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Commit | Line | Data |
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782c2d65 | 1 | #include "builtin.h" |
697cc8ef | 2 | #include "lockfile.h" |
782c2d65 DB |
3 | #include "parse-options.h" |
4 | #include "refs.h" | |
5 | #include "commit.h" | |
6 | #include "tree.h" | |
7 | #include "tree-walk.h" | |
b9d37a54 | 8 | #include "cache-tree.h" |
782c2d65 DB |
9 | #include "unpack-trees.h" |
10 | #include "dir.h" | |
11 | #include "run-command.h" | |
12 | #include "merge-recursive.h" | |
13 | #include "branch.h" | |
14 | #include "diff.h" | |
15 | #include "revision.h" | |
79a1e6b4 | 16 | #include "remote.h" |
0cf8581e JH |
17 | #include "blob.h" |
18 | #include "xdiff-interface.h" | |
19 | #include "ll-merge.h" | |
cfc5789a | 20 | #include "resolve-undo.h" |
851e18c3 | 21 | #include "submodule-config.h" |
175f6e59 | 22 | #include "submodule.h" |
782c2d65 DB |
23 | |
24 | static const char * const checkout_usage[] = { | |
9c9b4f2f AH |
25 | N_("git checkout [<options>] <branch>"), |
26 | N_("git checkout [<options>] [<branch>] -- <file>..."), | |
782c2d65 DB |
27 | NULL, |
28 | }; | |
29 | ||
db941099 | 30 | struct checkout_opts { |
e51e3057 | 31 | int patch_mode; |
db941099 JH |
32 | int quiet; |
33 | int merge; | |
34 | int force; | |
32669671 | 35 | int force_detach; |
38901a48 | 36 | int writeout_stage; |
c1d7036b | 37 | int overwrite_ignore; |
08d595dc | 38 | int ignore_skipworktree; |
1d0fa898 | 39 | int ignore_other_worktrees; |
db941099 JH |
40 | |
41 | const char *new_branch; | |
02ac9837 | 42 | const char *new_branch_force; |
9db5ebf4 | 43 | const char *new_orphan_branch; |
db941099 JH |
44 | int new_branch_log; |
45 | enum branch_track track; | |
175f6e59 | 46 | struct diff_options diff_options; |
e51e3057 NTND |
47 | |
48 | int branch_exists; | |
49 | const char *prefix; | |
817b345a | 50 | struct pathspec pathspec; |
e51e3057 | 51 | struct tree *source_tree; |
db941099 JH |
52 | }; |
53 | ||
782c2d65 DB |
54 | static int post_checkout_hook(struct commit *old, struct commit *new, |
55 | int changed) | |
56 | { | |
15048f8a BP |
57 | return run_hook_le(NULL, "post-checkout", |
58 | sha1_to_hex(old ? old->object.sha1 : null_sha1), | |
59 | sha1_to_hex(new ? new->object.sha1 : null_sha1), | |
60 | changed ? "1" : "0", NULL); | |
2292ce47 SB |
61 | /* "new" can be NULL when checking out from the index before |
62 | a commit exists. */ | |
ae98a008 | 63 | |
782c2d65 DB |
64 | } |
65 | ||
6a0b0b6d | 66 | static int update_some(const unsigned char *sha1, struct strbuf *base, |
671f0707 | 67 | const char *pathname, unsigned mode, int stage, void *context) |
782c2d65 DB |
68 | { |
69 | int len; | |
70 | struct cache_entry *ce; | |
c5326bd6 | 71 | int pos; |
782c2d65 | 72 | |
782c2d65 DB |
73 | if (S_ISDIR(mode)) |
74 | return READ_TREE_RECURSIVE; | |
75 | ||
6a0b0b6d | 76 | len = base->len + strlen(pathname); |
782c2d65 DB |
77 | ce = xcalloc(1, cache_entry_size(len)); |
78 | hashcpy(ce->sha1, sha1); | |
6a0b0b6d NTND |
79 | memcpy(ce->name, base->buf, base->len); |
80 | memcpy(ce->name + base->len, pathname, len - base->len); | |
b60e188c TG |
81 | ce->ce_flags = create_ce_flags(0) | CE_UPDATE; |
82 | ce->ce_namelen = len; | |
782c2d65 | 83 | ce->ce_mode = create_ce_mode(mode); |
c5326bd6 JK |
84 | |
85 | /* | |
86 | * If the entry is the same as the current index, we can leave the old | |
87 | * entry in place. Whether it is UPTODATE or not, checkout_entry will | |
88 | * do the right thing. | |
89 | */ | |
90 | pos = cache_name_pos(ce->name, ce->ce_namelen); | |
91 | if (pos >= 0) { | |
92 | struct cache_entry *old = active_cache[pos]; | |
93 | if (ce->ce_mode == old->ce_mode && | |
94 | !hashcmp(ce->sha1, old->sha1)) { | |
95 | old->ce_flags |= CE_UPDATE; | |
96 | free(ce); | |
97 | return 0; | |
98 | } | |
99 | } | |
100 | ||
782c2d65 DB |
101 | add_cache_entry(ce, ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE); |
102 | return 0; | |
103 | } | |
104 | ||
18e4f405 | 105 | static int read_tree_some(struct tree *tree, const struct pathspec *pathspec) |
782c2d65 | 106 | { |
18e4f405 | 107 | read_tree_recursive(tree, "", 0, 0, pathspec, update_some, NULL); |
782c2d65 | 108 | |
782c2d65 DB |
109 | /* update the index with the given tree's info |
110 | * for all args, expanding wildcards, and exit | |
111 | * with any non-zero return code. | |
112 | */ | |
113 | return 0; | |
114 | } | |
115 | ||
9c5e6c80 | 116 | static int skip_same_name(const struct cache_entry *ce, int pos) |
8fdcf312 JH |
117 | { |
118 | while (++pos < active_nr && | |
119 | !strcmp(active_cache[pos]->name, ce->name)) | |
120 | ; /* skip */ | |
121 | return pos; | |
122 | } | |
123 | ||
9c5e6c80 | 124 | static int check_stage(int stage, const struct cache_entry *ce, int pos) |
38901a48 JH |
125 | { |
126 | while (pos < active_nr && | |
127 | !strcmp(active_cache[pos]->name, ce->name)) { | |
128 | if (ce_stage(active_cache[pos]) == stage) | |
129 | return 0; | |
130 | pos++; | |
131 | } | |
9f97ab08 ÆAB |
132 | if (stage == 2) |
133 | return error(_("path '%s' does not have our version"), ce->name); | |
134 | else | |
135 | return error(_("path '%s' does not have their version"), ce->name); | |
38901a48 JH |
136 | } |
137 | ||
9c5e6c80 | 138 | static int check_stages(unsigned stages, const struct cache_entry *ce, int pos) |
0cf8581e | 139 | { |
fbbccd0a JH |
140 | unsigned seen = 0; |
141 | const char *name = ce->name; | |
142 | ||
143 | while (pos < active_nr) { | |
144 | ce = active_cache[pos]; | |
145 | if (strcmp(name, ce->name)) | |
146 | break; | |
147 | seen |= (1 << ce_stage(ce)); | |
148 | pos++; | |
149 | } | |
150 | if ((stages & seen) != stages) | |
151 | return error(_("path '%s' does not have all necessary versions"), | |
152 | name); | |
0cf8581e JH |
153 | return 0; |
154 | } | |
155 | ||
38901a48 JH |
156 | static int checkout_stage(int stage, struct cache_entry *ce, int pos, |
157 | struct checkout *state) | |
158 | { | |
159 | while (pos < active_nr && | |
160 | !strcmp(active_cache[pos]->name, ce->name)) { | |
161 | if (ce_stage(active_cache[pos]) == stage) | |
162 | return checkout_entry(active_cache[pos], state, NULL); | |
163 | pos++; | |
164 | } | |
9f97ab08 ÆAB |
165 | if (stage == 2) |
166 | return error(_("path '%s' does not have our version"), ce->name); | |
167 | else | |
168 | return error(_("path '%s' does not have their version"), ce->name); | |
38901a48 | 169 | } |
8fdcf312 | 170 | |
0cf8581e JH |
171 | static int checkout_merged(int pos, struct checkout *state) |
172 | { | |
173 | struct cache_entry *ce = active_cache[pos]; | |
174 | const char *path = ce->name; | |
175 | mmfile_t ancestor, ours, theirs; | |
176 | int status; | |
177 | unsigned char sha1[20]; | |
178 | mmbuffer_t result_buf; | |
fbbccd0a | 179 | unsigned char threeway[3][20]; |
335c6e40 | 180 | unsigned mode = 0; |
0cf8581e | 181 | |
fbbccd0a JH |
182 | memset(threeway, 0, sizeof(threeway)); |
183 | while (pos < active_nr) { | |
184 | int stage; | |
185 | stage = ce_stage(ce); | |
186 | if (!stage || strcmp(path, ce->name)) | |
187 | break; | |
188 | hashcpy(threeway[stage - 1], ce->sha1); | |
189 | if (stage == 2) | |
190 | mode = create_ce_mode(ce->ce_mode); | |
191 | pos++; | |
192 | ce = active_cache[pos]; | |
193 | } | |
194 | if (is_null_sha1(threeway[1]) || is_null_sha1(threeway[2])) | |
195 | return error(_("path '%s' does not have necessary versions"), path); | |
0cf8581e | 196 | |
fbbccd0a JH |
197 | read_mmblob(&ancestor, threeway[0]); |
198 | read_mmblob(&ours, threeway[1]); | |
199 | read_mmblob(&theirs, threeway[2]); | |
0cf8581e | 200 | |
18b037a5 JN |
201 | /* |
202 | * NEEDSWORK: re-create conflicts from merges with | |
203 | * merge.renormalize set, too | |
204 | */ | |
f0531a29 | 205 | status = ll_merge(&result_buf, path, &ancestor, "base", |
712516bc | 206 | &ours, "ours", &theirs, "theirs", NULL); |
0cf8581e JH |
207 | free(ancestor.ptr); |
208 | free(ours.ptr); | |
209 | free(theirs.ptr); | |
210 | if (status < 0 || !result_buf.ptr) { | |
211 | free(result_buf.ptr); | |
e8a8a4d7 | 212 | return error(_("path '%s': cannot merge"), path); |
0cf8581e JH |
213 | } |
214 | ||
215 | /* | |
216 | * NEEDSWORK: | |
217 | * There is absolutely no reason to write this as a blob object | |
3ea3c215 | 218 | * and create a phony cache entry just to leak. This hack is |
0cf8581e JH |
219 | * primarily to get to the write_entry() machinery that massages |
220 | * the contents to work-tree format and writes out which only | |
221 | * allows it for a cache entry. The code in write_entry() needs | |
222 | * to be refactored to allow us to feed a <buffer, size, mode> | |
223 | * instead of a cache entry. Such a refactoring would help | |
224 | * merge_recursive as well (it also writes the merge result to the | |
225 | * object database even when it may contain conflicts). | |
226 | */ | |
227 | if (write_sha1_file(result_buf.ptr, result_buf.size, | |
228 | blob_type, sha1)) | |
e8a8a4d7 | 229 | die(_("Unable to add merge result for '%s'"), path); |
fbbccd0a | 230 | ce = make_cache_entry(mode, sha1, path, 2, 0); |
048f2762 | 231 | if (!ce) |
e8a8a4d7 | 232 | die(_("make_cache_entry failed for path '%s'"), path); |
0cf8581e JH |
233 | status = checkout_entry(ce, state, NULL); |
234 | return status; | |
235 | } | |
8fdcf312 | 236 | |
b6312c27 NTND |
237 | static int checkout_paths(const struct checkout_opts *opts, |
238 | const char *revision) | |
782c2d65 DB |
239 | { |
240 | int pos; | |
241 | struct checkout state; | |
242 | static char *ps_matched; | |
243 | unsigned char rev[20]; | |
244 | int flag; | |
245 | struct commit *head; | |
d2b3691b | 246 | int errs = 0; |
b6312c27 NTND |
247 | struct lock_file *lock_file; |
248 | ||
249 | if (opts->track != BRANCH_TRACK_UNSPECIFIED) | |
250 | die(_("'%s' cannot be used with updating paths"), "--track"); | |
251 | ||
252 | if (opts->new_branch_log) | |
253 | die(_("'%s' cannot be used with updating paths"), "-l"); | |
254 | ||
255 | if (opts->force && opts->patch_mode) | |
256 | die(_("'%s' cannot be used with updating paths"), "-f"); | |
257 | ||
258 | if (opts->force_detach) | |
259 | die(_("'%s' cannot be used with updating paths"), "--detach"); | |
260 | ||
261 | if (opts->merge && opts->patch_mode) | |
262 | die(_("'%s' cannot be used with %s"), "--merge", "--patch"); | |
263 | ||
264 | if (opts->force && opts->merge) | |
265 | die(_("'%s' cannot be used with %s"), "-f", "-m"); | |
266 | ||
267 | if (opts->new_branch) | |
268 | die(_("Cannot update paths and switch to branch '%s' at the same time."), | |
269 | opts->new_branch); | |
270 | ||
271 | if (opts->patch_mode) | |
272 | return run_add_interactive(revision, "--patch=checkout", | |
480ca644 | 273 | &opts->pathspec); |
b6312c27 NTND |
274 | |
275 | lock_file = xcalloc(1, sizeof(struct lock_file)); | |
75336878 | 276 | |
03b86647 | 277 | hold_locked_index(lock_file, 1); |
5ab2a2da | 278 | if (read_cache_preload(&opts->pathspec) < 0) |
e8a8a4d7 | 279 | return error(_("corrupt index file")); |
75336878 | 280 | |
e51e3057 | 281 | if (opts->source_tree) |
18e4f405 | 282 | read_tree_some(opts->source_tree, &opts->pathspec); |
75336878 | 283 | |
8b54c234 | 284 | ps_matched = xcalloc(opts->pathspec.nr, 1); |
782c2d65 | 285 | |
e721c154 NTND |
286 | /* |
287 | * Make sure all pathspecs participated in locating the paths | |
288 | * to be checked out. | |
289 | */ | |
782c2d65 DB |
290 | for (pos = 0; pos < active_nr; pos++) { |
291 | struct cache_entry *ce = active_cache[pos]; | |
e721c154 | 292 | ce->ce_flags &= ~CE_MATCHED; |
08d595dc NTND |
293 | if (!opts->ignore_skipworktree && ce_skip_worktree(ce)) |
294 | continue; | |
e51e3057 | 295 | if (opts->source_tree && !(ce->ce_flags & CE_UPDATE)) |
e721c154 NTND |
296 | /* |
297 | * "git checkout tree-ish -- path", but this entry | |
298 | * is in the original index; it will not be checked | |
299 | * out to the working tree and it does not matter | |
300 | * if pathspec matched this entry. We will not do | |
301 | * anything to this entry at all. | |
302 | */ | |
0a1283bc | 303 | continue; |
e721c154 NTND |
304 | /* |
305 | * Either this entry came from the tree-ish we are | |
306 | * checking the paths out of, or we are checking out | |
307 | * of the index. | |
308 | * | |
309 | * If it comes from the tree-ish, we already know it | |
310 | * matches the pathspec and could just stamp | |
311 | * CE_MATCHED to it from update_some(). But we still | |
312 | * need ps_matched and read_tree_recursive (and | |
313 | * eventually tree_entry_interesting) cannot fill | |
314 | * ps_matched yet. Once it can, we can avoid calling | |
315 | * match_pathspec() for _all_ entries when | |
316 | * opts->source_tree != NULL. | |
317 | */ | |
429bb40a | 318 | if (ce_path_match(ce, &opts->pathspec, ps_matched)) |
e721c154 | 319 | ce->ce_flags |= CE_MATCHED; |
782c2d65 DB |
320 | } |
321 | ||
17ddc66e | 322 | if (report_path_error(ps_matched, &opts->pathspec, opts->prefix)) { |
e721c154 | 323 | free(ps_matched); |
782c2d65 | 324 | return 1; |
e721c154 NTND |
325 | } |
326 | free(ps_matched); | |
782c2d65 | 327 | |
4421a823 JH |
328 | /* "checkout -m path" to recreate conflicted state */ |
329 | if (opts->merge) | |
e721c154 | 330 | unmerge_marked_index(&the_index); |
4421a823 | 331 | |
8fdcf312 JH |
332 | /* Any unmerged paths? */ |
333 | for (pos = 0; pos < active_nr; pos++) { | |
9c5e6c80 | 334 | const struct cache_entry *ce = active_cache[pos]; |
e721c154 | 335 | if (ce->ce_flags & CE_MATCHED) { |
8fdcf312 JH |
336 | if (!ce_stage(ce)) |
337 | continue; | |
db941099 | 338 | if (opts->force) { |
e8a8a4d7 | 339 | warning(_("path '%s' is unmerged"), ce->name); |
f9022075 SB |
340 | } else if (opts->writeout_stage) { |
341 | errs |= check_stage(opts->writeout_stage, ce, pos); | |
0cf8581e | 342 | } else if (opts->merge) { |
fbbccd0a | 343 | errs |= check_stages((1<<2) | (1<<3), ce, pos); |
db941099 JH |
344 | } else { |
345 | errs = 1; | |
e8a8a4d7 | 346 | error(_("path '%s' is unmerged"), ce->name); |
db941099 | 347 | } |
8fdcf312 JH |
348 | pos = skip_same_name(ce, pos) - 1; |
349 | } | |
350 | } | |
351 | if (errs) | |
352 | return 1; | |
353 | ||
d2b3691b | 354 | /* Now we are committed to check them out */ |
782c2d65 DB |
355 | memset(&state, 0, sizeof(state)); |
356 | state.force = 1; | |
357 | state.refresh_cache = 1; | |
d4a2024a | 358 | state.istate = &the_index; |
782c2d65 DB |
359 | for (pos = 0; pos < active_nr; pos++) { |
360 | struct cache_entry *ce = active_cache[pos]; | |
e721c154 | 361 | if (ce->ce_flags & CE_MATCHED) { |
8fdcf312 JH |
362 | if (!ce_stage(ce)) { |
363 | errs |= checkout_entry(ce, &state, NULL); | |
364 | continue; | |
365 | } | |
f9022075 SB |
366 | if (opts->writeout_stage) |
367 | errs |= checkout_stage(opts->writeout_stage, ce, pos, &state); | |
368 | else if (opts->merge) | |
0cf8581e | 369 | errs |= checkout_merged(pos, &state); |
8fdcf312 | 370 | pos = skip_same_name(ce, pos) - 1; |
782c2d65 DB |
371 | } |
372 | } | |
373 | ||
03b86647 | 374 | if (write_locked_index(&the_index, lock_file, COMMIT_LOCK)) |
e8a8a4d7 | 375 | die(_("unable to write new index file")); |
75336878 | 376 | |
7695d118 | 377 | read_ref_full("HEAD", 0, rev, &flag); |
782c2d65 DB |
378 | head = lookup_commit_reference_gently(rev, 1); |
379 | ||
d2b3691b JH |
380 | errs |= post_checkout_hook(head, head, 0); |
381 | return errs; | |
782c2d65 DB |
382 | } |
383 | ||
a2b4994c NTND |
384 | static void show_local_changes(struct object *head, |
385 | const struct diff_options *opts) | |
782c2d65 DB |
386 | { |
387 | struct rev_info rev; | |
388 | /* I think we want full paths, even if we're in a subdirectory. */ | |
389 | init_revisions(&rev, NULL); | |
175f6e59 | 390 | rev.diffopt.flags = opts->flags; |
782c2d65 | 391 | rev.diffopt.output_format |= DIFF_FORMAT_NAME_STATUS; |
28452655 | 392 | diff_setup_done(&rev.diffopt); |
782c2d65 DB |
393 | add_pending_object(&rev, head, NULL); |
394 | run_diff_index(&rev, 0); | |
395 | } | |
396 | ||
b3c0494a | 397 | static void describe_detached_head(const char *msg, struct commit *commit) |
782c2d65 | 398 | { |
f285a2d7 | 399 | struct strbuf sb = STRBUF_INIT; |
3c621839 JK |
400 | if (!parse_commit(commit)) |
401 | pp_commit_easy(CMIT_FMT_ONELINE, commit, &sb); | |
782c2d65 DB |
402 | fprintf(stderr, "%s %s... %s\n", msg, |
403 | find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV), sb.buf); | |
404 | strbuf_release(&sb); | |
405 | } | |
406 | ||
a2b4994c NTND |
407 | static int reset_tree(struct tree *tree, const struct checkout_opts *o, |
408 | int worktree, int *writeout_error) | |
782c2d65 DB |
409 | { |
410 | struct unpack_trees_options opts; | |
411 | struct tree_desc tree_desc; | |
bc052d7f | 412 | |
782c2d65 DB |
413 | memset(&opts, 0, sizeof(opts)); |
414 | opts.head_idx = -1; | |
6286a08d JH |
415 | opts.update = worktree; |
416 | opts.skip_unmerged = !worktree; | |
782c2d65 DB |
417 | opts.reset = 1; |
418 | opts.merge = 1; | |
419 | opts.fn = oneway_merge; | |
e9fc64c6 | 420 | opts.verbose_update = !o->quiet && isatty(2); |
34110cd4 LT |
421 | opts.src_index = &the_index; |
422 | opts.dst_index = &the_index; | |
782c2d65 DB |
423 | parse_tree(tree); |
424 | init_tree_desc(&tree_desc, tree->buffer, tree->size); | |
291d823e JH |
425 | switch (unpack_trees(1, &tree_desc, &opts)) { |
426 | case -2: | |
a2b4994c | 427 | *writeout_error = 1; |
291d823e JH |
428 | /* |
429 | * We return 0 nevertheless, as the index is all right | |
430 | * and more importantly we have made best efforts to | |
431 | * update paths in the work tree, and we cannot revert | |
432 | * them. | |
433 | */ | |
434 | case 0: | |
435 | return 0; | |
436 | default: | |
84a5750b | 437 | return 128; |
291d823e | 438 | } |
782c2d65 DB |
439 | } |
440 | ||
782c2d65 DB |
441 | struct branch_info { |
442 | const char *name; /* The short name used */ | |
443 | const char *path; /* The full name of a real branch */ | |
444 | struct commit *commit; /* The named commit */ | |
5883034c NTND |
445 | /* |
446 | * if not null the branch is detached because it's already | |
447 | * checked out in this checkout | |
448 | */ | |
449 | char *checkout; | |
782c2d65 DB |
450 | }; |
451 | ||
452 | static void setup_branch_path(struct branch_info *branch) | |
453 | { | |
f285a2d7 | 454 | struct strbuf buf = STRBUF_INIT; |
ae5a6c36 | 455 | |
a552de75 JH |
456 | strbuf_branchname(&buf, branch->name); |
457 | if (strcmp(buf.buf, branch->name)) | |
ae5a6c36 | 458 | branch->name = xstrdup(buf.buf); |
a552de75 | 459 | strbuf_splice(&buf, 0, 0, "refs/heads/", 11); |
782c2d65 DB |
460 | branch->path = strbuf_detach(&buf, NULL); |
461 | } | |
462 | ||
a2b4994c NTND |
463 | static int merge_working_tree(const struct checkout_opts *opts, |
464 | struct branch_info *old, | |
465 | struct branch_info *new, | |
466 | int *writeout_error) | |
782c2d65 DB |
467 | { |
468 | int ret; | |
469 | struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file)); | |
b96524f8 | 470 | |
03b86647 | 471 | hold_locked_index(lock_file, 1); |
53996fe5 | 472 | if (read_cache_preload(NULL) < 0) |
e8a8a4d7 | 473 | return error(_("corrupt index file")); |
782c2d65 | 474 | |
cfc5789a | 475 | resolve_undo_clear(); |
782c2d65 | 476 | if (opts->force) { |
a2b4994c | 477 | ret = reset_tree(new->commit->tree, opts, 1, writeout_error); |
782c2d65 DB |
478 | if (ret) |
479 | return ret; | |
480 | } else { | |
481 | struct tree_desc trees[2]; | |
482 | struct tree *tree; | |
483 | struct unpack_trees_options topts; | |
bc052d7f | 484 | |
782c2d65 DB |
485 | memset(&topts, 0, sizeof(topts)); |
486 | topts.head_idx = -1; | |
34110cd4 LT |
487 | topts.src_index = &the_index; |
488 | topts.dst_index = &the_index; | |
782c2d65 | 489 | |
e294030f | 490 | setup_unpack_trees_porcelain(&topts, "checkout"); |
8ccba008 | 491 | |
782c2d65 DB |
492 | refresh_cache(REFRESH_QUIET); |
493 | ||
494 | if (unmerged_cache()) { | |
e8a8a4d7 | 495 | error(_("you need to resolve your current index first")); |
04c9e11f | 496 | return 1; |
782c2d65 | 497 | } |
04c9e11f JH |
498 | |
499 | /* 2-way merge to the new branch */ | |
fa7b3c2f | 500 | topts.initial_checkout = is_cache_unborn(); |
04c9e11f JH |
501 | topts.update = 1; |
502 | topts.merge = 1; | |
64da3ae5 | 503 | topts.gently = opts->merge && old->commit; |
e9fc64c6 | 504 | topts.verbose_update = !opts->quiet && isatty(2); |
04c9e11f | 505 | topts.fn = twoway_merge; |
c1d7036b NTND |
506 | if (opts->overwrite_ignore) { |
507 | topts.dir = xcalloc(1, sizeof(*topts.dir)); | |
508 | topts.dir->flags |= DIR_SHOW_IGNORED; | |
509 | setup_standard_excludes(topts.dir); | |
510 | } | |
272be14a | 511 | tree = parse_tree_indirect(old->commit ? |
cc580af8 | 512 | old->commit->object.sha1 : |
dab0d410 | 513 | EMPTY_TREE_SHA1_BIN); |
04c9e11f JH |
514 | init_tree_desc(&trees[0], tree->buffer, tree->size); |
515 | tree = parse_tree_indirect(new->commit->object.sha1); | |
516 | init_tree_desc(&trees[1], tree->buffer, tree->size); | |
517 | ||
291d823e | 518 | ret = unpack_trees(2, trees, &topts); |
49d833dc | 519 | if (ret == -1) { |
782c2d65 DB |
520 | /* |
521 | * Unpack couldn't do a trivial merge; either | |
522 | * give up or do a real merge, depending on | |
523 | * whether the merge flag was used. | |
524 | */ | |
525 | struct tree *result; | |
526 | struct tree *work; | |
8a2fce18 | 527 | struct merge_options o; |
782c2d65 DB |
528 | if (!opts->merge) |
529 | return 1; | |
64da3ae5 JH |
530 | |
531 | /* | |
532 | * Without old->commit, the below is the same as | |
533 | * the two-tree unpack we already tried and failed. | |
534 | */ | |
535 | if (!old->commit) | |
536 | return 1; | |
782c2d65 DB |
537 | |
538 | /* Do more real merge */ | |
539 | ||
540 | /* | |
541 | * We update the index fully, then write the | |
542 | * tree from the index, then merge the new | |
543 | * branch with the current tree, with the old | |
544 | * branch as the base. Then we reset the index | |
545 | * (but not the working tree) to the new | |
546 | * branch, leaving the working tree as the | |
547 | * merged version, but skipping unmerged | |
548 | * entries in the index. | |
549 | */ | |
550 | ||
7ae02a30 | 551 | add_files_to_cache(NULL, NULL, 0); |
7610fa57 JN |
552 | /* |
553 | * NEEDSWORK: carrying over local changes | |
554 | * when branches have different end-of-line | |
555 | * normalization (or clean+smudge rules) is | |
556 | * a pain; plumb in an option to set | |
557 | * o.renormalize? | |
558 | */ | |
8a2fce18 MV |
559 | init_merge_options(&o); |
560 | o.verbosity = 0; | |
561 | work = write_tree_from_memory(&o); | |
782c2d65 | 562 | |
a2b4994c NTND |
563 | ret = reset_tree(new->commit->tree, opts, 1, |
564 | writeout_error); | |
782c2d65 DB |
565 | if (ret) |
566 | return ret; | |
c4151629 | 567 | o.ancestor = old->name; |
8a2fce18 MV |
568 | o.branch1 = new->name; |
569 | o.branch2 = "local"; | |
570 | merge_trees(&o, new->commit->tree, work, | |
571 | old->commit->tree, &result); | |
a2b4994c NTND |
572 | ret = reset_tree(new->commit->tree, opts, 0, |
573 | writeout_error); | |
84a5750b JH |
574 | if (ret) |
575 | return ret; | |
782c2d65 DB |
576 | } |
577 | } | |
578 | ||
aecf567c DT |
579 | if (!active_cache_tree) |
580 | active_cache_tree = cache_tree(); | |
581 | ||
582 | if (!cache_tree_fully_valid(active_cache_tree)) | |
3fd13cbc | 583 | cache_tree_update(&the_index, WRITE_TREE_SILENT | WRITE_TREE_REPAIR); |
aecf567c | 584 | |
03b86647 | 585 | if (write_locked_index(&the_index, lock_file, COMMIT_LOCK)) |
e8a8a4d7 | 586 | die(_("unable to write new index file")); |
782c2d65 | 587 | |
7fe4a728 | 588 | if (!opts->force && !opts->quiet) |
175f6e59 | 589 | show_local_changes(&new->commit->object, &opts->diff_options); |
782c2d65 DB |
590 | |
591 | return 0; | |
592 | } | |
593 | ||
6d21bf96 | 594 | static void report_tracking(struct branch_info *new) |
79a1e6b4 | 595 | { |
6d21bf96 | 596 | struct strbuf sb = STRBUF_INIT; |
b56fca07 | 597 | struct branch *branch = branch_get(new->name); |
79a1e6b4 | 598 | |
6d21bf96 | 599 | if (!format_tracking_info(branch, &sb)) |
79a1e6b4 | 600 | return; |
6d21bf96 JH |
601 | fputs(sb.buf, stdout); |
602 | strbuf_release(&sb); | |
b0030db3 | 603 | } |
79a1e6b4 | 604 | |
a2b4994c | 605 | static void update_refs_for_switch(const struct checkout_opts *opts, |
782c2d65 DB |
606 | struct branch_info *old, |
607 | struct branch_info *new) | |
608 | { | |
f285a2d7 | 609 | struct strbuf msg = STRBUF_INIT; |
3bed291a | 610 | const char *old_desc, *reflog_msg; |
782c2d65 | 611 | if (opts->new_branch) { |
3631bf77 EM |
612 | if (opts->new_orphan_branch) { |
613 | if (opts->new_branch_log && !log_all_ref_updates) { | |
1a83c240 | 614 | int ret; |
abd0cd3a | 615 | char *refname; |
a4c653df | 616 | struct strbuf err = STRBUF_INIT; |
3631bf77 | 617 | |
abd0cd3a DT |
618 | refname = mkpathdup("refs/heads/%s", opts->new_orphan_branch); |
619 | ret = safe_create_reflog(refname, 1, &err); | |
620 | free(refname); | |
1a83c240 | 621 | if (ret) { |
a4c653df DT |
622 | fprintf(stderr, _("Can not do reflog for '%s': %s\n"), |
623 | opts->new_orphan_branch, err.buf); | |
624 | strbuf_release(&err); | |
3631bf77 EM |
625 | return; |
626 | } | |
abd0cd3a | 627 | strbuf_release(&err); |
3631bf77 EM |
628 | } |
629 | } | |
630 | else | |
02ac9837 TRC |
631 | create_branch(old->name, opts->new_branch, new->name, |
632 | opts->new_branch_force ? 1 : 0, | |
39bd6f72 JN |
633 | opts->new_branch_log, |
634 | opts->new_branch_force ? 1 : 0, | |
f9a482e6 | 635 | opts->quiet, |
39bd6f72 | 636 | opts->track); |
782c2d65 DB |
637 | new->name = opts->new_branch; |
638 | setup_branch_path(new); | |
639 | } | |
640 | ||
782c2d65 | 641 | old_desc = old->name; |
323e00fd | 642 | if (!old_desc && old->commit) |
782c2d65 | 643 | old_desc = sha1_to_hex(old->commit->object.sha1); |
3bed291a RR |
644 | |
645 | reflog_msg = getenv("GIT_REFLOG_ACTION"); | |
646 | if (!reflog_msg) | |
647 | strbuf_addf(&msg, "checkout: moving from %s to %s", | |
648 | old_desc ? old_desc : "(invalid)", new->name); | |
649 | else | |
650 | strbuf_insert(&msg, 0, reflog_msg, strlen(reflog_msg)); | |
782c2d65 | 651 | |
f8bd36a4 JN |
652 | if (!strcmp(new->name, "HEAD") && !new->path && !opts->force_detach) { |
653 | /* Nothing to do. */ | |
654 | } else if (opts->force_detach || !new->path) { /* No longer on any branch. */ | |
655 | update_ref(msg.buf, "HEAD", new->commit->object.sha1, NULL, | |
f4124112 | 656 | REF_NODEREF, UPDATE_REFS_DIE_ON_ERR); |
f8bd36a4 JN |
657 | if (!opts->quiet) { |
658 | if (old->path && advice_detached_head) | |
2857093b | 659 | detach_advice(new->name); |
6c80cd29 | 660 | describe_detached_head(_("HEAD is now at"), new->commit); |
f8bd36a4 JN |
661 | } |
662 | } else if (new->path) { /* Switch branches. */ | |
782c2d65 DB |
663 | create_symref("HEAD", new->path, msg.buf); |
664 | if (!opts->quiet) { | |
08eaa4be | 665 | if (old->path && !strcmp(new->path, old->path)) { |
39bd6f72 JN |
666 | if (opts->new_branch_force) |
667 | fprintf(stderr, _("Reset branch '%s'\n"), | |
668 | new->name); | |
669 | else | |
670 | fprintf(stderr, _("Already on '%s'\n"), | |
671 | new->name); | |
08eaa4be ÆAB |
672 | } else if (opts->new_branch) { |
673 | if (opts->branch_exists) | |
674 | fprintf(stderr, _("Switched to and reset branch '%s'\n"), new->name); | |
675 | else | |
676 | fprintf(stderr, _("Switched to a new branch '%s'\n"), new->name); | |
677 | } else { | |
e8a8a4d7 | 678 | fprintf(stderr, _("Switched to branch '%s'\n"), |
09a0ec58 | 679 | new->name); |
08eaa4be | 680 | } |
782c2d65 | 681 | } |
3631bf77 | 682 | if (old->path && old->name) { |
482b8f32 | 683 | if (!ref_exists(old->path) && reflog_exists(old->path)) |
4da58835 | 684 | delete_reflog(old->path); |
3631bf77 | 685 | } |
782c2d65 DB |
686 | } |
687 | remove_branch_state(); | |
688 | strbuf_release(&msg); | |
32669671 JH |
689 | if (!opts->quiet && |
690 | (new->path || (!opts->force_detach && !strcmp(new->name, "HEAD")))) | |
6d21bf96 | 691 | report_tracking(new); |
782c2d65 DB |
692 | } |
693 | ||
468224e5 | 694 | static int add_pending_uninteresting_ref(const char *refname, |
fcb615f5 | 695 | const struct object_id *oid, |
468224e5 | 696 | int flags, void *cb_data) |
8e2dc6ac | 697 | { |
fcb615f5 | 698 | add_pending_sha1(cb_data, refname, oid->hash, UNINTERESTING); |
5c08dc48 JK |
699 | return 0; |
700 | } | |
8e2dc6ac JH |
701 | |
702 | static void describe_one_orphan(struct strbuf *sb, struct commit *commit) | |
703 | { | |
0be240cc JK |
704 | strbuf_addstr(sb, " "); |
705 | strbuf_addstr(sb, | |
706 | find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV)); | |
707 | strbuf_addch(sb, ' '); | |
3c621839 JK |
708 | if (!parse_commit(commit)) |
709 | pp_commit_easy(CMIT_FMT_ONELINE, commit, sb); | |
8e2dc6ac JH |
710 | strbuf_addch(sb, '\n'); |
711 | } | |
712 | ||
713 | #define ORPHAN_CUTOFF 4 | |
714 | static void suggest_reattach(struct commit *commit, struct rev_info *revs) | |
715 | { | |
716 | struct commit *c, *last = NULL; | |
717 | struct strbuf sb = STRBUF_INIT; | |
718 | int lost = 0; | |
719 | while ((c = get_revision(revs)) != NULL) { | |
720 | if (lost < ORPHAN_CUTOFF) | |
721 | describe_one_orphan(&sb, c); | |
722 | last = c; | |
723 | lost++; | |
724 | } | |
725 | if (ORPHAN_CUTOFF < lost) { | |
726 | int more = lost - ORPHAN_CUTOFF; | |
727 | if (more == 1) | |
728 | describe_one_orphan(&sb, last); | |
729 | else | |
f06f08b7 | 730 | strbuf_addf(&sb, _(" ... and %d more.\n"), more); |
8e2dc6ac JH |
731 | } |
732 | ||
733 | fprintf(stderr, | |
f06f08b7 ÆAB |
734 | Q_( |
735 | /* The singular version */ | |
736 | "Warning: you are leaving %d commit behind, " | |
737 | "not connected to\n" | |
738 | "any of your branches:\n\n" | |
0faf2474 | 739 | "%s\n", |
f06f08b7 ÆAB |
740 | /* The plural version */ |
741 | "Warning: you are leaving %d commits behind, " | |
8e2dc6ac JH |
742 | "not connected to\n" |
743 | "any of your branches:\n\n" | |
f807b3dc | 744 | "%s\n", |
f06f08b7 ÆAB |
745 | /* Give ngettext() the count */ |
746 | lost), | |
747 | lost, | |
f807b3dc | 748 | sb.buf); |
8e2dc6ac | 749 | strbuf_release(&sb); |
f807b3dc JH |
750 | |
751 | if (advice_detached_head) | |
752 | fprintf(stderr, | |
fc792ca8 TS |
753 | Q_( |
754 | /* The singular version */ | |
755 | "If you want to keep it by creating a new branch, " | |
756 | "this may be a good time\nto do so with:\n\n" | |
757 | " git branch <new-branch-name> %s\n\n", | |
758 | /* The plural version */ | |
f807b3dc JH |
759 | "If you want to keep them by creating a new branch, " |
760 | "this may be a good time\nto do so with:\n\n" | |
fc792ca8 TS |
761 | " git branch <new-branch-name> %s\n\n", |
762 | /* Give ngettext() the count */ | |
763 | lost), | |
d6e14660 | 764 | find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV)); |
8e2dc6ac JH |
765 | } |
766 | ||
767 | /* | |
768 | * We are about to leave commit that was at the tip of a detached | |
769 | * HEAD. If it is not reachable from any ref, this is the last chance | |
770 | * for the user to do so without resorting to reflog. | |
771 | */ | |
5d886395 | 772 | static void orphaned_commit_warning(struct commit *old, struct commit *new) |
8e2dc6ac | 773 | { |
8e2dc6ac | 774 | struct rev_info revs; |
5d886395 | 775 | struct object *object = &old->object; |
10621419 | 776 | struct object_array refs; |
8e2dc6ac JH |
777 | |
778 | init_revisions(&revs, NULL); | |
468224e5 RS |
779 | setup_revisions(0, NULL, &revs, NULL); |
780 | ||
781 | object->flags &= ~UNINTERESTING; | |
782 | add_pending_object(&revs, object, sha1_to_hex(object->sha1)); | |
783 | ||
fcb615f5 | 784 | for_each_ref(add_pending_uninteresting_ref, &revs); |
5d886395 | 785 | add_pending_sha1(&revs, "HEAD", new->object.sha1, UNINTERESTING); |
468224e5 | 786 | |
10621419 RS |
787 | refs = revs.pending; |
788 | revs.leak_pending = 1; | |
789 | ||
8e2dc6ac | 790 | if (prepare_revision_walk(&revs)) |
6c80cd29 | 791 | die(_("internal error in revision walk")); |
5d886395 JS |
792 | if (!(old->object.flags & UNINTERESTING)) |
793 | suggest_reattach(old, &revs); | |
8e2dc6ac | 794 | else |
5d886395 | 795 | describe_detached_head(_("Previous HEAD position was"), old); |
5c08dc48 | 796 | |
86a0a408 | 797 | clear_commit_marks_for_object_array(&refs, ALL_REV_FLAGS); |
10621419 | 798 | free(refs.objects); |
8e2dc6ac JH |
799 | } |
800 | ||
e51e3057 NTND |
801 | static int switch_branches(const struct checkout_opts *opts, |
802 | struct branch_info *new) | |
782c2d65 DB |
803 | { |
804 | int ret = 0; | |
805 | struct branch_info old; | |
96ec7b1e | 806 | void *path_to_free; |
782c2d65 | 807 | unsigned char rev[20]; |
a2b4994c | 808 | int flag, writeout_error = 0; |
782c2d65 | 809 | memset(&old, 0, sizeof(old)); |
7695d118 | 810 | old.path = path_to_free = resolve_refdup("HEAD", 0, rev, &flag); |
782c2d65 | 811 | old.commit = lookup_commit_reference_gently(rev, 1); |
96ec7b1e | 812 | if (!(flag & REF_ISSYMREF)) |
782c2d65 DB |
813 | old.path = NULL; |
814 | ||
95b567c7 JK |
815 | if (old.path) |
816 | skip_prefix(old.path, "refs/heads/", &old.name); | |
782c2d65 DB |
817 | |
818 | if (!new->name) { | |
819 | new->name = "HEAD"; | |
820 | new->commit = old.commit; | |
821 | if (!new->commit) | |
e8a8a4d7 | 822 | die(_("You are on a branch yet to be born")); |
683ff884 | 823 | parse_commit_or_die(new->commit); |
782c2d65 DB |
824 | } |
825 | ||
a2b4994c | 826 | ret = merge_working_tree(opts, &old, new, &writeout_error); |
96ec7b1e NTND |
827 | if (ret) { |
828 | free(path_to_free); | |
782c2d65 | 829 | return ret; |
96ec7b1e | 830 | } |
782c2d65 | 831 | |
272be14a | 832 | if (!opts->quiet && !old.path && old.commit && new->commit != old.commit) |
5d886395 | 833 | orphaned_commit_warning(old.commit, new->commit); |
77ebd56d | 834 | |
782c2d65 DB |
835 | update_refs_for_switch(opts, &old, new); |
836 | ||
291d823e | 837 | ret = post_checkout_hook(old.commit, new->commit, 1); |
96ec7b1e | 838 | free(path_to_free); |
a2b4994c | 839 | return ret || writeout_error; |
782c2d65 DB |
840 | } |
841 | ||
0cf8581e JH |
842 | static int git_checkout_config(const char *var, const char *value, void *cb) |
843 | { | |
175f6e59 JS |
844 | if (!strcmp(var, "diff.ignoresubmodules")) { |
845 | struct checkout_opts *opts = cb; | |
846 | handle_ignore_submodules_arg(&opts->diff_options, value); | |
847 | return 0; | |
848 | } | |
23b4c7bc | 849 | |
59556548 | 850 | if (starts_with(var, "submodule.")) |
23b4c7bc JL |
851 | return parse_submodule_config_option(var, value); |
852 | ||
175f6e59 | 853 | return git_xmerge_config(var, value, NULL); |
0cf8581e JH |
854 | } |
855 | ||
70c9ac2f | 856 | struct tracking_name_data { |
fa83a33b JH |
857 | /* const */ char *src_ref; |
858 | char *dst_ref; | |
859 | unsigned char *dst_sha1; | |
70c9ac2f JH |
860 | int unique; |
861 | }; | |
862 | ||
fa83a33b | 863 | static int check_tracking_name(struct remote *remote, void *cb_data) |
70c9ac2f JH |
864 | { |
865 | struct tracking_name_data *cb = cb_data; | |
fa83a33b JH |
866 | struct refspec query; |
867 | memset(&query, 0, sizeof(struct refspec)); | |
868 | query.src = cb->src_ref; | |
869 | if (remote_find_tracking(remote, &query) || | |
2c484202 BC |
870 | get_sha1(query.dst, cb->dst_sha1)) { |
871 | free(query.dst); | |
70c9ac2f | 872 | return 0; |
2c484202 | 873 | } |
fa83a33b | 874 | if (cb->dst_ref) { |
2c484202 | 875 | free(query.dst); |
70c9ac2f JH |
876 | cb->unique = 0; |
877 | return 0; | |
878 | } | |
2c484202 | 879 | cb->dst_ref = query.dst; |
70c9ac2f JH |
880 | return 0; |
881 | } | |
882 | ||
fa83a33b | 883 | static const char *unique_tracking_name(const char *name, unsigned char *sha1) |
70c9ac2f | 884 | { |
fa83a33b JH |
885 | struct tracking_name_data cb_data = { NULL, NULL, NULL, 1 }; |
886 | char src_ref[PATH_MAX]; | |
887 | snprintf(src_ref, PATH_MAX, "refs/heads/%s", name); | |
888 | cb_data.src_ref = src_ref; | |
889 | cb_data.dst_sha1 = sha1; | |
890 | for_each_remote(check_tracking_name, &cb_data); | |
70c9ac2f | 891 | if (cb_data.unique) |
fa83a33b JH |
892 | return cb_data.dst_ref; |
893 | free(cb_data.dst_ref); | |
70c9ac2f JH |
894 | return NULL; |
895 | } | |
4f353658 | 896 | |
09ebad6f JN |
897 | static int parse_branchname_arg(int argc, const char **argv, |
898 | int dwim_new_local_branch_ok, | |
899 | struct branch_info *new, | |
10f102be NTND |
900 | struct checkout_opts *opts, |
901 | unsigned char rev[20]) | |
09ebad6f | 902 | { |
10f102be NTND |
903 | struct tree **source_tree = &opts->source_tree; |
904 | const char **new_branch = &opts->new_branch; | |
09ebad6f JN |
905 | int argcount = 0; |
906 | unsigned char branch_rev[20]; | |
907 | const char *arg; | |
bca39695 MM |
908 | int dash_dash_pos; |
909 | int has_dash_dash = 0; | |
910 | int i; | |
09ebad6f JN |
911 | |
912 | /* | |
913 | * case 1: git checkout <ref> -- [<paths>] | |
914 | * | |
915 | * <ref> must be a valid tree, everything after the '--' must be | |
916 | * a path. | |
917 | * | |
918 | * case 2: git checkout -- [<paths>] | |
919 | * | |
920 | * everything after the '--' must be paths. | |
921 | * | |
a047fafc | 922 | * case 3: git checkout <something> [--] |
09ebad6f | 923 | * |
a047fafc MM |
924 | * (a) If <something> is a commit, that is to |
925 | * switch to the branch or detach HEAD at it. As a special case, | |
926 | * if <something> is A...B (missing A or B means HEAD but you can | |
927 | * omit at most one side), and if there is a unique merge base | |
928 | * between A and B, A...B names that merge base. | |
09ebad6f | 929 | * |
a047fafc | 930 | * (b) If <something> is _not_ a commit, either "--" is present |
01689909 | 931 | * or <something> is not a path, no -t or -b was given, and |
a047fafc MM |
932 | * and there is a tracking branch whose name is <something> |
933 | * in one and only one remote, then this is a short-hand to | |
934 | * fork local <something> from that remote-tracking branch. | |
09ebad6f | 935 | * |
a047fafc MM |
936 | * (c) Otherwise, if "--" is present, treat it like case (1). |
937 | * | |
938 | * (d) Otherwise : | |
939 | * - if it's a reference, treat it like case (1) | |
940 | * - else if it's a path, treat it like case (2) | |
941 | * - else: fail. | |
942 | * | |
943 | * case 4: git checkout <something> <paths> | |
944 | * | |
945 | * The first argument must not be ambiguous. | |
09ebad6f JN |
946 | * - If it's *only* a reference, treat it like case (1). |
947 | * - If it's only a path, treat it like case (2). | |
948 | * - else: fail. | |
949 | * | |
950 | */ | |
951 | if (!argc) | |
952 | return 0; | |
953 | ||
09ebad6f | 954 | arg = argv[0]; |
bca39695 MM |
955 | dash_dash_pos = -1; |
956 | for (i = 0; i < argc; i++) { | |
957 | if (!strcmp(argv[i], "--")) { | |
958 | dash_dash_pos = i; | |
959 | break; | |
960 | } | |
961 | } | |
962 | if (dash_dash_pos == 0) | |
963 | return 1; /* case (2) */ | |
964 | else if (dash_dash_pos == 1) | |
965 | has_dash_dash = 1; /* case (3) or (1) */ | |
966 | else if (dash_dash_pos >= 2) | |
967 | die(_("only one reference expected, %d given."), dash_dash_pos); | |
09ebad6f JN |
968 | |
969 | if (!strcmp(arg, "-")) | |
970 | arg = "@{-1}"; | |
971 | ||
972 | if (get_sha1_mb(arg, rev)) { | |
a047fafc MM |
973 | /* |
974 | * Either case (3) or (4), with <something> not being | |
975 | * a commit, or an attempt to use case (1) with an | |
976 | * invalid ref. | |
977 | * | |
978 | * It's likely an error, but we need to find out if | |
979 | * we should auto-create the branch, case (3).(b). | |
980 | */ | |
981 | int recover_with_dwim = dwim_new_local_branch_ok; | |
982 | ||
983 | if (check_filename(NULL, arg) && !has_dash_dash) | |
984 | recover_with_dwim = 0; | |
985 | /* | |
986 | * Accept "git checkout foo" and "git checkout foo --" | |
987 | * as candidates for dwim. | |
988 | */ | |
989 | if (!(argc == 1 && !has_dash_dash) && | |
990 | !(argc == 2 && has_dash_dash)) | |
991 | recover_with_dwim = 0; | |
992 | ||
993 | if (recover_with_dwim) { | |
fa83a33b | 994 | const char *remote = unique_tracking_name(arg, rev); |
a047fafc MM |
995 | if (remote) { |
996 | *new_branch = arg; | |
997 | arg = remote; | |
998 | /* DWIMmed to create local branch, case (3).(b) */ | |
999 | } else { | |
1000 | recover_with_dwim = 0; | |
1001 | } | |
1002 | } | |
1003 | ||
1004 | if (!recover_with_dwim) { | |
1005 | if (has_dash_dash) | |
1006 | die(_("invalid reference: %s"), arg); | |
09ebad6f JN |
1007 | return argcount; |
1008 | } | |
1009 | } | |
1010 | ||
1011 | /* we can't end up being in (2) anymore, eat the argument */ | |
1012 | argcount++; | |
1013 | argv++; | |
1014 | argc--; | |
1015 | ||
1016 | new->name = arg; | |
1017 | setup_branch_path(new); | |
1018 | ||
8d9c5010 | 1019 | if (!check_refname_format(new->path, 0) && |
c6893323 | 1020 | !read_ref(new->path, branch_rev)) |
09ebad6f JN |
1021 | hashcpy(rev, branch_rev); |
1022 | else | |
1023 | new->path = NULL; /* not an existing branch */ | |
1024 | ||
1025 | new->commit = lookup_commit_reference_gently(rev, 1); | |
1026 | if (!new->commit) { | |
1027 | /* not a commit */ | |
1028 | *source_tree = parse_tree_indirect(rev); | |
1029 | } else { | |
683ff884 | 1030 | parse_commit_or_die(new->commit); |
09ebad6f JN |
1031 | *source_tree = new->commit->tree; |
1032 | } | |
1033 | ||
1034 | if (!*source_tree) /* case (1): want a tree */ | |
6c80cd29 | 1035 | die(_("reference is not a tree: %s"), arg); |
a047fafc | 1036 | if (!has_dash_dash) {/* case (3).(d) -> (1) */ |
09ebad6f JN |
1037 | /* |
1038 | * Do not complain the most common case | |
1039 | * git checkout branch | |
1040 | * even if there happen to be a file called 'branch'; | |
1041 | * it would be extremely annoying. | |
1042 | */ | |
1043 | if (argc) | |
1044 | verify_non_filename(NULL, arg); | |
1045 | } else { | |
1046 | argcount++; | |
1047 | argv++; | |
1048 | argc--; | |
1049 | } | |
1050 | ||
1051 | return argcount; | |
1052 | } | |
1053 | ||
a2b4994c | 1054 | static int switch_unborn_to_new_branch(const struct checkout_opts *opts) |
abe19980 JH |
1055 | { |
1056 | int status; | |
1057 | struct strbuf branch_ref = STRBUF_INIT; | |
1058 | ||
8ced1aa0 CW |
1059 | if (!opts->new_branch) |
1060 | die(_("You are on a branch yet to be born")); | |
abe19980 JH |
1061 | strbuf_addf(&branch_ref, "refs/heads/%s", opts->new_branch); |
1062 | status = create_symref("HEAD", branch_ref.buf, "checkout -b"); | |
1063 | strbuf_release(&branch_ref); | |
afa8c07a JK |
1064 | if (!opts->quiet) |
1065 | fprintf(stderr, _("Switched to a new branch '%s'\n"), | |
1066 | opts->new_branch); | |
abe19980 JH |
1067 | return status; |
1068 | } | |
1069 | ||
b6312c27 NTND |
1070 | static int checkout_branch(struct checkout_opts *opts, |
1071 | struct branch_info *new) | |
1072 | { | |
817b345a | 1073 | if (opts->pathspec.nr) |
b6312c27 NTND |
1074 | die(_("paths cannot be used with switching branches")); |
1075 | ||
1076 | if (opts->patch_mode) | |
1077 | die(_("'%s' cannot be used with switching branches"), | |
1078 | "--patch"); | |
1079 | ||
1080 | if (opts->writeout_stage) | |
1081 | die(_("'%s' cannot be used with switching branches"), | |
1082 | "--ours/--theirs"); | |
1083 | ||
1084 | if (opts->force && opts->merge) | |
1085 | die(_("'%s' cannot be used with '%s'"), "-f", "-m"); | |
1086 | ||
1087 | if (opts->force_detach && opts->new_branch) | |
1088 | die(_("'%s' cannot be used with '%s'"), | |
1089 | "--detach", "-b/-B/--orphan"); | |
1090 | ||
1091 | if (opts->new_orphan_branch) { | |
1092 | if (opts->track != BRANCH_TRACK_UNSPECIFIED) | |
1093 | die(_("'%s' cannot be used with '%s'"), "--orphan", "-t"); | |
1094 | } else if (opts->force_detach) { | |
1095 | if (opts->track != BRANCH_TRACK_UNSPECIFIED) | |
1096 | die(_("'%s' cannot be used with '%s'"), "--detach", "-t"); | |
1097 | } else if (opts->track == BRANCH_TRACK_UNSPECIFIED) | |
1098 | opts->track = git_branch_track; | |
1099 | ||
1100 | if (new->name && !new->commit) | |
1101 | die(_("Cannot switch branch to a non-commit '%s'"), | |
1102 | new->name); | |
1103 | ||
c265c533 ES |
1104 | if (new->path && !opts->force_detach && !opts->new_branch && |
1105 | !opts->ignore_other_worktrees) { | |
e1c1ab9d NTND |
1106 | unsigned char sha1[20]; |
1107 | int flag; | |
1108 | char *head_ref = resolve_refdup("HEAD", 0, sha1, &flag); | |
1109 | if (head_ref && | |
c265c533 | 1110 | (!(flag & REF_ISSYMREF) || strcmp(head_ref, new->path))) |
4341460d | 1111 | die_if_checked_out(new->path); |
e1c1ab9d NTND |
1112 | free(head_ref); |
1113 | } | |
1114 | ||
b6312c27 NTND |
1115 | if (!new->commit && opts->new_branch) { |
1116 | unsigned char rev[20]; | |
1117 | int flag; | |
1118 | ||
7695d118 | 1119 | if (!read_ref_full("HEAD", 0, rev, &flag) && |
b6312c27 NTND |
1120 | (flag & REF_ISSYMREF) && is_null_sha1(rev)) |
1121 | return switch_unborn_to_new_branch(opts); | |
1122 | } | |
1123 | return switch_branches(opts, new); | |
1124 | } | |
1125 | ||
782c2d65 DB |
1126 | int cmd_checkout(int argc, const char **argv, const char *prefix) |
1127 | { | |
1128 | struct checkout_opts opts; | |
782c2d65 | 1129 | struct branch_info new; |
eac5a401 | 1130 | char *conflict_style = NULL; |
46148dd7 | 1131 | int dwim_new_local_branch = 1; |
782c2d65 | 1132 | struct option options[] = { |
e05a1093 NTND |
1133 | OPT__QUIET(&opts.quiet, N_("suppress progress reporting")), |
1134 | OPT_STRING('b', NULL, &opts.new_branch, N_("branch"), | |
1135 | N_("create and checkout a new branch")), | |
1136 | OPT_STRING('B', NULL, &opts.new_branch_force, N_("branch"), | |
1137 | N_("create/reset and checkout a branch")), | |
d5d09d47 SB |
1138 | OPT_BOOL('l', NULL, &opts.new_branch_log, N_("create reflog for new branch")), |
1139 | OPT_BOOL(0, "detach", &opts.force_detach, N_("detach the HEAD at named commit")), | |
e05a1093 | 1140 | OPT_SET_INT('t', "track", &opts.track, N_("set upstream info for new branch"), |
9ed36cfa | 1141 | BRANCH_TRACK_EXPLICIT), |
e703d711 | 1142 | OPT_STRING(0, "orphan", &opts.new_orphan_branch, N_("new-branch"), N_("new unparented branch")), |
e05a1093 | 1143 | OPT_SET_INT('2', "ours", &opts.writeout_stage, N_("checkout our version for unmerged files"), |
38901a48 | 1144 | 2), |
e05a1093 | 1145 | OPT_SET_INT('3', "theirs", &opts.writeout_stage, N_("checkout their version for unmerged files"), |
38901a48 | 1146 | 3), |
e05a1093 | 1147 | OPT__FORCE(&opts.force, N_("force checkout (throw away local modifications)")), |
d5d09d47 SB |
1148 | OPT_BOOL('m', "merge", &opts.merge, N_("perform a 3-way merge with the new branch")), |
1149 | OPT_BOOL(0, "overwrite-ignore", &opts.overwrite_ignore, N_("update ignored files (default)")), | |
e05a1093 NTND |
1150 | OPT_STRING(0, "conflict", &conflict_style, N_("style"), |
1151 | N_("conflict style (merge or diff3)")), | |
d5d09d47 | 1152 | OPT_BOOL('p', "patch", &opts.patch_mode, N_("select hunks interactively")), |
08d595dc NTND |
1153 | OPT_BOOL(0, "ignore-skip-worktree-bits", &opts.ignore_skipworktree, |
1154 | N_("do not limit pathspecs to sparse entries only")), | |
4741edd5 | 1155 | OPT_HIDDEN_BOOL(0, "guess", &dwim_new_local_branch, |
9c9b4f2f | 1156 | N_("second guess 'git checkout <no-such-branch>'")), |
1d0fa898 NTND |
1157 | OPT_BOOL(0, "ignore-other-worktrees", &opts.ignore_other_worktrees, |
1158 | N_("do not check if another worktree is holding the given ref")), | |
b249b552 | 1159 | OPT_END(), |
782c2d65 DB |
1160 | }; |
1161 | ||
1162 | memset(&opts, 0, sizeof(opts)); | |
1163 | memset(&new, 0, sizeof(new)); | |
c1d7036b | 1164 | opts.overwrite_ignore = 1; |
e51e3057 | 1165 | opts.prefix = prefix; |
782c2d65 | 1166 | |
23b4c7bc | 1167 | gitmodules_config(); |
175f6e59 | 1168 | git_config(git_checkout_config, &opts); |
782c2d65 | 1169 | |
9188ed89 | 1170 | opts.track = BRANCH_TRACK_UNSPECIFIED; |
782c2d65 | 1171 | |
37782920 | 1172 | argc = parse_options(argc, argv, prefix, options, checkout_usage, |
f5242ebf | 1173 | PARSE_OPT_KEEP_DASHDASH); |
859fdaba | 1174 | |
b6312c27 NTND |
1175 | if (conflict_style) { |
1176 | opts.merge = 1; /* implied */ | |
1177 | git_xmerge_config("merge.conflictstyle", conflict_style, NULL); | |
1178 | } | |
02ac9837 | 1179 | |
b6312c27 NTND |
1180 | if ((!!opts.new_branch + !!opts.new_branch_force + !!opts.new_orphan_branch) > 1) |
1181 | die(_("-b, -B and --orphan are mutually exclusive")); | |
02ac9837 | 1182 | |
b6312c27 NTND |
1183 | /* |
1184 | * From here on, new_branch will contain the branch to be checked out, | |
1185 | * and new_branch_force and new_orphan_branch will tell us which one of | |
1186 | * -b/-B/--orphan is being used. | |
1187 | */ | |
02ac9837 TRC |
1188 | if (opts.new_branch_force) |
1189 | opts.new_branch = opts.new_branch_force; | |
1190 | ||
b6312c27 NTND |
1191 | if (opts.new_orphan_branch) |
1192 | opts.new_branch = opts.new_orphan_branch; | |
32669671 | 1193 | |
b6312c27 NTND |
1194 | /* --track without -b/-B/--orphan should DWIM */ |
1195 | if (opts.track != BRANCH_TRACK_UNSPECIFIED && !opts.new_branch) { | |
9188ed89 AR |
1196 | const char *argv0 = argv[0]; |
1197 | if (!argc || !strcmp(argv0, "--")) | |
e8a8a4d7 | 1198 | die (_("--track needs a branch name")); |
e3f1da98 RS |
1199 | skip_prefix(argv0, "refs/", &argv0); |
1200 | skip_prefix(argv0, "remotes/", &argv0); | |
9188ed89 AR |
1201 | argv0 = strchr(argv0, '/'); |
1202 | if (!argv0 || !argv0[1]) | |
e8a8a4d7 | 1203 | die (_("Missing branch name; try -b")); |
9188ed89 | 1204 | opts.new_branch = argv0 + 1; |
bb0ceb62 JS |
1205 | } |
1206 | ||
859fdaba | 1207 | /* |
09ebad6f JN |
1208 | * Extract branch name from command line arguments, so |
1209 | * all that is left is pathspecs. | |
859fdaba | 1210 | * |
09ebad6f | 1211 | * Handle |
70c9ac2f | 1212 | * |
09ebad6f JN |
1213 | * 1) git checkout <tree> -- [<paths>] |
1214 | * 2) git checkout -- [<paths>] | |
1215 | * 3) git checkout <something> [<paths>] | |
859fdaba | 1216 | * |
09ebad6f JN |
1217 | * including "last branch" syntax and DWIM-ery for names of |
1218 | * remote branches, erroring out for invalid or ambiguous cases. | |
859fdaba | 1219 | */ |
782c2d65 | 1220 | if (argc) { |
e51e3057 | 1221 | unsigned char rev[20]; |
09ebad6f | 1222 | int dwim_ok = |
e51e3057 | 1223 | !opts.patch_mode && |
09ebad6f JN |
1224 | dwim_new_local_branch && |
1225 | opts.track == BRANCH_TRACK_UNSPECIFIED && | |
1226 | !opts.new_branch; | |
f8bd36a4 | 1227 | int n = parse_branchname_arg(argc, argv, dwim_ok, |
10f102be | 1228 | &new, &opts, rev); |
09ebad6f JN |
1229 | argv += n; |
1230 | argc -= n; | |
782c2d65 DB |
1231 | } |
1232 | ||
782c2d65 | 1233 | if (argc) { |
480ca644 NTND |
1234 | parse_pathspec(&opts.pathspec, 0, |
1235 | opts.patch_mode ? PATHSPEC_PREFIX_ORIGIN : 0, | |
1236 | prefix, argv); | |
301e42ed | 1237 | |
817b345a | 1238 | if (!opts.pathspec.nr) |
e8a8a4d7 | 1239 | die(_("invalid path specification")); |
301e42ed | 1240 | |
b6312c27 NTND |
1241 | /* |
1242 | * Try to give more helpful suggestion. | |
1243 | * new_branch && argc > 1 will be caught later. | |
1244 | */ | |
1245 | if (opts.new_branch && argc == 1) | |
1246 | die(_("Cannot update paths and switch to branch '%s' at the same time.\n" | |
1247 | "Did you intend to checkout '%s' which can not be resolved as commit?"), | |
1248 | opts.new_branch, argv[0]); | |
782c2d65 | 1249 | |
32669671 | 1250 | if (opts.force_detach) |
b6312c27 NTND |
1251 | die(_("git checkout: --detach does not take a path argument '%s'"), |
1252 | argv[0]); | |
32669671 | 1253 | |
0cf8581e | 1254 | if (1 < !!opts.writeout_stage + !!opts.force + !!opts.merge) |
b6312c27 NTND |
1255 | die(_("git checkout: --ours/--theirs, --force and --merge are incompatible when\n" |
1256 | "checking out of the index.")); | |
782c2d65 DB |
1257 | } |
1258 | ||
352eadc4 | 1259 | if (opts.new_branch) { |
f285a2d7 | 1260 | struct strbuf buf = STRBUF_INIT; |
55c4a673 | 1261 | |
b6312c27 NTND |
1262 | opts.branch_exists = |
1263 | validate_new_branchname(opts.new_branch, &buf, | |
1264 | !!opts.new_branch_force, | |
1265 | !!opts.new_branch_force); | |
55c4a673 | 1266 | |
352eadc4 DB |
1267 | strbuf_release(&buf); |
1268 | } | |
1269 | ||
817b345a | 1270 | if (opts.patch_mode || opts.pathspec.nr) |
b6312c27 NTND |
1271 | return checkout_paths(&opts, new.name); |
1272 | else | |
1273 | return checkout_branch(&opts, &new); | |
782c2d65 | 1274 | } |