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[thirdparty/git.git] / builtin / rebase.c
1 /*
2 * "git rebase" builtin command
3 *
4 * Copyright (c) 2018 Pratik Karki
5 */
6
7 #define USE_THE_INDEX_COMPATIBILITY_MACROS
8 #include "builtin.h"
9 #include "run-command.h"
10 #include "exec-cmd.h"
11 #include "argv-array.h"
12 #include "dir.h"
13 #include "packfile.h"
14 #include "refs.h"
15 #include "quote.h"
16 #include "config.h"
17 #include "cache-tree.h"
18 #include "unpack-trees.h"
19 #include "lockfile.h"
20 #include "parse-options.h"
21 #include "commit.h"
22 #include "diff.h"
23 #include "wt-status.h"
24 #include "revision.h"
25 #include "commit-reach.h"
26 #include "rerere.h"
27 #include "branch.h"
28 #include "sequencer.h"
29 #include "rebase-interactive.h"
30
31 static char const * const builtin_rebase_usage[] = {
32 N_("git rebase [-i] [options] [--exec <cmd>] "
33 "[--onto <newbase> | --keep-base] [<upstream> [<branch>]]"),
34 N_("git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] "
35 "--root [<branch>]"),
36 N_("git rebase --continue | --abort | --skip | --edit-todo"),
37 NULL
38 };
39
40 static GIT_PATH_FUNC(path_squash_onto, "rebase-merge/squash-onto")
41 static GIT_PATH_FUNC(path_interactive, "rebase-merge/interactive")
42 static GIT_PATH_FUNC(apply_dir, "rebase-apply")
43 static GIT_PATH_FUNC(merge_dir, "rebase-merge")
44
45 enum rebase_type {
46 REBASE_UNSPECIFIED = -1,
47 REBASE_AM,
48 REBASE_MERGE,
49 REBASE_INTERACTIVE,
50 REBASE_PRESERVE_MERGES
51 };
52
53 struct rebase_options {
54 enum rebase_type type;
55 const char *state_dir;
56 struct commit *upstream;
57 const char *upstream_name;
58 const char *upstream_arg;
59 char *head_name;
60 struct object_id orig_head;
61 struct commit *onto;
62 const char *onto_name;
63 const char *revisions;
64 const char *switch_to;
65 int root, root_with_onto;
66 struct object_id *squash_onto;
67 struct commit *restrict_revision;
68 int dont_finish_rebase;
69 enum {
70 REBASE_NO_QUIET = 1<<0,
71 REBASE_VERBOSE = 1<<1,
72 REBASE_DIFFSTAT = 1<<2,
73 REBASE_FORCE = 1<<3,
74 REBASE_INTERACTIVE_EXPLICIT = 1<<4,
75 } flags;
76 struct argv_array git_am_opts;
77 const char *action;
78 int signoff;
79 int allow_rerere_autoupdate;
80 int keep_empty;
81 int autosquash;
82 int ignore_whitespace;
83 char *gpg_sign_opt;
84 int autostash;
85 int committer_date_is_author_date;
86 int ignore_date;
87 char *cmd;
88 int allow_empty_message;
89 int rebase_merges, rebase_cousins;
90 char *strategy, *strategy_opts;
91 struct strbuf git_format_patch_opt;
92 int reschedule_failed_exec;
93 int use_legacy_rebase;
94 };
95
96 #define REBASE_OPTIONS_INIT { \
97 .type = REBASE_UNSPECIFIED, \
98 .flags = REBASE_NO_QUIET, \
99 .git_am_opts = ARGV_ARRAY_INIT, \
100 .git_format_patch_opt = STRBUF_INIT \
101 }
102
103 static struct replay_opts get_replay_opts(const struct rebase_options *opts)
104 {
105 struct strbuf strategy_buf = STRBUF_INIT;
106 struct replay_opts replay = REPLAY_OPTS_INIT;
107
108 replay.action = REPLAY_INTERACTIVE_REBASE;
109 sequencer_init_config(&replay);
110
111 replay.signoff = opts->signoff;
112 replay.allow_ff = !(opts->flags & REBASE_FORCE);
113 if (opts->allow_rerere_autoupdate)
114 replay.allow_rerere_auto = opts->allow_rerere_autoupdate;
115 replay.allow_empty = 1;
116 replay.allow_empty_message = opts->allow_empty_message;
117 replay.verbose = opts->flags & REBASE_VERBOSE;
118 replay.reschedule_failed_exec = opts->reschedule_failed_exec;
119 replay.committer_date_is_author_date =
120 opts->committer_date_is_author_date;
121 replay.ignore_date = opts->ignore_date;
122 replay.gpg_sign = xstrdup_or_null(opts->gpg_sign_opt);
123 replay.strategy = opts->strategy;
124
125 if (opts->strategy_opts)
126 strbuf_addstr(&strategy_buf, opts->strategy_opts);
127 if (opts->ignore_whitespace)
128 strbuf_addstr(&strategy_buf, " --ignore-space-change");
129 if (strategy_buf.len)
130 parse_strategy_opts(&replay, strategy_buf.buf);
131
132 strbuf_release(&strategy_buf);
133
134 if (opts->squash_onto) {
135 oidcpy(&replay.squash_onto, opts->squash_onto);
136 replay.have_squash_onto = 1;
137 }
138
139 return replay;
140 }
141
142 enum action {
143 ACTION_NONE = 0,
144 ACTION_CONTINUE,
145 ACTION_SKIP,
146 ACTION_ABORT,
147 ACTION_QUIT,
148 ACTION_EDIT_TODO,
149 ACTION_SHOW_CURRENT_PATCH,
150 ACTION_SHORTEN_OIDS,
151 ACTION_EXPAND_OIDS,
152 ACTION_CHECK_TODO_LIST,
153 ACTION_REARRANGE_SQUASH,
154 ACTION_ADD_EXEC
155 };
156
157 static const char *action_names[] = { "undefined",
158 "continue",
159 "skip",
160 "abort",
161 "quit",
162 "edit_todo",
163 "show_current_patch" };
164
165 static int add_exec_commands(struct string_list *commands)
166 {
167 const char *todo_file = rebase_path_todo();
168 struct todo_list todo_list = TODO_LIST_INIT;
169 int res;
170
171 if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0)
172 return error_errno(_("could not read '%s'."), todo_file);
173
174 if (todo_list_parse_insn_buffer(the_repository, todo_list.buf.buf,
175 &todo_list)) {
176 todo_list_release(&todo_list);
177 return error(_("unusable todo list: '%s'"), todo_file);
178 }
179
180 todo_list_add_exec_commands(&todo_list, commands);
181 res = todo_list_write_to_file(the_repository, &todo_list,
182 todo_file, NULL, NULL, -1, 0);
183 todo_list_release(&todo_list);
184
185 if (res)
186 return error_errno(_("could not write '%s'."), todo_file);
187 return 0;
188 }
189
190 static int rearrange_squash_in_todo_file(void)
191 {
192 const char *todo_file = rebase_path_todo();
193 struct todo_list todo_list = TODO_LIST_INIT;
194 int res = 0;
195
196 if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0)
197 return error_errno(_("could not read '%s'."), todo_file);
198 if (todo_list_parse_insn_buffer(the_repository, todo_list.buf.buf,
199 &todo_list)) {
200 todo_list_release(&todo_list);
201 return error(_("unusable todo list: '%s'"), todo_file);
202 }
203
204 res = todo_list_rearrange_squash(&todo_list);
205 if (!res)
206 res = todo_list_write_to_file(the_repository, &todo_list,
207 todo_file, NULL, NULL, -1, 0);
208
209 todo_list_release(&todo_list);
210
211 if (res)
212 return error_errno(_("could not write '%s'."), todo_file);
213 return 0;
214 }
215
216 static int transform_todo_file(unsigned flags)
217 {
218 const char *todo_file = rebase_path_todo();
219 struct todo_list todo_list = TODO_LIST_INIT;
220 int res;
221
222 if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0)
223 return error_errno(_("could not read '%s'."), todo_file);
224
225 if (todo_list_parse_insn_buffer(the_repository, todo_list.buf.buf,
226 &todo_list)) {
227 todo_list_release(&todo_list);
228 return error(_("unusable todo list: '%s'"), todo_file);
229 }
230
231 res = todo_list_write_to_file(the_repository, &todo_list, todo_file,
232 NULL, NULL, -1, flags);
233 todo_list_release(&todo_list);
234
235 if (res)
236 return error_errno(_("could not write '%s'."), todo_file);
237 return 0;
238 }
239
240 static int edit_todo_file(unsigned flags)
241 {
242 const char *todo_file = rebase_path_todo();
243 struct todo_list todo_list = TODO_LIST_INIT,
244 new_todo = TODO_LIST_INIT;
245 int res = 0;
246
247 if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0)
248 return error_errno(_("could not read '%s'."), todo_file);
249
250 strbuf_stripspace(&todo_list.buf, 1);
251 res = edit_todo_list(the_repository, &todo_list, &new_todo, NULL, NULL, flags);
252 if (!res && todo_list_write_to_file(the_repository, &new_todo, todo_file,
253 NULL, NULL, -1, flags & ~(TODO_LIST_SHORTEN_IDS)))
254 res = error_errno(_("could not write '%s'"), todo_file);
255
256 todo_list_release(&todo_list);
257 todo_list_release(&new_todo);
258
259 return res;
260 }
261
262 static int get_revision_ranges(struct commit *upstream, struct commit *onto,
263 const char **head_hash,
264 char **revisions, char **shortrevisions)
265 {
266 struct commit *base_rev = upstream ? upstream : onto;
267 const char *shorthead;
268 struct object_id orig_head;
269
270 if (get_oid("HEAD", &orig_head))
271 return error(_("no HEAD?"));
272
273 *head_hash = find_unique_abbrev(&orig_head, GIT_MAX_HEXSZ);
274 *revisions = xstrfmt("%s...%s", oid_to_hex(&base_rev->object.oid),
275 *head_hash);
276
277 shorthead = find_unique_abbrev(&orig_head, DEFAULT_ABBREV);
278
279 if (upstream) {
280 const char *shortrev;
281
282 shortrev = find_unique_abbrev(&base_rev->object.oid,
283 DEFAULT_ABBREV);
284
285 *shortrevisions = xstrfmt("%s..%s", shortrev, shorthead);
286 } else
287 *shortrevisions = xstrdup(shorthead);
288
289 return 0;
290 }
291
292 static int init_basic_state(struct replay_opts *opts, const char *head_name,
293 struct commit *onto, const char *orig_head)
294 {
295 FILE *interactive;
296
297 if (!is_directory(merge_dir()) && mkdir_in_gitdir(merge_dir()))
298 return error_errno(_("could not create temporary %s"), merge_dir());
299
300 delete_reflog("REBASE_HEAD");
301
302 interactive = fopen(path_interactive(), "w");
303 if (!interactive)
304 return error_errno(_("could not mark as interactive"));
305 fclose(interactive);
306
307 return write_basic_state(opts, head_name, onto, orig_head);
308 }
309
310 static void split_exec_commands(const char *cmd, struct string_list *commands)
311 {
312 if (cmd && *cmd) {
313 string_list_split(commands, cmd, '\n', -1);
314
315 /* rebase.c adds a new line to cmd after every command,
316 * so here the last command is always empty */
317 string_list_remove_empty_items(commands, 0);
318 }
319 }
320
321 static int do_interactive_rebase(struct rebase_options *opts, unsigned flags)
322 {
323 int ret;
324 const char *head_hash = NULL;
325 char *revisions = NULL, *shortrevisions = NULL;
326 struct argv_array make_script_args = ARGV_ARRAY_INIT;
327 struct todo_list todo_list = TODO_LIST_INIT;
328 struct replay_opts replay = get_replay_opts(opts);
329 struct string_list commands = STRING_LIST_INIT_DUP;
330
331 if (prepare_branch_to_be_rebased(the_repository, &replay,
332 opts->switch_to))
333 return -1;
334
335 if (get_revision_ranges(opts->upstream, opts->onto, &head_hash,
336 &revisions, &shortrevisions))
337 return -1;
338
339 if (init_basic_state(&replay,
340 opts->head_name ? opts->head_name : "detached HEAD",
341 opts->onto, head_hash)) {
342 free(revisions);
343 free(shortrevisions);
344
345 return -1;
346 }
347
348 if (!opts->upstream && opts->squash_onto)
349 write_file(path_squash_onto(), "%s\n",
350 oid_to_hex(opts->squash_onto));
351
352 argv_array_pushl(&make_script_args, "", revisions, NULL);
353 if (opts->restrict_revision)
354 argv_array_push(&make_script_args,
355 oid_to_hex(&opts->restrict_revision->object.oid));
356
357 ret = sequencer_make_script(the_repository, &todo_list.buf,
358 make_script_args.argc, make_script_args.argv,
359 flags);
360
361 if (ret)
362 error(_("could not generate todo list"));
363 else {
364 discard_cache();
365 if (todo_list_parse_insn_buffer(the_repository, todo_list.buf.buf,
366 &todo_list))
367 BUG("unusable todo list");
368
369 split_exec_commands(opts->cmd, &commands);
370 ret = complete_action(the_repository, &replay, flags,
371 shortrevisions, opts->onto_name, opts->onto, head_hash,
372 &commands, opts->autosquash, &todo_list);
373 }
374
375 string_list_clear(&commands, 0);
376 free(revisions);
377 free(shortrevisions);
378 todo_list_release(&todo_list);
379 argv_array_clear(&make_script_args);
380
381 return ret;
382 }
383
384 static int run_rebase_interactive(struct rebase_options *opts,
385 enum action command)
386 {
387 unsigned flags = 0;
388 int abbreviate_commands = 0, ret = 0;
389
390 git_config_get_bool("rebase.abbreviatecommands", &abbreviate_commands);
391
392 flags |= opts->keep_empty ? TODO_LIST_KEEP_EMPTY : 0;
393 flags |= abbreviate_commands ? TODO_LIST_ABBREVIATE_CMDS : 0;
394 flags |= opts->rebase_merges ? TODO_LIST_REBASE_MERGES : 0;
395 flags |= opts->rebase_cousins > 0 ? TODO_LIST_REBASE_COUSINS : 0;
396 flags |= opts->root_with_onto ? TODO_LIST_ROOT_WITH_ONTO : 0;
397 flags |= command == ACTION_SHORTEN_OIDS ? TODO_LIST_SHORTEN_IDS : 0;
398
399 switch (command) {
400 case ACTION_NONE: {
401 if (!opts->onto && !opts->upstream)
402 die(_("a base commit must be provided with --upstream or --onto"));
403
404 ret = do_interactive_rebase(opts, flags);
405 break;
406 }
407 case ACTION_SKIP: {
408 struct string_list merge_rr = STRING_LIST_INIT_DUP;
409
410 rerere_clear(the_repository, &merge_rr);
411 }
412 /* fallthrough */
413 case ACTION_CONTINUE: {
414 struct replay_opts replay_opts = get_replay_opts(opts);
415
416 ret = sequencer_continue(the_repository, &replay_opts);
417 break;
418 }
419 case ACTION_EDIT_TODO:
420 ret = edit_todo_file(flags);
421 break;
422 case ACTION_SHOW_CURRENT_PATCH: {
423 struct child_process cmd = CHILD_PROCESS_INIT;
424
425 cmd.git_cmd = 1;
426 argv_array_pushl(&cmd.args, "show", "REBASE_HEAD", "--", NULL);
427 ret = run_command(&cmd);
428
429 break;
430 }
431 case ACTION_SHORTEN_OIDS:
432 case ACTION_EXPAND_OIDS:
433 ret = transform_todo_file(flags);
434 break;
435 case ACTION_CHECK_TODO_LIST:
436 ret = check_todo_list_from_file(the_repository);
437 break;
438 case ACTION_REARRANGE_SQUASH:
439 ret = rearrange_squash_in_todo_file();
440 break;
441 case ACTION_ADD_EXEC: {
442 struct string_list commands = STRING_LIST_INIT_DUP;
443
444 split_exec_commands(opts->cmd, &commands);
445 ret = add_exec_commands(&commands);
446 string_list_clear(&commands, 0);
447 break;
448 }
449 default:
450 BUG("invalid command '%d'", command);
451 }
452
453 return ret;
454 }
455
456 static const char * const builtin_rebase_interactive_usage[] = {
457 N_("git rebase--interactive [<options>]"),
458 NULL
459 };
460
461 int cmd_rebase__interactive(int argc, const char **argv, const char *prefix)
462 {
463 struct rebase_options opts = REBASE_OPTIONS_INIT;
464 struct object_id squash_onto = null_oid;
465 enum action command = ACTION_NONE;
466 struct option options[] = {
467 OPT_NEGBIT(0, "ff", &opts.flags, N_("allow fast-forward"),
468 REBASE_FORCE),
469 OPT_BOOL(0, "keep-empty", &opts.keep_empty, N_("keep empty commits")),
470 OPT_BOOL(0, "allow-empty-message", &opts.allow_empty_message,
471 N_("allow commits with empty messages")),
472 OPT_BOOL(0, "rebase-merges", &opts.rebase_merges, N_("rebase merge commits")),
473 OPT_BOOL(0, "rebase-cousins", &opts.rebase_cousins,
474 N_("keep original branch points of cousins")),
475 OPT_BOOL(0, "autosquash", &opts.autosquash,
476 N_("move commits that begin with squash!/fixup!")),
477 OPT_BOOL(0, "signoff", &opts.signoff, N_("sign commits")),
478 OPT_BIT('v', "verbose", &opts.flags,
479 N_("display a diffstat of what changed upstream"),
480 REBASE_NO_QUIET | REBASE_VERBOSE | REBASE_DIFFSTAT),
481 OPT_CMDMODE(0, "continue", &command, N_("continue rebase"),
482 ACTION_CONTINUE),
483 OPT_CMDMODE(0, "skip", &command, N_("skip commit"), ACTION_SKIP),
484 OPT_CMDMODE(0, "edit-todo", &command, N_("edit the todo list"),
485 ACTION_EDIT_TODO),
486 OPT_CMDMODE(0, "show-current-patch", &command, N_("show the current patch"),
487 ACTION_SHOW_CURRENT_PATCH),
488 OPT_CMDMODE(0, "shorten-ids", &command,
489 N_("shorten commit ids in the todo list"), ACTION_SHORTEN_OIDS),
490 OPT_CMDMODE(0, "expand-ids", &command,
491 N_("expand commit ids in the todo list"), ACTION_EXPAND_OIDS),
492 OPT_CMDMODE(0, "check-todo-list", &command,
493 N_("check the todo list"), ACTION_CHECK_TODO_LIST),
494 OPT_CMDMODE(0, "rearrange-squash", &command,
495 N_("rearrange fixup/squash lines"), ACTION_REARRANGE_SQUASH),
496 OPT_CMDMODE(0, "add-exec-commands", &command,
497 N_("insert exec commands in todo list"), ACTION_ADD_EXEC),
498 { OPTION_CALLBACK, 0, "onto", &opts.onto, N_("onto"), N_("onto"),
499 PARSE_OPT_NONEG, parse_opt_commit, 0 },
500 { OPTION_CALLBACK, 0, "restrict-revision", &opts.restrict_revision,
501 N_("restrict-revision"), N_("restrict revision"),
502 PARSE_OPT_NONEG, parse_opt_commit, 0 },
503 { OPTION_CALLBACK, 0, "squash-onto", &squash_onto, N_("squash-onto"),
504 N_("squash onto"), PARSE_OPT_NONEG, parse_opt_object_id, 0 },
505 { OPTION_CALLBACK, 0, "upstream", &opts.upstream, N_("upstream"),
506 N_("the upstream commit"), PARSE_OPT_NONEG, parse_opt_commit,
507 0 },
508 OPT_STRING(0, "head-name", &opts.head_name, N_("head-name"), N_("head name")),
509 { OPTION_STRING, 'S', "gpg-sign", &opts.gpg_sign_opt, N_("key-id"),
510 N_("GPG-sign commits"),
511 PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
512 OPT_STRING(0, "strategy", &opts.strategy, N_("strategy"),
513 N_("rebase strategy")),
514 OPT_STRING(0, "strategy-opts", &opts.strategy_opts, N_("strategy-opts"),
515 N_("strategy options")),
516 OPT_STRING(0, "switch-to", &opts.switch_to, N_("switch-to"),
517 N_("the branch or commit to checkout")),
518 OPT_STRING(0, "onto-name", &opts.onto_name, N_("onto-name"), N_("onto name")),
519 OPT_STRING(0, "cmd", &opts.cmd, N_("cmd"), N_("the command to run")),
520 OPT_RERERE_AUTOUPDATE(&opts.allow_rerere_autoupdate),
521 OPT_BOOL(0, "reschedule-failed-exec", &opts.reschedule_failed_exec,
522 N_("automatically re-schedule any `exec` that fails")),
523 OPT_END()
524 };
525
526 opts.rebase_cousins = -1;
527
528 if (argc == 1)
529 usage_with_options(builtin_rebase_interactive_usage, options);
530
531 argc = parse_options(argc, argv, prefix, options,
532 builtin_rebase_interactive_usage, PARSE_OPT_KEEP_ARGV0);
533
534 opts.strategy_opts = xstrdup_or_null(opts.strategy_opts);
535
536 if (!is_null_oid(&squash_onto))
537 opts.squash_onto = &squash_onto;
538
539 if (opts.rebase_cousins >= 0 && !opts.rebase_merges)
540 warning(_("--[no-]rebase-cousins has no effect without "
541 "--rebase-merges"));
542
543 return !!run_rebase_interactive(&opts, command);
544 }
545
546 static int is_interactive(struct rebase_options *opts)
547 {
548 return opts->type == REBASE_INTERACTIVE ||
549 opts->type == REBASE_PRESERVE_MERGES;
550 }
551
552 static void imply_interactive(struct rebase_options *opts, const char *option)
553 {
554 switch (opts->type) {
555 case REBASE_AM:
556 die(_("%s requires an interactive rebase"), option);
557 break;
558 case REBASE_INTERACTIVE:
559 case REBASE_PRESERVE_MERGES:
560 break;
561 case REBASE_MERGE:
562 /* we now implement --merge via --interactive */
563 default:
564 opts->type = REBASE_INTERACTIVE; /* implied */
565 break;
566 }
567 }
568
569 /* Returns the filename prefixed by the state_dir */
570 static const char *state_dir_path(const char *filename, struct rebase_options *opts)
571 {
572 static struct strbuf path = STRBUF_INIT;
573 static size_t prefix_len;
574
575 if (!prefix_len) {
576 strbuf_addf(&path, "%s/", opts->state_dir);
577 prefix_len = path.len;
578 }
579
580 strbuf_setlen(&path, prefix_len);
581 strbuf_addstr(&path, filename);
582 return path.buf;
583 }
584
585 /* Read one file, then strip line endings */
586 static int read_one(const char *path, struct strbuf *buf)
587 {
588 if (strbuf_read_file(buf, path, 0) < 0)
589 return error_errno(_("could not read '%s'"), path);
590 strbuf_trim_trailing_newline(buf);
591 return 0;
592 }
593
594 /* Initialize the rebase options from the state directory. */
595 static int read_basic_state(struct rebase_options *opts)
596 {
597 struct strbuf head_name = STRBUF_INIT;
598 struct strbuf buf = STRBUF_INIT;
599 struct object_id oid;
600
601 if (read_one(state_dir_path("head-name", opts), &head_name) ||
602 read_one(state_dir_path("onto", opts), &buf))
603 return -1;
604 opts->head_name = starts_with(head_name.buf, "refs/") ?
605 xstrdup(head_name.buf) : NULL;
606 strbuf_release(&head_name);
607 if (get_oid(buf.buf, &oid))
608 return error(_("could not get 'onto': '%s'"), buf.buf);
609 opts->onto = lookup_commit_or_die(&oid, buf.buf);
610
611 /*
612 * We always write to orig-head, but interactive rebase used to write to
613 * head. Fall back to reading from head to cover for the case that the
614 * user upgraded git with an ongoing interactive rebase.
615 */
616 strbuf_reset(&buf);
617 if (file_exists(state_dir_path("orig-head", opts))) {
618 if (read_one(state_dir_path("orig-head", opts), &buf))
619 return -1;
620 } else if (read_one(state_dir_path("head", opts), &buf))
621 return -1;
622 if (get_oid(buf.buf, &opts->orig_head))
623 return error(_("invalid orig-head: '%s'"), buf.buf);
624
625 if (file_exists(state_dir_path("quiet", opts)))
626 opts->flags &= ~REBASE_NO_QUIET;
627 else
628 opts->flags |= REBASE_NO_QUIET;
629
630 if (file_exists(state_dir_path("verbose", opts)))
631 opts->flags |= REBASE_VERBOSE;
632
633 if (file_exists(state_dir_path("signoff", opts))) {
634 opts->signoff = 1;
635 opts->flags |= REBASE_FORCE;
636 }
637
638 if (file_exists(state_dir_path("allow_rerere_autoupdate", opts))) {
639 strbuf_reset(&buf);
640 if (read_one(state_dir_path("allow_rerere_autoupdate", opts),
641 &buf))
642 return -1;
643 if (!strcmp(buf.buf, "--rerere-autoupdate"))
644 opts->allow_rerere_autoupdate = RERERE_AUTOUPDATE;
645 else if (!strcmp(buf.buf, "--no-rerere-autoupdate"))
646 opts->allow_rerere_autoupdate = RERERE_NOAUTOUPDATE;
647 else
648 warning(_("ignoring invalid allow_rerere_autoupdate: "
649 "'%s'"), buf.buf);
650 }
651
652 if (file_exists(state_dir_path("gpg_sign_opt", opts))) {
653 strbuf_reset(&buf);
654 if (read_one(state_dir_path("gpg_sign_opt", opts),
655 &buf))
656 return -1;
657 free(opts->gpg_sign_opt);
658 opts->gpg_sign_opt = xstrdup(buf.buf);
659 }
660
661 if (file_exists(state_dir_path("strategy", opts))) {
662 strbuf_reset(&buf);
663 if (read_one(state_dir_path("strategy", opts), &buf))
664 return -1;
665 free(opts->strategy);
666 opts->strategy = xstrdup(buf.buf);
667 }
668
669 if (file_exists(state_dir_path("strategy_opts", opts))) {
670 strbuf_reset(&buf);
671 if (read_one(state_dir_path("strategy_opts", opts), &buf))
672 return -1;
673 free(opts->strategy_opts);
674 opts->strategy_opts = xstrdup(buf.buf);
675 }
676
677 strbuf_release(&buf);
678
679 return 0;
680 }
681
682 static int rebase_write_basic_state(struct rebase_options *opts)
683 {
684 write_file(state_dir_path("head-name", opts), "%s",
685 opts->head_name ? opts->head_name : "detached HEAD");
686 write_file(state_dir_path("onto", opts), "%s",
687 opts->onto ? oid_to_hex(&opts->onto->object.oid) : "");
688 write_file(state_dir_path("orig-head", opts), "%s",
689 oid_to_hex(&opts->orig_head));
690 write_file(state_dir_path("quiet", opts), "%s",
691 opts->flags & REBASE_NO_QUIET ? "" : "t");
692 if (opts->flags & REBASE_VERBOSE)
693 write_file(state_dir_path("verbose", opts), "%s", "");
694 if (opts->strategy)
695 write_file(state_dir_path("strategy", opts), "%s",
696 opts->strategy);
697 if (opts->strategy_opts)
698 write_file(state_dir_path("strategy_opts", opts), "%s",
699 opts->strategy_opts);
700 if (opts->allow_rerere_autoupdate > 0)
701 write_file(state_dir_path("allow_rerere_autoupdate", opts),
702 "-%s-rerere-autoupdate",
703 opts->allow_rerere_autoupdate == RERERE_AUTOUPDATE ?
704 "" : "-no");
705 if (opts->gpg_sign_opt)
706 write_file(state_dir_path("gpg_sign_opt", opts), "%s",
707 opts->gpg_sign_opt);
708 if (opts->signoff)
709 write_file(state_dir_path("signoff", opts), "--signoff");
710
711 return 0;
712 }
713
714 static int apply_autostash(struct rebase_options *opts)
715 {
716 const char *path = state_dir_path("autostash", opts);
717 struct strbuf autostash = STRBUF_INIT;
718 struct child_process stash_apply = CHILD_PROCESS_INIT;
719
720 if (!file_exists(path))
721 return 0;
722
723 if (read_one(path, &autostash))
724 return error(_("Could not read '%s'"), path);
725 /* Ensure that the hash is not mistaken for a number */
726 strbuf_addstr(&autostash, "^0");
727 argv_array_pushl(&stash_apply.args,
728 "stash", "apply", autostash.buf, NULL);
729 stash_apply.git_cmd = 1;
730 stash_apply.no_stderr = stash_apply.no_stdout =
731 stash_apply.no_stdin = 1;
732 if (!run_command(&stash_apply))
733 printf(_("Applied autostash.\n"));
734 else {
735 struct argv_array args = ARGV_ARRAY_INIT;
736 int res = 0;
737
738 argv_array_pushl(&args,
739 "stash", "store", "-m", "autostash", "-q",
740 autostash.buf, NULL);
741 if (run_command_v_opt(args.argv, RUN_GIT_CMD))
742 res = error(_("Cannot store %s"), autostash.buf);
743 argv_array_clear(&args);
744 strbuf_release(&autostash);
745 if (res)
746 return res;
747
748 fprintf(stderr,
749 _("Applying autostash resulted in conflicts.\n"
750 "Your changes are safe in the stash.\n"
751 "You can run \"git stash pop\" or \"git stash drop\" "
752 "at any time.\n"));
753 }
754
755 strbuf_release(&autostash);
756 return 0;
757 }
758
759 static int finish_rebase(struct rebase_options *opts)
760 {
761 struct strbuf dir = STRBUF_INIT;
762 const char *argv_gc_auto[] = { "gc", "--auto", NULL };
763 int ret = 0;
764
765 delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF);
766 apply_autostash(opts);
767 close_object_store(the_repository->objects);
768 /*
769 * We ignore errors in 'gc --auto', since the
770 * user should see them.
771 */
772 run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
773 if (opts->type == REBASE_INTERACTIVE) {
774 struct replay_opts replay = REPLAY_OPTS_INIT;
775
776 replay.action = REPLAY_INTERACTIVE_REBASE;
777 ret = sequencer_remove_state(&replay);
778 } else {
779 strbuf_addstr(&dir, opts->state_dir);
780 if (remove_dir_recursively(&dir, 0))
781 ret = error(_("could not remove '%s'"),
782 opts->state_dir);
783 strbuf_release(&dir);
784 }
785
786 return ret;
787 }
788
789 static struct commit *peel_committish(const char *name)
790 {
791 struct object *obj;
792 struct object_id oid;
793
794 if (get_oid(name, &oid))
795 return NULL;
796 obj = parse_object(the_repository, &oid);
797 return (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT);
798 }
799
800 static void add_var(struct strbuf *buf, const char *name, const char *value)
801 {
802 if (!value)
803 strbuf_addf(buf, "unset %s; ", name);
804 else {
805 strbuf_addf(buf, "%s=", name);
806 sq_quote_buf(buf, value);
807 strbuf_addstr(buf, "; ");
808 }
809 }
810
811 #define GIT_REFLOG_ACTION_ENVIRONMENT "GIT_REFLOG_ACTION"
812
813 #define RESET_HEAD_DETACH (1<<0)
814 #define RESET_HEAD_HARD (1<<1)
815 #define RESET_HEAD_RUN_POST_CHECKOUT_HOOK (1<<2)
816 #define RESET_HEAD_REFS_ONLY (1<<3)
817 #define RESET_ORIG_HEAD (1<<4)
818
819 static int reset_head(struct object_id *oid, const char *action,
820 const char *switch_to_branch, unsigned flags,
821 const char *reflog_orig_head, const char *reflog_head)
822 {
823 unsigned detach_head = flags & RESET_HEAD_DETACH;
824 unsigned reset_hard = flags & RESET_HEAD_HARD;
825 unsigned run_hook = flags & RESET_HEAD_RUN_POST_CHECKOUT_HOOK;
826 unsigned refs_only = flags & RESET_HEAD_REFS_ONLY;
827 unsigned update_orig_head = flags & RESET_ORIG_HEAD;
828 struct object_id head_oid;
829 struct tree_desc desc[2] = { { NULL }, { NULL } };
830 struct lock_file lock = LOCK_INIT;
831 struct unpack_trees_options unpack_tree_opts;
832 struct tree *tree;
833 const char *reflog_action;
834 struct strbuf msg = STRBUF_INIT;
835 size_t prefix_len;
836 struct object_id *orig = NULL, oid_orig,
837 *old_orig = NULL, oid_old_orig;
838 int ret = 0, nr = 0;
839
840 if (switch_to_branch && !starts_with(switch_to_branch, "refs/"))
841 BUG("Not a fully qualified branch: '%s'", switch_to_branch);
842
843 if (!refs_only && hold_locked_index(&lock, LOCK_REPORT_ON_ERROR) < 0) {
844 ret = -1;
845 goto leave_reset_head;
846 }
847
848 if ((!oid || !reset_hard) && get_oid("HEAD", &head_oid)) {
849 ret = error(_("could not determine HEAD revision"));
850 goto leave_reset_head;
851 }
852
853 if (!oid)
854 oid = &head_oid;
855
856 if (refs_only)
857 goto reset_head_refs;
858
859 memset(&unpack_tree_opts, 0, sizeof(unpack_tree_opts));
860 setup_unpack_trees_porcelain(&unpack_tree_opts, action);
861 unpack_tree_opts.head_idx = 1;
862 unpack_tree_opts.src_index = the_repository->index;
863 unpack_tree_opts.dst_index = the_repository->index;
864 unpack_tree_opts.fn = reset_hard ? oneway_merge : twoway_merge;
865 unpack_tree_opts.update = 1;
866 unpack_tree_opts.merge = 1;
867 if (!detach_head)
868 unpack_tree_opts.reset = 1;
869
870 if (repo_read_index_unmerged(the_repository) < 0) {
871 ret = error(_("could not read index"));
872 goto leave_reset_head;
873 }
874
875 if (!reset_hard && !fill_tree_descriptor(the_repository, &desc[nr++], &head_oid)) {
876 ret = error(_("failed to find tree of %s"),
877 oid_to_hex(&head_oid));
878 goto leave_reset_head;
879 }
880
881 if (!fill_tree_descriptor(the_repository, &desc[nr++], oid)) {
882 ret = error(_("failed to find tree of %s"), oid_to_hex(oid));
883 goto leave_reset_head;
884 }
885
886 if (unpack_trees(nr, desc, &unpack_tree_opts)) {
887 ret = -1;
888 goto leave_reset_head;
889 }
890
891 tree = parse_tree_indirect(oid);
892 prime_cache_tree(the_repository, the_repository->index, tree);
893
894 if (write_locked_index(the_repository->index, &lock, COMMIT_LOCK) < 0) {
895 ret = error(_("could not write index"));
896 goto leave_reset_head;
897 }
898
899 reset_head_refs:
900 reflog_action = getenv(GIT_REFLOG_ACTION_ENVIRONMENT);
901 strbuf_addf(&msg, "%s: ", reflog_action ? reflog_action : "rebase");
902 prefix_len = msg.len;
903
904 if (update_orig_head) {
905 if (!get_oid("ORIG_HEAD", &oid_old_orig))
906 old_orig = &oid_old_orig;
907 if (!get_oid("HEAD", &oid_orig)) {
908 orig = &oid_orig;
909 if (!reflog_orig_head) {
910 strbuf_addstr(&msg, "updating ORIG_HEAD");
911 reflog_orig_head = msg.buf;
912 }
913 update_ref(reflog_orig_head, "ORIG_HEAD", orig,
914 old_orig, 0, UPDATE_REFS_MSG_ON_ERR);
915 } else if (old_orig)
916 delete_ref(NULL, "ORIG_HEAD", old_orig, 0);
917 }
918
919 if (!reflog_head) {
920 strbuf_setlen(&msg, prefix_len);
921 strbuf_addstr(&msg, "updating HEAD");
922 reflog_head = msg.buf;
923 }
924 if (!switch_to_branch)
925 ret = update_ref(reflog_head, "HEAD", oid, orig,
926 detach_head ? REF_NO_DEREF : 0,
927 UPDATE_REFS_MSG_ON_ERR);
928 else {
929 ret = update_ref(reflog_head, switch_to_branch, oid,
930 NULL, 0, UPDATE_REFS_MSG_ON_ERR);
931 if (!ret)
932 ret = create_symref("HEAD", switch_to_branch,
933 reflog_head);
934 }
935 if (run_hook)
936 run_hook_le(NULL, "post-checkout",
937 oid_to_hex(orig ? orig : &null_oid),
938 oid_to_hex(oid), "1", NULL);
939
940 leave_reset_head:
941 strbuf_release(&msg);
942 rollback_lock_file(&lock);
943 while (nr)
944 free((void *)desc[--nr].buffer);
945 return ret;
946 }
947
948 static int move_to_original_branch(struct rebase_options *opts)
949 {
950 struct strbuf orig_head_reflog = STRBUF_INIT, head_reflog = STRBUF_INIT;
951 int ret;
952
953 if (!opts->head_name)
954 return 0; /* nothing to move back to */
955
956 if (!opts->onto)
957 BUG("move_to_original_branch without onto");
958
959 strbuf_addf(&orig_head_reflog, "rebase finished: %s onto %s",
960 opts->head_name, oid_to_hex(&opts->onto->object.oid));
961 strbuf_addf(&head_reflog, "rebase finished: returning to %s",
962 opts->head_name);
963 ret = reset_head(NULL, "", opts->head_name, RESET_HEAD_REFS_ONLY,
964 orig_head_reflog.buf, head_reflog.buf);
965
966 strbuf_release(&orig_head_reflog);
967 strbuf_release(&head_reflog);
968 return ret;
969 }
970
971 static const char *resolvemsg =
972 N_("Resolve all conflicts manually, mark them as resolved with\n"
973 "\"git add/rm <conflicted_files>\", then run \"git rebase --continue\".\n"
974 "You can instead skip this commit: run \"git rebase --skip\".\n"
975 "To abort and get back to the state before \"git rebase\", run "
976 "\"git rebase --abort\".");
977
978 static int run_am(struct rebase_options *opts)
979 {
980 struct child_process am = CHILD_PROCESS_INIT;
981 struct child_process format_patch = CHILD_PROCESS_INIT;
982 struct strbuf revisions = STRBUF_INIT;
983 int status;
984 char *rebased_patches;
985
986 am.git_cmd = 1;
987 argv_array_push(&am.args, "am");
988
989 if (opts->ignore_whitespace)
990 argv_array_push(&am.args, "--ignore-whitespace");
991 if (opts->committer_date_is_author_date)
992 argv_array_push(&opts->git_am_opts, "--committer-date-is-author-date");
993 if (opts->ignore_date)
994 argv_array_push(&opts->git_am_opts, "--ignore-date");
995 if (opts->action && !strcmp("continue", opts->action)) {
996 argv_array_push(&am.args, "--resolved");
997 argv_array_pushf(&am.args, "--resolvemsg=%s", resolvemsg);
998 if (opts->gpg_sign_opt)
999 argv_array_push(&am.args, opts->gpg_sign_opt);
1000 status = run_command(&am);
1001 if (status)
1002 return status;
1003
1004 return move_to_original_branch(opts);
1005 }
1006 if (opts->action && !strcmp("skip", opts->action)) {
1007 argv_array_push(&am.args, "--skip");
1008 argv_array_pushf(&am.args, "--resolvemsg=%s", resolvemsg);
1009 status = run_command(&am);
1010 if (status)
1011 return status;
1012
1013 return move_to_original_branch(opts);
1014 }
1015 if (opts->action && !strcmp("show-current-patch", opts->action)) {
1016 argv_array_push(&am.args, "--show-current-patch");
1017 return run_command(&am);
1018 }
1019
1020 strbuf_addf(&revisions, "%s...%s",
1021 oid_to_hex(opts->root ?
1022 /* this is now equivalent to !opts->upstream */
1023 &opts->onto->object.oid :
1024 &opts->upstream->object.oid),
1025 oid_to_hex(&opts->orig_head));
1026
1027 rebased_patches = xstrdup(git_path("rebased-patches"));
1028 format_patch.out = open(rebased_patches,
1029 O_WRONLY | O_CREAT | O_TRUNC, 0666);
1030 if (format_patch.out < 0) {
1031 status = error_errno(_("could not open '%s' for writing"),
1032 rebased_patches);
1033 free(rebased_patches);
1034 argv_array_clear(&am.args);
1035 return status;
1036 }
1037
1038 format_patch.git_cmd = 1;
1039 argv_array_pushl(&format_patch.args, "format-patch", "-k", "--stdout",
1040 "--full-index", "--cherry-pick", "--right-only",
1041 "--src-prefix=a/", "--dst-prefix=b/", "--no-renames",
1042 "--no-cover-letter", "--pretty=mboxrd", "--topo-order",
1043 "--no-base", NULL);
1044 if (opts->git_format_patch_opt.len)
1045 argv_array_split(&format_patch.args,
1046 opts->git_format_patch_opt.buf);
1047 argv_array_push(&format_patch.args, revisions.buf);
1048 if (opts->restrict_revision)
1049 argv_array_pushf(&format_patch.args, "^%s",
1050 oid_to_hex(&opts->restrict_revision->object.oid));
1051
1052 status = run_command(&format_patch);
1053 if (status) {
1054 unlink(rebased_patches);
1055 free(rebased_patches);
1056 argv_array_clear(&am.args);
1057
1058 reset_head(&opts->orig_head, "checkout", opts->head_name, 0,
1059 "HEAD", NULL);
1060 error(_("\ngit encountered an error while preparing the "
1061 "patches to replay\n"
1062 "these revisions:\n"
1063 "\n %s\n\n"
1064 "As a result, git cannot rebase them."),
1065 opts->revisions);
1066
1067 strbuf_release(&revisions);
1068 return status;
1069 }
1070 strbuf_release(&revisions);
1071
1072 am.in = open(rebased_patches, O_RDONLY);
1073 if (am.in < 0) {
1074 status = error_errno(_("could not open '%s' for reading"),
1075 rebased_patches);
1076 free(rebased_patches);
1077 argv_array_clear(&am.args);
1078 return status;
1079 }
1080
1081 argv_array_pushv(&am.args, opts->git_am_opts.argv);
1082 argv_array_push(&am.args, "--rebasing");
1083 argv_array_pushf(&am.args, "--resolvemsg=%s", resolvemsg);
1084 argv_array_push(&am.args, "--patch-format=mboxrd");
1085 if (opts->allow_rerere_autoupdate == RERERE_AUTOUPDATE)
1086 argv_array_push(&am.args, "--rerere-autoupdate");
1087 else if (opts->allow_rerere_autoupdate == RERERE_NOAUTOUPDATE)
1088 argv_array_push(&am.args, "--no-rerere-autoupdate");
1089 if (opts->gpg_sign_opt)
1090 argv_array_push(&am.args, opts->gpg_sign_opt);
1091 status = run_command(&am);
1092 unlink(rebased_patches);
1093 free(rebased_patches);
1094
1095 if (!status) {
1096 return move_to_original_branch(opts);
1097 }
1098
1099 if (is_directory(opts->state_dir))
1100 rebase_write_basic_state(opts);
1101
1102 return status;
1103 }
1104
1105 static int run_specific_rebase(struct rebase_options *opts, enum action action)
1106 {
1107 const char *argv[] = { NULL, NULL };
1108 struct strbuf script_snippet = STRBUF_INIT, buf = STRBUF_INIT;
1109 int status;
1110 const char *backend, *backend_func;
1111
1112 if (opts->type == REBASE_INTERACTIVE) {
1113 /* Run builtin interactive rebase */
1114 setenv("GIT_CHERRY_PICK_HELP", resolvemsg, 1);
1115 if (!(opts->flags & REBASE_INTERACTIVE_EXPLICIT)) {
1116 setenv("GIT_SEQUENCE_EDITOR", ":", 1);
1117 opts->autosquash = 0;
1118 }
1119 if (opts->gpg_sign_opt) {
1120 /* remove the leading "-S" */
1121 char *tmp = xstrdup(opts->gpg_sign_opt + 2);
1122 free(opts->gpg_sign_opt);
1123 opts->gpg_sign_opt = tmp;
1124 }
1125
1126 status = run_rebase_interactive(opts, action);
1127 goto finished_rebase;
1128 }
1129
1130 if (opts->type == REBASE_AM) {
1131 status = run_am(opts);
1132 goto finished_rebase;
1133 }
1134
1135 add_var(&script_snippet, "GIT_DIR", absolute_path(get_git_dir()));
1136 add_var(&script_snippet, "state_dir", opts->state_dir);
1137
1138 add_var(&script_snippet, "upstream_name", opts->upstream_name);
1139 add_var(&script_snippet, "upstream", opts->upstream ?
1140 oid_to_hex(&opts->upstream->object.oid) : NULL);
1141 add_var(&script_snippet, "head_name",
1142 opts->head_name ? opts->head_name : "detached HEAD");
1143 add_var(&script_snippet, "orig_head", oid_to_hex(&opts->orig_head));
1144 add_var(&script_snippet, "onto", opts->onto ?
1145 oid_to_hex(&opts->onto->object.oid) : NULL);
1146 add_var(&script_snippet, "onto_name", opts->onto_name);
1147 add_var(&script_snippet, "revisions", opts->revisions);
1148 add_var(&script_snippet, "restrict_revision", opts->restrict_revision ?
1149 oid_to_hex(&opts->restrict_revision->object.oid) : NULL);
1150 add_var(&script_snippet, "GIT_QUIET",
1151 opts->flags & REBASE_NO_QUIET ? "" : "t");
1152 sq_quote_argv_pretty(&buf, opts->git_am_opts.argv);
1153 add_var(&script_snippet, "git_am_opt", buf.buf);
1154 strbuf_release(&buf);
1155 add_var(&script_snippet, "verbose",
1156 opts->flags & REBASE_VERBOSE ? "t" : "");
1157 add_var(&script_snippet, "diffstat",
1158 opts->flags & REBASE_DIFFSTAT ? "t" : "");
1159 add_var(&script_snippet, "force_rebase",
1160 opts->flags & REBASE_FORCE ? "t" : "");
1161 if (opts->switch_to)
1162 add_var(&script_snippet, "switch_to", opts->switch_to);
1163 add_var(&script_snippet, "action", opts->action ? opts->action : "");
1164 add_var(&script_snippet, "signoff", opts->signoff ? "--signoff" : "");
1165 add_var(&script_snippet, "allow_rerere_autoupdate",
1166 opts->allow_rerere_autoupdate ?
1167 opts->allow_rerere_autoupdate == RERERE_AUTOUPDATE ?
1168 "--rerere-autoupdate" : "--no-rerere-autoupdate" : "");
1169 add_var(&script_snippet, "keep_empty", opts->keep_empty ? "yes" : "");
1170 add_var(&script_snippet, "autosquash", opts->autosquash ? "t" : "");
1171 add_var(&script_snippet, "gpg_sign_opt", opts->gpg_sign_opt);
1172 add_var(&script_snippet, "cmd", opts->cmd);
1173 add_var(&script_snippet, "allow_empty_message",
1174 opts->allow_empty_message ? "--allow-empty-message" : "");
1175 add_var(&script_snippet, "rebase_merges",
1176 opts->rebase_merges ? "t" : "");
1177 add_var(&script_snippet, "rebase_cousins",
1178 opts->rebase_cousins ? "t" : "");
1179 add_var(&script_snippet, "strategy", opts->strategy);
1180 add_var(&script_snippet, "strategy_opts", opts->strategy_opts);
1181 add_var(&script_snippet, "rebase_root", opts->root ? "t" : "");
1182 add_var(&script_snippet, "squash_onto",
1183 opts->squash_onto ? oid_to_hex(opts->squash_onto) : "");
1184 add_var(&script_snippet, "git_format_patch_opt",
1185 opts->git_format_patch_opt.buf);
1186
1187 if (is_interactive(opts) &&
1188 !(opts->flags & REBASE_INTERACTIVE_EXPLICIT)) {
1189 strbuf_addstr(&script_snippet,
1190 "GIT_SEQUENCE_EDITOR=:; export GIT_SEQUENCE_EDITOR; ");
1191 opts->autosquash = 0;
1192 }
1193
1194 switch (opts->type) {
1195 case REBASE_PRESERVE_MERGES:
1196 backend = "git-rebase--preserve-merges";
1197 backend_func = "git_rebase__preserve_merges";
1198 break;
1199 default:
1200 BUG("Unhandled rebase type %d", opts->type);
1201 break;
1202 }
1203
1204 strbuf_addf(&script_snippet,
1205 ". git-sh-setup && . %s && %s", backend, backend_func);
1206 argv[0] = script_snippet.buf;
1207
1208 status = run_command_v_opt(argv, RUN_USING_SHELL);
1209 finished_rebase:
1210 if (opts->dont_finish_rebase)
1211 ; /* do nothing */
1212 else if (opts->type == REBASE_INTERACTIVE)
1213 ; /* interactive rebase cleans up after itself */
1214 else if (status == 0) {
1215 if (!file_exists(state_dir_path("stopped-sha", opts)))
1216 finish_rebase(opts);
1217 } else if (status == 2) {
1218 struct strbuf dir = STRBUF_INIT;
1219
1220 apply_autostash(opts);
1221 strbuf_addstr(&dir, opts->state_dir);
1222 remove_dir_recursively(&dir, 0);
1223 strbuf_release(&dir);
1224 die("Nothing to do");
1225 }
1226
1227 strbuf_release(&script_snippet);
1228
1229 return status ? -1 : 0;
1230 }
1231
1232 static int rebase_config(const char *var, const char *value, void *data)
1233 {
1234 struct rebase_options *opts = data;
1235
1236 if (!strcmp(var, "rebase.stat")) {
1237 if (git_config_bool(var, value))
1238 opts->flags |= REBASE_DIFFSTAT;
1239 else
1240 opts->flags &= ~REBASE_DIFFSTAT;
1241 return 0;
1242 }
1243
1244 if (!strcmp(var, "rebase.autosquash")) {
1245 opts->autosquash = git_config_bool(var, value);
1246 return 0;
1247 }
1248
1249 if (!strcmp(var, "commit.gpgsign")) {
1250 free(opts->gpg_sign_opt);
1251 opts->gpg_sign_opt = git_config_bool(var, value) ?
1252 xstrdup("-S") : NULL;
1253 return 0;
1254 }
1255
1256 if (!strcmp(var, "rebase.autostash")) {
1257 opts->autostash = git_config_bool(var, value);
1258 return 0;
1259 }
1260
1261 if (!strcmp(var, "rebase.reschedulefailedexec")) {
1262 opts->reschedule_failed_exec = git_config_bool(var, value);
1263 return 0;
1264 }
1265
1266 if (!strcmp(var, "rebase.usebuiltin")) {
1267 opts->use_legacy_rebase = !git_config_bool(var, value);
1268 return 0;
1269 }
1270
1271 return git_default_config(var, value, data);
1272 }
1273
1274 /*
1275 * Determines whether the commits in from..to are linear, i.e. contain
1276 * no merge commits. This function *expects* `from` to be an ancestor of
1277 * `to`.
1278 */
1279 static int is_linear_history(struct commit *from, struct commit *to)
1280 {
1281 while (to && to != from) {
1282 parse_commit(to);
1283 if (!to->parents)
1284 return 1;
1285 if (to->parents->next)
1286 return 0;
1287 to = to->parents->item;
1288 }
1289 return 1;
1290 }
1291
1292 static int can_fast_forward(struct commit *onto, struct commit *upstream,
1293 struct commit *restrict_revision,
1294 struct object_id *head_oid, struct object_id *merge_base)
1295 {
1296 struct commit *head = lookup_commit(the_repository, head_oid);
1297 struct commit_list *merge_bases = NULL;
1298 int res = 0;
1299
1300 if (!head)
1301 goto done;
1302
1303 merge_bases = get_merge_bases(onto, head);
1304 if (!merge_bases || merge_bases->next) {
1305 oidcpy(merge_base, &null_oid);
1306 goto done;
1307 }
1308
1309 oidcpy(merge_base, &merge_bases->item->object.oid);
1310 if (!oideq(merge_base, &onto->object.oid))
1311 goto done;
1312
1313 if (restrict_revision && !oideq(&restrict_revision->object.oid, merge_base))
1314 goto done;
1315
1316 if (!upstream)
1317 goto done;
1318
1319 free_commit_list(merge_bases);
1320 merge_bases = get_merge_bases(upstream, head);
1321 if (!merge_bases || merge_bases->next)
1322 goto done;
1323
1324 if (!oideq(&onto->object.oid, &merge_bases->item->object.oid))
1325 goto done;
1326
1327 res = 1;
1328
1329 done:
1330 free_commit_list(merge_bases);
1331 return res && is_linear_history(onto, head);
1332 }
1333
1334 /* -i followed by -m is still -i */
1335 static int parse_opt_merge(const struct option *opt, const char *arg, int unset)
1336 {
1337 struct rebase_options *opts = opt->value;
1338
1339 BUG_ON_OPT_NEG(unset);
1340 BUG_ON_OPT_ARG(arg);
1341
1342 if (!is_interactive(opts))
1343 opts->type = REBASE_MERGE;
1344
1345 return 0;
1346 }
1347
1348 /* -i followed by -p is still explicitly interactive, but -p alone is not */
1349 static int parse_opt_interactive(const struct option *opt, const char *arg,
1350 int unset)
1351 {
1352 struct rebase_options *opts = opt->value;
1353
1354 BUG_ON_OPT_NEG(unset);
1355 BUG_ON_OPT_ARG(arg);
1356
1357 opts->type = REBASE_INTERACTIVE;
1358 opts->flags |= REBASE_INTERACTIVE_EXPLICIT;
1359
1360 return 0;
1361 }
1362
1363 static void NORETURN error_on_missing_default_upstream(void)
1364 {
1365 struct branch *current_branch = branch_get(NULL);
1366
1367 printf(_("%s\n"
1368 "Please specify which branch you want to rebase against.\n"
1369 "See git-rebase(1) for details.\n"
1370 "\n"
1371 " git rebase '<branch>'\n"
1372 "\n"),
1373 current_branch ? _("There is no tracking information for "
1374 "the current branch.") :
1375 _("You are not currently on a branch."));
1376
1377 if (current_branch) {
1378 const char *remote = current_branch->remote_name;
1379
1380 if (!remote)
1381 remote = _("<remote>");
1382
1383 printf(_("If you wish to set tracking information for this "
1384 "branch you can do so with:\n"
1385 "\n"
1386 " git branch --set-upstream-to=%s/<branch> %s\n"
1387 "\n"),
1388 remote, current_branch->name);
1389 }
1390 exit(1);
1391 }
1392
1393 static void set_reflog_action(struct rebase_options *options)
1394 {
1395 const char *env;
1396 struct strbuf buf = STRBUF_INIT;
1397
1398 if (!is_interactive(options))
1399 return;
1400
1401 env = getenv(GIT_REFLOG_ACTION_ENVIRONMENT);
1402 if (env && strcmp("rebase", env))
1403 return; /* only override it if it is "rebase" */
1404
1405 strbuf_addf(&buf, "rebase -i (%s)", options->action);
1406 setenv(GIT_REFLOG_ACTION_ENVIRONMENT, buf.buf, 1);
1407 strbuf_release(&buf);
1408 }
1409
1410 static int check_exec_cmd(const char *cmd)
1411 {
1412 if (strchr(cmd, '\n'))
1413 return error(_("exec commands cannot contain newlines"));
1414
1415 /* Does the command consist purely of whitespace? */
1416 if (!cmd[strspn(cmd, " \t\r\f\v")])
1417 return error(_("empty exec command"));
1418
1419 return 0;
1420 }
1421
1422
1423 int cmd_rebase(int argc, const char **argv, const char *prefix)
1424 {
1425 struct rebase_options options = REBASE_OPTIONS_INIT;
1426 const char *branch_name;
1427 int ret, flags, total_argc, in_progress = 0;
1428 int keep_base = 0;
1429 int ok_to_skip_pre_rebase = 0;
1430 struct strbuf msg = STRBUF_INIT;
1431 struct strbuf revisions = STRBUF_INIT;
1432 struct strbuf buf = STRBUF_INIT;
1433 struct object_id merge_base;
1434 enum action action = ACTION_NONE;
1435 const char *gpg_sign = NULL;
1436 struct string_list exec = STRING_LIST_INIT_NODUP;
1437 const char *rebase_merges = NULL;
1438 int fork_point = -1;
1439 struct string_list strategy_options = STRING_LIST_INIT_NODUP;
1440 struct object_id squash_onto;
1441 char *squash_onto_name = NULL;
1442 int reschedule_failed_exec = -1;
1443 struct option builtin_rebase_options[] = {
1444 OPT_STRING(0, "onto", &options.onto_name,
1445 N_("revision"),
1446 N_("rebase onto given branch instead of upstream")),
1447 OPT_BOOL(0, "keep-base", &keep_base,
1448 N_("use the merge-base of upstream and branch as the current base")),
1449 OPT_BOOL(0, "no-verify", &ok_to_skip_pre_rebase,
1450 N_("allow pre-rebase hook to run")),
1451 OPT_NEGBIT('q', "quiet", &options.flags,
1452 N_("be quiet. implies --no-stat"),
1453 REBASE_NO_QUIET| REBASE_VERBOSE | REBASE_DIFFSTAT),
1454 OPT_BIT('v', "verbose", &options.flags,
1455 N_("display a diffstat of what changed upstream"),
1456 REBASE_NO_QUIET | REBASE_VERBOSE | REBASE_DIFFSTAT),
1457 {OPTION_NEGBIT, 'n', "no-stat", &options.flags, NULL,
1458 N_("do not show diffstat of what changed upstream"),
1459 PARSE_OPT_NOARG, NULL, REBASE_DIFFSTAT },
1460 OPT_BOOL(0, "signoff", &options.signoff,
1461 N_("add a Signed-off-by: line to each commit")),
1462 OPT_BOOL(0, "committer-date-is-author-date",
1463 &options.committer_date_is_author_date,
1464 N_("make committer date match author date")),
1465 OPT_BOOL(0, "reset-author-date", &options.ignore_date,
1466 N_("ignore author date and use current date")),
1467 OPT_HIDDEN_BOOL(0, "ignore-date", &options.ignore_date,
1468 N_("synonym of --reset-author-date")),
1469 OPT_PASSTHRU_ARGV('C', NULL, &options.git_am_opts, N_("n"),
1470 N_("passed to 'git apply'"), 0),
1471 OPT_BOOL(0, "ignore-whitespace", &options.ignore_whitespace,
1472 N_("ignore changes in whitespace")),
1473 OPT_PASSTHRU_ARGV(0, "whitespace", &options.git_am_opts,
1474 N_("action"), N_("passed to 'git apply'"), 0),
1475 OPT_BIT('f', "force-rebase", &options.flags,
1476 N_("cherry-pick all commits, even if unchanged"),
1477 REBASE_FORCE),
1478 OPT_BIT(0, "no-ff", &options.flags,
1479 N_("cherry-pick all commits, even if unchanged"),
1480 REBASE_FORCE),
1481 OPT_CMDMODE(0, "continue", &action, N_("continue"),
1482 ACTION_CONTINUE),
1483 OPT_CMDMODE(0, "skip", &action,
1484 N_("skip current patch and continue"), ACTION_SKIP),
1485 OPT_CMDMODE(0, "abort", &action,
1486 N_("abort and check out the original branch"),
1487 ACTION_ABORT),
1488 OPT_CMDMODE(0, "quit", &action,
1489 N_("abort but keep HEAD where it is"), ACTION_QUIT),
1490 OPT_CMDMODE(0, "edit-todo", &action, N_("edit the todo list "
1491 "during an interactive rebase"), ACTION_EDIT_TODO),
1492 OPT_CMDMODE(0, "show-current-patch", &action,
1493 N_("show the patch file being applied or merged"),
1494 ACTION_SHOW_CURRENT_PATCH),
1495 { OPTION_CALLBACK, 'm', "merge", &options, NULL,
1496 N_("use merging strategies to rebase"),
1497 PARSE_OPT_NOARG | PARSE_OPT_NONEG,
1498 parse_opt_merge },
1499 { OPTION_CALLBACK, 'i', "interactive", &options, NULL,
1500 N_("let the user edit the list of commits to rebase"),
1501 PARSE_OPT_NOARG | PARSE_OPT_NONEG,
1502 parse_opt_interactive },
1503 OPT_SET_INT_F('p', "preserve-merges", &options.type,
1504 N_("(DEPRECATED) try to recreate merges instead of "
1505 "ignoring them"),
1506 REBASE_PRESERVE_MERGES, PARSE_OPT_HIDDEN),
1507 OPT_RERERE_AUTOUPDATE(&options.allow_rerere_autoupdate),
1508 OPT_BOOL('k', "keep-empty", &options.keep_empty,
1509 N_("preserve empty commits during rebase")),
1510 OPT_BOOL(0, "autosquash", &options.autosquash,
1511 N_("move commits that begin with "
1512 "squash!/fixup! under -i")),
1513 { OPTION_STRING, 'S', "gpg-sign", &gpg_sign, N_("key-id"),
1514 N_("GPG-sign commits"),
1515 PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
1516 OPT_BOOL(0, "autostash", &options.autostash,
1517 N_("automatically stash/stash pop before and after")),
1518 OPT_STRING_LIST('x', "exec", &exec, N_("exec"),
1519 N_("add exec lines after each commit of the "
1520 "editable list")),
1521 OPT_BOOL(0, "allow-empty-message",
1522 &options.allow_empty_message,
1523 N_("allow rebasing commits with empty messages")),
1524 {OPTION_STRING, 'r', "rebase-merges", &rebase_merges,
1525 N_("mode"),
1526 N_("try to rebase merges instead of skipping them"),
1527 PARSE_OPT_OPTARG, NULL, (intptr_t)""},
1528 OPT_BOOL(0, "fork-point", &fork_point,
1529 N_("use 'merge-base --fork-point' to refine upstream")),
1530 OPT_STRING('s', "strategy", &options.strategy,
1531 N_("strategy"), N_("use the given merge strategy")),
1532 OPT_STRING_LIST('X', "strategy-option", &strategy_options,
1533 N_("option"),
1534 N_("pass the argument through to the merge "
1535 "strategy")),
1536 OPT_BOOL(0, "root", &options.root,
1537 N_("rebase all reachable commits up to the root(s)")),
1538 OPT_BOOL(0, "reschedule-failed-exec",
1539 &reschedule_failed_exec,
1540 N_("automatically re-schedule any `exec` that fails")),
1541 OPT_END(),
1542 };
1543 int i;
1544
1545 if (argc == 2 && !strcmp(argv[1], "-h"))
1546 usage_with_options(builtin_rebase_usage,
1547 builtin_rebase_options);
1548
1549 options.allow_empty_message = 1;
1550 git_config(rebase_config, &options);
1551
1552 if (options.use_legacy_rebase ||
1553 !git_env_bool("GIT_TEST_REBASE_USE_BUILTIN", -1))
1554 warning(_("the rebase.useBuiltin support has been removed!\n"
1555 "See its entry in 'git help config' for details."));
1556
1557 strbuf_reset(&buf);
1558 strbuf_addf(&buf, "%s/applying", apply_dir());
1559 if(file_exists(buf.buf))
1560 die(_("It looks like 'git am' is in progress. Cannot rebase."));
1561
1562 if (is_directory(apply_dir())) {
1563 options.type = REBASE_AM;
1564 options.state_dir = apply_dir();
1565 } else if (is_directory(merge_dir())) {
1566 strbuf_reset(&buf);
1567 strbuf_addf(&buf, "%s/rewritten", merge_dir());
1568 if (is_directory(buf.buf)) {
1569 options.type = REBASE_PRESERVE_MERGES;
1570 options.flags |= REBASE_INTERACTIVE_EXPLICIT;
1571 } else {
1572 strbuf_reset(&buf);
1573 strbuf_addf(&buf, "%s/interactive", merge_dir());
1574 if(file_exists(buf.buf)) {
1575 options.type = REBASE_INTERACTIVE;
1576 options.flags |= REBASE_INTERACTIVE_EXPLICIT;
1577 } else
1578 options.type = REBASE_MERGE;
1579 }
1580 options.state_dir = merge_dir();
1581 }
1582
1583 if (options.type != REBASE_UNSPECIFIED)
1584 in_progress = 1;
1585
1586 total_argc = argc;
1587 argc = parse_options(argc, argv, prefix,
1588 builtin_rebase_options,
1589 builtin_rebase_usage, 0);
1590
1591 if (action != ACTION_NONE && total_argc != 2) {
1592 usage_with_options(builtin_rebase_usage,
1593 builtin_rebase_options);
1594 }
1595
1596 if (argc > 2)
1597 usage_with_options(builtin_rebase_usage,
1598 builtin_rebase_options);
1599
1600 if (options.type == REBASE_PRESERVE_MERGES)
1601 warning(_("git rebase --preserve-merges is deprecated. "
1602 "Use --rebase-merges instead."));
1603
1604 if (keep_base) {
1605 if (options.onto_name)
1606 die(_("cannot combine '--keep-base' with '--onto'"));
1607 if (options.root)
1608 die(_("cannot combine '--keep-base' with '--root'"));
1609 }
1610
1611 if (action != ACTION_NONE && !in_progress)
1612 die(_("No rebase in progress?"));
1613 setenv(GIT_REFLOG_ACTION_ENVIRONMENT, "rebase", 0);
1614
1615 if (action == ACTION_EDIT_TODO && !is_interactive(&options))
1616 die(_("The --edit-todo action can only be used during "
1617 "interactive rebase."));
1618
1619 if (trace2_is_enabled()) {
1620 if (is_interactive(&options))
1621 trace2_cmd_mode("interactive");
1622 else if (exec.nr)
1623 trace2_cmd_mode("interactive-exec");
1624 else
1625 trace2_cmd_mode(action_names[action]);
1626 }
1627
1628 switch (action) {
1629 case ACTION_CONTINUE: {
1630 struct object_id head;
1631 struct lock_file lock_file = LOCK_INIT;
1632 int fd;
1633
1634 options.action = "continue";
1635 set_reflog_action(&options);
1636
1637 /* Sanity check */
1638 if (get_oid("HEAD", &head))
1639 die(_("Cannot read HEAD"));
1640
1641 fd = hold_locked_index(&lock_file, 0);
1642 if (repo_read_index(the_repository) < 0)
1643 die(_("could not read index"));
1644 refresh_index(the_repository->index, REFRESH_QUIET, NULL, NULL,
1645 NULL);
1646 if (0 <= fd)
1647 repo_update_index_if_able(the_repository, &lock_file);
1648 rollback_lock_file(&lock_file);
1649
1650 if (has_unstaged_changes(the_repository, 1)) {
1651 puts(_("You must edit all merge conflicts and then\n"
1652 "mark them as resolved using git add"));
1653 exit(1);
1654 }
1655 if (read_basic_state(&options))
1656 exit(1);
1657 goto run_rebase;
1658 }
1659 case ACTION_SKIP: {
1660 struct string_list merge_rr = STRING_LIST_INIT_DUP;
1661
1662 options.action = "skip";
1663 set_reflog_action(&options);
1664
1665 rerere_clear(the_repository, &merge_rr);
1666 string_list_clear(&merge_rr, 1);
1667
1668 if (reset_head(NULL, "reset", NULL, RESET_HEAD_HARD,
1669 NULL, NULL) < 0)
1670 die(_("could not discard worktree changes"));
1671 remove_branch_state(the_repository, 0);
1672 if (read_basic_state(&options))
1673 exit(1);
1674 goto run_rebase;
1675 }
1676 case ACTION_ABORT: {
1677 struct string_list merge_rr = STRING_LIST_INIT_DUP;
1678 options.action = "abort";
1679 set_reflog_action(&options);
1680
1681 rerere_clear(the_repository, &merge_rr);
1682 string_list_clear(&merge_rr, 1);
1683
1684 if (read_basic_state(&options))
1685 exit(1);
1686 if (reset_head(&options.orig_head, "reset",
1687 options.head_name, RESET_HEAD_HARD,
1688 NULL, NULL) < 0)
1689 die(_("could not move back to %s"),
1690 oid_to_hex(&options.orig_head));
1691 remove_branch_state(the_repository, 0);
1692 ret = !!finish_rebase(&options);
1693 goto cleanup;
1694 }
1695 case ACTION_QUIT: {
1696 if (options.type == REBASE_INTERACTIVE) {
1697 struct replay_opts replay = REPLAY_OPTS_INIT;
1698
1699 replay.action = REPLAY_INTERACTIVE_REBASE;
1700 ret = !!sequencer_remove_state(&replay);
1701 } else {
1702 strbuf_reset(&buf);
1703 strbuf_addstr(&buf, options.state_dir);
1704 ret = !!remove_dir_recursively(&buf, 0);
1705 if (ret)
1706 error(_("could not remove '%s'"),
1707 options.state_dir);
1708 }
1709 goto cleanup;
1710 }
1711 case ACTION_EDIT_TODO:
1712 options.action = "edit-todo";
1713 options.dont_finish_rebase = 1;
1714 goto run_rebase;
1715 case ACTION_SHOW_CURRENT_PATCH:
1716 options.action = "show-current-patch";
1717 options.dont_finish_rebase = 1;
1718 goto run_rebase;
1719 case ACTION_NONE:
1720 break;
1721 default:
1722 BUG("action: %d", action);
1723 }
1724
1725 /* Make sure no rebase is in progress */
1726 if (in_progress) {
1727 const char *last_slash = strrchr(options.state_dir, '/');
1728 const char *state_dir_base =
1729 last_slash ? last_slash + 1 : options.state_dir;
1730 const char *cmd_live_rebase =
1731 "git rebase (--continue | --abort | --skip)";
1732 strbuf_reset(&buf);
1733 strbuf_addf(&buf, "rm -fr \"%s\"", options.state_dir);
1734 die(_("It seems that there is already a %s directory, and\n"
1735 "I wonder if you are in the middle of another rebase. "
1736 "If that is the\n"
1737 "case, please try\n\t%s\n"
1738 "If that is not the case, please\n\t%s\n"
1739 "and run me again. I am stopping in case you still "
1740 "have something\n"
1741 "valuable there.\n"),
1742 state_dir_base, cmd_live_rebase, buf.buf);
1743 }
1744
1745 if (options.committer_date_is_author_date ||
1746 options.ignore_date)
1747 options.flags |= REBASE_FORCE;
1748
1749 for (i = 0; i < options.git_am_opts.argc; i++) {
1750 const char *option = options.git_am_opts.argv[i], *p;
1751 if (!strcmp(option, "--whitespace=fix") ||
1752 !strcmp(option, "--whitespace=strip"))
1753 options.flags |= REBASE_FORCE;
1754 else if (skip_prefix(option, "-C", &p)) {
1755 while (*p)
1756 if (!isdigit(*(p++)))
1757 die(_("switch `C' expects a "
1758 "numerical value"));
1759 } else if (skip_prefix(option, "--whitespace=", &p)) {
1760 if (*p && strcmp(p, "warn") && strcmp(p, "nowarn") &&
1761 strcmp(p, "error") && strcmp(p, "error-all"))
1762 die("Invalid whitespace option: '%s'", p);
1763 }
1764 }
1765
1766 for (i = 0; i < exec.nr; i++)
1767 if (check_exec_cmd(exec.items[i].string))
1768 exit(1);
1769
1770 if (!(options.flags & REBASE_NO_QUIET))
1771 argv_array_push(&options.git_am_opts, "-q");
1772
1773 if (options.keep_empty)
1774 imply_interactive(&options, "--keep-empty");
1775
1776 if (gpg_sign) {
1777 free(options.gpg_sign_opt);
1778 options.gpg_sign_opt = xstrfmt("-S%s", gpg_sign);
1779 }
1780
1781 if (exec.nr) {
1782 int i;
1783
1784 imply_interactive(&options, "--exec");
1785
1786 strbuf_reset(&buf);
1787 for (i = 0; i < exec.nr; i++)
1788 strbuf_addf(&buf, "exec %s\n", exec.items[i].string);
1789 options.cmd = xstrdup(buf.buf);
1790 }
1791
1792 if (rebase_merges) {
1793 if (!*rebase_merges)
1794 ; /* default mode; do nothing */
1795 else if (!strcmp("rebase-cousins", rebase_merges))
1796 options.rebase_cousins = 1;
1797 else if (strcmp("no-rebase-cousins", rebase_merges))
1798 die(_("Unknown mode: %s"), rebase_merges);
1799 options.rebase_merges = 1;
1800 imply_interactive(&options, "--rebase-merges");
1801 }
1802
1803 if (strategy_options.nr) {
1804 int i;
1805
1806 if (!options.strategy)
1807 options.strategy = "recursive";
1808
1809 strbuf_reset(&buf);
1810 for (i = 0; i < strategy_options.nr; i++)
1811 strbuf_addf(&buf, " --%s",
1812 strategy_options.items[i].string);
1813 options.strategy_opts = xstrdup(buf.buf);
1814 }
1815
1816 if (options.strategy) {
1817 options.strategy = xstrdup(options.strategy);
1818 switch (options.type) {
1819 case REBASE_AM:
1820 die(_("--strategy requires --merge or --interactive"));
1821 case REBASE_MERGE:
1822 case REBASE_INTERACTIVE:
1823 case REBASE_PRESERVE_MERGES:
1824 /* compatible */
1825 break;
1826 case REBASE_UNSPECIFIED:
1827 options.type = REBASE_MERGE;
1828 break;
1829 default:
1830 BUG("unhandled rebase type (%d)", options.type);
1831 }
1832 }
1833
1834 if (options.type == REBASE_MERGE)
1835 imply_interactive(&options, "--merge");
1836
1837 if (options.root && !options.onto_name)
1838 imply_interactive(&options, "--root without --onto");
1839
1840 if (isatty(2) && options.flags & REBASE_NO_QUIET)
1841 strbuf_addstr(&options.git_format_patch_opt, " --progress");
1842
1843 switch (options.type) {
1844 case REBASE_MERGE:
1845 case REBASE_INTERACTIVE:
1846 case REBASE_PRESERVE_MERGES:
1847 options.state_dir = merge_dir();
1848 break;
1849 case REBASE_AM:
1850 options.state_dir = apply_dir();
1851 break;
1852 default:
1853 /* the default rebase backend is `--am` */
1854 options.type = REBASE_AM;
1855 options.state_dir = apply_dir();
1856 break;
1857 }
1858
1859 if (reschedule_failed_exec > 0 && !is_interactive(&options))
1860 die(_("--reschedule-failed-exec requires "
1861 "--exec or --interactive"));
1862 if (reschedule_failed_exec >= 0)
1863 options.reschedule_failed_exec = reschedule_failed_exec;
1864
1865 if (options.git_am_opts.argc) {
1866 /* all am options except -q are compatible only with --am */
1867 for (i = options.git_am_opts.argc - 1; i >= 0; i--)
1868 if (strcmp(options.git_am_opts.argv[i], "-q"))
1869 break;
1870
1871 if (is_interactive(&options) && i >= 0)
1872 die(_("cannot combine am options with either "
1873 "interactive or merge options"));
1874 }
1875
1876 if (options.signoff) {
1877 if (options.type == REBASE_PRESERVE_MERGES)
1878 die("cannot combine '--signoff' with "
1879 "'--preserve-merges'");
1880 argv_array_push(&options.git_am_opts, "--signoff");
1881 options.flags |= REBASE_FORCE;
1882 }
1883
1884 if (options.type == REBASE_PRESERVE_MERGES) {
1885 /*
1886 * Note: incompatibility with --signoff handled in signoff block above
1887 * Note: incompatibility with --interactive is just a strong warning;
1888 * git-rebase.txt caveats with "unless you know what you are doing"
1889 */
1890 if (options.rebase_merges)
1891 die(_("cannot combine '--preserve-merges' with "
1892 "'--rebase-merges'"));
1893
1894 if (options.reschedule_failed_exec)
1895 die(_("error: cannot combine '--preserve-merges' with "
1896 "'--reschedule-failed-exec'"));
1897 }
1898
1899 if (!options.root) {
1900 if (argc < 1) {
1901 struct branch *branch;
1902
1903 branch = branch_get(NULL);
1904 options.upstream_name = branch_get_upstream(branch,
1905 NULL);
1906 if (!options.upstream_name)
1907 error_on_missing_default_upstream();
1908 if (fork_point < 0)
1909 fork_point = 1;
1910 } else {
1911 options.upstream_name = argv[0];
1912 argc--;
1913 argv++;
1914 if (!strcmp(options.upstream_name, "-"))
1915 options.upstream_name = "@{-1}";
1916 }
1917 options.upstream = peel_committish(options.upstream_name);
1918 if (!options.upstream)
1919 die(_("invalid upstream '%s'"), options.upstream_name);
1920 options.upstream_arg = options.upstream_name;
1921 } else {
1922 if (!options.onto_name) {
1923 if (commit_tree("", 0, the_hash_algo->empty_tree, NULL,
1924 &squash_onto, NULL, NULL) < 0)
1925 die(_("Could not create new root commit"));
1926 options.squash_onto = &squash_onto;
1927 options.onto_name = squash_onto_name =
1928 xstrdup(oid_to_hex(&squash_onto));
1929 } else
1930 options.root_with_onto = 1;
1931
1932 options.upstream_name = NULL;
1933 options.upstream = NULL;
1934 if (argc > 1)
1935 usage_with_options(builtin_rebase_usage,
1936 builtin_rebase_options);
1937 options.upstream_arg = "--root";
1938 }
1939
1940 /* Make sure the branch to rebase onto is valid. */
1941 if (keep_base) {
1942 strbuf_reset(&buf);
1943 strbuf_addstr(&buf, options.upstream_name);
1944 strbuf_addstr(&buf, "...");
1945 options.onto_name = xstrdup(buf.buf);
1946 } else if (!options.onto_name)
1947 options.onto_name = options.upstream_name;
1948 if (strstr(options.onto_name, "...")) {
1949 if (get_oid_mb(options.onto_name, &merge_base) < 0) {
1950 if (keep_base)
1951 die(_("'%s': need exactly one merge base with branch"),
1952 options.upstream_name);
1953 else
1954 die(_("'%s': need exactly one merge base"),
1955 options.onto_name);
1956 }
1957 options.onto = lookup_commit_or_die(&merge_base,
1958 options.onto_name);
1959 } else {
1960 options.onto = peel_committish(options.onto_name);
1961 if (!options.onto)
1962 die(_("Does not point to a valid commit '%s'"),
1963 options.onto_name);
1964 }
1965
1966 /*
1967 * If the branch to rebase is given, that is the branch we will rebase
1968 * branch_name -- branch/commit being rebased, or
1969 * HEAD (already detached)
1970 * orig_head -- commit object name of tip of the branch before rebasing
1971 * head_name -- refs/heads/<that-branch> or NULL (detached HEAD)
1972 */
1973 if (argc == 1) {
1974 /* Is it "rebase other branchname" or "rebase other commit"? */
1975 branch_name = argv[0];
1976 options.switch_to = argv[0];
1977
1978 /* Is it a local branch? */
1979 strbuf_reset(&buf);
1980 strbuf_addf(&buf, "refs/heads/%s", branch_name);
1981 if (!read_ref(buf.buf, &options.orig_head))
1982 options.head_name = xstrdup(buf.buf);
1983 /* If not is it a valid ref (branch or commit)? */
1984 else if (!get_oid(branch_name, &options.orig_head))
1985 options.head_name = NULL;
1986 else
1987 die(_("fatal: no such branch/commit '%s'"),
1988 branch_name);
1989 } else if (argc == 0) {
1990 /* Do not need to switch branches, we are already on it. */
1991 options.head_name =
1992 xstrdup_or_null(resolve_ref_unsafe("HEAD", 0, NULL,
1993 &flags));
1994 if (!options.head_name)
1995 die(_("No such ref: %s"), "HEAD");
1996 if (flags & REF_ISSYMREF) {
1997 if (!skip_prefix(options.head_name,
1998 "refs/heads/", &branch_name))
1999 branch_name = options.head_name;
2000
2001 } else {
2002 FREE_AND_NULL(options.head_name);
2003 branch_name = "HEAD";
2004 }
2005 if (get_oid("HEAD", &options.orig_head))
2006 die(_("Could not resolve HEAD to a revision"));
2007 } else
2008 BUG("unexpected number of arguments left to parse");
2009
2010 if (fork_point > 0) {
2011 struct commit *head =
2012 lookup_commit_reference(the_repository,
2013 &options.orig_head);
2014 options.restrict_revision =
2015 get_fork_point(options.upstream_name, head);
2016 }
2017
2018 if (repo_read_index(the_repository) < 0)
2019 die(_("could not read index"));
2020
2021 if (options.autostash) {
2022 struct lock_file lock_file = LOCK_INIT;
2023 int fd;
2024
2025 fd = hold_locked_index(&lock_file, 0);
2026 refresh_cache(REFRESH_QUIET);
2027 if (0 <= fd)
2028 repo_update_index_if_able(the_repository, &lock_file);
2029 rollback_lock_file(&lock_file);
2030
2031 if (has_unstaged_changes(the_repository, 1) ||
2032 has_uncommitted_changes(the_repository, 1)) {
2033 const char *autostash =
2034 state_dir_path("autostash", &options);
2035 struct child_process stash = CHILD_PROCESS_INIT;
2036 struct object_id oid;
2037
2038 argv_array_pushl(&stash.args,
2039 "stash", "create", "autostash", NULL);
2040 stash.git_cmd = 1;
2041 stash.no_stdin = 1;
2042 strbuf_reset(&buf);
2043 if (capture_command(&stash, &buf, GIT_MAX_HEXSZ))
2044 die(_("Cannot autostash"));
2045 strbuf_trim_trailing_newline(&buf);
2046 if (get_oid(buf.buf, &oid))
2047 die(_("Unexpected stash response: '%s'"),
2048 buf.buf);
2049 strbuf_reset(&buf);
2050 strbuf_add_unique_abbrev(&buf, &oid, DEFAULT_ABBREV);
2051
2052 if (safe_create_leading_directories_const(autostash))
2053 die(_("Could not create directory for '%s'"),
2054 options.state_dir);
2055 write_file(autostash, "%s", oid_to_hex(&oid));
2056 printf(_("Created autostash: %s\n"), buf.buf);
2057 if (reset_head(NULL, "reset --hard",
2058 NULL, RESET_HEAD_HARD, NULL, NULL) < 0)
2059 die(_("could not reset --hard"));
2060
2061 if (discard_index(the_repository->index) < 0 ||
2062 repo_read_index(the_repository) < 0)
2063 die(_("could not read index"));
2064 }
2065 }
2066
2067 if (require_clean_work_tree(the_repository, "rebase",
2068 _("Please commit or stash them."), 1, 1)) {
2069 ret = 1;
2070 goto cleanup;
2071 }
2072
2073 /*
2074 * Now we are rebasing commits upstream..orig_head (or with --root,
2075 * everything leading up to orig_head) on top of onto.
2076 */
2077
2078 /*
2079 * Check if we are already based on onto with linear history,
2080 * in which case we could fast-forward without replacing the commits
2081 * with new commits recreated by replaying their changes. This
2082 * optimization must not be done if this is an interactive rebase.
2083 */
2084 if (can_fast_forward(options.onto, options.upstream, options.restrict_revision,
2085 &options.orig_head, &merge_base) &&
2086 !is_interactive(&options)) {
2087 int flag;
2088
2089 if (!(options.flags & REBASE_FORCE)) {
2090 /* Lazily switch to the target branch if needed... */
2091 if (options.switch_to) {
2092 struct object_id oid;
2093
2094 if (get_oid(options.switch_to, &oid) < 0) {
2095 ret = !!error(_("could not parse '%s'"),
2096 options.switch_to);
2097 goto cleanup;
2098 }
2099
2100 strbuf_reset(&buf);
2101 strbuf_addf(&buf, "%s: checkout %s",
2102 getenv(GIT_REFLOG_ACTION_ENVIRONMENT),
2103 options.switch_to);
2104 if (reset_head(&oid, "checkout",
2105 options.head_name,
2106 RESET_HEAD_RUN_POST_CHECKOUT_HOOK,
2107 NULL, buf.buf) < 0) {
2108 ret = !!error(_("could not switch to "
2109 "%s"),
2110 options.switch_to);
2111 goto cleanup;
2112 }
2113 }
2114
2115 if (!(options.flags & REBASE_NO_QUIET))
2116 ; /* be quiet */
2117 else if (!strcmp(branch_name, "HEAD") &&
2118 resolve_ref_unsafe("HEAD", 0, NULL, &flag))
2119 puts(_("HEAD is up to date."));
2120 else
2121 printf(_("Current branch %s is up to date.\n"),
2122 branch_name);
2123 ret = !!finish_rebase(&options);
2124 goto cleanup;
2125 } else if (!(options.flags & REBASE_NO_QUIET))
2126 ; /* be quiet */
2127 else if (!strcmp(branch_name, "HEAD") &&
2128 resolve_ref_unsafe("HEAD", 0, NULL, &flag))
2129 puts(_("HEAD is up to date, rebase forced."));
2130 else
2131 printf(_("Current branch %s is up to date, rebase "
2132 "forced.\n"), branch_name);
2133 }
2134
2135 /* If a hook exists, give it a chance to interrupt*/
2136 if (!ok_to_skip_pre_rebase &&
2137 run_hook_le(NULL, "pre-rebase", options.upstream_arg,
2138 argc ? argv[0] : NULL, NULL))
2139 die(_("The pre-rebase hook refused to rebase."));
2140
2141 if (options.flags & REBASE_DIFFSTAT) {
2142 struct diff_options opts;
2143
2144 if (options.flags & REBASE_VERBOSE) {
2145 if (is_null_oid(&merge_base))
2146 printf(_("Changes to %s:\n"),
2147 oid_to_hex(&options.onto->object.oid));
2148 else
2149 printf(_("Changes from %s to %s:\n"),
2150 oid_to_hex(&merge_base),
2151 oid_to_hex(&options.onto->object.oid));
2152 }
2153
2154 /* We want color (if set), but no pager */
2155 diff_setup(&opts);
2156 opts.stat_width = -1; /* use full terminal width */
2157 opts.stat_graph_width = -1; /* respect statGraphWidth config */
2158 opts.output_format |=
2159 DIFF_FORMAT_SUMMARY | DIFF_FORMAT_DIFFSTAT;
2160 opts.detect_rename = DIFF_DETECT_RENAME;
2161 diff_setup_done(&opts);
2162 diff_tree_oid(is_null_oid(&merge_base) ?
2163 the_hash_algo->empty_tree : &merge_base,
2164 &options.onto->object.oid, "", &opts);
2165 diffcore_std(&opts);
2166 diff_flush(&opts);
2167 }
2168
2169 if (is_interactive(&options))
2170 goto run_rebase;
2171
2172 /* Detach HEAD and reset the tree */
2173 if (options.flags & REBASE_NO_QUIET)
2174 printf(_("First, rewinding head to replay your work on top of "
2175 "it...\n"));
2176
2177 strbuf_addf(&msg, "%s: checkout %s",
2178 getenv(GIT_REFLOG_ACTION_ENVIRONMENT), options.onto_name);
2179 if (reset_head(&options.onto->object.oid, "checkout", NULL,
2180 RESET_HEAD_DETACH | RESET_ORIG_HEAD |
2181 RESET_HEAD_RUN_POST_CHECKOUT_HOOK,
2182 NULL, msg.buf))
2183 die(_("Could not detach HEAD"));
2184 strbuf_release(&msg);
2185
2186 /*
2187 * If the onto is a proper descendant of the tip of the branch, then
2188 * we just fast-forwarded.
2189 */
2190 strbuf_reset(&msg);
2191 if (oideq(&merge_base, &options.orig_head)) {
2192 printf(_("Fast-forwarded %s to %s.\n"),
2193 branch_name, options.onto_name);
2194 strbuf_addf(&msg, "rebase finished: %s onto %s",
2195 options.head_name ? options.head_name : "detached HEAD",
2196 oid_to_hex(&options.onto->object.oid));
2197 reset_head(NULL, "Fast-forwarded", options.head_name,
2198 RESET_HEAD_REFS_ONLY, "HEAD", msg.buf);
2199 strbuf_release(&msg);
2200 ret = !!finish_rebase(&options);
2201 goto cleanup;
2202 }
2203
2204 strbuf_addf(&revisions, "%s..%s",
2205 options.root ? oid_to_hex(&options.onto->object.oid) :
2206 (options.restrict_revision ?
2207 oid_to_hex(&options.restrict_revision->object.oid) :
2208 oid_to_hex(&options.upstream->object.oid)),
2209 oid_to_hex(&options.orig_head));
2210
2211 options.revisions = revisions.buf;
2212
2213 run_rebase:
2214 ret = !!run_specific_rebase(&options, action);
2215
2216 cleanup:
2217 strbuf_release(&buf);
2218 strbuf_release(&revisions);
2219 free(options.head_name);
2220 free(options.gpg_sign_opt);
2221 free(options.cmd);
2222 free(squash_onto_name);
2223 return ret;
2224 }
Unnamed repository; edit this file 'description' to name the repository.