commit_list *new_commit = xmalloc(sizeof(struct commit_list)); |
1621 | new_commit->item = commit; | |
1622 | *next = new_commit; | |
1623 | new_commit->next = NULL; | |
1624 | return &new_commit->next; | |
89b5f1d9 | 1625 | } |
efc7df45 | 1626 | |
fe6eb7f2 JK |
1627 | const char *find_commit_header(const char *msg, const char *key, size_t *out_len) |
1628 | { | |
1629 | int key_len = strlen(key); | |
1630 | const char *line = msg; | |
1631 | ||
1632 | while (line) { | |
1633 | const char *eol = strchrnul(line, '\n'); | |
1634 | ||
1635 | if (line == eol) | |
1636 | return NULL; | |
1637 | ||
1638 | if (eol - line > key_len && | |
1639 | !strncmp(line, key, key_len) && | |
1640 | line[key_len] == ' ') { | |
1641 | *out_len = eol - line - key_len - 1; | |
1642 | return line + key_len + 1; | |
1643 | } | |
1644 | line = *eol ? eol + 1 : NULL; | |
1645 | } | |
1646 | return NULL; | |
1647 | } | |
0ed8a4e1 | 1648 | |
8c384589 | 1649 | /* |
710714aa | 1650 | * Inspect the given string and determine the true "end" of the log message, in |
8c384589 | 1651 | * order to find where to put a new Signed-off-by: line. Ignored are |
d76650b8 BM |
1652 | * trailing comment lines and blank lines. To support "git commit -s |
1653 | * --amend" on an existing commit, we also ignore "Conflicts:". To | |
1654 | * support "git commit -v", we truncate at cut lines. | |
8c384589 CC |
1655 | * |
1656 | * Returns the number of bytes from the tail to ignore, to be fed as | |
1657 | * the second parameter to append_signoff(). | |
1658 | */ | |
710714aa | 1659 | int ignore_non_trailer(const char *buf, size_t len) |
8c384589 CC |
1660 | { |
1661 | int boc = 0; | |
1662 | int bol = 0; | |
1663 | int in_old_conflicts_block = 0; | |
d76650b8 | 1664 | size_t cutoff = wt_status_locate_end(buf, len); |
8c384589 | 1665 | |
d76650b8 | 1666 | while (bol < cutoff) { |
710714aa | 1667 | const char *next_line = memchr(buf + bol, '\n', len - bol); |
8c384589 | 1668 | |
710714aa JT |
1669 | if (!next_line) |
1670 | next_line = buf + len; | |
8c384589 CC |
1671 | else |
1672 | next_line++; | |
1673 | ||
710714aa | 1674 | if (buf[bol] == comment_line_char || buf[bol] == '\n') { |
8c384589 CC |
1675 | /* is this the first of the run of comments? */ |
1676 | if (!boc) | |
1677 | boc = bol; | |
1678 | /* otherwise, it is just continuing */ | |
710714aa | 1679 | } else if (starts_with(buf + bol, "Conflicts:\n")) { |
8c384589 CC |
1680 | in_old_conflicts_block = 1; |
1681 | if (!boc) | |
1682 | boc = bol; | |
710714aa | 1683 | } else if (in_old_conflicts_block && buf[bol] == '\t') { |
8c384589 CC |
1684 | ; /* a pathname in the conflicts block */ |
1685 | } else if (boc) { | |
1686 | /* the previous was not trailing comment */ | |
1687 | boc = 0; | |
1688 | in_old_conflicts_block = 0; | |
1689 | } | |
710714aa | 1690 | bol = next_line - buf; |
8c384589 | 1691 | } |
d76650b8 | 1692 | return boc ? len - boc : len - cutoff; |
8c384589 | 1693 | } |