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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" |
103148aa | 20 | #include "refs.h" |
02931217 | 21 | #include "commit-reach.h" |
175785e5 | 22 | |
82a75299 JH |
23 | static struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **); |
24 | ||
60ab26de LT |
25 | int save_commit_buffer = 1; |
26 | ||
175785e5 DB |
27 | const char *commit_type = "commit"; |
28 | ||
d9a05e74 | 29 | struct commit *lookup_commit_reference_gently(struct repository *r, |
21e1ee8f | 30 | const struct object_id *oid, int quiet) |
961784ee | 31 | { |
d9a05e74 SB |
32 | struct object *obj = deref_tag(r, |
33 | parse_object(r, oid), | |
109cd76d | 34 | NULL, 0); |
961784ee LT |
35 | |
36 | if (!obj) | |
37 | return NULL; | |
d9a05e74 | 38 | return object_as_type(r, obj, OBJ_COMMIT, quiet); |
f76412ed JH |
39 | } |
40 | ||
1f6c72fe | 41 | struct commit *lookup_commit_reference(struct repository *r, const struct object_id *oid) |
f76412ed | 42 | { |
1f6c72fe | 43 | return lookup_commit_reference_gently(r, oid, 0); |
961784ee LT |
44 | } |
45 | ||
bc83266a | 46 | struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref_name) |
baf18fc2 | 47 | { |
2122f675 | 48 | struct commit *c = lookup_commit_reference(the_repository, oid); |
baf18fc2 NTND |
49 | if (!c) |
50 | die(_("could not parse %s"), ref_name); | |
9001dc2a | 51 | if (!oideq(oid, &c->object.oid)) { |
baf18fc2 | 52 | warning(_("%s %s is not a commit!"), |
bc83266a | 53 | ref_name, oid_to_hex(oid)); |
baf18fc2 NTND |
54 | } |
55 | return c; | |
56 | } | |
57 | ||
bacf1687 | 58 | struct commit *lookup_commit(struct repository *r, const struct object_id *oid) |
175785e5 | 59 | { |
bacf1687 | 60 | struct object *obj = lookup_object(r, oid->hash); |
d36f51c1 | 61 | if (!obj) |
bacf1687 SB |
62 | return create_object(r, oid->hash, |
63 | alloc_commit_node(r)); | |
64 | return object_as_type(r, obj, OBJ_COMMIT, 0); | |
175785e5 DB |
65 | } |
66 | ||
a6fa5992 PN |
67 | struct commit *lookup_commit_reference_by_name(const char *name) |
68 | { | |
7683e2e6 | 69 | struct object_id oid; |
a6fa5992 PN |
70 | struct commit *commit; |
71 | ||
e82caf38 | 72 | if (get_oid_committish(name, &oid)) |
a6fa5992 | 73 | return NULL; |
2122f675 | 74 | commit = lookup_commit_reference(the_repository, &oid); |
5e7d4d3e | 75 | if (parse_commit(commit)) |
a6fa5992 PN |
76 | return NULL; |
77 | return commit; | |
78 | } | |
79 | ||
dddbad72 | 80 | static timestamp_t parse_commit_date(const char *buf, const char *tail) |
175785e5 | 81 | { |
0a617799 | 82 | const char *dateptr; |
175785e5 | 83 | |
0a617799 MK |
84 | if (buf + 6 >= tail) |
85 | return 0; | |
175785e5 DB |
86 | if (memcmp(buf, "author", 6)) |
87 | return 0; | |
0a617799 | 88 | while (buf < tail && *buf++ != '\n') |
175785e5 | 89 | /* nada */; |
0a617799 MK |
90 | if (buf + 9 >= tail) |
91 | return 0; | |
175785e5 DB |
92 | if (memcmp(buf, "committer", 9)) |
93 | return 0; | |
0a617799 | 94 | while (buf < tail && *buf++ != '>') |
175785e5 | 95 | /* nada */; |
0a617799 MK |
96 | if (buf >= tail) |
97 | return 0; | |
98 | dateptr = buf; | |
99 | while (buf < tail && *buf++ != '\n') | |
100 | /* nada */; | |
101 | if (buf >= tail) | |
102 | return 0; | |
1aeb7e75 JS |
103 | /* dateptr < buf && buf[-1] == '\n', so parsing will stop at buf-1 */ |
104 | return parse_timestamp(dateptr, NULL, 10); | |
175785e5 DB |
105 | } |
106 | ||
0a9136f3 DD |
107 | static const unsigned char *commit_graft_sha1_access(size_t index, void *table) |
108 | { | |
109 | struct commit_graft **commit_graft_table = table; | |
7683e2e6 | 110 | return commit_graft_table[index]->oid.hash; |
0a9136f3 DD |
111 | } |
112 | ||
e808656c | 113 | static int commit_graft_pos(struct repository *r, const unsigned char *sha1) |
5da5c8f4 | 114 | { |
e808656c BW |
115 | return sha1_pos(sha1, r->parsed_objects->grafts, |
116 | r->parsed_objects->grafts_nr, | |
0a9136f3 | 117 | commit_graft_sha1_access); |
5da5c8f4 JH |
118 | } |
119 | ||
a3b78e83 BW |
120 | int register_commit_graft(struct repository *r, struct commit_graft *graft, |
121 | int ignore_dups) | |
5040f17e | 122 | { |
a3b78e83 | 123 | int pos = commit_graft_pos(r, graft->oid.hash); |
a6080a0a | 124 | |
5040f17e JH |
125 | if (0 <= pos) { |
126 | if (ignore_dups) | |
127 | free(graft); | |
128 | else { | |
a3b78e83 BW |
129 | free(r->parsed_objects->grafts[pos]); |
130 | r->parsed_objects->grafts[pos] = graft; | |
5040f17e JH |
131 | } |
132 | return 1; | |
133 | } | |
134 | pos = -pos - 1; | |
a3b78e83 BW |
135 | ALLOC_GROW(r->parsed_objects->grafts, |
136 | r->parsed_objects->grafts_nr + 1, | |
137 | r->parsed_objects->grafts_alloc); | |
138 | r->parsed_objects->grafts_nr++; | |
139 | if (pos < r->parsed_objects->grafts_nr) | |
140 | memmove(r->parsed_objects->grafts + pos + 1, | |
141 | r->parsed_objects->grafts + pos, | |
142 | (r->parsed_objects->grafts_nr - pos - 1) * | |
143 | sizeof(*r->parsed_objects->grafts)); | |
144 | r->parsed_objects->grafts[pos] = graft; | |
5040f17e JH |
145 | return 0; |
146 | } | |
147 | ||
9a934032 | 148 | struct commit_graft *read_graft_line(struct strbuf *line) |
5040f17e JH |
149 | { |
150 | /* The format is just "Commit Parent1 Parent2 ...\n" */ | |
cfa5bf16 PO |
151 | int i, phase; |
152 | const char *tail = NULL; | |
5040f17e | 153 | struct commit_graft *graft = NULL; |
cfa5bf16 | 154 | struct object_id dummy_oid, *oid; |
5040f17e | 155 | |
9a934032 PO |
156 | strbuf_rtrim(line); |
157 | if (!line->len || line->buf[0] == '#') | |
5bc4ce58 | 158 | return NULL; |
cfa5bf16 PO |
159 | /* |
160 | * phase 0 verifies line, counts hashes in line and allocates graft | |
161 | * phase 1 fills graft | |
162 | */ | |
163 | for (phase = 0; phase < 2; phase++) { | |
164 | oid = graft ? &graft->oid : &dummy_oid; | |
165 | if (parse_oid_hex(line->buf, oid, &tail)) | |
5040f17e | 166 | goto bad_graft_data; |
cfa5bf16 PO |
167 | for (i = 0; *tail != '\0'; i++) { |
168 | oid = graft ? &graft->parent[i] : &dummy_oid; | |
169 | if (!isspace(*tail++) || parse_oid_hex(tail, oid, &tail)) | |
170 | goto bad_graft_data; | |
171 | } | |
172 | if (!graft) { | |
173 | graft = xmalloc(st_add(sizeof(*graft), | |
174 | st_mult(sizeof(struct object_id), i))); | |
175 | graft->nr_parent = i; | |
176 | } | |
5040f17e JH |
177 | } |
178 | return graft; | |
df5d43be RT |
179 | |
180 | bad_graft_data: | |
9a934032 | 181 | error("bad graft data: %s", line->buf); |
cfa5bf16 | 182 | assert(!graft); |
df5d43be | 183 | return NULL; |
5040f17e JH |
184 | } |
185 | ||
d0e5dd0e | 186 | static int read_graft_file(struct repository *r, const char *graft_file) |
5da5c8f4 | 187 | { |
e9d983f1 | 188 | FILE *fp = fopen_or_warn(graft_file, "r"); |
e228c173 | 189 | struct strbuf buf = STRBUF_INIT; |
5040f17e JH |
190 | if (!fp) |
191 | return -1; | |
f9f99b3f JS |
192 | if (advice_graft_file_deprecated) |
193 | advise(_("Support for <GIT_DIR>/info/grafts is deprecated\n" | |
194 | "and will be removed in a future Git version.\n" | |
195 | "\n" | |
196 | "Please use \"git replace --convert-graft-file\"\n" | |
197 | "to convert the grafts into replace refs.\n" | |
198 | "\n" | |
199 | "Turn this message off by running\n" | |
200 | "\"git config advice.graftFileDeprecated false\"")); | |
e228c173 | 201 | while (!strbuf_getwholeline(&buf, fp, '\n')) { |
5da5c8f4 | 202 | /* The format is just "Commit Parent1 Parent2 ...\n" */ |
9a934032 | 203 | struct commit_graft *graft = read_graft_line(&buf); |
5bc4ce58 JH |
204 | if (!graft) |
205 | continue; | |
d0e5dd0e | 206 | if (register_commit_graft(r, graft, 1)) |
e228c173 | 207 | error("duplicate graft data: %s", buf.buf); |
5da5c8f4 JH |
208 | } |
209 | fclose(fp); | |
e228c173 | 210 | strbuf_release(&buf); |
5040f17e JH |
211 | return 0; |
212 | } | |
213 | ||
20fd6d57 | 214 | void prepare_commit_graft(struct repository *r) |
5040f17e | 215 | { |
5040f17e JH |
216 | char *graft_file; |
217 | ||
2f6c767f | 218 | if (r->parsed_objects->commit_graft_prepared) |
5040f17e | 219 | return; |
14a9bd28 JK |
220 | if (!startup_info->have_repository) |
221 | return; | |
222 | ||
2f6c767f SB |
223 | graft_file = get_graft_file(r); |
224 | read_graft_file(r, graft_file); | |
ed09aef0 | 225 | /* make sure shallows are read */ |
2f6c767f SB |
226 | is_repository_shallow(r); |
227 | r->parsed_objects->commit_graft_prepared = 1; | |
5da5c8f4 JH |
228 | } |
229 | ||
b9dbddf6 | 230 | struct commit_graft *lookup_commit_graft(struct repository *r, const struct object_id *oid) |
5da5c8f4 JH |
231 | { |
232 | int pos; | |
b9dbddf6 SB |
233 | prepare_commit_graft(r); |
234 | pos = commit_graft_pos(r, oid->hash); | |
5da5c8f4 JH |
235 | if (pos < 0) |
236 | return NULL; | |
b9dbddf6 | 237 | return r->parsed_objects->grafts[pos]; |
5da5c8f4 JH |
238 | } |
239 | ||
09d46644 | 240 | int for_each_commit_graft(each_commit_graft_fn fn, void *cb_data) |
ed09aef0 | 241 | { |
09d46644 | 242 | int i, ret; |
6a1a79fd JN |
243 | for (i = ret = 0; i < the_repository->parsed_objects->grafts_nr && !ret; i++) |
244 | ret = fn(the_repository->parsed_objects->grafts[i], cb_data); | |
09d46644 | 245 | return ret; |
ed09aef0 JS |
246 | } |
247 | ||
e92b848c | 248 | int unregister_shallow(const struct object_id *oid) |
f53514bc | 249 | { |
be479e80 | 250 | int pos = commit_graft_pos(the_repository, oid->hash); |
f53514bc JS |
251 | if (pos < 0) |
252 | return -1; | |
6a1a79fd JN |
253 | if (pos + 1 < the_repository->parsed_objects->grafts_nr) |
254 | MOVE_ARRAY(the_repository->parsed_objects->grafts + pos, | |
255 | the_repository->parsed_objects->grafts + pos + 1, | |
256 | the_repository->parsed_objects->grafts_nr - pos - 1); | |
257 | the_repository->parsed_objects->grafts_nr--; | |
f53514bc JS |
258 | return 0; |
259 | } | |
260 | ||
8597ea3a JK |
261 | struct commit_buffer { |
262 | void *buffer; | |
263 | unsigned long size; | |
264 | }; | |
265 | define_commit_slab(buffer_slab, struct commit_buffer); | |
c1b3c71f | 266 | |
65ea9d4b | 267 | struct buffer_slab *allocate_commit_buffer_slab(void) |
66c2827e | 268 | { |
65ea9d4b SB |
269 | struct buffer_slab *bs = xmalloc(sizeof(*bs)); |
270 | init_buffer_slab(bs); | |
271 | return bs; | |
272 | } | |
273 | ||
274 | void free_commit_buffer_slab(struct buffer_slab *bs) | |
275 | { | |
276 | clear_buffer_slab(bs); | |
277 | free(bs); | |
278 | } | |
c1b3c71f | 279 | |
1a40fc45 | 280 | void set_commit_buffer(struct repository *r, struct commit *commit, void *buffer, unsigned long size) |
66c2827e | 281 | { |
65ea9d4b | 282 | struct commit_buffer *v = buffer_slab_at( |
1a40fc45 | 283 | r->parsed_objects->buffer_slab, commit); |
8597ea3a JK |
284 | v->buffer = buffer; |
285 | v->size = size; | |
66c2827e JK |
286 | } |
287 | ||
4ff7e5c9 | 288 | const void *get_cached_commit_buffer(struct repository *r, const struct commit *commit, unsigned long *sizep) |
152ff1cc | 289 | { |
65ea9d4b | 290 | struct commit_buffer *v = buffer_slab_peek( |
4ff7e5c9 | 291 | r->parsed_objects->buffer_slab, commit); |
862e730e JH |
292 | if (!v) { |
293 | if (sizep) | |
294 | *sizep = 0; | |
295 | return NULL; | |
296 | } | |
8597ea3a JK |
297 | if (sizep) |
298 | *sizep = v->size; | |
299 | return v->buffer; | |
152ff1cc JK |
300 | } |
301 | ||
8597ea3a | 302 | const void *get_commit_buffer(const struct commit *commit, unsigned long *sizep) |
152ff1cc | 303 | { |
3ce85f7e | 304 | const void *ret = get_cached_commit_buffer(the_repository, commit, sizep); |
152ff1cc JK |
305 | if (!ret) { |
306 | enum object_type type; | |
307 | unsigned long size; | |
b4f5aca4 | 308 | ret = read_object_file(&commit->object.oid, &type, &size); |
152ff1cc JK |
309 | if (!ret) |
310 | die("cannot read commit object %s", | |
f2fd0760 | 311 | oid_to_hex(&commit->object.oid)); |
152ff1cc JK |
312 | if (type != OBJ_COMMIT) |
313 | die("expected commit for %s, got %s", | |
debca9d2 | 314 | oid_to_hex(&commit->object.oid), type_name(type)); |
8597ea3a JK |
315 | if (sizep) |
316 | *sizep = size; | |
152ff1cc JK |
317 | } |
318 | return ret; | |
319 | } | |
320 | ||
321 | void unuse_commit_buffer(const struct commit *commit, const void *buffer) | |
322 | { | |
65ea9d4b SB |
323 | struct commit_buffer *v = buffer_slab_peek( |
324 | the_repository->parsed_objects->buffer_slab, commit); | |
862e730e | 325 | if (!(v && v->buffer == buffer)) |
152ff1cc JK |
326 | free((void *)buffer); |
327 | } | |
328 | ||
0fb370da JK |
329 | void free_commit_buffer(struct commit *commit) |
330 | { | |
65ea9d4b SB |
331 | struct commit_buffer *v = buffer_slab_peek( |
332 | the_repository->parsed_objects->buffer_slab, commit); | |
862e730e | 333 | if (v) { |
6a83d902 | 334 | FREE_AND_NULL(v->buffer); |
862e730e JH |
335 | v->size = 0; |
336 | } | |
0fb370da JK |
337 | } |
338 | ||
5bb03de1 DS |
339 | struct tree *get_commit_tree(const struct commit *commit) |
340 | { | |
7b8a21db DS |
341 | if (commit->maybe_tree || !commit->object.parsed) |
342 | return commit->maybe_tree; | |
343 | ||
344 | if (commit->graph_pos == COMMIT_NOT_FROM_GRAPH) | |
345 | BUG("commit has NULL tree, but was not loaded from commit-graph"); | |
346 | ||
dade47c0 | 347 | return get_commit_tree_in_graph(the_repository, commit); |
5bb03de1 DS |
348 | } |
349 | ||
350 | struct object_id *get_commit_tree_oid(const struct commit *commit) | |
351 | { | |
352 | return &get_commit_tree(commit)->object.oid; | |
353 | } | |
354 | ||
14ba97f8 SB |
355 | void release_commit_memory(struct commit *c) |
356 | { | |
11024058 | 357 | c->maybe_tree = NULL; |
14ba97f8 SB |
358 | c->index = 0; |
359 | free_commit_buffer(c); | |
360 | free_commit_list(c->parents); | |
361 | /* TODO: what about commit->util? */ | |
362 | ||
363 | c->object.parsed = 0; | |
364 | } | |
365 | ||
8597ea3a | 366 | const void *detach_commit_buffer(struct commit *commit, unsigned long *sizep) |
0fb370da | 367 | { |
65ea9d4b SB |
368 | struct commit_buffer *v = buffer_slab_peek( |
369 | the_repository->parsed_objects->buffer_slab, commit); | |
8597ea3a JK |
370 | void *ret; |
371 | ||
862e730e JH |
372 | if (!v) { |
373 | if (sizep) | |
374 | *sizep = 0; | |
375 | return NULL; | |
376 | } | |
8597ea3a JK |
377 | ret = v->buffer; |
378 | if (sizep) | |
379 | *sizep = v->size; | |
380 | ||
381 | v->buffer = NULL; | |
382 | v->size = 0; | |
0fb370da JK |
383 | return ret; |
384 | } | |
385 | ||
fd8030c7 | 386 | int parse_commit_buffer(struct repository *r, struct commit *item, const void *buffer, unsigned long size, int check_graph) |
175785e5 | 387 | { |
cf7b1cad NTND |
388 | const char *tail = buffer; |
389 | const char *bufptr = buffer; | |
7683e2e6 | 390 | struct object_id parent; |
6c88be16 | 391 | struct commit_list **pptr; |
5da5c8f4 | 392 | struct commit_graft *graft; |
2770ccbd | 393 | const int tree_entry_len = the_hash_algo->hexsz + 5; |
394 | const int parent_entry_len = the_hash_algo->hexsz + 7; | |
bd2c39f5 | 395 | |
175785e5 DB |
396 | if (item->object.parsed) |
397 | return 0; | |
398 | item->object.parsed = 1; | |
3b44f15a | 399 | tail += size; |
7683e2e6 | 400 | if (tail <= bufptr + tree_entry_len + 1 || memcmp(bufptr, "tree ", 5) || |
401 | bufptr[tree_entry_len] != '\n') | |
f2fd0760 | 402 | return error("bogus commit object %s", oid_to_hex(&item->object.oid)); |
26ea3e7d | 403 | if (get_oid_hex(bufptr + 5, &parent) < 0) |
bd2afde8 | 404 | return error("bad tree pointer in commit %s", |
f2fd0760 | 405 | oid_to_hex(&item->object.oid)); |
fd8030c7 | 406 | item->maybe_tree = lookup_tree(r, &parent); |
7683e2e6 | 407 | bufptr += tree_entry_len + 1; /* "tree " + "hex sha1" + "\n" */ |
6c88be16 | 408 | pptr = &item->parents; |
5da5c8f4 | 409 | |
fd8030c7 | 410 | graft = lookup_commit_graft(r, &item->object.oid); |
7683e2e6 | 411 | while (bufptr + parent_entry_len < tail && !memcmp(bufptr, "parent ", 7)) { |
f7cc77d7 LT |
412 | struct commit *new_parent; |
413 | ||
7683e2e6 | 414 | if (tail <= bufptr + parent_entry_len + 1 || |
26ea3e7d | 415 | get_oid_hex(bufptr + 7, &parent) || |
7683e2e6 | 416 | bufptr[parent_entry_len] != '\n') |
f2fd0760 | 417 | return error("bad parents in commit %s", oid_to_hex(&item->object.oid)); |
7683e2e6 | 418 | bufptr += parent_entry_len + 1; |
7f3140cd JS |
419 | /* |
420 | * The clone is shallow if nr_parent < 0, and we must | |
421 | * not traverse its real parents even when we unhide them. | |
422 | */ | |
423 | if (graft && (graft->nr_parent < 0 || grafts_replace_parents)) | |
5da5c8f4 | 424 | continue; |
fd8030c7 | 425 | new_parent = lookup_commit(r, &parent); |
39468def | 426 | if (new_parent) |
6c88be16 | 427 | pptr = &commit_list_insert(new_parent, pptr)->next; |
5da5c8f4 JH |
428 | } |
429 | if (graft) { | |
430 | int i; | |
431 | struct commit *new_parent; | |
432 | for (i = 0; i < graft->nr_parent; i++) { | |
fd8030c7 | 433 | new_parent = lookup_commit(r, |
c1f5eb49 | 434 | &graft->parent[i]); |
5da5c8f4 JH |
435 | if (!new_parent) |
436 | continue; | |
437 | pptr = &commit_list_insert(new_parent, pptr)->next; | |
5da5c8f4 | 438 | } |
175785e5 | 439 | } |
0a617799 | 440 | item->date = parse_commit_date(bufptr, tail); |
27dedf0c | 441 | |
e2838d85 | 442 | if (check_graph) |
dade47c0 | 443 | load_commit_graph_info(the_repository, item); |
e2838d85 | 444 | |
175785e5 DB |
445 | return 0; |
446 | } | |
447 | ||
9b19adac | 448 | int parse_commit_internal(struct commit *item, int quiet_on_missing, int use_commit_graph) |
bd2c39f5 | 449 | { |
21666f1a | 450 | enum object_type type; |
bd2c39f5 NP |
451 | void *buffer; |
452 | unsigned long size; | |
453 | int ret; | |
454 | ||
9786f68b MK |
455 | if (!item) |
456 | return -1; | |
bd2c39f5 NP |
457 | if (item->object.parsed) |
458 | return 0; | |
dade47c0 | 459 | if (use_commit_graph && parse_commit_in_graph(the_repository, item)) |
177722b3 | 460 | return 0; |
b4f5aca4 | 461 | buffer = read_object_file(&item->object.oid, &type, &size); |
bd2c39f5 | 462 | if (!buffer) |
9cc2b07a JK |
463 | return quiet_on_missing ? -1 : |
464 | error("Could not read %s", | |
f2fd0760 | 465 | oid_to_hex(&item->object.oid)); |
21666f1a | 466 | if (type != OBJ_COMMIT) { |
bd2c39f5 NP |
467 | free(buffer); |
468 | return error("Object %s not a commit", | |
f2fd0760 | 469 | oid_to_hex(&item->object.oid)); |
bd2c39f5 | 470 | } |
9b19adac | 471 | |
08f4f445 | 472 | ret = parse_commit_buffer(the_repository, item, buffer, size, 0); |
60ab26de | 473 | if (save_commit_buffer && !ret) { |
5e0c6360 | 474 | set_commit_buffer(the_repository, item, buffer, size); |
3ff1fbbb LT |
475 | return 0; |
476 | } | |
bd2c39f5 NP |
477 | free(buffer); |
478 | return ret; | |
479 | } | |
480 | ||
9b19adac DS |
481 | int parse_commit_gently(struct commit *item, int quiet_on_missing) |
482 | { | |
483 | return parse_commit_internal(item, quiet_on_missing, 1); | |
484 | } | |
485 | ||
7059dccc JK |
486 | void parse_commit_or_die(struct commit *item) |
487 | { | |
488 | if (parse_commit(item)) | |
489 | die("unable to parse commit %s", | |
f2fd0760 | 490 | item ? oid_to_hex(&item->object.oid) : "(null)"); |
7059dccc JK |
491 | } |
492 | ||
11af2aae CC |
493 | int find_commit_subject(const char *commit_buffer, const char **subject) |
494 | { | |
495 | const char *eol; | |
496 | const char *p = commit_buffer; | |
497 | ||
498 | while (*p && (*p != '\n' || p[1] != '\n')) | |
499 | p++; | |
500 | if (*p) { | |
4e1b06da | 501 | p = skip_blank_lines(p + 2); |
9c9b03b1 | 502 | eol = strchrnul(p, '\n'); |
11af2aae CC |
503 | } else |
504 | eol = p; | |
505 | ||
506 | *subject = p; | |
507 | ||
508 | return eol - p; | |
509 | } | |
510 | ||
ac5155ef | 511 | struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p) |
dd97f850 | 512 | { |
812666c8 | 513 | struct commit_list *new_list = xmalloc(sizeof(struct commit_list)); |
dd97f850 DB |
514 | new_list->item = item; |
515 | new_list->next = *list_p; | |
516 | *list_p = new_list; | |
ac5155ef | 517 | return new_list; |
dd97f850 DB |
518 | } |
519 | ||
65319475 MV |
520 | unsigned commit_list_count(const struct commit_list *l) |
521 | { | |
522 | unsigned c = 0; | |
523 | for (; l; l = l->next ) | |
524 | c++; | |
525 | return c; | |
526 | } | |
527 | ||
53d00b39 TR |
528 | struct commit_list *copy_commit_list(struct commit_list *list) |
529 | { | |
530 | struct commit_list *head = NULL; | |
531 | struct commit_list **pp = &head; | |
532 | while (list) { | |
cb979dbd | 533 | pp = commit_list_append(list->item, pp); |
53d00b39 TR |
534 | list = list->next; |
535 | } | |
536 | return head; | |
537 | } | |
538 | ||
175785e5 DB |
539 | void free_commit_list(struct commit_list *list) |
540 | { | |
e510ab89 RS |
541 | while (list) |
542 | pop_commit(&list); | |
175785e5 | 543 | } |
dd97f850 | 544 | |
47e44ed1 | 545 | struct commit_list * commit_list_insert_by_date(struct commit *item, struct commit_list **list) |
dd97f850 DB |
546 | { |
547 | struct commit_list **pp = list; | |
548 | struct commit_list *p; | |
549 | while ((p = *pp) != NULL) { | |
550 | if (p->item->date < item->date) { | |
551 | break; | |
552 | } | |
553 | pp = &p->next; | |
554 | } | |
f755494c | 555 | return commit_list_insert(item, pp); |
dd97f850 DB |
556 | } |
557 | ||
46905893 RS |
558 | static int commit_list_compare_by_date(const void *a, const void *b) |
559 | { | |
dddbad72 JS |
560 | timestamp_t a_date = ((const struct commit_list *)a)->item->date; |
561 | timestamp_t b_date = ((const struct commit_list *)b)->item->date; | |
46905893 RS |
562 | if (a_date < b_date) |
563 | return 1; | |
564 | if (a_date > b_date) | |
565 | return -1; | |
566 | return 0; | |
567 | } | |
568 | ||
569 | static void *commit_list_get_next(const void *a) | |
570 | { | |
571 | return ((const struct commit_list *)a)->next; | |
572 | } | |
573 | ||
574 | static void commit_list_set_next(void *a, void *next) | |
575 | { | |
576 | ((struct commit_list *)a)->next = next; | |
577 | } | |
a6080a0a | 578 | |
47e44ed1 | 579 | void commit_list_sort_by_date(struct commit_list **list) |
dd97f850 | 580 | { |
7365c95d JH |
581 | *list = llist_mergesort(*list, commit_list_get_next, commit_list_set_next, |
582 | commit_list_compare_by_date); | |
dd97f850 DB |
583 | } |
584 | ||
58e28af6 DB |
585 | struct commit *pop_most_recent_commit(struct commit_list **list, |
586 | unsigned int mark) | |
dd97f850 | 587 | { |
e510ab89 | 588 | struct commit *ret = pop_commit(list); |
dd97f850 | 589 | struct commit_list *parents = ret->parents; |
dd97f850 DB |
590 | |
591 | while (parents) { | |
4056c091 | 592 | struct commit *commit = parents->item; |
dec38c81 | 593 | if (!parse_commit(commit) && !(commit->object.flags & mark)) { |
58e28af6 | 594 | commit->object.flags |= mark; |
47e44ed1 | 595 | commit_list_insert_by_date(commit, list); |
4056c091 | 596 | } |
dd97f850 DB |
597 | parents = parents->next; |
598 | } | |
599 | return ret; | |
600 | } | |
e3bc7a3b | 601 | |
941ba8db NTND |
602 | static void clear_commit_marks_1(struct commit_list **plist, |
603 | struct commit *commit, unsigned int mark) | |
f8f9c73c | 604 | { |
60fcc2e6 JS |
605 | while (commit) { |
606 | struct commit_list *parents; | |
f8f9c73c | 607 | |
60fcc2e6 JS |
608 | if (!(mark & commit->object.flags)) |
609 | return; | |
58ecf5c1 | 610 | |
60fcc2e6 JS |
611 | commit->object.flags &= ~mark; |
612 | ||
613 | parents = commit->parents; | |
614 | if (!parents) | |
615 | return; | |
616 | ||
617 | while ((parents = parents->next)) | |
941ba8db | 618 | commit_list_insert(parents->item, plist); |
60fcc2e6 JS |
619 | |
620 | commit = commit->parents->item; | |
f8f9c73c JH |
621 | } |
622 | } | |
623 | ||
e895cb51 | 624 | void clear_commit_marks_many(int nr, struct commit **commit, unsigned int mark) |
941ba8db NTND |
625 | { |
626 | struct commit_list *list = NULL; | |
e895cb51 JH |
627 | |
628 | while (nr--) { | |
07f7d55a | 629 | clear_commit_marks_1(&list, *commit, mark); |
e895cb51 JH |
630 | commit++; |
631 | } | |
941ba8db NTND |
632 | while (list) |
633 | clear_commit_marks_1(&list, pop_commit(&list), mark); | |
634 | } | |
635 | ||
e895cb51 JH |
636 | void clear_commit_marks(struct commit *commit, unsigned int mark) |
637 | { | |
638 | clear_commit_marks_many(1, &commit, mark); | |
639 | } | |
640 | ||
a3437b8c JS |
641 | struct commit *pop_commit(struct commit_list **stack) |
642 | { | |
643 | struct commit_list *top = *stack; | |
644 | struct commit *item = top ? top->item : NULL; | |
645 | ||
646 | if (top) { | |
647 | *stack = top->next; | |
648 | free(top); | |
649 | } | |
650 | return item; | |
651 | } | |
652 | ||
a84b794a JH |
653 | /* |
654 | * Topological sort support | |
655 | */ | |
96c4f4a3 | 656 | |
a84b794a JH |
657 | /* count number of children that have not been emitted */ |
658 | define_commit_slab(indegree_slab, int); | |
96c4f4a3 | 659 | |
81c6b38b | 660 | /* record author-date for each commit object */ |
18207030 | 661 | define_commit_slab(author_date_slab, timestamp_t); |
81c6b38b JH |
662 | |
663 | static void record_author_date(struct author_date_slab *author_date, | |
664 | struct commit *commit) | |
665 | { | |
8597ea3a | 666 | const char *buffer = get_commit_buffer(commit, NULL); |
81c6b38b | 667 | struct ident_split ident; |
ea5517f0 JK |
668 | const char *ident_line; |
669 | size_t ident_len; | |
81c6b38b | 670 | char *date_end; |
dddbad72 | 671 | timestamp_t date; |
81c6b38b | 672 | |
ea5517f0 JK |
673 | ident_line = find_commit_header(buffer, "author", &ident_len); |
674 | if (!ident_line) | |
675 | goto fail_exit; /* no author line */ | |
676 | if (split_ident_line(&ident, ident_line, ident_len) || | |
677 | !ident.date_begin || !ident.date_end) | |
678 | goto fail_exit; /* malformed "author" line */ | |
81c6b38b | 679 | |
1aeb7e75 | 680 | date = parse_timestamp(ident.date_begin, &date_end, 10); |
81c6b38b JH |
681 | if (date_end != ident.date_end) |
682 | goto fail_exit; /* malformed date */ | |
683 | *(author_date_slab_at(author_date, commit)) = date; | |
684 | ||
685 | fail_exit: | |
ba41c1c9 | 686 | unuse_commit_buffer(commit, buffer); |
81c6b38b JH |
687 | } |
688 | ||
689 | static int compare_commits_by_author_date(const void *a_, const void *b_, | |
690 | void *cb_data) | |
691 | { | |
692 | const struct commit *a = a_, *b = b_; | |
693 | struct author_date_slab *author_date = cb_data; | |
dddbad72 JS |
694 | timestamp_t a_date = *(author_date_slab_at(author_date, a)); |
695 | timestamp_t b_date = *(author_date_slab_at(author_date, b)); | |
81c6b38b JH |
696 | |
697 | /* newer commits with larger date first */ | |
698 | if (a_date < b_date) | |
699 | return 1; | |
700 | else if (a_date > b_date) | |
701 | return -1; | |
702 | return 0; | |
703 | } | |
704 | ||
3afc679b DS |
705 | int compare_commits_by_gen_then_commit_date(const void *a_, const void *b_, void *unused) |
706 | { | |
707 | const struct commit *a = a_, *b = b_; | |
708 | ||
709 | /* newer commits first */ | |
710 | if (a->generation < b->generation) | |
711 | return 1; | |
712 | else if (a->generation > b->generation) | |
713 | return -1; | |
714 | ||
715 | /* use date as a heuristic when generations are equal */ | |
716 | if (a->date < b->date) | |
717 | return 1; | |
718 | else if (a->date > b->date) | |
719 | return -1; | |
720 | return 0; | |
721 | } | |
722 | ||
727377ff | 723 | int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused) |
da24b104 JH |
724 | { |
725 | const struct commit *a = a_, *b = b_; | |
726 | /* newer commits with larger date first */ | |
727 | if (a->date < b->date) | |
728 | return 1; | |
729 | else if (a->date > b->date) | |
730 | return -1; | |
731 | return 0; | |
732 | } | |
733 | ||
ab580ace JS |
734 | /* |
735 | * Performs an in-place topological sort on the list supplied. | |
736 | */ | |
da24b104 | 737 | void sort_in_topological_order(struct commit_list **list, enum rev_sort_order sort_order) |
6b6dcfc2 | 738 | { |
23c17d4a | 739 | struct commit_list *next, *orig = *list; |
23c17d4a | 740 | struct commit_list **pptr; |
a84b794a | 741 | struct indegree_slab indegree; |
da24b104 JH |
742 | struct prio_queue queue; |
743 | struct commit *commit; | |
81c6b38b | 744 | struct author_date_slab author_date; |
a6080a0a | 745 | |
23c17d4a | 746 | if (!orig) |
7d6fb370 | 747 | return; |
23c17d4a LT |
748 | *list = NULL; |
749 | ||
a84b794a | 750 | init_indegree_slab(&indegree); |
da24b104 | 751 | memset(&queue, '\0', sizeof(queue)); |
81c6b38b | 752 | |
da24b104 JH |
753 | switch (sort_order) { |
754 | default: /* REV_SORT_IN_GRAPH_ORDER */ | |
755 | queue.compare = NULL; | |
756 | break; | |
757 | case REV_SORT_BY_COMMIT_DATE: | |
758 | queue.compare = compare_commits_by_commit_date; | |
759 | break; | |
81c6b38b JH |
760 | case REV_SORT_BY_AUTHOR_DATE: |
761 | init_author_date_slab(&author_date); | |
762 | queue.compare = compare_commits_by_author_date; | |
763 | queue.cb_data = &author_date; | |
764 | break; | |
da24b104 | 765 | } |
96c4f4a3 | 766 | |
23c17d4a LT |
767 | /* Mark them and clear the indegree */ |
768 | for (next = orig; next; next = next->next) { | |
769 | struct commit *commit = next->item; | |
a84b794a | 770 | *(indegree_slab_at(&indegree, commit)) = 1; |
81c6b38b JH |
771 | /* also record the author dates, if needed */ |
772 | if (sort_order == REV_SORT_BY_AUTHOR_DATE) | |
773 | record_author_date(&author_date, commit); | |
ab580ace | 774 | } |
23c17d4a | 775 | |
ab580ace | 776 | /* update the indegree */ |
23c17d4a | 777 | for (next = orig; next; next = next->next) { |
da24b104 | 778 | struct commit_list *parents = next->item->parents; |
ab580ace | 779 | while (parents) { |
23c17d4a | 780 | struct commit *parent = parents->item; |
a84b794a | 781 | int *pi = indegree_slab_at(&indegree, parent); |
6b6dcfc2 | 782 | |
96c4f4a3 JK |
783 | if (*pi) |
784 | (*pi)++; | |
23c17d4a | 785 | parents = parents->next; |
ab580ace | 786 | } |
ab580ace | 787 | } |
23c17d4a | 788 | |
a6080a0a | 789 | /* |
674d1727 PH |
790 | * find the tips |
791 | * | |
792 | * tips are nodes not reachable from any other node in the list | |
793 | * | |
794 | * the tips serve as a starting set for the work queue. | |
795 | */ | |
23c17d4a LT |
796 | for (next = orig; next; next = next->next) { |
797 | struct commit *commit = next->item; | |
ab580ace | 798 | |
a84b794a | 799 | if (*(indegree_slab_at(&indegree, commit)) == 1) |
da24b104 | 800 | prio_queue_put(&queue, commit); |
ab580ace | 801 | } |
4c8725f1 | 802 | |
da24b104 JH |
803 | /* |
804 | * This is unfortunate; the initial tips need to be shown | |
805 | * in the order given from the revision traversal machinery. | |
806 | */ | |
807 | if (sort_order == REV_SORT_IN_GRAPH_ORDER) | |
808 | prio_queue_reverse(&queue); | |
809 | ||
810 | /* We no longer need the commit list */ | |
811 | free_commit_list(orig); | |
23c17d4a LT |
812 | |
813 | pptr = list; | |
814 | *list = NULL; | |
da24b104 JH |
815 | while ((commit = prio_queue_get(&queue)) != NULL) { |
816 | struct commit_list *parents; | |
23c17d4a | 817 | |
23c17d4a | 818 | for (parents = commit->parents; parents ; parents = parents->next) { |
cd2b8ae9 | 819 | struct commit *parent = parents->item; |
a84b794a | 820 | int *pi = indegree_slab_at(&indegree, parent); |
23c17d4a | 821 | |
96c4f4a3 | 822 | if (!*pi) |
23c17d4a LT |
823 | continue; |
824 | ||
825 | /* | |
826 | * parents are only enqueued for emission | |
827 | * when all their children have been emitted thereby | |
828 | * guaranteeing topological order. | |
829 | */ | |
da24b104 JH |
830 | if (--(*pi) == 1) |
831 | prio_queue_put(&queue, parent); | |
ab580ace JS |
832 | } |
833 | /* | |
da24b104 JH |
834 | * all children of commit have already been |
835 | * emitted. we can emit it now. | |
674d1727 | 836 | */ |
a84b794a | 837 | *(indegree_slab_at(&indegree, commit)) = 0; |
da24b104 JH |
838 | |
839 | pptr = &commit_list_insert(commit, pptr)->next; | |
ab580ace | 840 | } |
96c4f4a3 | 841 | |
a84b794a | 842 | clear_indegree_slab(&indegree); |
da24b104 | 843 | clear_prio_queue(&queue); |
81c6b38b JH |
844 | if (sort_order == REV_SORT_BY_AUTHOR_DATE) |
845 | clear_author_date_slab(&author_date); | |
ab580ace | 846 | } |
7c6f8aaf | 847 | |
103148aa PK |
848 | struct rev_collect { |
849 | struct commit **commit; | |
850 | int nr; | |
851 | int alloc; | |
852 | unsigned int initial : 1; | |
853 | }; | |
854 | ||
855 | static void add_one_commit(struct object_id *oid, struct rev_collect *revs) | |
856 | { | |
857 | struct commit *commit; | |
858 | ||
859 | if (is_null_oid(oid)) | |
860 | return; | |
861 | ||
862 | commit = lookup_commit(the_repository, oid); | |
863 | if (!commit || | |
864 | (commit->object.flags & TMP_MARK) || | |
865 | parse_commit(commit)) | |
866 | return; | |
867 | ||
868 | ALLOC_GROW(revs->commit, revs->nr + 1, revs->alloc); | |
869 | revs->commit[revs->nr++] = commit; | |
870 | commit->object.flags |= TMP_MARK; | |
871 | } | |
872 | ||
873 | static int collect_one_reflog_ent(struct object_id *ooid, struct object_id *noid, | |
874 | const char *ident, timestamp_t timestamp, | |
875 | int tz, const char *message, void *cbdata) | |
876 | { | |
877 | struct rev_collect *revs = cbdata; | |
878 | ||
879 | if (revs->initial) { | |
880 | revs->initial = 0; | |
881 | add_one_commit(ooid, revs); | |
882 | } | |
883 | add_one_commit(noid, revs); | |
884 | return 0; | |
885 | } | |
886 | ||
887 | struct commit *get_fork_point(const char *refname, struct commit *commit) | |
888 | { | |
889 | struct object_id oid; | |
890 | struct rev_collect revs; | |
891 | struct commit_list *bases; | |
892 | int i; | |
893 | struct commit *ret = NULL; | |
894 | ||
895 | memset(&revs, 0, sizeof(revs)); | |
896 | revs.initial = 1; | |
897 | for_each_reflog_ent(refname, collect_one_reflog_ent, &revs); | |
898 | ||
899 | if (!revs.nr && !get_oid(refname, &oid)) | |
900 | add_one_commit(&oid, &revs); | |
901 | ||
902 | for (i = 0; i < revs.nr; i++) | |
903 | revs.commit[i]->object.flags &= ~TMP_MARK; | |
904 | ||
905 | bases = get_merge_bases_many(commit, revs.nr, revs.commit); | |
906 | ||
907 | /* | |
908 | * There should be one and only one merge base, when we found | |
909 | * a common ancestor among reflog entries. | |
910 | */ | |
911 | if (!bases || bases->next) | |
912 | goto cleanup_return; | |
913 | ||
914 | /* And the found one must be one of the reflog entries */ | |
915 | for (i = 0; i < revs.nr; i++) | |
916 | if (&bases->item->object == &revs.commit[i]->object) | |
917 | break; /* found */ | |
918 | if (revs.nr <= i) | |
919 | goto cleanup_return; | |
920 | ||
921 | ret = bases->item; | |
922 | ||
923 | cleanup_return: | |
924 | free_commit_list(bases); | |
925 | return ret; | |
926 | } | |
927 | ||
ba3c69a9 JH |
928 | static const char gpg_sig_header[] = "gpgsig"; |
929 | static const int gpg_sig_header_len = sizeof(gpg_sig_header) - 1; | |
930 | ||
931 | static int do_sign_commit(struct strbuf *buf, const char *keyid) | |
932 | { | |
933 | struct strbuf sig = STRBUF_INIT; | |
934 | int inspos, copypos; | |
3324dd8f | 935 | const char *eoh; |
ba3c69a9 JH |
936 | |
937 | /* find the end of the header */ | |
3324dd8f JS |
938 | eoh = strstr(buf->buf, "\n\n"); |
939 | if (!eoh) | |
940 | inspos = buf->len; | |
941 | else | |
942 | inspos = eoh - buf->buf + 1; | |
ba3c69a9 JH |
943 | |
944 | if (!keyid || !*keyid) | |
945 | keyid = get_signing_key(); | |
946 | if (sign_buffer(buf, &sig, keyid)) { | |
947 | strbuf_release(&sig); | |
948 | return -1; | |
949 | } | |
950 | ||
951 | for (copypos = 0; sig.buf[copypos]; ) { | |
952 | const char *bol = sig.buf + copypos; | |
953 | const char *eol = strchrnul(bol, '\n'); | |
954 | int len = (eol - bol) + !!*eol; | |
955 | ||
956 | if (!copypos) { | |
957 | strbuf_insert(buf, inspos, gpg_sig_header, gpg_sig_header_len); | |
958 | inspos += gpg_sig_header_len; | |
959 | } | |
960 | strbuf_insert(buf, inspos++, " ", 1); | |
961 | strbuf_insert(buf, inspos, bol, len); | |
962 | inspos += len; | |
963 | copypos += len; | |
964 | } | |
965 | strbuf_release(&sig); | |
966 | return 0; | |
967 | } | |
968 | ||
218aa3a6 | 969 | int parse_signed_commit(const struct commit *commit, |
0c37f1fc JH |
970 | struct strbuf *payload, struct strbuf *signature) |
971 | { | |
218aa3a6 | 972 | |
0c37f1fc | 973 | unsigned long size; |
218aa3a6 | 974 | const char *buffer = get_commit_buffer(commit, &size); |
0c37f1fc | 975 | int in_signature, saw_signature = -1; |
218aa3a6 | 976 | const char *line, *tail; |
0c37f1fc JH |
977 | |
978 | line = buffer; | |
979 | tail = buffer + size; | |
980 | in_signature = 0; | |
981 | saw_signature = 0; | |
982 | while (line < tail) { | |
983 | const char *sig = NULL; | |
218aa3a6 | 984 | const char *next = memchr(line, '\n', tail - line); |
0c37f1fc JH |
985 | |
986 | next = next ? next + 1 : tail; | |
987 | if (in_signature && line[0] == ' ') | |
988 | sig = line + 1; | |
59556548 | 989 | else if (starts_with(line, gpg_sig_header) && |
0c37f1fc JH |
990 | line[gpg_sig_header_len] == ' ') |
991 | sig = line + gpg_sig_header_len + 1; | |
992 | if (sig) { | |
993 | strbuf_add(signature, sig, next - sig); | |
994 | saw_signature = 1; | |
995 | in_signature = 1; | |
996 | } else { | |
997 | if (*line == '\n') | |
998 | /* dump the whole remainder of the buffer */ | |
999 | next = tail; | |
1000 | strbuf_add(payload, line, next - line); | |
1001 | in_signature = 0; | |
1002 | } | |
1003 | line = next; | |
1004 | } | |
218aa3a6 | 1005 | unuse_commit_buffer(commit, buffer); |
0c37f1fc JH |
1006 | return saw_signature; |
1007 | } | |
1008 | ||
0b05ab6f CC |
1009 | int remove_signature(struct strbuf *buf) |
1010 | { | |
1011 | const char *line = buf->buf; | |
1012 | const char *tail = buf->buf + buf->len; | |
1013 | int in_signature = 0; | |
1014 | const char *sig_start = NULL; | |
1015 | const char *sig_end = NULL; | |
1016 | ||
1017 | while (line < tail) { | |
1018 | const char *next = memchr(line, '\n', tail - line); | |
1019 | next = next ? next + 1 : tail; | |
1020 | ||
1021 | if (in_signature && line[0] == ' ') | |
1022 | sig_end = next; | |
1023 | else if (starts_with(line, gpg_sig_header) && | |
1024 | line[gpg_sig_header_len] == ' ') { | |
1025 | sig_start = line; | |
1026 | sig_end = next; | |
1027 | in_signature = 1; | |
1028 | } else { | |
1029 | if (*line == '\n') | |
1030 | /* dump the whole remainder of the buffer */ | |
1031 | next = tail; | |
1032 | in_signature = 0; | |
1033 | } | |
1034 | line = next; | |
1035 | } | |
1036 | ||
1037 | if (sig_start) | |
1038 | strbuf_remove(buf, sig_start - buf->buf, sig_end - sig_start); | |
1039 | ||
1040 | return sig_start != NULL; | |
1041 | } | |
1042 | ||
5231c633 JH |
1043 | static void handle_signed_tag(struct commit *parent, struct commit_extra_header ***tail) |
1044 | { | |
1045 | struct merge_remote_desc *desc; | |
1046 | struct commit_extra_header *mergetag; | |
1047 | char *buf; | |
1048 | unsigned long size, len; | |
1049 | enum object_type type; | |
1050 | ||
1051 | desc = merge_remote_util(parent); | |
1052 | if (!desc || !desc->obj) | |
1053 | return; | |
b4f5aca4 | 1054 | buf = read_object_file(&desc->obj->oid, &type, &size); |
5231c633 JH |
1055 | if (!buf || type != OBJ_TAG) |
1056 | goto free_return; | |
1057 | len = parse_signature(buf, size); | |
1058 | if (size == len) | |
1059 | goto free_return; | |
1060 | /* | |
1061 | * We could verify this signature and either omit the tag when | |
1062 | * it does not validate, but the integrator may not have the | |
1063 | * public key of the signer of the tag he is merging, while a | |
1064 | * later auditor may have it while auditing, so let's not run | |
1065 | * verify-signed-buffer here for now... | |
1066 | * | |
1067 | * if (verify_signed_buffer(buf, len, buf + len, size - len, ...)) | |
1068 | * warn("warning: signed tag unverified."); | |
1069 | */ | |
1070 | mergetag = xcalloc(1, sizeof(*mergetag)); | |
1071 | mergetag->key = xstrdup("mergetag"); | |
1072 | mergetag->value = buf; | |
1073 | mergetag->len = size; | |
1074 | ||
1075 | **tail = mergetag; | |
1076 | *tail = &mergetag->next; | |
1077 | return; | |
1078 | ||
1079 | free_return: | |
1080 | free(buf); | |
1081 | } | |
1082 | ||
434060ec | 1083 | int check_commit_signature(const struct commit *commit, struct signature_check *sigc) |
ffb6d7d5 SG |
1084 | { |
1085 | struct strbuf payload = STRBUF_INIT; | |
1086 | struct strbuf signature = STRBUF_INIT; | |
434060ec | 1087 | int ret = 1; |
ffb6d7d5 SG |
1088 | |
1089 | sigc->result = 'N'; | |
1090 | ||
218aa3a6 | 1091 | if (parse_signed_commit(commit, &payload, &signature) <= 0) |
ffb6d7d5 | 1092 | goto out; |
434060ec | 1093 | ret = check_signature(payload.buf, payload.len, signature.buf, |
1094 | signature.len, sigc); | |
ffb6d7d5 SG |
1095 | |
1096 | out: | |
ffb6d7d5 SG |
1097 | strbuf_release(&payload); |
1098 | strbuf_release(&signature); | |
434060ec | 1099 | |
1100 | return ret; | |
ffb6d7d5 SG |
1101 | } |
1102 | ||
1103 | ||
1104 | ||
5231c633 JH |
1105 | void append_merge_tag_headers(struct commit_list *parents, |
1106 | struct commit_extra_header ***tail) | |
1107 | { | |
1108 | while (parents) { | |
1109 | struct commit *parent = parents->item; | |
1110 | handle_signed_tag(parent, tail); | |
1111 | parents = parents->next; | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | static void add_extra_header(struct strbuf *buffer, | |
1116 | struct commit_extra_header *extra) | |
1117 | { | |
1118 | strbuf_addstr(buffer, extra->key); | |
ed7a42a0 JH |
1119 | if (extra->len) |
1120 | strbuf_add_lines(buffer, " ", extra->value, extra->len); | |
1121 | else | |
1122 | strbuf_addch(buffer, '\n'); | |
1123 | } | |
1124 | ||
c871a1d1 JH |
1125 | struct commit_extra_header *read_commit_extra_headers(struct commit *commit, |
1126 | const char **exclude) | |
ed7a42a0 JH |
1127 | { |
1128 | struct commit_extra_header *extra = NULL; | |
1129 | unsigned long size; | |
218aa3a6 JK |
1130 | const char *buffer = get_commit_buffer(commit, &size); |
1131 | extra = read_commit_extra_header_lines(buffer, size, exclude); | |
1132 | unuse_commit_buffer(commit, buffer); | |
ed7a42a0 JH |
1133 | return extra; |
1134 | } | |
1135 | ||
fef461ea | 1136 | int for_each_mergetag(each_mergetag_fn fn, struct commit *commit, void *data) |
063da62b CC |
1137 | { |
1138 | struct commit_extra_header *extra, *to_free; | |
fef461ea | 1139 | int res = 0; |
063da62b CC |
1140 | |
1141 | to_free = read_commit_extra_headers(commit, NULL); | |
fef461ea | 1142 | for (extra = to_free; !res && extra; extra = extra->next) { |
063da62b CC |
1143 | if (strcmp(extra->key, "mergetag")) |
1144 | continue; /* not a merge tag */ | |
fef461ea | 1145 | res = fn(commit, extra, data); |
063da62b CC |
1146 | } |
1147 | free_commit_extra_headers(to_free); | |
fef461ea | 1148 | return res; |
063da62b CC |
1149 | } |
1150 | ||
ed7a42a0 JH |
1151 | static inline int standard_header_field(const char *field, size_t len) |
1152 | { | |
b072504c RS |
1153 | return ((len == 4 && !memcmp(field, "tree", 4)) || |
1154 | (len == 6 && !memcmp(field, "parent", 6)) || | |
1155 | (len == 6 && !memcmp(field, "author", 6)) || | |
1156 | (len == 9 && !memcmp(field, "committer", 9)) || | |
1157 | (len == 8 && !memcmp(field, "encoding", 8))); | |
ed7a42a0 JH |
1158 | } |
1159 | ||
c871a1d1 JH |
1160 | static int excluded_header_field(const char *field, size_t len, const char **exclude) |
1161 | { | |
1162 | if (!exclude) | |
1163 | return 0; | |
1164 | ||
1165 | while (*exclude) { | |
1166 | size_t xlen = strlen(*exclude); | |
b072504c | 1167 | if (len == xlen && !memcmp(field, *exclude, xlen)) |
c871a1d1 JH |
1168 | return 1; |
1169 | exclude++; | |
1170 | } | |
1171 | return 0; | |
1172 | } | |
1173 | ||
82a75299 JH |
1174 | static struct commit_extra_header *read_commit_extra_header_lines( |
1175 | const char *buffer, size_t size, | |
1176 | const char **exclude) | |
ed7a42a0 JH |
1177 | { |
1178 | struct commit_extra_header *extra = NULL, **tail = &extra, *it = NULL; | |
1179 | const char *line, *next, *eof, *eob; | |
1180 | struct strbuf buf = STRBUF_INIT; | |
1181 | ||
1182 | for (line = buffer, eob = line + size; | |
1183 | line < eob && *line != '\n'; | |
1184 | line = next) { | |
1185 | next = memchr(line, '\n', eob - line); | |
1186 | next = next ? next + 1 : eob; | |
1187 | if (*line == ' ') { | |
1188 | /* continuation */ | |
1189 | if (it) | |
1190 | strbuf_add(&buf, line + 1, next - (line + 1)); | |
1191 | continue; | |
1192 | } | |
1193 | if (it) | |
1194 | it->value = strbuf_detach(&buf, &it->len); | |
1195 | strbuf_reset(&buf); | |
1196 | it = NULL; | |
1197 | ||
50a01cc4 RS |
1198 | eof = memchr(line, ' ', next - line); |
1199 | if (!eof) | |
ed7a42a0 | 1200 | eof = next; |
b072504c RS |
1201 | else if (standard_header_field(line, eof - line) || |
1202 | excluded_header_field(line, eof - line, exclude)) | |
ed7a42a0 JH |
1203 | continue; |
1204 | ||
1205 | it = xcalloc(1, sizeof(*it)); | |
1206 | it->key = xmemdupz(line, eof-line); | |
1207 | *tail = it; | |
1208 | tail = &it->next; | |
1209 | if (eof + 1 < next) | |
1210 | strbuf_add(&buf, eof + 1, next - (eof + 1)); | |
1211 | } | |
1212 | if (it) | |
1213 | it->value = strbuf_detach(&buf, &it->len); | |
1214 | return extra; | |
5231c633 JH |
1215 | } |
1216 | ||
1217 | void free_commit_extra_headers(struct commit_extra_header *extra) | |
1218 | { | |
1219 | while (extra) { | |
1220 | struct commit_extra_header *next = extra->next; | |
1221 | free(extra->key); | |
1222 | free(extra->value); | |
1223 | free(extra); | |
1224 | extra = next; | |
1225 | } | |
1226 | } | |
1227 | ||
5078f344 PO |
1228 | int commit_tree(const char *msg, size_t msg_len, const struct object_id *tree, |
1229 | struct commit_list *parents, struct object_id *ret, | |
ba3c69a9 | 1230 | const char *author, const char *sign_commit) |
5231c633 JH |
1231 | { |
1232 | struct commit_extra_header *extra = NULL, **tail = &extra; | |
1233 | int result; | |
1234 | ||
1235 | append_merge_tag_headers(parents, &tail); | |
3ffefb54 | 1236 | result = commit_tree_extended(msg, msg_len, tree, parents, ret, |
ba3c69a9 | 1237 | author, sign_commit, extra); |
5231c633 JH |
1238 | free_commit_extra_headers(extra); |
1239 | return result; | |
1240 | } | |
1241 | ||
08a94a14 LT |
1242 | static int find_invalid_utf8(const char *buf, int len) |
1243 | { | |
1244 | int offset = 0; | |
e82bd6cc | 1245 | static const unsigned int max_codepoint[] = { |
1246 | 0x7f, 0x7ff, 0xffff, 0x10ffff | |
1247 | }; | |
08a94a14 LT |
1248 | |
1249 | while (len) { | |
1250 | unsigned char c = *buf++; | |
1251 | int bytes, bad_offset; | |
28110d4b | 1252 | unsigned int codepoint; |
e82bd6cc | 1253 | unsigned int min_val, max_val; |
08a94a14 LT |
1254 | |
1255 | len--; | |
1256 | offset++; | |
1257 | ||
1258 | /* Simple US-ASCII? No worries. */ | |
1259 | if (c < 0x80) | |
1260 | continue; | |
1261 | ||
1262 | bad_offset = offset-1; | |
1263 | ||
1264 | /* | |
1265 | * Count how many more high bits set: that's how | |
1266 | * many more bytes this sequence should have. | |
1267 | */ | |
1268 | bytes = 0; | |
1269 | while (c & 0x40) { | |
1270 | c <<= 1; | |
1271 | bytes++; | |
1272 | } | |
1273 | ||
28110d4b | 1274 | /* |
1275 | * Must be between 1 and 3 more bytes. Longer sequences result in | |
1276 | * codepoints beyond U+10FFFF, which are guaranteed never to exist. | |
1277 | */ | |
1278 | if (bytes < 1 || 3 < bytes) | |
08a94a14 LT |
1279 | return bad_offset; |
1280 | ||
1281 | /* Do we *have* that many bytes? */ | |
1282 | if (len < bytes) | |
1283 | return bad_offset; | |
1284 | ||
e82bd6cc | 1285 | /* |
1286 | * Place the encoded bits at the bottom of the value and compute the | |
1287 | * valid range. | |
1288 | */ | |
28110d4b | 1289 | codepoint = (c & 0x7f) >> bytes; |
e82bd6cc | 1290 | min_val = max_codepoint[bytes-1] + 1; |
1291 | max_val = max_codepoint[bytes]; | |
28110d4b | 1292 | |
08a94a14 LT |
1293 | offset += bytes; |
1294 | len -= bytes; | |
1295 | ||
1296 | /* And verify that they are good continuation bytes */ | |
1297 | do { | |
28110d4b | 1298 | codepoint <<= 6; |
1299 | codepoint |= *buf & 0x3f; | |
08a94a14 LT |
1300 | if ((*buf++ & 0xc0) != 0x80) |
1301 | return bad_offset; | |
1302 | } while (--bytes); | |
1303 | ||
e82bd6cc | 1304 | /* Reject codepoints that are out of range for the sequence length. */ |
1305 | if (codepoint < min_val || codepoint > max_val) | |
28110d4b | 1306 | return bad_offset; |
1307 | /* Surrogates are only for UTF-16 and cannot be encoded in UTF-8. */ | |
1308 | if ((codepoint & 0x1ff800) == 0xd800) | |
1309 | return bad_offset; | |
81050ac6 | 1310 | /* U+xxFFFE and U+xxFFFF are guaranteed non-characters. */ |
dc773a67 | 1311 | if ((codepoint & 0xfffe) == 0xfffe) |
81050ac6 PK |
1312 | return bad_offset; |
1313 | /* So are anything in the range U+FDD0..U+FDEF. */ | |
1314 | if (codepoint >= 0xfdd0 && codepoint <= 0xfdef) | |
28110d4b | 1315 | return bad_offset; |
08a94a14 LT |
1316 | } |
1317 | return -1; | |
1318 | } | |
1319 | ||
1320 | /* | |
1321 | * This verifies that the buffer is in proper utf8 format. | |
1322 | * | |
1323 | * If it isn't, it assumes any non-utf8 characters are Latin1, | |
1324 | * and does the conversion. | |
08a94a14 LT |
1325 | */ |
1326 | static int verify_utf8(struct strbuf *buf) | |
1327 | { | |
1328 | int ok = 1; | |
1329 | long pos = 0; | |
1330 | ||
1331 | for (;;) { | |
1332 | int bad; | |
1333 | unsigned char c; | |
1334 | unsigned char replace[2]; | |
1335 | ||
1336 | bad = find_invalid_utf8(buf->buf + pos, buf->len - pos); | |
1337 | if (bad < 0) | |
1338 | return ok; | |
1339 | pos += bad; | |
1340 | ok = 0; | |
1341 | c = buf->buf[pos]; | |
1342 | strbuf_remove(buf, pos, 1); | |
1343 | ||
1344 | /* We know 'c' must be in the range 128-255 */ | |
1345 | replace[0] = 0xc0 + (c >> 6); | |
1346 | replace[1] = 0x80 + (c & 0x3f); | |
1347 | strbuf_insert(buf, pos, replace, 2); | |
1348 | pos += 2; | |
1349 | } | |
1350 | } | |
1351 | ||
40d52ff7 | 1352 | static const char commit_utf8_warn[] = |
4fa4b315 VA |
1353 | N_("Warning: commit message did not conform to UTF-8.\n" |
1354 | "You may want to amend it after fixing the message, or set the config\n" | |
1355 | "variable i18n.commitencoding to the encoding your project uses.\n"); | |
40d52ff7 | 1356 | |
3ffefb54 | 1357 | int commit_tree_extended(const char *msg, size_t msg_len, |
5078f344 PO |
1358 | const struct object_id *tree, |
1359 | struct commit_list *parents, struct object_id *ret, | |
ba3c69a9 JH |
1360 | const char *author, const char *sign_commit, |
1361 | struct commit_extra_header *extra) | |
40d52ff7 JK |
1362 | { |
1363 | int result; | |
1364 | int encoding_is_utf8; | |
1365 | struct strbuf buffer; | |
1366 | ||
e816caa0 | 1367 | assert_oid_type(tree, OBJ_TREE); |
40d52ff7 | 1368 | |
3ffefb54 | 1369 | if (memchr(msg, '\0', msg_len)) |
37576c14 NTND |
1370 | return error("a NUL byte in commit log message not allowed."); |
1371 | ||
40d52ff7 JK |
1372 | /* Not having i18n.commitencoding is the same as having utf-8 */ |
1373 | encoding_is_utf8 = is_encoding_utf8(git_commit_encoding); | |
1374 | ||
1375 | strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */ | |
5078f344 | 1376 | strbuf_addf(&buffer, "tree %s\n", oid_to_hex(tree)); |
40d52ff7 JK |
1377 | |
1378 | /* | |
1379 | * NOTE! This ordering means that the same exact tree merged with a | |
1380 | * different order of parents will be a _different_ changeset even | |
1381 | * if everything else stays the same. | |
1382 | */ | |
1383 | while (parents) { | |
e510ab89 | 1384 | struct commit *parent = pop_commit(&parents); |
40d52ff7 | 1385 | strbuf_addf(&buffer, "parent %s\n", |
f2fd0760 | 1386 | oid_to_hex(&parent->object.oid)); |
40d52ff7 JK |
1387 | } |
1388 | ||
1389 | /* Person/date information */ | |
1390 | if (!author) | |
f9bc573f | 1391 | author = git_author_info(IDENT_STRICT); |
40d52ff7 | 1392 | strbuf_addf(&buffer, "author %s\n", author); |
f9bc573f | 1393 | strbuf_addf(&buffer, "committer %s\n", git_committer_info(IDENT_STRICT)); |
40d52ff7 JK |
1394 | if (!encoding_is_utf8) |
1395 | strbuf_addf(&buffer, "encoding %s\n", git_commit_encoding); | |
5231c633 JH |
1396 | |
1397 | while (extra) { | |
1398 | add_extra_header(&buffer, extra); | |
1399 | extra = extra->next; | |
1400 | } | |
40d52ff7 JK |
1401 | strbuf_addch(&buffer, '\n'); |
1402 | ||
1403 | /* And add the comment */ | |
3ffefb54 | 1404 | strbuf_add(&buffer, msg, msg_len); |
40d52ff7 JK |
1405 | |
1406 | /* And check the encoding */ | |
08a94a14 | 1407 | if (encoding_is_utf8 && !verify_utf8(&buffer)) |
4fa4b315 | 1408 | fprintf(stderr, _(commit_utf8_warn)); |
40d52ff7 | 1409 | |
e505146d RS |
1410 | if (sign_commit && do_sign_commit(&buffer, sign_commit)) { |
1411 | result = -1; | |
1412 | goto out; | |
1413 | } | |
ba3c69a9 | 1414 | |
a09c985e | 1415 | result = write_object_file(buffer.buf, buffer.len, commit_type, ret); |
e505146d | 1416 | out: |
40d52ff7 JK |
1417 | strbuf_release(&buffer); |
1418 | return result; | |
1419 | } | |
ae8e4c9c | 1420 | |
e2e5ac23 NTND |
1421 | define_commit_slab(merge_desc_slab, struct merge_remote_desc *); |
1422 | static struct merge_desc_slab merge_desc_slab = COMMIT_SLAB_INIT(1, merge_desc_slab); | |
1423 | ||
1424 | struct merge_remote_desc *merge_remote_util(struct commit *commit) | |
1425 | { | |
1426 | return *merge_desc_slab_at(&merge_desc_slab, commit); | |
1427 | } | |
1428 | ||
beb518c9 RS |
1429 | void set_merge_remote_desc(struct commit *commit, |
1430 | const char *name, struct object *obj) | |
1431 | { | |
1432 | struct merge_remote_desc *desc; | |
5447a76a | 1433 | FLEX_ALLOC_STR(desc, name, name); |
beb518c9 | 1434 | desc->obj = obj; |
e2e5ac23 | 1435 | *merge_desc_slab_at(&merge_desc_slab, commit) = desc; |
beb518c9 RS |
1436 | } |
1437 | ||
ae8e4c9c JH |
1438 | struct commit *get_merge_parent(const char *name) |
1439 | { | |
1440 | struct object *obj; | |
1441 | struct commit *commit; | |
7683e2e6 | 1442 | struct object_id oid; |
e82caf38 | 1443 | if (get_oid(name, &oid)) |
ae8e4c9c | 1444 | return NULL; |
109cd76d | 1445 | obj = parse_object(the_repository, &oid); |
ae8e4c9c | 1446 | commit = (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT); |
e2e5ac23 | 1447 | if (commit && !merge_remote_util(commit)) |
beb518c9 | 1448 | set_merge_remote_desc(commit, name, obj); |
ae8e4c9c JH |
1449 | return commit; |
1450 | } | |
89b5f1d9 RS |
1451 | |
1452 | /* | |
1453 | * Append a commit to the end of the commit_list. | |
1454 | * | |
1455 | * next starts by pointing to the variable that holds the head of an | |
1456 | * empty commit_list, and is updated to point to the "next" field of | |
1457 | * the last item on the list as new commits are appended. | |
1458 | * | |
1459 | * Usage example: | |
1460 | * | |
1461 | * struct commit_list *list; | |
1462 | * struct commit_list **next = &list; | |
1463 | * | |
1464 | * next = commit_list_append(c1, next); | |
1465 | * next = commit_list_append(c2, next); | |
1466 | * assert(commit_list_count(list) == 2); | |
1467 | * return list; | |
1468 | */ | |
1469 | struct commit_list **commit_list_append(struct commit *commit, | |
1470 | struct commit_list **next) | |
1471 | { | |
258c03eb BW |
1472 | struct commit_list *new_commit = xmalloc(sizeof(struct commit_list)); |
1473 | new_commit->item = commit; | |
1474 | *next = new_commit; | |
1475 | new_commit->next = NULL; | |
1476 | return &new_commit->next; | |
89b5f1d9 | 1477 | } |
efc7df45 | 1478 | |
fe6eb7f2 JK |
1479 | const char *find_commit_header(const char *msg, const char *key, size_t *out_len) |
1480 | { | |
1481 | int key_len = strlen(key); | |
1482 | const char *line = msg; | |
1483 | ||
1484 | while (line) { | |
1485 | const char *eol = strchrnul(line, '\n'); | |
1486 | ||
1487 | if (line == eol) | |
1488 | return NULL; | |
1489 | ||
1490 | if (eol - line > key_len && | |
1491 | !strncmp(line, key, key_len) && | |
1492 | line[key_len] == ' ') { | |
1493 | *out_len = eol - line - key_len - 1; | |
1494 | return line + key_len + 1; | |
1495 | } | |
1496 | line = *eol ? eol + 1 : NULL; | |
1497 | } | |
1498 | return NULL; | |
1499 | } | |
0ed8a4e1 | 1500 | |
8c384589 | 1501 | /* |
710714aa | 1502 | * Inspect the given string and determine the true "end" of the log message, in |
8c384589 | 1503 | * order to find where to put a new Signed-off-by: line. Ignored are |
d76650b8 BM |
1504 | * trailing comment lines and blank lines. To support "git commit -s |
1505 | * --amend" on an existing commit, we also ignore "Conflicts:". To | |
1506 | * support "git commit -v", we truncate at cut lines. | |
8c384589 CC |
1507 | * |
1508 | * Returns the number of bytes from the tail to ignore, to be fed as | |
1509 | * the second parameter to append_signoff(). | |
1510 | */ | |
66e83d9b | 1511 | size_t ignore_non_trailer(const char *buf, size_t len) |
8c384589 | 1512 | { |
66e83d9b JK |
1513 | size_t boc = 0; |
1514 | size_t bol = 0; | |
8c384589 | 1515 | int in_old_conflicts_block = 0; |
d76650b8 | 1516 | size_t cutoff = wt_status_locate_end(buf, len); |
8c384589 | 1517 | |
d76650b8 | 1518 | while (bol < cutoff) { |
710714aa | 1519 | const char *next_line = memchr(buf + bol, '\n', len - bol); |
8c384589 | 1520 | |
710714aa JT |
1521 | if (!next_line) |
1522 | next_line = buf + len; | |
8c384589 CC |
1523 | else |
1524 | next_line++; | |
1525 | ||
710714aa | 1526 | if (buf[bol] == comment_line_char || buf[bol] == '\n') { |
8c384589 CC |
1527 | /* is this the first of the run of comments? */ |
1528 | if (!boc) | |
1529 | boc = bol; | |
1530 | /* otherwise, it is just continuing */ | |
710714aa | 1531 | } else if (starts_with(buf + bol, "Conflicts:\n")) { |
8c384589 CC |
1532 | in_old_conflicts_block = 1; |
1533 | if (!boc) | |
1534 | boc = bol; | |
710714aa | 1535 | } else if (in_old_conflicts_block && buf[bol] == '\t') { |
8c384589 CC |
1536 | ; /* a pathname in the conflicts block */ |
1537 | } else if (boc) { | |
1538 | /* the previous was not trailing comment */ | |
1539 | boc = 0; | |
1540 | in_old_conflicts_block = 0; | |
1541 | } | |
710714aa | 1542 | bol = next_line - buf; |
8c384589 | 1543 | } |
d76650b8 | 1544 | return boc ? len - boc : len - cutoff; |
8c384589 | 1545 | } |