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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" |
ed09aef0 | 4 | #include "pkt-line.h" |
52883fbd | 5 | #include "utf8.h" |
199c45bf JH |
6 | #include "diff.h" |
7 | #include "revision.h" | |
a97a7468 | 8 | #include "notes.h" |
ba3c69a9 | 9 | #include "gpg-interface.h" |
46905893 | 10 | #include "mergesort.h" |
a84b794a | 11 | #include "commit-slab.h" |
da24b104 | 12 | #include "prio-queue.h" |
0a9136f3 | 13 | #include "sha1-lookup.h" |
d76650b8 | 14 | #include "wt-status.h" |
175785e5 | 15 | |
82a75299 JH |
16 | static struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **); |
17 | ||
60ab26de LT |
18 | int save_commit_buffer = 1; |
19 | ||
175785e5 DB |
20 | const char *commit_type = "commit"; |
21 | ||
bc83266a | 22 | struct commit *lookup_commit_reference_gently(const struct object_id *oid, |
f76412ed | 23 | int quiet) |
961784ee | 24 | { |
c251c83d | 25 | struct object *obj = deref_tag(parse_object(oid), NULL, 0); |
961784ee LT |
26 | |
27 | if (!obj) | |
28 | return NULL; | |
8ff226a9 | 29 | return object_as_type(obj, OBJ_COMMIT, quiet); |
f76412ed JH |
30 | } |
31 | ||
bc83266a | 32 | struct commit *lookup_commit_reference(const struct object_id *oid) |
f76412ed | 33 | { |
bc83266a | 34 | return lookup_commit_reference_gently(oid, 0); |
961784ee LT |
35 | } |
36 | ||
bc83266a | 37 | struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref_name) |
baf18fc2 | 38 | { |
bc83266a | 39 | struct commit *c = lookup_commit_reference(oid); |
baf18fc2 NTND |
40 | if (!c) |
41 | die(_("could not parse %s"), ref_name); | |
bc83266a | 42 | if (oidcmp(oid, &c->object.oid)) { |
baf18fc2 | 43 | warning(_("%s %s is not a commit!"), |
bc83266a | 44 | ref_name, oid_to_hex(oid)); |
baf18fc2 NTND |
45 | } |
46 | return c; | |
47 | } | |
48 | ||
bc83266a | 49 | struct commit *lookup_commit(const struct object_id *oid) |
175785e5 | 50 | { |
bc83266a | 51 | struct object *obj = lookup_object(oid->hash); |
d36f51c1 | 52 | if (!obj) |
bc83266a | 53 | return create_object(oid->hash, alloc_commit_node()); |
8ff226a9 | 54 | return object_as_type(obj, OBJ_COMMIT, 0); |
175785e5 DB |
55 | } |
56 | ||
a6fa5992 PN |
57 | struct commit *lookup_commit_reference_by_name(const char *name) |
58 | { | |
7683e2e6 | 59 | struct object_id oid; |
a6fa5992 PN |
60 | struct commit *commit; |
61 | ||
e82caf38 | 62 | if (get_oid_committish(name, &oid)) |
a6fa5992 | 63 | return NULL; |
bc83266a | 64 | commit = lookup_commit_reference(&oid); |
5e7d4d3e | 65 | if (parse_commit(commit)) |
a6fa5992 PN |
66 | return NULL; |
67 | return commit; | |
68 | } | |
69 | ||
dddbad72 | 70 | static timestamp_t parse_commit_date(const char *buf, const char *tail) |
175785e5 | 71 | { |
0a617799 | 72 | const char *dateptr; |
175785e5 | 73 | |
0a617799 MK |
74 | if (buf + 6 >= tail) |
75 | return 0; | |
175785e5 DB |
76 | if (memcmp(buf, "author", 6)) |
77 | return 0; | |
0a617799 | 78 | while (buf < tail && *buf++ != '\n') |
175785e5 | 79 | /* nada */; |
0a617799 MK |
80 | if (buf + 9 >= tail) |
81 | return 0; | |
175785e5 DB |
82 | if (memcmp(buf, "committer", 9)) |
83 | return 0; | |
0a617799 | 84 | while (buf < tail && *buf++ != '>') |
175785e5 | 85 | /* nada */; |
0a617799 MK |
86 | if (buf >= tail) |
87 | return 0; | |
88 | dateptr = buf; | |
89 | while (buf < tail && *buf++ != '\n') | |
90 | /* nada */; | |
91 | if (buf >= tail) | |
92 | return 0; | |
1aeb7e75 JS |
93 | /* dateptr < buf && buf[-1] == '\n', so parsing will stop at buf-1 */ |
94 | return parse_timestamp(dateptr, NULL, 10); | |
175785e5 DB |
95 | } |
96 | ||
5040f17e | 97 | static struct commit_graft **commit_graft; |
5da5c8f4 JH |
98 | static int commit_graft_alloc, commit_graft_nr; |
99 | ||
0a9136f3 DD |
100 | static const unsigned char *commit_graft_sha1_access(size_t index, void *table) |
101 | { | |
102 | struct commit_graft **commit_graft_table = table; | |
7683e2e6 | 103 | return commit_graft_table[index]->oid.hash; |
0a9136f3 DD |
104 | } |
105 | ||
5da5c8f4 JH |
106 | static int commit_graft_pos(const unsigned char *sha1) |
107 | { | |
0a9136f3 DD |
108 | return sha1_pos(sha1, commit_graft, commit_graft_nr, |
109 | commit_graft_sha1_access); | |
5da5c8f4 JH |
110 | } |
111 | ||
5040f17e JH |
112 | int register_commit_graft(struct commit_graft *graft, int ignore_dups) |
113 | { | |
7683e2e6 | 114 | int pos = commit_graft_pos(graft->oid.hash); |
a6080a0a | 115 | |
5040f17e JH |
116 | if (0 <= pos) { |
117 | if (ignore_dups) | |
118 | free(graft); | |
119 | else { | |
120 | free(commit_graft[pos]); | |
121 | commit_graft[pos] = graft; | |
122 | } | |
123 | return 1; | |
124 | } | |
125 | pos = -pos - 1; | |
d6e82b57 DD |
126 | ALLOC_GROW(commit_graft, commit_graft_nr + 1, commit_graft_alloc); |
127 | commit_graft_nr++; | |
5040f17e | 128 | if (pos < commit_graft_nr) |
f919ffeb SG |
129 | MOVE_ARRAY(commit_graft + pos + 1, commit_graft + pos, |
130 | commit_graft_nr - pos - 1); | |
5040f17e JH |
131 | commit_graft[pos] = graft; |
132 | return 0; | |
133 | } | |
134 | ||
9a934032 | 135 | struct commit_graft *read_graft_line(struct strbuf *line) |
5040f17e JH |
136 | { |
137 | /* The format is just "Commit Parent1 Parent2 ...\n" */ | |
cfa5bf16 PO |
138 | int i, phase; |
139 | const char *tail = NULL; | |
5040f17e | 140 | struct commit_graft *graft = NULL; |
cfa5bf16 | 141 | struct object_id dummy_oid, *oid; |
5040f17e | 142 | |
9a934032 PO |
143 | strbuf_rtrim(line); |
144 | if (!line->len || line->buf[0] == '#') | |
5bc4ce58 | 145 | return NULL; |
cfa5bf16 PO |
146 | /* |
147 | * phase 0 verifies line, counts hashes in line and allocates graft | |
148 | * phase 1 fills graft | |
149 | */ | |
150 | for (phase = 0; phase < 2; phase++) { | |
151 | oid = graft ? &graft->oid : &dummy_oid; | |
152 | if (parse_oid_hex(line->buf, oid, &tail)) | |
5040f17e | 153 | goto bad_graft_data; |
cfa5bf16 PO |
154 | for (i = 0; *tail != '\0'; i++) { |
155 | oid = graft ? &graft->parent[i] : &dummy_oid; | |
156 | if (!isspace(*tail++) || parse_oid_hex(tail, oid, &tail)) | |
157 | goto bad_graft_data; | |
158 | } | |
159 | if (!graft) { | |
160 | graft = xmalloc(st_add(sizeof(*graft), | |
161 | st_mult(sizeof(struct object_id), i))); | |
162 | graft->nr_parent = i; | |
163 | } | |
5040f17e JH |
164 | } |
165 | return graft; | |
df5d43be RT |
166 | |
167 | bad_graft_data: | |
9a934032 | 168 | error("bad graft data: %s", line->buf); |
cfa5bf16 | 169 | assert(!graft); |
df5d43be | 170 | return NULL; |
5040f17e JH |
171 | } |
172 | ||
c5ae6439 | 173 | static int read_graft_file(const char *graft_file) |
5da5c8f4 | 174 | { |
e9d983f1 | 175 | FILE *fp = fopen_or_warn(graft_file, "r"); |
e228c173 | 176 | struct strbuf buf = STRBUF_INIT; |
5040f17e JH |
177 | if (!fp) |
178 | return -1; | |
e228c173 | 179 | while (!strbuf_getwholeline(&buf, fp, '\n')) { |
5da5c8f4 | 180 | /* The format is just "Commit Parent1 Parent2 ...\n" */ |
9a934032 | 181 | struct commit_graft *graft = read_graft_line(&buf); |
5bc4ce58 JH |
182 | if (!graft) |
183 | continue; | |
5040f17e | 184 | if (register_commit_graft(graft, 1)) |
e228c173 | 185 | error("duplicate graft data: %s", buf.buf); |
5da5c8f4 JH |
186 | } |
187 | fclose(fp); | |
e228c173 | 188 | strbuf_release(&buf); |
5040f17e JH |
189 | return 0; |
190 | } | |
191 | ||
192 | static void prepare_commit_graft(void) | |
193 | { | |
194 | static int commit_graft_prepared; | |
195 | char *graft_file; | |
196 | ||
197 | if (commit_graft_prepared) | |
198 | return; | |
199 | graft_file = get_graft_file(); | |
200 | read_graft_file(graft_file); | |
ed09aef0 JS |
201 | /* make sure shallows are read */ |
202 | is_repository_shallow(); | |
5040f17e | 203 | commit_graft_prepared = 1; |
5da5c8f4 JH |
204 | } |
205 | ||
8b65a34c | 206 | struct commit_graft *lookup_commit_graft(const struct object_id *oid) |
5da5c8f4 JH |
207 | { |
208 | int pos; | |
5040f17e | 209 | prepare_commit_graft(); |
8b65a34c | 210 | pos = commit_graft_pos(oid->hash); |
5da5c8f4 JH |
211 | if (pos < 0) |
212 | return NULL; | |
213 | return commit_graft[pos]; | |
214 | } | |
215 | ||
09d46644 | 216 | int for_each_commit_graft(each_commit_graft_fn fn, void *cb_data) |
ed09aef0 | 217 | { |
09d46644 NTND |
218 | int i, ret; |
219 | for (i = ret = 0; i < commit_graft_nr && !ret; i++) | |
220 | ret = fn(commit_graft[i], cb_data); | |
221 | return ret; | |
ed09aef0 JS |
222 | } |
223 | ||
e92b848c | 224 | int unregister_shallow(const struct object_id *oid) |
f53514bc | 225 | { |
e92b848c | 226 | int pos = commit_graft_pos(oid->hash); |
f53514bc JS |
227 | if (pos < 0) |
228 | return -1; | |
229 | if (pos + 1 < commit_graft_nr) | |
f331ab9d RS |
230 | MOVE_ARRAY(commit_graft + pos, commit_graft + pos + 1, |
231 | commit_graft_nr - pos - 1); | |
f53514bc JS |
232 | commit_graft_nr--; |
233 | return 0; | |
234 | } | |
235 | ||
8597ea3a JK |
236 | struct commit_buffer { |
237 | void *buffer; | |
238 | unsigned long size; | |
239 | }; | |
240 | define_commit_slab(buffer_slab, struct commit_buffer); | |
c1b3c71f JK |
241 | static struct buffer_slab buffer_slab = COMMIT_SLAB_INIT(1, buffer_slab); |
242 | ||
8597ea3a | 243 | void set_commit_buffer(struct commit *commit, void *buffer, unsigned long size) |
66c2827e | 244 | { |
8597ea3a JK |
245 | struct commit_buffer *v = buffer_slab_at(&buffer_slab, commit); |
246 | v->buffer = buffer; | |
247 | v->size = size; | |
66c2827e JK |
248 | } |
249 | ||
8597ea3a | 250 | const void *get_cached_commit_buffer(const struct commit *commit, unsigned long *sizep) |
152ff1cc | 251 | { |
862e730e JH |
252 | struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); |
253 | if (!v) { | |
254 | if (sizep) | |
255 | *sizep = 0; | |
256 | return NULL; | |
257 | } | |
8597ea3a JK |
258 | if (sizep) |
259 | *sizep = v->size; | |
260 | return v->buffer; | |
152ff1cc JK |
261 | } |
262 | ||
8597ea3a | 263 | const void *get_commit_buffer(const struct commit *commit, unsigned long *sizep) |
152ff1cc | 264 | { |
8597ea3a | 265 | const void *ret = get_cached_commit_buffer(commit, sizep); |
152ff1cc JK |
266 | if (!ret) { |
267 | enum object_type type; | |
268 | unsigned long size; | |
ed1c9977 | 269 | ret = read_sha1_file(commit->object.oid.hash, &type, &size); |
152ff1cc JK |
270 | if (!ret) |
271 | die("cannot read commit object %s", | |
f2fd0760 | 272 | oid_to_hex(&commit->object.oid)); |
152ff1cc JK |
273 | if (type != OBJ_COMMIT) |
274 | die("expected commit for %s, got %s", | |
debca9d2 | 275 | oid_to_hex(&commit->object.oid), type_name(type)); |
8597ea3a JK |
276 | if (sizep) |
277 | *sizep = size; | |
152ff1cc JK |
278 | } |
279 | return ret; | |
280 | } | |
281 | ||
282 | void unuse_commit_buffer(const struct commit *commit, const void *buffer) | |
283 | { | |
862e730e JH |
284 | struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); |
285 | if (!(v && v->buffer == buffer)) | |
152ff1cc JK |
286 | free((void *)buffer); |
287 | } | |
288 | ||
0fb370da JK |
289 | void free_commit_buffer(struct commit *commit) |
290 | { | |
862e730e JH |
291 | struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); |
292 | if (v) { | |
6a83d902 | 293 | FREE_AND_NULL(v->buffer); |
862e730e JH |
294 | v->size = 0; |
295 | } | |
0fb370da JK |
296 | } |
297 | ||
8597ea3a | 298 | const void *detach_commit_buffer(struct commit *commit, unsigned long *sizep) |
0fb370da | 299 | { |
862e730e | 300 | struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); |
8597ea3a JK |
301 | void *ret; |
302 | ||
862e730e JH |
303 | if (!v) { |
304 | if (sizep) | |
305 | *sizep = 0; | |
306 | return NULL; | |
307 | } | |
8597ea3a JK |
308 | ret = v->buffer; |
309 | if (sizep) | |
310 | *sizep = v->size; | |
311 | ||
312 | v->buffer = NULL; | |
313 | v->size = 0; | |
0fb370da JK |
314 | return ret; |
315 | } | |
316 | ||
cf7b1cad | 317 | int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long size) |
175785e5 | 318 | { |
cf7b1cad NTND |
319 | const char *tail = buffer; |
320 | const char *bufptr = buffer; | |
7683e2e6 | 321 | struct object_id parent; |
6c88be16 | 322 | struct commit_list **pptr; |
5da5c8f4 | 323 | struct commit_graft *graft; |
7683e2e6 | 324 | const int tree_entry_len = GIT_SHA1_HEXSZ + 5; |
325 | const int parent_entry_len = GIT_SHA1_HEXSZ + 7; | |
bd2c39f5 | 326 | |
175785e5 DB |
327 | if (item->object.parsed) |
328 | return 0; | |
329 | item->object.parsed = 1; | |
3b44f15a | 330 | tail += size; |
7683e2e6 | 331 | if (tail <= bufptr + tree_entry_len + 1 || memcmp(bufptr, "tree ", 5) || |
332 | bufptr[tree_entry_len] != '\n') | |
f2fd0760 | 333 | return error("bogus commit object %s", oid_to_hex(&item->object.oid)); |
7683e2e6 | 334 | if (get_sha1_hex(bufptr + 5, parent.hash) < 0) |
bd2afde8 | 335 | return error("bad tree pointer in commit %s", |
f2fd0760 | 336 | oid_to_hex(&item->object.oid)); |
740ee055 | 337 | item->tree = lookup_tree(&parent); |
7683e2e6 | 338 | bufptr += tree_entry_len + 1; /* "tree " + "hex sha1" + "\n" */ |
6c88be16 | 339 | pptr = &item->parents; |
5da5c8f4 | 340 | |
8b65a34c | 341 | graft = lookup_commit_graft(&item->object.oid); |
7683e2e6 | 342 | while (bufptr + parent_entry_len < tail && !memcmp(bufptr, "parent ", 7)) { |
f7cc77d7 LT |
343 | struct commit *new_parent; |
344 | ||
7683e2e6 | 345 | if (tail <= bufptr + parent_entry_len + 1 || |
346 | get_sha1_hex(bufptr + 7, parent.hash) || | |
347 | bufptr[parent_entry_len] != '\n') | |
f2fd0760 | 348 | return error("bad parents in commit %s", oid_to_hex(&item->object.oid)); |
7683e2e6 | 349 | bufptr += parent_entry_len + 1; |
7f3140cd JS |
350 | /* |
351 | * The clone is shallow if nr_parent < 0, and we must | |
352 | * not traverse its real parents even when we unhide them. | |
353 | */ | |
354 | if (graft && (graft->nr_parent < 0 || grafts_replace_parents)) | |
5da5c8f4 | 355 | continue; |
bc83266a | 356 | new_parent = lookup_commit(&parent); |
39468def | 357 | if (new_parent) |
6c88be16 | 358 | pptr = &commit_list_insert(new_parent, pptr)->next; |
5da5c8f4 JH |
359 | } |
360 | if (graft) { | |
361 | int i; | |
362 | struct commit *new_parent; | |
363 | for (i = 0; i < graft->nr_parent; i++) { | |
bc83266a | 364 | new_parent = lookup_commit(&graft->parent[i]); |
5da5c8f4 JH |
365 | if (!new_parent) |
366 | continue; | |
367 | pptr = &commit_list_insert(new_parent, pptr)->next; | |
5da5c8f4 | 368 | } |
175785e5 | 369 | } |
0a617799 | 370 | item->date = parse_commit_date(bufptr, tail); |
27dedf0c | 371 | |
175785e5 DB |
372 | return 0; |
373 | } | |
374 | ||
9cc2b07a | 375 | int parse_commit_gently(struct commit *item, int quiet_on_missing) |
bd2c39f5 | 376 | { |
21666f1a | 377 | enum object_type type; |
bd2c39f5 NP |
378 | void *buffer; |
379 | unsigned long size; | |
380 | int ret; | |
381 | ||
9786f68b MK |
382 | if (!item) |
383 | return -1; | |
bd2c39f5 NP |
384 | if (item->object.parsed) |
385 | return 0; | |
ed1c9977 | 386 | buffer = read_sha1_file(item->object.oid.hash, &type, &size); |
bd2c39f5 | 387 | if (!buffer) |
9cc2b07a JK |
388 | return quiet_on_missing ? -1 : |
389 | error("Could not read %s", | |
f2fd0760 | 390 | oid_to_hex(&item->object.oid)); |
21666f1a | 391 | if (type != OBJ_COMMIT) { |
bd2c39f5 NP |
392 | free(buffer); |
393 | return error("Object %s not a commit", | |
f2fd0760 | 394 | oid_to_hex(&item->object.oid)); |
bd2c39f5 NP |
395 | } |
396 | ret = parse_commit_buffer(item, buffer, size); | |
60ab26de | 397 | if (save_commit_buffer && !ret) { |
8597ea3a | 398 | set_commit_buffer(item, buffer, size); |
3ff1fbbb LT |
399 | return 0; |
400 | } | |
bd2c39f5 NP |
401 | free(buffer); |
402 | return ret; | |
403 | } | |
404 | ||
7059dccc JK |
405 | void parse_commit_or_die(struct commit *item) |
406 | { | |
407 | if (parse_commit(item)) | |
408 | die("unable to parse commit %s", | |
f2fd0760 | 409 | item ? oid_to_hex(&item->object.oid) : "(null)"); |
7059dccc JK |
410 | } |
411 | ||
11af2aae CC |
412 | int find_commit_subject(const char *commit_buffer, const char **subject) |
413 | { | |
414 | const char *eol; | |
415 | const char *p = commit_buffer; | |
416 | ||
417 | while (*p && (*p != '\n' || p[1] != '\n')) | |
418 | p++; | |
419 | if (*p) { | |
4e1b06da | 420 | p = skip_blank_lines(p + 2); |
9c9b03b1 | 421 | eol = strchrnul(p, '\n'); |
11af2aae CC |
422 | } else |
423 | eol = p; | |
424 | ||
425 | *subject = p; | |
426 | ||
427 | return eol - p; | |
428 | } | |
429 | ||
ac5155ef | 430 | struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p) |
dd97f850 | 431 | { |
812666c8 | 432 | struct commit_list *new_list = xmalloc(sizeof(struct commit_list)); |
dd97f850 DB |
433 | new_list->item = item; |
434 | new_list->next = *list_p; | |
435 | *list_p = new_list; | |
ac5155ef | 436 | return new_list; |
dd97f850 DB |
437 | } |
438 | ||
65319475 MV |
439 | unsigned commit_list_count(const struct commit_list *l) |
440 | { | |
441 | unsigned c = 0; | |
442 | for (; l; l = l->next ) | |
443 | c++; | |
444 | return c; | |
445 | } | |
446 | ||
53d00b39 TR |
447 | struct commit_list *copy_commit_list(struct commit_list *list) |
448 | { | |
449 | struct commit_list *head = NULL; | |
450 | struct commit_list **pp = &head; | |
451 | while (list) { | |
cb979dbd | 452 | pp = commit_list_append(list->item, pp); |
53d00b39 TR |
453 | list = list->next; |
454 | } | |
455 | return head; | |
456 | } | |
457 | ||
175785e5 DB |
458 | void free_commit_list(struct commit_list *list) |
459 | { | |
e510ab89 RS |
460 | while (list) |
461 | pop_commit(&list); | |
175785e5 | 462 | } |
dd97f850 | 463 | |
47e44ed1 | 464 | struct commit_list * commit_list_insert_by_date(struct commit *item, struct commit_list **list) |
dd97f850 DB |
465 | { |
466 | struct commit_list **pp = list; | |
467 | struct commit_list *p; | |
468 | while ((p = *pp) != NULL) { | |
469 | if (p->item->date < item->date) { | |
470 | break; | |
471 | } | |
472 | pp = &p->next; | |
473 | } | |
f755494c | 474 | return commit_list_insert(item, pp); |
dd97f850 DB |
475 | } |
476 | ||
46905893 RS |
477 | static int commit_list_compare_by_date(const void *a, const void *b) |
478 | { | |
dddbad72 JS |
479 | timestamp_t a_date = ((const struct commit_list *)a)->item->date; |
480 | timestamp_t b_date = ((const struct commit_list *)b)->item->date; | |
46905893 RS |
481 | if (a_date < b_date) |
482 | return 1; | |
483 | if (a_date > b_date) | |
484 | return -1; | |
485 | return 0; | |
486 | } | |
487 | ||
488 | static void *commit_list_get_next(const void *a) | |
489 | { | |
490 | return ((const struct commit_list *)a)->next; | |
491 | } | |
492 | ||
493 | static void commit_list_set_next(void *a, void *next) | |
494 | { | |
495 | ((struct commit_list *)a)->next = next; | |
496 | } | |
a6080a0a | 497 | |
47e44ed1 | 498 | void commit_list_sort_by_date(struct commit_list **list) |
dd97f850 | 499 | { |
7365c95d JH |
500 | *list = llist_mergesort(*list, commit_list_get_next, commit_list_set_next, |
501 | commit_list_compare_by_date); | |
dd97f850 DB |
502 | } |
503 | ||
58e28af6 DB |
504 | struct commit *pop_most_recent_commit(struct commit_list **list, |
505 | unsigned int mark) | |
dd97f850 | 506 | { |
e510ab89 | 507 | struct commit *ret = pop_commit(list); |
dd97f850 | 508 | struct commit_list *parents = ret->parents; |
dd97f850 DB |
509 | |
510 | while (parents) { | |
4056c091 | 511 | struct commit *commit = parents->item; |
dec38c81 | 512 | if (!parse_commit(commit) && !(commit->object.flags & mark)) { |
58e28af6 | 513 | commit->object.flags |= mark; |
47e44ed1 | 514 | commit_list_insert_by_date(commit, list); |
4056c091 | 515 | } |
dd97f850 DB |
516 | parents = parents->next; |
517 | } | |
518 | return ret; | |
519 | } | |
e3bc7a3b | 520 | |
941ba8db NTND |
521 | static void clear_commit_marks_1(struct commit_list **plist, |
522 | struct commit *commit, unsigned int mark) | |
f8f9c73c | 523 | { |
60fcc2e6 JS |
524 | while (commit) { |
525 | struct commit_list *parents; | |
f8f9c73c | 526 | |
60fcc2e6 JS |
527 | if (!(mark & commit->object.flags)) |
528 | return; | |
58ecf5c1 | 529 | |
60fcc2e6 JS |
530 | commit->object.flags &= ~mark; |
531 | ||
532 | parents = commit->parents; | |
533 | if (!parents) | |
534 | return; | |
535 | ||
536 | while ((parents = parents->next)) | |
941ba8db | 537 | commit_list_insert(parents->item, plist); |
60fcc2e6 JS |
538 | |
539 | commit = commit->parents->item; | |
f8f9c73c JH |
540 | } |
541 | } | |
542 | ||
e895cb51 | 543 | void clear_commit_marks_many(int nr, struct commit **commit, unsigned int mark) |
941ba8db NTND |
544 | { |
545 | struct commit_list *list = NULL; | |
e895cb51 JH |
546 | |
547 | while (nr--) { | |
07f7d55a | 548 | clear_commit_marks_1(&list, *commit, mark); |
e895cb51 JH |
549 | commit++; |
550 | } | |
941ba8db NTND |
551 | while (list) |
552 | clear_commit_marks_1(&list, pop_commit(&list), mark); | |
553 | } | |
554 | ||
e895cb51 JH |
555 | void clear_commit_marks(struct commit *commit, unsigned int mark) |
556 | { | |
557 | clear_commit_marks_many(1, &commit, mark); | |
558 | } | |
559 | ||
a3437b8c JS |
560 | struct commit *pop_commit(struct commit_list **stack) |
561 | { | |
562 | struct commit_list *top = *stack; | |
563 | struct commit *item = top ? top->item : NULL; | |
564 | ||
565 | if (top) { | |
566 | *stack = top->next; | |
567 | free(top); | |
568 | } | |
569 | return item; | |
570 | } | |
571 | ||
a84b794a JH |
572 | /* |
573 | * Topological sort support | |
574 | */ | |
96c4f4a3 | 575 | |
a84b794a JH |
576 | /* count number of children that have not been emitted */ |
577 | define_commit_slab(indegree_slab, int); | |
96c4f4a3 | 578 | |
81c6b38b JH |
579 | /* record author-date for each commit object */ |
580 | define_commit_slab(author_date_slab, unsigned long); | |
581 | ||
582 | static void record_author_date(struct author_date_slab *author_date, | |
583 | struct commit *commit) | |
584 | { | |
8597ea3a | 585 | const char *buffer = get_commit_buffer(commit, NULL); |
81c6b38b | 586 | struct ident_split ident; |
ea5517f0 JK |
587 | const char *ident_line; |
588 | size_t ident_len; | |
81c6b38b | 589 | char *date_end; |
dddbad72 | 590 | timestamp_t date; |
81c6b38b | 591 | |
ea5517f0 JK |
592 | ident_line = find_commit_header(buffer, "author", &ident_len); |
593 | if (!ident_line) | |
594 | goto fail_exit; /* no author line */ | |
595 | if (split_ident_line(&ident, ident_line, ident_len) || | |
596 | !ident.date_begin || !ident.date_end) | |
597 | goto fail_exit; /* malformed "author" line */ | |
81c6b38b | 598 | |
1aeb7e75 | 599 | date = parse_timestamp(ident.date_begin, &date_end, 10); |
81c6b38b JH |
600 | if (date_end != ident.date_end) |
601 | goto fail_exit; /* malformed date */ | |
602 | *(author_date_slab_at(author_date, commit)) = date; | |
603 | ||
604 | fail_exit: | |
ba41c1c9 | 605 | unuse_commit_buffer(commit, buffer); |
81c6b38b JH |
606 | } |
607 | ||
608 | static int compare_commits_by_author_date(const void *a_, const void *b_, | |
609 | void *cb_data) | |
610 | { | |
611 | const struct commit *a = a_, *b = b_; | |
612 | struct author_date_slab *author_date = cb_data; | |
dddbad72 JS |
613 | timestamp_t a_date = *(author_date_slab_at(author_date, a)); |
614 | timestamp_t b_date = *(author_date_slab_at(author_date, b)); | |
81c6b38b JH |
615 | |
616 | /* newer commits with larger date first */ | |
617 | if (a_date < b_date) | |
618 | return 1; | |
619 | else if (a_date > b_date) | |
620 | return -1; | |
621 | return 0; | |
622 | } | |
623 | ||
727377ff | 624 | int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused) |
da24b104 JH |
625 | { |
626 | const struct commit *a = a_, *b = b_; | |
627 | /* newer commits with larger date first */ | |
628 | if (a->date < b->date) | |
629 | return 1; | |
630 | else if (a->date > b->date) | |
631 | return -1; | |
632 | return 0; | |
633 | } | |
634 | ||
ab580ace JS |
635 | /* |
636 | * Performs an in-place topological sort on the list supplied. | |
637 | */ | |
da24b104 | 638 | void sort_in_topological_order(struct commit_list **list, enum rev_sort_order sort_order) |
6b6dcfc2 | 639 | { |
23c17d4a | 640 | struct commit_list *next, *orig = *list; |
23c17d4a | 641 | struct commit_list **pptr; |
a84b794a | 642 | struct indegree_slab indegree; |
da24b104 JH |
643 | struct prio_queue queue; |
644 | struct commit *commit; | |
81c6b38b | 645 | struct author_date_slab author_date; |
a6080a0a | 646 | |
23c17d4a | 647 | if (!orig) |
7d6fb370 | 648 | return; |
23c17d4a LT |
649 | *list = NULL; |
650 | ||
a84b794a | 651 | init_indegree_slab(&indegree); |
da24b104 | 652 | memset(&queue, '\0', sizeof(queue)); |
81c6b38b | 653 | |
da24b104 JH |
654 | switch (sort_order) { |
655 | default: /* REV_SORT_IN_GRAPH_ORDER */ | |
656 | queue.compare = NULL; | |
657 | break; | |
658 | case REV_SORT_BY_COMMIT_DATE: | |
659 | queue.compare = compare_commits_by_commit_date; | |
660 | break; | |
81c6b38b JH |
661 | case REV_SORT_BY_AUTHOR_DATE: |
662 | init_author_date_slab(&author_date); | |
663 | queue.compare = compare_commits_by_author_date; | |
664 | queue.cb_data = &author_date; | |
665 | break; | |
da24b104 | 666 | } |
96c4f4a3 | 667 | |
23c17d4a LT |
668 | /* Mark them and clear the indegree */ |
669 | for (next = orig; next; next = next->next) { | |
670 | struct commit *commit = next->item; | |
a84b794a | 671 | *(indegree_slab_at(&indegree, commit)) = 1; |
81c6b38b JH |
672 | /* also record the author dates, if needed */ |
673 | if (sort_order == REV_SORT_BY_AUTHOR_DATE) | |
674 | record_author_date(&author_date, commit); | |
ab580ace | 675 | } |
23c17d4a | 676 | |
ab580ace | 677 | /* update the indegree */ |
23c17d4a | 678 | for (next = orig; next; next = next->next) { |
da24b104 | 679 | struct commit_list *parents = next->item->parents; |
ab580ace | 680 | while (parents) { |
23c17d4a | 681 | struct commit *parent = parents->item; |
a84b794a | 682 | int *pi = indegree_slab_at(&indegree, parent); |
6b6dcfc2 | 683 | |
96c4f4a3 JK |
684 | if (*pi) |
685 | (*pi)++; | |
23c17d4a | 686 | parents = parents->next; |
ab580ace | 687 | } |
ab580ace | 688 | } |
23c17d4a | 689 | |
a6080a0a | 690 | /* |
674d1727 PH |
691 | * find the tips |
692 | * | |
693 | * tips are nodes not reachable from any other node in the list | |
694 | * | |
695 | * the tips serve as a starting set for the work queue. | |
696 | */ | |
23c17d4a LT |
697 | for (next = orig; next; next = next->next) { |
698 | struct commit *commit = next->item; | |
ab580ace | 699 | |
a84b794a | 700 | if (*(indegree_slab_at(&indegree, commit)) == 1) |
da24b104 | 701 | prio_queue_put(&queue, commit); |
ab580ace | 702 | } |
4c8725f1 | 703 | |
da24b104 JH |
704 | /* |
705 | * This is unfortunate; the initial tips need to be shown | |
706 | * in the order given from the revision traversal machinery. | |
707 | */ | |
708 | if (sort_order == REV_SORT_IN_GRAPH_ORDER) | |
709 | prio_queue_reverse(&queue); | |
710 | ||
711 | /* We no longer need the commit list */ | |
712 | free_commit_list(orig); | |
23c17d4a LT |
713 | |
714 | pptr = list; | |
715 | *list = NULL; | |
da24b104 JH |
716 | while ((commit = prio_queue_get(&queue)) != NULL) { |
717 | struct commit_list *parents; | |
23c17d4a | 718 | |
23c17d4a | 719 | for (parents = commit->parents; parents ; parents = parents->next) { |
cd2b8ae9 | 720 | struct commit *parent = parents->item; |
a84b794a | 721 | int *pi = indegree_slab_at(&indegree, parent); |
23c17d4a | 722 | |
96c4f4a3 | 723 | if (!*pi) |
23c17d4a LT |
724 | continue; |
725 | ||
726 | /* | |
727 | * parents are only enqueued for emission | |
728 | * when all their children have been emitted thereby | |
729 | * guaranteeing topological order. | |
730 | */ | |
da24b104 JH |
731 | if (--(*pi) == 1) |
732 | prio_queue_put(&queue, parent); | |
ab580ace JS |
733 | } |
734 | /* | |
da24b104 JH |
735 | * all children of commit have already been |
736 | * emitted. we can emit it now. | |
674d1727 | 737 | */ |
a84b794a | 738 | *(indegree_slab_at(&indegree, commit)) = 0; |
da24b104 JH |
739 | |
740 | pptr = &commit_list_insert(commit, pptr)->next; | |
ab580ace | 741 | } |
96c4f4a3 | 742 | |
a84b794a | 743 | clear_indegree_slab(&indegree); |
da24b104 | 744 | clear_prio_queue(&queue); |
81c6b38b JH |
745 | if (sort_order == REV_SORT_BY_AUTHOR_DATE) |
746 | clear_author_date_slab(&author_date); | |
ab580ace | 747 | } |
7c6f8aaf | 748 | |
1295228d | 749 | /* merge-base stuff */ |
7c6f8aaf | 750 | |
208acbfb | 751 | /* Remember to update object flag allocation in object.h */ |
577ed5c2 JH |
752 | #define PARENT1 (1u<<16) |
753 | #define PARENT2 (1u<<17) | |
754 | #define STALE (1u<<18) | |
755 | #define RESULT (1u<<19) | |
7c6f8aaf | 756 | |
1295228d JH |
757 | static const unsigned all_flags = (PARENT1 | PARENT2 | STALE | RESULT); |
758 | ||
73f43f22 | 759 | static int queue_has_nonstale(struct prio_queue *queue) |
7c6f8aaf | 760 | { |
73f43f22 JK |
761 | int i; |
762 | for (i = 0; i < queue->nr; i++) { | |
763 | struct commit *commit = queue->array[i].data; | |
764 | if (!(commit->object.flags & STALE)) | |
765 | return 1; | |
7c6f8aaf | 766 | } |
73f43f22 | 767 | return 0; |
7c6f8aaf JS |
768 | } |
769 | ||
d866924a | 770 | /* all input commits in one and twos[] must have been parsed! */ |
da1f5156 | 771 | static struct commit_list *paint_down_to_common(struct commit *one, int n, struct commit **twos) |
7c6f8aaf | 772 | { |
73f43f22 | 773 | struct prio_queue queue = { compare_commits_by_commit_date }; |
7c6f8aaf | 774 | struct commit_list *result = NULL; |
6a938648 | 775 | int i; |
7c6f8aaf | 776 | |
f3249438 | 777 | one->object.flags |= PARENT1; |
73f43f22 JK |
778 | if (!n) { |
779 | commit_list_append(one, &result); | |
780 | return result; | |
781 | } | |
782 | prio_queue_put(&queue, one); | |
783 | ||
6a938648 JH |
784 | for (i = 0; i < n; i++) { |
785 | twos[i]->object.flags |= PARENT2; | |
73f43f22 | 786 | prio_queue_put(&queue, twos[i]); |
6a938648 | 787 | } |
7c6f8aaf | 788 | |
73f43f22 JK |
789 | while (queue_has_nonstale(&queue)) { |
790 | struct commit *commit = prio_queue_get(&queue); | |
7c6f8aaf | 791 | struct commit_list *parents; |
f3249438 | 792 | int flags; |
7c6f8aaf | 793 | |
f3249438 JH |
794 | flags = commit->object.flags & (PARENT1 | PARENT2 | STALE); |
795 | if (flags == (PARENT1 | PARENT2)) { | |
796 | if (!(commit->object.flags & RESULT)) { | |
797 | commit->object.flags |= RESULT; | |
47e44ed1 | 798 | commit_list_insert_by_date(commit, &result); |
f3249438 | 799 | } |
542ccefe JH |
800 | /* Mark parents of a found merge stale */ |
801 | flags |= STALE; | |
7c6f8aaf JS |
802 | } |
803 | parents = commit->parents; | |
804 | while (parents) { | |
805 | struct commit *p = parents->item; | |
806 | parents = parents->next; | |
807 | if ((p->object.flags & flags) == flags) | |
808 | continue; | |
172947e6 MK |
809 | if (parse_commit(p)) |
810 | return NULL; | |
7c6f8aaf | 811 | p->object.flags |= flags; |
73f43f22 | 812 | prio_queue_put(&queue, p); |
7c6f8aaf JS |
813 | } |
814 | } | |
815 | ||
73f43f22 | 816 | clear_prio_queue(&queue); |
da1f5156 JH |
817 | return result; |
818 | } | |
819 | ||
820 | static struct commit_list *merge_bases_many(struct commit *one, int n, struct commit **twos) | |
821 | { | |
822 | struct commit_list *list = NULL; | |
823 | struct commit_list *result = NULL; | |
824 | int i; | |
825 | ||
826 | for (i = 0; i < n; i++) { | |
827 | if (one == twos[i]) | |
828 | /* | |
829 | * We do not mark this even with RESULT so we do not | |
830 | * have to clean it up. | |
831 | */ | |
832 | return commit_list_insert(one, &result); | |
833 | } | |
834 | ||
835 | if (parse_commit(one)) | |
836 | return NULL; | |
837 | for (i = 0; i < n; i++) { | |
838 | if (parse_commit(twos[i])) | |
839 | return NULL; | |
840 | } | |
841 | ||
842 | list = paint_down_to_common(one, n, twos); | |
843 | ||
f3249438 | 844 | while (list) { |
e510ab89 RS |
845 | struct commit *commit = pop_commit(&list); |
846 | if (!(commit->object.flags & STALE)) | |
847 | commit_list_insert_by_date(commit, &result); | |
f3249438 JH |
848 | } |
849 | return result; | |
850 | } | |
7c6f8aaf | 851 | |
5240c9d7 MV |
852 | struct commit_list *get_octopus_merge_bases(struct commit_list *in) |
853 | { | |
854 | struct commit_list *i, *j, *k, *ret = NULL; | |
5240c9d7 | 855 | |
6bc76725 VM |
856 | if (!in) |
857 | return ret; | |
858 | ||
859 | commit_list_insert(in->item, &ret); | |
860 | ||
861 | for (i = in->next; i; i = i->next) { | |
258c03eb | 862 | struct commit_list *new_commits = NULL, *end = NULL; |
6bc76725 VM |
863 | |
864 | for (j = ret; j; j = j->next) { | |
865 | struct commit_list *bases; | |
2ce406cc | 866 | bases = get_merge_bases(i->item, j->item); |
258c03eb BW |
867 | if (!new_commits) |
868 | new_commits = bases; | |
6bc76725 VM |
869 | else |
870 | end->next = bases; | |
871 | for (k = bases; k; k = k->next) | |
872 | end = k; | |
5240c9d7 | 873 | } |
258c03eb | 874 | ret = new_commits; |
5240c9d7 MV |
875 | } |
876 | return ret; | |
877 | } | |
878 | ||
94f0ced0 JH |
879 | static int remove_redundant(struct commit **array, int cnt) |
880 | { | |
881 | /* | |
882 | * Some commit in the array may be an ancestor of | |
883 | * another commit. Move such commit to the end of | |
884 | * the array, and return the number of commits that | |
885 | * are independent from each other. | |
886 | */ | |
887 | struct commit **work; | |
888 | unsigned char *redundant; | |
889 | int *filled_index; | |
890 | int i, j, filled; | |
891 | ||
892 | work = xcalloc(cnt, sizeof(*work)); | |
893 | redundant = xcalloc(cnt, 1); | |
b32fa95f | 894 | ALLOC_ARRAY(filled_index, cnt - 1); |
94f0ced0 | 895 | |
d866924a JH |
896 | for (i = 0; i < cnt; i++) |
897 | parse_commit(array[i]); | |
94f0ced0 JH |
898 | for (i = 0; i < cnt; i++) { |
899 | struct commit_list *common; | |
900 | ||
901 | if (redundant[i]) | |
902 | continue; | |
903 | for (j = filled = 0; j < cnt; j++) { | |
904 | if (i == j || redundant[j]) | |
905 | continue; | |
906 | filled_index[filled] = j; | |
907 | work[filled++] = array[j]; | |
908 | } | |
909 | common = paint_down_to_common(array[i], filled, work); | |
910 | if (array[i]->object.flags & PARENT2) | |
911 | redundant[i] = 1; | |
912 | for (j = 0; j < filled; j++) | |
913 | if (work[j]->object.flags & PARENT1) | |
914 | redundant[filled_index[j]] = 1; | |
915 | clear_commit_marks(array[i], all_flags); | |
abc03512 | 916 | clear_commit_marks_many(filled, work, all_flags); |
94f0ced0 JH |
917 | free_commit_list(common); |
918 | } | |
919 | ||
920 | /* Now collect the result */ | |
45ccef87 | 921 | COPY_ARRAY(work, array, cnt); |
94f0ced0 JH |
922 | for (i = filled = 0; i < cnt; i++) |
923 | if (!redundant[i]) | |
924 | array[filled++] = work[i]; | |
925 | for (j = filled, i = 0; i < cnt; i++) | |
926 | if (redundant[i]) | |
927 | array[j++] = work[i]; | |
928 | free(work); | |
929 | free(redundant); | |
930 | free(filled_index); | |
931 | return filled; | |
932 | } | |
933 | ||
2ce406cc JH |
934 | static struct commit_list *get_merge_bases_many_0(struct commit *one, |
935 | int n, | |
936 | struct commit **twos, | |
937 | int cleanup) | |
f3249438 | 938 | { |
f3249438 JH |
939 | struct commit_list *list; |
940 | struct commit **rslt; | |
941 | struct commit_list *result; | |
94f0ced0 | 942 | int cnt, i; |
f3249438 | 943 | |
6a938648 JH |
944 | result = merge_bases_many(one, n, twos); |
945 | for (i = 0; i < n; i++) { | |
946 | if (one == twos[i]) | |
947 | return result; | |
948 | } | |
f3249438 JH |
949 | if (!result || !result->next) { |
950 | if (cleanup) { | |
951 | clear_commit_marks(one, all_flags); | |
e895cb51 | 952 | clear_commit_marks_many(n, twos, all_flags); |
7c6f8aaf | 953 | } |
f3249438 | 954 | return result; |
7c6f8aaf JS |
955 | } |
956 | ||
f3249438 | 957 | /* There are more than one */ |
4bbaa1eb | 958 | cnt = commit_list_count(result); |
f3249438 JH |
959 | rslt = xcalloc(cnt, sizeof(*rslt)); |
960 | for (list = result, i = 0; list; list = list->next) | |
961 | rslt[i++] = list->item; | |
962 | free_commit_list(result); | |
963 | ||
964 | clear_commit_marks(one, all_flags); | |
e895cb51 | 965 | clear_commit_marks_many(n, twos, all_flags); |
7c6f8aaf | 966 | |
94f0ced0 | 967 | cnt = remove_redundant(rslt, cnt); |
f3249438 | 968 | result = NULL; |
94f0ced0 JH |
969 | for (i = 0; i < cnt; i++) |
970 | commit_list_insert_by_date(rslt[i], &result); | |
f3249438 | 971 | free(rslt); |
7c6f8aaf JS |
972 | return result; |
973 | } | |
2ecd2bbc | 974 | |
2ce406cc JH |
975 | struct commit_list *get_merge_bases_many(struct commit *one, |
976 | int n, | |
977 | struct commit **twos) | |
978 | { | |
979 | return get_merge_bases_many_0(one, n, twos, 1); | |
980 | } | |
981 | ||
982 | struct commit_list *get_merge_bases_many_dirty(struct commit *one, | |
983 | int n, | |
984 | struct commit **twos) | |
985 | { | |
986 | return get_merge_bases_many_0(one, n, twos, 0); | |
987 | } | |
988 | ||
989 | struct commit_list *get_merge_bases(struct commit *one, struct commit *two) | |
6a938648 | 990 | { |
2ce406cc | 991 | return get_merge_bases_many_0(one, 1, &two, 1); |
6a938648 JH |
992 | } |
993 | ||
a20efee9 | 994 | /* |
41ccfdd9 | 995 | * Is "commit" a descendant of one of the elements on the "with_commit" list? |
a20efee9 | 996 | */ |
7fcdb36e JG |
997 | int is_descendant_of(struct commit *commit, struct commit_list *with_commit) |
998 | { | |
999 | if (!with_commit) | |
1000 | return 1; | |
1001 | while (with_commit) { | |
1002 | struct commit *other; | |
1003 | ||
1004 | other = with_commit->item; | |
1005 | with_commit = with_commit->next; | |
a20efee9 | 1006 | if (in_merge_bases(other, commit)) |
7fcdb36e JG |
1007 | return 1; |
1008 | } | |
1009 | return 0; | |
1010 | } | |
1011 | ||
a20efee9 | 1012 | /* |
4c4b27e8 | 1013 | * Is "commit" an ancestor of one of the "references"? |
a20efee9 | 1014 | */ |
4c4b27e8 | 1015 | int in_merge_bases_many(struct commit *commit, int nr_reference, struct commit **reference) |
2ecd2bbc | 1016 | { |
6440fdba | 1017 | struct commit_list *bases; |
4c4b27e8 | 1018 | int ret = 0, i; |
2ecd2bbc | 1019 | |
4c4b27e8 | 1020 | if (parse_commit(commit)) |
6440fdba | 1021 | return ret; |
4c4b27e8 JH |
1022 | for (i = 0; i < nr_reference; i++) |
1023 | if (parse_commit(reference[i])) | |
1024 | return ret; | |
2ecd2bbc | 1025 | |
4c4b27e8 | 1026 | bases = paint_down_to_common(commit, nr_reference, reference); |
6440fdba JH |
1027 | if (commit->object.flags & PARENT2) |
1028 | ret = 1; | |
b0f9e9ee | 1029 | clear_commit_marks(commit, all_flags); |
557899ff | 1030 | clear_commit_marks_many(nr_reference, reference, all_flags); |
2ecd2bbc JH |
1031 | free_commit_list(bases); |
1032 | return ret; | |
1033 | } | |
98cf9c3b | 1034 | |
4c4b27e8 JH |
1035 | /* |
1036 | * Is "commit" an ancestor of (i.e. reachable from) the "reference"? | |
1037 | */ | |
1038 | int in_merge_bases(struct commit *commit, struct commit *reference) | |
1039 | { | |
1040 | return in_merge_bases_many(commit, 1, &reference); | |
1041 | } | |
1042 | ||
98cf9c3b JH |
1043 | struct commit_list *reduce_heads(struct commit_list *heads) |
1044 | { | |
1045 | struct commit_list *p; | |
1046 | struct commit_list *result = NULL, **tail = &result; | |
f37d3c75 JH |
1047 | struct commit **array; |
1048 | int num_head, i; | |
98cf9c3b JH |
1049 | |
1050 | if (!heads) | |
1051 | return NULL; | |
1052 | ||
f37d3c75 JH |
1053 | /* Uniquify */ |
1054 | for (p = heads; p; p = p->next) | |
1055 | p->item->object.flags &= ~STALE; | |
1056 | for (p = heads, num_head = 0; p; p = p->next) { | |
1057 | if (p->item->object.flags & STALE) | |
711f6b29 | 1058 | continue; |
f37d3c75 JH |
1059 | p->item->object.flags |= STALE; |
1060 | num_head++; | |
1061 | } | |
c4a7b009 | 1062 | array = xcalloc(num_head, sizeof(*array)); |
f37d3c75 JH |
1063 | for (p = heads, i = 0; p; p = p->next) { |
1064 | if (p->item->object.flags & STALE) { | |
1065 | array[i++] = p->item; | |
1066 | p->item->object.flags &= ~STALE; | |
98cf9c3b | 1067 | } |
98cf9c3b | 1068 | } |
f37d3c75 JH |
1069 | num_head = remove_redundant(array, num_head); |
1070 | for (i = 0; i < num_head; i++) | |
1071 | tail = &commit_list_insert(array[i], tail)->next; | |
cb7b29eb | 1072 | free(array); |
98cf9c3b JH |
1073 | return result; |
1074 | } | |
40d52ff7 | 1075 | |
4da72644 MÅ |
1076 | void reduce_heads_replace(struct commit_list **heads) |
1077 | { | |
1078 | struct commit_list *result = reduce_heads(*heads); | |
1079 | free_commit_list(*heads); | |
1080 | *heads = result; | |
1081 | } | |
1082 | ||
ba3c69a9 JH |
1083 | static const char gpg_sig_header[] = "gpgsig"; |
1084 | static const int gpg_sig_header_len = sizeof(gpg_sig_header) - 1; | |
1085 | ||
1086 | static int do_sign_commit(struct strbuf *buf, const char *keyid) | |
1087 | { | |
1088 | struct strbuf sig = STRBUF_INIT; | |
1089 | int inspos, copypos; | |
3324dd8f | 1090 | const char *eoh; |
ba3c69a9 JH |
1091 | |
1092 | /* find the end of the header */ | |
3324dd8f JS |
1093 | eoh = strstr(buf->buf, "\n\n"); |
1094 | if (!eoh) | |
1095 | inspos = buf->len; | |
1096 | else | |
1097 | inspos = eoh - buf->buf + 1; | |
ba3c69a9 JH |
1098 | |
1099 | if (!keyid || !*keyid) | |
1100 | keyid = get_signing_key(); | |
1101 | if (sign_buffer(buf, &sig, keyid)) { | |
1102 | strbuf_release(&sig); | |
1103 | return -1; | |
1104 | } | |
1105 | ||
1106 | for (copypos = 0; sig.buf[copypos]; ) { | |
1107 | const char *bol = sig.buf + copypos; | |
1108 | const char *eol = strchrnul(bol, '\n'); | |
1109 | int len = (eol - bol) + !!*eol; | |
1110 | ||
1111 | if (!copypos) { | |
1112 | strbuf_insert(buf, inspos, gpg_sig_header, gpg_sig_header_len); | |
1113 | inspos += gpg_sig_header_len; | |
1114 | } | |
1115 | strbuf_insert(buf, inspos++, " ", 1); | |
1116 | strbuf_insert(buf, inspos, bol, len); | |
1117 | inspos += len; | |
1118 | copypos += len; | |
1119 | } | |
1120 | strbuf_release(&sig); | |
1121 | return 0; | |
1122 | } | |
1123 | ||
218aa3a6 | 1124 | int parse_signed_commit(const struct commit *commit, |
0c37f1fc JH |
1125 | struct strbuf *payload, struct strbuf *signature) |
1126 | { | |
218aa3a6 | 1127 | |
0c37f1fc | 1128 | unsigned long size; |
218aa3a6 | 1129 | const char *buffer = get_commit_buffer(commit, &size); |
0c37f1fc | 1130 | int in_signature, saw_signature = -1; |
218aa3a6 | 1131 | const char *line, *tail; |
0c37f1fc JH |
1132 | |
1133 | line = buffer; | |
1134 | tail = buffer + size; | |
1135 | in_signature = 0; | |
1136 | saw_signature = 0; | |
1137 | while (line < tail) { | |
1138 | const char *sig = NULL; | |
218aa3a6 | 1139 | const char *next = memchr(line, '\n', tail - line); |
0c37f1fc JH |
1140 | |
1141 | next = next ? next + 1 : tail; | |
1142 | if (in_signature && line[0] == ' ') | |
1143 | sig = line + 1; | |
59556548 | 1144 | else if (starts_with(line, gpg_sig_header) && |
0c37f1fc JH |
1145 | line[gpg_sig_header_len] == ' ') |
1146 | sig = line + gpg_sig_header_len + 1; | |
1147 | if (sig) { | |
1148 | strbuf_add(signature, sig, next - sig); | |
1149 | saw_signature = 1; | |
1150 | in_signature = 1; | |
1151 | } else { | |
1152 | if (*line == '\n') | |
1153 | /* dump the whole remainder of the buffer */ | |
1154 | next = tail; | |
1155 | strbuf_add(payload, line, next - line); | |
1156 | in_signature = 0; | |
1157 | } | |
1158 | line = next; | |
1159 | } | |
218aa3a6 | 1160 | unuse_commit_buffer(commit, buffer); |
0c37f1fc JH |
1161 | return saw_signature; |
1162 | } | |
1163 | ||
0b05ab6f CC |
1164 | int remove_signature(struct strbuf *buf) |
1165 | { | |
1166 | const char *line = buf->buf; | |
1167 | const char *tail = buf->buf + buf->len; | |
1168 | int in_signature = 0; | |
1169 | const char *sig_start = NULL; | |
1170 | const char *sig_end = NULL; | |
1171 | ||
1172 | while (line < tail) { | |
1173 | const char *next = memchr(line, '\n', tail - line); | |
1174 | next = next ? next + 1 : tail; | |
1175 | ||
1176 | if (in_signature && line[0] == ' ') | |
1177 | sig_end = next; | |
1178 | else if (starts_with(line, gpg_sig_header) && | |
1179 | line[gpg_sig_header_len] == ' ') { | |
1180 | sig_start = line; | |
1181 | sig_end = next; | |
1182 | in_signature = 1; | |
1183 | } else { | |
1184 | if (*line == '\n') | |
1185 | /* dump the whole remainder of the buffer */ | |
1186 | next = tail; | |
1187 | in_signature = 0; | |
1188 | } | |
1189 | line = next; | |
1190 | } | |
1191 | ||
1192 | if (sig_start) | |
1193 | strbuf_remove(buf, sig_start - buf->buf, sig_end - sig_start); | |
1194 | ||
1195 | return sig_start != NULL; | |
1196 | } | |
1197 | ||
5231c633 JH |
1198 | static void handle_signed_tag(struct commit *parent, struct commit_extra_header ***tail) |
1199 | { | |
1200 | struct merge_remote_desc *desc; | |
1201 | struct commit_extra_header *mergetag; | |
1202 | char *buf; | |
1203 | unsigned long size, len; | |
1204 | enum object_type type; | |
1205 | ||
1206 | desc = merge_remote_util(parent); | |
1207 | if (!desc || !desc->obj) | |
1208 | return; | |
ed1c9977 | 1209 | buf = read_sha1_file(desc->obj->oid.hash, &type, &size); |
5231c633 JH |
1210 | if (!buf || type != OBJ_TAG) |
1211 | goto free_return; | |
1212 | len = parse_signature(buf, size); | |
1213 | if (size == len) | |
1214 | goto free_return; | |
1215 | /* | |
1216 | * We could verify this signature and either omit the tag when | |
1217 | * it does not validate, but the integrator may not have the | |
1218 | * public key of the signer of the tag he is merging, while a | |
1219 | * later auditor may have it while auditing, so let's not run | |
1220 | * verify-signed-buffer here for now... | |
1221 | * | |
1222 | * if (verify_signed_buffer(buf, len, buf + len, size - len, ...)) | |
1223 | * warn("warning: signed tag unverified."); | |
1224 | */ | |
1225 | mergetag = xcalloc(1, sizeof(*mergetag)); | |
1226 | mergetag->key = xstrdup("mergetag"); | |
1227 | mergetag->value = buf; | |
1228 | mergetag->len = size; | |
1229 | ||
1230 | **tail = mergetag; | |
1231 | *tail = &mergetag->next; | |
1232 | return; | |
1233 | ||
1234 | free_return: | |
1235 | free(buf); | |
1236 | } | |
1237 | ||
434060ec | 1238 | int check_commit_signature(const struct commit *commit, struct signature_check *sigc) |
ffb6d7d5 SG |
1239 | { |
1240 | struct strbuf payload = STRBUF_INIT; | |
1241 | struct strbuf signature = STRBUF_INIT; | |
434060ec | 1242 | int ret = 1; |
ffb6d7d5 SG |
1243 | |
1244 | sigc->result = 'N'; | |
1245 | ||
218aa3a6 | 1246 | if (parse_signed_commit(commit, &payload, &signature) <= 0) |
ffb6d7d5 | 1247 | goto out; |
434060ec | 1248 | ret = check_signature(payload.buf, payload.len, signature.buf, |
1249 | signature.len, sigc); | |
ffb6d7d5 SG |
1250 | |
1251 | out: | |
ffb6d7d5 SG |
1252 | strbuf_release(&payload); |
1253 | strbuf_release(&signature); | |
434060ec | 1254 | |
1255 | return ret; | |
ffb6d7d5 SG |
1256 | } |
1257 | ||
1258 | ||
1259 | ||
5231c633 JH |
1260 | void append_merge_tag_headers(struct commit_list *parents, |
1261 | struct commit_extra_header ***tail) | |
1262 | { | |
1263 | while (parents) { | |
1264 | struct commit *parent = parents->item; | |
1265 | handle_signed_tag(parent, tail); | |
1266 | parents = parents->next; | |
1267 | } | |
1268 | } | |
1269 | ||
1270 | static void add_extra_header(struct strbuf *buffer, | |
1271 | struct commit_extra_header *extra) | |
1272 | { | |
1273 | strbuf_addstr(buffer, extra->key); | |
ed7a42a0 JH |
1274 | if (extra->len) |
1275 | strbuf_add_lines(buffer, " ", extra->value, extra->len); | |
1276 | else | |
1277 | strbuf_addch(buffer, '\n'); | |
1278 | } | |
1279 | ||
c871a1d1 JH |
1280 | struct commit_extra_header *read_commit_extra_headers(struct commit *commit, |
1281 | const char **exclude) | |
ed7a42a0 JH |
1282 | { |
1283 | struct commit_extra_header *extra = NULL; | |
1284 | unsigned long size; | |
218aa3a6 JK |
1285 | const char *buffer = get_commit_buffer(commit, &size); |
1286 | extra = read_commit_extra_header_lines(buffer, size, exclude); | |
1287 | unuse_commit_buffer(commit, buffer); | |
ed7a42a0 JH |
1288 | return extra; |
1289 | } | |
1290 | ||
063da62b CC |
1291 | void for_each_mergetag(each_mergetag_fn fn, struct commit *commit, void *data) |
1292 | { | |
1293 | struct commit_extra_header *extra, *to_free; | |
1294 | ||
1295 | to_free = read_commit_extra_headers(commit, NULL); | |
1296 | for (extra = to_free; extra; extra = extra->next) { | |
1297 | if (strcmp(extra->key, "mergetag")) | |
1298 | continue; /* not a merge tag */ | |
1299 | fn(commit, extra, data); | |
1300 | } | |
1301 | free_commit_extra_headers(to_free); | |
1302 | } | |
1303 | ||
ed7a42a0 JH |
1304 | static inline int standard_header_field(const char *field, size_t len) |
1305 | { | |
b072504c RS |
1306 | return ((len == 4 && !memcmp(field, "tree", 4)) || |
1307 | (len == 6 && !memcmp(field, "parent", 6)) || | |
1308 | (len == 6 && !memcmp(field, "author", 6)) || | |
1309 | (len == 9 && !memcmp(field, "committer", 9)) || | |
1310 | (len == 8 && !memcmp(field, "encoding", 8))); | |
ed7a42a0 JH |
1311 | } |
1312 | ||
c871a1d1 JH |
1313 | static int excluded_header_field(const char *field, size_t len, const char **exclude) |
1314 | { | |
1315 | if (!exclude) | |
1316 | return 0; | |
1317 | ||
1318 | while (*exclude) { | |
1319 | size_t xlen = strlen(*exclude); | |
b072504c | 1320 | if (len == xlen && !memcmp(field, *exclude, xlen)) |
c871a1d1 JH |
1321 | return 1; |
1322 | exclude++; | |
1323 | } | |
1324 | return 0; | |
1325 | } | |
1326 | ||
82a75299 JH |
1327 | static struct commit_extra_header *read_commit_extra_header_lines( |
1328 | const char *buffer, size_t size, | |
1329 | const char **exclude) | |
ed7a42a0 JH |
1330 | { |
1331 | struct commit_extra_header *extra = NULL, **tail = &extra, *it = NULL; | |
1332 | const char *line, *next, *eof, *eob; | |
1333 | struct strbuf buf = STRBUF_INIT; | |
1334 | ||
1335 | for (line = buffer, eob = line + size; | |
1336 | line < eob && *line != '\n'; | |
1337 | line = next) { | |
1338 | next = memchr(line, '\n', eob - line); | |
1339 | next = next ? next + 1 : eob; | |
1340 | if (*line == ' ') { | |
1341 | /* continuation */ | |
1342 | if (it) | |
1343 | strbuf_add(&buf, line + 1, next - (line + 1)); | |
1344 | continue; | |
1345 | } | |
1346 | if (it) | |
1347 | it->value = strbuf_detach(&buf, &it->len); | |
1348 | strbuf_reset(&buf); | |
1349 | it = NULL; | |
1350 | ||
50a01cc4 RS |
1351 | eof = memchr(line, ' ', next - line); |
1352 | if (!eof) | |
ed7a42a0 | 1353 | eof = next; |
b072504c RS |
1354 | else if (standard_header_field(line, eof - line) || |
1355 | excluded_header_field(line, eof - line, exclude)) | |
ed7a42a0 JH |
1356 | continue; |
1357 | ||
1358 | it = xcalloc(1, sizeof(*it)); | |
1359 | it->key = xmemdupz(line, eof-line); | |
1360 | *tail = it; | |
1361 | tail = &it->next; | |
1362 | if (eof + 1 < next) | |
1363 | strbuf_add(&buf, eof + 1, next - (eof + 1)); | |
1364 | } | |
1365 | if (it) | |
1366 | it->value = strbuf_detach(&buf, &it->len); | |
1367 | return extra; | |
5231c633 JH |
1368 | } |
1369 | ||
1370 | void free_commit_extra_headers(struct commit_extra_header *extra) | |
1371 | { | |
1372 | while (extra) { | |
1373 | struct commit_extra_header *next = extra->next; | |
1374 | free(extra->key); | |
1375 | free(extra->value); | |
1376 | free(extra); | |
1377 | extra = next; | |
1378 | } | |
1379 | } | |
1380 | ||
5078f344 PO |
1381 | int commit_tree(const char *msg, size_t msg_len, const struct object_id *tree, |
1382 | struct commit_list *parents, struct object_id *ret, | |
ba3c69a9 | 1383 | const char *author, const char *sign_commit) |
5231c633 JH |
1384 | { |
1385 | struct commit_extra_header *extra = NULL, **tail = &extra; | |
1386 | int result; | |
1387 | ||
1388 | append_merge_tag_headers(parents, &tail); | |
3ffefb54 | 1389 | result = commit_tree_extended(msg, msg_len, tree, parents, ret, |
ba3c69a9 | 1390 | author, sign_commit, extra); |
5231c633 JH |
1391 | free_commit_extra_headers(extra); |
1392 | return result; | |
1393 | } | |
1394 | ||
08a94a14 LT |
1395 | static int find_invalid_utf8(const char *buf, int len) |
1396 | { | |
1397 | int offset = 0; | |
e82bd6cc | 1398 | static const unsigned int max_codepoint[] = { |
1399 | 0x7f, 0x7ff, 0xffff, 0x10ffff | |
1400 | }; | |
08a94a14 LT |
1401 | |
1402 | while (len) { | |
1403 | unsigned char c = *buf++; | |
1404 | int bytes, bad_offset; | |
28110d4b | 1405 | unsigned int codepoint; |
e82bd6cc | 1406 | unsigned int min_val, max_val; |
08a94a14 LT |
1407 | |
1408 | len--; | |
1409 | offset++; | |
1410 | ||
1411 | /* Simple US-ASCII? No worries. */ | |
1412 | if (c < 0x80) | |
1413 | continue; | |
1414 | ||
1415 | bad_offset = offset-1; | |
1416 | ||
1417 | /* | |
1418 | * Count how many more high bits set: that's how | |
1419 | * many more bytes this sequence should have. | |
1420 | */ | |
1421 | bytes = 0; | |
1422 | while (c & 0x40) { | |
1423 | c <<= 1; | |
1424 | bytes++; | |
1425 | } | |
1426 | ||
28110d4b | 1427 | /* |
1428 | * Must be between 1 and 3 more bytes. Longer sequences result in | |
1429 | * codepoints beyond U+10FFFF, which are guaranteed never to exist. | |
1430 | */ | |
1431 | if (bytes < 1 || 3 < bytes) | |
08a94a14 LT |
1432 | return bad_offset; |
1433 | ||
1434 | /* Do we *have* that many bytes? */ | |
1435 | if (len < bytes) | |
1436 | return bad_offset; | |
1437 | ||
e82bd6cc | 1438 | /* |
1439 | * Place the encoded bits at the bottom of the value and compute the | |
1440 | * valid range. | |
1441 | */ | |
28110d4b | 1442 | codepoint = (c & 0x7f) >> bytes; |
e82bd6cc | 1443 | min_val = max_codepoint[bytes-1] + 1; |
1444 | max_val = max_codepoint[bytes]; | |
28110d4b | 1445 | |
08a94a14 LT |
1446 | offset += bytes; |
1447 | len -= bytes; | |
1448 | ||
1449 | /* And verify that they are good continuation bytes */ | |
1450 | do { | |
28110d4b | 1451 | codepoint <<= 6; |
1452 | codepoint |= *buf & 0x3f; | |
08a94a14 LT |
1453 | if ((*buf++ & 0xc0) != 0x80) |
1454 | return bad_offset; | |
1455 | } while (--bytes); | |
1456 | ||
e82bd6cc | 1457 | /* Reject codepoints that are out of range for the sequence length. */ |
1458 | if (codepoint < min_val || codepoint > max_val) | |
28110d4b | 1459 | return bad_offset; |
1460 | /* Surrogates are only for UTF-16 and cannot be encoded in UTF-8. */ | |
1461 | if ((codepoint & 0x1ff800) == 0xd800) | |
1462 | return bad_offset; | |
81050ac6 | 1463 | /* U+xxFFFE and U+xxFFFF are guaranteed non-characters. */ |
dc773a67 | 1464 | if ((codepoint & 0xfffe) == 0xfffe) |
81050ac6 PK |
1465 | return bad_offset; |
1466 | /* So are anything in the range U+FDD0..U+FDEF. */ | |
1467 | if (codepoint >= 0xfdd0 && codepoint <= 0xfdef) | |
28110d4b | 1468 | return bad_offset; |
08a94a14 LT |
1469 | } |
1470 | return -1; | |
1471 | } | |
1472 | ||
1473 | /* | |
1474 | * This verifies that the buffer is in proper utf8 format. | |
1475 | * | |
1476 | * If it isn't, it assumes any non-utf8 characters are Latin1, | |
1477 | * and does the conversion. | |
08a94a14 LT |
1478 | */ |
1479 | static int verify_utf8(struct strbuf *buf) | |
1480 | { | |
1481 | int ok = 1; | |
1482 | long pos = 0; | |
1483 | ||
1484 | for (;;) { | |
1485 | int bad; | |
1486 | unsigned char c; | |
1487 | unsigned char replace[2]; | |
1488 | ||
1489 | bad = find_invalid_utf8(buf->buf + pos, buf->len - pos); | |
1490 | if (bad < 0) | |
1491 | return ok; | |
1492 | pos += bad; | |
1493 | ok = 0; | |
1494 | c = buf->buf[pos]; | |
1495 | strbuf_remove(buf, pos, 1); | |
1496 | ||
1497 | /* We know 'c' must be in the range 128-255 */ | |
1498 | replace[0] = 0xc0 + (c >> 6); | |
1499 | replace[1] = 0x80 + (c & 0x3f); | |
1500 | strbuf_insert(buf, pos, replace, 2); | |
1501 | pos += 2; | |
1502 | } | |
1503 | } | |
1504 | ||
40d52ff7 | 1505 | static const char commit_utf8_warn[] = |
4fa4b315 VA |
1506 | N_("Warning: commit message did not conform to UTF-8.\n" |
1507 | "You may want to amend it after fixing the message, or set the config\n" | |
1508 | "variable i18n.commitencoding to the encoding your project uses.\n"); | |
40d52ff7 | 1509 | |
3ffefb54 | 1510 | int commit_tree_extended(const char *msg, size_t msg_len, |
5078f344 PO |
1511 | const struct object_id *tree, |
1512 | struct commit_list *parents, struct object_id *ret, | |
ba3c69a9 JH |
1513 | const char *author, const char *sign_commit, |
1514 | struct commit_extra_header *extra) | |
40d52ff7 JK |
1515 | { |
1516 | int result; | |
1517 | int encoding_is_utf8; | |
1518 | struct strbuf buffer; | |
1519 | ||
5078f344 | 1520 | assert_sha1_type(tree->hash, OBJ_TREE); |
40d52ff7 | 1521 | |
3ffefb54 | 1522 | if (memchr(msg, '\0', msg_len)) |
37576c14 NTND |
1523 | return error("a NUL byte in commit log message not allowed."); |
1524 | ||
40d52ff7 JK |
1525 | /* Not having i18n.commitencoding is the same as having utf-8 */ |
1526 | encoding_is_utf8 = is_encoding_utf8(git_commit_encoding); | |
1527 | ||
1528 | strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */ | |
5078f344 | 1529 | strbuf_addf(&buffer, "tree %s\n", oid_to_hex(tree)); |
40d52ff7 JK |
1530 | |
1531 | /* | |
1532 | * NOTE! This ordering means that the same exact tree merged with a | |
1533 | * different order of parents will be a _different_ changeset even | |
1534 | * if everything else stays the same. | |
1535 | */ | |
1536 | while (parents) { | |
e510ab89 | 1537 | struct commit *parent = pop_commit(&parents); |
40d52ff7 | 1538 | strbuf_addf(&buffer, "parent %s\n", |
f2fd0760 | 1539 | oid_to_hex(&parent->object.oid)); |
40d52ff7 JK |
1540 | } |
1541 | ||
1542 | /* Person/date information */ | |
1543 | if (!author) | |
f9bc573f | 1544 | author = git_author_info(IDENT_STRICT); |
40d52ff7 | 1545 | strbuf_addf(&buffer, "author %s\n", author); |
f9bc573f | 1546 | strbuf_addf(&buffer, "committer %s\n", git_committer_info(IDENT_STRICT)); |
40d52ff7 JK |
1547 | if (!encoding_is_utf8) |
1548 | strbuf_addf(&buffer, "encoding %s\n", git_commit_encoding); | |
5231c633 JH |
1549 | |
1550 | while (extra) { | |
1551 | add_extra_header(&buffer, extra); | |
1552 | extra = extra->next; | |
1553 | } | |
40d52ff7 JK |
1554 | strbuf_addch(&buffer, '\n'); |
1555 | ||
1556 | /* And add the comment */ | |
3ffefb54 | 1557 | strbuf_add(&buffer, msg, msg_len); |
40d52ff7 JK |
1558 | |
1559 | /* And check the encoding */ | |
08a94a14 | 1560 | if (encoding_is_utf8 && !verify_utf8(&buffer)) |
4fa4b315 | 1561 | fprintf(stderr, _(commit_utf8_warn)); |
40d52ff7 | 1562 | |
e505146d RS |
1563 | if (sign_commit && do_sign_commit(&buffer, sign_commit)) { |
1564 | result = -1; | |
1565 | goto out; | |
1566 | } | |
ba3c69a9 | 1567 | |
a09c985e | 1568 | result = write_object_file(buffer.buf, buffer.len, commit_type, ret); |
e505146d | 1569 | out: |
40d52ff7 JK |
1570 | strbuf_release(&buffer); |
1571 | return result; | |
1572 | } | |
ae8e4c9c | 1573 | |
beb518c9 RS |
1574 | void set_merge_remote_desc(struct commit *commit, |
1575 | const char *name, struct object *obj) | |
1576 | { | |
1577 | struct merge_remote_desc *desc; | |
5447a76a | 1578 | FLEX_ALLOC_STR(desc, name, name); |
beb518c9 | 1579 | desc->obj = obj; |
beb518c9 RS |
1580 | commit->util = desc; |
1581 | } | |
1582 | ||
ae8e4c9c JH |
1583 | struct commit *get_merge_parent(const char *name) |
1584 | { | |
1585 | struct object *obj; | |
1586 | struct commit *commit; | |
7683e2e6 | 1587 | struct object_id oid; |
e82caf38 | 1588 | if (get_oid(name, &oid)) |
ae8e4c9c | 1589 | return NULL; |
c251c83d | 1590 | obj = parse_object(&oid); |
ae8e4c9c | 1591 | commit = (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT); |
beb518c9 RS |
1592 | if (commit && !commit->util) |
1593 | set_merge_remote_desc(commit, name, obj); | |
ae8e4c9c JH |
1594 | return commit; |
1595 | } | |
89b5f1d9 RS |
1596 | |
1597 | /* | |
1598 | * Append a commit to the end of the commit_list. | |
1599 | * | |
1600 | * next starts by pointing to the variable that holds the head of an | |
1601 | * empty commit_list, and is updated to point to the "next" field of | |
1602 | * the last item on the list as new commits are appended. | |
1603 | * | |
1604 | * Usage example: | |
1605 | * | |
1606 | * struct commit_list *list; | |
1607 | * struct commit_list **next = &list; | |
1608 | * | |
1609 | * next = commit_list_append(c1, next); | |
1610 | * next = commit_list_append(c2, next); | |
1611 | * assert(commit_list_count(list) == 2); | |
1612 | * return list; | |
1613 | */ | |
1614 | struct commit_list **commit_list_append(struct commit *commit, | |
1615 | struct commit_list **next) | |
1616 | { | |
258c03eb BW |
1617 | struct commit_list *new_commit = xmalloc(sizeof(struct commit_list)); |
1618 | new_commit->item = commit; | |
1619 | *next = new_commit; | |
1620 | new_commit->next = NULL; | |
1621 | return &new_commit->next; | |
89b5f1d9 | 1622 | } |
efc7df45 | 1623 | |
fe6eb7f2 JK |
1624 | const char *find_commit_header(const char *msg, const char *key, size_t *out_len) |
1625 | { | |
1626 | int key_len = strlen(key); | |
1627 | const char *line = msg; | |
1628 | ||
1629 | while (line) { | |
1630 | const char *eol = strchrnul(line, '\n'); | |
1631 | ||
1632 | if (line == eol) | |
1633 | return NULL; | |
1634 | ||
1635 | if (eol - line > key_len && | |
1636 | !strncmp(line, key, key_len) && | |
1637 | line[key_len] == ' ') { | |
1638 | *out_len = eol - line - key_len - 1; | |
1639 | return line + key_len + 1; | |
1640 | } | |
1641 | line = *eol ? eol + 1 : NULL; | |
1642 | } | |
1643 | return NULL; | |
1644 | } | |
0ed8a4e1 | 1645 | |
8c384589 | 1646 | /* |
710714aa | 1647 | * Inspect the given string and determine the true "end" of the log message, in |
8c384589 | 1648 | * order to find where to put a new Signed-off-by: line. Ignored are |
d76650b8 BM |
1649 | * trailing comment lines and blank lines. To support "git commit -s |
1650 | * --amend" on an existing commit, we also ignore "Conflicts:". To | |
1651 | * support "git commit -v", we truncate at cut lines. | |
8c384589 CC |
1652 | * |
1653 | * Returns the number of bytes from the tail to ignore, to be fed as | |
1654 | * the second parameter to append_signoff(). | |
1655 | */ | |
710714aa | 1656 | int ignore_non_trailer(const char *buf, size_t len) |
8c384589 CC |
1657 | { |
1658 | int boc = 0; | |
1659 | int bol = 0; | |
1660 | int in_old_conflicts_block = 0; | |
d76650b8 | 1661 | size_t cutoff = wt_status_locate_end(buf, len); |
8c384589 | 1662 | |
d76650b8 | 1663 | while (bol < cutoff) { |
710714aa | 1664 | const char *next_line = memchr(buf + bol, '\n', len - bol); |
8c384589 | 1665 | |
710714aa JT |
1666 | if (!next_line) |
1667 | next_line = buf + len; | |
8c384589 CC |
1668 | else |
1669 | next_line++; | |
1670 | ||
710714aa | 1671 | if (buf[bol] == comment_line_char || buf[bol] == '\n') { |
8c384589 CC |
1672 | /* is this the first of the run of comments? */ |
1673 | if (!boc) | |
1674 | boc = bol; | |
1675 | /* otherwise, it is just continuing */ | |
710714aa | 1676 | } else if (starts_with(buf + bol, "Conflicts:\n")) { |
8c384589 CC |
1677 | in_old_conflicts_block = 1; |
1678 | if (!boc) | |
1679 | boc = bol; | |
710714aa | 1680 | } else if (in_old_conflicts_block && buf[bol] == '\t') { |
8c384589 CC |
1681 | ; /* a pathname in the conflicts block */ |
1682 | } else if (boc) { | |
1683 | /* the previous was not trailing comment */ | |
1684 | boc = 0; | |
1685 | in_old_conflicts_block = 0; | |
1686 | } | |
710714aa | 1687 | bol = next_line - buf; |
8c384589 | 1688 | } |
d76650b8 | 1689 | return boc ? len - boc : len - cutoff; |
8c384589 | 1690 | } |