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Commit | Line | Data |
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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" |
a1c75762 | 18 | #include "quote.h" |
043a4492 RR |
19 | |
20 | #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION" | |
26ae337b | 21 | |
5ed75e2a | 22 | const char sign_off_header[] = "Signed-off-by: "; |
cd650a4e | 23 | static const char cherry_picked_prefix[] = "(cherry picked from commit "; |
5ed75e2a | 24 | |
8a2a0f53 JS |
25 | GIT_PATH_FUNC(git_path_seq_dir, "sequencer") |
26 | ||
27 | static GIT_PATH_FUNC(git_path_todo_file, "sequencer/todo") | |
28 | static GIT_PATH_FUNC(git_path_opts_file, "sequencer/opts") | |
29 | static GIT_PATH_FUNC(git_path_head_file, "sequencer/head") | |
f932729c | 30 | |
b5a67045 JS |
31 | /* |
32 | * A script to set the GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL, and | |
33 | * GIT_AUTHOR_DATE that will be used for the commit that is currently | |
34 | * being rebased. | |
35 | */ | |
36 | static GIT_PATH_FUNC(rebase_path_author_script, "rebase-merge/author-script") | |
a1c75762 JS |
37 | /* |
38 | * The following files are written by git-rebase just after parsing the | |
39 | * command-line (and are only consumed, not modified, by the sequencer). | |
40 | */ | |
41 | static GIT_PATH_FUNC(rebase_path_gpg_sign_opt, "rebase-merge/gpg_sign_opt") | |
b5a67045 JS |
42 | |
43 | /* We will introduce the 'interactive rebase' mode later */ | |
44 | static inline int is_rebase_i(const struct replay_opts *opts) | |
45 | { | |
46 | return 0; | |
47 | } | |
48 | ||
285abf56 JS |
49 | static const char *get_dir(const struct replay_opts *opts) |
50 | { | |
51 | return git_path_seq_dir(); | |
52 | } | |
53 | ||
c0246501 JS |
54 | static const char *get_todo_path(const struct replay_opts *opts) |
55 | { | |
56 | return git_path_todo_file(); | |
57 | } | |
58 | ||
b971e04f BC |
59 | static int is_rfc2822_line(const char *buf, int len) |
60 | { | |
61 | int i; | |
62 | ||
63 | for (i = 0; i < len; i++) { | |
64 | int ch = buf[i]; | |
65 | if (ch == ':') | |
66 | return 1; | |
67 | if (!isalnum(ch) && ch != '-') | |
68 | break; | |
69 | } | |
70 | ||
71 | return 0; | |
72 | } | |
73 | ||
74 | static int is_cherry_picked_from_line(const char *buf, int len) | |
75 | { | |
76 | /* | |
77 | * We only care that it looks roughly like (cherry picked from ...) | |
78 | */ | |
79 | return len > strlen(cherry_picked_prefix) + 1 && | |
59556548 | 80 | starts_with(buf, cherry_picked_prefix) && buf[len - 1] == ')'; |
b971e04f BC |
81 | } |
82 | ||
bab4d109 BC |
83 | /* |
84 | * Returns 0 for non-conforming footer | |
85 | * Returns 1 for conforming footer | |
86 | * Returns 2 when sob exists within conforming footer | |
87 | * Returns 3 when sob exists within conforming footer as last entry | |
88 | */ | |
89 | static int has_conforming_footer(struct strbuf *sb, struct strbuf *sob, | |
90 | int ignore_footer) | |
b971e04f BC |
91 | { |
92 | char prev; | |
93 | int i, k; | |
94 | int len = sb->len - ignore_footer; | |
95 | const char *buf = sb->buf; | |
bab4d109 | 96 | int found_sob = 0; |
b971e04f BC |
97 | |
98 | /* footer must end with newline */ | |
99 | if (!len || buf[len - 1] != '\n') | |
100 | return 0; | |
101 | ||
102 | prev = '\0'; | |
103 | for (i = len - 1; i > 0; i--) { | |
104 | char ch = buf[i]; | |
105 | if (prev == '\n' && ch == '\n') /* paragraph break */ | |
106 | break; | |
107 | prev = ch; | |
108 | } | |
109 | ||
110 | /* require at least one blank line */ | |
111 | if (prev != '\n' || buf[i] != '\n') | |
112 | return 0; | |
113 | ||
114 | /* advance to start of last paragraph */ | |
115 | while (i < len - 1 && buf[i] == '\n') | |
116 | i++; | |
117 | ||
118 | for (; i < len; i = k) { | |
bab4d109 BC |
119 | int found_rfc2822; |
120 | ||
b971e04f BC |
121 | for (k = i; k < len && buf[k] != '\n'; k++) |
122 | ; /* do nothing */ | |
123 | k++; | |
124 | ||
bab4d109 BC |
125 | found_rfc2822 = is_rfc2822_line(buf + i, k - i - 1); |
126 | if (found_rfc2822 && sob && | |
127 | !strncmp(buf + i, sob->buf, sob->len)) | |
128 | found_sob = k; | |
129 | ||
130 | if (!(found_rfc2822 || | |
131 | is_cherry_picked_from_line(buf + i, k - i - 1))) | |
b971e04f BC |
132 | return 0; |
133 | } | |
bab4d109 BC |
134 | if (found_sob == i) |
135 | return 3; | |
136 | if (found_sob) | |
137 | return 2; | |
b971e04f BC |
138 | return 1; |
139 | } | |
5ed75e2a | 140 | |
a1c75762 JS |
141 | static const char *gpg_sign_opt_quoted(struct replay_opts *opts) |
142 | { | |
143 | static struct strbuf buf = STRBUF_INIT; | |
144 | ||
145 | strbuf_reset(&buf); | |
146 | if (opts->gpg_sign) | |
147 | sq_quotef(&buf, "-S%s", opts->gpg_sign); | |
148 | return buf.buf; | |
149 | } | |
150 | ||
2863584f | 151 | int sequencer_remove_state(struct replay_opts *opts) |
26ae337b | 152 | { |
285abf56 | 153 | struct strbuf dir = STRBUF_INIT; |
03a4e260 JS |
154 | int i; |
155 | ||
156 | free(opts->gpg_sign); | |
157 | free(opts->strategy); | |
158 | for (i = 0; i < opts->xopts_nr; i++) | |
159 | free(opts->xopts[i]); | |
160 | free(opts->xopts); | |
26ae337b | 161 | |
285abf56 JS |
162 | strbuf_addf(&dir, "%s", get_dir(opts)); |
163 | remove_dir_recursively(&dir, 0); | |
164 | strbuf_release(&dir); | |
2863584f JS |
165 | |
166 | return 0; | |
26ae337b | 167 | } |
043a4492 RR |
168 | |
169 | static const char *action_name(const struct replay_opts *opts) | |
170 | { | |
171 | return opts->action == REPLAY_REVERT ? "revert" : "cherry-pick"; | |
172 | } | |
173 | ||
043a4492 RR |
174 | struct commit_message { |
175 | char *parent_label; | |
7b35eaf8 JK |
176 | char *label; |
177 | char *subject; | |
043a4492 RR |
178 | const char *message; |
179 | }; | |
180 | ||
39755964 JS |
181 | static const char *short_commit_name(struct commit *commit) |
182 | { | |
183 | return find_unique_abbrev(commit->object.oid.hash, DEFAULT_ABBREV); | |
184 | } | |
185 | ||
043a4492 RR |
186 | static int get_message(struct commit *commit, struct commit_message *out) |
187 | { | |
043a4492 | 188 | const char *abbrev, *subject; |
7b35eaf8 | 189 | int subject_len; |
043a4492 | 190 | |
7b35eaf8 | 191 | out->message = logmsg_reencode(commit, NULL, get_commit_output_encoding()); |
39755964 | 192 | abbrev = short_commit_name(commit); |
043a4492 RR |
193 | |
194 | subject_len = find_commit_subject(out->message, &subject); | |
195 | ||
7b35eaf8 JK |
196 | out->subject = xmemdupz(subject, subject_len); |
197 | out->label = xstrfmt("%s... %s", abbrev, out->subject); | |
198 | out->parent_label = xstrfmt("parent of %s", out->label); | |
199 | ||
043a4492 RR |
200 | return 0; |
201 | } | |
202 | ||
d74a4e57 | 203 | static void free_message(struct commit *commit, struct commit_message *msg) |
043a4492 RR |
204 | { |
205 | free(msg->parent_label); | |
7b35eaf8 JK |
206 | free(msg->label); |
207 | free(msg->subject); | |
b66103c3 | 208 | unuse_commit_buffer(commit, msg->message); |
043a4492 RR |
209 | } |
210 | ||
ed727b19 | 211 | static void print_advice(int show_hint, struct replay_opts *opts) |
043a4492 RR |
212 | { |
213 | char *msg = getenv("GIT_CHERRY_PICK_HELP"); | |
214 | ||
215 | if (msg) { | |
216 | fprintf(stderr, "%s\n", msg); | |
217 | /* | |
41ccfdd9 | 218 | * A conflict has occurred but the porcelain |
043a4492 RR |
219 | * (typically rebase --interactive) wants to take care |
220 | * of the commit itself so remove CHERRY_PICK_HEAD | |
221 | */ | |
f932729c | 222 | unlink(git_path_cherry_pick_head()); |
043a4492 RR |
223 | return; |
224 | } | |
225 | ||
ed727b19 PH |
226 | if (show_hint) { |
227 | if (opts->no_commit) | |
228 | advise(_("after resolving the conflicts, mark the corrected paths\n" | |
229 | "with 'git add <paths>' or 'git rm <paths>'")); | |
230 | else | |
231 | advise(_("after resolving the conflicts, mark the corrected paths\n" | |
232 | "with 'git add <paths>' or 'git rm <paths>'\n" | |
233 | "and commit the result with 'git commit'")); | |
234 | } | |
043a4492 RR |
235 | } |
236 | ||
4ef3d8f0 | 237 | static int write_message(struct strbuf *msgbuf, const char *filename) |
043a4492 RR |
238 | { |
239 | static struct lock_file msg_file; | |
240 | ||
4ef3d8f0 JS |
241 | int msg_fd = hold_lock_file_for_update(&msg_file, filename, 0); |
242 | if (msg_fd < 0) | |
243 | return error_errno(_("Could not lock '%s'"), filename); | |
043a4492 | 244 | if (write_in_full(msg_fd, msgbuf->buf, msgbuf->len) < 0) |
4ef3d8f0 | 245 | return error_errno(_("Could not write to %s"), filename); |
043a4492 RR |
246 | strbuf_release(msgbuf); |
247 | if (commit_lock_file(&msg_file) < 0) | |
4ef3d8f0 JS |
248 | return error(_("Error wrapping up %s."), filename); |
249 | ||
250 | return 0; | |
043a4492 RR |
251 | } |
252 | ||
1dfc84e9 JS |
253 | /* |
254 | * Reads a file that was presumably written by a shell script, i.e. with an | |
255 | * end-of-line marker that needs to be stripped. | |
256 | * | |
257 | * Note that only the last end-of-line marker is stripped, consistent with the | |
258 | * behavior of "$(cat path)" in a shell script. | |
259 | * | |
260 | * Returns 1 if the file was read, 0 if it could not be read or does not exist. | |
261 | */ | |
262 | static int read_oneliner(struct strbuf *buf, | |
263 | const char *path, int skip_if_empty) | |
264 | { | |
265 | int orig_len = buf->len; | |
266 | ||
267 | if (!file_exists(path)) | |
268 | return 0; | |
269 | ||
270 | if (strbuf_read_file(buf, path, 0) < 0) { | |
271 | warning_errno(_("could not read '%s'"), path); | |
272 | return 0; | |
273 | } | |
274 | ||
275 | if (buf->len > orig_len && buf->buf[buf->len - 1] == '\n') { | |
276 | if (--buf->len > orig_len && buf->buf[buf->len - 1] == '\r') | |
277 | --buf->len; | |
278 | buf->buf[buf->len] = '\0'; | |
279 | } | |
280 | ||
281 | if (skip_if_empty && buf->len == orig_len) | |
282 | return 0; | |
283 | ||
284 | return 1; | |
285 | } | |
286 | ||
043a4492 RR |
287 | static struct tree *empty_tree(void) |
288 | { | |
cba595bd | 289 | return lookup_tree(EMPTY_TREE_SHA1_BIN); |
043a4492 RR |
290 | } |
291 | ||
292 | static int error_dirty_index(struct replay_opts *opts) | |
293 | { | |
294 | if (read_cache_unmerged()) | |
295 | return error_resolve_conflict(action_name(opts)); | |
296 | ||
e635d5ce JS |
297 | error(_("Your local changes would be overwritten by %s."), |
298 | action_name(opts)); | |
043a4492 RR |
299 | |
300 | if (advice_commit_before_merge) | |
301 | advise(_("Commit your changes or stash them to proceed.")); | |
302 | return -1; | |
303 | } | |
304 | ||
334ae397 | 305 | static int fast_forward_to(const unsigned char *to, const unsigned char *from, |
eb4be1cb | 306 | int unborn, struct replay_opts *opts) |
043a4492 | 307 | { |
d668d16c | 308 | struct ref_transaction *transaction; |
eb4be1cb | 309 | struct strbuf sb = STRBUF_INIT; |
d668d16c | 310 | struct strbuf err = STRBUF_INIT; |
043a4492 RR |
311 | |
312 | read_cache(); | |
db699a8a | 313 | if (checkout_fast_forward(from, to, 1)) |
0e408fc3 | 314 | return -1; /* the callee should have complained already */ |
651ab9f5 | 315 | |
e8d7c390 | 316 | strbuf_addf(&sb, _("%s: fast-forward"), action_name(opts)); |
d668d16c RS |
317 | |
318 | transaction = ref_transaction_begin(&err); | |
319 | if (!transaction || | |
320 | ref_transaction_update(transaction, "HEAD", | |
321 | to, unborn ? null_sha1 : from, | |
1d147bdf | 322 | 0, sb.buf, &err) || |
db7516ab | 323 | ref_transaction_commit(transaction, &err)) { |
d668d16c RS |
324 | ref_transaction_free(transaction); |
325 | error("%s", err.buf); | |
326 | strbuf_release(&sb); | |
327 | strbuf_release(&err); | |
328 | return -1; | |
329 | } | |
651ab9f5 | 330 | |
eb4be1cb | 331 | strbuf_release(&sb); |
d668d16c RS |
332 | strbuf_release(&err); |
333 | ref_transaction_free(transaction); | |
334 | return 0; | |
043a4492 RR |
335 | } |
336 | ||
75c961b7 JH |
337 | void append_conflicts_hint(struct strbuf *msgbuf) |
338 | { | |
339 | int i; | |
340 | ||
261f315b JH |
341 | strbuf_addch(msgbuf, '\n'); |
342 | strbuf_commented_addf(msgbuf, "Conflicts:\n"); | |
75c961b7 JH |
343 | for (i = 0; i < active_nr;) { |
344 | const struct cache_entry *ce = active_cache[i++]; | |
345 | if (ce_stage(ce)) { | |
261f315b | 346 | strbuf_commented_addf(msgbuf, "\t%s\n", ce->name); |
75c961b7 JH |
347 | while (i < active_nr && !strcmp(ce->name, |
348 | active_cache[i]->name)) | |
349 | i++; | |
350 | } | |
351 | } | |
352 | } | |
353 | ||
043a4492 RR |
354 | static int do_recursive_merge(struct commit *base, struct commit *next, |
355 | const char *base_label, const char *next_label, | |
356 | unsigned char *head, struct strbuf *msgbuf, | |
357 | struct replay_opts *opts) | |
358 | { | |
359 | struct merge_options o; | |
360 | struct tree *result, *next_tree, *base_tree, *head_tree; | |
03b86647 | 361 | int clean; |
03a4e260 | 362 | char **xopt; |
043a4492 RR |
363 | static struct lock_file index_lock; |
364 | ||
03b86647 | 365 | hold_locked_index(&index_lock, 1); |
043a4492 RR |
366 | |
367 | read_cache(); | |
368 | ||
369 | init_merge_options(&o); | |
370 | o.ancestor = base ? base_label : "(empty tree)"; | |
371 | o.branch1 = "HEAD"; | |
372 | o.branch2 = next ? next_label : "(empty tree)"; | |
373 | ||
374 | head_tree = parse_tree_indirect(head); | |
375 | next_tree = next ? next->tree : empty_tree(); | |
376 | base_tree = base ? base->tree : empty_tree(); | |
377 | ||
378 | for (xopt = opts->xopts; xopt != opts->xopts + opts->xopts_nr; xopt++) | |
379 | parse_merge_opt(&o, *xopt); | |
380 | ||
381 | clean = merge_trees(&o, | |
382 | head_tree, | |
383 | next_tree, base_tree, &result); | |
548009c0 | 384 | strbuf_release(&o.obuf); |
f241ff0d JS |
385 | if (clean < 0) |
386 | return clean; | |
043a4492 RR |
387 | |
388 | if (active_cache_changed && | |
03b86647 | 389 | write_locked_index(&the_index, &index_lock, COMMIT_LOCK)) |
043a4492 | 390 | /* TRANSLATORS: %s will be "revert" or "cherry-pick" */ |
c527b55e JS |
391 | return error(_("%s: Unable to write new index file"), |
392 | action_name(opts)); | |
043a4492 RR |
393 | rollback_lock_file(&index_lock); |
394 | ||
5ed75e2a | 395 | if (opts->signoff) |
bab4d109 | 396 | append_signoff(msgbuf, 0, 0); |
5ed75e2a | 397 | |
75c961b7 JH |
398 | if (!clean) |
399 | append_conflicts_hint(msgbuf); | |
043a4492 RR |
400 | |
401 | return !clean; | |
402 | } | |
403 | ||
b27cfb0d NH |
404 | static int is_index_unchanged(void) |
405 | { | |
406 | unsigned char head_sha1[20]; | |
407 | struct commit *head_commit; | |
408 | ||
7695d118 | 409 | if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, head_sha1, NULL)) |
b27cfb0d NH |
410 | return error(_("Could not resolve HEAD commit\n")); |
411 | ||
412 | head_commit = lookup_commit(head_sha1); | |
4b580061 NH |
413 | |
414 | /* | |
415 | * If head_commit is NULL, check_commit, called from | |
416 | * lookup_commit, would have indicated that head_commit is not | |
417 | * a commit object already. parse_commit() will return failure | |
418 | * without further complaints in such a case. Otherwise, if | |
419 | * the commit is invalid, parse_commit() will complain. So | |
420 | * there is nothing for us to say here. Just return failure. | |
421 | */ | |
422 | if (parse_commit(head_commit)) | |
423 | return -1; | |
b27cfb0d NH |
424 | |
425 | if (!active_cache_tree) | |
426 | active_cache_tree = cache_tree(); | |
427 | ||
428 | if (!cache_tree_fully_valid(active_cache_tree)) | |
d0cfc3e8 | 429 | if (cache_tree_update(&the_index, 0)) |
b27cfb0d NH |
430 | return error(_("Unable to update cache tree\n")); |
431 | ||
ed1c9977 | 432 | return !hashcmp(active_cache_tree->sha1, head_commit->tree->object.oid.hash); |
b27cfb0d NH |
433 | } |
434 | ||
b5a67045 JS |
435 | /* |
436 | * Read the author-script file into an environment block, ready for use in | |
437 | * run_command(), that can be free()d afterwards. | |
438 | */ | |
439 | static char **read_author_script(void) | |
440 | { | |
441 | struct strbuf script = STRBUF_INIT; | |
442 | int i, count = 0; | |
443 | char *p, *p2, **env; | |
444 | size_t env_size; | |
445 | ||
446 | if (strbuf_read_file(&script, rebase_path_author_script(), 256) <= 0) | |
447 | return NULL; | |
448 | ||
449 | for (p = script.buf; *p; p++) | |
450 | if (skip_prefix(p, "'\\\\''", (const char **)&p2)) | |
451 | strbuf_splice(&script, p - script.buf, p2 - p, "'", 1); | |
452 | else if (*p == '\'') | |
453 | strbuf_splice(&script, p-- - script.buf, 1, "", 0); | |
454 | else if (*p == '\n') { | |
455 | *p = '\0'; | |
456 | count++; | |
457 | } | |
458 | ||
459 | env_size = (count + 1) * sizeof(*env); | |
460 | strbuf_grow(&script, env_size); | |
461 | memmove(script.buf + env_size, script.buf, script.len); | |
462 | p = script.buf + env_size; | |
463 | env = (char **)strbuf_detach(&script, NULL); | |
464 | ||
465 | for (i = 0; i < count; i++) { | |
466 | env[i] = p; | |
467 | p += strlen(p) + 1; | |
468 | } | |
469 | env[count] = NULL; | |
470 | ||
471 | return env; | |
472 | } | |
473 | ||
043a4492 RR |
474 | /* |
475 | * If we are cherry-pick, and if the merge did not result in | |
476 | * hand-editing, we will hit this commit and inherit the original | |
477 | * author date and name. | |
b5a67045 | 478 | * |
043a4492 RR |
479 | * If we are revert, or if our cherry-pick results in a hand merge, |
480 | * we had better say that the current user is responsible for that. | |
b5a67045 JS |
481 | * |
482 | * An exception is when run_git_commit() is called during an | |
483 | * interactive rebase: in that case, we will want to retain the | |
484 | * author metadata. | |
043a4492 | 485 | */ |
ac2b0e8f | 486 | static int run_git_commit(const char *defmsg, struct replay_opts *opts, |
a1c75762 | 487 | int allow_empty, int edit) |
043a4492 | 488 | { |
b5a67045 | 489 | char **env = NULL; |
b27cfb0d NH |
490 | struct argv_array array; |
491 | int rc; | |
17d65f03 | 492 | const char *value; |
b27cfb0d | 493 | |
b5a67045 JS |
494 | if (is_rebase_i(opts)) { |
495 | env = read_author_script(); | |
a1c75762 JS |
496 | if (!env) { |
497 | const char *gpg_opt = gpg_sign_opt_quoted(opts); | |
498 | ||
b5a67045 JS |
499 | return error("You have staged changes in your working " |
500 | "tree. If these changes are meant to be\n" | |
501 | "squashed into the previous commit, run:\n\n" | |
a1c75762 | 502 | " git commit --amend %s\n\n" |
b5a67045 JS |
503 | "If they are meant to go into a new commit, " |
504 | "run:\n\n" | |
a1c75762 | 505 | " git commit %s\n\n" |
b5a67045 JS |
506 | "In both cases, once you're done, continue " |
507 | "with:\n\n" | |
a1c75762 JS |
508 | " git rebase --continue\n", gpg_opt, gpg_opt); |
509 | } | |
b5a67045 JS |
510 | } |
511 | ||
b27cfb0d NH |
512 | argv_array_init(&array); |
513 | argv_array_push(&array, "commit"); | |
514 | argv_array_push(&array, "-n"); | |
043a4492 | 515 | |
3bdd5522 JK |
516 | if (opts->gpg_sign) |
517 | argv_array_pushf(&array, "-S%s", opts->gpg_sign); | |
043a4492 | 518 | if (opts->signoff) |
b27cfb0d | 519 | argv_array_push(&array, "-s"); |
b5a67045 JS |
520 | if (defmsg) |
521 | argv_array_pushl(&array, "-F", defmsg, NULL); | |
a1c75762 | 522 | if (edit) |
b5a67045 JS |
523 | argv_array_push(&array, "-e"); |
524 | else if (!opts->signoff && !opts->record_origin && | |
525 | git_config_get_value("commit.cleanup", &value)) | |
526 | argv_array_push(&array, "--cleanup=verbatim"); | |
b27cfb0d | 527 | |
ac2b0e8f | 528 | if (allow_empty) |
b27cfb0d | 529 | argv_array_push(&array, "--allow-empty"); |
df478b74 | 530 | |
4bee9584 CW |
531 | if (opts->allow_empty_message) |
532 | argv_array_push(&array, "--allow-empty-message"); | |
533 | ||
b5a67045 JS |
534 | rc = run_command_v_opt_cd_env(array.argv, RUN_GIT_CMD, NULL, |
535 | (const char *const *)env); | |
b27cfb0d | 536 | argv_array_clear(&array); |
b5a67045 JS |
537 | free(env); |
538 | ||
b27cfb0d NH |
539 | return rc; |
540 | } | |
541 | ||
542 | static int is_original_commit_empty(struct commit *commit) | |
543 | { | |
544 | const unsigned char *ptree_sha1; | |
545 | ||
546 | if (parse_commit(commit)) | |
547 | return error(_("Could not parse commit %s\n"), | |
f2fd0760 | 548 | oid_to_hex(&commit->object.oid)); |
b27cfb0d NH |
549 | if (commit->parents) { |
550 | struct commit *parent = commit->parents->item; | |
551 | if (parse_commit(parent)) | |
552 | return error(_("Could not parse parent commit %s\n"), | |
f2fd0760 | 553 | oid_to_hex(&parent->object.oid)); |
ed1c9977 | 554 | ptree_sha1 = parent->tree->object.oid.hash; |
b27cfb0d NH |
555 | } else { |
556 | ptree_sha1 = EMPTY_TREE_SHA1_BIN; /* commit is root */ | |
043a4492 | 557 | } |
043a4492 | 558 | |
ed1c9977 | 559 | return !hashcmp(ptree_sha1, commit->tree->object.oid.hash); |
043a4492 RR |
560 | } |
561 | ||
ac2b0e8f JH |
562 | /* |
563 | * Do we run "git commit" with "--allow-empty"? | |
564 | */ | |
565 | static int allow_empty(struct replay_opts *opts, struct commit *commit) | |
566 | { | |
567 | int index_unchanged, empty_commit; | |
568 | ||
569 | /* | |
570 | * Three cases: | |
571 | * | |
572 | * (1) we do not allow empty at all and error out. | |
573 | * | |
574 | * (2) we allow ones that were initially empty, but | |
575 | * forbid the ones that become empty; | |
576 | * | |
577 | * (3) we allow both. | |
578 | */ | |
579 | if (!opts->allow_empty) | |
580 | return 0; /* let "git commit" barf as necessary */ | |
581 | ||
582 | index_unchanged = is_index_unchanged(); | |
583 | if (index_unchanged < 0) | |
584 | return index_unchanged; | |
585 | if (!index_unchanged) | |
586 | return 0; /* we do not have to say --allow-empty */ | |
587 | ||
588 | if (opts->keep_redundant_commits) | |
589 | return 1; | |
590 | ||
591 | empty_commit = is_original_commit_empty(commit); | |
592 | if (empty_commit < 0) | |
593 | return empty_commit; | |
594 | if (!empty_commit) | |
595 | return 0; | |
596 | else | |
597 | return 1; | |
598 | } | |
599 | ||
004fefa7 JS |
600 | enum todo_command { |
601 | TODO_PICK = 0, | |
602 | TODO_REVERT | |
603 | }; | |
604 | ||
605 | static const char *todo_command_strings[] = { | |
606 | "pick", | |
607 | "revert" | |
608 | }; | |
609 | ||
610 | static const char *command_to_string(const enum todo_command command) | |
611 | { | |
612 | if (command < ARRAY_SIZE(todo_command_strings)) | |
613 | return todo_command_strings[command]; | |
614 | die("Unknown command: %d", command); | |
615 | } | |
616 | ||
617 | ||
618 | static int do_pick_commit(enum todo_command command, struct commit *commit, | |
619 | struct replay_opts *opts) | |
043a4492 RR |
620 | { |
621 | unsigned char head[20]; | |
622 | struct commit *base, *next, *parent; | |
623 | const char *base_label, *next_label; | |
d74a4e57 | 624 | struct commit_message msg = { NULL, NULL, NULL, NULL }; |
043a4492 | 625 | struct strbuf msgbuf = STRBUF_INIT; |
c8d1351d | 626 | int res, unborn = 0, allow; |
043a4492 RR |
627 | |
628 | if (opts->no_commit) { | |
629 | /* | |
630 | * We do not intend to commit immediately. We just want to | |
631 | * merge the differences in, so let's compute the tree | |
632 | * that represents the "current" state for merge-recursive | |
633 | * to work on. | |
634 | */ | |
635 | if (write_cache_as_tree(head, 0, NULL)) | |
f74087f6 | 636 | return error(_("Your index file is unmerged.")); |
043a4492 | 637 | } else { |
334ae397 MZ |
638 | unborn = get_sha1("HEAD", head); |
639 | if (unborn) | |
640 | hashcpy(head, EMPTY_TREE_SHA1_BIN); | |
641 | if (index_differs_from(unborn ? EMPTY_TREE_SHA1_HEX : "HEAD", 0)) | |
043a4492 RR |
642 | return error_dirty_index(opts); |
643 | } | |
644 | discard_cache(); | |
645 | ||
646 | if (!commit->parents) { | |
647 | parent = NULL; | |
648 | } | |
649 | else if (commit->parents->next) { | |
650 | /* Reverting or cherry-picking a merge commit */ | |
651 | int cnt; | |
652 | struct commit_list *p; | |
653 | ||
654 | if (!opts->mainline) | |
655 | return error(_("Commit %s is a merge but no -m option was given."), | |
f2fd0760 | 656 | oid_to_hex(&commit->object.oid)); |
043a4492 RR |
657 | |
658 | for (cnt = 1, p = commit->parents; | |
659 | cnt != opts->mainline && p; | |
660 | cnt++) | |
661 | p = p->next; | |
662 | if (cnt != opts->mainline || !p) | |
663 | return error(_("Commit %s does not have parent %d"), | |
f2fd0760 | 664 | oid_to_hex(&commit->object.oid), opts->mainline); |
043a4492 RR |
665 | parent = p->item; |
666 | } else if (0 < opts->mainline) | |
667 | return error(_("Mainline was specified but commit %s is not a merge."), | |
f2fd0760 | 668 | oid_to_hex(&commit->object.oid)); |
043a4492 RR |
669 | else |
670 | parent = commit->parents->item; | |
671 | ||
334ae397 | 672 | if (opts->allow_ff && |
ed1c9977 | 673 | ((parent && !hashcmp(parent->object.oid.hash, head)) || |
334ae397 | 674 | (!parent && unborn))) |
ed1c9977 | 675 | return fast_forward_to(commit->object.oid.hash, head, unborn, opts); |
043a4492 RR |
676 | |
677 | if (parent && parse_commit(parent) < 0) | |
004fefa7 JS |
678 | /* TRANSLATORS: The first %s will be a "todo" command like |
679 | "revert" or "pick", the second %s a SHA1. */ | |
043a4492 | 680 | return error(_("%s: cannot parse parent commit %s"), |
004fefa7 JS |
681 | command_to_string(command), |
682 | oid_to_hex(&parent->object.oid)); | |
043a4492 RR |
683 | |
684 | if (get_message(commit, &msg) != 0) | |
685 | return error(_("Cannot get commit message for %s"), | |
f2fd0760 | 686 | oid_to_hex(&commit->object.oid)); |
043a4492 RR |
687 | |
688 | /* | |
689 | * "commit" is an existing commit. We would want to apply | |
690 | * the difference it introduces since its first parent "prev" | |
691 | * on top of the current HEAD if we are cherry-pick. Or the | |
692 | * reverse of it if we are revert. | |
693 | */ | |
694 | ||
004fefa7 | 695 | if (command == TODO_REVERT) { |
043a4492 RR |
696 | base = commit; |
697 | base_label = msg.label; | |
698 | next = parent; | |
699 | next_label = msg.parent_label; | |
700 | strbuf_addstr(&msgbuf, "Revert \""); | |
701 | strbuf_addstr(&msgbuf, msg.subject); | |
702 | strbuf_addstr(&msgbuf, "\"\n\nThis reverts commit "); | |
f2fd0760 | 703 | strbuf_addstr(&msgbuf, oid_to_hex(&commit->object.oid)); |
043a4492 RR |
704 | |
705 | if (commit->parents && commit->parents->next) { | |
706 | strbuf_addstr(&msgbuf, ", reversing\nchanges made to "); | |
f2fd0760 | 707 | strbuf_addstr(&msgbuf, oid_to_hex(&parent->object.oid)); |
043a4492 RR |
708 | } |
709 | strbuf_addstr(&msgbuf, ".\n"); | |
710 | } else { | |
711 | const char *p; | |
712 | ||
713 | base = parent; | |
714 | base_label = msg.parent_label; | |
715 | next = commit; | |
716 | next_label = msg.label; | |
717 | ||
718 | /* | |
719 | * Append the commit log message to msgbuf; it starts | |
720 | * after the tree, parent, author, committer | |
721 | * information followed by "\n\n". | |
722 | */ | |
723 | p = strstr(msg.message, "\n\n"); | |
88ef402f JS |
724 | if (p) |
725 | strbuf_addstr(&msgbuf, skip_blank_lines(p + 2)); | |
043a4492 RR |
726 | |
727 | if (opts->record_origin) { | |
bab4d109 | 728 | if (!has_conforming_footer(&msgbuf, NULL, 0)) |
b971e04f | 729 | strbuf_addch(&msgbuf, '\n'); |
cd650a4e | 730 | strbuf_addstr(&msgbuf, cherry_picked_prefix); |
f2fd0760 | 731 | strbuf_addstr(&msgbuf, oid_to_hex(&commit->object.oid)); |
043a4492 RR |
732 | strbuf_addstr(&msgbuf, ")\n"); |
733 | } | |
734 | } | |
735 | ||
004fefa7 | 736 | if (!opts->strategy || !strcmp(opts->strategy, "recursive") || command == TODO_REVERT) { |
043a4492 RR |
737 | res = do_recursive_merge(base, next, base_label, next_label, |
738 | head, &msgbuf, opts); | |
f241ff0d JS |
739 | if (res < 0) |
740 | return res; | |
4ef3d8f0 | 741 | res |= write_message(&msgbuf, git_path_merge_msg()); |
043a4492 RR |
742 | } else { |
743 | struct commit_list *common = NULL; | |
744 | struct commit_list *remotes = NULL; | |
745 | ||
4ef3d8f0 | 746 | res = write_message(&msgbuf, git_path_merge_msg()); |
043a4492 RR |
747 | |
748 | commit_list_insert(base, &common); | |
749 | commit_list_insert(next, &remotes); | |
03a4e260 JS |
750 | res |= try_merge_command(opts->strategy, |
751 | opts->xopts_nr, (const char **)opts->xopts, | |
043a4492 RR |
752 | common, sha1_to_hex(head), remotes); |
753 | free_commit_list(common); | |
754 | free_commit_list(remotes); | |
755 | } | |
756 | ||
757 | /* | |
758 | * If the merge was clean or if it failed due to conflict, we write | |
759 | * CHERRY_PICK_HEAD for the subsequent invocation of commit to use. | |
760 | * However, if the merge did not even start, then we don't want to | |
761 | * write it at all. | |
762 | */ | |
004fefa7 | 763 | if (command == TODO_PICK && !opts->no_commit && (res == 0 || res == 1) && |
dbfad033 JS |
764 | update_ref(NULL, "CHERRY_PICK_HEAD", commit->object.oid.hash, NULL, |
765 | REF_NODEREF, UPDATE_REFS_MSG_ON_ERR)) | |
766 | res = -1; | |
004fefa7 | 767 | if (command == TODO_REVERT && ((opts->no_commit && res == 0) || res == 1) && |
dbfad033 JS |
768 | update_ref(NULL, "REVERT_HEAD", commit->object.oid.hash, NULL, |
769 | REF_NODEREF, UPDATE_REFS_MSG_ON_ERR)) | |
770 | res = -1; | |
043a4492 RR |
771 | |
772 | if (res) { | |
004fefa7 | 773 | error(command == TODO_REVERT |
043a4492 RR |
774 | ? _("could not revert %s... %s") |
775 | : _("could not apply %s... %s"), | |
39755964 | 776 | short_commit_name(commit), msg.subject); |
ed727b19 | 777 | print_advice(res == 1, opts); |
043a4492 | 778 | rerere(opts->allow_rerere_auto); |
c8d1351d | 779 | goto leave; |
043a4492 RR |
780 | } |
781 | ||
c8d1351d | 782 | allow = allow_empty(opts, commit); |
706728a3 FC |
783 | if (allow < 0) { |
784 | res = allow; | |
785 | goto leave; | |
786 | } | |
c8d1351d | 787 | if (!opts->no_commit) |
b5a67045 | 788 | res = run_git_commit(opts->edit ? NULL : git_path_merge_msg(), |
a1c75762 | 789 | opts, allow, opts->edit); |
c8d1351d FC |
790 | |
791 | leave: | |
d74a4e57 | 792 | free_message(commit, &msg); |
043a4492 RR |
793 | |
794 | return res; | |
795 | } | |
796 | ||
c3e8618c | 797 | static int prepare_revs(struct replay_opts *opts) |
043a4492 | 798 | { |
a73e22e9 MZ |
799 | /* |
800 | * picking (but not reverting) ranges (but not individual revisions) | |
801 | * should be done in reverse | |
802 | */ | |
803 | if (opts->action == REPLAY_PICK && !opts->revs->no_walk) | |
043a4492 RR |
804 | opts->revs->reverse ^= 1; |
805 | ||
806 | if (prepare_revision_walk(opts->revs)) | |
c3e8618c | 807 | return error(_("revision walk setup failed")); |
043a4492 RR |
808 | |
809 | if (!opts->revs->commits) | |
c3e8618c JS |
810 | return error(_("empty commit set passed")); |
811 | return 0; | |
043a4492 RR |
812 | } |
813 | ||
0d9c6dc9 | 814 | static int read_and_refresh_cache(struct replay_opts *opts) |
043a4492 RR |
815 | { |
816 | static struct lock_file index_lock; | |
817 | int index_fd = hold_locked_index(&index_lock, 0); | |
49fb937e JS |
818 | if (read_index_preload(&the_index, NULL) < 0) { |
819 | rollback_lock_file(&index_lock); | |
0d9c6dc9 JS |
820 | return error(_("git %s: failed to read the index"), |
821 | action_name(opts)); | |
49fb937e | 822 | } |
043a4492 | 823 | refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, NULL, NULL, NULL); |
33c297aa | 824 | if (the_index.cache_changed && index_fd >= 0) { |
49fb937e JS |
825 | if (write_locked_index(&the_index, &index_lock, COMMIT_LOCK)) { |
826 | rollback_lock_file(&index_lock); | |
0d9c6dc9 JS |
827 | return error(_("git %s: failed to refresh the index"), |
828 | action_name(opts)); | |
49fb937e | 829 | } |
043a4492 RR |
830 | } |
831 | rollback_lock_file(&index_lock); | |
0d9c6dc9 | 832 | return 0; |
043a4492 RR |
833 | } |
834 | ||
004fefa7 JS |
835 | struct todo_item { |
836 | enum todo_command command; | |
837 | struct commit *commit; | |
c22f7dfb JS |
838 | const char *arg; |
839 | int arg_len; | |
004fefa7 JS |
840 | size_t offset_in_buf; |
841 | }; | |
842 | ||
843 | struct todo_list { | |
844 | struct strbuf buf; | |
845 | struct todo_item *items; | |
846 | int nr, alloc, current; | |
847 | }; | |
848 | ||
849 | #define TODO_LIST_INIT { STRBUF_INIT } | |
850 | ||
851 | static void todo_list_release(struct todo_list *todo_list) | |
043a4492 | 852 | { |
004fefa7 JS |
853 | strbuf_release(&todo_list->buf); |
854 | free(todo_list->items); | |
855 | todo_list->items = NULL; | |
856 | todo_list->nr = todo_list->alloc = 0; | |
857 | } | |
043a4492 | 858 | |
004fefa7 JS |
859 | static struct todo_item *append_new_todo(struct todo_list *todo_list) |
860 | { | |
861 | ALLOC_GROW(todo_list->items, todo_list->nr + 1, todo_list->alloc); | |
862 | return todo_list->items + todo_list->nr++; | |
043a4492 RR |
863 | } |
864 | ||
004fefa7 | 865 | static int parse_insn_line(struct todo_item *item, const char *bol, char *eol) |
043a4492 RR |
866 | { |
867 | unsigned char commit_sha1[20]; | |
043a4492 | 868 | char *end_of_object_name; |
004fefa7 JS |
869 | int i, saved, status, padding; |
870 | ||
871 | for (i = 0; i < ARRAY_SIZE(todo_command_strings); i++) | |
872 | if (skip_prefix(bol, todo_command_strings[i], &bol)) { | |
873 | item->command = i; | |
874 | break; | |
875 | } | |
876 | if (i >= ARRAY_SIZE(todo_command_strings)) | |
877 | return -1; | |
043a4492 RR |
878 | |
879 | /* Eat up extra spaces/ tabs before object name */ | |
880 | padding = strspn(bol, " \t"); | |
881 | if (!padding) | |
004fefa7 | 882 | return -1; |
043a4492 RR |
883 | bol += padding; |
884 | ||
004fefa7 | 885 | end_of_object_name = (char *) bol + strcspn(bol, " \t\n"); |
043a4492 RR |
886 | saved = *end_of_object_name; |
887 | *end_of_object_name = '\0'; | |
888 | status = get_sha1(bol, commit_sha1); | |
889 | *end_of_object_name = saved; | |
890 | ||
c22f7dfb JS |
891 | item->arg = end_of_object_name + strspn(end_of_object_name, " \t"); |
892 | item->arg_len = (int)(eol - item->arg); | |
893 | ||
043a4492 | 894 | if (status < 0) |
004fefa7 | 895 | return -1; |
043a4492 | 896 | |
004fefa7 JS |
897 | item->commit = lookup_commit_reference(commit_sha1); |
898 | return !item->commit; | |
043a4492 RR |
899 | } |
900 | ||
004fefa7 | 901 | static int parse_insn_buffer(char *buf, struct todo_list *todo_list) |
043a4492 | 902 | { |
004fefa7 JS |
903 | struct todo_item *item; |
904 | char *p = buf, *next_p; | |
905 | int i, res = 0; | |
043a4492 | 906 | |
004fefa7 | 907 | for (i = 1; *p; i++, p = next_p) { |
043a4492 | 908 | char *eol = strchrnul(p, '\n'); |
004fefa7 JS |
909 | |
910 | next_p = *eol ? eol + 1 /* skip LF */ : eol; | |
911 | ||
6307041d JS |
912 | if (p != eol && eol[-1] == '\r') |
913 | eol--; /* strip Carriage Return */ | |
914 | ||
004fefa7 JS |
915 | item = append_new_todo(todo_list); |
916 | item->offset_in_buf = p - todo_list->buf.buf; | |
917 | if (parse_insn_line(item, p, eol)) { | |
918 | res = error(_("Invalid line %d: %.*s"), | |
919 | i, (int)(eol - p), p); | |
920 | item->command = -1; | |
921 | } | |
043a4492 | 922 | } |
004fefa7 | 923 | if (!todo_list->nr) |
043a4492 | 924 | return error(_("No commits parsed.")); |
004fefa7 | 925 | return res; |
043a4492 RR |
926 | } |
927 | ||
004fefa7 | 928 | static int read_populate_todo(struct todo_list *todo_list, |
043a4492 RR |
929 | struct replay_opts *opts) |
930 | { | |
c0246501 | 931 | const char *todo_file = get_todo_path(opts); |
043a4492 RR |
932 | int fd, res; |
933 | ||
004fefa7 | 934 | strbuf_reset(&todo_list->buf); |
c0246501 | 935 | fd = open(todo_file, O_RDONLY); |
043a4492 | 936 | if (fd < 0) |
c0246501 | 937 | return error_errno(_("Could not open %s"), todo_file); |
004fefa7 | 938 | if (strbuf_read(&todo_list->buf, fd, 0) < 0) { |
043a4492 | 939 | close(fd); |
c0246501 | 940 | return error(_("Could not read %s."), todo_file); |
043a4492 RR |
941 | } |
942 | close(fd); | |
943 | ||
004fefa7 JS |
944 | res = parse_insn_buffer(todo_list->buf.buf, todo_list); |
945 | if (!res) { | |
946 | enum todo_command valid = | |
947 | opts->action == REPLAY_PICK ? TODO_PICK : TODO_REVERT; | |
948 | int i; | |
949 | ||
950 | for (i = 0; i < todo_list->nr; i++) | |
951 | if (valid == todo_list->items[i].command) | |
952 | continue; | |
953 | else if (valid == TODO_PICK) | |
954 | return error(_("Cannot cherry-pick during a revert.")); | |
955 | else | |
956 | return error(_("Cannot revert during a cherry-pick.")); | |
957 | } | |
958 | ||
043a4492 | 959 | if (res) |
c0246501 | 960 | return error(_("Unusable instruction sheet: %s"), todo_file); |
0ae42a03 | 961 | return 0; |
043a4492 RR |
962 | } |
963 | ||
03a4e260 JS |
964 | static int git_config_string_dup(char **dest, |
965 | const char *var, const char *value) | |
966 | { | |
967 | if (!value) | |
968 | return config_error_nonbool(var); | |
969 | free(*dest); | |
970 | *dest = xstrdup(value); | |
971 | return 0; | |
972 | } | |
973 | ||
043a4492 RR |
974 | static int populate_opts_cb(const char *key, const char *value, void *data) |
975 | { | |
976 | struct replay_opts *opts = data; | |
977 | int error_flag = 1; | |
978 | ||
979 | if (!value) | |
980 | error_flag = 0; | |
981 | else if (!strcmp(key, "options.no-commit")) | |
982 | opts->no_commit = git_config_bool_or_int(key, value, &error_flag); | |
983 | else if (!strcmp(key, "options.edit")) | |
984 | opts->edit = git_config_bool_or_int(key, value, &error_flag); | |
985 | else if (!strcmp(key, "options.signoff")) | |
986 | opts->signoff = git_config_bool_or_int(key, value, &error_flag); | |
987 | else if (!strcmp(key, "options.record-origin")) | |
988 | opts->record_origin = git_config_bool_or_int(key, value, &error_flag); | |
989 | else if (!strcmp(key, "options.allow-ff")) | |
990 | opts->allow_ff = git_config_bool_or_int(key, value, &error_flag); | |
991 | else if (!strcmp(key, "options.mainline")) | |
992 | opts->mainline = git_config_int(key, value); | |
993 | else if (!strcmp(key, "options.strategy")) | |
03a4e260 | 994 | git_config_string_dup(&opts->strategy, key, value); |
3253553e | 995 | else if (!strcmp(key, "options.gpg-sign")) |
03a4e260 | 996 | git_config_string_dup(&opts->gpg_sign, key, value); |
043a4492 RR |
997 | else if (!strcmp(key, "options.strategy-option")) { |
998 | ALLOC_GROW(opts->xopts, opts->xopts_nr + 1, opts->xopts_alloc); | |
999 | opts->xopts[opts->xopts_nr++] = xstrdup(value); | |
1000 | } else | |
1001 | return error(_("Invalid key: %s"), key); | |
1002 | ||
1003 | if (!error_flag) | |
1004 | return error(_("Invalid value for %s: %s"), key, value); | |
1005 | ||
1006 | return 0; | |
1007 | } | |
1008 | ||
5adf9bdc | 1009 | static int read_populate_opts(struct replay_opts *opts) |
043a4492 | 1010 | { |
a1c75762 JS |
1011 | if (is_rebase_i(opts)) { |
1012 | struct strbuf buf = STRBUF_INIT; | |
1013 | ||
1014 | if (read_oneliner(&buf, rebase_path_gpg_sign_opt(), 1)) { | |
1015 | if (!starts_with(buf.buf, "-S")) | |
1016 | strbuf_reset(&buf); | |
1017 | else { | |
1018 | free(opts->gpg_sign); | |
1019 | opts->gpg_sign = xstrdup(buf.buf + 2); | |
1020 | } | |
1021 | } | |
1022 | strbuf_release(&buf); | |
1023 | ||
b5a67045 | 1024 | return 0; |
a1c75762 | 1025 | } |
b5a67045 | 1026 | |
f932729c | 1027 | if (!file_exists(git_path_opts_file())) |
0d00da7b JS |
1028 | return 0; |
1029 | /* | |
1030 | * The function git_parse_source(), called from git_config_from_file(), | |
1031 | * may die() in case of a syntactically incorrect file. We do not care | |
1032 | * about this case, though, because we wrote that file ourselves, so we | |
1033 | * are pretty certain that it is syntactically correct. | |
1034 | */ | |
5adf9bdc | 1035 | if (git_config_from_file(populate_opts_cb, git_path_opts_file(), opts) < 0) |
0d00da7b JS |
1036 | return error(_("Malformed options sheet: %s"), |
1037 | git_path_opts_file()); | |
1038 | return 0; | |
043a4492 RR |
1039 | } |
1040 | ||
004fefa7 | 1041 | static int walk_revs_populate_todo(struct todo_list *todo_list, |
043a4492 RR |
1042 | struct replay_opts *opts) |
1043 | { | |
004fefa7 JS |
1044 | enum todo_command command = opts->action == REPLAY_PICK ? |
1045 | TODO_PICK : TODO_REVERT; | |
1046 | const char *command_string = todo_command_strings[command]; | |
043a4492 | 1047 | struct commit *commit; |
043a4492 | 1048 | |
34b0528b JS |
1049 | if (prepare_revs(opts)) |
1050 | return -1; | |
043a4492 | 1051 | |
004fefa7 JS |
1052 | while ((commit = get_revision(opts->revs))) { |
1053 | struct todo_item *item = append_new_todo(todo_list); | |
1054 | const char *commit_buffer = get_commit_buffer(commit, NULL); | |
1055 | const char *subject; | |
1056 | int subject_len; | |
1057 | ||
1058 | item->command = command; | |
1059 | item->commit = commit; | |
c22f7dfb JS |
1060 | item->arg = NULL; |
1061 | item->arg_len = 0; | |
004fefa7 JS |
1062 | item->offset_in_buf = todo_list->buf.len; |
1063 | subject_len = find_commit_subject(commit_buffer, &subject); | |
1064 | strbuf_addf(&todo_list->buf, "%s %s %.*s\n", command_string, | |
1065 | short_commit_name(commit), subject_len, subject); | |
1066 | unuse_commit_buffer(commit, commit_buffer); | |
1067 | } | |
34b0528b | 1068 | return 0; |
043a4492 RR |
1069 | } |
1070 | ||
1071 | static int create_seq_dir(void) | |
1072 | { | |
f932729c | 1073 | if (file_exists(git_path_seq_dir())) { |
043a4492 RR |
1074 | error(_("a cherry-pick or revert is already in progress")); |
1075 | advise(_("try \"git cherry-pick (--continue | --quit | --abort)\"")); | |
1076 | return -1; | |
1077 | } | |
f932729c | 1078 | else if (mkdir(git_path_seq_dir(), 0777) < 0) |
f6e82b0d JS |
1079 | return error_errno(_("Could not create sequencer directory %s"), |
1080 | git_path_seq_dir()); | |
043a4492 RR |
1081 | return 0; |
1082 | } | |
1083 | ||
311fd397 | 1084 | static int save_head(const char *head) |
043a4492 | 1085 | { |
043a4492 RR |
1086 | static struct lock_file head_lock; |
1087 | struct strbuf buf = STRBUF_INIT; | |
1088 | int fd; | |
1089 | ||
311fd397 JS |
1090 | fd = hold_lock_file_for_update(&head_lock, git_path_head_file(), 0); |
1091 | if (fd < 0) { | |
1092 | rollback_lock_file(&head_lock); | |
1093 | return error_errno(_("Could not lock HEAD")); | |
1094 | } | |
043a4492 | 1095 | strbuf_addf(&buf, "%s\n", head); |
311fd397 JS |
1096 | if (write_in_full(fd, buf.buf, buf.len) < 0) { |
1097 | rollback_lock_file(&head_lock); | |
1098 | return error_errno(_("Could not write to %s"), | |
1099 | git_path_head_file()); | |
1100 | } | |
1101 | if (commit_lock_file(&head_lock) < 0) { | |
1102 | rollback_lock_file(&head_lock); | |
1103 | return error(_("Error wrapping up %s."), git_path_head_file()); | |
1104 | } | |
1105 | return 0; | |
043a4492 RR |
1106 | } |
1107 | ||
1108 | static int reset_for_rollback(const unsigned char *sha1) | |
1109 | { | |
1110 | const char *argv[4]; /* reset --merge <arg> + NULL */ | |
1111 | argv[0] = "reset"; | |
1112 | argv[1] = "--merge"; | |
1113 | argv[2] = sha1_to_hex(sha1); | |
1114 | argv[3] = NULL; | |
1115 | return run_command_v_opt(argv, RUN_GIT_CMD); | |
1116 | } | |
1117 | ||
1118 | static int rollback_single_pick(void) | |
1119 | { | |
1120 | unsigned char head_sha1[20]; | |
1121 | ||
f932729c JK |
1122 | if (!file_exists(git_path_cherry_pick_head()) && |
1123 | !file_exists(git_path_revert_head())) | |
043a4492 | 1124 | return error(_("no cherry-pick or revert in progress")); |
7695d118 | 1125 | if (read_ref_full("HEAD", 0, head_sha1, NULL)) |
043a4492 RR |
1126 | return error(_("cannot resolve HEAD")); |
1127 | if (is_null_sha1(head_sha1)) | |
1128 | return error(_("cannot abort from a branch yet to be born")); | |
1129 | return reset_for_rollback(head_sha1); | |
1130 | } | |
1131 | ||
2863584f | 1132 | int sequencer_rollback(struct replay_opts *opts) |
043a4492 | 1133 | { |
043a4492 RR |
1134 | FILE *f; |
1135 | unsigned char sha1[20]; | |
1136 | struct strbuf buf = STRBUF_INIT; | |
1137 | ||
f932729c | 1138 | f = fopen(git_path_head_file(), "r"); |
043a4492 RR |
1139 | if (!f && errno == ENOENT) { |
1140 | /* | |
1141 | * There is no multiple-cherry-pick in progress. | |
1142 | * If CHERRY_PICK_HEAD or REVERT_HEAD indicates | |
1143 | * a single-cherry-pick in progress, abort that. | |
1144 | */ | |
1145 | return rollback_single_pick(); | |
1146 | } | |
1147 | if (!f) | |
6c979c74 | 1148 | return error_errno(_("cannot open %s"), git_path_head_file()); |
8f309aeb | 1149 | if (strbuf_getline_lf(&buf, f)) { |
f932729c JK |
1150 | error(_("cannot read %s: %s"), git_path_head_file(), |
1151 | ferror(f) ? strerror(errno) : _("unexpected end of file")); | |
043a4492 RR |
1152 | fclose(f); |
1153 | goto fail; | |
1154 | } | |
1155 | fclose(f); | |
1156 | if (get_sha1_hex(buf.buf, sha1) || buf.buf[40] != '\0') { | |
1157 | error(_("stored pre-cherry-pick HEAD file '%s' is corrupt"), | |
f932729c | 1158 | git_path_head_file()); |
043a4492 RR |
1159 | goto fail; |
1160 | } | |
0f974e21 MG |
1161 | if (is_null_sha1(sha1)) { |
1162 | error(_("cannot abort from a branch yet to be born")); | |
1163 | goto fail; | |
1164 | } | |
043a4492 RR |
1165 | if (reset_for_rollback(sha1)) |
1166 | goto fail; | |
043a4492 | 1167 | strbuf_release(&buf); |
2863584f | 1168 | return sequencer_remove_state(opts); |
043a4492 RR |
1169 | fail: |
1170 | strbuf_release(&buf); | |
1171 | return -1; | |
1172 | } | |
1173 | ||
004fefa7 | 1174 | static int save_todo(struct todo_list *todo_list, struct replay_opts *opts) |
043a4492 | 1175 | { |
043a4492 | 1176 | static struct lock_file todo_lock; |
004fefa7 JS |
1177 | const char *todo_path = get_todo_path(opts); |
1178 | int next = todo_list->current, offset, fd; | |
043a4492 | 1179 | |
004fefa7 | 1180 | fd = hold_lock_file_for_update(&todo_lock, todo_path, 0); |
221675de | 1181 | if (fd < 0) |
004fefa7 JS |
1182 | return error_errno(_("Could not lock '%s'"), todo_path); |
1183 | offset = next < todo_list->nr ? | |
1184 | todo_list->items[next].offset_in_buf : todo_list->buf.len; | |
1185 | if (write_in_full(fd, todo_list->buf.buf + offset, | |
1186 | todo_list->buf.len - offset) < 0) | |
1187 | return error_errno(_("Could not write to '%s'"), todo_path); | |
1188 | if (commit_lock_file(&todo_lock) < 0) | |
1189 | return error(_("Error wrapping up %s."), todo_path); | |
221675de | 1190 | return 0; |
043a4492 RR |
1191 | } |
1192 | ||
88d5a271 | 1193 | static int save_opts(struct replay_opts *opts) |
043a4492 | 1194 | { |
f932729c | 1195 | const char *opts_file = git_path_opts_file(); |
88d5a271 | 1196 | int res = 0; |
043a4492 RR |
1197 | |
1198 | if (opts->no_commit) | |
88d5a271 | 1199 | res |= git_config_set_in_file_gently(opts_file, "options.no-commit", "true"); |
043a4492 | 1200 | if (opts->edit) |
88d5a271 | 1201 | res |= git_config_set_in_file_gently(opts_file, "options.edit", "true"); |
043a4492 | 1202 | if (opts->signoff) |
88d5a271 | 1203 | res |= git_config_set_in_file_gently(opts_file, "options.signoff", "true"); |
043a4492 | 1204 | if (opts->record_origin) |
88d5a271 | 1205 | res |= git_config_set_in_file_gently(opts_file, "options.record-origin", "true"); |
043a4492 | 1206 | if (opts->allow_ff) |
88d5a271 | 1207 | res |= git_config_set_in_file_gently(opts_file, "options.allow-ff", "true"); |
043a4492 RR |
1208 | if (opts->mainline) { |
1209 | struct strbuf buf = STRBUF_INIT; | |
1210 | strbuf_addf(&buf, "%d", opts->mainline); | |
88d5a271 | 1211 | res |= git_config_set_in_file_gently(opts_file, "options.mainline", buf.buf); |
043a4492 RR |
1212 | strbuf_release(&buf); |
1213 | } | |
1214 | if (opts->strategy) | |
88d5a271 | 1215 | res |= git_config_set_in_file_gently(opts_file, "options.strategy", opts->strategy); |
3253553e | 1216 | if (opts->gpg_sign) |
88d5a271 | 1217 | res |= git_config_set_in_file_gently(opts_file, "options.gpg-sign", opts->gpg_sign); |
043a4492 RR |
1218 | if (opts->xopts) { |
1219 | int i; | |
1220 | for (i = 0; i < opts->xopts_nr; i++) | |
88d5a271 | 1221 | res |= git_config_set_multivar_in_file_gently(opts_file, |
043a4492 RR |
1222 | "options.strategy-option", |
1223 | opts->xopts[i], "^$", 0); | |
1224 | } | |
88d5a271 | 1225 | return res; |
043a4492 RR |
1226 | } |
1227 | ||
004fefa7 | 1228 | static int pick_commits(struct todo_list *todo_list, struct replay_opts *opts) |
043a4492 | 1229 | { |
043a4492 RR |
1230 | int res; |
1231 | ||
1232 | setenv(GIT_REFLOG_ACTION, action_name(opts), 0); | |
1233 | if (opts->allow_ff) | |
1234 | assert(!(opts->signoff || opts->no_commit || | |
1235 | opts->record_origin || opts->edit)); | |
0d9c6dc9 JS |
1236 | if (read_and_refresh_cache(opts)) |
1237 | return -1; | |
043a4492 | 1238 | |
004fefa7 JS |
1239 | while (todo_list->current < todo_list->nr) { |
1240 | struct todo_item *item = todo_list->items + todo_list->current; | |
1241 | if (save_todo(todo_list, opts)) | |
221675de | 1242 | return -1; |
004fefa7 JS |
1243 | res = do_pick_commit(item->command, item->commit, opts); |
1244 | todo_list->current++; | |
043a4492 RR |
1245 | if (res) |
1246 | return res; | |
1247 | } | |
1248 | ||
1249 | /* | |
1250 | * Sequence of picks finished successfully; cleanup by | |
1251 | * removing the .git/sequencer directory | |
1252 | */ | |
2863584f | 1253 | return sequencer_remove_state(opts); |
043a4492 RR |
1254 | } |
1255 | ||
1256 | static int continue_single_pick(void) | |
1257 | { | |
1258 | const char *argv[] = { "commit", NULL }; | |
1259 | ||
f932729c JK |
1260 | if (!file_exists(git_path_cherry_pick_head()) && |
1261 | !file_exists(git_path_revert_head())) | |
043a4492 RR |
1262 | return error(_("no cherry-pick or revert in progress")); |
1263 | return run_command_v_opt(argv, RUN_GIT_CMD); | |
1264 | } | |
1265 | ||
2863584f | 1266 | int sequencer_continue(struct replay_opts *opts) |
043a4492 | 1267 | { |
004fefa7 JS |
1268 | struct todo_list todo_list = TODO_LIST_INIT; |
1269 | int res; | |
043a4492 | 1270 | |
2863584f JS |
1271 | if (read_and_refresh_cache(opts)) |
1272 | return -1; | |
1273 | ||
c0246501 | 1274 | if (!file_exists(get_todo_path(opts))) |
043a4492 | 1275 | return continue_single_pick(); |
004fefa7 | 1276 | if (read_populate_opts(opts)) |
0ae42a03 | 1277 | return -1; |
004fefa7 JS |
1278 | if ((res = read_populate_todo(&todo_list, opts))) |
1279 | goto release_todo_list; | |
043a4492 RR |
1280 | |
1281 | /* Verify that the conflict has been resolved */ | |
f932729c JK |
1282 | if (file_exists(git_path_cherry_pick_head()) || |
1283 | file_exists(git_path_revert_head())) { | |
004fefa7 JS |
1284 | res = continue_single_pick(); |
1285 | if (res) | |
1286 | goto release_todo_list; | |
043a4492 | 1287 | } |
004fefa7 JS |
1288 | if (index_differs_from("HEAD", 0)) { |
1289 | res = error_dirty_index(opts); | |
1290 | goto release_todo_list; | |
1291 | } | |
1292 | todo_list.current++; | |
1293 | res = pick_commits(&todo_list, opts); | |
1294 | release_todo_list: | |
1295 | todo_list_release(&todo_list); | |
1296 | return res; | |
043a4492 RR |
1297 | } |
1298 | ||
1299 | static int single_pick(struct commit *cmit, struct replay_opts *opts) | |
1300 | { | |
1301 | setenv(GIT_REFLOG_ACTION, action_name(opts), 0); | |
004fefa7 JS |
1302 | return do_pick_commit(opts->action == REPLAY_PICK ? |
1303 | TODO_PICK : TODO_REVERT, cmit, opts); | |
043a4492 RR |
1304 | } |
1305 | ||
1306 | int sequencer_pick_revisions(struct replay_opts *opts) | |
1307 | { | |
004fefa7 | 1308 | struct todo_list todo_list = TODO_LIST_INIT; |
043a4492 | 1309 | unsigned char sha1[20]; |
004fefa7 | 1310 | int i, res; |
043a4492 | 1311 | |
2863584f | 1312 | assert(opts->revs); |
0d9c6dc9 JS |
1313 | if (read_and_refresh_cache(opts)) |
1314 | return -1; | |
043a4492 | 1315 | |
21246dbb MV |
1316 | for (i = 0; i < opts->revs->pending.nr; i++) { |
1317 | unsigned char sha1[20]; | |
1318 | const char *name = opts->revs->pending.objects[i].name; | |
1319 | ||
1320 | /* This happens when using --stdin. */ | |
1321 | if (!strlen(name)) | |
1322 | continue; | |
1323 | ||
1324 | if (!get_sha1(name, sha1)) { | |
7c0b0d8d JH |
1325 | if (!lookup_commit_reference_gently(sha1, 1)) { |
1326 | enum object_type type = sha1_object_info(sha1, NULL); | |
b9b946d4 JS |
1327 | return error(_("%s: can't cherry-pick a %s"), |
1328 | name, typename(type)); | |
7c0b0d8d | 1329 | } |
21246dbb | 1330 | } else |
b9b946d4 | 1331 | return error(_("%s: bad revision"), name); |
21246dbb MV |
1332 | } |
1333 | ||
043a4492 RR |
1334 | /* |
1335 | * If we were called as "git cherry-pick <commit>", just | |
1336 | * cherry-pick/revert it, set CHERRY_PICK_HEAD / | |
1337 | * REVERT_HEAD, and don't touch the sequencer state. | |
1338 | * This means it is possible to cherry-pick in the middle | |
1339 | * of a cherry-pick sequence. | |
1340 | */ | |
1341 | if (opts->revs->cmdline.nr == 1 && | |
1342 | opts->revs->cmdline.rev->whence == REV_CMD_REV && | |
1343 | opts->revs->no_walk && | |
1344 | !opts->revs->cmdline.rev->flags) { | |
1345 | struct commit *cmit; | |
1346 | if (prepare_revision_walk(opts->revs)) | |
b9b946d4 | 1347 | return error(_("revision walk setup failed")); |
043a4492 RR |
1348 | cmit = get_revision(opts->revs); |
1349 | if (!cmit || get_revision(opts->revs)) | |
b9b946d4 | 1350 | return error("BUG: expected exactly one commit from walk"); |
043a4492 RR |
1351 | return single_pick(cmit, opts); |
1352 | } | |
1353 | ||
1354 | /* | |
1355 | * Start a new cherry-pick/ revert sequence; but | |
1356 | * first, make sure that an existing one isn't in | |
1357 | * progress | |
1358 | */ | |
1359 | ||
34b0528b JS |
1360 | if (walk_revs_populate_todo(&todo_list, opts) || |
1361 | create_seq_dir() < 0) | |
043a4492 | 1362 | return -1; |
0f974e21 MG |
1363 | if (get_sha1("HEAD", sha1) && (opts->action == REPLAY_REVERT)) |
1364 | return error(_("Can't revert as initial commit")); | |
311fd397 JS |
1365 | if (save_head(sha1_to_hex(sha1))) |
1366 | return -1; | |
88d5a271 JS |
1367 | if (save_opts(opts)) |
1368 | return -1; | |
004fefa7 JS |
1369 | res = pick_commits(&todo_list, opts); |
1370 | todo_list_release(&todo_list); | |
1371 | return res; | |
043a4492 | 1372 | } |
5ed75e2a | 1373 | |
bab4d109 | 1374 | void append_signoff(struct strbuf *msgbuf, int ignore_footer, unsigned flag) |
5ed75e2a | 1375 | { |
bab4d109 | 1376 | unsigned no_dup_sob = flag & APPEND_SIGNOFF_DEDUP; |
5ed75e2a | 1377 | struct strbuf sob = STRBUF_INIT; |
bab4d109 | 1378 | int has_footer; |
5ed75e2a MV |
1379 | |
1380 | strbuf_addstr(&sob, sign_off_header); | |
1381 | strbuf_addstr(&sob, fmt_name(getenv("GIT_COMMITTER_NAME"), | |
1382 | getenv("GIT_COMMITTER_EMAIL"))); | |
1383 | strbuf_addch(&sob, '\n'); | |
bab4d109 BC |
1384 | |
1385 | /* | |
1386 | * If the whole message buffer is equal to the sob, pretend that we | |
1387 | * found a conforming footer with a matching sob | |
1388 | */ | |
1389 | if (msgbuf->len - ignore_footer == sob.len && | |
1390 | !strncmp(msgbuf->buf, sob.buf, sob.len)) | |
1391 | has_footer = 3; | |
1392 | else | |
1393 | has_footer = has_conforming_footer(msgbuf, &sob, ignore_footer); | |
1394 | ||
33f2f9ab BC |
1395 | if (!has_footer) { |
1396 | const char *append_newlines = NULL; | |
1397 | size_t len = msgbuf->len - ignore_footer; | |
1398 | ||
8c613fd5 BC |
1399 | if (!len) { |
1400 | /* | |
1401 | * The buffer is completely empty. Leave foom for | |
1402 | * the title and body to be filled in by the user. | |
1403 | */ | |
33f2f9ab | 1404 | append_newlines = "\n\n"; |
8c613fd5 BC |
1405 | } else if (msgbuf->buf[len - 1] != '\n') { |
1406 | /* | |
1407 | * Incomplete line. Complete the line and add a | |
1408 | * blank one so that there is an empty line between | |
1409 | * the message body and the sob. | |
1410 | */ | |
1411 | append_newlines = "\n\n"; | |
1412 | } else if (len == 1) { | |
1413 | /* | |
1414 | * Buffer contains a single newline. Add another | |
1415 | * so that we leave room for the title and body. | |
1416 | */ | |
1417 | append_newlines = "\n"; | |
1418 | } else if (msgbuf->buf[len - 2] != '\n') { | |
1419 | /* | |
1420 | * Buffer ends with a single newline. Add another | |
1421 | * so that there is an empty line between the message | |
1422 | * body and the sob. | |
1423 | */ | |
33f2f9ab | 1424 | append_newlines = "\n"; |
8c613fd5 | 1425 | } /* else, the buffer already ends with two newlines. */ |
33f2f9ab BC |
1426 | |
1427 | if (append_newlines) | |
1428 | strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0, | |
1429 | append_newlines, strlen(append_newlines)); | |
5ed75e2a | 1430 | } |
bab4d109 BC |
1431 | |
1432 | if (has_footer != 3 && (!no_dup_sob || has_footer != 2)) | |
1433 | strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0, | |
1434 | sob.buf, sob.len); | |
1435 | ||
5ed75e2a MV |
1436 | strbuf_release(&sob); |
1437 | } |