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Commit | Line | Data |
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26ae337b RR |
1 | #include "cache.h" |
2 | #include "sequencer.h" | |
26ae337b | 3 | #include "dir.h" |
043a4492 RR |
4 | #include "object.h" |
5 | #include "commit.h" | |
6 | #include "tag.h" | |
7 | #include "run-command.h" | |
8 | #include "exec_cmd.h" | |
9 | #include "utf8.h" | |
10 | #include "cache-tree.h" | |
11 | #include "diff.h" | |
12 | #include "revision.h" | |
13 | #include "rerere.h" | |
14 | #include "merge-recursive.h" | |
15 | #include "refs.h" | |
b27cfb0d | 16 | #include "argv-array.h" |
043a4492 RR |
17 | |
18 | #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION" | |
26ae337b | 19 | |
5ed75e2a | 20 | const char sign_off_header[] = "Signed-off-by: "; |
cd650a4e | 21 | static const char cherry_picked_prefix[] = "(cherry picked from commit "; |
5ed75e2a | 22 | |
b971e04f BC |
23 | static int is_rfc2822_line(const char *buf, int len) |
24 | { | |
25 | int i; | |
26 | ||
27 | for (i = 0; i < len; i++) { | |
28 | int ch = buf[i]; | |
29 | if (ch == ':') | |
30 | return 1; | |
31 | if (!isalnum(ch) && ch != '-') | |
32 | break; | |
33 | } | |
34 | ||
35 | return 0; | |
36 | } | |
37 | ||
38 | static int is_cherry_picked_from_line(const char *buf, int len) | |
39 | { | |
40 | /* | |
41 | * We only care that it looks roughly like (cherry picked from ...) | |
42 | */ | |
43 | return len > strlen(cherry_picked_prefix) + 1 && | |
59556548 | 44 | starts_with(buf, cherry_picked_prefix) && buf[len - 1] == ')'; |
b971e04f BC |
45 | } |
46 | ||
bab4d109 BC |
47 | /* |
48 | * Returns 0 for non-conforming footer | |
49 | * Returns 1 for conforming footer | |
50 | * Returns 2 when sob exists within conforming footer | |
51 | * Returns 3 when sob exists within conforming footer as last entry | |
52 | */ | |
53 | static int has_conforming_footer(struct strbuf *sb, struct strbuf *sob, | |
54 | int ignore_footer) | |
b971e04f BC |
55 | { |
56 | char prev; | |
57 | int i, k; | |
58 | int len = sb->len - ignore_footer; | |
59 | const char *buf = sb->buf; | |
bab4d109 | 60 | int found_sob = 0; |
b971e04f BC |
61 | |
62 | /* footer must end with newline */ | |
63 | if (!len || buf[len - 1] != '\n') | |
64 | return 0; | |
65 | ||
66 | prev = '\0'; | |
67 | for (i = len - 1; i > 0; i--) { | |
68 | char ch = buf[i]; | |
69 | if (prev == '\n' && ch == '\n') /* paragraph break */ | |
70 | break; | |
71 | prev = ch; | |
72 | } | |
73 | ||
74 | /* require at least one blank line */ | |
75 | if (prev != '\n' || buf[i] != '\n') | |
76 | return 0; | |
77 | ||
78 | /* advance to start of last paragraph */ | |
79 | while (i < len - 1 && buf[i] == '\n') | |
80 | i++; | |
81 | ||
82 | for (; i < len; i = k) { | |
bab4d109 BC |
83 | int found_rfc2822; |
84 | ||
b971e04f BC |
85 | for (k = i; k < len && buf[k] != '\n'; k++) |
86 | ; /* do nothing */ | |
87 | k++; | |
88 | ||
bab4d109 BC |
89 | found_rfc2822 = is_rfc2822_line(buf + i, k - i - 1); |
90 | if (found_rfc2822 && sob && | |
91 | !strncmp(buf + i, sob->buf, sob->len)) | |
92 | found_sob = k; | |
93 | ||
94 | if (!(found_rfc2822 || | |
95 | is_cherry_picked_from_line(buf + i, k - i - 1))) | |
b971e04f BC |
96 | return 0; |
97 | } | |
bab4d109 BC |
98 | if (found_sob == i) |
99 | return 3; | |
100 | if (found_sob) | |
101 | return 2; | |
b971e04f BC |
102 | return 1; |
103 | } | |
5ed75e2a | 104 | |
250f2492 | 105 | static void remove_sequencer_state(void) |
26ae337b RR |
106 | { |
107 | struct strbuf seq_dir = STRBUF_INIT; | |
26ae337b RR |
108 | |
109 | strbuf_addf(&seq_dir, "%s", git_path(SEQ_DIR)); | |
d596118d | 110 | remove_dir_recursively(&seq_dir, 0); |
26ae337b | 111 | strbuf_release(&seq_dir); |
26ae337b | 112 | } |
043a4492 RR |
113 | |
114 | static const char *action_name(const struct replay_opts *opts) | |
115 | { | |
116 | return opts->action == REPLAY_REVERT ? "revert" : "cherry-pick"; | |
117 | } | |
118 | ||
043a4492 RR |
119 | struct commit_message { |
120 | char *parent_label; | |
121 | const char *label; | |
122 | const char *subject; | |
043a4492 RR |
123 | const char *message; |
124 | }; | |
125 | ||
126 | static int get_message(struct commit *commit, struct commit_message *out) | |
127 | { | |
043a4492 RR |
128 | const char *abbrev, *subject; |
129 | int abbrev_len, subject_len; | |
130 | char *q; | |
131 | ||
043a4492 RR |
132 | if (!git_commit_encoding) |
133 | git_commit_encoding = "UTF-8"; | |
134 | ||
d74a4e57 | 135 | out->message = logmsg_reencode(commit, NULL, git_commit_encoding); |
043a4492 RR |
136 | abbrev = find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV); |
137 | abbrev_len = strlen(abbrev); | |
138 | ||
139 | subject_len = find_commit_subject(out->message, &subject); | |
140 | ||
141 | out->parent_label = xmalloc(strlen("parent of ") + abbrev_len + | |
142 | strlen("... ") + subject_len + 1); | |
143 | q = out->parent_label; | |
144 | q = mempcpy(q, "parent of ", strlen("parent of ")); | |
145 | out->label = q; | |
146 | q = mempcpy(q, abbrev, abbrev_len); | |
147 | q = mempcpy(q, "... ", strlen("... ")); | |
148 | out->subject = q; | |
149 | q = mempcpy(q, subject, subject_len); | |
150 | *q = '\0'; | |
151 | return 0; | |
152 | } | |
153 | ||
d74a4e57 | 154 | static void free_message(struct commit *commit, struct commit_message *msg) |
043a4492 RR |
155 | { |
156 | free(msg->parent_label); | |
b66103c3 | 157 | unuse_commit_buffer(commit, msg->message); |
043a4492 RR |
158 | } |
159 | ||
160 | static void write_cherry_pick_head(struct commit *commit, const char *pseudoref) | |
161 | { | |
162 | const char *filename; | |
163 | int fd; | |
164 | struct strbuf buf = STRBUF_INIT; | |
165 | ||
166 | strbuf_addf(&buf, "%s\n", sha1_to_hex(commit->object.sha1)); | |
167 | ||
168 | filename = git_path("%s", pseudoref); | |
169 | fd = open(filename, O_WRONLY | O_CREAT, 0666); | |
170 | if (fd < 0) | |
171 | die_errno(_("Could not open '%s' for writing"), filename); | |
172 | if (write_in_full(fd, buf.buf, buf.len) != buf.len || close(fd)) | |
173 | die_errno(_("Could not write to '%s'"), filename); | |
174 | strbuf_release(&buf); | |
175 | } | |
176 | ||
ed727b19 | 177 | static void print_advice(int show_hint, struct replay_opts *opts) |
043a4492 RR |
178 | { |
179 | char *msg = getenv("GIT_CHERRY_PICK_HELP"); | |
180 | ||
181 | if (msg) { | |
182 | fprintf(stderr, "%s\n", msg); | |
183 | /* | |
41ccfdd9 | 184 | * A conflict has occurred but the porcelain |
043a4492 RR |
185 | * (typically rebase --interactive) wants to take care |
186 | * of the commit itself so remove CHERRY_PICK_HEAD | |
187 | */ | |
188 | unlink(git_path("CHERRY_PICK_HEAD")); | |
189 | return; | |
190 | } | |
191 | ||
ed727b19 PH |
192 | if (show_hint) { |
193 | if (opts->no_commit) | |
194 | advise(_("after resolving the conflicts, mark the corrected paths\n" | |
195 | "with 'git add <paths>' or 'git rm <paths>'")); | |
196 | else | |
197 | advise(_("after resolving the conflicts, mark the corrected paths\n" | |
198 | "with 'git add <paths>' or 'git rm <paths>'\n" | |
199 | "and commit the result with 'git commit'")); | |
200 | } | |
043a4492 RR |
201 | } |
202 | ||
203 | static void write_message(struct strbuf *msgbuf, const char *filename) | |
204 | { | |
205 | static struct lock_file msg_file; | |
206 | ||
207 | int msg_fd = hold_lock_file_for_update(&msg_file, filename, | |
208 | LOCK_DIE_ON_ERROR); | |
209 | if (write_in_full(msg_fd, msgbuf->buf, msgbuf->len) < 0) | |
210 | die_errno(_("Could not write to %s"), filename); | |
211 | strbuf_release(msgbuf); | |
212 | if (commit_lock_file(&msg_file) < 0) | |
213 | die(_("Error wrapping up %s"), filename); | |
214 | } | |
215 | ||
216 | static struct tree *empty_tree(void) | |
217 | { | |
cba595bd | 218 | return lookup_tree(EMPTY_TREE_SHA1_BIN); |
043a4492 RR |
219 | } |
220 | ||
221 | static int error_dirty_index(struct replay_opts *opts) | |
222 | { | |
223 | if (read_cache_unmerged()) | |
224 | return error_resolve_conflict(action_name(opts)); | |
225 | ||
226 | /* Different translation strings for cherry-pick and revert */ | |
227 | if (opts->action == REPLAY_PICK) | |
228 | error(_("Your local changes would be overwritten by cherry-pick.")); | |
229 | else | |
230 | error(_("Your local changes would be overwritten by revert.")); | |
231 | ||
232 | if (advice_commit_before_merge) | |
233 | advise(_("Commit your changes or stash them to proceed.")); | |
234 | return -1; | |
235 | } | |
236 | ||
334ae397 | 237 | static int fast_forward_to(const unsigned char *to, const unsigned char *from, |
eb4be1cb | 238 | int unborn, struct replay_opts *opts) |
043a4492 RR |
239 | { |
240 | struct ref_lock *ref_lock; | |
eb4be1cb RR |
241 | struct strbuf sb = STRBUF_INIT; |
242 | int ret; | |
043a4492 RR |
243 | |
244 | read_cache(); | |
db699a8a | 245 | if (checkout_fast_forward(from, to, 1)) |
43dee070 | 246 | exit(128); /* the callee should have complained already */ |
9bbb0fa1 BK |
247 | ref_lock = lock_any_ref_for_update("HEAD", unborn ? null_sha1 : from, |
248 | 0, NULL); | |
651ab9f5 RS |
249 | if (!ref_lock) |
250 | return error(_("Failed to lock HEAD during fast_forward_to")); | |
251 | ||
eb4be1cb RR |
252 | strbuf_addf(&sb, "%s: fast-forward", action_name(opts)); |
253 | ret = write_ref_sha1(ref_lock, to, sb.buf); | |
651ab9f5 | 254 | |
eb4be1cb RR |
255 | strbuf_release(&sb); |
256 | return ret; | |
043a4492 RR |
257 | } |
258 | ||
259 | static int do_recursive_merge(struct commit *base, struct commit *next, | |
260 | const char *base_label, const char *next_label, | |
261 | unsigned char *head, struct strbuf *msgbuf, | |
262 | struct replay_opts *opts) | |
263 | { | |
264 | struct merge_options o; | |
265 | struct tree *result, *next_tree, *base_tree, *head_tree; | |
03b86647 | 266 | int clean; |
043a4492 RR |
267 | const char **xopt; |
268 | static struct lock_file index_lock; | |
269 | ||
03b86647 | 270 | hold_locked_index(&index_lock, 1); |
043a4492 RR |
271 | |
272 | read_cache(); | |
273 | ||
274 | init_merge_options(&o); | |
275 | o.ancestor = base ? base_label : "(empty tree)"; | |
276 | o.branch1 = "HEAD"; | |
277 | o.branch2 = next ? next_label : "(empty tree)"; | |
278 | ||
279 | head_tree = parse_tree_indirect(head); | |
280 | next_tree = next ? next->tree : empty_tree(); | |
281 | base_tree = base ? base->tree : empty_tree(); | |
282 | ||
283 | for (xopt = opts->xopts; xopt != opts->xopts + opts->xopts_nr; xopt++) | |
284 | parse_merge_opt(&o, *xopt); | |
285 | ||
286 | clean = merge_trees(&o, | |
287 | head_tree, | |
288 | next_tree, base_tree, &result); | |
289 | ||
290 | if (active_cache_changed && | |
03b86647 | 291 | write_locked_index(&the_index, &index_lock, COMMIT_LOCK)) |
043a4492 RR |
292 | /* TRANSLATORS: %s will be "revert" or "cherry-pick" */ |
293 | die(_("%s: Unable to write new index file"), action_name(opts)); | |
294 | rollback_lock_file(&index_lock); | |
295 | ||
5ed75e2a | 296 | if (opts->signoff) |
bab4d109 | 297 | append_signoff(msgbuf, 0, 0); |
5ed75e2a | 298 | |
043a4492 RR |
299 | if (!clean) { |
300 | int i; | |
51120683 | 301 | strbuf_addstr(msgbuf, "\nConflicts:\n"); |
043a4492 | 302 | for (i = 0; i < active_nr;) { |
9c5e6c80 | 303 | const struct cache_entry *ce = active_cache[i++]; |
043a4492 RR |
304 | if (ce_stage(ce)) { |
305 | strbuf_addch(msgbuf, '\t'); | |
306 | strbuf_addstr(msgbuf, ce->name); | |
307 | strbuf_addch(msgbuf, '\n'); | |
308 | while (i < active_nr && !strcmp(ce->name, | |
309 | active_cache[i]->name)) | |
310 | i++; | |
311 | } | |
312 | } | |
313 | } | |
314 | ||
315 | return !clean; | |
316 | } | |
317 | ||
b27cfb0d NH |
318 | static int is_index_unchanged(void) |
319 | { | |
320 | unsigned char head_sha1[20]; | |
321 | struct commit *head_commit; | |
322 | ||
323 | if (!resolve_ref_unsafe("HEAD", head_sha1, 1, NULL)) | |
324 | return error(_("Could not resolve HEAD commit\n")); | |
325 | ||
326 | head_commit = lookup_commit(head_sha1); | |
4b580061 NH |
327 | |
328 | /* | |
329 | * If head_commit is NULL, check_commit, called from | |
330 | * lookup_commit, would have indicated that head_commit is not | |
331 | * a commit object already. parse_commit() will return failure | |
332 | * without further complaints in such a case. Otherwise, if | |
333 | * the commit is invalid, parse_commit() will complain. So | |
334 | * there is nothing for us to say here. Just return failure. | |
335 | */ | |
336 | if (parse_commit(head_commit)) | |
337 | return -1; | |
b27cfb0d NH |
338 | |
339 | if (!active_cache_tree) | |
340 | active_cache_tree = cache_tree(); | |
341 | ||
342 | if (!cache_tree_fully_valid(active_cache_tree)) | |
d0cfc3e8 | 343 | if (cache_tree_update(&the_index, 0)) |
b27cfb0d NH |
344 | return error(_("Unable to update cache tree\n")); |
345 | ||
346 | return !hashcmp(active_cache_tree->sha1, head_commit->tree->object.sha1); | |
347 | } | |
348 | ||
043a4492 RR |
349 | /* |
350 | * If we are cherry-pick, and if the merge did not result in | |
351 | * hand-editing, we will hit this commit and inherit the original | |
352 | * author date and name. | |
353 | * If we are revert, or if our cherry-pick results in a hand merge, | |
354 | * we had better say that the current user is responsible for that. | |
355 | */ | |
ac2b0e8f JH |
356 | static int run_git_commit(const char *defmsg, struct replay_opts *opts, |
357 | int allow_empty) | |
043a4492 | 358 | { |
b27cfb0d NH |
359 | struct argv_array array; |
360 | int rc; | |
361 | ||
362 | argv_array_init(&array); | |
363 | argv_array_push(&array, "commit"); | |
364 | argv_array_push(&array, "-n"); | |
043a4492 | 365 | |
3bdd5522 JK |
366 | if (opts->gpg_sign) |
367 | argv_array_pushf(&array, "-S%s", opts->gpg_sign); | |
043a4492 | 368 | if (opts->signoff) |
b27cfb0d | 369 | argv_array_push(&array, "-s"); |
043a4492 | 370 | if (!opts->edit) { |
b27cfb0d NH |
371 | argv_array_push(&array, "-F"); |
372 | argv_array_push(&array, defmsg); | |
043a4492 | 373 | } |
b27cfb0d | 374 | |
ac2b0e8f | 375 | if (allow_empty) |
b27cfb0d | 376 | argv_array_push(&array, "--allow-empty"); |
df478b74 | 377 | |
4bee9584 CW |
378 | if (opts->allow_empty_message) |
379 | argv_array_push(&array, "--allow-empty-message"); | |
380 | ||
b27cfb0d NH |
381 | rc = run_command_v_opt(array.argv, RUN_GIT_CMD); |
382 | argv_array_clear(&array); | |
383 | return rc; | |
384 | } | |
385 | ||
386 | static int is_original_commit_empty(struct commit *commit) | |
387 | { | |
388 | const unsigned char *ptree_sha1; | |
389 | ||
390 | if (parse_commit(commit)) | |
391 | return error(_("Could not parse commit %s\n"), | |
392 | sha1_to_hex(commit->object.sha1)); | |
393 | if (commit->parents) { | |
394 | struct commit *parent = commit->parents->item; | |
395 | if (parse_commit(parent)) | |
396 | return error(_("Could not parse parent commit %s\n"), | |
397 | sha1_to_hex(parent->object.sha1)); | |
398 | ptree_sha1 = parent->tree->object.sha1; | |
399 | } else { | |
400 | ptree_sha1 = EMPTY_TREE_SHA1_BIN; /* commit is root */ | |
043a4492 | 401 | } |
043a4492 | 402 | |
b27cfb0d | 403 | return !hashcmp(ptree_sha1, commit->tree->object.sha1); |
043a4492 RR |
404 | } |
405 | ||
ac2b0e8f JH |
406 | /* |
407 | * Do we run "git commit" with "--allow-empty"? | |
408 | */ | |
409 | static int allow_empty(struct replay_opts *opts, struct commit *commit) | |
410 | { | |
411 | int index_unchanged, empty_commit; | |
412 | ||
413 | /* | |
414 | * Three cases: | |
415 | * | |
416 | * (1) we do not allow empty at all and error out. | |
417 | * | |
418 | * (2) we allow ones that were initially empty, but | |
419 | * forbid the ones that become empty; | |
420 | * | |
421 | * (3) we allow both. | |
422 | */ | |
423 | if (!opts->allow_empty) | |
424 | return 0; /* let "git commit" barf as necessary */ | |
425 | ||
426 | index_unchanged = is_index_unchanged(); | |
427 | if (index_unchanged < 0) | |
428 | return index_unchanged; | |
429 | if (!index_unchanged) | |
430 | return 0; /* we do not have to say --allow-empty */ | |
431 | ||
432 | if (opts->keep_redundant_commits) | |
433 | return 1; | |
434 | ||
435 | empty_commit = is_original_commit_empty(commit); | |
436 | if (empty_commit < 0) | |
437 | return empty_commit; | |
438 | if (!empty_commit) | |
439 | return 0; | |
440 | else | |
441 | return 1; | |
442 | } | |
443 | ||
043a4492 RR |
444 | static int do_pick_commit(struct commit *commit, struct replay_opts *opts) |
445 | { | |
446 | unsigned char head[20]; | |
447 | struct commit *base, *next, *parent; | |
448 | const char *base_label, *next_label; | |
d74a4e57 | 449 | struct commit_message msg = { NULL, NULL, NULL, NULL }; |
043a4492 RR |
450 | char *defmsg = NULL; |
451 | struct strbuf msgbuf = STRBUF_INIT; | |
c8d1351d | 452 | int res, unborn = 0, allow; |
043a4492 RR |
453 | |
454 | if (opts->no_commit) { | |
455 | /* | |
456 | * We do not intend to commit immediately. We just want to | |
457 | * merge the differences in, so let's compute the tree | |
458 | * that represents the "current" state for merge-recursive | |
459 | * to work on. | |
460 | */ | |
461 | if (write_cache_as_tree(head, 0, NULL)) | |
462 | die (_("Your index file is unmerged.")); | |
463 | } else { | |
334ae397 MZ |
464 | unborn = get_sha1("HEAD", head); |
465 | if (unborn) | |
466 | hashcpy(head, EMPTY_TREE_SHA1_BIN); | |
467 | if (index_differs_from(unborn ? EMPTY_TREE_SHA1_HEX : "HEAD", 0)) | |
043a4492 RR |
468 | return error_dirty_index(opts); |
469 | } | |
470 | discard_cache(); | |
471 | ||
472 | if (!commit->parents) { | |
473 | parent = NULL; | |
474 | } | |
475 | else if (commit->parents->next) { | |
476 | /* Reverting or cherry-picking a merge commit */ | |
477 | int cnt; | |
478 | struct commit_list *p; | |
479 | ||
480 | if (!opts->mainline) | |
481 | return error(_("Commit %s is a merge but no -m option was given."), | |
482 | sha1_to_hex(commit->object.sha1)); | |
483 | ||
484 | for (cnt = 1, p = commit->parents; | |
485 | cnt != opts->mainline && p; | |
486 | cnt++) | |
487 | p = p->next; | |
488 | if (cnt != opts->mainline || !p) | |
489 | return error(_("Commit %s does not have parent %d"), | |
490 | sha1_to_hex(commit->object.sha1), opts->mainline); | |
491 | parent = p->item; | |
492 | } else if (0 < opts->mainline) | |
493 | return error(_("Mainline was specified but commit %s is not a merge."), | |
494 | sha1_to_hex(commit->object.sha1)); | |
495 | else | |
496 | parent = commit->parents->item; | |
497 | ||
334ae397 MZ |
498 | if (opts->allow_ff && |
499 | ((parent && !hashcmp(parent->object.sha1, head)) || | |
500 | (!parent && unborn))) | |
eb4be1cb | 501 | return fast_forward_to(commit->object.sha1, head, unborn, opts); |
043a4492 RR |
502 | |
503 | if (parent && parse_commit(parent) < 0) | |
504 | /* TRANSLATORS: The first %s will be "revert" or | |
505 | "cherry-pick", the second %s a SHA1 */ | |
506 | return error(_("%s: cannot parse parent commit %s"), | |
507 | action_name(opts), sha1_to_hex(parent->object.sha1)); | |
508 | ||
509 | if (get_message(commit, &msg) != 0) | |
510 | return error(_("Cannot get commit message for %s"), | |
511 | sha1_to_hex(commit->object.sha1)); | |
512 | ||
513 | /* | |
514 | * "commit" is an existing commit. We would want to apply | |
515 | * the difference it introduces since its first parent "prev" | |
516 | * on top of the current HEAD if we are cherry-pick. Or the | |
517 | * reverse of it if we are revert. | |
518 | */ | |
519 | ||
520 | defmsg = git_pathdup("MERGE_MSG"); | |
521 | ||
522 | if (opts->action == REPLAY_REVERT) { | |
523 | base = commit; | |
524 | base_label = msg.label; | |
525 | next = parent; | |
526 | next_label = msg.parent_label; | |
527 | strbuf_addstr(&msgbuf, "Revert \""); | |
528 | strbuf_addstr(&msgbuf, msg.subject); | |
529 | strbuf_addstr(&msgbuf, "\"\n\nThis reverts commit "); | |
530 | strbuf_addstr(&msgbuf, sha1_to_hex(commit->object.sha1)); | |
531 | ||
532 | if (commit->parents && commit->parents->next) { | |
533 | strbuf_addstr(&msgbuf, ", reversing\nchanges made to "); | |
534 | strbuf_addstr(&msgbuf, sha1_to_hex(parent->object.sha1)); | |
535 | } | |
536 | strbuf_addstr(&msgbuf, ".\n"); | |
537 | } else { | |
538 | const char *p; | |
539 | ||
540 | base = parent; | |
541 | base_label = msg.parent_label; | |
542 | next = commit; | |
543 | next_label = msg.label; | |
544 | ||
545 | /* | |
546 | * Append the commit log message to msgbuf; it starts | |
547 | * after the tree, parent, author, committer | |
548 | * information followed by "\n\n". | |
549 | */ | |
550 | p = strstr(msg.message, "\n\n"); | |
551 | if (p) { | |
552 | p += 2; | |
553 | strbuf_addstr(&msgbuf, p); | |
554 | } | |
555 | ||
556 | if (opts->record_origin) { | |
bab4d109 | 557 | if (!has_conforming_footer(&msgbuf, NULL, 0)) |
b971e04f | 558 | strbuf_addch(&msgbuf, '\n'); |
cd650a4e | 559 | strbuf_addstr(&msgbuf, cherry_picked_prefix); |
043a4492 RR |
560 | strbuf_addstr(&msgbuf, sha1_to_hex(commit->object.sha1)); |
561 | strbuf_addstr(&msgbuf, ")\n"); | |
562 | } | |
563 | } | |
564 | ||
565 | if (!opts->strategy || !strcmp(opts->strategy, "recursive") || opts->action == REPLAY_REVERT) { | |
566 | res = do_recursive_merge(base, next, base_label, next_label, | |
567 | head, &msgbuf, opts); | |
568 | write_message(&msgbuf, defmsg); | |
569 | } else { | |
570 | struct commit_list *common = NULL; | |
571 | struct commit_list *remotes = NULL; | |
572 | ||
573 | write_message(&msgbuf, defmsg); | |
574 | ||
575 | commit_list_insert(base, &common); | |
576 | commit_list_insert(next, &remotes); | |
577 | res = try_merge_command(opts->strategy, opts->xopts_nr, opts->xopts, | |
578 | common, sha1_to_hex(head), remotes); | |
579 | free_commit_list(common); | |
580 | free_commit_list(remotes); | |
581 | } | |
582 | ||
583 | /* | |
584 | * If the merge was clean or if it failed due to conflict, we write | |
585 | * CHERRY_PICK_HEAD for the subsequent invocation of commit to use. | |
586 | * However, if the merge did not even start, then we don't want to | |
587 | * write it at all. | |
588 | */ | |
589 | if (opts->action == REPLAY_PICK && !opts->no_commit && (res == 0 || res == 1)) | |
590 | write_cherry_pick_head(commit, "CHERRY_PICK_HEAD"); | |
591 | if (opts->action == REPLAY_REVERT && ((opts->no_commit && res == 0) || res == 1)) | |
592 | write_cherry_pick_head(commit, "REVERT_HEAD"); | |
593 | ||
594 | if (res) { | |
595 | error(opts->action == REPLAY_REVERT | |
596 | ? _("could not revert %s... %s") | |
597 | : _("could not apply %s... %s"), | |
598 | find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV), | |
599 | msg.subject); | |
ed727b19 | 600 | print_advice(res == 1, opts); |
043a4492 | 601 | rerere(opts->allow_rerere_auto); |
c8d1351d | 602 | goto leave; |
043a4492 RR |
603 | } |
604 | ||
c8d1351d | 605 | allow = allow_empty(opts, commit); |
706728a3 FC |
606 | if (allow < 0) { |
607 | res = allow; | |
608 | goto leave; | |
609 | } | |
c8d1351d FC |
610 | if (!opts->no_commit) |
611 | res = run_git_commit(defmsg, opts, allow); | |
612 | ||
613 | leave: | |
d74a4e57 | 614 | free_message(commit, &msg); |
043a4492 RR |
615 | free(defmsg); |
616 | ||
617 | return res; | |
618 | } | |
619 | ||
620 | static void prepare_revs(struct replay_opts *opts) | |
621 | { | |
a73e22e9 MZ |
622 | /* |
623 | * picking (but not reverting) ranges (but not individual revisions) | |
624 | * should be done in reverse | |
625 | */ | |
626 | if (opts->action == REPLAY_PICK && !opts->revs->no_walk) | |
043a4492 RR |
627 | opts->revs->reverse ^= 1; |
628 | ||
629 | if (prepare_revision_walk(opts->revs)) | |
630 | die(_("revision walk setup failed")); | |
631 | ||
632 | if (!opts->revs->commits) | |
633 | die(_("empty commit set passed")); | |
634 | } | |
635 | ||
636 | static void read_and_refresh_cache(struct replay_opts *opts) | |
637 | { | |
638 | static struct lock_file index_lock; | |
639 | int index_fd = hold_locked_index(&index_lock, 0); | |
640 | if (read_index_preload(&the_index, NULL) < 0) | |
641 | die(_("git %s: failed to read the index"), action_name(opts)); | |
642 | refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, NULL, NULL, NULL); | |
33c297aa | 643 | if (the_index.cache_changed && index_fd >= 0) { |
03b86647 | 644 | if (write_locked_index(&the_index, &index_lock, COMMIT_LOCK)) |
043a4492 RR |
645 | die(_("git %s: failed to refresh the index"), action_name(opts)); |
646 | } | |
647 | rollback_lock_file(&index_lock); | |
648 | } | |
649 | ||
043a4492 RR |
650 | static int format_todo(struct strbuf *buf, struct commit_list *todo_list, |
651 | struct replay_opts *opts) | |
652 | { | |
653 | struct commit_list *cur = NULL; | |
654 | const char *sha1_abbrev = NULL; | |
655 | const char *action_str = opts->action == REPLAY_REVERT ? "revert" : "pick"; | |
656 | const char *subject; | |
657 | int subject_len; | |
658 | ||
659 | for (cur = todo_list; cur; cur = cur->next) { | |
8597ea3a | 660 | const char *commit_buffer = get_commit_buffer(cur->item, NULL); |
043a4492 | 661 | sha1_abbrev = find_unique_abbrev(cur->item->object.sha1, DEFAULT_ABBREV); |
bc6b8fc1 | 662 | subject_len = find_commit_subject(commit_buffer, &subject); |
043a4492 RR |
663 | strbuf_addf(buf, "%s %s %.*s\n", action_str, sha1_abbrev, |
664 | subject_len, subject); | |
bc6b8fc1 | 665 | unuse_commit_buffer(cur->item, commit_buffer); |
043a4492 RR |
666 | } |
667 | return 0; | |
668 | } | |
669 | ||
670 | static struct commit *parse_insn_line(char *bol, char *eol, struct replay_opts *opts) | |
671 | { | |
672 | unsigned char commit_sha1[20]; | |
673 | enum replay_action action; | |
674 | char *end_of_object_name; | |
675 | int saved, status, padding; | |
676 | ||
59556548 | 677 | if (starts_with(bol, "pick")) { |
043a4492 RR |
678 | action = REPLAY_PICK; |
679 | bol += strlen("pick"); | |
59556548 | 680 | } else if (starts_with(bol, "revert")) { |
043a4492 RR |
681 | action = REPLAY_REVERT; |
682 | bol += strlen("revert"); | |
683 | } else | |
684 | return NULL; | |
685 | ||
686 | /* Eat up extra spaces/ tabs before object name */ | |
687 | padding = strspn(bol, " \t"); | |
688 | if (!padding) | |
689 | return NULL; | |
690 | bol += padding; | |
691 | ||
692 | end_of_object_name = bol + strcspn(bol, " \t\n"); | |
693 | saved = *end_of_object_name; | |
694 | *end_of_object_name = '\0'; | |
695 | status = get_sha1(bol, commit_sha1); | |
696 | *end_of_object_name = saved; | |
697 | ||
698 | /* | |
699 | * Verify that the action matches up with the one in | |
700 | * opts; we don't support arbitrary instructions | |
701 | */ | |
702 | if (action != opts->action) { | |
703 | const char *action_str; | |
704 | action_str = action == REPLAY_REVERT ? "revert" : "cherry-pick"; | |
705 | error(_("Cannot %s during a %s"), action_str, action_name(opts)); | |
706 | return NULL; | |
707 | } | |
708 | ||
709 | if (status < 0) | |
710 | return NULL; | |
711 | ||
712 | return lookup_commit_reference(commit_sha1); | |
713 | } | |
714 | ||
715 | static int parse_insn_buffer(char *buf, struct commit_list **todo_list, | |
716 | struct replay_opts *opts) | |
717 | { | |
718 | struct commit_list **next = todo_list; | |
719 | struct commit *commit; | |
720 | char *p = buf; | |
721 | int i; | |
722 | ||
723 | for (i = 1; *p; i++) { | |
724 | char *eol = strchrnul(p, '\n'); | |
725 | commit = parse_insn_line(p, eol, opts); | |
726 | if (!commit) | |
727 | return error(_("Could not parse line %d."), i); | |
728 | next = commit_list_append(commit, next); | |
729 | p = *eol ? eol + 1 : eol; | |
730 | } | |
731 | if (!*todo_list) | |
732 | return error(_("No commits parsed.")); | |
733 | return 0; | |
734 | } | |
735 | ||
736 | static void read_populate_todo(struct commit_list **todo_list, | |
737 | struct replay_opts *opts) | |
738 | { | |
739 | const char *todo_file = git_path(SEQ_TODO_FILE); | |
740 | struct strbuf buf = STRBUF_INIT; | |
741 | int fd, res; | |
742 | ||
743 | fd = open(todo_file, O_RDONLY); | |
744 | if (fd < 0) | |
745 | die_errno(_("Could not open %s"), todo_file); | |
746 | if (strbuf_read(&buf, fd, 0) < 0) { | |
747 | close(fd); | |
748 | strbuf_release(&buf); | |
749 | die(_("Could not read %s."), todo_file); | |
750 | } | |
751 | close(fd); | |
752 | ||
753 | res = parse_insn_buffer(buf.buf, todo_list, opts); | |
754 | strbuf_release(&buf); | |
755 | if (res) | |
756 | die(_("Unusable instruction sheet: %s"), todo_file); | |
757 | } | |
758 | ||
759 | static int populate_opts_cb(const char *key, const char *value, void *data) | |
760 | { | |
761 | struct replay_opts *opts = data; | |
762 | int error_flag = 1; | |
763 | ||
764 | if (!value) | |
765 | error_flag = 0; | |
766 | else if (!strcmp(key, "options.no-commit")) | |
767 | opts->no_commit = git_config_bool_or_int(key, value, &error_flag); | |
768 | else if (!strcmp(key, "options.edit")) | |
769 | opts->edit = git_config_bool_or_int(key, value, &error_flag); | |
770 | else if (!strcmp(key, "options.signoff")) | |
771 | opts->signoff = git_config_bool_or_int(key, value, &error_flag); | |
772 | else if (!strcmp(key, "options.record-origin")) | |
773 | opts->record_origin = git_config_bool_or_int(key, value, &error_flag); | |
774 | else if (!strcmp(key, "options.allow-ff")) | |
775 | opts->allow_ff = git_config_bool_or_int(key, value, &error_flag); | |
776 | else if (!strcmp(key, "options.mainline")) | |
777 | opts->mainline = git_config_int(key, value); | |
778 | else if (!strcmp(key, "options.strategy")) | |
779 | git_config_string(&opts->strategy, key, value); | |
3253553e NV |
780 | else if (!strcmp(key, "options.gpg-sign")) |
781 | git_config_string(&opts->gpg_sign, key, value); | |
043a4492 RR |
782 | else if (!strcmp(key, "options.strategy-option")) { |
783 | ALLOC_GROW(opts->xopts, opts->xopts_nr + 1, opts->xopts_alloc); | |
784 | opts->xopts[opts->xopts_nr++] = xstrdup(value); | |
785 | } else | |
786 | return error(_("Invalid key: %s"), key); | |
787 | ||
788 | if (!error_flag) | |
789 | return error(_("Invalid value for %s: %s"), key, value); | |
790 | ||
791 | return 0; | |
792 | } | |
793 | ||
794 | static void read_populate_opts(struct replay_opts **opts_ptr) | |
795 | { | |
796 | const char *opts_file = git_path(SEQ_OPTS_FILE); | |
797 | ||
798 | if (!file_exists(opts_file)) | |
799 | return; | |
800 | if (git_config_from_file(populate_opts_cb, opts_file, *opts_ptr) < 0) | |
801 | die(_("Malformed options sheet: %s"), opts_file); | |
802 | } | |
803 | ||
804 | static void walk_revs_populate_todo(struct commit_list **todo_list, | |
805 | struct replay_opts *opts) | |
806 | { | |
807 | struct commit *commit; | |
808 | struct commit_list **next; | |
809 | ||
810 | prepare_revs(opts); | |
811 | ||
812 | next = todo_list; | |
813 | while ((commit = get_revision(opts->revs))) | |
814 | next = commit_list_append(commit, next); | |
815 | } | |
816 | ||
817 | static int create_seq_dir(void) | |
818 | { | |
819 | const char *seq_dir = git_path(SEQ_DIR); | |
820 | ||
821 | if (file_exists(seq_dir)) { | |
822 | error(_("a cherry-pick or revert is already in progress")); | |
823 | advise(_("try \"git cherry-pick (--continue | --quit | --abort)\"")); | |
824 | return -1; | |
825 | } | |
826 | else if (mkdir(seq_dir, 0777) < 0) | |
827 | die_errno(_("Could not create sequencer directory %s"), seq_dir); | |
828 | return 0; | |
829 | } | |
830 | ||
831 | static void save_head(const char *head) | |
832 | { | |
833 | const char *head_file = git_path(SEQ_HEAD_FILE); | |
834 | static struct lock_file head_lock; | |
835 | struct strbuf buf = STRBUF_INIT; | |
836 | int fd; | |
837 | ||
838 | fd = hold_lock_file_for_update(&head_lock, head_file, LOCK_DIE_ON_ERROR); | |
839 | strbuf_addf(&buf, "%s\n", head); | |
840 | if (write_in_full(fd, buf.buf, buf.len) < 0) | |
841 | die_errno(_("Could not write to %s"), head_file); | |
842 | if (commit_lock_file(&head_lock) < 0) | |
843 | die(_("Error wrapping up %s."), head_file); | |
844 | } | |
845 | ||
846 | static int reset_for_rollback(const unsigned char *sha1) | |
847 | { | |
848 | const char *argv[4]; /* reset --merge <arg> + NULL */ | |
849 | argv[0] = "reset"; | |
850 | argv[1] = "--merge"; | |
851 | argv[2] = sha1_to_hex(sha1); | |
852 | argv[3] = NULL; | |
853 | return run_command_v_opt(argv, RUN_GIT_CMD); | |
854 | } | |
855 | ||
856 | static int rollback_single_pick(void) | |
857 | { | |
858 | unsigned char head_sha1[20]; | |
859 | ||
860 | if (!file_exists(git_path("CHERRY_PICK_HEAD")) && | |
861 | !file_exists(git_path("REVERT_HEAD"))) | |
862 | return error(_("no cherry-pick or revert in progress")); | |
863 | if (read_ref_full("HEAD", head_sha1, 0, NULL)) | |
864 | return error(_("cannot resolve HEAD")); | |
865 | if (is_null_sha1(head_sha1)) | |
866 | return error(_("cannot abort from a branch yet to be born")); | |
867 | return reset_for_rollback(head_sha1); | |
868 | } | |
869 | ||
870 | static int sequencer_rollback(struct replay_opts *opts) | |
871 | { | |
872 | const char *filename; | |
873 | FILE *f; | |
874 | unsigned char sha1[20]; | |
875 | struct strbuf buf = STRBUF_INIT; | |
876 | ||
877 | filename = git_path(SEQ_HEAD_FILE); | |
878 | f = fopen(filename, "r"); | |
879 | if (!f && errno == ENOENT) { | |
880 | /* | |
881 | * There is no multiple-cherry-pick in progress. | |
882 | * If CHERRY_PICK_HEAD or REVERT_HEAD indicates | |
883 | * a single-cherry-pick in progress, abort that. | |
884 | */ | |
885 | return rollback_single_pick(); | |
886 | } | |
887 | if (!f) | |
888 | return error(_("cannot open %s: %s"), filename, | |
889 | strerror(errno)); | |
890 | if (strbuf_getline(&buf, f, '\n')) { | |
891 | error(_("cannot read %s: %s"), filename, ferror(f) ? | |
892 | strerror(errno) : _("unexpected end of file")); | |
893 | fclose(f); | |
894 | goto fail; | |
895 | } | |
896 | fclose(f); | |
897 | if (get_sha1_hex(buf.buf, sha1) || buf.buf[40] != '\0') { | |
898 | error(_("stored pre-cherry-pick HEAD file '%s' is corrupt"), | |
899 | filename); | |
900 | goto fail; | |
901 | } | |
902 | if (reset_for_rollback(sha1)) | |
903 | goto fail; | |
904 | remove_sequencer_state(); | |
905 | strbuf_release(&buf); | |
906 | return 0; | |
907 | fail: | |
908 | strbuf_release(&buf); | |
909 | return -1; | |
910 | } | |
911 | ||
912 | static void save_todo(struct commit_list *todo_list, struct replay_opts *opts) | |
913 | { | |
914 | const char *todo_file = git_path(SEQ_TODO_FILE); | |
915 | static struct lock_file todo_lock; | |
916 | struct strbuf buf = STRBUF_INIT; | |
917 | int fd; | |
918 | ||
919 | fd = hold_lock_file_for_update(&todo_lock, todo_file, LOCK_DIE_ON_ERROR); | |
920 | if (format_todo(&buf, todo_list, opts) < 0) | |
921 | die(_("Could not format %s."), todo_file); | |
922 | if (write_in_full(fd, buf.buf, buf.len) < 0) { | |
923 | strbuf_release(&buf); | |
924 | die_errno(_("Could not write to %s"), todo_file); | |
925 | } | |
926 | if (commit_lock_file(&todo_lock) < 0) { | |
927 | strbuf_release(&buf); | |
928 | die(_("Error wrapping up %s."), todo_file); | |
929 | } | |
930 | strbuf_release(&buf); | |
931 | } | |
932 | ||
933 | static void save_opts(struct replay_opts *opts) | |
934 | { | |
935 | const char *opts_file = git_path(SEQ_OPTS_FILE); | |
936 | ||
937 | if (opts->no_commit) | |
938 | git_config_set_in_file(opts_file, "options.no-commit", "true"); | |
939 | if (opts->edit) | |
940 | git_config_set_in_file(opts_file, "options.edit", "true"); | |
941 | if (opts->signoff) | |
942 | git_config_set_in_file(opts_file, "options.signoff", "true"); | |
943 | if (opts->record_origin) | |
944 | git_config_set_in_file(opts_file, "options.record-origin", "true"); | |
945 | if (opts->allow_ff) | |
946 | git_config_set_in_file(opts_file, "options.allow-ff", "true"); | |
947 | if (opts->mainline) { | |
948 | struct strbuf buf = STRBUF_INIT; | |
949 | strbuf_addf(&buf, "%d", opts->mainline); | |
950 | git_config_set_in_file(opts_file, "options.mainline", buf.buf); | |
951 | strbuf_release(&buf); | |
952 | } | |
953 | if (opts->strategy) | |
954 | git_config_set_in_file(opts_file, "options.strategy", opts->strategy); | |
3253553e NV |
955 | if (opts->gpg_sign) |
956 | git_config_set_in_file(opts_file, "options.gpg-sign", opts->gpg_sign); | |
043a4492 RR |
957 | if (opts->xopts) { |
958 | int i; | |
959 | for (i = 0; i < opts->xopts_nr; i++) | |
960 | git_config_set_multivar_in_file(opts_file, | |
961 | "options.strategy-option", | |
962 | opts->xopts[i], "^$", 0); | |
963 | } | |
964 | } | |
965 | ||
966 | static int pick_commits(struct commit_list *todo_list, struct replay_opts *opts) | |
967 | { | |
968 | struct commit_list *cur; | |
969 | int res; | |
970 | ||
971 | setenv(GIT_REFLOG_ACTION, action_name(opts), 0); | |
972 | if (opts->allow_ff) | |
973 | assert(!(opts->signoff || opts->no_commit || | |
974 | opts->record_origin || opts->edit)); | |
975 | read_and_refresh_cache(opts); | |
976 | ||
977 | for (cur = todo_list; cur; cur = cur->next) { | |
978 | save_todo(cur, opts); | |
979 | res = do_pick_commit(cur->item, opts); | |
980 | if (res) | |
981 | return res; | |
982 | } | |
983 | ||
984 | /* | |
985 | * Sequence of picks finished successfully; cleanup by | |
986 | * removing the .git/sequencer directory | |
987 | */ | |
988 | remove_sequencer_state(); | |
989 | return 0; | |
990 | } | |
991 | ||
992 | static int continue_single_pick(void) | |
993 | { | |
994 | const char *argv[] = { "commit", NULL }; | |
995 | ||
996 | if (!file_exists(git_path("CHERRY_PICK_HEAD")) && | |
997 | !file_exists(git_path("REVERT_HEAD"))) | |
998 | return error(_("no cherry-pick or revert in progress")); | |
999 | return run_command_v_opt(argv, RUN_GIT_CMD); | |
1000 | } | |
1001 | ||
1002 | static int sequencer_continue(struct replay_opts *opts) | |
1003 | { | |
1004 | struct commit_list *todo_list = NULL; | |
1005 | ||
1006 | if (!file_exists(git_path(SEQ_TODO_FILE))) | |
1007 | return continue_single_pick(); | |
1008 | read_populate_opts(&opts); | |
1009 | read_populate_todo(&todo_list, opts); | |
1010 | ||
1011 | /* Verify that the conflict has been resolved */ | |
1012 | if (file_exists(git_path("CHERRY_PICK_HEAD")) || | |
1013 | file_exists(git_path("REVERT_HEAD"))) { | |
1014 | int ret = continue_single_pick(); | |
1015 | if (ret) | |
1016 | return ret; | |
1017 | } | |
1018 | if (index_differs_from("HEAD", 0)) | |
1019 | return error_dirty_index(opts); | |
1020 | todo_list = todo_list->next; | |
1021 | return pick_commits(todo_list, opts); | |
1022 | } | |
1023 | ||
1024 | static int single_pick(struct commit *cmit, struct replay_opts *opts) | |
1025 | { | |
1026 | setenv(GIT_REFLOG_ACTION, action_name(opts), 0); | |
1027 | return do_pick_commit(cmit, opts); | |
1028 | } | |
1029 | ||
1030 | int sequencer_pick_revisions(struct replay_opts *opts) | |
1031 | { | |
1032 | struct commit_list *todo_list = NULL; | |
1033 | unsigned char sha1[20]; | |
21246dbb | 1034 | int i; |
043a4492 RR |
1035 | |
1036 | if (opts->subcommand == REPLAY_NONE) | |
1037 | assert(opts->revs); | |
1038 | ||
1039 | read_and_refresh_cache(opts); | |
1040 | ||
1041 | /* | |
1042 | * Decide what to do depending on the arguments; a fresh | |
1043 | * cherry-pick should be handled differently from an existing | |
1044 | * one that is being continued | |
1045 | */ | |
1046 | if (opts->subcommand == REPLAY_REMOVE_STATE) { | |
1047 | remove_sequencer_state(); | |
1048 | return 0; | |
1049 | } | |
1050 | if (opts->subcommand == REPLAY_ROLLBACK) | |
1051 | return sequencer_rollback(opts); | |
1052 | if (opts->subcommand == REPLAY_CONTINUE) | |
1053 | return sequencer_continue(opts); | |
1054 | ||
21246dbb MV |
1055 | for (i = 0; i < opts->revs->pending.nr; i++) { |
1056 | unsigned char sha1[20]; | |
1057 | const char *name = opts->revs->pending.objects[i].name; | |
1058 | ||
1059 | /* This happens when using --stdin. */ | |
1060 | if (!strlen(name)) | |
1061 | continue; | |
1062 | ||
1063 | if (!get_sha1(name, sha1)) { | |
7c0b0d8d JH |
1064 | if (!lookup_commit_reference_gently(sha1, 1)) { |
1065 | enum object_type type = sha1_object_info(sha1, NULL); | |
21246dbb | 1066 | die(_("%s: can't cherry-pick a %s"), name, typename(type)); |
7c0b0d8d | 1067 | } |
21246dbb MV |
1068 | } else |
1069 | die(_("%s: bad revision"), name); | |
1070 | } | |
1071 | ||
043a4492 RR |
1072 | /* |
1073 | * If we were called as "git cherry-pick <commit>", just | |
1074 | * cherry-pick/revert it, set CHERRY_PICK_HEAD / | |
1075 | * REVERT_HEAD, and don't touch the sequencer state. | |
1076 | * This means it is possible to cherry-pick in the middle | |
1077 | * of a cherry-pick sequence. | |
1078 | */ | |
1079 | if (opts->revs->cmdline.nr == 1 && | |
1080 | opts->revs->cmdline.rev->whence == REV_CMD_REV && | |
1081 | opts->revs->no_walk && | |
1082 | !opts->revs->cmdline.rev->flags) { | |
1083 | struct commit *cmit; | |
1084 | if (prepare_revision_walk(opts->revs)) | |
1085 | die(_("revision walk setup failed")); | |
1086 | cmit = get_revision(opts->revs); | |
1087 | if (!cmit || get_revision(opts->revs)) | |
1088 | die("BUG: expected exactly one commit from walk"); | |
1089 | return single_pick(cmit, opts); | |
1090 | } | |
1091 | ||
1092 | /* | |
1093 | * Start a new cherry-pick/ revert sequence; but | |
1094 | * first, make sure that an existing one isn't in | |
1095 | * progress | |
1096 | */ | |
1097 | ||
1098 | walk_revs_populate_todo(&todo_list, opts); | |
1099 | if (create_seq_dir() < 0) | |
1100 | return -1; | |
1101 | if (get_sha1("HEAD", sha1)) { | |
1102 | if (opts->action == REPLAY_REVERT) | |
1103 | return error(_("Can't revert as initial commit")); | |
1104 | return error(_("Can't cherry-pick into empty head")); | |
1105 | } | |
1106 | save_head(sha1_to_hex(sha1)); | |
1107 | save_opts(opts); | |
1108 | return pick_commits(todo_list, opts); | |
1109 | } | |
5ed75e2a | 1110 | |
bab4d109 | 1111 | void append_signoff(struct strbuf *msgbuf, int ignore_footer, unsigned flag) |
5ed75e2a | 1112 | { |
bab4d109 | 1113 | unsigned no_dup_sob = flag & APPEND_SIGNOFF_DEDUP; |
5ed75e2a | 1114 | struct strbuf sob = STRBUF_INIT; |
bab4d109 | 1115 | int has_footer; |
5ed75e2a MV |
1116 | |
1117 | strbuf_addstr(&sob, sign_off_header); | |
1118 | strbuf_addstr(&sob, fmt_name(getenv("GIT_COMMITTER_NAME"), | |
1119 | getenv("GIT_COMMITTER_EMAIL"))); | |
1120 | strbuf_addch(&sob, '\n'); | |
bab4d109 BC |
1121 | |
1122 | /* | |
1123 | * If the whole message buffer is equal to the sob, pretend that we | |
1124 | * found a conforming footer with a matching sob | |
1125 | */ | |
1126 | if (msgbuf->len - ignore_footer == sob.len && | |
1127 | !strncmp(msgbuf->buf, sob.buf, sob.len)) | |
1128 | has_footer = 3; | |
1129 | else | |
1130 | has_footer = has_conforming_footer(msgbuf, &sob, ignore_footer); | |
1131 | ||
33f2f9ab BC |
1132 | if (!has_footer) { |
1133 | const char *append_newlines = NULL; | |
1134 | size_t len = msgbuf->len - ignore_footer; | |
1135 | ||
8c613fd5 BC |
1136 | if (!len) { |
1137 | /* | |
1138 | * The buffer is completely empty. Leave foom for | |
1139 | * the title and body to be filled in by the user. | |
1140 | */ | |
33f2f9ab | 1141 | append_newlines = "\n\n"; |
8c613fd5 BC |
1142 | } else if (msgbuf->buf[len - 1] != '\n') { |
1143 | /* | |
1144 | * Incomplete line. Complete the line and add a | |
1145 | * blank one so that there is an empty line between | |
1146 | * the message body and the sob. | |
1147 | */ | |
1148 | append_newlines = "\n\n"; | |
1149 | } else if (len == 1) { | |
1150 | /* | |
1151 | * Buffer contains a single newline. Add another | |
1152 | * so that we leave room for the title and body. | |
1153 | */ | |
1154 | append_newlines = "\n"; | |
1155 | } else if (msgbuf->buf[len - 2] != '\n') { | |
1156 | /* | |
1157 | * Buffer ends with a single newline. Add another | |
1158 | * so that there is an empty line between the message | |
1159 | * body and the sob. | |
1160 | */ | |
33f2f9ab | 1161 | append_newlines = "\n"; |
8c613fd5 | 1162 | } /* else, the buffer already ends with two newlines. */ |
33f2f9ab BC |
1163 | |
1164 | if (append_newlines) | |
1165 | strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0, | |
1166 | append_newlines, strlen(append_newlines)); | |
5ed75e2a | 1167 | } |
bab4d109 BC |
1168 | |
1169 | if (has_footer != 3 && (!no_dup_sob || has_footer != 2)) | |
1170 | strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0, | |
1171 | sob.buf, sob.len); | |
1172 | ||
5ed75e2a MV |
1173 | strbuf_release(&sob); |
1174 | } |