]>
Commit | Line | Data |
---|---|---|
26ae337b | 1 | #include "cache.h" |
697cc8ef | 2 | #include "lockfile.h" |
26ae337b | 3 | #include "sequencer.h" |
26ae337b | 4 | #include "dir.h" |
043a4492 RR |
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" | |
b27cfb0d | 17 | #include "argv-array.h" |
043a4492 RR |
18 | |
19 | #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION" | |
26ae337b | 20 | |
5ed75e2a | 21 | const char sign_off_header[] = "Signed-off-by: "; |
cd650a4e | 22 | static const char cherry_picked_prefix[] = "(cherry picked from commit "; |
5ed75e2a | 23 | |
8a2a0f53 JS |
24 | GIT_PATH_FUNC(git_path_seq_dir, "sequencer") |
25 | ||
26 | static GIT_PATH_FUNC(git_path_todo_file, "sequencer/todo") | |
27 | static GIT_PATH_FUNC(git_path_opts_file, "sequencer/opts") | |
28 | static GIT_PATH_FUNC(git_path_head_file, "sequencer/head") | |
f932729c | 29 | |
b5a67045 JS |
30 | /* |
31 | * A script to set the GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL, and | |
32 | * GIT_AUTHOR_DATE that will be used for the commit that is currently | |
33 | * being rebased. | |
34 | */ | |
35 | static GIT_PATH_FUNC(rebase_path_author_script, "rebase-merge/author-script") | |
36 | ||
37 | /* We will introduce the 'interactive rebase' mode later */ | |
38 | static inline int is_rebase_i(const struct replay_opts *opts) | |
39 | { | |
40 | return 0; | |
41 | } | |
42 | ||
285abf56 JS |
43 | static const char *get_dir(const struct replay_opts *opts) |
44 | { | |
45 | return git_path_seq_dir(); | |
46 | } | |
47 | ||
c0246501 JS |
48 | static const char *get_todo_path(const struct replay_opts *opts) |
49 | { | |
50 | return git_path_todo_file(); | |
51 | } | |
52 | ||
b971e04f BC |
53 | static int is_rfc2822_line(const char *buf, int len) |
54 | { | |
55 | int i; | |
56 | ||
57 | for (i = 0; i < len; i++) { | |
58 | int ch = buf[i]; | |
59 | if (ch == ':') | |
60 | return 1; | |
61 | if (!isalnum(ch) && ch != '-') | |
62 | break; | |
63 | } | |
64 | ||
65 | return 0; | |
66 | } | |
67 | ||
68 | static int is_cherry_picked_from_line(const char *buf, int len) | |
69 | { | |
70 | /* | |
71 | * We only care that it looks roughly like (cherry picked from ...) | |
72 | */ | |
73 | return len > strlen(cherry_picked_prefix) + 1 && | |
59556548 | 74 | starts_with(buf, cherry_picked_prefix) && buf[len - 1] == ')'; |
b971e04f BC |
75 | } |
76 | ||
bab4d109 BC |
77 | /* |
78 | * Returns 0 for non-conforming footer | |
79 | * Returns 1 for conforming footer | |
80 | * Returns 2 when sob exists within conforming footer | |
81 | * Returns 3 when sob exists within conforming footer as last entry | |
82 | */ | |
83 | static int has_conforming_footer(struct strbuf *sb, struct strbuf *sob, | |
84 | int ignore_footer) | |
b971e04f BC |
85 | { |
86 | char prev; | |
87 | int i, k; | |
88 | int len = sb->len - ignore_footer; | |
89 | const char *buf = sb->buf; | |
bab4d109 | 90 | int found_sob = 0; |
b971e04f BC |
91 | |
92 | /* footer must end with newline */ | |
93 | if (!len || buf[len - 1] != '\n') | |
94 | return 0; | |
95 | ||
96 | prev = '\0'; | |
97 | for (i = len - 1; i > 0; i--) { | |
98 | char ch = buf[i]; | |
99 | if (prev == '\n' && ch == '\n') /* paragraph break */ | |
100 | break; | |
101 | prev = ch; | |
102 | } | |
103 | ||
104 | /* require at least one blank line */ | |
105 | if (prev != '\n' || buf[i] != '\n') | |
106 | return 0; | |
107 | ||
108 | /* advance to start of last paragraph */ | |
109 | while (i < len - 1 && buf[i] == '\n') | |
110 | i++; | |
111 | ||
112 | for (; i < len; i = k) { | |
bab4d109 BC |
113 | int found_rfc2822; |
114 | ||
b971e04f BC |
115 | for (k = i; k < len && buf[k] != '\n'; k++) |
116 | ; /* do nothing */ | |
117 | k++; | |
118 | ||
bab4d109 BC |
119 | found_rfc2822 = is_rfc2822_line(buf + i, k - i - 1); |
120 | if (found_rfc2822 && sob && | |
121 | !strncmp(buf + i, sob->buf, sob->len)) | |
122 | found_sob = k; | |
123 | ||
124 | if (!(found_rfc2822 || | |
125 | is_cherry_picked_from_line(buf + i, k - i - 1))) | |
b971e04f BC |
126 | return 0; |
127 | } | |
bab4d109 BC |
128 | if (found_sob == i) |
129 | return 3; | |
130 | if (found_sob) | |
131 | return 2; | |
b971e04f BC |
132 | return 1; |
133 | } | |
5ed75e2a | 134 | |
2863584f | 135 | int sequencer_remove_state(struct replay_opts *opts) |
26ae337b | 136 | { |
285abf56 | 137 | struct strbuf dir = STRBUF_INIT; |
03a4e260 JS |
138 | int i; |
139 | ||
140 | free(opts->gpg_sign); | |
141 | free(opts->strategy); | |
142 | for (i = 0; i < opts->xopts_nr; i++) | |
143 | free(opts->xopts[i]); | |
144 | free(opts->xopts); | |
26ae337b | 145 | |
285abf56 JS |
146 | strbuf_addf(&dir, "%s", get_dir(opts)); |
147 | remove_dir_recursively(&dir, 0); | |
148 | strbuf_release(&dir); | |
2863584f JS |
149 | |
150 | return 0; | |
26ae337b | 151 | } |
043a4492 RR |
152 | |
153 | static const char *action_name(const struct replay_opts *opts) | |
154 | { | |
155 | return opts->action == REPLAY_REVERT ? "revert" : "cherry-pick"; | |
156 | } | |
157 | ||
043a4492 RR |
158 | struct commit_message { |
159 | char *parent_label; | |
7b35eaf8 JK |
160 | char *label; |
161 | char *subject; | |
043a4492 RR |
162 | const char *message; |
163 | }; | |
164 | ||
39755964 JS |
165 | static const char *short_commit_name(struct commit *commit) |
166 | { | |
167 | return find_unique_abbrev(commit->object.oid.hash, DEFAULT_ABBREV); | |
168 | } | |
169 | ||
043a4492 RR |
170 | static int get_message(struct commit *commit, struct commit_message *out) |
171 | { | |
043a4492 | 172 | const char *abbrev, *subject; |
7b35eaf8 | 173 | int subject_len; |
043a4492 | 174 | |
7b35eaf8 | 175 | out->message = logmsg_reencode(commit, NULL, get_commit_output_encoding()); |
39755964 | 176 | abbrev = short_commit_name(commit); |
043a4492 RR |
177 | |
178 | subject_len = find_commit_subject(out->message, &subject); | |
179 | ||
7b35eaf8 JK |
180 | out->subject = xmemdupz(subject, subject_len); |
181 | out->label = xstrfmt("%s... %s", abbrev, out->subject); | |
182 | out->parent_label = xstrfmt("parent of %s", out->label); | |
183 | ||
043a4492 RR |
184 | return 0; |
185 | } | |
186 | ||
d74a4e57 | 187 | static void free_message(struct commit *commit, struct commit_message *msg) |
043a4492 RR |
188 | { |
189 | free(msg->parent_label); | |
7b35eaf8 JK |
190 | free(msg->label); |
191 | free(msg->subject); | |
b66103c3 | 192 | unuse_commit_buffer(commit, msg->message); |
043a4492 RR |
193 | } |
194 | ||
ed727b19 | 195 | static void print_advice(int show_hint, struct replay_opts *opts) |
043a4492 RR |
196 | { |
197 | char *msg = getenv("GIT_CHERRY_PICK_HELP"); | |
198 | ||
199 | if (msg) { | |
200 | fprintf(stderr, "%s\n", msg); | |
201 | /* | |
41ccfdd9 | 202 | * A conflict has occurred but the porcelain |
043a4492 RR |
203 | * (typically rebase --interactive) wants to take care |
204 | * of the commit itself so remove CHERRY_PICK_HEAD | |
205 | */ | |
f932729c | 206 | unlink(git_path_cherry_pick_head()); |
043a4492 RR |
207 | return; |
208 | } | |
209 | ||
ed727b19 PH |
210 | if (show_hint) { |
211 | if (opts->no_commit) | |
212 | advise(_("after resolving the conflicts, mark the corrected paths\n" | |
213 | "with 'git add <paths>' or 'git rm <paths>'")); | |
214 | else | |
215 | advise(_("after resolving the conflicts, mark the corrected paths\n" | |
216 | "with 'git add <paths>' or 'git rm <paths>'\n" | |
217 | "and commit the result with 'git commit'")); | |
218 | } | |
043a4492 RR |
219 | } |
220 | ||
4ef3d8f0 | 221 | static int write_message(struct strbuf *msgbuf, const char *filename) |
043a4492 RR |
222 | { |
223 | static struct lock_file msg_file; | |
224 | ||
4ef3d8f0 JS |
225 | int msg_fd = hold_lock_file_for_update(&msg_file, filename, 0); |
226 | if (msg_fd < 0) | |
227 | return error_errno(_("Could not lock '%s'"), filename); | |
043a4492 | 228 | if (write_in_full(msg_fd, msgbuf->buf, msgbuf->len) < 0) |
4ef3d8f0 | 229 | return error_errno(_("Could not write to %s"), filename); |
043a4492 RR |
230 | strbuf_release(msgbuf); |
231 | if (commit_lock_file(&msg_file) < 0) | |
4ef3d8f0 JS |
232 | return error(_("Error wrapping up %s."), filename); |
233 | ||
234 | return 0; | |
043a4492 RR |
235 | } |
236 | ||
1dfc84e9 JS |
237 | /* |
238 | * Reads a file that was presumably written by a shell script, i.e. with an | |
239 | * end-of-line marker that needs to be stripped. | |
240 | * | |
241 | * Note that only the last end-of-line marker is stripped, consistent with the | |
242 | * behavior of "$(cat path)" in a shell script. | |
243 | * | |
244 | * Returns 1 if the file was read, 0 if it could not be read or does not exist. | |
245 | */ | |
246 | static int read_oneliner(struct strbuf *buf, | |
247 | const char *path, int skip_if_empty) | |
248 | { | |
249 | int orig_len = buf->len; | |
250 | ||
251 | if (!file_exists(path)) | |
252 | return 0; | |
253 | ||
254 | if (strbuf_read_file(buf, path, 0) < 0) { | |
255 | warning_errno(_("could not read '%s'"), path); | |
256 | return 0; | |
257 | } | |
258 | ||
259 | if (buf->len > orig_len && buf->buf[buf->len - 1] == '\n') { | |
260 | if (--buf->len > orig_len && buf->buf[buf->len - 1] == '\r') | |
261 | --buf->len; | |
262 | buf->buf[buf->len] = '\0'; | |
263 | } | |
264 | ||
265 | if (skip_if_empty && buf->len == orig_len) | |
266 | return 0; | |
267 | ||
268 | return 1; | |
269 | } | |
270 | ||
043a4492 RR |
271 | static struct tree *empty_tree(void) |
272 | { | |
cba595bd | 273 | return lookup_tree(EMPTY_TREE_SHA1_BIN); |
043a4492 RR |
274 | } |
275 | ||
276 | static int error_dirty_index(struct replay_opts *opts) | |
277 | { | |
278 | if (read_cache_unmerged()) | |
279 | return error_resolve_conflict(action_name(opts)); | |
280 | ||
e635d5ce JS |
281 | error(_("Your local changes would be overwritten by %s."), |
282 | action_name(opts)); | |
043a4492 RR |
283 | |
284 | if (advice_commit_before_merge) | |
285 | advise(_("Commit your changes or stash them to proceed.")); | |
286 | return -1; | |
287 | } | |
288 | ||
334ae397 | 289 | static int fast_forward_to(const unsigned char *to, const unsigned char *from, |
eb4be1cb | 290 | int unborn, struct replay_opts *opts) |
043a4492 | 291 | { |
d668d16c | 292 | struct ref_transaction *transaction; |
eb4be1cb | 293 | struct strbuf sb = STRBUF_INIT; |
d668d16c | 294 | struct strbuf err = STRBUF_INIT; |
043a4492 RR |
295 | |
296 | read_cache(); | |
db699a8a | 297 | if (checkout_fast_forward(from, to, 1)) |
0e408fc3 | 298 | return -1; /* the callee should have complained already */ |
651ab9f5 | 299 | |
e8d7c390 | 300 | strbuf_addf(&sb, _("%s: fast-forward"), action_name(opts)); |
d668d16c RS |
301 | |
302 | transaction = ref_transaction_begin(&err); | |
303 | if (!transaction || | |
304 | ref_transaction_update(transaction, "HEAD", | |
305 | to, unborn ? null_sha1 : from, | |
1d147bdf | 306 | 0, sb.buf, &err) || |
db7516ab | 307 | ref_transaction_commit(transaction, &err)) { |
d668d16c RS |
308 | ref_transaction_free(transaction); |
309 | error("%s", err.buf); | |
310 | strbuf_release(&sb); | |
311 | strbuf_release(&err); | |
312 | return -1; | |
313 | } | |
651ab9f5 | 314 | |
eb4be1cb | 315 | strbuf_release(&sb); |
d668d16c RS |
316 | strbuf_release(&err); |
317 | ref_transaction_free(transaction); | |
318 | return 0; | |
043a4492 RR |
319 | } |
320 | ||
75c961b7 JH |
321 | void append_conflicts_hint(struct strbuf *msgbuf) |
322 | { | |
323 | int i; | |
324 | ||
261f315b JH |
325 | strbuf_addch(msgbuf, '\n'); |
326 | strbuf_commented_addf(msgbuf, "Conflicts:\n"); | |
75c961b7 JH |
327 | for (i = 0; i < active_nr;) { |
328 | const struct cache_entry *ce = active_cache[i++]; | |
329 | if (ce_stage(ce)) { | |
261f315b | 330 | strbuf_commented_addf(msgbuf, "\t%s\n", ce->name); |
75c961b7 JH |
331 | while (i < active_nr && !strcmp(ce->name, |
332 | active_cache[i]->name)) | |
333 | i++; | |
334 | } | |
335 | } | |
336 | } | |
337 | ||
043a4492 RR |
338 | static int do_recursive_merge(struct commit *base, struct commit *next, |
339 | const char *base_label, const char *next_label, | |
340 | unsigned char *head, struct strbuf *msgbuf, | |
341 | struct replay_opts *opts) | |
342 | { | |
343 | struct merge_options o; | |
344 | struct tree *result, *next_tree, *base_tree, *head_tree; | |
03b86647 | 345 | int clean; |
03a4e260 | 346 | char **xopt; |
043a4492 RR |
347 | static struct lock_file index_lock; |
348 | ||
03b86647 | 349 | hold_locked_index(&index_lock, 1); |
043a4492 RR |
350 | |
351 | read_cache(); | |
352 | ||
353 | init_merge_options(&o); | |
354 | o.ancestor = base ? base_label : "(empty tree)"; | |
355 | o.branch1 = "HEAD"; | |
356 | o.branch2 = next ? next_label : "(empty tree)"; | |
357 | ||
358 | head_tree = parse_tree_indirect(head); | |
359 | next_tree = next ? next->tree : empty_tree(); | |
360 | base_tree = base ? base->tree : empty_tree(); | |
361 | ||
362 | for (xopt = opts->xopts; xopt != opts->xopts + opts->xopts_nr; xopt++) | |
363 | parse_merge_opt(&o, *xopt); | |
364 | ||
365 | clean = merge_trees(&o, | |
366 | head_tree, | |
367 | next_tree, base_tree, &result); | |
548009c0 | 368 | strbuf_release(&o.obuf); |
f241ff0d JS |
369 | if (clean < 0) |
370 | return clean; | |
043a4492 RR |
371 | |
372 | if (active_cache_changed && | |
03b86647 | 373 | write_locked_index(&the_index, &index_lock, COMMIT_LOCK)) |
043a4492 | 374 | /* TRANSLATORS: %s will be "revert" or "cherry-pick" */ |
c527b55e JS |
375 | return error(_("%s: Unable to write new index file"), |
376 | action_name(opts)); | |
043a4492 RR |
377 | rollback_lock_file(&index_lock); |
378 | ||
5ed75e2a | 379 | if (opts->signoff) |
bab4d109 | 380 | append_signoff(msgbuf, 0, 0); |
5ed75e2a | 381 | |
75c961b7 JH |
382 | if (!clean) |
383 | append_conflicts_hint(msgbuf); | |
043a4492 RR |
384 | |
385 | return !clean; | |
386 | } | |
387 | ||
b27cfb0d NH |
388 | static int is_index_unchanged(void) |
389 | { | |
390 | unsigned char head_sha1[20]; | |
391 | struct commit *head_commit; | |
392 | ||
7695d118 | 393 | if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, head_sha1, NULL)) |
b27cfb0d NH |
394 | return error(_("Could not resolve HEAD commit\n")); |
395 | ||
396 | head_commit = lookup_commit(head_sha1); | |
4b580061 NH |
397 | |
398 | /* | |
399 | * If head_commit is NULL, check_commit, called from | |
400 | * lookup_commit, would have indicated that head_commit is not | |
401 | * a commit object already. parse_commit() will return failure | |
402 | * without further complaints in such a case. Otherwise, if | |
403 | * the commit is invalid, parse_commit() will complain. So | |
404 | * there is nothing for us to say here. Just return failure. | |
405 | */ | |
406 | if (parse_commit(head_commit)) | |
407 | return -1; | |
b27cfb0d NH |
408 | |
409 | if (!active_cache_tree) | |
410 | active_cache_tree = cache_tree(); | |
411 | ||
412 | if (!cache_tree_fully_valid(active_cache_tree)) | |
d0cfc3e8 | 413 | if (cache_tree_update(&the_index, 0)) |
b27cfb0d NH |
414 | return error(_("Unable to update cache tree\n")); |
415 | ||
ed1c9977 | 416 | return !hashcmp(active_cache_tree->sha1, head_commit->tree->object.oid.hash); |
b27cfb0d NH |
417 | } |
418 | ||
b5a67045 JS |
419 | /* |
420 | * Read the author-script file into an environment block, ready for use in | |
421 | * run_command(), that can be free()d afterwards. | |
422 | */ | |
423 | static char **read_author_script(void) | |
424 | { | |
425 | struct strbuf script = STRBUF_INIT; | |
426 | int i, count = 0; | |
427 | char *p, *p2, **env; | |
428 | size_t env_size; | |
429 | ||
430 | if (strbuf_read_file(&script, rebase_path_author_script(), 256) <= 0) | |
431 | return NULL; | |
432 | ||
433 | for (p = script.buf; *p; p++) | |
434 | if (skip_prefix(p, "'\\\\''", (const char **)&p2)) | |
435 | strbuf_splice(&script, p - script.buf, p2 - p, "'", 1); | |
436 | else if (*p == '\'') | |
437 | strbuf_splice(&script, p-- - script.buf, 1, "", 0); | |
438 | else if (*p == '\n') { | |
439 | *p = '\0'; | |
440 | count++; | |
441 | } | |
442 | ||
443 | env_size = (count + 1) * sizeof(*env); | |
444 | strbuf_grow(&script, env_size); | |
445 | memmove(script.buf + env_size, script.buf, script.len); | |
446 | p = script.buf + env_size; | |
447 | env = (char **)strbuf_detach(&script, NULL); | |
448 | ||
449 | for (i = 0; i < count; i++) { | |
450 | env[i] = p; | |
451 | p += strlen(p) + 1; | |
452 | } | |
453 | env[count] = NULL; | |
454 | ||
455 | return env; | |
456 | } | |
457 | ||
043a4492 RR |
458 | /* |
459 | * If we are cherry-pick, and if the merge did not result in | |
460 | * hand-editing, we will hit this commit and inherit the original | |
461 | * author date and name. | |
b5a67045 | 462 | * |
043a4492 RR |
463 | * If we are revert, or if our cherry-pick results in a hand merge, |
464 | * we had better say that the current user is responsible for that. | |
b5a67045 JS |
465 | * |
466 | * An exception is when run_git_commit() is called during an | |
467 | * interactive rebase: in that case, we will want to retain the | |
468 | * author metadata. | |
043a4492 | 469 | */ |
ac2b0e8f JH |
470 | static int run_git_commit(const char *defmsg, struct replay_opts *opts, |
471 | int allow_empty) | |
043a4492 | 472 | { |
b5a67045 | 473 | char **env = NULL; |
b27cfb0d NH |
474 | struct argv_array array; |
475 | int rc; | |
17d65f03 | 476 | const char *value; |
b27cfb0d | 477 | |
b5a67045 JS |
478 | if (is_rebase_i(opts)) { |
479 | env = read_author_script(); | |
480 | if (!env) | |
481 | return error("You have staged changes in your working " | |
482 | "tree. If these changes are meant to be\n" | |
483 | "squashed into the previous commit, run:\n\n" | |
484 | " git commit --amend $gpg_sign_opt_quoted\n\n" | |
485 | "If they are meant to go into a new commit, " | |
486 | "run:\n\n" | |
487 | " git commit $gpg_sign_opt_quoted\n\n" | |
488 | "In both cases, once you're done, continue " | |
489 | "with:\n\n" | |
490 | " git rebase --continue\n"); | |
491 | } | |
492 | ||
b27cfb0d NH |
493 | argv_array_init(&array); |
494 | argv_array_push(&array, "commit"); | |
495 | argv_array_push(&array, "-n"); | |
043a4492 | 496 | |
3bdd5522 JK |
497 | if (opts->gpg_sign) |
498 | argv_array_pushf(&array, "-S%s", opts->gpg_sign); | |
043a4492 | 499 | if (opts->signoff) |
b27cfb0d | 500 | argv_array_push(&array, "-s"); |
b5a67045 JS |
501 | if (defmsg) |
502 | argv_array_pushl(&array, "-F", defmsg, NULL); | |
503 | if (opts->edit) | |
504 | argv_array_push(&array, "-e"); | |
505 | else if (!opts->signoff && !opts->record_origin && | |
506 | git_config_get_value("commit.cleanup", &value)) | |
507 | argv_array_push(&array, "--cleanup=verbatim"); | |
b27cfb0d | 508 | |
ac2b0e8f | 509 | if (allow_empty) |
b27cfb0d | 510 | argv_array_push(&array, "--allow-empty"); |
df478b74 | 511 | |
4bee9584 CW |
512 | if (opts->allow_empty_message) |
513 | argv_array_push(&array, "--allow-empty-message"); | |
514 | ||
b5a67045 JS |
515 | rc = run_command_v_opt_cd_env(array.argv, RUN_GIT_CMD, NULL, |
516 | (const char *const *)env); | |
b27cfb0d | 517 | argv_array_clear(&array); |
b5a67045 JS |
518 | free(env); |
519 | ||
b27cfb0d NH |
520 | return rc; |
521 | } | |
522 | ||
523 | static int is_original_commit_empty(struct commit *commit) | |
524 | { | |
525 | const unsigned char *ptree_sha1; | |
526 | ||
527 | if (parse_commit(commit)) | |
528 | return error(_("Could not parse commit %s\n"), | |
f2fd0760 | 529 | oid_to_hex(&commit->object.oid)); |
b27cfb0d NH |
530 | if (commit->parents) { |
531 | struct commit *parent = commit->parents->item; | |
532 | if (parse_commit(parent)) | |
533 | return error(_("Could not parse parent commit %s\n"), | |
f2fd0760 | 534 | oid_to_hex(&parent->object.oid)); |
ed1c9977 | 535 | ptree_sha1 = parent->tree->object.oid.hash; |
b27cfb0d NH |
536 | } else { |
537 | ptree_sha1 = EMPTY_TREE_SHA1_BIN; /* commit is root */ | |
043a4492 | 538 | } |
043a4492 | 539 | |
ed1c9977 | 540 | return !hashcmp(ptree_sha1, commit->tree->object.oid.hash); |
043a4492 RR |
541 | } |
542 | ||
ac2b0e8f JH |
543 | /* |
544 | * Do we run "git commit" with "--allow-empty"? | |
545 | */ | |
546 | static int allow_empty(struct replay_opts *opts, struct commit *commit) | |
547 | { | |
548 | int index_unchanged, empty_commit; | |
549 | ||
550 | /* | |
551 | * Three cases: | |
552 | * | |
553 | * (1) we do not allow empty at all and error out. | |
554 | * | |
555 | * (2) we allow ones that were initially empty, but | |
556 | * forbid the ones that become empty; | |
557 | * | |
558 | * (3) we allow both. | |
559 | */ | |
560 | if (!opts->allow_empty) | |
561 | return 0; /* let "git commit" barf as necessary */ | |
562 | ||
563 | index_unchanged = is_index_unchanged(); | |
564 | if (index_unchanged < 0) | |
565 | return index_unchanged; | |
566 | if (!index_unchanged) | |
567 | return 0; /* we do not have to say --allow-empty */ | |
568 | ||
569 | if (opts->keep_redundant_commits) | |
570 | return 1; | |
571 | ||
572 | empty_commit = is_original_commit_empty(commit); | |
573 | if (empty_commit < 0) | |
574 | return empty_commit; | |
575 | if (!empty_commit) | |
576 | return 0; | |
577 | else | |
578 | return 1; | |
579 | } | |
580 | ||
004fefa7 JS |
581 | enum todo_command { |
582 | TODO_PICK = 0, | |
583 | TODO_REVERT | |
584 | }; | |
585 | ||
586 | static const char *todo_command_strings[] = { | |
587 | "pick", | |
588 | "revert" | |
589 | }; | |
590 | ||
591 | static const char *command_to_string(const enum todo_command command) | |
592 | { | |
593 | if (command < ARRAY_SIZE(todo_command_strings)) | |
594 | return todo_command_strings[command]; | |
595 | die("Unknown command: %d", command); | |
596 | } | |
597 | ||
598 | ||
599 | static int do_pick_commit(enum todo_command command, struct commit *commit, | |
600 | struct replay_opts *opts) | |
043a4492 RR |
601 | { |
602 | unsigned char head[20]; | |
603 | struct commit *base, *next, *parent; | |
604 | const char *base_label, *next_label; | |
d74a4e57 | 605 | struct commit_message msg = { NULL, NULL, NULL, NULL }; |
043a4492 | 606 | struct strbuf msgbuf = STRBUF_INIT; |
c8d1351d | 607 | int res, unborn = 0, allow; |
043a4492 RR |
608 | |
609 | if (opts->no_commit) { | |
610 | /* | |
611 | * We do not intend to commit immediately. We just want to | |
612 | * merge the differences in, so let's compute the tree | |
613 | * that represents the "current" state for merge-recursive | |
614 | * to work on. | |
615 | */ | |
616 | if (write_cache_as_tree(head, 0, NULL)) | |
f74087f6 | 617 | return error(_("Your index file is unmerged.")); |
043a4492 | 618 | } else { |
334ae397 MZ |
619 | unborn = get_sha1("HEAD", head); |
620 | if (unborn) | |
621 | hashcpy(head, EMPTY_TREE_SHA1_BIN); | |
622 | if (index_differs_from(unborn ? EMPTY_TREE_SHA1_HEX : "HEAD", 0)) | |
043a4492 RR |
623 | return error_dirty_index(opts); |
624 | } | |
625 | discard_cache(); | |
626 | ||
627 | if (!commit->parents) { | |
628 | parent = NULL; | |
629 | } | |
630 | else if (commit->parents->next) { | |
631 | /* Reverting or cherry-picking a merge commit */ | |
632 | int cnt; | |
633 | struct commit_list *p; | |
634 | ||
635 | if (!opts->mainline) | |
636 | return error(_("Commit %s is a merge but no -m option was given."), | |
f2fd0760 | 637 | oid_to_hex(&commit->object.oid)); |
043a4492 RR |
638 | |
639 | for (cnt = 1, p = commit->parents; | |
640 | cnt != opts->mainline && p; | |
641 | cnt++) | |
642 | p = p->next; | |
643 | if (cnt != opts->mainline || !p) | |
644 | return error(_("Commit %s does not have parent %d"), | |
f2fd0760 | 645 | oid_to_hex(&commit->object.oid), opts->mainline); |
043a4492 RR |
646 | parent = p->item; |
647 | } else if (0 < opts->mainline) | |
648 | return error(_("Mainline was specified but commit %s is not a merge."), | |
f2fd0760 | 649 | oid_to_hex(&commit->object.oid)); |
043a4492 RR |
650 | else |
651 | parent = commit->parents->item; | |
652 | ||
334ae397 | 653 | if (opts->allow_ff && |
ed1c9977 | 654 | ((parent && !hashcmp(parent->object.oid.hash, head)) || |
334ae397 | 655 | (!parent && unborn))) |
ed1c9977 | 656 | return fast_forward_to(commit->object.oid.hash, head, unborn, opts); |
043a4492 RR |
657 | |
658 | if (parent && parse_commit(parent) < 0) | |
004fefa7 JS |
659 | /* TRANSLATORS: The first %s will be a "todo" command like |
660 | "revert" or "pick", the second %s a SHA1. */ | |
043a4492 | 661 | return error(_("%s: cannot parse parent commit %s"), |
004fefa7 JS |
662 | command_to_string(command), |
663 | oid_to_hex(&parent->object.oid)); | |
043a4492 RR |
664 | |
665 | if (get_message(commit, &msg) != 0) | |
666 | return error(_("Cannot get commit message for %s"), | |
f2fd0760 | 667 | oid_to_hex(&commit->object.oid)); |
043a4492 RR |
668 | |
669 | /* | |
670 | * "commit" is an existing commit. We would want to apply | |
671 | * the difference it introduces since its first parent "prev" | |
672 | * on top of the current HEAD if we are cherry-pick. Or the | |
673 | * reverse of it if we are revert. | |
674 | */ | |
675 | ||
004fefa7 | 676 | if (command == TODO_REVERT) { |
043a4492 RR |
677 | base = commit; |
678 | base_label = msg.label; | |
679 | next = parent; | |
680 | next_label = msg.parent_label; | |
681 | strbuf_addstr(&msgbuf, "Revert \""); | |
682 | strbuf_addstr(&msgbuf, msg.subject); | |
683 | strbuf_addstr(&msgbuf, "\"\n\nThis reverts commit "); | |
f2fd0760 | 684 | strbuf_addstr(&msgbuf, oid_to_hex(&commit->object.oid)); |
043a4492 RR |
685 | |
686 | if (commit->parents && commit->parents->next) { | |
687 | strbuf_addstr(&msgbuf, ", reversing\nchanges made to "); | |
f2fd0760 | 688 | strbuf_addstr(&msgbuf, oid_to_hex(&parent->object.oid)); |
043a4492 RR |
689 | } |
690 | strbuf_addstr(&msgbuf, ".\n"); | |
691 | } else { | |
692 | const char *p; | |
693 | ||
694 | base = parent; | |
695 | base_label = msg.parent_label; | |
696 | next = commit; | |
697 | next_label = msg.label; | |
698 | ||
699 | /* | |
700 | * Append the commit log message to msgbuf; it starts | |
701 | * after the tree, parent, author, committer | |
702 | * information followed by "\n\n". | |
703 | */ | |
704 | p = strstr(msg.message, "\n\n"); | |
88ef402f JS |
705 | if (p) |
706 | strbuf_addstr(&msgbuf, skip_blank_lines(p + 2)); | |
043a4492 RR |
707 | |
708 | if (opts->record_origin) { | |
bab4d109 | 709 | if (!has_conforming_footer(&msgbuf, NULL, 0)) |
b971e04f | 710 | strbuf_addch(&msgbuf, '\n'); |
cd650a4e | 711 | strbuf_addstr(&msgbuf, cherry_picked_prefix); |
f2fd0760 | 712 | strbuf_addstr(&msgbuf, oid_to_hex(&commit->object.oid)); |
043a4492 RR |
713 | strbuf_addstr(&msgbuf, ")\n"); |
714 | } | |
715 | } | |
716 | ||
004fefa7 | 717 | if (!opts->strategy || !strcmp(opts->strategy, "recursive") || command == TODO_REVERT) { |
043a4492 RR |
718 | res = do_recursive_merge(base, next, base_label, next_label, |
719 | head, &msgbuf, opts); | |
f241ff0d JS |
720 | if (res < 0) |
721 | return res; | |
4ef3d8f0 | 722 | res |= write_message(&msgbuf, git_path_merge_msg()); |
043a4492 RR |
723 | } else { |
724 | struct commit_list *common = NULL; | |
725 | struct commit_list *remotes = NULL; | |
726 | ||
4ef3d8f0 | 727 | res = write_message(&msgbuf, git_path_merge_msg()); |
043a4492 RR |
728 | |
729 | commit_list_insert(base, &common); | |
730 | commit_list_insert(next, &remotes); | |
03a4e260 JS |
731 | res |= try_merge_command(opts->strategy, |
732 | opts->xopts_nr, (const char **)opts->xopts, | |
043a4492 RR |
733 | common, sha1_to_hex(head), remotes); |
734 | free_commit_list(common); | |
735 | free_commit_list(remotes); | |
736 | } | |
737 | ||
738 | /* | |
739 | * If the merge was clean or if it failed due to conflict, we write | |
740 | * CHERRY_PICK_HEAD for the subsequent invocation of commit to use. | |
741 | * However, if the merge did not even start, then we don't want to | |
742 | * write it at all. | |
743 | */ | |
004fefa7 | 744 | if (command == TODO_PICK && !opts->no_commit && (res == 0 || res == 1) && |
dbfad033 JS |
745 | update_ref(NULL, "CHERRY_PICK_HEAD", commit->object.oid.hash, NULL, |
746 | REF_NODEREF, UPDATE_REFS_MSG_ON_ERR)) | |
747 | res = -1; | |
004fefa7 | 748 | if (command == TODO_REVERT && ((opts->no_commit && res == 0) || res == 1) && |
dbfad033 JS |
749 | update_ref(NULL, "REVERT_HEAD", commit->object.oid.hash, NULL, |
750 | REF_NODEREF, UPDATE_REFS_MSG_ON_ERR)) | |
751 | res = -1; | |
043a4492 RR |
752 | |
753 | if (res) { | |
004fefa7 | 754 | error(command == TODO_REVERT |
043a4492 RR |
755 | ? _("could not revert %s... %s") |
756 | : _("could not apply %s... %s"), | |
39755964 | 757 | short_commit_name(commit), msg.subject); |
ed727b19 | 758 | print_advice(res == 1, opts); |
043a4492 | 759 | rerere(opts->allow_rerere_auto); |
c8d1351d | 760 | goto leave; |
043a4492 RR |
761 | } |
762 | ||
c8d1351d | 763 | allow = allow_empty(opts, commit); |
706728a3 FC |
764 | if (allow < 0) { |
765 | res = allow; | |
766 | goto leave; | |
767 | } | |
c8d1351d | 768 | if (!opts->no_commit) |
b5a67045 JS |
769 | res = run_git_commit(opts->edit ? NULL : git_path_merge_msg(), |
770 | opts, allow); | |
c8d1351d FC |
771 | |
772 | leave: | |
d74a4e57 | 773 | free_message(commit, &msg); |
043a4492 RR |
774 | |
775 | return res; | |
776 | } | |
777 | ||
c3e8618c | 778 | static int prepare_revs(struct replay_opts *opts) |
043a4492 | 779 | { |
a73e22e9 MZ |
780 | /* |
781 | * picking (but not reverting) ranges (but not individual revisions) | |
782 | * should be done in reverse | |
783 | */ | |
784 | if (opts->action == REPLAY_PICK && !opts->revs->no_walk) | |
043a4492 RR |
785 | opts->revs->reverse ^= 1; |
786 | ||
787 | if (prepare_revision_walk(opts->revs)) | |
c3e8618c | 788 | return error(_("revision walk setup failed")); |
043a4492 RR |
789 | |
790 | if (!opts->revs->commits) | |
c3e8618c JS |
791 | return error(_("empty commit set passed")); |
792 | return 0; | |
043a4492 RR |
793 | } |
794 | ||
0d9c6dc9 | 795 | static int read_and_refresh_cache(struct replay_opts *opts) |
043a4492 RR |
796 | { |
797 | static struct lock_file index_lock; | |
798 | int index_fd = hold_locked_index(&index_lock, 0); | |
49fb937e JS |
799 | if (read_index_preload(&the_index, NULL) < 0) { |
800 | rollback_lock_file(&index_lock); | |
0d9c6dc9 JS |
801 | return error(_("git %s: failed to read the index"), |
802 | action_name(opts)); | |
49fb937e | 803 | } |
043a4492 | 804 | refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, NULL, NULL, NULL); |
33c297aa | 805 | if (the_index.cache_changed && index_fd >= 0) { |
49fb937e JS |
806 | if (write_locked_index(&the_index, &index_lock, COMMIT_LOCK)) { |
807 | rollback_lock_file(&index_lock); | |
0d9c6dc9 JS |
808 | return error(_("git %s: failed to refresh the index"), |
809 | action_name(opts)); | |
49fb937e | 810 | } |
043a4492 RR |
811 | } |
812 | rollback_lock_file(&index_lock); | |
0d9c6dc9 | 813 | return 0; |
043a4492 RR |
814 | } |
815 | ||
004fefa7 JS |
816 | struct todo_item { |
817 | enum todo_command command; | |
818 | struct commit *commit; | |
c22f7dfb JS |
819 | const char *arg; |
820 | int arg_len; | |
004fefa7 JS |
821 | size_t offset_in_buf; |
822 | }; | |
823 | ||
824 | struct todo_list { | |
825 | struct strbuf buf; | |
826 | struct todo_item *items; | |
827 | int nr, alloc, current; | |
828 | }; | |
829 | ||
830 | #define TODO_LIST_INIT { STRBUF_INIT } | |
831 | ||
832 | static void todo_list_release(struct todo_list *todo_list) | |
043a4492 | 833 | { |
004fefa7 JS |
834 | strbuf_release(&todo_list->buf); |
835 | free(todo_list->items); | |
836 | todo_list->items = NULL; | |
837 | todo_list->nr = todo_list->alloc = 0; | |
838 | } | |
043a4492 | 839 | |
004fefa7 JS |
840 | static struct todo_item *append_new_todo(struct todo_list *todo_list) |
841 | { | |
842 | ALLOC_GROW(todo_list->items, todo_list->nr + 1, todo_list->alloc); | |
843 | return todo_list->items + todo_list->nr++; | |
043a4492 RR |
844 | } |
845 | ||
004fefa7 | 846 | static int parse_insn_line(struct todo_item *item, const char *bol, char *eol) |
043a4492 RR |
847 | { |
848 | unsigned char commit_sha1[20]; | |
043a4492 | 849 | char *end_of_object_name; |
004fefa7 JS |
850 | int i, saved, status, padding; |
851 | ||
852 | for (i = 0; i < ARRAY_SIZE(todo_command_strings); i++) | |
853 | if (skip_prefix(bol, todo_command_strings[i], &bol)) { | |
854 | item->command = i; | |
855 | break; | |
856 | } | |
857 | if (i >= ARRAY_SIZE(todo_command_strings)) | |
858 | return -1; | |
043a4492 RR |
859 | |
860 | /* Eat up extra spaces/ tabs before object name */ | |
861 | padding = strspn(bol, " \t"); | |
862 | if (!padding) | |
004fefa7 | 863 | return -1; |
043a4492 RR |
864 | bol += padding; |
865 | ||
004fefa7 | 866 | end_of_object_name = (char *) bol + strcspn(bol, " \t\n"); |
043a4492 RR |
867 | saved = *end_of_object_name; |
868 | *end_of_object_name = '\0'; | |
869 | status = get_sha1(bol, commit_sha1); | |
870 | *end_of_object_name = saved; | |
871 | ||
c22f7dfb JS |
872 | item->arg = end_of_object_name + strspn(end_of_object_name, " \t"); |
873 | item->arg_len = (int)(eol - item->arg); | |
874 | ||
043a4492 | 875 | if (status < 0) |
004fefa7 | 876 | return -1; |
043a4492 | 877 | |
004fefa7 JS |
878 | item->commit = lookup_commit_reference(commit_sha1); |
879 | return !item->commit; | |
043a4492 RR |
880 | } |
881 | ||
004fefa7 | 882 | static int parse_insn_buffer(char *buf, struct todo_list *todo_list) |
043a4492 | 883 | { |
004fefa7 JS |
884 | struct todo_item *item; |
885 | char *p = buf, *next_p; | |
886 | int i, res = 0; | |
043a4492 | 887 | |
004fefa7 | 888 | for (i = 1; *p; i++, p = next_p) { |
043a4492 | 889 | char *eol = strchrnul(p, '\n'); |
004fefa7 JS |
890 | |
891 | next_p = *eol ? eol + 1 /* skip LF */ : eol; | |
892 | ||
6307041d JS |
893 | if (p != eol && eol[-1] == '\r') |
894 | eol--; /* strip Carriage Return */ | |
895 | ||
004fefa7 JS |
896 | item = append_new_todo(todo_list); |
897 | item->offset_in_buf = p - todo_list->buf.buf; | |
898 | if (parse_insn_line(item, p, eol)) { | |
899 | res = error(_("Invalid line %d: %.*s"), | |
900 | i, (int)(eol - p), p); | |
901 | item->command = -1; | |
902 | } | |
043a4492 | 903 | } |
004fefa7 | 904 | if (!todo_list->nr) |
043a4492 | 905 | return error(_("No commits parsed.")); |
004fefa7 | 906 | return res; |
043a4492 RR |
907 | } |
908 | ||
004fefa7 | 909 | static int read_populate_todo(struct todo_list *todo_list, |
043a4492 RR |
910 | struct replay_opts *opts) |
911 | { | |
c0246501 | 912 | const char *todo_file = get_todo_path(opts); |
043a4492 RR |
913 | int fd, res; |
914 | ||
004fefa7 | 915 | strbuf_reset(&todo_list->buf); |
c0246501 | 916 | fd = open(todo_file, O_RDONLY); |
043a4492 | 917 | if (fd < 0) |
c0246501 | 918 | return error_errno(_("Could not open %s"), todo_file); |
004fefa7 | 919 | if (strbuf_read(&todo_list->buf, fd, 0) < 0) { |
043a4492 | 920 | close(fd); |
c0246501 | 921 | return error(_("Could not read %s."), todo_file); |
043a4492 RR |
922 | } |
923 | close(fd); | |
924 | ||
004fefa7 JS |
925 | res = parse_insn_buffer(todo_list->buf.buf, todo_list); |
926 | if (!res) { | |
927 | enum todo_command valid = | |
928 | opts->action == REPLAY_PICK ? TODO_PICK : TODO_REVERT; | |
929 | int i; | |
930 | ||
931 | for (i = 0; i < todo_list->nr; i++) | |
932 | if (valid == todo_list->items[i].command) | |
933 | continue; | |
934 | else if (valid == TODO_PICK) | |
935 | return error(_("Cannot cherry-pick during a revert.")); | |
936 | else | |
937 | return error(_("Cannot revert during a cherry-pick.")); | |
938 | } | |
939 | ||
043a4492 | 940 | if (res) |
c0246501 | 941 | return error(_("Unusable instruction sheet: %s"), todo_file); |
0ae42a03 | 942 | return 0; |
043a4492 RR |
943 | } |
944 | ||
03a4e260 JS |
945 | static int git_config_string_dup(char **dest, |
946 | const char *var, const char *value) | |
947 | { | |
948 | if (!value) | |
949 | return config_error_nonbool(var); | |
950 | free(*dest); | |
951 | *dest = xstrdup(value); | |
952 | return 0; | |
953 | } | |
954 | ||
043a4492 RR |
955 | static int populate_opts_cb(const char *key, const char *value, void *data) |
956 | { | |
957 | struct replay_opts *opts = data; | |
958 | int error_flag = 1; | |
959 | ||
960 | if (!value) | |
961 | error_flag = 0; | |
962 | else if (!strcmp(key, "options.no-commit")) | |
963 | opts->no_commit = git_config_bool_or_int(key, value, &error_flag); | |
964 | else if (!strcmp(key, "options.edit")) | |
965 | opts->edit = git_config_bool_or_int(key, value, &error_flag); | |
966 | else if (!strcmp(key, "options.signoff")) | |
967 | opts->signoff = git_config_bool_or_int(key, value, &error_flag); | |
968 | else if (!strcmp(key, "options.record-origin")) | |
969 | opts->record_origin = git_config_bool_or_int(key, value, &error_flag); | |
970 | else if (!strcmp(key, "options.allow-ff")) | |
971 | opts->allow_ff = git_config_bool_or_int(key, value, &error_flag); | |
972 | else if (!strcmp(key, "options.mainline")) | |
973 | opts->mainline = git_config_int(key, value); | |
974 | else if (!strcmp(key, "options.strategy")) | |
03a4e260 | 975 | git_config_string_dup(&opts->strategy, key, value); |
3253553e | 976 | else if (!strcmp(key, "options.gpg-sign")) |
03a4e260 | 977 | git_config_string_dup(&opts->gpg_sign, key, value); |
043a4492 RR |
978 | else if (!strcmp(key, "options.strategy-option")) { |
979 | ALLOC_GROW(opts->xopts, opts->xopts_nr + 1, opts->xopts_alloc); | |
980 | opts->xopts[opts->xopts_nr++] = xstrdup(value); | |
981 | } else | |
982 | return error(_("Invalid key: %s"), key); | |
983 | ||
984 | if (!error_flag) | |
985 | return error(_("Invalid value for %s: %s"), key, value); | |
986 | ||
987 | return 0; | |
988 | } | |
989 | ||
5adf9bdc | 990 | static int read_populate_opts(struct replay_opts *opts) |
043a4492 | 991 | { |
b5a67045 JS |
992 | if (is_rebase_i(opts)) |
993 | return 0; | |
994 | ||
f932729c | 995 | if (!file_exists(git_path_opts_file())) |
0d00da7b JS |
996 | return 0; |
997 | /* | |
998 | * The function git_parse_source(), called from git_config_from_file(), | |
999 | * may die() in case of a syntactically incorrect file. We do not care | |
1000 | * about this case, though, because we wrote that file ourselves, so we | |
1001 | * are pretty certain that it is syntactically correct. | |
1002 | */ | |
5adf9bdc | 1003 | if (git_config_from_file(populate_opts_cb, git_path_opts_file(), opts) < 0) |
0d00da7b JS |
1004 | return error(_("Malformed options sheet: %s"), |
1005 | git_path_opts_file()); | |
1006 | return 0; | |
043a4492 RR |
1007 | } |
1008 | ||
004fefa7 | 1009 | static int walk_revs_populate_todo(struct todo_list *todo_list, |
043a4492 RR |
1010 | struct replay_opts *opts) |
1011 | { | |
004fefa7 JS |
1012 | enum todo_command command = opts->action == REPLAY_PICK ? |
1013 | TODO_PICK : TODO_REVERT; | |
1014 | const char *command_string = todo_command_strings[command]; | |
043a4492 | 1015 | struct commit *commit; |
043a4492 | 1016 | |
34b0528b JS |
1017 | if (prepare_revs(opts)) |
1018 | return -1; | |
043a4492 | 1019 | |
004fefa7 JS |
1020 | while ((commit = get_revision(opts->revs))) { |
1021 | struct todo_item *item = append_new_todo(todo_list); | |
1022 | const char *commit_buffer = get_commit_buffer(commit, NULL); | |
1023 | const char *subject; | |
1024 | int subject_len; | |
1025 | ||
1026 | item->command = command; | |
1027 | item->commit = commit; | |
c22f7dfb JS |
1028 | item->arg = NULL; |
1029 | item->arg_len = 0; | |
004fefa7 JS |
1030 | item->offset_in_buf = todo_list->buf.len; |
1031 | subject_len = find_commit_subject(commit_buffer, &subject); | |
1032 | strbuf_addf(&todo_list->buf, "%s %s %.*s\n", command_string, | |
1033 | short_commit_name(commit), subject_len, subject); | |
1034 | unuse_commit_buffer(commit, commit_buffer); | |
1035 | } | |
34b0528b | 1036 | return 0; |
043a4492 RR |
1037 | } |
1038 | ||
1039 | static int create_seq_dir(void) | |
1040 | { | |
f932729c | 1041 | if (file_exists(git_path_seq_dir())) { |
043a4492 RR |
1042 | error(_("a cherry-pick or revert is already in progress")); |
1043 | advise(_("try \"git cherry-pick (--continue | --quit | --abort)\"")); | |
1044 | return -1; | |
1045 | } | |
f932729c | 1046 | else if (mkdir(git_path_seq_dir(), 0777) < 0) |
f6e82b0d JS |
1047 | return error_errno(_("Could not create sequencer directory %s"), |
1048 | git_path_seq_dir()); | |
043a4492 RR |
1049 | return 0; |
1050 | } | |
1051 | ||
311fd397 | 1052 | static int save_head(const char *head) |
043a4492 | 1053 | { |
043a4492 RR |
1054 | static struct lock_file head_lock; |
1055 | struct strbuf buf = STRBUF_INIT; | |
1056 | int fd; | |
1057 | ||
311fd397 JS |
1058 | fd = hold_lock_file_for_update(&head_lock, git_path_head_file(), 0); |
1059 | if (fd < 0) { | |
1060 | rollback_lock_file(&head_lock); | |
1061 | return error_errno(_("Could not lock HEAD")); | |
1062 | } | |
043a4492 | 1063 | strbuf_addf(&buf, "%s\n", head); |
311fd397 JS |
1064 | if (write_in_full(fd, buf.buf, buf.len) < 0) { |
1065 | rollback_lock_file(&head_lock); | |
1066 | return error_errno(_("Could not write to %s"), | |
1067 | git_path_head_file()); | |
1068 | } | |
1069 | if (commit_lock_file(&head_lock) < 0) { | |
1070 | rollback_lock_file(&head_lock); | |
1071 | return error(_("Error wrapping up %s."), git_path_head_file()); | |
1072 | } | |
1073 | return 0; | |
043a4492 RR |
1074 | } |
1075 | ||
1076 | static int reset_for_rollback(const unsigned char *sha1) | |
1077 | { | |
1078 | const char *argv[4]; /* reset --merge <arg> + NULL */ | |
1079 | argv[0] = "reset"; | |
1080 | argv[1] = "--merge"; | |
1081 | argv[2] = sha1_to_hex(sha1); | |
1082 | argv[3] = NULL; | |
1083 | return run_command_v_opt(argv, RUN_GIT_CMD); | |
1084 | } | |
1085 | ||
1086 | static int rollback_single_pick(void) | |
1087 | { | |
1088 | unsigned char head_sha1[20]; | |
1089 | ||
f932729c JK |
1090 | if (!file_exists(git_path_cherry_pick_head()) && |
1091 | !file_exists(git_path_revert_head())) | |
043a4492 | 1092 | return error(_("no cherry-pick or revert in progress")); |
7695d118 | 1093 | if (read_ref_full("HEAD", 0, head_sha1, NULL)) |
043a4492 RR |
1094 | return error(_("cannot resolve HEAD")); |
1095 | if (is_null_sha1(head_sha1)) | |
1096 | return error(_("cannot abort from a branch yet to be born")); | |
1097 | return reset_for_rollback(head_sha1); | |
1098 | } | |
1099 | ||
2863584f | 1100 | int sequencer_rollback(struct replay_opts *opts) |
043a4492 | 1101 | { |
043a4492 RR |
1102 | FILE *f; |
1103 | unsigned char sha1[20]; | |
1104 | struct strbuf buf = STRBUF_INIT; | |
1105 | ||
f932729c | 1106 | f = fopen(git_path_head_file(), "r"); |
043a4492 RR |
1107 | if (!f && errno == ENOENT) { |
1108 | /* | |
1109 | * There is no multiple-cherry-pick in progress. | |
1110 | * If CHERRY_PICK_HEAD or REVERT_HEAD indicates | |
1111 | * a single-cherry-pick in progress, abort that. | |
1112 | */ | |
1113 | return rollback_single_pick(); | |
1114 | } | |
1115 | if (!f) | |
6c979c74 | 1116 | return error_errno(_("cannot open %s"), git_path_head_file()); |
8f309aeb | 1117 | if (strbuf_getline_lf(&buf, f)) { |
f932729c JK |
1118 | error(_("cannot read %s: %s"), git_path_head_file(), |
1119 | ferror(f) ? strerror(errno) : _("unexpected end of file")); | |
043a4492 RR |
1120 | fclose(f); |
1121 | goto fail; | |
1122 | } | |
1123 | fclose(f); | |
1124 | if (get_sha1_hex(buf.buf, sha1) || buf.buf[40] != '\0') { | |
1125 | error(_("stored pre-cherry-pick HEAD file '%s' is corrupt"), | |
f932729c | 1126 | git_path_head_file()); |
043a4492 RR |
1127 | goto fail; |
1128 | } | |
0f974e21 MG |
1129 | if (is_null_sha1(sha1)) { |
1130 | error(_("cannot abort from a branch yet to be born")); | |
1131 | goto fail; | |
1132 | } | |
043a4492 RR |
1133 | if (reset_for_rollback(sha1)) |
1134 | goto fail; | |
043a4492 | 1135 | strbuf_release(&buf); |
2863584f | 1136 | return sequencer_remove_state(opts); |
043a4492 RR |
1137 | fail: |
1138 | strbuf_release(&buf); | |
1139 | return -1; | |
1140 | } | |
1141 | ||
004fefa7 | 1142 | static int save_todo(struct todo_list *todo_list, struct replay_opts *opts) |
043a4492 | 1143 | { |
043a4492 | 1144 | static struct lock_file todo_lock; |
004fefa7 JS |
1145 | const char *todo_path = get_todo_path(opts); |
1146 | int next = todo_list->current, offset, fd; | |
043a4492 | 1147 | |
004fefa7 | 1148 | fd = hold_lock_file_for_update(&todo_lock, todo_path, 0); |
221675de | 1149 | if (fd < 0) |
004fefa7 JS |
1150 | return error_errno(_("Could not lock '%s'"), todo_path); |
1151 | offset = next < todo_list->nr ? | |
1152 | todo_list->items[next].offset_in_buf : todo_list->buf.len; | |
1153 | if (write_in_full(fd, todo_list->buf.buf + offset, | |
1154 | todo_list->buf.len - offset) < 0) | |
1155 | return error_errno(_("Could not write to '%s'"), todo_path); | |
1156 | if (commit_lock_file(&todo_lock) < 0) | |
1157 | return error(_("Error wrapping up %s."), todo_path); | |
221675de | 1158 | return 0; |
043a4492 RR |
1159 | } |
1160 | ||
88d5a271 | 1161 | static int save_opts(struct replay_opts *opts) |
043a4492 | 1162 | { |
f932729c | 1163 | const char *opts_file = git_path_opts_file(); |
88d5a271 | 1164 | int res = 0; |
043a4492 RR |
1165 | |
1166 | if (opts->no_commit) | |
88d5a271 | 1167 | res |= git_config_set_in_file_gently(opts_file, "options.no-commit", "true"); |
043a4492 | 1168 | if (opts->edit) |
88d5a271 | 1169 | res |= git_config_set_in_file_gently(opts_file, "options.edit", "true"); |
043a4492 | 1170 | if (opts->signoff) |
88d5a271 | 1171 | res |= git_config_set_in_file_gently(opts_file, "options.signoff", "true"); |
043a4492 | 1172 | if (opts->record_origin) |
88d5a271 | 1173 | res |= git_config_set_in_file_gently(opts_file, "options.record-origin", "true"); |
043a4492 | 1174 | if (opts->allow_ff) |
88d5a271 | 1175 | res |= git_config_set_in_file_gently(opts_file, "options.allow-ff", "true"); |
043a4492 RR |
1176 | if (opts->mainline) { |
1177 | struct strbuf buf = STRBUF_INIT; | |
1178 | strbuf_addf(&buf, "%d", opts->mainline); | |
88d5a271 | 1179 | res |= git_config_set_in_file_gently(opts_file, "options.mainline", buf.buf); |
043a4492 RR |
1180 | strbuf_release(&buf); |
1181 | } | |
1182 | if (opts->strategy) | |
88d5a271 | 1183 | res |= git_config_set_in_file_gently(opts_file, "options.strategy", opts->strategy); |
3253553e | 1184 | if (opts->gpg_sign) |
88d5a271 | 1185 | res |= git_config_set_in_file_gently(opts_file, "options.gpg-sign", opts->gpg_sign); |
043a4492 RR |
1186 | if (opts->xopts) { |
1187 | int i; | |
1188 | for (i = 0; i < opts->xopts_nr; i++) | |
88d5a271 | 1189 | res |= git_config_set_multivar_in_file_gently(opts_file, |
043a4492 RR |
1190 | "options.strategy-option", |
1191 | opts->xopts[i], "^$", 0); | |
1192 | } | |
88d5a271 | 1193 | return res; |
043a4492 RR |
1194 | } |
1195 | ||
004fefa7 | 1196 | static int pick_commits(struct todo_list *todo_list, struct replay_opts *opts) |
043a4492 | 1197 | { |
043a4492 RR |
1198 | int res; |
1199 | ||
1200 | setenv(GIT_REFLOG_ACTION, action_name(opts), 0); | |
1201 | if (opts->allow_ff) | |
1202 | assert(!(opts->signoff || opts->no_commit || | |
1203 | opts->record_origin || opts->edit)); | |
0d9c6dc9 JS |
1204 | if (read_and_refresh_cache(opts)) |
1205 | return -1; | |
043a4492 | 1206 | |
004fefa7 JS |
1207 | while (todo_list->current < todo_list->nr) { |
1208 | struct todo_item *item = todo_list->items + todo_list->current; | |
1209 | if (save_todo(todo_list, opts)) | |
221675de | 1210 | return -1; |
004fefa7 JS |
1211 | res = do_pick_commit(item->command, item->commit, opts); |
1212 | todo_list->current++; | |
043a4492 RR |
1213 | if (res) |
1214 | return res; | |
1215 | } | |
1216 | ||
1217 | /* | |
1218 | * Sequence of picks finished successfully; cleanup by | |
1219 | * removing the .git/sequencer directory | |
1220 | */ | |
2863584f | 1221 | return sequencer_remove_state(opts); |
043a4492 RR |
1222 | } |
1223 | ||
1224 | static int continue_single_pick(void) | |
1225 | { | |
1226 | const char *argv[] = { "commit", NULL }; | |
1227 | ||
f932729c JK |
1228 | if (!file_exists(git_path_cherry_pick_head()) && |
1229 | !file_exists(git_path_revert_head())) | |
043a4492 RR |
1230 | return error(_("no cherry-pick or revert in progress")); |
1231 | return run_command_v_opt(argv, RUN_GIT_CMD); | |
1232 | } | |
1233 | ||
2863584f | 1234 | int sequencer_continue(struct replay_opts *opts) |
043a4492 | 1235 | { |
004fefa7 JS |
1236 | struct todo_list todo_list = TODO_LIST_INIT; |
1237 | int res; | |
043a4492 | 1238 | |
2863584f JS |
1239 | if (read_and_refresh_cache(opts)) |
1240 | return -1; | |
1241 | ||
c0246501 | 1242 | if (!file_exists(get_todo_path(opts))) |
043a4492 | 1243 | return continue_single_pick(); |
004fefa7 | 1244 | if (read_populate_opts(opts)) |
0ae42a03 | 1245 | return -1; |
004fefa7 JS |
1246 | if ((res = read_populate_todo(&todo_list, opts))) |
1247 | goto release_todo_list; | |
043a4492 RR |
1248 | |
1249 | /* Verify that the conflict has been resolved */ | |
f932729c JK |
1250 | if (file_exists(git_path_cherry_pick_head()) || |
1251 | file_exists(git_path_revert_head())) { | |
004fefa7 JS |
1252 | res = continue_single_pick(); |
1253 | if (res) | |
1254 | goto release_todo_list; | |
043a4492 | 1255 | } |
004fefa7 JS |
1256 | if (index_differs_from("HEAD", 0)) { |
1257 | res = error_dirty_index(opts); | |
1258 | goto release_todo_list; | |
1259 | } | |
1260 | todo_list.current++; | |
1261 | res = pick_commits(&todo_list, opts); | |
1262 | release_todo_list: | |
1263 | todo_list_release(&todo_list); | |
1264 | return res; | |
043a4492 RR |
1265 | } |
1266 | ||
1267 | static int single_pick(struct commit *cmit, struct replay_opts *opts) | |
1268 | { | |
1269 | setenv(GIT_REFLOG_ACTION, action_name(opts), 0); | |
004fefa7 JS |
1270 | return do_pick_commit(opts->action == REPLAY_PICK ? |
1271 | TODO_PICK : TODO_REVERT, cmit, opts); | |
043a4492 RR |
1272 | } |
1273 | ||
1274 | int sequencer_pick_revisions(struct replay_opts *opts) | |
1275 | { | |
004fefa7 | 1276 | struct todo_list todo_list = TODO_LIST_INIT; |
043a4492 | 1277 | unsigned char sha1[20]; |
004fefa7 | 1278 | int i, res; |
043a4492 | 1279 | |
2863584f | 1280 | assert(opts->revs); |
0d9c6dc9 JS |
1281 | if (read_and_refresh_cache(opts)) |
1282 | return -1; | |
043a4492 | 1283 | |
21246dbb MV |
1284 | for (i = 0; i < opts->revs->pending.nr; i++) { |
1285 | unsigned char sha1[20]; | |
1286 | const char *name = opts->revs->pending.objects[i].name; | |
1287 | ||
1288 | /* This happens when using --stdin. */ | |
1289 | if (!strlen(name)) | |
1290 | continue; | |
1291 | ||
1292 | if (!get_sha1(name, sha1)) { | |
7c0b0d8d JH |
1293 | if (!lookup_commit_reference_gently(sha1, 1)) { |
1294 | enum object_type type = sha1_object_info(sha1, NULL); | |
b9b946d4 JS |
1295 | return error(_("%s: can't cherry-pick a %s"), |
1296 | name, typename(type)); | |
7c0b0d8d | 1297 | } |
21246dbb | 1298 | } else |
b9b946d4 | 1299 | return error(_("%s: bad revision"), name); |
21246dbb MV |
1300 | } |
1301 | ||
043a4492 RR |
1302 | /* |
1303 | * If we were called as "git cherry-pick <commit>", just | |
1304 | * cherry-pick/revert it, set CHERRY_PICK_HEAD / | |
1305 | * REVERT_HEAD, and don't touch the sequencer state. | |
1306 | * This means it is possible to cherry-pick in the middle | |
1307 | * of a cherry-pick sequence. | |
1308 | */ | |
1309 | if (opts->revs->cmdline.nr == 1 && | |
1310 | opts->revs->cmdline.rev->whence == REV_CMD_REV && | |
1311 | opts->revs->no_walk && | |
1312 | !opts->revs->cmdline.rev->flags) { | |
1313 | struct commit *cmit; | |
1314 | if (prepare_revision_walk(opts->revs)) | |
b9b946d4 | 1315 | return error(_("revision walk setup failed")); |
043a4492 RR |
1316 | cmit = get_revision(opts->revs); |
1317 | if (!cmit || get_revision(opts->revs)) | |
b9b946d4 | 1318 | return error("BUG: expected exactly one commit from walk"); |
043a4492 RR |
1319 | return single_pick(cmit, opts); |
1320 | } | |
1321 | ||
1322 | /* | |
1323 | * Start a new cherry-pick/ revert sequence; but | |
1324 | * first, make sure that an existing one isn't in | |
1325 | * progress | |
1326 | */ | |
1327 | ||
34b0528b JS |
1328 | if (walk_revs_populate_todo(&todo_list, opts) || |
1329 | create_seq_dir() < 0) | |
043a4492 | 1330 | return -1; |
0f974e21 MG |
1331 | if (get_sha1("HEAD", sha1) && (opts->action == REPLAY_REVERT)) |
1332 | return error(_("Can't revert as initial commit")); | |
311fd397 JS |
1333 | if (save_head(sha1_to_hex(sha1))) |
1334 | return -1; | |
88d5a271 JS |
1335 | if (save_opts(opts)) |
1336 | return -1; | |
004fefa7 JS |
1337 | res = pick_commits(&todo_list, opts); |
1338 | todo_list_release(&todo_list); | |
1339 | return res; | |
043a4492 | 1340 | } |
5ed75e2a | 1341 | |
bab4d109 | 1342 | void append_signoff(struct strbuf *msgbuf, int ignore_footer, unsigned flag) |
5ed75e2a | 1343 | { |
bab4d109 | 1344 | unsigned no_dup_sob = flag & APPEND_SIGNOFF_DEDUP; |
5ed75e2a | 1345 | struct strbuf sob = STRBUF_INIT; |
bab4d109 | 1346 | int has_footer; |
5ed75e2a MV |
1347 | |
1348 | strbuf_addstr(&sob, sign_off_header); | |
1349 | strbuf_addstr(&sob, fmt_name(getenv("GIT_COMMITTER_NAME"), | |
1350 | getenv("GIT_COMMITTER_EMAIL"))); | |
1351 | strbuf_addch(&sob, '\n'); | |
bab4d109 BC |
1352 | |
1353 | /* | |
1354 | * If the whole message buffer is equal to the sob, pretend that we | |
1355 | * found a conforming footer with a matching sob | |
1356 | */ | |
1357 | if (msgbuf->len - ignore_footer == sob.len && | |
1358 | !strncmp(msgbuf->buf, sob.buf, sob.len)) | |
1359 | has_footer = 3; | |
1360 | else | |
1361 | has_footer = has_conforming_footer(msgbuf, &sob, ignore_footer); | |
1362 | ||
33f2f9ab BC |
1363 | if (!has_footer) { |
1364 | const char *append_newlines = NULL; | |
1365 | size_t len = msgbuf->len - ignore_footer; | |
1366 | ||
8c613fd5 BC |
1367 | if (!len) { |
1368 | /* | |
1369 | * The buffer is completely empty. Leave foom for | |
1370 | * the title and body to be filled in by the user. | |
1371 | */ | |
33f2f9ab | 1372 | append_newlines = "\n\n"; |
8c613fd5 BC |
1373 | } else if (msgbuf->buf[len - 1] != '\n') { |
1374 | /* | |
1375 | * Incomplete line. Complete the line and add a | |
1376 | * blank one so that there is an empty line between | |
1377 | * the message body and the sob. | |
1378 | */ | |
1379 | append_newlines = "\n\n"; | |
1380 | } else if (len == 1) { | |
1381 | /* | |
1382 | * Buffer contains a single newline. Add another | |
1383 | * so that we leave room for the title and body. | |
1384 | */ | |
1385 | append_newlines = "\n"; | |
1386 | } else if (msgbuf->buf[len - 2] != '\n') { | |
1387 | /* | |
1388 | * Buffer ends with a single newline. Add another | |
1389 | * so that there is an empty line between the message | |
1390 | * body and the sob. | |
1391 | */ | |
33f2f9ab | 1392 | append_newlines = "\n"; |
8c613fd5 | 1393 | } /* else, the buffer already ends with two newlines. */ |
33f2f9ab BC |
1394 | |
1395 | if (append_newlines) | |
1396 | strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0, | |
1397 | append_newlines, strlen(append_newlines)); | |
5ed75e2a | 1398 | } |
bab4d109 BC |
1399 | |
1400 | if (has_footer != 3 && (!no_dup_sob || has_footer != 2)) | |
1401 | strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0, | |
1402 | sob.buf, sob.len); | |
1403 | ||
5ed75e2a MV |
1404 | strbuf_release(&sob); |
1405 | } |