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Commit | Line | Data |
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55071ea2 PK |
1 | /* |
2 | * "git rebase" builtin command | |
3 | * | |
4 | * Copyright (c) 2018 Pratik Karki | |
5 | */ | |
6 | ||
7 | #include "builtin.h" | |
8 | #include "run-command.h" | |
9 | #include "exec-cmd.h" | |
10 | #include "argv-array.h" | |
11 | #include "dir.h" | |
ac7f467f PK |
12 | #include "packfile.h" |
13 | #include "refs.h" | |
14 | #include "quote.h" | |
15 | #include "config.h" | |
16 | #include "cache-tree.h" | |
17 | #include "unpack-trees.h" | |
18 | #include "lockfile.h" | |
f28d40d3 | 19 | #include "parse-options.h" |
075bc852 | 20 | #include "commit.h" |
bff014da | 21 | #include "diff.h" |
e0333e5c | 22 | #include "wt-status.h" |
9a48a615 | 23 | #include "revision.h" |
f28d40d3 PK |
24 | |
25 | static char const * const builtin_rebase_usage[] = { | |
26 | N_("git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] " | |
27 | "[<upstream>] [<branch>]"), | |
28 | N_("git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] " | |
29 | "--root [<branch>]"), | |
30 | N_("git rebase --continue | --abort | --skip | --edit-todo"), | |
31 | NULL | |
32 | }; | |
ac7f467f PK |
33 | |
34 | static GIT_PATH_FUNC(apply_dir, "rebase-apply") | |
35 | static GIT_PATH_FUNC(merge_dir, "rebase-merge") | |
36 | ||
37 | enum rebase_type { | |
38 | REBASE_UNSPECIFIED = -1, | |
39 | REBASE_AM, | |
40 | REBASE_MERGE, | |
41 | REBASE_INTERACTIVE, | |
42 | REBASE_PRESERVE_MERGES | |
43 | }; | |
55071ea2 PK |
44 | |
45 | static int use_builtin_rebase(void) | |
46 | { | |
47 | struct child_process cp = CHILD_PROCESS_INIT; | |
48 | struct strbuf out = STRBUF_INIT; | |
49 | int ret; | |
50 | ||
51 | argv_array_pushl(&cp.args, | |
52 | "config", "--bool", "rebase.usebuiltin", NULL); | |
53 | cp.git_cmd = 1; | |
54 | if (capture_command(&cp, &out, 6)) { | |
55 | strbuf_release(&out); | |
56 | return 0; | |
57 | } | |
58 | ||
59 | strbuf_trim(&out); | |
60 | ret = !strcmp("true", out.buf); | |
61 | strbuf_release(&out); | |
62 | return ret; | |
63 | } | |
64 | ||
ac7f467f PK |
65 | static int apply_autostash(void) |
66 | { | |
67 | warning("TODO"); | |
68 | return 0; | |
69 | } | |
70 | ||
71 | struct rebase_options { | |
72 | enum rebase_type type; | |
73 | const char *state_dir; | |
74 | struct commit *upstream; | |
75 | const char *upstream_name; | |
06e4775a | 76 | const char *upstream_arg; |
ac7f467f PK |
77 | char *head_name; |
78 | struct object_id orig_head; | |
79 | struct commit *onto; | |
80 | const char *onto_name; | |
81 | const char *revisions; | |
e65123a7 | 82 | const char *switch_to; |
ac7f467f PK |
83 | int root; |
84 | struct commit *restrict_revision; | |
85 | int dont_finish_rebase; | |
b4c8eb02 PK |
86 | enum { |
87 | REBASE_NO_QUIET = 1<<0, | |
bff014da PK |
88 | REBASE_VERBOSE = 1<<1, |
89 | REBASE_DIFFSTAT = 1<<2, | |
1ed9c14f | 90 | REBASE_FORCE = 1<<3, |
c54dacb5 | 91 | REBASE_INTERACTIVE_EXPLICIT = 1<<4, |
b4c8eb02 PK |
92 | } flags; |
93 | struct strbuf git_am_opt; | |
ac7f467f PK |
94 | }; |
95 | ||
9a48a615 PK |
96 | static int is_interactive(struct rebase_options *opts) |
97 | { | |
98 | return opts->type == REBASE_INTERACTIVE || | |
99 | opts->type == REBASE_PRESERVE_MERGES; | |
100 | } | |
101 | ||
ac7f467f PK |
102 | /* Returns the filename prefixed by the state_dir */ |
103 | static const char *state_dir_path(const char *filename, struct rebase_options *opts) | |
104 | { | |
105 | static struct strbuf path = STRBUF_INIT; | |
106 | static size_t prefix_len; | |
107 | ||
108 | if (!prefix_len) { | |
109 | strbuf_addf(&path, "%s/", opts->state_dir); | |
110 | prefix_len = path.len; | |
111 | } | |
112 | ||
113 | strbuf_setlen(&path, prefix_len); | |
114 | strbuf_addstr(&path, filename); | |
115 | return path.buf; | |
116 | } | |
117 | ||
118 | static int finish_rebase(struct rebase_options *opts) | |
119 | { | |
120 | struct strbuf dir = STRBUF_INIT; | |
121 | const char *argv_gc_auto[] = { "gc", "--auto", NULL }; | |
122 | ||
123 | delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF); | |
124 | apply_autostash(); | |
125 | close_all_packs(the_repository->objects); | |
126 | /* | |
127 | * We ignore errors in 'gc --auto', since the | |
128 | * user should see them. | |
129 | */ | |
130 | run_command_v_opt(argv_gc_auto, RUN_GIT_CMD); | |
131 | strbuf_addstr(&dir, opts->state_dir); | |
132 | remove_dir_recursively(&dir, 0); | |
133 | strbuf_release(&dir); | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | static struct commit *peel_committish(const char *name) | |
139 | { | |
140 | struct object *obj; | |
141 | struct object_id oid; | |
142 | ||
143 | if (get_oid(name, &oid)) | |
144 | return NULL; | |
145 | obj = parse_object(the_repository, &oid); | |
146 | return (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT); | |
147 | } | |
148 | ||
149 | static void add_var(struct strbuf *buf, const char *name, const char *value) | |
150 | { | |
151 | if (!value) | |
152 | strbuf_addf(buf, "unset %s; ", name); | |
153 | else { | |
154 | strbuf_addf(buf, "%s=", name); | |
155 | sq_quote_buf(buf, value); | |
156 | strbuf_addstr(buf, "; "); | |
157 | } | |
158 | } | |
159 | ||
160 | static int run_specific_rebase(struct rebase_options *opts) | |
161 | { | |
162 | const char *argv[] = { NULL, NULL }; | |
163 | struct strbuf script_snippet = STRBUF_INIT; | |
164 | int status; | |
165 | const char *backend, *backend_func; | |
166 | ||
167 | add_var(&script_snippet, "GIT_DIR", absolute_path(get_git_dir())); | |
168 | add_var(&script_snippet, "state_dir", opts->state_dir); | |
169 | ||
170 | add_var(&script_snippet, "upstream_name", opts->upstream_name); | |
171 | add_var(&script_snippet, "upstream", | |
172 | oid_to_hex(&opts->upstream->object.oid)); | |
d4c569f8 PK |
173 | add_var(&script_snippet, "head_name", |
174 | opts->head_name ? opts->head_name : "detached HEAD"); | |
ac7f467f PK |
175 | add_var(&script_snippet, "orig_head", oid_to_hex(&opts->orig_head)); |
176 | add_var(&script_snippet, "onto", oid_to_hex(&opts->onto->object.oid)); | |
177 | add_var(&script_snippet, "onto_name", opts->onto_name); | |
178 | add_var(&script_snippet, "revisions", opts->revisions); | |
179 | add_var(&script_snippet, "restrict_revision", opts->restrict_revision ? | |
180 | oid_to_hex(&opts->restrict_revision->object.oid) : NULL); | |
b4c8eb02 PK |
181 | add_var(&script_snippet, "GIT_QUIET", |
182 | opts->flags & REBASE_NO_QUIET ? "" : "t"); | |
183 | add_var(&script_snippet, "git_am_opt", opts->git_am_opt.buf); | |
bff014da PK |
184 | add_var(&script_snippet, "verbose", |
185 | opts->flags & REBASE_VERBOSE ? "t" : ""); | |
186 | add_var(&script_snippet, "diffstat", | |
187 | opts->flags & REBASE_DIFFSTAT ? "t" : ""); | |
1ed9c14f PK |
188 | add_var(&script_snippet, "force_rebase", |
189 | opts->flags & REBASE_FORCE ? "t" : ""); | |
e65123a7 PK |
190 | if (opts->switch_to) |
191 | add_var(&script_snippet, "switch_to", opts->switch_to); | |
ac7f467f PK |
192 | |
193 | switch (opts->type) { | |
194 | case REBASE_AM: | |
195 | backend = "git-rebase--am"; | |
196 | backend_func = "git_rebase__am"; | |
197 | break; | |
198 | case REBASE_INTERACTIVE: | |
199 | backend = "git-rebase--interactive"; | |
200 | backend_func = "git_rebase__interactive"; | |
201 | break; | |
202 | case REBASE_MERGE: | |
203 | backend = "git-rebase--merge"; | |
204 | backend_func = "git_rebase__merge"; | |
205 | break; | |
206 | case REBASE_PRESERVE_MERGES: | |
207 | backend = "git-rebase--preserve-merges"; | |
208 | backend_func = "git_rebase__preserve_merges"; | |
209 | break; | |
210 | default: | |
211 | BUG("Unhandled rebase type %d", opts->type); | |
212 | break; | |
213 | } | |
214 | ||
215 | strbuf_addf(&script_snippet, | |
216 | ". git-sh-setup && . git-rebase--common &&" | |
217 | " . %s && %s", backend, backend_func); | |
218 | argv[0] = script_snippet.buf; | |
219 | ||
220 | status = run_command_v_opt(argv, RUN_USING_SHELL); | |
221 | if (opts->dont_finish_rebase) | |
222 | ; /* do nothing */ | |
223 | else if (status == 0) { | |
224 | if (!file_exists(state_dir_path("stopped-sha", opts))) | |
225 | finish_rebase(opts); | |
226 | } else if (status == 2) { | |
227 | struct strbuf dir = STRBUF_INIT; | |
228 | ||
229 | apply_autostash(); | |
230 | strbuf_addstr(&dir, opts->state_dir); | |
231 | remove_dir_recursively(&dir, 0); | |
232 | strbuf_release(&dir); | |
233 | die("Nothing to do"); | |
234 | } | |
235 | ||
236 | strbuf_release(&script_snippet); | |
237 | ||
238 | return status ? -1 : 0; | |
239 | } | |
240 | ||
241 | #define GIT_REFLOG_ACTION_ENVIRONMENT "GIT_REFLOG_ACTION" | |
242 | ||
243 | static int reset_head(struct object_id *oid, const char *action, | |
244 | const char *switch_to_branch, int detach_head) | |
245 | { | |
246 | struct object_id head_oid; | |
247 | struct tree_desc desc; | |
248 | struct lock_file lock = LOCK_INIT; | |
249 | struct unpack_trees_options unpack_tree_opts; | |
250 | struct tree *tree; | |
251 | const char *reflog_action; | |
252 | struct strbuf msg = STRBUF_INIT; | |
253 | size_t prefix_len; | |
254 | struct object_id *orig = NULL, oid_orig, | |
255 | *old_orig = NULL, oid_old_orig; | |
256 | int ret = 0; | |
257 | ||
d4c569f8 PK |
258 | if (switch_to_branch && !starts_with(switch_to_branch, "refs/")) |
259 | BUG("Not a fully qualified branch: '%s'", switch_to_branch); | |
260 | ||
ac7f467f PK |
261 | if (hold_locked_index(&lock, LOCK_REPORT_ON_ERROR) < 0) |
262 | return -1; | |
263 | ||
264 | if (!oid) { | |
265 | if (get_oid("HEAD", &head_oid)) { | |
266 | rollback_lock_file(&lock); | |
267 | return error(_("could not determine HEAD revision")); | |
268 | } | |
269 | oid = &head_oid; | |
270 | } | |
271 | ||
272 | memset(&unpack_tree_opts, 0, sizeof(unpack_tree_opts)); | |
273 | setup_unpack_trees_porcelain(&unpack_tree_opts, action); | |
274 | unpack_tree_opts.head_idx = 1; | |
275 | unpack_tree_opts.src_index = the_repository->index; | |
276 | unpack_tree_opts.dst_index = the_repository->index; | |
277 | unpack_tree_opts.fn = oneway_merge; | |
278 | unpack_tree_opts.update = 1; | |
279 | unpack_tree_opts.merge = 1; | |
280 | if (!detach_head) | |
281 | unpack_tree_opts.reset = 1; | |
282 | ||
283 | if (read_index_unmerged(the_repository->index) < 0) { | |
284 | rollback_lock_file(&lock); | |
285 | return error(_("could not read index")); | |
286 | } | |
287 | ||
288 | if (!fill_tree_descriptor(&desc, oid)) { | |
289 | error(_("failed to find tree of %s"), oid_to_hex(oid)); | |
290 | rollback_lock_file(&lock); | |
291 | free((void *)desc.buffer); | |
292 | return -1; | |
293 | } | |
294 | ||
295 | if (unpack_trees(1, &desc, &unpack_tree_opts)) { | |
296 | rollback_lock_file(&lock); | |
297 | free((void *)desc.buffer); | |
298 | return -1; | |
299 | } | |
300 | ||
301 | tree = parse_tree_indirect(oid); | |
302 | prime_cache_tree(the_repository->index, tree); | |
303 | ||
304 | if (write_locked_index(the_repository->index, &lock, COMMIT_LOCK) < 0) | |
305 | ret = error(_("could not write index")); | |
306 | free((void *)desc.buffer); | |
307 | ||
308 | if (ret) | |
309 | return ret; | |
310 | ||
311 | reflog_action = getenv(GIT_REFLOG_ACTION_ENVIRONMENT); | |
312 | strbuf_addf(&msg, "%s: ", reflog_action ? reflog_action : "rebase"); | |
313 | prefix_len = msg.len; | |
314 | ||
315 | if (!get_oid("ORIG_HEAD", &oid_old_orig)) | |
316 | old_orig = &oid_old_orig; | |
317 | if (!get_oid("HEAD", &oid_orig)) { | |
318 | orig = &oid_orig; | |
319 | strbuf_addstr(&msg, "updating ORIG_HEAD"); | |
320 | update_ref(msg.buf, "ORIG_HEAD", orig, old_orig, 0, | |
321 | UPDATE_REFS_MSG_ON_ERR); | |
322 | } else if (old_orig) | |
323 | delete_ref(NULL, "ORIG_HEAD", old_orig, 0); | |
324 | strbuf_setlen(&msg, prefix_len); | |
325 | strbuf_addstr(&msg, "updating HEAD"); | |
326 | if (!switch_to_branch) | |
327 | ret = update_ref(msg.buf, "HEAD", oid, orig, REF_NO_DEREF, | |
328 | UPDATE_REFS_MSG_ON_ERR); | |
329 | else { | |
330 | ret = create_symref("HEAD", switch_to_branch, msg.buf); | |
331 | if (!ret) | |
332 | ret = update_ref(msg.buf, "HEAD", oid, NULL, 0, | |
333 | UPDATE_REFS_MSG_ON_ERR); | |
334 | } | |
335 | ||
336 | strbuf_release(&msg); | |
337 | return ret; | |
338 | } | |
339 | ||
bff014da PK |
340 | static int rebase_config(const char *var, const char *value, void *data) |
341 | { | |
342 | struct rebase_options *opts = data; | |
343 | ||
344 | if (!strcmp(var, "rebase.stat")) { | |
345 | if (git_config_bool(var, value)) | |
346 | opts->flags |= REBASE_DIFFSTAT; | |
347 | else | |
348 | opts->flags &= !REBASE_DIFFSTAT; | |
349 | return 0; | |
350 | } | |
351 | ||
352 | return git_default_config(var, value, data); | |
353 | } | |
354 | ||
9a48a615 PK |
355 | /* |
356 | * Determines whether the commits in from..to are linear, i.e. contain | |
357 | * no merge commits. This function *expects* `from` to be an ancestor of | |
358 | * `to`. | |
359 | */ | |
360 | static int is_linear_history(struct commit *from, struct commit *to) | |
361 | { | |
362 | while (to && to != from) { | |
363 | parse_commit(to); | |
364 | if (!to->parents) | |
365 | return 1; | |
366 | if (to->parents->next) | |
367 | return 0; | |
368 | to = to->parents->item; | |
369 | } | |
370 | return 1; | |
371 | } | |
372 | ||
373 | static int can_fast_forward(struct commit *onto, struct object_id *head_oid, | |
374 | struct object_id *merge_base) | |
375 | { | |
376 | struct commit *head = lookup_commit(the_repository, head_oid); | |
377 | struct commit_list *merge_bases; | |
378 | int res; | |
379 | ||
380 | if (!head) | |
381 | return 0; | |
382 | ||
383 | merge_bases = get_merge_bases(onto, head); | |
384 | if (merge_bases && !merge_bases->next) { | |
385 | oidcpy(merge_base, &merge_bases->item->object.oid); | |
386 | res = !oidcmp(merge_base, &onto->object.oid); | |
387 | } else { | |
388 | oidcpy(merge_base, &null_oid); | |
389 | res = 0; | |
390 | } | |
391 | free_commit_list(merge_bases); | |
392 | return res && is_linear_history(onto, head); | |
393 | } | |
394 | ||
55071ea2 PK |
395 | int cmd_rebase(int argc, const char **argv, const char *prefix) |
396 | { | |
ac7f467f PK |
397 | struct rebase_options options = { |
398 | .type = REBASE_UNSPECIFIED, | |
b4c8eb02 PK |
399 | .flags = REBASE_NO_QUIET, |
400 | .git_am_opt = STRBUF_INIT, | |
ac7f467f PK |
401 | }; |
402 | const char *branch_name; | |
c54dacb5 | 403 | int ret, flags, in_progress = 0; |
06e4775a | 404 | int ok_to_skip_pre_rebase = 0; |
ac7f467f PK |
405 | struct strbuf msg = STRBUF_INIT; |
406 | struct strbuf revisions = STRBUF_INIT; | |
c54dacb5 | 407 | struct strbuf buf = STRBUF_INIT; |
075bc852 | 408 | struct object_id merge_base; |
f28d40d3 PK |
409 | struct option builtin_rebase_options[] = { |
410 | OPT_STRING(0, "onto", &options.onto_name, | |
411 | N_("revision"), | |
412 | N_("rebase onto given branch instead of upstream")), | |
06e4775a PK |
413 | OPT_BOOL(0, "no-verify", &ok_to_skip_pre_rebase, |
414 | N_("allow pre-rebase hook to run")), | |
b4c8eb02 PK |
415 | OPT_NEGBIT('q', "quiet", &options.flags, |
416 | N_("be quiet. implies --no-stat"), | |
bff014da PK |
417 | REBASE_NO_QUIET| REBASE_VERBOSE | REBASE_DIFFSTAT), |
418 | OPT_BIT('v', "verbose", &options.flags, | |
419 | N_("display a diffstat of what changed upstream"), | |
420 | REBASE_NO_QUIET | REBASE_VERBOSE | REBASE_DIFFSTAT), | |
421 | {OPTION_NEGBIT, 'n', "no-stat", &options.flags, NULL, | |
422 | N_("do not show diffstat of what changed upstream"), | |
423 | PARSE_OPT_NOARG, NULL, REBASE_DIFFSTAT }, | |
1ed9c14f PK |
424 | OPT_BIT('f', "force-rebase", &options.flags, |
425 | N_("cherry-pick all commits, even if unchanged"), | |
426 | REBASE_FORCE), | |
427 | OPT_BIT(0, "no-ff", &options.flags, | |
428 | N_("cherry-pick all commits, even if unchanged"), | |
429 | REBASE_FORCE), | |
f28d40d3 PK |
430 | OPT_END(), |
431 | }; | |
ac7f467f | 432 | |
55071ea2 PK |
433 | /* |
434 | * NEEDSWORK: Once the builtin rebase has been tested enough | |
435 | * and git-legacy-rebase.sh is retired to contrib/, this preamble | |
436 | * can be removed. | |
437 | */ | |
438 | ||
439 | if (!use_builtin_rebase()) { | |
440 | const char *path = mkpath("%s/git-legacy-rebase", | |
441 | git_exec_path()); | |
442 | ||
443 | if (sane_execvp(path, (char **)argv) < 0) | |
444 | die_errno(_("could not exec %s"), path); | |
445 | else | |
446 | BUG("sane_execvp() returned???"); | |
447 | } | |
448 | ||
f28d40d3 PK |
449 | if (argc == 2 && !strcmp(argv[1], "-h")) |
450 | usage_with_options(builtin_rebase_usage, | |
451 | builtin_rebase_options); | |
452 | ||
55071ea2 PK |
453 | prefix = setup_git_directory(); |
454 | trace_repo_setup(prefix); | |
455 | setup_work_tree(); | |
456 | ||
bff014da PK |
457 | git_config(rebase_config, &options); |
458 | ||
c54dacb5 PK |
459 | if (is_directory(apply_dir())) { |
460 | options.type = REBASE_AM; | |
461 | options.state_dir = apply_dir(); | |
462 | } else if (is_directory(merge_dir())) { | |
463 | strbuf_reset(&buf); | |
464 | strbuf_addf(&buf, "%s/rewritten", merge_dir()); | |
465 | if (is_directory(buf.buf)) { | |
466 | options.type = REBASE_PRESERVE_MERGES; | |
467 | options.flags |= REBASE_INTERACTIVE_EXPLICIT; | |
468 | } else { | |
469 | strbuf_reset(&buf); | |
470 | strbuf_addf(&buf, "%s/interactive", merge_dir()); | |
471 | if(file_exists(buf.buf)) { | |
472 | options.type = REBASE_INTERACTIVE; | |
473 | options.flags |= REBASE_INTERACTIVE_EXPLICIT; | |
474 | } else | |
475 | options.type = REBASE_MERGE; | |
476 | } | |
477 | options.state_dir = merge_dir(); | |
478 | } | |
479 | ||
480 | if (options.type != REBASE_UNSPECIFIED) | |
481 | in_progress = 1; | |
482 | ||
f28d40d3 PK |
483 | argc = parse_options(argc, argv, prefix, |
484 | builtin_rebase_options, | |
485 | builtin_rebase_usage, 0); | |
486 | ||
487 | if (argc > 2) | |
488 | usage_with_options(builtin_rebase_usage, | |
489 | builtin_rebase_options); | |
ac7f467f | 490 | |
c54dacb5 PK |
491 | /* Make sure no rebase is in progress */ |
492 | if (in_progress) { | |
493 | const char *last_slash = strrchr(options.state_dir, '/'); | |
494 | const char *state_dir_base = | |
495 | last_slash ? last_slash + 1 : options.state_dir; | |
496 | const char *cmd_live_rebase = | |
497 | "git rebase (--continue | --abort | --skip)"; | |
498 | strbuf_reset(&buf); | |
499 | strbuf_addf(&buf, "rm -fr \"%s\"", options.state_dir); | |
500 | die(_("It seems that there is already a %s directory, and\n" | |
501 | "I wonder if you are in the middle of another rebase. " | |
502 | "If that is the\n" | |
503 | "case, please try\n\t%s\n" | |
504 | "If that is not the case, please\n\t%s\n" | |
505 | "and run me again. I am stopping in case you still " | |
506 | "have something\n" | |
507 | "valuable there.\n"), | |
508 | state_dir_base, cmd_live_rebase, buf.buf); | |
509 | } | |
510 | ||
b4c8eb02 PK |
511 | if (!(options.flags & REBASE_NO_QUIET)) |
512 | strbuf_addstr(&options.git_am_opt, " -q"); | |
513 | ||
ac7f467f PK |
514 | switch (options.type) { |
515 | case REBASE_MERGE: | |
516 | case REBASE_INTERACTIVE: | |
517 | case REBASE_PRESERVE_MERGES: | |
518 | options.state_dir = merge_dir(); | |
519 | break; | |
520 | case REBASE_AM: | |
521 | options.state_dir = apply_dir(); | |
522 | break; | |
523 | default: | |
524 | /* the default rebase backend is `--am` */ | |
525 | options.type = REBASE_AM; | |
526 | options.state_dir = apply_dir(); | |
527 | break; | |
528 | } | |
529 | ||
530 | if (!options.root) { | |
f28d40d3 | 531 | if (argc < 1) |
ac7f467f PK |
532 | die("TODO: handle @{upstream}"); |
533 | else { | |
f28d40d3 | 534 | options.upstream_name = argv[0]; |
ac7f467f PK |
535 | argc--; |
536 | argv++; | |
537 | if (!strcmp(options.upstream_name, "-")) | |
538 | options.upstream_name = "@{-1}"; | |
539 | } | |
540 | options.upstream = peel_committish(options.upstream_name); | |
541 | if (!options.upstream) | |
542 | die(_("invalid upstream '%s'"), options.upstream_name); | |
06e4775a | 543 | options.upstream_arg = options.upstream_name; |
ac7f467f PK |
544 | } else |
545 | die("TODO: upstream for --root"); | |
546 | ||
547 | /* Make sure the branch to rebase onto is valid. */ | |
548 | if (!options.onto_name) | |
549 | options.onto_name = options.upstream_name; | |
550 | if (strstr(options.onto_name, "...")) { | |
075bc852 PK |
551 | if (get_oid_mb(options.onto_name, &merge_base) < 0) |
552 | die(_("'%s': need exactly one merge base"), | |
553 | options.onto_name); | |
554 | options.onto = lookup_commit_or_die(&merge_base, | |
555 | options.onto_name); | |
ac7f467f PK |
556 | } else { |
557 | options.onto = peel_committish(options.onto_name); | |
558 | if (!options.onto) | |
559 | die(_("Does not point to a valid commit '%s'"), | |
560 | options.onto_name); | |
561 | } | |
562 | ||
563 | /* | |
564 | * If the branch to rebase is given, that is the branch we will rebase | |
565 | * branch_name -- branch/commit being rebased, or | |
566 | * HEAD (already detached) | |
567 | * orig_head -- commit object name of tip of the branch before rebasing | |
d4c569f8 | 568 | * head_name -- refs/heads/<that-branch> or NULL (detached HEAD) |
ac7f467f | 569 | */ |
e65123a7 PK |
570 | if (argc == 1) { |
571 | /* Is it "rebase other branchname" or "rebase other commit"? */ | |
572 | branch_name = argv[0]; | |
573 | options.switch_to = argv[0]; | |
574 | ||
575 | /* Is it a local branch? */ | |
576 | strbuf_reset(&buf); | |
577 | strbuf_addf(&buf, "refs/heads/%s", branch_name); | |
578 | if (!read_ref(buf.buf, &options.orig_head)) | |
579 | options.head_name = xstrdup(buf.buf); | |
580 | /* If not is it a valid ref (branch or commit)? */ | |
581 | else if (!get_oid(branch_name, &options.orig_head)) | |
582 | options.head_name = NULL; | |
583 | else | |
584 | die(_("fatal: no such branch/commit '%s'"), | |
585 | branch_name); | |
586 | } else if (argc == 0) { | |
ac7f467f PK |
587 | /* Do not need to switch branches, we are already on it. */ |
588 | options.head_name = | |
589 | xstrdup_or_null(resolve_ref_unsafe("HEAD", 0, NULL, | |
590 | &flags)); | |
591 | if (!options.head_name) | |
592 | die(_("No such ref: %s"), "HEAD"); | |
593 | if (flags & REF_ISSYMREF) { | |
594 | if (!skip_prefix(options.head_name, | |
595 | "refs/heads/", &branch_name)) | |
596 | branch_name = options.head_name; | |
597 | ||
598 | } else { | |
d4c569f8 PK |
599 | free(options.head_name); |
600 | options.head_name = NULL; | |
ac7f467f PK |
601 | branch_name = "HEAD"; |
602 | } | |
603 | if (get_oid("HEAD", &options.orig_head)) | |
604 | die(_("Could not resolve HEAD to a revision")); | |
e65123a7 PK |
605 | } else |
606 | BUG("unexpected number of arguments left to parse"); | |
ac7f467f | 607 | |
e0333e5c PK |
608 | if (read_index(the_repository->index) < 0) |
609 | die(_("could not read index")); | |
610 | ||
611 | if (require_clean_work_tree("rebase", | |
612 | _("Please commit or stash them."), 1, 1)) { | |
613 | ret = 1; | |
614 | goto cleanup; | |
615 | } | |
616 | ||
9a48a615 PK |
617 | /* |
618 | * Now we are rebasing commits upstream..orig_head (or with --root, | |
619 | * everything leading up to orig_head) on top of onto. | |
620 | */ | |
621 | ||
622 | /* | |
623 | * Check if we are already based on onto with linear history, | |
624 | * but this should be done only when upstream and onto are the same | |
625 | * and if this is not an interactive rebase. | |
626 | */ | |
627 | if (can_fast_forward(options.onto, &options.orig_head, &merge_base) && | |
628 | !is_interactive(&options) && !options.restrict_revision && | |
629 | !oidcmp(&options.upstream->object.oid, &options.onto->object.oid)) { | |
630 | int flag; | |
631 | ||
1ed9c14f | 632 | if (!(options.flags & REBASE_FORCE)) { |
e65123a7 PK |
633 | /* Lazily switch to the target branch if needed... */ |
634 | if (options.switch_to) { | |
635 | struct object_id oid; | |
636 | ||
637 | if (get_oid(options.switch_to, &oid) < 0) { | |
638 | ret = !!error(_("could not parse '%s'"), | |
639 | options.switch_to); | |
640 | goto cleanup; | |
641 | } | |
642 | ||
643 | strbuf_reset(&buf); | |
644 | strbuf_addf(&buf, "rebase: checkout %s", | |
645 | options.switch_to); | |
646 | if (reset_head(&oid, "checkout", | |
647 | options.head_name, 0) < 0) { | |
648 | ret = !!error(_("could not switch to " | |
649 | "%s"), | |
650 | options.switch_to); | |
651 | goto cleanup; | |
652 | } | |
653 | } | |
654 | ||
1ed9c14f PK |
655 | if (!(options.flags & REBASE_NO_QUIET)) |
656 | ; /* be quiet */ | |
657 | else if (!strcmp(branch_name, "HEAD") && | |
658 | resolve_ref_unsafe("HEAD", 0, NULL, &flag)) | |
659 | puts(_("HEAD is up to date.")); | |
660 | else | |
661 | printf(_("Current branch %s is up to date.\n"), | |
662 | branch_name); | |
663 | ret = !!finish_rebase(&options); | |
664 | goto cleanup; | |
665 | } else if (!(options.flags & REBASE_NO_QUIET)) | |
9a48a615 PK |
666 | ; /* be quiet */ |
667 | else if (!strcmp(branch_name, "HEAD") && | |
668 | resolve_ref_unsafe("HEAD", 0, NULL, &flag)) | |
669 | puts(_("HEAD is up to date, rebase forced.")); | |
670 | else | |
671 | printf(_("Current branch %s is up to date, rebase " | |
672 | "forced.\n"), branch_name); | |
673 | } | |
674 | ||
06e4775a PK |
675 | /* If a hook exists, give it a chance to interrupt*/ |
676 | if (!ok_to_skip_pre_rebase && | |
677 | run_hook_le(NULL, "pre-rebase", options.upstream_arg, | |
678 | argc ? argv[0] : NULL, NULL)) | |
679 | die(_("The pre-rebase hook refused to rebase.")); | |
680 | ||
bff014da PK |
681 | if (options.flags & REBASE_DIFFSTAT) { |
682 | struct diff_options opts; | |
683 | ||
684 | if (options.flags & REBASE_VERBOSE) | |
685 | printf(_("Changes from %s to %s:\n"), | |
686 | oid_to_hex(&merge_base), | |
687 | oid_to_hex(&options.onto->object.oid)); | |
688 | ||
689 | /* We want color (if set), but no pager */ | |
690 | diff_setup(&opts); | |
691 | opts.stat_width = -1; /* use full terminal width */ | |
692 | opts.stat_graph_width = -1; /* respect statGraphWidth config */ | |
693 | opts.output_format |= | |
694 | DIFF_FORMAT_SUMMARY | DIFF_FORMAT_DIFFSTAT; | |
695 | opts.detect_rename = DIFF_DETECT_RENAME; | |
696 | diff_setup_done(&opts); | |
697 | diff_tree_oid(&merge_base, &options.onto->object.oid, | |
698 | "", &opts); | |
699 | diffcore_std(&opts); | |
700 | diff_flush(&opts); | |
701 | } | |
702 | ||
703 | /* Detach HEAD and reset the tree */ | |
704 | if (options.flags & REBASE_NO_QUIET) | |
705 | printf(_("First, rewinding head to replay your work on top of " | |
706 | "it...\n")); | |
707 | ||
ac7f467f PK |
708 | strbuf_addf(&msg, "rebase: checkout %s", options.onto_name); |
709 | if (reset_head(&options.onto->object.oid, "checkout", NULL, 1)) | |
710 | die(_("Could not detach HEAD")); | |
711 | strbuf_release(&msg); | |
712 | ||
713 | strbuf_addf(&revisions, "%s..%s", | |
714 | options.root ? oid_to_hex(&options.onto->object.oid) : | |
715 | (options.restrict_revision ? | |
716 | oid_to_hex(&options.restrict_revision->object.oid) : | |
717 | oid_to_hex(&options.upstream->object.oid)), | |
718 | oid_to_hex(&options.orig_head)); | |
719 | ||
720 | options.revisions = revisions.buf; | |
721 | ||
722 | ret = !!run_specific_rebase(&options); | |
723 | ||
e0333e5c | 724 | cleanup: |
ac7f467f PK |
725 | strbuf_release(&revisions); |
726 | free(options.head_name); | |
727 | return ret; | |
55071ea2 | 728 | } |