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1 | #include "cache.h" | |
2 | #include "lockfile.h" | |
3 | #include "sequencer.h" | |
4 | #include "dir.h" | |
5 | #include "object.h" | |
6 | #include "commit.h" | |
7 | #include "tag.h" | |
8 | #include "run-command.h" | |
9 | #include "exec_cmd.h" | |
10 | #include "utf8.h" | |
11 | #include "cache-tree.h" | |
12 | #include "diff.h" | |
13 | #include "revision.h" | |
14 | #include "rerere.h" | |
15 | #include "merge-recursive.h" | |
16 | #include "refs.h" | |
17 | #include "argv-array.h" | |
18 | ||
19 | #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION" | |
20 | ||
21 | const char sign_off_header[] = "Signed-off-by: "; | |
22 | static const char cherry_picked_prefix[] = "(cherry picked from commit "; | |
23 | ||
24 | static GIT_PATH_FUNC(git_path_todo_file, SEQ_TODO_FILE) | |
25 | static GIT_PATH_FUNC(git_path_opts_file, SEQ_OPTS_FILE) | |
26 | static GIT_PATH_FUNC(git_path_seq_dir, SEQ_DIR) | |
27 | static GIT_PATH_FUNC(git_path_head_file, SEQ_HEAD_FILE) | |
28 | ||
29 | static int is_rfc2822_line(const char *buf, int len) | |
30 | { | |
31 | int i; | |
32 | ||
33 | for (i = 0; i < len; i++) { | |
34 | int ch = buf[i]; | |
35 | if (ch == ':') | |
36 | return 1; | |
37 | if (!isalnum(ch) && ch != '-') | |
38 | break; | |
39 | } | |
40 | ||
41 | return 0; | |
42 | } | |
43 | ||
44 | static int is_cherry_picked_from_line(const char *buf, int len) | |
45 | { | |
46 | /* | |
47 | * We only care that it looks roughly like (cherry picked from ...) | |
48 | */ | |
49 | return len > strlen(cherry_picked_prefix) + 1 && | |
50 | starts_with(buf, cherry_picked_prefix) && buf[len - 1] == ')'; | |
51 | } | |
52 | ||
53 | /* | |
54 | * Returns 0 for non-conforming footer | |
55 | * Returns 1 for conforming footer | |
56 | * Returns 2 when sob exists within conforming footer | |
57 | * Returns 3 when sob exists within conforming footer as last entry | |
58 | */ | |
59 | static int has_conforming_footer(struct strbuf *sb, struct strbuf *sob, | |
60 | int ignore_footer) | |
61 | { | |
62 | char prev; | |
63 | int i, k; | |
64 | int len = sb->len - ignore_footer; | |
65 | const char *buf = sb->buf; | |
66 | int found_sob = 0; | |
67 | ||
68 | /* footer must end with newline */ | |
69 | if (!len || buf[len - 1] != '\n') | |
70 | return 0; | |
71 | ||
72 | prev = '\0'; | |
73 | for (i = len - 1; i > 0; i--) { | |
74 | char ch = buf[i]; | |
75 | if (prev == '\n' && ch == '\n') /* paragraph break */ | |
76 | break; | |
77 | prev = ch; | |
78 | } | |
79 | ||
80 | /* require at least one blank line */ | |
81 | if (prev != '\n' || buf[i] != '\n') | |
82 | return 0; | |
83 | ||
84 | /* advance to start of last paragraph */ | |
85 | while (i < len - 1 && buf[i] == '\n') | |
86 | i++; | |
87 | ||
88 | for (; i < len; i = k) { | |
89 | int found_rfc2822; | |
90 | ||
91 | for (k = i; k < len && buf[k] != '\n'; k++) | |
92 | ; /* do nothing */ | |
93 | k++; | |
94 | ||
95 | found_rfc2822 = is_rfc2822_line(buf + i, k - i - 1); | |
96 | if (found_rfc2822 && sob && | |
97 | !strncmp(buf + i, sob->buf, sob->len)) | |
98 | found_sob = k; | |
99 | ||
100 | if (!(found_rfc2822 || | |
101 | is_cherry_picked_from_line(buf + i, k - i - 1))) | |
102 | return 0; | |
103 | } | |
104 | if (found_sob == i) | |
105 | return 3; | |
106 | if (found_sob) | |
107 | return 2; | |
108 | return 1; | |
109 | } | |
110 | ||
111 | static void remove_sequencer_state(void) | |
112 | { | |
113 | struct strbuf seq_dir = STRBUF_INIT; | |
114 | ||
115 | strbuf_addstr(&seq_dir, git_path(SEQ_DIR)); | |
116 | remove_dir_recursively(&seq_dir, 0); | |
117 | strbuf_release(&seq_dir); | |
118 | } | |
119 | ||
120 | static const char *action_name(const struct replay_opts *opts) | |
121 | { | |
122 | return opts->action == REPLAY_REVERT ? "revert" : "cherry-pick"; | |
123 | } | |
124 | ||
125 | struct commit_message { | |
126 | char *parent_label; | |
127 | char *label; | |
128 | char *subject; | |
129 | const char *message; | |
130 | }; | |
131 | ||
132 | static int get_message(struct commit *commit, struct commit_message *out) | |
133 | { | |
134 | const char *abbrev, *subject; | |
135 | int subject_len; | |
136 | ||
137 | out->message = logmsg_reencode(commit, NULL, get_commit_output_encoding()); | |
138 | abbrev = find_unique_abbrev(commit->object.oid.hash, DEFAULT_ABBREV); | |
139 | ||
140 | subject_len = find_commit_subject(out->message, &subject); | |
141 | ||
142 | out->subject = xmemdupz(subject, subject_len); | |
143 | out->label = xstrfmt("%s... %s", abbrev, out->subject); | |
144 | out->parent_label = xstrfmt("parent of %s", out->label); | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
149 | static void free_message(struct commit *commit, struct commit_message *msg) | |
150 | { | |
151 | free(msg->parent_label); | |
152 | free(msg->label); | |
153 | free(msg->subject); | |
154 | unuse_commit_buffer(commit, msg->message); | |
155 | } | |
156 | ||
157 | static void print_advice(int show_hint, struct replay_opts *opts) | |
158 | { | |
159 | char *msg = getenv("GIT_CHERRY_PICK_HELP"); | |
160 | ||
161 | if (msg) { | |
162 | fprintf(stderr, "%s\n", msg); | |
163 | /* | |
164 | * A conflict has occurred but the porcelain | |
165 | * (typically rebase --interactive) wants to take care | |
166 | * of the commit itself so remove CHERRY_PICK_HEAD | |
167 | */ | |
168 | unlink(git_path_cherry_pick_head()); | |
169 | return; | |
170 | } | |
171 | ||
172 | if (show_hint) { | |
173 | if (opts->no_commit) | |
174 | advise(_("after resolving the conflicts, mark the corrected paths\n" | |
175 | "with 'git add <paths>' or 'git rm <paths>'")); | |
176 | else | |
177 | advise(_("after resolving the conflicts, mark the corrected paths\n" | |
178 | "with 'git add <paths>' or 'git rm <paths>'\n" | |
179 | "and commit the result with 'git commit'")); | |
180 | } | |
181 | } | |
182 | ||
183 | static int write_message(struct strbuf *msgbuf, const char *filename) | |
184 | { | |
185 | static struct lock_file msg_file; | |
186 | ||
187 | int msg_fd = hold_lock_file_for_update(&msg_file, filename, 0); | |
188 | if (msg_fd < 0) | |
189 | return error_errno(_("Could not lock '%s'"), filename); | |
190 | if (write_in_full(msg_fd, msgbuf->buf, msgbuf->len) < 0) | |
191 | return error_errno(_("Could not write to %s"), filename); | |
192 | strbuf_release(msgbuf); | |
193 | if (commit_lock_file(&msg_file) < 0) | |
194 | return error(_("Error wrapping up %s."), filename); | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
199 | static struct tree *empty_tree(void) | |
200 | { | |
201 | return lookup_tree(EMPTY_TREE_SHA1_BIN); | |
202 | } | |
203 | ||
204 | static int error_dirty_index(struct replay_opts *opts) | |
205 | { | |
206 | if (read_cache_unmerged()) | |
207 | return error_resolve_conflict(action_name(opts)); | |
208 | ||
209 | /* Different translation strings for cherry-pick and revert */ | |
210 | if (opts->action == REPLAY_PICK) | |
211 | error(_("Your local changes would be overwritten by cherry-pick.")); | |
212 | else | |
213 | error(_("Your local changes would be overwritten by revert.")); | |
214 | ||
215 | if (advice_commit_before_merge) | |
216 | advise(_("Commit your changes or stash them to proceed.")); | |
217 | return -1; | |
218 | } | |
219 | ||
220 | static int fast_forward_to(const unsigned char *to, const unsigned char *from, | |
221 | int unborn, struct replay_opts *opts) | |
222 | { | |
223 | struct ref_transaction *transaction; | |
224 | struct strbuf sb = STRBUF_INIT; | |
225 | struct strbuf err = STRBUF_INIT; | |
226 | ||
227 | read_cache(); | |
228 | if (checkout_fast_forward(from, to, 1)) | |
229 | exit(128); /* the callee should have complained already */ | |
230 | ||
231 | strbuf_addf(&sb, _("%s: fast-forward"), action_name(opts)); | |
232 | ||
233 | transaction = ref_transaction_begin(&err); | |
234 | if (!transaction || | |
235 | ref_transaction_update(transaction, "HEAD", | |
236 | to, unborn ? null_sha1 : from, | |
237 | 0, sb.buf, &err) || | |
238 | ref_transaction_commit(transaction, &err)) { | |
239 | ref_transaction_free(transaction); | |
240 | error("%s", err.buf); | |
241 | strbuf_release(&sb); | |
242 | strbuf_release(&err); | |
243 | return -1; | |
244 | } | |
245 | ||
246 | strbuf_release(&sb); | |
247 | strbuf_release(&err); | |
248 | ref_transaction_free(transaction); | |
249 | return 0; | |
250 | } | |
251 | ||
252 | void append_conflicts_hint(struct strbuf *msgbuf) | |
253 | { | |
254 | int i; | |
255 | ||
256 | strbuf_addch(msgbuf, '\n'); | |
257 | strbuf_commented_addf(msgbuf, "Conflicts:\n"); | |
258 | for (i = 0; i < active_nr;) { | |
259 | const struct cache_entry *ce = active_cache[i++]; | |
260 | if (ce_stage(ce)) { | |
261 | strbuf_commented_addf(msgbuf, "\t%s\n", ce->name); | |
262 | while (i < active_nr && !strcmp(ce->name, | |
263 | active_cache[i]->name)) | |
264 | i++; | |
265 | } | |
266 | } | |
267 | } | |
268 | ||
269 | static int do_recursive_merge(struct commit *base, struct commit *next, | |
270 | const char *base_label, const char *next_label, | |
271 | unsigned char *head, struct strbuf *msgbuf, | |
272 | struct replay_opts *opts) | |
273 | { | |
274 | struct merge_options o; | |
275 | struct tree *result, *next_tree, *base_tree, *head_tree; | |
276 | int clean; | |
277 | const char **xopt; | |
278 | static struct lock_file index_lock; | |
279 | ||
280 | hold_locked_index(&index_lock, 1); | |
281 | ||
282 | read_cache(); | |
283 | ||
284 | init_merge_options(&o); | |
285 | o.ancestor = base ? base_label : "(empty tree)"; | |
286 | o.branch1 = "HEAD"; | |
287 | o.branch2 = next ? next_label : "(empty tree)"; | |
288 | ||
289 | head_tree = parse_tree_indirect(head); | |
290 | next_tree = next ? next->tree : empty_tree(); | |
291 | base_tree = base ? base->tree : empty_tree(); | |
292 | ||
293 | for (xopt = opts->xopts; xopt != opts->xopts + opts->xopts_nr; xopt++) | |
294 | parse_merge_opt(&o, *xopt); | |
295 | ||
296 | clean = merge_trees(&o, | |
297 | head_tree, | |
298 | next_tree, base_tree, &result); | |
299 | strbuf_release(&o.obuf); | |
300 | if (clean < 0) | |
301 | return clean; | |
302 | ||
303 | if (active_cache_changed && | |
304 | write_locked_index(&the_index, &index_lock, COMMIT_LOCK)) | |
305 | /* TRANSLATORS: %s will be "revert" or "cherry-pick" */ | |
306 | return error(_("%s: Unable to write new index file"), | |
307 | action_name(opts)); | |
308 | rollback_lock_file(&index_lock); | |
309 | ||
310 | if (opts->signoff) | |
311 | append_signoff(msgbuf, 0, 0); | |
312 | ||
313 | if (!clean) | |
314 | append_conflicts_hint(msgbuf); | |
315 | ||
316 | return !clean; | |
317 | } | |
318 | ||
319 | static int is_index_unchanged(void) | |
320 | { | |
321 | unsigned char head_sha1[20]; | |
322 | struct commit *head_commit; | |
323 | ||
324 | if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, head_sha1, NULL)) | |
325 | return error(_("Could not resolve HEAD commit\n")); | |
326 | ||
327 | head_commit = lookup_commit(head_sha1); | |
328 | ||
329 | /* | |
330 | * If head_commit is NULL, check_commit, called from | |
331 | * lookup_commit, would have indicated that head_commit is not | |
332 | * a commit object already. parse_commit() will return failure | |
333 | * without further complaints in such a case. Otherwise, if | |
334 | * the commit is invalid, parse_commit() will complain. So | |
335 | * there is nothing for us to say here. Just return failure. | |
336 | */ | |
337 | if (parse_commit(head_commit)) | |
338 | return -1; | |
339 | ||
340 | if (!active_cache_tree) | |
341 | active_cache_tree = cache_tree(); | |
342 | ||
343 | if (!cache_tree_fully_valid(active_cache_tree)) | |
344 | if (cache_tree_update(&the_index, 0)) | |
345 | return error(_("Unable to update cache tree\n")); | |
346 | ||
347 | return !hashcmp(active_cache_tree->sha1, head_commit->tree->object.oid.hash); | |
348 | } | |
349 | ||
350 | /* | |
351 | * If we are cherry-pick, and if the merge did not result in | |
352 | * hand-editing, we will hit this commit and inherit the original | |
353 | * author date and name. | |
354 | * If we are revert, or if our cherry-pick results in a hand merge, | |
355 | * we had better say that the current user is responsible for that. | |
356 | */ | |
357 | static int run_git_commit(const char *defmsg, struct replay_opts *opts, | |
358 | int allow_empty) | |
359 | { | |
360 | struct argv_array array; | |
361 | int rc; | |
362 | const char *value; | |
363 | ||
364 | argv_array_init(&array); | |
365 | argv_array_push(&array, "commit"); | |
366 | argv_array_push(&array, "-n"); | |
367 | ||
368 | if (opts->gpg_sign) | |
369 | argv_array_pushf(&array, "-S%s", opts->gpg_sign); | |
370 | if (opts->signoff) | |
371 | argv_array_push(&array, "-s"); | |
372 | if (!opts->edit) { | |
373 | argv_array_push(&array, "-F"); | |
374 | argv_array_push(&array, defmsg); | |
375 | if (!opts->signoff && | |
376 | !opts->record_origin && | |
377 | git_config_get_value("commit.cleanup", &value)) | |
378 | argv_array_push(&array, "--cleanup=verbatim"); | |
379 | } | |
380 | ||
381 | if (allow_empty) | |
382 | argv_array_push(&array, "--allow-empty"); | |
383 | ||
384 | if (opts->allow_empty_message) | |
385 | argv_array_push(&array, "--allow-empty-message"); | |
386 | ||
387 | rc = run_command_v_opt(array.argv, RUN_GIT_CMD); | |
388 | argv_array_clear(&array); | |
389 | return rc; | |
390 | } | |
391 | ||
392 | static int is_original_commit_empty(struct commit *commit) | |
393 | { | |
394 | const unsigned char *ptree_sha1; | |
395 | ||
396 | if (parse_commit(commit)) | |
397 | return error(_("Could not parse commit %s\n"), | |
398 | oid_to_hex(&commit->object.oid)); | |
399 | if (commit->parents) { | |
400 | struct commit *parent = commit->parents->item; | |
401 | if (parse_commit(parent)) | |
402 | return error(_("Could not parse parent commit %s\n"), | |
403 | oid_to_hex(&parent->object.oid)); | |
404 | ptree_sha1 = parent->tree->object.oid.hash; | |
405 | } else { | |
406 | ptree_sha1 = EMPTY_TREE_SHA1_BIN; /* commit is root */ | |
407 | } | |
408 | ||
409 | return !hashcmp(ptree_sha1, commit->tree->object.oid.hash); | |
410 | } | |
411 | ||
412 | /* | |
413 | * Do we run "git commit" with "--allow-empty"? | |
414 | */ | |
415 | static int allow_empty(struct replay_opts *opts, struct commit *commit) | |
416 | { | |
417 | int index_unchanged, empty_commit; | |
418 | ||
419 | /* | |
420 | * Three cases: | |
421 | * | |
422 | * (1) we do not allow empty at all and error out. | |
423 | * | |
424 | * (2) we allow ones that were initially empty, but | |
425 | * forbid the ones that become empty; | |
426 | * | |
427 | * (3) we allow both. | |
428 | */ | |
429 | if (!opts->allow_empty) | |
430 | return 0; /* let "git commit" barf as necessary */ | |
431 | ||
432 | index_unchanged = is_index_unchanged(); | |
433 | if (index_unchanged < 0) | |
434 | return index_unchanged; | |
435 | if (!index_unchanged) | |
436 | return 0; /* we do not have to say --allow-empty */ | |
437 | ||
438 | if (opts->keep_redundant_commits) | |
439 | return 1; | |
440 | ||
441 | empty_commit = is_original_commit_empty(commit); | |
442 | if (empty_commit < 0) | |
443 | return empty_commit; | |
444 | if (!empty_commit) | |
445 | return 0; | |
446 | else | |
447 | return 1; | |
448 | } | |
449 | ||
450 | static int do_pick_commit(struct commit *commit, struct replay_opts *opts) | |
451 | { | |
452 | unsigned char head[20]; | |
453 | struct commit *base, *next, *parent; | |
454 | const char *base_label, *next_label; | |
455 | struct commit_message msg = { NULL, NULL, NULL, NULL }; | |
456 | struct strbuf msgbuf = STRBUF_INIT; | |
457 | int res, unborn = 0, allow; | |
458 | ||
459 | if (opts->no_commit) { | |
460 | /* | |
461 | * We do not intend to commit immediately. We just want to | |
462 | * merge the differences in, so let's compute the tree | |
463 | * that represents the "current" state for merge-recursive | |
464 | * to work on. | |
465 | */ | |
466 | if (write_cache_as_tree(head, 0, NULL)) | |
467 | return error(_("Your index file is unmerged.")); | |
468 | } else { | |
469 | unborn = get_sha1("HEAD", head); | |
470 | if (unborn) | |
471 | hashcpy(head, EMPTY_TREE_SHA1_BIN); | |
472 | if (index_differs_from(unborn ? EMPTY_TREE_SHA1_HEX : "HEAD", 0)) | |
473 | return error_dirty_index(opts); | |
474 | } | |
475 | discard_cache(); | |
476 | ||
477 | if (!commit->parents) { | |
478 | parent = NULL; | |
479 | } | |
480 | else if (commit->parents->next) { | |
481 | /* Reverting or cherry-picking a merge commit */ | |
482 | int cnt; | |
483 | struct commit_list *p; | |
484 | ||
485 | if (!opts->mainline) | |
486 | return error(_("Commit %s is a merge but no -m option was given."), | |
487 | oid_to_hex(&commit->object.oid)); | |
488 | ||
489 | for (cnt = 1, p = commit->parents; | |
490 | cnt != opts->mainline && p; | |
491 | cnt++) | |
492 | p = p->next; | |
493 | if (cnt != opts->mainline || !p) | |
494 | return error(_("Commit %s does not have parent %d"), | |
495 | oid_to_hex(&commit->object.oid), opts->mainline); | |
496 | parent = p->item; | |
497 | } else if (0 < opts->mainline) | |
498 | return error(_("Mainline was specified but commit %s is not a merge."), | |
499 | oid_to_hex(&commit->object.oid)); | |
500 | else | |
501 | parent = commit->parents->item; | |
502 | ||
503 | if (opts->allow_ff && | |
504 | ((parent && !hashcmp(parent->object.oid.hash, head)) || | |
505 | (!parent && unborn))) | |
506 | return fast_forward_to(commit->object.oid.hash, head, unborn, opts); | |
507 | ||
508 | if (parent && parse_commit(parent) < 0) | |
509 | /* TRANSLATORS: The first %s will be "revert" or | |
510 | "cherry-pick", the second %s a SHA1 */ | |
511 | return error(_("%s: cannot parse parent commit %s"), | |
512 | action_name(opts), oid_to_hex(&parent->object.oid)); | |
513 | ||
514 | if (get_message(commit, &msg) != 0) | |
515 | return error(_("Cannot get commit message for %s"), | |
516 | oid_to_hex(&commit->object.oid)); | |
517 | ||
518 | /* | |
519 | * "commit" is an existing commit. We would want to apply | |
520 | * the difference it introduces since its first parent "prev" | |
521 | * on top of the current HEAD if we are cherry-pick. Or the | |
522 | * reverse of it if we are revert. | |
523 | */ | |
524 | ||
525 | if (opts->action == REPLAY_REVERT) { | |
526 | base = commit; | |
527 | base_label = msg.label; | |
528 | next = parent; | |
529 | next_label = msg.parent_label; | |
530 | strbuf_addstr(&msgbuf, "Revert \""); | |
531 | strbuf_addstr(&msgbuf, msg.subject); | |
532 | strbuf_addstr(&msgbuf, "\"\n\nThis reverts commit "); | |
533 | strbuf_addstr(&msgbuf, oid_to_hex(&commit->object.oid)); | |
534 | ||
535 | if (commit->parents && commit->parents->next) { | |
536 | strbuf_addstr(&msgbuf, ", reversing\nchanges made to "); | |
537 | strbuf_addstr(&msgbuf, oid_to_hex(&parent->object.oid)); | |
538 | } | |
539 | strbuf_addstr(&msgbuf, ".\n"); | |
540 | } else { | |
541 | const char *p; | |
542 | ||
543 | base = parent; | |
544 | base_label = msg.parent_label; | |
545 | next = commit; | |
546 | next_label = msg.label; | |
547 | ||
548 | /* | |
549 | * Append the commit log message to msgbuf; it starts | |
550 | * after the tree, parent, author, committer | |
551 | * information followed by "\n\n". | |
552 | */ | |
553 | p = strstr(msg.message, "\n\n"); | |
554 | if (p) | |
555 | strbuf_addstr(&msgbuf, skip_blank_lines(p + 2)); | |
556 | ||
557 | if (opts->record_origin) { | |
558 | if (!has_conforming_footer(&msgbuf, NULL, 0)) | |
559 | strbuf_addch(&msgbuf, '\n'); | |
560 | strbuf_addstr(&msgbuf, cherry_picked_prefix); | |
561 | strbuf_addstr(&msgbuf, oid_to_hex(&commit->object.oid)); | |
562 | strbuf_addstr(&msgbuf, ")\n"); | |
563 | } | |
564 | } | |
565 | ||
566 | if (!opts->strategy || !strcmp(opts->strategy, "recursive") || opts->action == REPLAY_REVERT) { | |
567 | res = do_recursive_merge(base, next, base_label, next_label, | |
568 | head, &msgbuf, opts); | |
569 | if (res < 0) | |
570 | return res; | |
571 | res |= write_message(&msgbuf, git_path_merge_msg()); | |
572 | } else { | |
573 | struct commit_list *common = NULL; | |
574 | struct commit_list *remotes = NULL; | |
575 | ||
576 | res = write_message(&msgbuf, git_path_merge_msg()); | |
577 | ||
578 | commit_list_insert(base, &common); | |
579 | commit_list_insert(next, &remotes); | |
580 | res |= try_merge_command(opts->strategy, opts->xopts_nr, opts->xopts, | |
581 | common, sha1_to_hex(head), remotes); | |
582 | free_commit_list(common); | |
583 | free_commit_list(remotes); | |
584 | } | |
585 | ||
586 | /* | |
587 | * If the merge was clean or if it failed due to conflict, we write | |
588 | * CHERRY_PICK_HEAD for the subsequent invocation of commit to use. | |
589 | * However, if the merge did not even start, then we don't want to | |
590 | * write it at all. | |
591 | */ | |
592 | if (opts->action == REPLAY_PICK && !opts->no_commit && (res == 0 || res == 1) && | |
593 | update_ref(NULL, "CHERRY_PICK_HEAD", commit->object.oid.hash, NULL, | |
594 | REF_NODEREF, UPDATE_REFS_MSG_ON_ERR)) | |
595 | res = -1; | |
596 | if (opts->action == REPLAY_REVERT && ((opts->no_commit && res == 0) || res == 1) && | |
597 | update_ref(NULL, "REVERT_HEAD", commit->object.oid.hash, NULL, | |
598 | REF_NODEREF, UPDATE_REFS_MSG_ON_ERR)) | |
599 | res = -1; | |
600 | ||
601 | if (res) { | |
602 | error(opts->action == REPLAY_REVERT | |
603 | ? _("could not revert %s... %s") | |
604 | : _("could not apply %s... %s"), | |
605 | find_unique_abbrev(commit->object.oid.hash, DEFAULT_ABBREV), | |
606 | msg.subject); | |
607 | print_advice(res == 1, opts); | |
608 | rerere(opts->allow_rerere_auto); | |
609 | goto leave; | |
610 | } | |
611 | ||
612 | allow = allow_empty(opts, commit); | |
613 | if (allow < 0) { | |
614 | res = allow; | |
615 | goto leave; | |
616 | } | |
617 | if (!opts->no_commit) | |
618 | res = run_git_commit(git_path_merge_msg(), opts, allow); | |
619 | ||
620 | leave: | |
621 | free_message(commit, &msg); | |
622 | ||
623 | return res; | |
624 | } | |
625 | ||
626 | static void prepare_revs(struct replay_opts *opts) | |
627 | { | |
628 | /* | |
629 | * picking (but not reverting) ranges (but not individual revisions) | |
630 | * should be done in reverse | |
631 | */ | |
632 | if (opts->action == REPLAY_PICK && !opts->revs->no_walk) | |
633 | opts->revs->reverse ^= 1; | |
634 | ||
635 | if (prepare_revision_walk(opts->revs)) | |
636 | die(_("revision walk setup failed")); | |
637 | ||
638 | if (!opts->revs->commits) | |
639 | die(_("empty commit set passed")); | |
640 | } | |
641 | ||
642 | static void read_and_refresh_cache(struct replay_opts *opts) | |
643 | { | |
644 | static struct lock_file index_lock; | |
645 | int index_fd = hold_locked_index(&index_lock, 0); | |
646 | if (read_index_preload(&the_index, NULL) < 0) | |
647 | die(_("git %s: failed to read the index"), action_name(opts)); | |
648 | refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, NULL, NULL, NULL); | |
649 | if (the_index.cache_changed && index_fd >= 0) { | |
650 | if (write_locked_index(&the_index, &index_lock, COMMIT_LOCK)) | |
651 | die(_("git %s: failed to refresh the index"), action_name(opts)); | |
652 | } | |
653 | rollback_lock_file(&index_lock); | |
654 | } | |
655 | ||
656 | static int format_todo(struct strbuf *buf, struct commit_list *todo_list, | |
657 | struct replay_opts *opts) | |
658 | { | |
659 | struct commit_list *cur = NULL; | |
660 | const char *sha1_abbrev = NULL; | |
661 | const char *action_str = opts->action == REPLAY_REVERT ? "revert" : "pick"; | |
662 | const char *subject; | |
663 | int subject_len; | |
664 | ||
665 | for (cur = todo_list; cur; cur = cur->next) { | |
666 | const char *commit_buffer = get_commit_buffer(cur->item, NULL); | |
667 | sha1_abbrev = find_unique_abbrev(cur->item->object.oid.hash, DEFAULT_ABBREV); | |
668 | subject_len = find_commit_subject(commit_buffer, &subject); | |
669 | strbuf_addf(buf, "%s %s %.*s\n", action_str, sha1_abbrev, | |
670 | subject_len, subject); | |
671 | unuse_commit_buffer(cur->item, commit_buffer); | |
672 | } | |
673 | return 0; | |
674 | } | |
675 | ||
676 | static struct commit *parse_insn_line(char *bol, char *eol, struct replay_opts *opts) | |
677 | { | |
678 | unsigned char commit_sha1[20]; | |
679 | enum replay_action action; | |
680 | char *end_of_object_name; | |
681 | int saved, status, padding; | |
682 | ||
683 | if (starts_with(bol, "pick")) { | |
684 | action = REPLAY_PICK; | |
685 | bol += strlen("pick"); | |
686 | } else if (starts_with(bol, "revert")) { | |
687 | action = REPLAY_REVERT; | |
688 | bol += strlen("revert"); | |
689 | } else | |
690 | return NULL; | |
691 | ||
692 | /* Eat up extra spaces/ tabs before object name */ | |
693 | padding = strspn(bol, " \t"); | |
694 | if (!padding) | |
695 | return NULL; | |
696 | bol += padding; | |
697 | ||
698 | end_of_object_name = bol + strcspn(bol, " \t\n"); | |
699 | saved = *end_of_object_name; | |
700 | *end_of_object_name = '\0'; | |
701 | status = get_sha1(bol, commit_sha1); | |
702 | *end_of_object_name = saved; | |
703 | ||
704 | /* | |
705 | * Verify that the action matches up with the one in | |
706 | * opts; we don't support arbitrary instructions | |
707 | */ | |
708 | if (action != opts->action) { | |
709 | if (action == REPLAY_REVERT) | |
710 | error((opts->action == REPLAY_REVERT) | |
711 | ? _("Cannot revert during another revert.") | |
712 | : _("Cannot revert during a cherry-pick.")); | |
713 | else | |
714 | error((opts->action == REPLAY_REVERT) | |
715 | ? _("Cannot cherry-pick during a revert.") | |
716 | : _("Cannot cherry-pick during another cherry-pick.")); | |
717 | return NULL; | |
718 | } | |
719 | ||
720 | if (status < 0) | |
721 | return NULL; | |
722 | ||
723 | return lookup_commit_reference(commit_sha1); | |
724 | } | |
725 | ||
726 | static int parse_insn_buffer(char *buf, struct commit_list **todo_list, | |
727 | struct replay_opts *opts) | |
728 | { | |
729 | struct commit_list **next = todo_list; | |
730 | struct commit *commit; | |
731 | char *p = buf; | |
732 | int i; | |
733 | ||
734 | for (i = 1; *p; i++) { | |
735 | char *eol = strchrnul(p, '\n'); | |
736 | commit = parse_insn_line(p, eol, opts); | |
737 | if (!commit) | |
738 | return error(_("Could not parse line %d."), i); | |
739 | next = commit_list_append(commit, next); | |
740 | p = *eol ? eol + 1 : eol; | |
741 | } | |
742 | if (!*todo_list) | |
743 | return error(_("No commits parsed.")); | |
744 | return 0; | |
745 | } | |
746 | ||
747 | static void read_populate_todo(struct commit_list **todo_list, | |
748 | struct replay_opts *opts) | |
749 | { | |
750 | struct strbuf buf = STRBUF_INIT; | |
751 | int fd, res; | |
752 | ||
753 | fd = open(git_path_todo_file(), O_RDONLY); | |
754 | if (fd < 0) | |
755 | die_errno(_("Could not open %s"), git_path_todo_file()); | |
756 | if (strbuf_read(&buf, fd, 0) < 0) { | |
757 | close(fd); | |
758 | strbuf_release(&buf); | |
759 | die(_("Could not read %s."), git_path_todo_file()); | |
760 | } | |
761 | close(fd); | |
762 | ||
763 | res = parse_insn_buffer(buf.buf, todo_list, opts); | |
764 | strbuf_release(&buf); | |
765 | if (res) | |
766 | die(_("Unusable instruction sheet: %s"), git_path_todo_file()); | |
767 | } | |
768 | ||
769 | static int populate_opts_cb(const char *key, const char *value, void *data) | |
770 | { | |
771 | struct replay_opts *opts = data; | |
772 | int error_flag = 1; | |
773 | ||
774 | if (!value) | |
775 | error_flag = 0; | |
776 | else if (!strcmp(key, "options.no-commit")) | |
777 | opts->no_commit = git_config_bool_or_int(key, value, &error_flag); | |
778 | else if (!strcmp(key, "options.edit")) | |
779 | opts->edit = git_config_bool_or_int(key, value, &error_flag); | |
780 | else if (!strcmp(key, "options.signoff")) | |
781 | opts->signoff = git_config_bool_or_int(key, value, &error_flag); | |
782 | else if (!strcmp(key, "options.record-origin")) | |
783 | opts->record_origin = git_config_bool_or_int(key, value, &error_flag); | |
784 | else if (!strcmp(key, "options.allow-ff")) | |
785 | opts->allow_ff = git_config_bool_or_int(key, value, &error_flag); | |
786 | else if (!strcmp(key, "options.mainline")) | |
787 | opts->mainline = git_config_int(key, value); | |
788 | else if (!strcmp(key, "options.strategy")) | |
789 | git_config_string(&opts->strategy, key, value); | |
790 | else if (!strcmp(key, "options.gpg-sign")) | |
791 | git_config_string(&opts->gpg_sign, key, value); | |
792 | else if (!strcmp(key, "options.strategy-option")) { | |
793 | ALLOC_GROW(opts->xopts, opts->xopts_nr + 1, opts->xopts_alloc); | |
794 | opts->xopts[opts->xopts_nr++] = xstrdup(value); | |
795 | } else | |
796 | return error(_("Invalid key: %s"), key); | |
797 | ||
798 | if (!error_flag) | |
799 | return error(_("Invalid value for %s: %s"), key, value); | |
800 | ||
801 | return 0; | |
802 | } | |
803 | ||
804 | static void read_populate_opts(struct replay_opts **opts_ptr) | |
805 | { | |
806 | if (!file_exists(git_path_opts_file())) | |
807 | return; | |
808 | if (git_config_from_file(populate_opts_cb, git_path_opts_file(), *opts_ptr) < 0) | |
809 | die(_("Malformed options sheet: %s"), git_path_opts_file()); | |
810 | } | |
811 | ||
812 | static void walk_revs_populate_todo(struct commit_list **todo_list, | |
813 | struct replay_opts *opts) | |
814 | { | |
815 | struct commit *commit; | |
816 | struct commit_list **next; | |
817 | ||
818 | prepare_revs(opts); | |
819 | ||
820 | next = todo_list; | |
821 | while ((commit = get_revision(opts->revs))) | |
822 | next = commit_list_append(commit, next); | |
823 | } | |
824 | ||
825 | static int create_seq_dir(void) | |
826 | { | |
827 | if (file_exists(git_path_seq_dir())) { | |
828 | error(_("a cherry-pick or revert is already in progress")); | |
829 | advise(_("try \"git cherry-pick (--continue | --quit | --abort)\"")); | |
830 | return -1; | |
831 | } | |
832 | else if (mkdir(git_path_seq_dir(), 0777) < 0) | |
833 | die_errno(_("Could not create sequencer directory %s"), | |
834 | git_path_seq_dir()); | |
835 | return 0; | |
836 | } | |
837 | ||
838 | static void save_head(const char *head) | |
839 | { | |
840 | static struct lock_file head_lock; | |
841 | struct strbuf buf = STRBUF_INIT; | |
842 | int fd; | |
843 | ||
844 | fd = hold_lock_file_for_update(&head_lock, git_path_head_file(), LOCK_DIE_ON_ERROR); | |
845 | strbuf_addf(&buf, "%s\n", head); | |
846 | if (write_in_full(fd, buf.buf, buf.len) < 0) | |
847 | die_errno(_("Could not write to %s"), git_path_head_file()); | |
848 | if (commit_lock_file(&head_lock) < 0) | |
849 | die(_("Error wrapping up %s."), git_path_head_file()); | |
850 | } | |
851 | ||
852 | static int reset_for_rollback(const unsigned char *sha1) | |
853 | { | |
854 | const char *argv[4]; /* reset --merge <arg> + NULL */ | |
855 | argv[0] = "reset"; | |
856 | argv[1] = "--merge"; | |
857 | argv[2] = sha1_to_hex(sha1); | |
858 | argv[3] = NULL; | |
859 | return run_command_v_opt(argv, RUN_GIT_CMD); | |
860 | } | |
861 | ||
862 | static int rollback_single_pick(void) | |
863 | { | |
864 | unsigned char head_sha1[20]; | |
865 | ||
866 | if (!file_exists(git_path_cherry_pick_head()) && | |
867 | !file_exists(git_path_revert_head())) | |
868 | return error(_("no cherry-pick or revert in progress")); | |
869 | if (read_ref_full("HEAD", 0, head_sha1, NULL)) | |
870 | return error(_("cannot resolve HEAD")); | |
871 | if (is_null_sha1(head_sha1)) | |
872 | return error(_("cannot abort from a branch yet to be born")); | |
873 | return reset_for_rollback(head_sha1); | |
874 | } | |
875 | ||
876 | static int sequencer_rollback(struct replay_opts *opts) | |
877 | { | |
878 | FILE *f; | |
879 | unsigned char sha1[20]; | |
880 | struct strbuf buf = STRBUF_INIT; | |
881 | ||
882 | f = fopen(git_path_head_file(), "r"); | |
883 | if (!f && errno == ENOENT) { | |
884 | /* | |
885 | * There is no multiple-cherry-pick in progress. | |
886 | * If CHERRY_PICK_HEAD or REVERT_HEAD indicates | |
887 | * a single-cherry-pick in progress, abort that. | |
888 | */ | |
889 | return rollback_single_pick(); | |
890 | } | |
891 | if (!f) | |
892 | return error_errno(_("cannot open %s"), git_path_head_file()); | |
893 | if (strbuf_getline_lf(&buf, f)) { | |
894 | error(_("cannot read %s: %s"), git_path_head_file(), | |
895 | ferror(f) ? strerror(errno) : _("unexpected end of file")); | |
896 | fclose(f); | |
897 | goto fail; | |
898 | } | |
899 | fclose(f); | |
900 | if (get_sha1_hex(buf.buf, sha1) || buf.buf[40] != '\0') { | |
901 | error(_("stored pre-cherry-pick HEAD file '%s' is corrupt"), | |
902 | git_path_head_file()); | |
903 | goto fail; | |
904 | } | |
905 | if (is_null_sha1(sha1)) { | |
906 | error(_("cannot abort from a branch yet to be born")); | |
907 | goto fail; | |
908 | } | |
909 | if (reset_for_rollback(sha1)) | |
910 | goto fail; | |
911 | remove_sequencer_state(); | |
912 | strbuf_release(&buf); | |
913 | return 0; | |
914 | fail: | |
915 | strbuf_release(&buf); | |
916 | return -1; | |
917 | } | |
918 | ||
919 | static void save_todo(struct commit_list *todo_list, struct replay_opts *opts) | |
920 | { | |
921 | static struct lock_file todo_lock; | |
922 | struct strbuf buf = STRBUF_INIT; | |
923 | int fd; | |
924 | ||
925 | fd = hold_lock_file_for_update(&todo_lock, git_path_todo_file(), LOCK_DIE_ON_ERROR); | |
926 | if (format_todo(&buf, todo_list, opts) < 0) | |
927 | die(_("Could not format %s."), git_path_todo_file()); | |
928 | if (write_in_full(fd, buf.buf, buf.len) < 0) { | |
929 | strbuf_release(&buf); | |
930 | die_errno(_("Could not write to %s"), git_path_todo_file()); | |
931 | } | |
932 | if (commit_lock_file(&todo_lock) < 0) { | |
933 | strbuf_release(&buf); | |
934 | die(_("Error wrapping up %s."), git_path_todo_file()); | |
935 | } | |
936 | strbuf_release(&buf); | |
937 | } | |
938 | ||
939 | static void save_opts(struct replay_opts *opts) | |
940 | { | |
941 | const char *opts_file = git_path_opts_file(); | |
942 | ||
943 | if (opts->no_commit) | |
944 | git_config_set_in_file(opts_file, "options.no-commit", "true"); | |
945 | if (opts->edit) | |
946 | git_config_set_in_file(opts_file, "options.edit", "true"); | |
947 | if (opts->signoff) | |
948 | git_config_set_in_file(opts_file, "options.signoff", "true"); | |
949 | if (opts->record_origin) | |
950 | git_config_set_in_file(opts_file, "options.record-origin", "true"); | |
951 | if (opts->allow_ff) | |
952 | git_config_set_in_file(opts_file, "options.allow-ff", "true"); | |
953 | if (opts->mainline) { | |
954 | struct strbuf buf = STRBUF_INIT; | |
955 | strbuf_addf(&buf, "%d", opts->mainline); | |
956 | git_config_set_in_file(opts_file, "options.mainline", buf.buf); | |
957 | strbuf_release(&buf); | |
958 | } | |
959 | if (opts->strategy) | |
960 | git_config_set_in_file(opts_file, "options.strategy", opts->strategy); | |
961 | if (opts->gpg_sign) | |
962 | git_config_set_in_file(opts_file, "options.gpg-sign", opts->gpg_sign); | |
963 | if (opts->xopts) { | |
964 | int i; | |
965 | for (i = 0; i < opts->xopts_nr; i++) | |
966 | git_config_set_multivar_in_file(opts_file, | |
967 | "options.strategy-option", | |
968 | opts->xopts[i], "^$", 0); | |
969 | } | |
970 | } | |
971 | ||
972 | static int pick_commits(struct commit_list *todo_list, struct replay_opts *opts) | |
973 | { | |
974 | struct commit_list *cur; | |
975 | int res; | |
976 | ||
977 | setenv(GIT_REFLOG_ACTION, action_name(opts), 0); | |
978 | if (opts->allow_ff) | |
979 | assert(!(opts->signoff || opts->no_commit || | |
980 | opts->record_origin || opts->edit)); | |
981 | read_and_refresh_cache(opts); | |
982 | ||
983 | for (cur = todo_list; cur; cur = cur->next) { | |
984 | save_todo(cur, opts); | |
985 | res = do_pick_commit(cur->item, opts); | |
986 | if (res) | |
987 | return res; | |
988 | } | |
989 | ||
990 | /* | |
991 | * Sequence of picks finished successfully; cleanup by | |
992 | * removing the .git/sequencer directory | |
993 | */ | |
994 | remove_sequencer_state(); | |
995 | return 0; | |
996 | } | |
997 | ||
998 | static int continue_single_pick(void) | |
999 | { | |
1000 | const char *argv[] = { "commit", NULL }; | |
1001 | ||
1002 | if (!file_exists(git_path_cherry_pick_head()) && | |
1003 | !file_exists(git_path_revert_head())) | |
1004 | return error(_("no cherry-pick or revert in progress")); | |
1005 | return run_command_v_opt(argv, RUN_GIT_CMD); | |
1006 | } | |
1007 | ||
1008 | static int sequencer_continue(struct replay_opts *opts) | |
1009 | { | |
1010 | struct commit_list *todo_list = NULL; | |
1011 | ||
1012 | if (!file_exists(git_path_todo_file())) | |
1013 | return continue_single_pick(); | |
1014 | read_populate_opts(&opts); | |
1015 | read_populate_todo(&todo_list, opts); | |
1016 | ||
1017 | /* Verify that the conflict has been resolved */ | |
1018 | if (file_exists(git_path_cherry_pick_head()) || | |
1019 | file_exists(git_path_revert_head())) { | |
1020 | int ret = continue_single_pick(); | |
1021 | if (ret) | |
1022 | return ret; | |
1023 | } | |
1024 | if (index_differs_from("HEAD", 0)) | |
1025 | return error_dirty_index(opts); | |
1026 | todo_list = todo_list->next; | |
1027 | return pick_commits(todo_list, opts); | |
1028 | } | |
1029 | ||
1030 | static int single_pick(struct commit *cmit, struct replay_opts *opts) | |
1031 | { | |
1032 | setenv(GIT_REFLOG_ACTION, action_name(opts), 0); | |
1033 | return do_pick_commit(cmit, opts); | |
1034 | } | |
1035 | ||
1036 | int sequencer_pick_revisions(struct replay_opts *opts) | |
1037 | { | |
1038 | struct commit_list *todo_list = NULL; | |
1039 | unsigned char sha1[20]; | |
1040 | int i; | |
1041 | ||
1042 | if (opts->subcommand == REPLAY_NONE) | |
1043 | assert(opts->revs); | |
1044 | ||
1045 | read_and_refresh_cache(opts); | |
1046 | ||
1047 | /* | |
1048 | * Decide what to do depending on the arguments; a fresh | |
1049 | * cherry-pick should be handled differently from an existing | |
1050 | * one that is being continued | |
1051 | */ | |
1052 | if (opts->subcommand == REPLAY_REMOVE_STATE) { | |
1053 | remove_sequencer_state(); | |
1054 | return 0; | |
1055 | } | |
1056 | if (opts->subcommand == REPLAY_ROLLBACK) | |
1057 | return sequencer_rollback(opts); | |
1058 | if (opts->subcommand == REPLAY_CONTINUE) | |
1059 | return sequencer_continue(opts); | |
1060 | ||
1061 | for (i = 0; i < opts->revs->pending.nr; i++) { | |
1062 | unsigned char sha1[20]; | |
1063 | const char *name = opts->revs->pending.objects[i].name; | |
1064 | ||
1065 | /* This happens when using --stdin. */ | |
1066 | if (!strlen(name)) | |
1067 | continue; | |
1068 | ||
1069 | if (!get_sha1(name, sha1)) { | |
1070 | if (!lookup_commit_reference_gently(sha1, 1)) { | |
1071 | enum object_type type = sha1_object_info(sha1, NULL); | |
1072 | return error(_("%s: can't cherry-pick a %s"), | |
1073 | name, typename(type)); | |
1074 | } | |
1075 | } else | |
1076 | return error(_("%s: bad revision"), name); | |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | * If we were called as "git cherry-pick <commit>", just | |
1081 | * cherry-pick/revert it, set CHERRY_PICK_HEAD / | |
1082 | * REVERT_HEAD, and don't touch the sequencer state. | |
1083 | * This means it is possible to cherry-pick in the middle | |
1084 | * of a cherry-pick sequence. | |
1085 | */ | |
1086 | if (opts->revs->cmdline.nr == 1 && | |
1087 | opts->revs->cmdline.rev->whence == REV_CMD_REV && | |
1088 | opts->revs->no_walk && | |
1089 | !opts->revs->cmdline.rev->flags) { | |
1090 | struct commit *cmit; | |
1091 | if (prepare_revision_walk(opts->revs)) | |
1092 | return error(_("revision walk setup failed")); | |
1093 | cmit = get_revision(opts->revs); | |
1094 | if (!cmit || get_revision(opts->revs)) | |
1095 | return error("BUG: expected exactly one commit from walk"); | |
1096 | return single_pick(cmit, opts); | |
1097 | } | |
1098 | ||
1099 | /* | |
1100 | * Start a new cherry-pick/ revert sequence; but | |
1101 | * first, make sure that an existing one isn't in | |
1102 | * progress | |
1103 | */ | |
1104 | ||
1105 | walk_revs_populate_todo(&todo_list, opts); | |
1106 | if (create_seq_dir() < 0) | |
1107 | return -1; | |
1108 | if (get_sha1("HEAD", sha1) && (opts->action == REPLAY_REVERT)) | |
1109 | return error(_("Can't revert as initial commit")); | |
1110 | save_head(sha1_to_hex(sha1)); | |
1111 | save_opts(opts); | |
1112 | return pick_commits(todo_list, opts); | |
1113 | } | |
1114 | ||
1115 | void append_signoff(struct strbuf *msgbuf, int ignore_footer, unsigned flag) | |
1116 | { | |
1117 | unsigned no_dup_sob = flag & APPEND_SIGNOFF_DEDUP; | |
1118 | struct strbuf sob = STRBUF_INIT; | |
1119 | int has_footer; | |
1120 | ||
1121 | strbuf_addstr(&sob, sign_off_header); | |
1122 | strbuf_addstr(&sob, fmt_name(getenv("GIT_COMMITTER_NAME"), | |
1123 | getenv("GIT_COMMITTER_EMAIL"))); | |
1124 | strbuf_addch(&sob, '\n'); | |
1125 | ||
1126 | /* | |
1127 | * If the whole message buffer is equal to the sob, pretend that we | |
1128 | * found a conforming footer with a matching sob | |
1129 | */ | |
1130 | if (msgbuf->len - ignore_footer == sob.len && | |
1131 | !strncmp(msgbuf->buf, sob.buf, sob.len)) | |
1132 | has_footer = 3; | |
1133 | else | |
1134 | has_footer = has_conforming_footer(msgbuf, &sob, ignore_footer); | |
1135 | ||
1136 | if (!has_footer) { | |
1137 | const char *append_newlines = NULL; | |
1138 | size_t len = msgbuf->len - ignore_footer; | |
1139 | ||
1140 | if (!len) { | |
1141 | /* | |
1142 | * The buffer is completely empty. Leave foom for | |
1143 | * the title and body to be filled in by the user. | |
1144 | */ | |
1145 | append_newlines = "\n\n"; | |
1146 | } else if (msgbuf->buf[len - 1] != '\n') { | |
1147 | /* | |
1148 | * Incomplete line. Complete the line and add a | |
1149 | * blank one so that there is an empty line between | |
1150 | * the message body and the sob. | |
1151 | */ | |
1152 | append_newlines = "\n\n"; | |
1153 | } else if (len == 1) { | |
1154 | /* | |
1155 | * Buffer contains a single newline. Add another | |
1156 | * so that we leave room for the title and body. | |
1157 | */ | |
1158 | append_newlines = "\n"; | |
1159 | } else if (msgbuf->buf[len - 2] != '\n') { | |
1160 | /* | |
1161 | * Buffer ends with a single newline. Add another | |
1162 | * so that there is an empty line between the message | |
1163 | * body and the sob. | |
1164 | */ | |
1165 | append_newlines = "\n"; | |
1166 | } /* else, the buffer already ends with two newlines. */ | |
1167 | ||
1168 | if (append_newlines) | |
1169 | strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0, | |
1170 | append_newlines, strlen(append_newlines)); | |
1171 | } | |
1172 | ||
1173 | if (has_footer != 3 && (!no_dup_sob || has_footer != 2)) | |
1174 | strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0, | |
1175 | sob.buf, sob.len); | |
1176 | ||
1177 | strbuf_release(&sob); | |
1178 | } |