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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" |
6a1a79fd | 5 | #include "repository.h" |
cbd53a21 | 6 | #include "object-store.h" |
ed09aef0 | 7 | #include "pkt-line.h" |
52883fbd | 8 | #include "utf8.h" |
199c45bf JH |
9 | #include "diff.h" |
10 | #include "revision.h" | |
a97a7468 | 11 | #include "notes.h" |
14ba97f8 | 12 | #include "alloc.h" |
ba3c69a9 | 13 | #include "gpg-interface.h" |
46905893 | 14 | #include "mergesort.h" |
a84b794a | 15 | #include "commit-slab.h" |
da24b104 | 16 | #include "prio-queue.h" |
0a9136f3 | 17 | #include "sha1-lookup.h" |
d76650b8 | 18 | #include "wt-status.h" |
f9f99b3f | 19 | #include "advice.h" |
175785e5 | 20 | |
82a75299 JH |
21 | static struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **); |
22 | ||
60ab26de LT |
23 | int save_commit_buffer = 1; |
24 | ||
175785e5 DB |
25 | const char *commit_type = "commit"; |
26 | ||
21e1ee8f SB |
27 | struct commit *lookup_commit_reference_gently_the_repository( |
28 | const struct object_id *oid, int quiet) | |
961784ee | 29 | { |
109cd76d SB |
30 | struct object *obj = deref_tag(parse_object(the_repository, oid), |
31 | NULL, 0); | |
961784ee LT |
32 | |
33 | if (!obj) | |
34 | return NULL; | |
1268dfac | 35 | return object_as_type(the_repository, obj, OBJ_COMMIT, quiet); |
f76412ed JH |
36 | } |
37 | ||
2122f675 | 38 | struct commit *lookup_commit_reference_the_repository(const struct object_id *oid) |
f76412ed | 39 | { |
21e1ee8f | 40 | return lookup_commit_reference_gently(the_repository, oid, 0); |
961784ee LT |
41 | } |
42 | ||
bc83266a | 43 | struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref_name) |
baf18fc2 | 44 | { |
2122f675 | 45 | struct commit *c = lookup_commit_reference(the_repository, oid); |
baf18fc2 NTND |
46 | if (!c) |
47 | die(_("could not parse %s"), ref_name); | |
bc83266a | 48 | if (oidcmp(oid, &c->object.oid)) { |
baf18fc2 | 49 | warning(_("%s %s is not a commit!"), |
bc83266a | 50 | ref_name, oid_to_hex(oid)); |
baf18fc2 NTND |
51 | } |
52 | return c; | |
53 | } | |
54 | ||
c1f5eb49 | 55 | struct commit *lookup_commit_the_repository(const struct object_id *oid) |
175785e5 | 56 | { |
5abddd1e | 57 | struct object *obj = lookup_object(the_repository, oid->hash); |
d36f51c1 | 58 | if (!obj) |
68f95d38 | 59 | return create_object(the_repository, oid->hash, |
8ba0e5ec | 60 | alloc_commit_node(the_repository)); |
1268dfac | 61 | return object_as_type(the_repository, obj, OBJ_COMMIT, 0); |
175785e5 DB |
62 | } |
63 | ||
a6fa5992 PN |
64 | struct commit *lookup_commit_reference_by_name(const char *name) |
65 | { | |
7683e2e6 | 66 | struct object_id oid; |
a6fa5992 PN |
67 | struct commit *commit; |
68 | ||
e82caf38 | 69 | if (get_oid_committish(name, &oid)) |
a6fa5992 | 70 | return NULL; |
2122f675 | 71 | commit = lookup_commit_reference(the_repository, &oid); |
5e7d4d3e | 72 | if (parse_commit(commit)) |
a6fa5992 PN |
73 | return NULL; |
74 | return commit; | |
75 | } | |
76 | ||
dddbad72 | 77 | static timestamp_t parse_commit_date(const char *buf, const char *tail) |
175785e5 | 78 | { |
0a617799 | 79 | const char *dateptr; |
175785e5 | 80 | |
0a617799 MK |
81 | if (buf + 6 >= tail) |
82 | return 0; | |
175785e5 DB |
83 | if (memcmp(buf, "author", 6)) |
84 | return 0; | |
0a617799 | 85 | while (buf < tail && *buf++ != '\n') |
175785e5 | 86 | /* nada */; |
0a617799 MK |
87 | if (buf + 9 >= tail) |
88 | return 0; | |
175785e5 DB |
89 | if (memcmp(buf, "committer", 9)) |
90 | return 0; | |
0a617799 | 91 | while (buf < tail && *buf++ != '>') |
175785e5 | 92 | /* nada */; |
0a617799 MK |
93 | if (buf >= tail) |
94 | return 0; | |
95 | dateptr = buf; | |
96 | while (buf < tail && *buf++ != '\n') | |
97 | /* nada */; | |
98 | if (buf >= tail) | |
99 | return 0; | |
1aeb7e75 JS |
100 | /* dateptr < buf && buf[-1] == '\n', so parsing will stop at buf-1 */ |
101 | return parse_timestamp(dateptr, NULL, 10); | |
175785e5 DB |
102 | } |
103 | ||
0a9136f3 DD |
104 | static const unsigned char *commit_graft_sha1_access(size_t index, void *table) |
105 | { | |
106 | struct commit_graft **commit_graft_table = table; | |
7683e2e6 | 107 | return commit_graft_table[index]->oid.hash; |
0a9136f3 DD |
108 | } |
109 | ||
e808656c | 110 | static int commit_graft_pos(struct repository *r, const unsigned char *sha1) |
5da5c8f4 | 111 | { |
e808656c BW |
112 | return sha1_pos(sha1, r->parsed_objects->grafts, |
113 | r->parsed_objects->grafts_nr, | |
0a9136f3 | 114 | commit_graft_sha1_access); |
5da5c8f4 JH |
115 | } |
116 | ||
a3b78e83 BW |
117 | int register_commit_graft(struct repository *r, struct commit_graft *graft, |
118 | int ignore_dups) | |
5040f17e | 119 | { |
a3b78e83 | 120 | int pos = commit_graft_pos(r, graft->oid.hash); |
a6080a0a | 121 | |
5040f17e JH |
122 | if (0 <= pos) { |
123 | if (ignore_dups) | |
124 | free(graft); | |
125 | else { | |
a3b78e83 BW |
126 | free(r->parsed_objects->grafts[pos]); |
127 | r->parsed_objects->grafts[pos] = graft; | |
5040f17e JH |
128 | } |
129 | return 1; | |
130 | } | |
131 | pos = -pos - 1; | |
a3b78e83 BW |
132 | ALLOC_GROW(r->parsed_objects->grafts, |
133 | r->parsed_objects->grafts_nr + 1, | |
134 | r->parsed_objects->grafts_alloc); | |
135 | r->parsed_objects->grafts_nr++; | |
136 | if (pos < r->parsed_objects->grafts_nr) | |
137 | memmove(r->parsed_objects->grafts + pos + 1, | |
138 | r->parsed_objects->grafts + pos, | |
139 | (r->parsed_objects->grafts_nr - pos - 1) * | |
140 | sizeof(*r->parsed_objects->grafts)); | |
141 | r->parsed_objects->grafts[pos] = graft; | |
5040f17e JH |
142 | return 0; |
143 | } | |
144 | ||
9a934032 | 145 | struct commit_graft *read_graft_line(struct strbuf *line) |
5040f17e JH |
146 | { |
147 | /* The format is just "Commit Parent1 Parent2 ...\n" */ | |
cfa5bf16 PO |
148 | int i, phase; |
149 | const char *tail = NULL; | |
5040f17e | 150 | struct commit_graft *graft = NULL; |
cfa5bf16 | 151 | struct object_id dummy_oid, *oid; |
5040f17e | 152 | |
9a934032 PO |
153 | strbuf_rtrim(line); |
154 | if (!line->len || line->buf[0] == '#') | |
5bc4ce58 | 155 | return NULL; |
cfa5bf16 PO |
156 | /* |
157 | * phase 0 verifies line, counts hashes in line and allocates graft | |
158 | * phase 1 fills graft | |
159 | */ | |
160 | for (phase = 0; phase < 2; phase++) { | |
161 | oid = graft ? &graft->oid : &dummy_oid; | |
162 | if (parse_oid_hex(line->buf, oid, &tail)) | |
5040f17e | 163 | goto bad_graft_data; |
cfa5bf16 PO |
164 | for (i = 0; *tail != '\0'; i++) { |
165 | oid = graft ? &graft->parent[i] : &dummy_oid; | |
166 | if (!isspace(*tail++) || parse_oid_hex(tail, oid, &tail)) | |
167 | goto bad_graft_data; | |
168 | } | |
169 | if (!graft) { | |
170 | graft = xmalloc(st_add(sizeof(*graft), | |
171 | st_mult(sizeof(struct object_id), i))); | |
172 | graft->nr_parent = i; | |
173 | } | |
5040f17e JH |
174 | } |
175 | return graft; | |
df5d43be RT |
176 | |
177 | bad_graft_data: | |
9a934032 | 178 | error("bad graft data: %s", line->buf); |
cfa5bf16 | 179 | assert(!graft); |
df5d43be | 180 | return NULL; |
5040f17e JH |
181 | } |
182 | ||
d0e5dd0e | 183 | static int read_graft_file(struct repository *r, const char *graft_file) |
5da5c8f4 | 184 | { |
e9d983f1 | 185 | FILE *fp = fopen_or_warn(graft_file, "r"); |
e228c173 | 186 | struct strbuf buf = STRBUF_INIT; |
5040f17e JH |
187 | if (!fp) |
188 | return -1; | |
f9f99b3f JS |
189 | if (advice_graft_file_deprecated) |
190 | advise(_("Support for <GIT_DIR>/info/grafts is deprecated\n" | |
191 | "and will be removed in a future Git version.\n" | |
192 | "\n" | |
193 | "Please use \"git replace --convert-graft-file\"\n" | |
194 | "to convert the grafts into replace refs.\n" | |
195 | "\n" | |
196 | "Turn this message off by running\n" | |
197 | "\"git config advice.graftFileDeprecated false\"")); | |
e228c173 | 198 | while (!strbuf_getwholeline(&buf, fp, '\n')) { |
5da5c8f4 | 199 | /* The format is just "Commit Parent1 Parent2 ...\n" */ |
9a934032 | 200 | struct commit_graft *graft = read_graft_line(&buf); |
5bc4ce58 JH |
201 | if (!graft) |
202 | continue; | |
d0e5dd0e | 203 | if (register_commit_graft(r, graft, 1)) |
e228c173 | 204 | error("duplicate graft data: %s", buf.buf); |
5da5c8f4 JH |
205 | } |
206 | fclose(fp); | |
e228c173 | 207 | strbuf_release(&buf); |
5040f17e JH |
208 | return 0; |
209 | } | |
210 | ||
2f6c767f | 211 | static void prepare_commit_graft(struct repository *r) |
5040f17e | 212 | { |
5040f17e JH |
213 | char *graft_file; |
214 | ||
2f6c767f | 215 | if (r->parsed_objects->commit_graft_prepared) |
5040f17e | 216 | return; |
14a9bd28 JK |
217 | if (!startup_info->have_repository) |
218 | return; | |
219 | ||
2f6c767f SB |
220 | graft_file = get_graft_file(r); |
221 | read_graft_file(r, graft_file); | |
ed09aef0 | 222 | /* make sure shallows are read */ |
2f6c767f SB |
223 | is_repository_shallow(r); |
224 | r->parsed_objects->commit_graft_prepared = 1; | |
5da5c8f4 JH |
225 | } |
226 | ||
b9dbddf6 | 227 | struct commit_graft *lookup_commit_graft(struct repository *r, const struct object_id *oid) |
5da5c8f4 JH |
228 | { |
229 | int pos; | |
b9dbddf6 SB |
230 | prepare_commit_graft(r); |
231 | pos = commit_graft_pos(r, oid->hash); | |
5da5c8f4 JH |
232 | if (pos < 0) |
233 | return NULL; | |
b9dbddf6 | 234 | return r->parsed_objects->grafts[pos]; |
5da5c8f4 JH |
235 | } |
236 | ||
09d46644 | 237 | int for_each_commit_graft(each_commit_graft_fn fn, void *cb_data) |
ed09aef0 | 238 | { |
09d46644 | 239 | int i, ret; |
6a1a79fd JN |
240 | for (i = ret = 0; i < the_repository->parsed_objects->grafts_nr && !ret; i++) |
241 | ret = fn(the_repository->parsed_objects->grafts[i], cb_data); | |
09d46644 | 242 | return ret; |
ed09aef0 JS |
243 | } |
244 | ||
e92b848c | 245 | int unregister_shallow(const struct object_id *oid) |
f53514bc | 246 | { |
be479e80 | 247 | int pos = commit_graft_pos(the_repository, oid->hash); |
f53514bc JS |
248 | if (pos < 0) |
249 | return -1; | |
6a1a79fd JN |
250 | if (pos + 1 < the_repository->parsed_objects->grafts_nr) |
251 | MOVE_ARRAY(the_repository->parsed_objects->grafts + pos, | |
252 | the_repository->parsed_objects->grafts + pos + 1, | |
253 | the_repository->parsed_objects->grafts_nr - pos - 1); | |
254 | the_repository->parsed_objects->grafts_nr--; | |
f53514bc JS |
255 | return 0; |
256 | } | |
257 | ||
8597ea3a JK |
258 | struct commit_buffer { |
259 | void *buffer; | |
260 | unsigned long size; | |
261 | }; | |
262 | define_commit_slab(buffer_slab, struct commit_buffer); | |
c1b3c71f JK |
263 | static struct buffer_slab buffer_slab = COMMIT_SLAB_INIT(1, buffer_slab); |
264 | ||
5e0c6360 | 265 | void set_commit_buffer_the_repository(struct commit *commit, void *buffer, unsigned long size) |
66c2827e | 266 | { |
8597ea3a JK |
267 | struct commit_buffer *v = buffer_slab_at(&buffer_slab, commit); |
268 | v->buffer = buffer; | |
269 | v->size = size; | |
66c2827e JK |
270 | } |
271 | ||
8597ea3a | 272 | const void *get_cached_commit_buffer(const struct commit *commit, unsigned long *sizep) |
152ff1cc | 273 | { |
862e730e JH |
274 | struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); |
275 | if (!v) { | |
276 | if (sizep) | |
277 | *sizep = 0; | |
278 | return NULL; | |
279 | } | |
8597ea3a JK |
280 | if (sizep) |
281 | *sizep = v->size; | |
282 | return v->buffer; | |
152ff1cc JK |
283 | } |
284 | ||
8597ea3a | 285 | const void *get_commit_buffer(const struct commit *commit, unsigned long *sizep) |
152ff1cc | 286 | { |
8597ea3a | 287 | const void *ret = get_cached_commit_buffer(commit, sizep); |
152ff1cc JK |
288 | if (!ret) { |
289 | enum object_type type; | |
290 | unsigned long size; | |
b4f5aca4 | 291 | ret = read_object_file(&commit->object.oid, &type, &size); |
152ff1cc JK |
292 | if (!ret) |
293 | die("cannot read commit object %s", | |
f2fd0760 | 294 | oid_to_hex(&commit->object.oid)); |
152ff1cc JK |
295 | if (type != OBJ_COMMIT) |
296 | die("expected commit for %s, got %s", | |
debca9d2 | 297 | oid_to_hex(&commit->object.oid), type_name(type)); |
8597ea3a JK |
298 | if (sizep) |
299 | *sizep = size; | |
152ff1cc JK |
300 | } |
301 | return ret; | |
302 | } | |
303 | ||
304 | void unuse_commit_buffer(const struct commit *commit, const void *buffer) | |
305 | { | |
862e730e JH |
306 | struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); |
307 | if (!(v && v->buffer == buffer)) | |
152ff1cc JK |
308 | free((void *)buffer); |
309 | } | |
310 | ||
0fb370da JK |
311 | void free_commit_buffer(struct commit *commit) |
312 | { | |
862e730e JH |
313 | struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); |
314 | if (v) { | |
6a83d902 | 315 | FREE_AND_NULL(v->buffer); |
862e730e JH |
316 | v->size = 0; |
317 | } | |
0fb370da JK |
318 | } |
319 | ||
5bb03de1 DS |
320 | struct tree *get_commit_tree(const struct commit *commit) |
321 | { | |
7b8a21db DS |
322 | if (commit->maybe_tree || !commit->object.parsed) |
323 | return commit->maybe_tree; | |
324 | ||
325 | if (commit->graph_pos == COMMIT_NOT_FROM_GRAPH) | |
326 | BUG("commit has NULL tree, but was not loaded from commit-graph"); | |
327 | ||
328 | return get_commit_tree_in_graph(commit); | |
5bb03de1 DS |
329 | } |
330 | ||
331 | struct object_id *get_commit_tree_oid(const struct commit *commit) | |
332 | { | |
333 | return &get_commit_tree(commit)->object.oid; | |
334 | } | |
335 | ||
14ba97f8 SB |
336 | void release_commit_memory(struct commit *c) |
337 | { | |
11024058 | 338 | c->maybe_tree = NULL; |
14ba97f8 SB |
339 | c->index = 0; |
340 | free_commit_buffer(c); | |
341 | free_commit_list(c->parents); | |
342 | /* TODO: what about commit->util? */ | |
343 | ||
344 | c->object.parsed = 0; | |
345 | } | |
346 | ||
8597ea3a | 347 | const void *detach_commit_buffer(struct commit *commit, unsigned long *sizep) |
0fb370da | 348 | { |
862e730e | 349 | struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); |
8597ea3a JK |
350 | void *ret; |
351 | ||
862e730e JH |
352 | if (!v) { |
353 | if (sizep) | |
354 | *sizep = 0; | |
355 | return NULL; | |
356 | } | |
8597ea3a JK |
357 | ret = v->buffer; |
358 | if (sizep) | |
359 | *sizep = v->size; | |
360 | ||
361 | v->buffer = NULL; | |
362 | v->size = 0; | |
0fb370da JK |
363 | return ret; |
364 | } | |
365 | ||
08f4f445 | 366 | int parse_commit_buffer_the_repository(struct commit *item, const void *buffer, unsigned long size, int check_graph) |
175785e5 | 367 | { |
cf7b1cad NTND |
368 | const char *tail = buffer; |
369 | const char *bufptr = buffer; | |
7683e2e6 | 370 | struct object_id parent; |
6c88be16 | 371 | struct commit_list **pptr; |
5da5c8f4 | 372 | struct commit_graft *graft; |
7683e2e6 | 373 | const int tree_entry_len = GIT_SHA1_HEXSZ + 5; |
374 | const int parent_entry_len = GIT_SHA1_HEXSZ + 7; | |
bd2c39f5 | 375 | |
175785e5 DB |
376 | if (item->object.parsed) |
377 | return 0; | |
378 | item->object.parsed = 1; | |
3b44f15a | 379 | tail += size; |
7683e2e6 | 380 | if (tail <= bufptr + tree_entry_len + 1 || memcmp(bufptr, "tree ", 5) || |
381 | bufptr[tree_entry_len] != '\n') | |
f2fd0760 | 382 | return error("bogus commit object %s", oid_to_hex(&item->object.oid)); |
26ea3e7d | 383 | if (get_oid_hex(bufptr + 5, &parent) < 0) |
bd2afde8 | 384 | return error("bad tree pointer in commit %s", |
f2fd0760 | 385 | oid_to_hex(&item->object.oid)); |
f86bcc7b | 386 | item->maybe_tree = lookup_tree(the_repository, &parent); |
7683e2e6 | 387 | bufptr += tree_entry_len + 1; /* "tree " + "hex sha1" + "\n" */ |
6c88be16 | 388 | pptr = &item->parents; |
5da5c8f4 | 389 | |
1f93ecd1 | 390 | graft = lookup_commit_graft(the_repository, &item->object.oid); |
7683e2e6 | 391 | while (bufptr + parent_entry_len < tail && !memcmp(bufptr, "parent ", 7)) { |
f7cc77d7 LT |
392 | struct commit *new_parent; |
393 | ||
7683e2e6 | 394 | if (tail <= bufptr + parent_entry_len + 1 || |
26ea3e7d | 395 | get_oid_hex(bufptr + 7, &parent) || |
7683e2e6 | 396 | bufptr[parent_entry_len] != '\n') |
f2fd0760 | 397 | return error("bad parents in commit %s", oid_to_hex(&item->object.oid)); |
7683e2e6 | 398 | bufptr += parent_entry_len + 1; |
7f3140cd JS |
399 | /* |
400 | * The clone is shallow if nr_parent < 0, and we must | |
401 | * not traverse its real parents even when we unhide them. | |
402 | */ | |
403 | if (graft && (graft->nr_parent < 0 || grafts_replace_parents)) | |
5da5c8f4 | 404 | continue; |
c1f5eb49 | 405 | new_parent = lookup_commit(the_repository, &parent); |
39468def | 406 | if (new_parent) |
6c88be16 | 407 | pptr = &commit_list_insert(new_parent, pptr)->next; |
5da5c8f4 JH |
408 | } |
409 | if (graft) { | |
410 | int i; | |
411 | struct commit *new_parent; | |
412 | for (i = 0; i < graft->nr_parent; i++) { | |
c1f5eb49 SB |
413 | new_parent = lookup_commit(the_repository, |
414 | &graft->parent[i]); | |
5da5c8f4 JH |
415 | if (!new_parent) |
416 | continue; | |
417 | pptr = &commit_list_insert(new_parent, pptr)->next; | |
5da5c8f4 | 418 | } |
175785e5 | 419 | } |
0a617799 | 420 | item->date = parse_commit_date(bufptr, tail); |
27dedf0c | 421 | |
e2838d85 DS |
422 | if (check_graph) |
423 | load_commit_graph_info(item); | |
424 | ||
175785e5 DB |
425 | return 0; |
426 | } | |
427 | ||
9cc2b07a | 428 | int parse_commit_gently(struct commit *item, int quiet_on_missing) |
bd2c39f5 | 429 | { |
21666f1a | 430 | enum object_type type; |
bd2c39f5 NP |
431 | void *buffer; |
432 | unsigned long size; | |
433 | int ret; | |
434 | ||
9786f68b MK |
435 | if (!item) |
436 | return -1; | |
bd2c39f5 NP |
437 | if (item->object.parsed) |
438 | return 0; | |
177722b3 DS |
439 | if (parse_commit_in_graph(item)) |
440 | return 0; | |
b4f5aca4 | 441 | buffer = read_object_file(&item->object.oid, &type, &size); |
bd2c39f5 | 442 | if (!buffer) |
9cc2b07a JK |
443 | return quiet_on_missing ? -1 : |
444 | error("Could not read %s", | |
f2fd0760 | 445 | oid_to_hex(&item->object.oid)); |
21666f1a | 446 | if (type != OBJ_COMMIT) { |
bd2c39f5 NP |
447 | free(buffer); |
448 | return error("Object %s not a commit", | |
f2fd0760 | 449 | oid_to_hex(&item->object.oid)); |
bd2c39f5 | 450 | } |
08f4f445 | 451 | ret = parse_commit_buffer(the_repository, item, buffer, size, 0); |
60ab26de | 452 | if (save_commit_buffer && !ret) { |
5e0c6360 | 453 | set_commit_buffer(the_repository, item, buffer, size); |
3ff1fbbb LT |
454 | return 0; |
455 | } | |
bd2c39f5 NP |
456 | free(buffer); |
457 | return ret; | |
458 | } | |
459 | ||
7059dccc JK |
460 | void parse_commit_or_die(struct commit *item) |
461 | { | |
462 | if (parse_commit(item)) | |
463 | die("unable to parse commit %s", | |
f2fd0760 | 464 | item ? oid_to_hex(&item->object.oid) : "(null)"); |
7059dccc JK |
465 | } |
466 | ||
11af2aae CC |
467 | int find_commit_subject(const char *commit_buffer, const char **subject) |
468 | { | |
469 | const char *eol; | |
470 | const char *p = commit_buffer; | |
471 | ||
472 | while (*p && (*p != '\n' || p[1] != '\n')) | |
473 | p++; | |
474 | if (*p) { | |
4e1b06da | 475 | p = skip_blank_lines(p + 2); |
9c9b03b1 | 476 | eol = strchrnul(p, '\n'); |
11af2aae CC |
477 | } else |
478 | eol = p; | |
479 | ||
480 | *subject = p; | |
481 | ||
482 | return eol - p; | |
483 | } | |
484 | ||
ac5155ef | 485 | struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p) |
dd97f850 | 486 | { |
812666c8 | 487 | struct commit_list *new_list = xmalloc(sizeof(struct commit_list)); |
dd97f850 DB |
488 | new_list->item = item; |
489 | new_list->next = *list_p; | |
490 | *list_p = new_list; | |
ac5155ef | 491 | return new_list; |
dd97f850 DB |
492 | } |
493 | ||
65319475 MV |
494 | unsigned commit_list_count(const struct commit_list *l) |
495 | { | |
496 | unsigned c = 0; | |
497 | for (; l; l = l->next ) | |
498 | c++; | |
499 | return c; | |
500 | } | |
501 | ||
53d00b39 TR |
502 | struct commit_list *copy_commit_list(struct commit_list *list) |
503 | { | |
504 | struct commit_list *head = NULL; | |
505 | struct commit_list **pp = &head; | |
506 | while (list) { | |
cb979dbd | 507 | pp = commit_list_append(list->item, pp); |
53d00b39 TR |
508 | list = list->next; |
509 | } | |
510 | return head; | |
511 | } | |
512 | ||
175785e5 DB |
513 | void free_commit_list(struct commit_list *list) |
514 | { | |
e510ab89 RS |
515 | while (list) |
516 | pop_commit(&list); | |
175785e5 | 517 | } |
dd97f850 | 518 | |
47e44ed1 | 519 | struct commit_list * commit_list_insert_by_date(struct commit *item, struct commit_list **list) |
dd97f850 DB |
520 | { |
521 | struct commit_list **pp = list; | |
522 | struct commit_list *p; | |
523 | while ((p = *pp) != NULL) { | |
524 | if (p->item->date < item->date) { | |
525 | break; | |
526 | } | |
527 | pp = &p->next; | |
528 | } | |
f755494c | 529 | return commit_list_insert(item, pp); |
dd97f850 DB |
530 | } |
531 | ||
46905893 RS |
532 | static int commit_list_compare_by_date(const void *a, const void *b) |
533 | { | |
dddbad72 JS |
534 | timestamp_t a_date = ((const struct commit_list *)a)->item->date; |
535 | timestamp_t b_date = ((const struct commit_list *)b)->item->date; | |
46905893 RS |
536 | if (a_date < b_date) |
537 | return 1; | |
538 | if (a_date > b_date) | |
539 | return -1; | |
540 | return 0; | |
541 | } | |
542 | ||
543 | static void *commit_list_get_next(const void *a) | |
544 | { | |
545 | return ((const struct commit_list *)a)->next; | |
546 | } | |
547 | ||
548 | static void commit_list_set_next(void *a, void *next) | |
549 | { | |
550 | ((struct commit_list *)a)->next = next; | |
551 | } | |
a6080a0a | 552 | |
47e44ed1 | 553 | void commit_list_sort_by_date(struct commit_list **list) |
dd97f850 | 554 | { |
7365c95d JH |
555 | *list = llist_mergesort(*list, commit_list_get_next, commit_list_set_next, |
556 | commit_list_compare_by_date); | |
dd97f850 DB |
557 | } |
558 | ||
58e28af6 DB |
559 | struct commit *pop_most_recent_commit(struct commit_list **list, |
560 | unsigned int mark) | |
dd97f850 | 561 | { |
e510ab89 | 562 | struct commit *ret = pop_commit(list); |
dd97f850 | 563 | struct commit_list *parents = ret->parents; |
dd97f850 DB |
564 | |
565 | while (parents) { | |
4056c091 | 566 | struct commit *commit = parents->item; |
dec38c81 | 567 | if (!parse_commit(commit) && !(commit->object.flags & mark)) { |
58e28af6 | 568 | commit->object.flags |= mark; |
47e44ed1 | 569 | commit_list_insert_by_date(commit, list); |
4056c091 | 570 | } |
dd97f850 DB |
571 | parents = parents->next; |
572 | } | |
573 | return ret; | |
574 | } | |
e3bc7a3b | 575 | |
941ba8db NTND |
576 | static void clear_commit_marks_1(struct commit_list **plist, |
577 | struct commit *commit, unsigned int mark) | |
f8f9c73c | 578 | { |
60fcc2e6 JS |
579 | while (commit) { |
580 | struct commit_list *parents; | |
f8f9c73c | 581 | |
60fcc2e6 JS |
582 | if (!(mark & commit->object.flags)) |
583 | return; | |
58ecf5c1 | 584 | |
60fcc2e6 JS |
585 | commit->object.flags &= ~mark; |
586 | ||
587 | parents = commit->parents; | |
588 | if (!parents) | |
589 | return; | |
590 | ||
591 | while ((parents = parents->next)) | |
941ba8db | 592 | commit_list_insert(parents->item, plist); |
60fcc2e6 JS |
593 | |
594 | commit = commit->parents->item; | |
f8f9c73c JH |
595 | } |
596 | } | |
597 | ||
e895cb51 | 598 | void clear_commit_marks_many(int nr, struct commit **commit, unsigned int mark) |
941ba8db NTND |
599 | { |
600 | struct commit_list *list = NULL; | |
e895cb51 JH |
601 | |
602 | while (nr--) { | |
07f7d55a | 603 | clear_commit_marks_1(&list, *commit, mark); |
e895cb51 JH |
604 | commit++; |
605 | } | |
941ba8db NTND |
606 | while (list) |
607 | clear_commit_marks_1(&list, pop_commit(&list), mark); | |
608 | } | |
609 | ||
e895cb51 JH |
610 | void clear_commit_marks(struct commit *commit, unsigned int mark) |
611 | { | |
612 | clear_commit_marks_many(1, &commit, mark); | |
613 | } | |
614 | ||
a3437b8c JS |
615 | struct commit *pop_commit(struct commit_list **stack) |
616 | { | |
617 | struct commit_list *top = *stack; | |
618 | struct commit *item = top ? top->item : NULL; | |
619 | ||
620 | if (top) { | |
621 | *stack = top->next; | |
622 | free(top); | |
623 | } | |
624 | return item; | |
625 | } | |
626 | ||
a84b794a JH |
627 | /* |
628 | * Topological sort support | |
629 | */ | |
96c4f4a3 | 630 | |
a84b794a JH |
631 | /* count number of children that have not been emitted */ |
632 | define_commit_slab(indegree_slab, int); | |
96c4f4a3 | 633 | |
81c6b38b JH |
634 | /* record author-date for each commit object */ |
635 | define_commit_slab(author_date_slab, unsigned long); | |
636 | ||
637 | static void record_author_date(struct author_date_slab *author_date, | |
638 | struct commit *commit) | |
639 | { | |
8597ea3a | 640 | const char *buffer = get_commit_buffer(commit, NULL); |
81c6b38b | 641 | struct ident_split ident; |
ea5517f0 JK |
642 | const char *ident_line; |
643 | size_t ident_len; | |
81c6b38b | 644 | char *date_end; |
dddbad72 | 645 | timestamp_t date; |
81c6b38b | 646 | |
ea5517f0 JK |
647 | ident_line = find_commit_header(buffer, "author", &ident_len); |
648 | if (!ident_line) | |
649 | goto fail_exit; /* no author line */ | |
650 | if (split_ident_line(&ident, ident_line, ident_len) || | |
651 | !ident.date_begin || !ident.date_end) | |
652 | goto fail_exit; /* malformed "author" line */ | |
81c6b38b | 653 | |
1aeb7e75 | 654 | date = parse_timestamp(ident.date_begin, &date_end, 10); |
81c6b38b JH |
655 | if (date_end != ident.date_end) |
656 | goto fail_exit; /* malformed date */ | |
657 | *(author_date_slab_at(author_date, commit)) = date; | |
658 | ||
659 | fail_exit: | |
ba41c1c9 | 660 | unuse_commit_buffer(commit, buffer); |
81c6b38b JH |
661 | } |
662 | ||
663 | static int compare_commits_by_author_date(const void *a_, const void *b_, | |
664 | void *cb_data) | |
665 | { | |
666 | const struct commit *a = a_, *b = b_; | |
667 | struct author_date_slab *author_date = cb_data; | |
dddbad72 JS |
668 | timestamp_t a_date = *(author_date_slab_at(author_date, a)); |
669 | timestamp_t b_date = *(author_date_slab_at(author_date, b)); | |
81c6b38b JH |
670 | |
671 | /* newer commits with larger date first */ | |
672 | if (a_date < b_date) | |
673 | return 1; | |
674 | else if (a_date > b_date) | |
675 | return -1; | |
676 | return 0; | |
677 | } | |
678 | ||
3afc679b DS |
679 | int compare_commits_by_gen_then_commit_date(const void *a_, const void *b_, void *unused) |
680 | { | |
681 | const struct commit *a = a_, *b = b_; | |
682 | ||
683 | /* newer commits first */ | |
684 | if (a->generation < b->generation) | |
685 | return 1; | |
686 | else if (a->generation > b->generation) | |
687 | return -1; | |
688 | ||
689 | /* use date as a heuristic when generations are equal */ | |
690 | if (a->date < b->date) | |
691 | return 1; | |
692 | else if (a->date > b->date) | |
693 | return -1; | |
694 | return 0; | |
695 | } | |
696 | ||
727377ff | 697 | int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused) |
da24b104 JH |
698 | { |
699 | const struct commit *a = a_, *b = b_; | |
700 | /* newer commits with larger date first */ | |
701 | if (a->date < b->date) | |
702 | return 1; | |
703 | else if (a->date > b->date) | |
704 | return -1; | |
705 | return 0; | |
706 | } | |
707 | ||
ab580ace JS |
708 | /* |
709 | * Performs an in-place topological sort on the list supplied. | |
710 | */ | |
da24b104 | 711 | void sort_in_topological_order(struct commit_list **list, enum rev_sort_order sort_order) |
6b6dcfc2 | 712 | { |
23c17d4a | 713 | struct commit_list *next, *orig = *list; |
23c17d4a | 714 | struct commit_list **pptr; |
a84b794a | 715 | struct indegree_slab indegree; |
da24b104 JH |
716 | struct prio_queue queue; |
717 | struct commit *commit; | |
81c6b38b | 718 | struct author_date_slab author_date; |
a6080a0a | 719 | |
23c17d4a | 720 | if (!orig) |
7d6fb370 | 721 | return; |
23c17d4a LT |
722 | *list = NULL; |
723 | ||
a84b794a | 724 | init_indegree_slab(&indegree); |
da24b104 | 725 | memset(&queue, '\0', sizeof(queue)); |
81c6b38b | 726 | |
da24b104 JH |
727 | switch (sort_order) { |
728 | default: /* REV_SORT_IN_GRAPH_ORDER */ | |
729 | queue.compare = NULL; | |
730 | break; | |
731 | case REV_SORT_BY_COMMIT_DATE: | |
732 | queue.compare = compare_commits_by_commit_date; | |
733 | break; | |
81c6b38b JH |
734 | case REV_SORT_BY_AUTHOR_DATE: |
735 | init_author_date_slab(&author_date); | |
736 | queue.compare = compare_commits_by_author_date; | |
737 | queue.cb_data = &author_date; | |
738 | break; | |
da24b104 | 739 | } |
96c4f4a3 | 740 | |
23c17d4a LT |
741 | /* Mark them and clear the indegree */ |
742 | for (next = orig; next; next = next->next) { | |
743 | struct commit *commit = next->item; | |
a84b794a | 744 | *(indegree_slab_at(&indegree, commit)) = 1; |
81c6b38b JH |
745 | /* also record the author dates, if needed */ |
746 | if (sort_order == REV_SORT_BY_AUTHOR_DATE) | |
747 | record_author_date(&author_date, commit); | |
ab580ace | 748 | } |
23c17d4a | 749 | |
ab580ace | 750 | /* update the indegree */ |
23c17d4a | 751 | for (next = orig; next; next = next->next) { |
da24b104 | 752 | struct commit_list *parents = next->item->parents; |
ab580ace | 753 | while (parents) { |
23c17d4a | 754 | struct commit *parent = parents->item; |
a84b794a | 755 | int *pi = indegree_slab_at(&indegree, parent); |
6b6dcfc2 | 756 | |
96c4f4a3 JK |
757 | if (*pi) |
758 | (*pi)++; | |
23c17d4a | 759 | parents = parents->next; |
ab580ace | 760 | } |
ab580ace | 761 | } |
23c17d4a | 762 | |
a6080a0a | 763 | /* |
674d1727 PH |
764 | * find the tips |
765 | * | |
766 | * tips are nodes not reachable from any other node in the list | |
767 | * | |
768 | * the tips serve as a starting set for the work queue. | |
769 | */ | |
23c17d4a LT |
770 | for (next = orig; next; next = next->next) { |
771 | struct commit *commit = next->item; | |
ab580ace | 772 | |
a84b794a | 773 | if (*(indegree_slab_at(&indegree, commit)) == 1) |
da24b104 | 774 | prio_queue_put(&queue, commit); |
ab580ace | 775 | } |
4c8725f1 | 776 | |
da24b104 JH |
777 | /* |
778 | * This is unfortunate; the initial tips need to be shown | |
779 | * in the order given from the revision traversal machinery. | |
780 | */ | |
781 | if (sort_order == REV_SORT_IN_GRAPH_ORDER) | |
782 | prio_queue_reverse(&queue); | |
783 | ||
784 | /* We no longer need the commit list */ | |
785 | free_commit_list(orig); | |
23c17d4a LT |
786 | |
787 | pptr = list; | |
788 | *list = NULL; | |
da24b104 JH |
789 | while ((commit = prio_queue_get(&queue)) != NULL) { |
790 | struct commit_list *parents; | |
23c17d4a | 791 | |
23c17d4a | 792 | for (parents = commit->parents; parents ; parents = parents->next) { |
cd2b8ae9 | 793 | struct commit *parent = parents->item; |
a84b794a | 794 | int *pi = indegree_slab_at(&indegree, parent); |
23c17d4a | 795 | |
96c4f4a3 | 796 | if (!*pi) |
23c17d4a LT |
797 | continue; |
798 | ||
799 | /* | |
800 | * parents are only enqueued for emission | |
801 | * when all their children have been emitted thereby | |
802 | * guaranteeing topological order. | |
803 | */ | |
da24b104 JH |
804 | if (--(*pi) == 1) |
805 | prio_queue_put(&queue, parent); | |
ab580ace JS |
806 | } |
807 | /* | |
da24b104 JH |
808 | * all children of commit have already been |
809 | * emitted. we can emit it now. | |
674d1727 | 810 | */ |
a84b794a | 811 | *(indegree_slab_at(&indegree, commit)) = 0; |
da24b104 JH |
812 | |
813 | pptr = &commit_list_insert(commit, pptr)->next; | |
ab580ace | 814 | } |
96c4f4a3 | 815 | |
a84b794a | 816 | clear_indegree_slab(&indegree); |
da24b104 | 817 | clear_prio_queue(&queue); |
81c6b38b JH |
818 | if (sort_order == REV_SORT_BY_AUTHOR_DATE) |
819 | clear_author_date_slab(&author_date); | |
ab580ace | 820 | } |
7c6f8aaf | 821 | |
1295228d | 822 | /* merge-base stuff */ |
7c6f8aaf | 823 | |
208acbfb | 824 | /* Remember to update object flag allocation in object.h */ |
577ed5c2 JH |
825 | #define PARENT1 (1u<<16) |
826 | #define PARENT2 (1u<<17) | |
827 | #define STALE (1u<<18) | |
828 | #define RESULT (1u<<19) | |
7c6f8aaf | 829 | |
1295228d JH |
830 | static const unsigned all_flags = (PARENT1 | PARENT2 | STALE | RESULT); |
831 | ||
73f43f22 | 832 | static int queue_has_nonstale(struct prio_queue *queue) |
7c6f8aaf | 833 | { |
73f43f22 JK |
834 | int i; |
835 | for (i = 0; i < queue->nr; i++) { | |
836 | struct commit *commit = queue->array[i].data; | |
837 | if (!(commit->object.flags & STALE)) | |
838 | return 1; | |
7c6f8aaf | 839 | } |
73f43f22 | 840 | return 0; |
7c6f8aaf JS |
841 | } |
842 | ||
d866924a | 843 | /* all input commits in one and twos[] must have been parsed! */ |
d7c1ec3e DS |
844 | static struct commit_list *paint_down_to_common(struct commit *one, int n, |
845 | struct commit **twos, | |
846 | int min_generation) | |
7c6f8aaf | 847 | { |
3afc679b | 848 | struct prio_queue queue = { compare_commits_by_gen_then_commit_date }; |
7c6f8aaf | 849 | struct commit_list *result = NULL; |
6a938648 | 850 | int i; |
d7c1ec3e | 851 | uint32_t last_gen = GENERATION_NUMBER_INFINITY; |
7c6f8aaf | 852 | |
f3249438 | 853 | one->object.flags |= PARENT1; |
73f43f22 JK |
854 | if (!n) { |
855 | commit_list_append(one, &result); | |
856 | return result; | |
857 | } | |
858 | prio_queue_put(&queue, one); | |
859 | ||
6a938648 JH |
860 | for (i = 0; i < n; i++) { |
861 | twos[i]->object.flags |= PARENT2; | |
73f43f22 | 862 | prio_queue_put(&queue, twos[i]); |
6a938648 | 863 | } |
7c6f8aaf | 864 | |
73f43f22 JK |
865 | while (queue_has_nonstale(&queue)) { |
866 | struct commit *commit = prio_queue_get(&queue); | |
7c6f8aaf | 867 | struct commit_list *parents; |
f3249438 | 868 | int flags; |
7c6f8aaf | 869 | |
d7c1ec3e DS |
870 | if (commit->generation > last_gen) |
871 | BUG("bad generation skip %8x > %8x at %s", | |
872 | commit->generation, last_gen, | |
873 | oid_to_hex(&commit->object.oid)); | |
874 | last_gen = commit->generation; | |
875 | ||
876 | if (commit->generation < min_generation) | |
877 | break; | |
878 | ||
f3249438 JH |
879 | flags = commit->object.flags & (PARENT1 | PARENT2 | STALE); |
880 | if (flags == (PARENT1 | PARENT2)) { | |
881 | if (!(commit->object.flags & RESULT)) { | |
882 | commit->object.flags |= RESULT; | |
47e44ed1 | 883 | commit_list_insert_by_date(commit, &result); |
f3249438 | 884 | } |
542ccefe JH |
885 | /* Mark parents of a found merge stale */ |
886 | flags |= STALE; | |
7c6f8aaf JS |
887 | } |
888 | parents = commit->parents; | |
889 | while (parents) { | |
890 | struct commit *p = parents->item; | |
891 | parents = parents->next; | |
892 | if ((p->object.flags & flags) == flags) | |
893 | continue; | |
172947e6 MK |
894 | if (parse_commit(p)) |
895 | return NULL; | |
7c6f8aaf | 896 | p->object.flags |= flags; |
73f43f22 | 897 | prio_queue_put(&queue, p); |
7c6f8aaf JS |
898 | } |
899 | } | |
900 | ||
73f43f22 | 901 | clear_prio_queue(&queue); |
da1f5156 JH |
902 | return result; |
903 | } | |
904 | ||
905 | static struct commit_list *merge_bases_many(struct commit *one, int n, struct commit **twos) | |
906 | { | |
907 | struct commit_list *list = NULL; | |
908 | struct commit_list *result = NULL; | |
909 | int i; | |
910 | ||
911 | for (i = 0; i < n; i++) { | |
912 | if (one == twos[i]) | |
913 | /* | |
914 | * We do not mark this even with RESULT so we do not | |
915 | * have to clean it up. | |
916 | */ | |
917 | return commit_list_insert(one, &result); | |
918 | } | |
919 | ||
920 | if (parse_commit(one)) | |
921 | return NULL; | |
922 | for (i = 0; i < n; i++) { | |
923 | if (parse_commit(twos[i])) | |
924 | return NULL; | |
925 | } | |
926 | ||
d7c1ec3e | 927 | list = paint_down_to_common(one, n, twos, 0); |
da1f5156 | 928 | |
f3249438 | 929 | while (list) { |
e510ab89 RS |
930 | struct commit *commit = pop_commit(&list); |
931 | if (!(commit->object.flags & STALE)) | |
932 | commit_list_insert_by_date(commit, &result); | |
f3249438 JH |
933 | } |
934 | return result; | |
935 | } | |
7c6f8aaf | 936 | |
5240c9d7 MV |
937 | struct commit_list *get_octopus_merge_bases(struct commit_list *in) |
938 | { | |
939 | struct commit_list *i, *j, *k, *ret = NULL; | |
5240c9d7 | 940 | |
6bc76725 VM |
941 | if (!in) |
942 | return ret; | |
943 | ||
944 | commit_list_insert(in->item, &ret); | |
945 | ||
946 | for (i = in->next; i; i = i->next) { | |
258c03eb | 947 | struct commit_list *new_commits = NULL, *end = NULL; |
6bc76725 VM |
948 | |
949 | for (j = ret; j; j = j->next) { | |
950 | struct commit_list *bases; | |
2ce406cc | 951 | bases = get_merge_bases(i->item, j->item); |
258c03eb BW |
952 | if (!new_commits) |
953 | new_commits = bases; | |
6bc76725 VM |
954 | else |
955 | end->next = bases; | |
956 | for (k = bases; k; k = k->next) | |
957 | end = k; | |
5240c9d7 | 958 | } |
258c03eb | 959 | ret = new_commits; |
5240c9d7 MV |
960 | } |
961 | return ret; | |
962 | } | |
963 | ||
94f0ced0 JH |
964 | static int remove_redundant(struct commit **array, int cnt) |
965 | { | |
966 | /* | |
967 | * Some commit in the array may be an ancestor of | |
968 | * another commit. Move such commit to the end of | |
969 | * the array, and return the number of commits that | |
970 | * are independent from each other. | |
971 | */ | |
972 | struct commit **work; | |
973 | unsigned char *redundant; | |
974 | int *filled_index; | |
975 | int i, j, filled; | |
976 | ||
977 | work = xcalloc(cnt, sizeof(*work)); | |
978 | redundant = xcalloc(cnt, 1); | |
b32fa95f | 979 | ALLOC_ARRAY(filled_index, cnt - 1); |
94f0ced0 | 980 | |
d866924a JH |
981 | for (i = 0; i < cnt; i++) |
982 | parse_commit(array[i]); | |
94f0ced0 JH |
983 | for (i = 0; i < cnt; i++) { |
984 | struct commit_list *common; | |
04bc8d1e | 985 | uint32_t min_generation = array[i]->generation; |
94f0ced0 JH |
986 | |
987 | if (redundant[i]) | |
988 | continue; | |
989 | for (j = filled = 0; j < cnt; j++) { | |
990 | if (i == j || redundant[j]) | |
991 | continue; | |
992 | filled_index[filled] = j; | |
993 | work[filled++] = array[j]; | |
04bc8d1e DS |
994 | |
995 | if (array[j]->generation < min_generation) | |
996 | min_generation = array[j]->generation; | |
94f0ced0 | 997 | } |
04bc8d1e DS |
998 | common = paint_down_to_common(array[i], filled, work, |
999 | min_generation); | |
94f0ced0 JH |
1000 | if (array[i]->object.flags & PARENT2) |
1001 | redundant[i] = 1; | |
1002 | for (j = 0; j < filled; j++) | |
1003 | if (work[j]->object.flags & PARENT1) | |
1004 | redundant[filled_index[j]] = 1; | |
1005 | clear_commit_marks(array[i], all_flags); | |
abc03512 | 1006 | clear_commit_marks_many(filled, work, all_flags); |
94f0ced0 JH |
1007 | free_commit_list(common); |
1008 | } | |
1009 | ||
1010 | /* Now collect the result */ | |
45ccef87 | 1011 | COPY_ARRAY(work, array, cnt); |
94f0ced0 JH |
1012 | for (i = filled = 0; i < cnt; i++) |
1013 | if (!redundant[i]) | |
1014 | array[filled++] = work[i]; | |
1015 | for (j = filled, i = 0; i < cnt; i++) | |
1016 | if (redundant[i]) | |
1017 | array[j++] = work[i]; | |
1018 | free(work); | |
1019 | free(redundant); | |
1020 | free(filled_index); | |
1021 | return filled; | |
1022 | } | |
1023 | ||
2ce406cc JH |
1024 | static struct commit_list *get_merge_bases_many_0(struct commit *one, |
1025 | int n, | |
1026 | struct commit **twos, | |
1027 | int cleanup) | |
f3249438 | 1028 | { |
f3249438 JH |
1029 | struct commit_list *list; |
1030 | struct commit **rslt; | |
1031 | struct commit_list *result; | |
94f0ced0 | 1032 | int cnt, i; |
f3249438 | 1033 | |
6a938648 JH |
1034 | result = merge_bases_many(one, n, twos); |
1035 | for (i = 0; i < n; i++) { | |
1036 | if (one == twos[i]) | |
1037 | return result; | |
1038 | } | |
f3249438 JH |
1039 | if (!result || !result->next) { |
1040 | if (cleanup) { | |
1041 | clear_commit_marks(one, all_flags); | |
e895cb51 | 1042 | clear_commit_marks_many(n, twos, all_flags); |
7c6f8aaf | 1043 | } |
f3249438 | 1044 | return result; |
7c6f8aaf JS |
1045 | } |
1046 | ||
f3249438 | 1047 | /* There are more than one */ |
4bbaa1eb | 1048 | cnt = commit_list_count(result); |
f3249438 JH |
1049 | rslt = xcalloc(cnt, sizeof(*rslt)); |
1050 | for (list = result, i = 0; list; list = list->next) | |
1051 | rslt[i++] = list->item; | |
1052 | free_commit_list(result); | |
1053 | ||
1054 | clear_commit_marks(one, all_flags); | |
e895cb51 | 1055 | clear_commit_marks_many(n, twos, all_flags); |
7c6f8aaf | 1056 | |
94f0ced0 | 1057 | cnt = remove_redundant(rslt, cnt); |
f3249438 | 1058 | result = NULL; |
94f0ced0 JH |
1059 | for (i = 0; i < cnt; i++) |
1060 | commit_list_insert_by_date(rslt[i], &result); | |
f3249438 | 1061 | free(rslt); |
7c6f8aaf JS |
1062 | return result; |
1063 | } | |
2ecd2bbc | 1064 | |
2ce406cc JH |
1065 | struct commit_list *get_merge_bases_many(struct commit *one, |
1066 | int n, | |
1067 | struct commit **twos) | |
1068 | { | |
1069 | return get_merge_bases_many_0(one, n, twos, 1); | |
1070 | } | |
1071 | ||
1072 | struct commit_list *get_merge_bases_many_dirty(struct commit *one, | |
1073 | int n, | |
1074 | struct commit **twos) | |
1075 | { | |
1076 | return get_merge_bases_many_0(one, n, twos, 0); | |
1077 | } | |
1078 | ||
1079 | struct commit_list *get_merge_bases(struct commit *one, struct commit *two) | |
6a938648 | 1080 | { |
2ce406cc | 1081 | return get_merge_bases_many_0(one, 1, &two, 1); |
6a938648 JH |
1082 | } |
1083 | ||
a20efee9 | 1084 | /* |
41ccfdd9 | 1085 | * Is "commit" a descendant of one of the elements on the "with_commit" list? |
a20efee9 | 1086 | */ |
7fcdb36e JG |
1087 | int is_descendant_of(struct commit *commit, struct commit_list *with_commit) |
1088 | { | |
1089 | if (!with_commit) | |
1090 | return 1; | |
1091 | while (with_commit) { | |
1092 | struct commit *other; | |
1093 | ||
1094 | other = with_commit->item; | |
1095 | with_commit = with_commit->next; | |
a20efee9 | 1096 | if (in_merge_bases(other, commit)) |
7fcdb36e JG |
1097 | return 1; |
1098 | } | |
1099 | return 0; | |
1100 | } | |
1101 | ||
a20efee9 | 1102 | /* |
4c4b27e8 | 1103 | * Is "commit" an ancestor of one of the "references"? |
a20efee9 | 1104 | */ |
4c4b27e8 | 1105 | int in_merge_bases_many(struct commit *commit, int nr_reference, struct commit **reference) |
2ecd2bbc | 1106 | { |
6440fdba | 1107 | struct commit_list *bases; |
4c4b27e8 | 1108 | int ret = 0, i; |
f9b8908b | 1109 | uint32_t min_generation = GENERATION_NUMBER_INFINITY; |
2ecd2bbc | 1110 | |
4c4b27e8 | 1111 | if (parse_commit(commit)) |
6440fdba | 1112 | return ret; |
f9b8908b | 1113 | for (i = 0; i < nr_reference; i++) { |
4c4b27e8 JH |
1114 | if (parse_commit(reference[i])) |
1115 | return ret; | |
f9b8908b DS |
1116 | if (reference[i]->generation < min_generation) |
1117 | min_generation = reference[i]->generation; | |
1118 | } | |
1119 | ||
1120 | if (commit->generation > min_generation) | |
1121 | return ret; | |
2ecd2bbc | 1122 | |
d7c1ec3e | 1123 | bases = paint_down_to_common(commit, nr_reference, reference, commit->generation); |
6440fdba JH |
1124 | if (commit->object.flags & PARENT2) |
1125 | ret = 1; | |
b0f9e9ee | 1126 | clear_commit_marks(commit, all_flags); |
557899ff | 1127 | clear_commit_marks_many(nr_reference, reference, all_flags); |
2ecd2bbc JH |
1128 | free_commit_list(bases); |
1129 | return ret; | |
1130 | } | |
98cf9c3b | 1131 | |
4c4b27e8 JH |
1132 | /* |
1133 | * Is "commit" an ancestor of (i.e. reachable from) the "reference"? | |
1134 | */ | |
1135 | int in_merge_bases(struct commit *commit, struct commit *reference) | |
1136 | { | |
1137 | return in_merge_bases_many(commit, 1, &reference); | |
1138 | } | |
1139 | ||
98cf9c3b JH |
1140 | struct commit_list *reduce_heads(struct commit_list *heads) |
1141 | { | |
1142 | struct commit_list *p; | |
1143 | struct commit_list *result = NULL, **tail = &result; | |
f37d3c75 JH |
1144 | struct commit **array; |
1145 | int num_head, i; | |
98cf9c3b JH |
1146 | |
1147 | if (!heads) | |
1148 | return NULL; | |
1149 | ||
f37d3c75 JH |
1150 | /* Uniquify */ |
1151 | for (p = heads; p; p = p->next) | |
1152 | p->item->object.flags &= ~STALE; | |
1153 | for (p = heads, num_head = 0; p; p = p->next) { | |
1154 | if (p->item->object.flags & STALE) | |
711f6b29 | 1155 | continue; |
f37d3c75 JH |
1156 | p->item->object.flags |= STALE; |
1157 | num_head++; | |
1158 | } | |
c4a7b009 | 1159 | array = xcalloc(num_head, sizeof(*array)); |
f37d3c75 JH |
1160 | for (p = heads, i = 0; p; p = p->next) { |
1161 | if (p->item->object.flags & STALE) { | |
1162 | array[i++] = p->item; | |
1163 | p->item->object.flags &= ~STALE; | |
98cf9c3b | 1164 | } |
98cf9c3b | 1165 | } |
f37d3c75 JH |
1166 | num_head = remove_redundant(array, num_head); |
1167 | for (i = 0; i < num_head; i++) | |
1168 | tail = &commit_list_insert(array[i], tail)->next; | |
cb7b29eb | 1169 | free(array); |
98cf9c3b JH |
1170 | return result; |
1171 | } | |
40d52ff7 | 1172 | |
4da72644 MÅ |
1173 | void reduce_heads_replace(struct commit_list **heads) |
1174 | { | |
1175 | struct commit_list *result = reduce_heads(*heads); | |
1176 | free_commit_list(*heads); | |
1177 | *heads = result; | |
1178 | } | |
1179 | ||
ba3c69a9 JH |
1180 | static const char gpg_sig_header[] = "gpgsig"; |
1181 | static const int gpg_sig_header_len = sizeof(gpg_sig_header) - 1; | |
1182 | ||
1183 | static int do_sign_commit(struct strbuf *buf, const char *keyid) | |
1184 | { | |
1185 | struct strbuf sig = STRBUF_INIT; | |
1186 | int inspos, copypos; | |
3324dd8f | 1187 | const char *eoh; |
ba3c69a9 JH |
1188 | |
1189 | /* find the end of the header */ | |
3324dd8f JS |
1190 | eoh = strstr(buf->buf, "\n\n"); |
1191 | if (!eoh) | |
1192 | inspos = buf->len; | |
1193 | else | |
1194 | inspos = eoh - buf->buf + 1; | |
ba3c69a9 JH |
1195 | |
1196 | if (!keyid || !*keyid) | |
1197 | keyid = get_signing_key(); | |
1198 | if (sign_buffer(buf, &sig, keyid)) { | |
1199 | strbuf_release(&sig); | |
1200 | return -1; | |
1201 | } | |
1202 | ||
1203 | for (copypos = 0; sig.buf[copypos]; ) { | |
1204 | const char *bol = sig.buf + copypos; | |
1205 | const char *eol = strchrnul(bol, '\n'); | |
1206 | int len = (eol - bol) + !!*eol; | |
1207 | ||
1208 | if (!copypos) { | |
1209 | strbuf_insert(buf, inspos, gpg_sig_header, gpg_sig_header_len); | |
1210 | inspos += gpg_sig_header_len; | |
1211 | } | |
1212 | strbuf_insert(buf, inspos++, " ", 1); | |
1213 | strbuf_insert(buf, inspos, bol, len); | |
1214 | inspos += len; | |
1215 | copypos += len; | |
1216 | } | |
1217 | strbuf_release(&sig); | |
1218 | return 0; | |
1219 | } | |
1220 | ||
218aa3a6 | 1221 | int parse_signed_commit(const struct commit *commit, |
0c37f1fc JH |
1222 | struct strbuf *payload, struct strbuf *signature) |
1223 | { | |
218aa3a6 | 1224 | |
0c37f1fc | 1225 | unsigned long size; |
218aa3a6 | 1226 | const char *buffer = get_commit_buffer(commit, &size); |
0c37f1fc | 1227 | int in_signature, saw_signature = -1; |
218aa3a6 | 1228 | const char *line, *tail; |
0c37f1fc JH |
1229 | |
1230 | line = buffer; | |
1231 | tail = buffer + size; | |
1232 | in_signature = 0; | |
1233 | saw_signature = 0; | |
1234 | while (line < tail) { | |
1235 | const char *sig = NULL; | |
218aa3a6 | 1236 | const char *next = memchr(line, '\n', tail - line); |
0c37f1fc JH |
1237 | |
1238 | next = next ? next + 1 : tail; | |
1239 | if (in_signature && line[0] == ' ') | |
1240 | sig = line + 1; | |
59556548 | 1241 | else if (starts_with(line, gpg_sig_header) && |
0c37f1fc JH |
1242 | line[gpg_sig_header_len] == ' ') |
1243 | sig = line + gpg_sig_header_len + 1; | |
1244 | if (sig) { | |
1245 | strbuf_add(signature, sig, next - sig); | |
1246 | saw_signature = 1; | |
1247 | in_signature = 1; | |
1248 | } else { | |
1249 | if (*line == '\n') | |
1250 | /* dump the whole remainder of the buffer */ | |
1251 | next = tail; | |
1252 | strbuf_add(payload, line, next - line); | |
1253 | in_signature = 0; | |
1254 | } | |
1255 | line = next; | |
1256 | } | |
218aa3a6 | 1257 | unuse_commit_buffer(commit, buffer); |
0c37f1fc JH |
1258 | return saw_signature; |
1259 | } | |
1260 | ||
0b05ab6f CC |
1261 | int remove_signature(struct strbuf *buf) |
1262 | { | |
1263 | const char *line = buf->buf; | |
1264 | const char *tail = buf->buf + buf->len; | |
1265 | int in_signature = 0; | |
1266 | const char *sig_start = NULL; | |
1267 | const char *sig_end = NULL; | |
1268 | ||
1269 | while (line < tail) { | |
1270 | const char *next = memchr(line, '\n', tail - line); | |
1271 | next = next ? next + 1 : tail; | |
1272 | ||
1273 | if (in_signature && line[0] == ' ') | |
1274 | sig_end = next; | |
1275 | else if (starts_with(line, gpg_sig_header) && | |
1276 | line[gpg_sig_header_len] == ' ') { | |
1277 | sig_start = line; | |
1278 | sig_end = next; | |
1279 | in_signature = 1; | |
1280 | } else { | |
1281 | if (*line == '\n') | |
1282 | /* dump the whole remainder of the buffer */ | |
1283 | next = tail; | |
1284 | in_signature = 0; | |
1285 | } | |
1286 | line = next; | |
1287 | } | |
1288 | ||
1289 | if (sig_start) | |
1290 | strbuf_remove(buf, sig_start - buf->buf, sig_end - sig_start); | |
1291 | ||
1292 | return sig_start != NULL; | |
1293 | } | |
1294 | ||
5231c633 JH |
1295 | static void handle_signed_tag(struct commit *parent, struct commit_extra_header ***tail) |
1296 | { | |
1297 | struct merge_remote_desc *desc; | |
1298 | struct commit_extra_header *mergetag; | |
1299 | char *buf; | |
1300 | unsigned long size, len; | |
1301 | enum object_type type; | |
1302 | ||
1303 | desc = merge_remote_util(parent); | |
1304 | if (!desc || !desc->obj) | |
1305 | return; | |
b4f5aca4 | 1306 | buf = read_object_file(&desc->obj->oid, &type, &size); |
5231c633 JH |
1307 | if (!buf || type != OBJ_TAG) |
1308 | goto free_return; | |
1309 | len = parse_signature(buf, size); | |
1310 | if (size == len) | |
1311 | goto free_return; | |
1312 | /* | |
1313 | * We could verify this signature and either omit the tag when | |
1314 | * it does not validate, but the integrator may not have the | |
1315 | * public key of the signer of the tag he is merging, while a | |
1316 | * later auditor may have it while auditing, so let's not run | |
1317 | * verify-signed-buffer here for now... | |
1318 | * | |
1319 | * if (verify_signed_buffer(buf, len, buf + len, size - len, ...)) | |
1320 | * warn("warning: signed tag unverified."); | |
1321 | */ | |
1322 | mergetag = xcalloc(1, sizeof(*mergetag)); | |
1323 | mergetag->key = xstrdup("mergetag"); | |
1324 | mergetag->value = buf; | |
1325 | mergetag->len = size; | |
1326 | ||
1327 | **tail = mergetag; | |
1328 | *tail = &mergetag->next; | |
1329 | return; | |
1330 | ||
1331 | free_return: | |
1332 | free(buf); | |
1333 | } | |
1334 | ||
434060ec | 1335 | int check_commit_signature(const struct commit *commit, struct signature_check *sigc) |
ffb6d7d5 SG |
1336 | { |
1337 | struct strbuf payload = STRBUF_INIT; | |
1338 | struct strbuf signature = STRBUF_INIT; | |
434060ec | 1339 | int ret = 1; |
ffb6d7d5 SG |
1340 | |
1341 | sigc->result = 'N'; | |
1342 | ||
218aa3a6 | 1343 | if (parse_signed_commit(commit, &payload, &signature) <= 0) |
ffb6d7d5 | 1344 | goto out; |
434060ec | 1345 | ret = check_signature(payload.buf, payload.len, signature.buf, |
1346 | signature.len, sigc); | |
ffb6d7d5 SG |
1347 | |
1348 | out: | |
ffb6d7d5 SG |
1349 | strbuf_release(&payload); |
1350 | strbuf_release(&signature); | |
434060ec | 1351 | |
1352 | return ret; | |
ffb6d7d5 SG |
1353 | } |
1354 | ||
1355 | ||
1356 | ||
5231c633 JH |
1357 | void append_merge_tag_headers(struct commit_list *parents, |
1358 | struct commit_extra_header ***tail) | |
1359 | { | |
1360 | while (parents) { | |
1361 | struct commit *parent = parents->item; | |
1362 | handle_signed_tag(parent, tail); | |
1363 | parents = parents->next; | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | static void add_extra_header(struct strbuf *buffer, | |
1368 | struct commit_extra_header *extra) | |
1369 | { | |
1370 | strbuf_addstr(buffer, extra->key); | |
ed7a42a0 JH |
1371 | if (extra->len) |
1372 | strbuf_add_lines(buffer, " ", extra->value, extra->len); | |
1373 | else | |
1374 | strbuf_addch(buffer, '\n'); | |
1375 | } | |
1376 | ||
c871a1d1 JH |
1377 | struct commit_extra_header *read_commit_extra_headers(struct commit *commit, |
1378 | const char **exclude) | |
ed7a42a0 JH |
1379 | { |
1380 | struct commit_extra_header *extra = NULL; | |
1381 | unsigned long size; | |
218aa3a6 JK |
1382 | const char *buffer = get_commit_buffer(commit, &size); |
1383 | extra = read_commit_extra_header_lines(buffer, size, exclude); | |
1384 | unuse_commit_buffer(commit, buffer); | |
ed7a42a0 JH |
1385 | return extra; |
1386 | } | |
1387 | ||
fef461ea | 1388 | int for_each_mergetag(each_mergetag_fn fn, struct commit *commit, void *data) |
063da62b CC |
1389 | { |
1390 | struct commit_extra_header *extra, *to_free; | |
fef461ea | 1391 | int res = 0; |
063da62b CC |
1392 | |
1393 | to_free = read_commit_extra_headers(commit, NULL); | |
fef461ea | 1394 | for (extra = to_free; !res && extra; extra = extra->next) { |
063da62b CC |
1395 | if (strcmp(extra->key, "mergetag")) |
1396 | continue; /* not a merge tag */ | |
fef461ea | 1397 | res = fn(commit, extra, data); |
063da62b CC |
1398 | } |
1399 | free_commit_extra_headers(to_free); | |
fef461ea | 1400 | return res; |
063da62b CC |
1401 | } |
1402 | ||
ed7a42a0 JH |
1403 | static inline int standard_header_field(const char *field, size_t len) |
1404 | { | |
b072504c RS |
1405 | return ((len == 4 && !memcmp(field, "tree", 4)) || |
1406 | (len == 6 && !memcmp(field, "parent", 6)) || | |
1407 | (len == 6 && !memcmp(field, "author", 6)) || | |
1408 | (len == 9 && !memcmp(field, "committer", 9)) || | |
1409 | (len == 8 && !memcmp(field, "encoding", 8))); | |
ed7a42a0 JH |
1410 | } |
1411 | ||
c871a1d1 JH |
1412 | static int excluded_header_field(const char *field, size_t len, const char **exclude) |
1413 | { | |
1414 | if (!exclude) | |
1415 | return 0; | |
1416 | ||
1417 | while (*exclude) { | |
1418 | size_t xlen = strlen(*exclude); | |
b072504c | 1419 | if (len == xlen && !memcmp(field, *exclude, xlen)) |
c871a1d1 JH |
1420 | return 1; |
1421 | exclude++; | |
1422 | } | |
1423 | return 0; | |
1424 | } | |
1425 | ||
82a75299 JH |
1426 | static struct commit_extra_header *read_commit_extra_header_lines( |
1427 | const char *buffer, size_t size, | |
1428 | const char **exclude) | |
ed7a42a0 JH |
1429 | { |
1430 | struct commit_extra_header *extra = NULL, **tail = &extra, *it = NULL; | |
1431 | const char *line, *next, *eof, *eob; | |
1432 | struct strbuf buf = STRBUF_INIT; | |
1433 | ||
1434 | for (line = buffer, eob = line + size; | |
1435 | line < eob && *line != '\n'; | |
1436 | line = next) { | |
1437 | next = memchr(line, '\n', eob - line); | |
1438 | next = next ? next + 1 : eob; | |
1439 | if (*line == ' ') { | |
1440 | /* continuation */ | |
1441 | if (it) | |
1442 | strbuf_add(&buf, line + 1, next - (line + 1)); | |
1443 | continue; | |
1444 | } | |
1445 | if (it) | |
1446 | it->value = strbuf_detach(&buf, &it->len); | |
1447 | strbuf_reset(&buf); | |
1448 | it = NULL; | |
1449 | ||
50a01cc4 RS |
1450 | eof = memchr(line, ' ', next - line); |
1451 | if (!eof) | |
ed7a42a0 | 1452 | eof = next; |
b072504c RS |
1453 | else if (standard_header_field(line, eof - line) || |
1454 | excluded_header_field(line, eof - line, exclude)) | |
ed7a42a0 JH |
1455 | continue; |
1456 | ||
1457 | it = xcalloc(1, sizeof(*it)); | |
1458 | it->key = xmemdupz(line, eof-line); | |
1459 | *tail = it; | |
1460 | tail = &it->next; | |
1461 | if (eof + 1 < next) | |
1462 | strbuf_add(&buf, eof + 1, next - (eof + 1)); | |
1463 | } | |
1464 | if (it) | |
1465 | it->value = strbuf_detach(&buf, &it->len); | |
1466 | return extra; | |
5231c633 JH |
1467 | } |
1468 | ||
1469 | void free_commit_extra_headers(struct commit_extra_header *extra) | |
1470 | { | |
1471 | while (extra) { | |
1472 | struct commit_extra_header *next = extra->next; | |
1473 | free(extra->key); | |
1474 | free(extra->value); | |
1475 | free(extra); | |
1476 | extra = next; | |
1477 | } | |
1478 | } | |
1479 | ||
5078f344 PO |
1480 | int commit_tree(const char *msg, size_t msg_len, const struct object_id *tree, |
1481 | struct commit_list *parents, struct object_id *ret, | |
ba3c69a9 | 1482 | const char *author, const char *sign_commit) |
5231c633 JH |
1483 | { |
1484 | struct commit_extra_header *extra = NULL, **tail = &extra; | |
1485 | int result; | |
1486 | ||
1487 | append_merge_tag_headers(parents, &tail); | |
3ffefb54 | 1488 | result = commit_tree_extended(msg, msg_len, tree, parents, ret, |
ba3c69a9 | 1489 | author, sign_commit, extra); |
5231c633 JH |
1490 | free_commit_extra_headers(extra); |
1491 | return result; | |
1492 | } | |
1493 | ||
08a94a14 LT |
1494 | static int find_invalid_utf8(const char *buf, int len) |
1495 | { | |
1496 | int offset = 0; | |
e82bd6cc | 1497 | static const unsigned int max_codepoint[] = { |
1498 | 0x7f, 0x7ff, 0xffff, 0x10ffff | |
1499 | }; | |
08a94a14 LT |
1500 | |
1501 | while (len) { | |
1502 | unsigned char c = *buf++; | |
1503 | int bytes, bad_offset; | |
28110d4b | 1504 | unsigned int codepoint; |
e82bd6cc | 1505 | unsigned int min_val, max_val; |
08a94a14 LT |
1506 | |
1507 | len--; | |
1508 | offset++; | |
1509 | ||
1510 | /* Simple US-ASCII? No worries. */ | |
1511 | if (c < 0x80) | |
1512 | continue; | |
1513 | ||
1514 | bad_offset = offset-1; | |
1515 | ||
1516 | /* | |
1517 | * Count how many more high bits set: that's how | |
1518 | * many more bytes this sequence should have. | |
1519 | */ | |
1520 | bytes = 0; | |
1521 | while (c & 0x40) { | |
1522 | c <<= 1; | |
1523 | bytes++; | |
1524 | } | |
1525 | ||
28110d4b | 1526 | /* |
1527 | * Must be between 1 and 3 more bytes. Longer sequences result in | |
1528 | * codepoints beyond U+10FFFF, which are guaranteed never to exist. | |
1529 | */ | |
1530 | if (bytes < 1 || 3 < bytes) | |
08a94a14 LT |
1531 | return bad_offset; |
1532 | ||
1533 | /* Do we *have* that many bytes? */ | |
1534 | if (len < bytes) | |
1535 | return bad_offset; | |
1536 | ||
e82bd6cc | 1537 | /* |
1538 | * Place the encoded bits at the bottom of the value and compute the | |
1539 | * valid range. | |
1540 | */ | |
28110d4b | 1541 | codepoint = (c & 0x7f) >> bytes; |
e82bd6cc | 1542 | min_val = max_codepoint[bytes-1] + 1; |
1543 | max_val = max_codepoint[bytes]; | |
28110d4b | 1544 | |
08a94a14 LT |
1545 | offset += bytes; |
1546 | len -= bytes; | |
1547 | ||
1548 | /* And verify that they are good continuation bytes */ | |
1549 | do { | |
28110d4b | 1550 | codepoint <<= 6; |
1551 | codepoint |= *buf & 0x3f; | |
08a94a14 LT |
1552 | if ((*buf++ & 0xc0) != 0x80) |
1553 | return bad_offset; | |
1554 | } while (--bytes); | |
1555 | ||
e82bd6cc | 1556 | /* Reject codepoints that are out of range for the sequence length. */ |
1557 | if (codepoint < min_val || codepoint > max_val) | |
28110d4b | 1558 | return bad_offset; |
1559 | /* Surrogates are only for UTF-16 and cannot be encoded in UTF-8. */ | |
1560 | if ((codepoint & 0x1ff800) == 0xd800) | |
1561 | return bad_offset; | |
81050ac6 | 1562 | /* U+xxFFFE and U+xxFFFF are guaranteed non-characters. */ |
dc773a67 | 1563 | if ((codepoint & 0xfffe) == 0xfffe) |
81050ac6 PK |
1564 | return bad_offset; |
1565 | /* So are anything in the range U+FDD0..U+FDEF. */ | |
1566 | if (codepoint >= 0xfdd0 && codepoint <= 0xfdef) | |
28110d4b | 1567 | return bad_offset; |
08a94a14 LT |
1568 | } |
1569 | return -1; | |
1570 | } | |
1571 | ||
1572 | /* | |
1573 | * This verifies that the buffer is in proper utf8 format. | |
1574 | * | |
1575 | * If it isn't, it assumes any non-utf8 characters are Latin1, | |
1576 | * and does the conversion. | |
08a94a14 LT |
1577 | */ |
1578 | static int verify_utf8(struct strbuf *buf) | |
1579 | { | |
1580 | int ok = 1; | |
1581 | long pos = 0; | |
1582 | ||
1583 | for (;;) { | |
1584 | int bad; | |
1585 | unsigned char c; | |
1586 | unsigned char replace[2]; | |
1587 | ||
1588 | bad = find_invalid_utf8(buf->buf + pos, buf->len - pos); | |
1589 | if (bad < 0) | |
1590 | return ok; | |
1591 | pos += bad; | |
1592 | ok = 0; | |
1593 | c = buf->buf[pos]; | |
1594 | strbuf_remove(buf, pos, 1); | |
1595 | ||
1596 | /* We know 'c' must be in the range 128-255 */ | |
1597 | replace[0] = 0xc0 + (c >> 6); | |
1598 | replace[1] = 0x80 + (c & 0x3f); | |
1599 | strbuf_insert(buf, pos, replace, 2); | |
1600 | pos += 2; | |
1601 | } | |
1602 | } | |
1603 | ||
40d52ff7 | 1604 | static const char commit_utf8_warn[] = |
4fa4b315 VA |
1605 | N_("Warning: commit message did not conform to UTF-8.\n" |
1606 | "You may want to amend it after fixing the message, or set the config\n" | |
1607 | "variable i18n.commitencoding to the encoding your project uses.\n"); | |
40d52ff7 | 1608 | |
3ffefb54 | 1609 | int commit_tree_extended(const char *msg, size_t msg_len, |
5078f344 PO |
1610 | const struct object_id *tree, |
1611 | struct commit_list *parents, struct object_id *ret, | |
ba3c69a9 JH |
1612 | const char *author, const char *sign_commit, |
1613 | struct commit_extra_header *extra) | |
40d52ff7 JK |
1614 | { |
1615 | int result; | |
1616 | int encoding_is_utf8; | |
1617 | struct strbuf buffer; | |
1618 | ||
e816caa0 | 1619 | assert_oid_type(tree, OBJ_TREE); |
40d52ff7 | 1620 | |
3ffefb54 | 1621 | if (memchr(msg, '\0', msg_len)) |
37576c14 NTND |
1622 | return error("a NUL byte in commit log message not allowed."); |
1623 | ||
40d52ff7 JK |
1624 | /* Not having i18n.commitencoding is the same as having utf-8 */ |
1625 | encoding_is_utf8 = is_encoding_utf8(git_commit_encoding); | |
1626 | ||
1627 | strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */ | |
5078f344 | 1628 | strbuf_addf(&buffer, "tree %s\n", oid_to_hex(tree)); |
40d52ff7 JK |
1629 | |
1630 | /* | |
1631 | * NOTE! This ordering means that the same exact tree merged with a | |
1632 | * different order of parents will be a _different_ changeset even | |
1633 | * if everything else stays the same. | |
1634 | */ | |
1635 | while (parents) { | |
e510ab89 | 1636 | struct commit *parent = pop_commit(&parents); |
40d52ff7 | 1637 | strbuf_addf(&buffer, "parent %s\n", |
f2fd0760 | 1638 | oid_to_hex(&parent->object.oid)); |
40d52ff7 JK |
1639 | } |
1640 | ||
1641 | /* Person/date information */ | |
1642 | if (!author) | |
f9bc573f | 1643 | author = git_author_info(IDENT_STRICT); |
40d52ff7 | 1644 | strbuf_addf(&buffer, "author %s\n", author); |
f9bc573f | 1645 | strbuf_addf(&buffer, "committer %s\n", git_committer_info(IDENT_STRICT)); |
40d52ff7 JK |
1646 | if (!encoding_is_utf8) |
1647 | strbuf_addf(&buffer, "encoding %s\n", git_commit_encoding); | |
5231c633 JH |
1648 | |
1649 | while (extra) { | |
1650 | add_extra_header(&buffer, extra); | |
1651 | extra = extra->next; | |
1652 | } | |
40d52ff7 JK |
1653 | strbuf_addch(&buffer, '\n'); |
1654 | ||
1655 | /* And add the comment */ | |
3ffefb54 | 1656 | strbuf_add(&buffer, msg, msg_len); |
40d52ff7 JK |
1657 | |
1658 | /* And check the encoding */ | |
08a94a14 | 1659 | if (encoding_is_utf8 && !verify_utf8(&buffer)) |
4fa4b315 | 1660 | fprintf(stderr, _(commit_utf8_warn)); |
40d52ff7 | 1661 | |
e505146d RS |
1662 | if (sign_commit && do_sign_commit(&buffer, sign_commit)) { |
1663 | result = -1; | |
1664 | goto out; | |
1665 | } | |
ba3c69a9 | 1666 | |
a09c985e | 1667 | result = write_object_file(buffer.buf, buffer.len, commit_type, ret); |
e505146d | 1668 | out: |
40d52ff7 JK |
1669 | strbuf_release(&buffer); |
1670 | return result; | |
1671 | } | |
ae8e4c9c | 1672 | |
e2e5ac23 NTND |
1673 | define_commit_slab(merge_desc_slab, struct merge_remote_desc *); |
1674 | static struct merge_desc_slab merge_desc_slab = COMMIT_SLAB_INIT(1, merge_desc_slab); | |
1675 | ||
1676 | struct merge_remote_desc *merge_remote_util(struct commit *commit) | |
1677 | { | |
1678 | return *merge_desc_slab_at(&merge_desc_slab, commit); | |
1679 | } | |
1680 | ||
beb518c9 RS |
1681 | void set_merge_remote_desc(struct commit *commit, |
1682 | const char *name, struct object *obj) | |
1683 | { | |
1684 | struct merge_remote_desc *desc; | |
5447a76a | 1685 | FLEX_ALLOC_STR(desc, name, name); |
beb518c9 | 1686 | desc->obj = obj; |
e2e5ac23 | 1687 | *merge_desc_slab_at(&merge_desc_slab, commit) = desc; |
beb518c9 RS |
1688 | } |
1689 | ||
ae8e4c9c JH |
1690 | struct commit *get_merge_parent(const char *name) |
1691 | { | |
1692 | struct object *obj; | |
1693 | struct commit *commit; | |
7683e2e6 | 1694 | struct object_id oid; |
e82caf38 | 1695 | if (get_oid(name, &oid)) |
ae8e4c9c | 1696 | return NULL; |
109cd76d | 1697 | obj = parse_object(the_repository, &oid); |
ae8e4c9c | 1698 | commit = (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT); |
e2e5ac23 | 1699 | if (commit && !merge_remote_util(commit)) |
beb518c9 | 1700 | set_merge_remote_desc(commit, name, obj); |
ae8e4c9c JH |
1701 | return commit; |
1702 | } | |
89b5f1d9 RS |
1703 | |
1704 | /* | |
1705 | * Append a commit to the end of the commit_list. | |
1706 | * | |
1707 | * next starts by pointing to the variable that holds the head of an | |
1708 | * empty commit_list, and is updated to point to the "next" field of | |
1709 | * the last item on the list as new commits are appended. | |
1710 | * | |
1711 | * Usage example: | |
1712 | * | |
1713 | * struct commit_list *list; | |
1714 | * struct commit_list **next = &list; | |
1715 | * | |
1716 | * next = commit_list_append(c1, next); | |
1717 | * next = commit_list_append(c2, next); | |
1718 | * assert(commit_list_count(list) == 2); | |
1719 | * return list; | |
1720 | */ | |
1721 | struct commit_list **commit_list_append(struct commit *commit, | |
1722 | struct commit_list **next) | |
1723 | { | |
258c03eb BW |
1724 | struct commit_list *new_commit = xmalloc(sizeof(struct commit_list)); |
1725 | new_commit->item = commit; | |
1726 | *next = new_commit; | |
1727 | new_commit->next = NULL; | |
1728 | return &new_commit->next; | |
89b5f1d9 | 1729 | } |
efc7df45 | 1730 | |
fe6eb7f2 JK |
1731 | const char *find_commit_header(const char *msg, const char *key, size_t *out_len) |
1732 | { | |
1733 | int key_len = strlen(key); | |
1734 | const char *line = msg; | |
1735 | ||
1736 | while (line) { | |
1737 | const char *eol = strchrnul(line, '\n'); | |
1738 | ||
1739 | if (line == eol) | |
1740 | return NULL; | |
1741 | ||
1742 | if (eol - line > key_len && | |
1743 | !strncmp(line, key, key_len) && | |
1744 | line[key_len] == ' ') { | |
1745 | *out_len = eol - line - key_len - 1; | |
1746 | return line + key_len + 1; | |
1747 | } | |
1748 | line = *eol ? eol + 1 : NULL; | |
1749 | } | |
1750 | return NULL; | |
1751 | } | |
0ed8a4e1 | 1752 | |
8c384589 | 1753 | /* |
710714aa | 1754 | * Inspect the given string and determine the true "end" of the log message, in |
8c384589 | 1755 | * order to find where to put a new Signed-off-by: line. Ignored are |
d76650b8 BM |
1756 | * trailing comment lines and blank lines. To support "git commit -s |
1757 | * --amend" on an existing commit, we also ignore "Conflicts:". To | |
1758 | * support "git commit -v", we truncate at cut lines. | |
8c384589 CC |
1759 | * |
1760 | * Returns the number of bytes from the tail to ignore, to be fed as | |
1761 | * the second parameter to append_signoff(). | |
1762 | */ | |
710714aa | 1763 | int ignore_non_trailer(const char *buf, size_t len) |
8c384589 CC |
1764 | { |
1765 | int boc = 0; | |
1766 | int bol = 0; | |
1767 | int in_old_conflicts_block = 0; | |
d76650b8 | 1768 | size_t cutoff = wt_status_locate_end(buf, len); |
8c384589 | 1769 | |
d76650b8 | 1770 | while (bol < cutoff) { |
710714aa | 1771 | const char *next_line = memchr(buf + bol, '\n', len - bol); |
8c384589 | 1772 | |
710714aa JT |
1773 | if (!next_line) |
1774 | next_line = buf + len; | |
8c384589 CC |
1775 | else |
1776 | next_line++; | |
1777 | ||
710714aa | 1778 | if (buf[bol] == comment_line_char || buf[bol] == '\n') { |
8c384589 CC |
1779 | /* is this the first of the run of comments? */ |
1780 | if (!boc) | |
1781 | boc = bol; | |
1782 | /* otherwise, it is just continuing */ | |
710714aa | 1783 | } else if (starts_with(buf + bol, "Conflicts:\n")) { |
8c384589 CC |
1784 | in_old_conflicts_block = 1; |
1785 | if (!boc) | |
1786 | boc = bol; | |
710714aa | 1787 | } else if (in_old_conflicts_block && buf[bol] == '\t') { |
8c384589 CC |
1788 | ; /* a pathname in the conflicts block */ |
1789 | } else if (boc) { | |
1790 | /* the previous was not trailing comment */ | |
1791 | boc = 0; | |
1792 | in_old_conflicts_block = 0; | |
1793 | } | |
710714aa | 1794 | bol = next_line - buf; |
8c384589 | 1795 | } |
d76650b8 | 1796 | return boc ? len - boc : len - cutoff; |
8c384589 | 1797 | } |