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Commit | Line | Data |
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782c2d65 DB |
1 | #include "cache.h" |
2 | #include "builtin.h" | |
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" |
175f6e59 | 21 | #include "submodule.h" |
7bf0b017 | 22 | #include "argv-array.h" |
782c2d65 DB |
23 | |
24 | static const char * const checkout_usage[] = { | |
e05a1093 NTND |
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; |
db941099 JH |
39 | |
40 | const char *new_branch; | |
02ac9837 | 41 | const char *new_branch_force; |
9db5ebf4 | 42 | const char *new_orphan_branch; |
db941099 JH |
43 | int new_branch_log; |
44 | enum branch_track track; | |
175f6e59 | 45 | struct diff_options diff_options; |
e51e3057 NTND |
46 | |
47 | int branch_exists; | |
48 | const char *prefix; | |
817b345a | 49 | struct pathspec pathspec; |
e51e3057 | 50 | struct tree *source_tree; |
db941099 JH |
51 | }; |
52 | ||
782c2d65 DB |
53 | static int post_checkout_hook(struct commit *old, struct commit *new, |
54 | int changed) | |
55 | { | |
15048f8a BP |
56 | return run_hook_le(NULL, "post-checkout", |
57 | sha1_to_hex(old ? old->object.sha1 : null_sha1), | |
58 | sha1_to_hex(new ? new->object.sha1 : null_sha1), | |
59 | changed ? "1" : "0", NULL); | |
2292ce47 SB |
60 | /* "new" can be NULL when checking out from the index before |
61 | a commit exists. */ | |
ae98a008 | 62 | |
782c2d65 DB |
63 | } |
64 | ||
65 | static int update_some(const unsigned char *sha1, const char *base, int baselen, | |
671f0707 | 66 | const char *pathname, unsigned mode, int stage, void *context) |
782c2d65 DB |
67 | { |
68 | int len; | |
69 | struct cache_entry *ce; | |
70 | ||
782c2d65 DB |
71 | if (S_ISDIR(mode)) |
72 | return READ_TREE_RECURSIVE; | |
73 | ||
74 | len = baselen + strlen(pathname); | |
75 | ce = xcalloc(1, cache_entry_size(len)); | |
76 | hashcpy(ce->sha1, sha1); | |
77 | memcpy(ce->name, base, baselen); | |
78 | memcpy(ce->name + baselen, pathname, len - baselen); | |
b60e188c TG |
79 | ce->ce_flags = create_ce_flags(0) | CE_UPDATE; |
80 | ce->ce_namelen = len; | |
782c2d65 DB |
81 | ce->ce_mode = create_ce_mode(mode); |
82 | add_cache_entry(ce, ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE); | |
83 | return 0; | |
84 | } | |
85 | ||
18e4f405 | 86 | static int read_tree_some(struct tree *tree, const struct pathspec *pathspec) |
782c2d65 | 87 | { |
18e4f405 | 88 | read_tree_recursive(tree, "", 0, 0, pathspec, update_some, NULL); |
782c2d65 | 89 | |
782c2d65 DB |
90 | /* update the index with the given tree's info |
91 | * for all args, expanding wildcards, and exit | |
92 | * with any non-zero return code. | |
93 | */ | |
94 | return 0; | |
95 | } | |
96 | ||
9c5e6c80 | 97 | static int skip_same_name(const struct cache_entry *ce, int pos) |
8fdcf312 JH |
98 | { |
99 | while (++pos < active_nr && | |
100 | !strcmp(active_cache[pos]->name, ce->name)) | |
101 | ; /* skip */ | |
102 | return pos; | |
103 | } | |
104 | ||
9c5e6c80 | 105 | static int check_stage(int stage, const struct cache_entry *ce, int pos) |
38901a48 JH |
106 | { |
107 | while (pos < active_nr && | |
108 | !strcmp(active_cache[pos]->name, ce->name)) { | |
109 | if (ce_stage(active_cache[pos]) == stage) | |
110 | return 0; | |
111 | pos++; | |
112 | } | |
9f97ab08 ÆAB |
113 | if (stage == 2) |
114 | return error(_("path '%s' does not have our version"), ce->name); | |
115 | else | |
116 | return error(_("path '%s' does not have their version"), ce->name); | |
38901a48 JH |
117 | } |
118 | ||
9c5e6c80 | 119 | static int check_stages(unsigned stages, const struct cache_entry *ce, int pos) |
0cf8581e | 120 | { |
fbbccd0a JH |
121 | unsigned seen = 0; |
122 | const char *name = ce->name; | |
123 | ||
124 | while (pos < active_nr) { | |
125 | ce = active_cache[pos]; | |
126 | if (strcmp(name, ce->name)) | |
127 | break; | |
128 | seen |= (1 << ce_stage(ce)); | |
129 | pos++; | |
130 | } | |
131 | if ((stages & seen) != stages) | |
132 | return error(_("path '%s' does not have all necessary versions"), | |
133 | name); | |
0cf8581e JH |
134 | return 0; |
135 | } | |
136 | ||
38901a48 JH |
137 | static int checkout_stage(int stage, struct cache_entry *ce, int pos, |
138 | struct checkout *state) | |
139 | { | |
140 | while (pos < active_nr && | |
141 | !strcmp(active_cache[pos]->name, ce->name)) { | |
142 | if (ce_stage(active_cache[pos]) == stage) | |
143 | return checkout_entry(active_cache[pos], state, NULL); | |
144 | pos++; | |
145 | } | |
9f97ab08 ÆAB |
146 | if (stage == 2) |
147 | return error(_("path '%s' does not have our version"), ce->name); | |
148 | else | |
149 | return error(_("path '%s' does not have their version"), ce->name); | |
38901a48 | 150 | } |
8fdcf312 | 151 | |
0cf8581e JH |
152 | static int checkout_merged(int pos, struct checkout *state) |
153 | { | |
154 | struct cache_entry *ce = active_cache[pos]; | |
155 | const char *path = ce->name; | |
156 | mmfile_t ancestor, ours, theirs; | |
157 | int status; | |
158 | unsigned char sha1[20]; | |
159 | mmbuffer_t result_buf; | |
fbbccd0a | 160 | unsigned char threeway[3][20]; |
335c6e40 | 161 | unsigned mode = 0; |
0cf8581e | 162 | |
fbbccd0a JH |
163 | memset(threeway, 0, sizeof(threeway)); |
164 | while (pos < active_nr) { | |
165 | int stage; | |
166 | stage = ce_stage(ce); | |
167 | if (!stage || strcmp(path, ce->name)) | |
168 | break; | |
169 | hashcpy(threeway[stage - 1], ce->sha1); | |
170 | if (stage == 2) | |
171 | mode = create_ce_mode(ce->ce_mode); | |
172 | pos++; | |
173 | ce = active_cache[pos]; | |
174 | } | |
175 | if (is_null_sha1(threeway[1]) || is_null_sha1(threeway[2])) | |
176 | return error(_("path '%s' does not have necessary versions"), path); | |
0cf8581e | 177 | |
fbbccd0a JH |
178 | read_mmblob(&ancestor, threeway[0]); |
179 | read_mmblob(&ours, threeway[1]); | |
180 | read_mmblob(&theirs, threeway[2]); | |
0cf8581e | 181 | |
18b037a5 JN |
182 | /* |
183 | * NEEDSWORK: re-create conflicts from merges with | |
184 | * merge.renormalize set, too | |
185 | */ | |
f0531a29 | 186 | status = ll_merge(&result_buf, path, &ancestor, "base", |
712516bc | 187 | &ours, "ours", &theirs, "theirs", NULL); |
0cf8581e JH |
188 | free(ancestor.ptr); |
189 | free(ours.ptr); | |
190 | free(theirs.ptr); | |
191 | if (status < 0 || !result_buf.ptr) { | |
192 | free(result_buf.ptr); | |
e8a8a4d7 | 193 | return error(_("path '%s': cannot merge"), path); |
0cf8581e JH |
194 | } |
195 | ||
196 | /* | |
197 | * NEEDSWORK: | |
198 | * There is absolutely no reason to write this as a blob object | |
3ea3c215 | 199 | * and create a phony cache entry just to leak. This hack is |
0cf8581e JH |
200 | * primarily to get to the write_entry() machinery that massages |
201 | * the contents to work-tree format and writes out which only | |
202 | * allows it for a cache entry. The code in write_entry() needs | |
203 | * to be refactored to allow us to feed a <buffer, size, mode> | |
204 | * instead of a cache entry. Such a refactoring would help | |
205 | * merge_recursive as well (it also writes the merge result to the | |
206 | * object database even when it may contain conflicts). | |
207 | */ | |
208 | if (write_sha1_file(result_buf.ptr, result_buf.size, | |
209 | blob_type, sha1)) | |
e8a8a4d7 | 210 | die(_("Unable to add merge result for '%s'"), path); |
fbbccd0a | 211 | ce = make_cache_entry(mode, sha1, path, 2, 0); |
048f2762 | 212 | if (!ce) |
e8a8a4d7 | 213 | die(_("make_cache_entry failed for path '%s'"), path); |
0cf8581e JH |
214 | status = checkout_entry(ce, state, NULL); |
215 | return status; | |
216 | } | |
8fdcf312 | 217 | |
b6312c27 NTND |
218 | static int checkout_paths(const struct checkout_opts *opts, |
219 | const char *revision) | |
782c2d65 DB |
220 | { |
221 | int pos; | |
222 | struct checkout state; | |
223 | static char *ps_matched; | |
224 | unsigned char rev[20]; | |
225 | int flag; | |
226 | struct commit *head; | |
d2b3691b | 227 | int errs = 0; |
b6312c27 NTND |
228 | struct lock_file *lock_file; |
229 | ||
230 | if (opts->track != BRANCH_TRACK_UNSPECIFIED) | |
231 | die(_("'%s' cannot be used with updating paths"), "--track"); | |
232 | ||
233 | if (opts->new_branch_log) | |
234 | die(_("'%s' cannot be used with updating paths"), "-l"); | |
235 | ||
236 | if (opts->force && opts->patch_mode) | |
237 | die(_("'%s' cannot be used with updating paths"), "-f"); | |
238 | ||
239 | if (opts->force_detach) | |
240 | die(_("'%s' cannot be used with updating paths"), "--detach"); | |
241 | ||
242 | if (opts->merge && opts->patch_mode) | |
243 | die(_("'%s' cannot be used with %s"), "--merge", "--patch"); | |
244 | ||
245 | if (opts->force && opts->merge) | |
246 | die(_("'%s' cannot be used with %s"), "-f", "-m"); | |
247 | ||
248 | if (opts->new_branch) | |
249 | die(_("Cannot update paths and switch to branch '%s' at the same time."), | |
250 | opts->new_branch); | |
251 | ||
252 | if (opts->patch_mode) | |
253 | return run_add_interactive(revision, "--patch=checkout", | |
480ca644 | 254 | &opts->pathspec); |
b6312c27 NTND |
255 | |
256 | lock_file = xcalloc(1, sizeof(struct lock_file)); | |
75336878 | 257 | |
03b86647 | 258 | hold_locked_index(lock_file, 1); |
5ab2a2da | 259 | if (read_cache_preload(&opts->pathspec) < 0) |
e8a8a4d7 | 260 | return error(_("corrupt index file")); |
75336878 | 261 | |
e51e3057 | 262 | if (opts->source_tree) |
18e4f405 | 263 | read_tree_some(opts->source_tree, &opts->pathspec); |
75336878 | 264 | |
817b345a | 265 | ps_matched = xcalloc(1, opts->pathspec.nr); |
782c2d65 | 266 | |
e721c154 NTND |
267 | /* |
268 | * Make sure all pathspecs participated in locating the paths | |
269 | * to be checked out. | |
270 | */ | |
782c2d65 DB |
271 | for (pos = 0; pos < active_nr; pos++) { |
272 | struct cache_entry *ce = active_cache[pos]; | |
e721c154 | 273 | ce->ce_flags &= ~CE_MATCHED; |
08d595dc NTND |
274 | if (!opts->ignore_skipworktree && ce_skip_worktree(ce)) |
275 | continue; | |
e51e3057 | 276 | if (opts->source_tree && !(ce->ce_flags & CE_UPDATE)) |
e721c154 NTND |
277 | /* |
278 | * "git checkout tree-ish -- path", but this entry | |
279 | * is in the original index; it will not be checked | |
280 | * out to the working tree and it does not matter | |
281 | * if pathspec matched this entry. We will not do | |
282 | * anything to this entry at all. | |
283 | */ | |
0a1283bc | 284 | continue; |
e721c154 NTND |
285 | /* |
286 | * Either this entry came from the tree-ish we are | |
287 | * checking the paths out of, or we are checking out | |
288 | * of the index. | |
289 | * | |
290 | * If it comes from the tree-ish, we already know it | |
291 | * matches the pathspec and could just stamp | |
292 | * CE_MATCHED to it from update_some(). But we still | |
293 | * need ps_matched and read_tree_recursive (and | |
294 | * eventually tree_entry_interesting) cannot fill | |
295 | * ps_matched yet. Once it can, we can avoid calling | |
296 | * match_pathspec() for _all_ entries when | |
297 | * opts->source_tree != NULL. | |
298 | */ | |
429bb40a | 299 | if (ce_path_match(ce, &opts->pathspec, ps_matched)) |
e721c154 | 300 | ce->ce_flags |= CE_MATCHED; |
782c2d65 DB |
301 | } |
302 | ||
17ddc66e | 303 | if (report_path_error(ps_matched, &opts->pathspec, opts->prefix)) { |
e721c154 | 304 | free(ps_matched); |
782c2d65 | 305 | return 1; |
e721c154 NTND |
306 | } |
307 | free(ps_matched); | |
782c2d65 | 308 | |
4421a823 JH |
309 | /* "checkout -m path" to recreate conflicted state */ |
310 | if (opts->merge) | |
e721c154 | 311 | unmerge_marked_index(&the_index); |
4421a823 | 312 | |
8fdcf312 JH |
313 | /* Any unmerged paths? */ |
314 | for (pos = 0; pos < active_nr; pos++) { | |
9c5e6c80 | 315 | const struct cache_entry *ce = active_cache[pos]; |
e721c154 | 316 | if (ce->ce_flags & CE_MATCHED) { |
8fdcf312 JH |
317 | if (!ce_stage(ce)) |
318 | continue; | |
db941099 | 319 | if (opts->force) { |
e8a8a4d7 | 320 | warning(_("path '%s' is unmerged"), ce->name); |
f9022075 SB |
321 | } else if (opts->writeout_stage) { |
322 | errs |= check_stage(opts->writeout_stage, ce, pos); | |
0cf8581e | 323 | } else if (opts->merge) { |
fbbccd0a | 324 | errs |= check_stages((1<<2) | (1<<3), ce, pos); |
db941099 JH |
325 | } else { |
326 | errs = 1; | |
e8a8a4d7 | 327 | error(_("path '%s' is unmerged"), ce->name); |
db941099 | 328 | } |
8fdcf312 JH |
329 | pos = skip_same_name(ce, pos) - 1; |
330 | } | |
331 | } | |
332 | if (errs) | |
333 | return 1; | |
334 | ||
d2b3691b | 335 | /* Now we are committed to check them out */ |
782c2d65 DB |
336 | memset(&state, 0, sizeof(state)); |
337 | state.force = 1; | |
338 | state.refresh_cache = 1; | |
d4a2024a | 339 | state.istate = &the_index; |
782c2d65 DB |
340 | for (pos = 0; pos < active_nr; pos++) { |
341 | struct cache_entry *ce = active_cache[pos]; | |
e721c154 | 342 | if (ce->ce_flags & CE_MATCHED) { |
8fdcf312 JH |
343 | if (!ce_stage(ce)) { |
344 | errs |= checkout_entry(ce, &state, NULL); | |
345 | continue; | |
346 | } | |
f9022075 SB |
347 | if (opts->writeout_stage) |
348 | errs |= checkout_stage(opts->writeout_stage, ce, pos, &state); | |
349 | else if (opts->merge) | |
0cf8581e | 350 | errs |= checkout_merged(pos, &state); |
8fdcf312 | 351 | pos = skip_same_name(ce, pos) - 1; |
782c2d65 DB |
352 | } |
353 | } | |
354 | ||
03b86647 | 355 | if (write_locked_index(&the_index, lock_file, COMMIT_LOCK)) |
e8a8a4d7 | 356 | die(_("unable to write new index file")); |
75336878 | 357 | |
c6893323 | 358 | read_ref_full("HEAD", rev, 0, &flag); |
782c2d65 DB |
359 | head = lookup_commit_reference_gently(rev, 1); |
360 | ||
d2b3691b JH |
361 | errs |= post_checkout_hook(head, head, 0); |
362 | return errs; | |
782c2d65 DB |
363 | } |
364 | ||
a2b4994c NTND |
365 | static void show_local_changes(struct object *head, |
366 | const struct diff_options *opts) | |
782c2d65 DB |
367 | { |
368 | struct rev_info rev; | |
369 | /* I think we want full paths, even if we're in a subdirectory. */ | |
370 | init_revisions(&rev, NULL); | |
175f6e59 | 371 | rev.diffopt.flags = opts->flags; |
782c2d65 | 372 | rev.diffopt.output_format |= DIFF_FORMAT_NAME_STATUS; |
28452655 | 373 | diff_setup_done(&rev.diffopt); |
782c2d65 DB |
374 | add_pending_object(&rev, head, NULL); |
375 | run_diff_index(&rev, 0); | |
376 | } | |
377 | ||
b3c0494a | 378 | static void describe_detached_head(const char *msg, struct commit *commit) |
782c2d65 | 379 | { |
f285a2d7 | 380 | struct strbuf sb = STRBUF_INIT; |
3c621839 JK |
381 | if (!parse_commit(commit)) |
382 | pp_commit_easy(CMIT_FMT_ONELINE, commit, &sb); | |
782c2d65 DB |
383 | fprintf(stderr, "%s %s... %s\n", msg, |
384 | find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV), sb.buf); | |
385 | strbuf_release(&sb); | |
386 | } | |
387 | ||
a2b4994c NTND |
388 | static int reset_tree(struct tree *tree, const struct checkout_opts *o, |
389 | int worktree, int *writeout_error) | |
782c2d65 DB |
390 | { |
391 | struct unpack_trees_options opts; | |
392 | struct tree_desc tree_desc; | |
bc052d7f | 393 | |
782c2d65 DB |
394 | memset(&opts, 0, sizeof(opts)); |
395 | opts.head_idx = -1; | |
6286a08d JH |
396 | opts.update = worktree; |
397 | opts.skip_unmerged = !worktree; | |
782c2d65 DB |
398 | opts.reset = 1; |
399 | opts.merge = 1; | |
400 | opts.fn = oneway_merge; | |
e9fc64c6 | 401 | opts.verbose_update = !o->quiet && isatty(2); |
34110cd4 LT |
402 | opts.src_index = &the_index; |
403 | opts.dst_index = &the_index; | |
782c2d65 DB |
404 | parse_tree(tree); |
405 | init_tree_desc(&tree_desc, tree->buffer, tree->size); | |
291d823e JH |
406 | switch (unpack_trees(1, &tree_desc, &opts)) { |
407 | case -2: | |
a2b4994c | 408 | *writeout_error = 1; |
291d823e JH |
409 | /* |
410 | * We return 0 nevertheless, as the index is all right | |
411 | * and more importantly we have made best efforts to | |
412 | * update paths in the work tree, and we cannot revert | |
413 | * them. | |
414 | */ | |
415 | case 0: | |
416 | return 0; | |
417 | default: | |
84a5750b | 418 | return 128; |
291d823e | 419 | } |
782c2d65 DB |
420 | } |
421 | ||
782c2d65 DB |
422 | struct branch_info { |
423 | const char *name; /* The short name used */ | |
424 | const char *path; /* The full name of a real branch */ | |
425 | struct commit *commit; /* The named commit */ | |
426 | }; | |
427 | ||
428 | static void setup_branch_path(struct branch_info *branch) | |
429 | { | |
f285a2d7 | 430 | struct strbuf buf = STRBUF_INIT; |
ae5a6c36 | 431 | |
a552de75 JH |
432 | strbuf_branchname(&buf, branch->name); |
433 | if (strcmp(buf.buf, branch->name)) | |
ae5a6c36 | 434 | branch->name = xstrdup(buf.buf); |
a552de75 | 435 | strbuf_splice(&buf, 0, 0, "refs/heads/", 11); |
782c2d65 DB |
436 | branch->path = strbuf_detach(&buf, NULL); |
437 | } | |
438 | ||
a2b4994c NTND |
439 | static int merge_working_tree(const struct checkout_opts *opts, |
440 | struct branch_info *old, | |
441 | struct branch_info *new, | |
442 | int *writeout_error) | |
782c2d65 DB |
443 | { |
444 | int ret; | |
445 | struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file)); | |
b96524f8 | 446 | |
03b86647 | 447 | hold_locked_index(lock_file, 1); |
53996fe5 | 448 | if (read_cache_preload(NULL) < 0) |
e8a8a4d7 | 449 | return error(_("corrupt index file")); |
782c2d65 | 450 | |
cfc5789a | 451 | resolve_undo_clear(); |
782c2d65 | 452 | if (opts->force) { |
a2b4994c | 453 | ret = reset_tree(new->commit->tree, opts, 1, writeout_error); |
782c2d65 DB |
454 | if (ret) |
455 | return ret; | |
456 | } else { | |
457 | struct tree_desc trees[2]; | |
458 | struct tree *tree; | |
459 | struct unpack_trees_options topts; | |
bc052d7f | 460 | |
782c2d65 DB |
461 | memset(&topts, 0, sizeof(topts)); |
462 | topts.head_idx = -1; | |
34110cd4 LT |
463 | topts.src_index = &the_index; |
464 | topts.dst_index = &the_index; | |
782c2d65 | 465 | |
e294030f | 466 | setup_unpack_trees_porcelain(&topts, "checkout"); |
8ccba008 | 467 | |
782c2d65 DB |
468 | refresh_cache(REFRESH_QUIET); |
469 | ||
470 | if (unmerged_cache()) { | |
e8a8a4d7 | 471 | error(_("you need to resolve your current index first")); |
04c9e11f | 472 | return 1; |
782c2d65 | 473 | } |
04c9e11f JH |
474 | |
475 | /* 2-way merge to the new branch */ | |
fa7b3c2f | 476 | topts.initial_checkout = is_cache_unborn(); |
04c9e11f JH |
477 | topts.update = 1; |
478 | topts.merge = 1; | |
64da3ae5 | 479 | topts.gently = opts->merge && old->commit; |
e9fc64c6 | 480 | topts.verbose_update = !opts->quiet && isatty(2); |
04c9e11f | 481 | topts.fn = twoway_merge; |
c1d7036b NTND |
482 | if (opts->overwrite_ignore) { |
483 | topts.dir = xcalloc(1, sizeof(*topts.dir)); | |
484 | topts.dir->flags |= DIR_SHOW_IGNORED; | |
485 | setup_standard_excludes(topts.dir); | |
486 | } | |
cc580af8 JK |
487 | tree = parse_tree_indirect(old->commit ? |
488 | old->commit->object.sha1 : | |
dab0d410 | 489 | EMPTY_TREE_SHA1_BIN); |
04c9e11f JH |
490 | init_tree_desc(&trees[0], tree->buffer, tree->size); |
491 | tree = parse_tree_indirect(new->commit->object.sha1); | |
492 | init_tree_desc(&trees[1], tree->buffer, tree->size); | |
493 | ||
291d823e | 494 | ret = unpack_trees(2, trees, &topts); |
49d833dc | 495 | if (ret == -1) { |
782c2d65 DB |
496 | /* |
497 | * Unpack couldn't do a trivial merge; either | |
498 | * give up or do a real merge, depending on | |
499 | * whether the merge flag was used. | |
500 | */ | |
501 | struct tree *result; | |
502 | struct tree *work; | |
8a2fce18 | 503 | struct merge_options o; |
782c2d65 DB |
504 | if (!opts->merge) |
505 | return 1; | |
64da3ae5 JH |
506 | |
507 | /* | |
508 | * Without old->commit, the below is the same as | |
509 | * the two-tree unpack we already tried and failed. | |
510 | */ | |
511 | if (!old->commit) | |
512 | return 1; | |
782c2d65 DB |
513 | |
514 | /* Do more real merge */ | |
515 | ||
516 | /* | |
517 | * We update the index fully, then write the | |
518 | * tree from the index, then merge the new | |
519 | * branch with the current tree, with the old | |
520 | * branch as the base. Then we reset the index | |
521 | * (but not the working tree) to the new | |
522 | * branch, leaving the working tree as the | |
523 | * merged version, but skipping unmerged | |
524 | * entries in the index. | |
525 | */ | |
526 | ||
7ae02a30 | 527 | add_files_to_cache(NULL, NULL, 0); |
7610fa57 JN |
528 | /* |
529 | * NEEDSWORK: carrying over local changes | |
530 | * when branches have different end-of-line | |
531 | * normalization (or clean+smudge rules) is | |
532 | * a pain; plumb in an option to set | |
533 | * o.renormalize? | |
534 | */ | |
8a2fce18 MV |
535 | init_merge_options(&o); |
536 | o.verbosity = 0; | |
537 | work = write_tree_from_memory(&o); | |
782c2d65 | 538 | |
a2b4994c NTND |
539 | ret = reset_tree(new->commit->tree, opts, 1, |
540 | writeout_error); | |
782c2d65 DB |
541 | if (ret) |
542 | return ret; | |
c4151629 | 543 | o.ancestor = old->name; |
8a2fce18 MV |
544 | o.branch1 = new->name; |
545 | o.branch2 = "local"; | |
546 | merge_trees(&o, new->commit->tree, work, | |
547 | old->commit->tree, &result); | |
a2b4994c NTND |
548 | ret = reset_tree(new->commit->tree, opts, 0, |
549 | writeout_error); | |
84a5750b JH |
550 | if (ret) |
551 | return ret; | |
782c2d65 DB |
552 | } |
553 | } | |
554 | ||
03b86647 | 555 | if (write_locked_index(&the_index, lock_file, COMMIT_LOCK)) |
e8a8a4d7 | 556 | die(_("unable to write new index file")); |
782c2d65 | 557 | |
7fe4a728 | 558 | if (!opts->force && !opts->quiet) |
175f6e59 | 559 | show_local_changes(&new->commit->object, &opts->diff_options); |
782c2d65 DB |
560 | |
561 | return 0; | |
562 | } | |
563 | ||
6d21bf96 | 564 | static void report_tracking(struct branch_info *new) |
79a1e6b4 | 565 | { |
6d21bf96 | 566 | struct strbuf sb = STRBUF_INIT; |
b56fca07 | 567 | struct branch *branch = branch_get(new->name); |
79a1e6b4 | 568 | |
6d21bf96 | 569 | if (!format_tracking_info(branch, &sb)) |
79a1e6b4 | 570 | return; |
6d21bf96 JH |
571 | fputs(sb.buf, stdout); |
572 | strbuf_release(&sb); | |
b0030db3 | 573 | } |
79a1e6b4 | 574 | |
a2b4994c | 575 | static void update_refs_for_switch(const struct checkout_opts *opts, |
782c2d65 DB |
576 | struct branch_info *old, |
577 | struct branch_info *new) | |
578 | { | |
f285a2d7 | 579 | struct strbuf msg = STRBUF_INIT; |
3bed291a | 580 | const char *old_desc, *reflog_msg; |
782c2d65 | 581 | if (opts->new_branch) { |
3631bf77 EM |
582 | if (opts->new_orphan_branch) { |
583 | if (opts->new_branch_log && !log_all_ref_updates) { | |
584 | int temp; | |
157aaea5 | 585 | char log_file[PATH_MAX]; |
3631bf77 EM |
586 | char *ref_name = mkpath("refs/heads/%s", opts->new_orphan_branch); |
587 | ||
588 | temp = log_all_ref_updates; | |
589 | log_all_ref_updates = 1; | |
157aaea5 | 590 | if (log_ref_setup(ref_name, log_file, sizeof(log_file))) { |
e8a8a4d7 | 591 | fprintf(stderr, _("Can not do reflog for '%s'\n"), |
3631bf77 EM |
592 | opts->new_orphan_branch); |
593 | log_all_ref_updates = temp; | |
594 | return; | |
595 | } | |
596 | log_all_ref_updates = temp; | |
597 | } | |
598 | } | |
599 | else | |
02ac9837 TRC |
600 | create_branch(old->name, opts->new_branch, new->name, |
601 | opts->new_branch_force ? 1 : 0, | |
39bd6f72 JN |
602 | opts->new_branch_log, |
603 | opts->new_branch_force ? 1 : 0, | |
f9a482e6 | 604 | opts->quiet, |
39bd6f72 | 605 | opts->track); |
782c2d65 DB |
606 | new->name = opts->new_branch; |
607 | setup_branch_path(new); | |
608 | } | |
609 | ||
782c2d65 | 610 | old_desc = old->name; |
323e00fd | 611 | if (!old_desc && old->commit) |
782c2d65 | 612 | old_desc = sha1_to_hex(old->commit->object.sha1); |
3bed291a RR |
613 | |
614 | reflog_msg = getenv("GIT_REFLOG_ACTION"); | |
615 | if (!reflog_msg) | |
616 | strbuf_addf(&msg, "checkout: moving from %s to %s", | |
617 | old_desc ? old_desc : "(invalid)", new->name); | |
618 | else | |
619 | strbuf_insert(&msg, 0, reflog_msg, strlen(reflog_msg)); | |
782c2d65 | 620 | |
f8bd36a4 JN |
621 | if (!strcmp(new->name, "HEAD") && !new->path && !opts->force_detach) { |
622 | /* Nothing to do. */ | |
623 | } else if (opts->force_detach || !new->path) { /* No longer on any branch. */ | |
624 | update_ref(msg.buf, "HEAD", new->commit->object.sha1, NULL, | |
f4124112 | 625 | REF_NODEREF, UPDATE_REFS_DIE_ON_ERR); |
f8bd36a4 JN |
626 | if (!opts->quiet) { |
627 | if (old->path && advice_detached_head) | |
2857093b | 628 | detach_advice(new->name); |
6c80cd29 | 629 | describe_detached_head(_("HEAD is now at"), new->commit); |
f8bd36a4 JN |
630 | } |
631 | } else if (new->path) { /* Switch branches. */ | |
782c2d65 DB |
632 | create_symref("HEAD", new->path, msg.buf); |
633 | if (!opts->quiet) { | |
08eaa4be | 634 | if (old->path && !strcmp(new->path, old->path)) { |
39bd6f72 JN |
635 | if (opts->new_branch_force) |
636 | fprintf(stderr, _("Reset branch '%s'\n"), | |
637 | new->name); | |
638 | else | |
639 | fprintf(stderr, _("Already on '%s'\n"), | |
640 | new->name); | |
08eaa4be ÆAB |
641 | } else if (opts->new_branch) { |
642 | if (opts->branch_exists) | |
643 | fprintf(stderr, _("Switched to and reset branch '%s'\n"), new->name); | |
644 | else | |
645 | fprintf(stderr, _("Switched to a new branch '%s'\n"), new->name); | |
646 | } else { | |
e8a8a4d7 | 647 | fprintf(stderr, _("Switched to branch '%s'\n"), |
09a0ec58 | 648 | new->name); |
08eaa4be | 649 | } |
782c2d65 | 650 | } |
3631bf77 | 651 | if (old->path && old->name) { |
482b8f32 | 652 | if (!ref_exists(old->path) && reflog_exists(old->path)) |
4da58835 | 653 | delete_reflog(old->path); |
3631bf77 | 654 | } |
782c2d65 DB |
655 | } |
656 | remove_branch_state(); | |
657 | strbuf_release(&msg); | |
32669671 JH |
658 | if (!opts->quiet && |
659 | (new->path || (!opts->force_detach && !strcmp(new->name, "HEAD")))) | |
6d21bf96 | 660 | report_tracking(new); |
782c2d65 DB |
661 | } |
662 | ||
468224e5 RS |
663 | static int add_pending_uninteresting_ref(const char *refname, |
664 | const unsigned char *sha1, | |
665 | int flags, void *cb_data) | |
8e2dc6ac | 666 | { |
add416a6 | 667 | add_pending_sha1(cb_data, refname, sha1, UNINTERESTING); |
5c08dc48 JK |
668 | return 0; |
669 | } | |
8e2dc6ac JH |
670 | |
671 | static void describe_one_orphan(struct strbuf *sb, struct commit *commit) | |
672 | { | |
0be240cc JK |
673 | strbuf_addstr(sb, " "); |
674 | strbuf_addstr(sb, | |
675 | find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV)); | |
676 | strbuf_addch(sb, ' '); | |
3c621839 JK |
677 | if (!parse_commit(commit)) |
678 | pp_commit_easy(CMIT_FMT_ONELINE, commit, sb); | |
8e2dc6ac JH |
679 | strbuf_addch(sb, '\n'); |
680 | } | |
681 | ||
682 | #define ORPHAN_CUTOFF 4 | |
683 | static void suggest_reattach(struct commit *commit, struct rev_info *revs) | |
684 | { | |
685 | struct commit *c, *last = NULL; | |
686 | struct strbuf sb = STRBUF_INIT; | |
687 | int lost = 0; | |
688 | while ((c = get_revision(revs)) != NULL) { | |
689 | if (lost < ORPHAN_CUTOFF) | |
690 | describe_one_orphan(&sb, c); | |
691 | last = c; | |
692 | lost++; | |
693 | } | |
694 | if (ORPHAN_CUTOFF < lost) { | |
695 | int more = lost - ORPHAN_CUTOFF; | |
696 | if (more == 1) | |
697 | describe_one_orphan(&sb, last); | |
698 | else | |
f06f08b7 | 699 | strbuf_addf(&sb, _(" ... and %d more.\n"), more); |
8e2dc6ac JH |
700 | } |
701 | ||
702 | fprintf(stderr, | |
f06f08b7 ÆAB |
703 | Q_( |
704 | /* The singular version */ | |
705 | "Warning: you are leaving %d commit behind, " | |
706 | "not connected to\n" | |
707 | "any of your branches:\n\n" | |
0faf2474 | 708 | "%s\n", |
f06f08b7 ÆAB |
709 | /* The plural version */ |
710 | "Warning: you are leaving %d commits behind, " | |
8e2dc6ac JH |
711 | "not connected to\n" |
712 | "any of your branches:\n\n" | |
f807b3dc | 713 | "%s\n", |
f06f08b7 ÆAB |
714 | /* Give ngettext() the count */ |
715 | lost), | |
716 | lost, | |
f807b3dc | 717 | sb.buf); |
8e2dc6ac | 718 | strbuf_release(&sb); |
f807b3dc JH |
719 | |
720 | if (advice_detached_head) | |
721 | fprintf(stderr, | |
0faf2474 | 722 | _( |
f807b3dc JH |
723 | "If you want to keep them by creating a new branch, " |
724 | "this may be a good time\nto do so with:\n\n" | |
0faf2474 | 725 | " git branch new_branch_name %s\n\n"), |
d6e14660 | 726 | find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV)); |
8e2dc6ac JH |
727 | } |
728 | ||
729 | /* | |
730 | * We are about to leave commit that was at the tip of a detached | |
731 | * HEAD. If it is not reachable from any ref, this is the last chance | |
732 | * for the user to do so without resorting to reflog. | |
733 | */ | |
5d886395 | 734 | static void orphaned_commit_warning(struct commit *old, struct commit *new) |
8e2dc6ac | 735 | { |
8e2dc6ac | 736 | struct rev_info revs; |
5d886395 | 737 | struct object *object = &old->object; |
10621419 | 738 | struct object_array refs; |
8e2dc6ac JH |
739 | |
740 | init_revisions(&revs, NULL); | |
468224e5 RS |
741 | setup_revisions(0, NULL, &revs, NULL); |
742 | ||
743 | object->flags &= ~UNINTERESTING; | |
744 | add_pending_object(&revs, object, sha1_to_hex(object->sha1)); | |
745 | ||
746 | for_each_ref(add_pending_uninteresting_ref, &revs); | |
5d886395 | 747 | add_pending_sha1(&revs, "HEAD", new->object.sha1, UNINTERESTING); |
468224e5 | 748 | |
10621419 RS |
749 | refs = revs.pending; |
750 | revs.leak_pending = 1; | |
751 | ||
8e2dc6ac | 752 | if (prepare_revision_walk(&revs)) |
6c80cd29 | 753 | die(_("internal error in revision walk")); |
5d886395 JS |
754 | if (!(old->object.flags & UNINTERESTING)) |
755 | suggest_reattach(old, &revs); | |
8e2dc6ac | 756 | else |
5d886395 | 757 | describe_detached_head(_("Previous HEAD position was"), old); |
5c08dc48 | 758 | |
86a0a408 | 759 | clear_commit_marks_for_object_array(&refs, ALL_REV_FLAGS); |
10621419 | 760 | free(refs.objects); |
8e2dc6ac JH |
761 | } |
762 | ||
e51e3057 NTND |
763 | static int switch_branches(const struct checkout_opts *opts, |
764 | struct branch_info *new) | |
782c2d65 DB |
765 | { |
766 | int ret = 0; | |
767 | struct branch_info old; | |
96ec7b1e | 768 | void *path_to_free; |
782c2d65 | 769 | unsigned char rev[20]; |
a2b4994c | 770 | int flag, writeout_error = 0; |
782c2d65 | 771 | memset(&old, 0, sizeof(old)); |
96ec7b1e | 772 | old.path = path_to_free = resolve_refdup("HEAD", rev, 0, &flag); |
782c2d65 | 773 | old.commit = lookup_commit_reference_gently(rev, 1); |
96ec7b1e | 774 | if (!(flag & REF_ISSYMREF)) |
782c2d65 DB |
775 | old.path = NULL; |
776 | ||
95b567c7 JK |
777 | if (old.path) |
778 | skip_prefix(old.path, "refs/heads/", &old.name); | |
782c2d65 DB |
779 | |
780 | if (!new->name) { | |
781 | new->name = "HEAD"; | |
782 | new->commit = old.commit; | |
783 | if (!new->commit) | |
e8a8a4d7 | 784 | die(_("You are on a branch yet to be born")); |
683ff884 | 785 | parse_commit_or_die(new->commit); |
782c2d65 DB |
786 | } |
787 | ||
a2b4994c | 788 | ret = merge_working_tree(opts, &old, new, &writeout_error); |
96ec7b1e NTND |
789 | if (ret) { |
790 | free(path_to_free); | |
782c2d65 | 791 | return ret; |
96ec7b1e | 792 | } |
782c2d65 | 793 | |
77ebd56d | 794 | if (!opts->quiet && !old.path && old.commit && new->commit != old.commit) |
5d886395 | 795 | orphaned_commit_warning(old.commit, new->commit); |
77ebd56d | 796 | |
782c2d65 DB |
797 | update_refs_for_switch(opts, &old, new); |
798 | ||
291d823e | 799 | ret = post_checkout_hook(old.commit, new->commit, 1); |
96ec7b1e | 800 | free(path_to_free); |
a2b4994c | 801 | return ret || writeout_error; |
782c2d65 DB |
802 | } |
803 | ||
0cf8581e JH |
804 | static int git_checkout_config(const char *var, const char *value, void *cb) |
805 | { | |
175f6e59 JS |
806 | if (!strcmp(var, "diff.ignoresubmodules")) { |
807 | struct checkout_opts *opts = cb; | |
808 | handle_ignore_submodules_arg(&opts->diff_options, value); | |
809 | return 0; | |
810 | } | |
23b4c7bc | 811 | |
59556548 | 812 | if (starts_with(var, "submodule.")) |
23b4c7bc JL |
813 | return parse_submodule_config_option(var, value); |
814 | ||
175f6e59 | 815 | return git_xmerge_config(var, value, NULL); |
0cf8581e JH |
816 | } |
817 | ||
70c9ac2f | 818 | struct tracking_name_data { |
fa83a33b JH |
819 | /* const */ char *src_ref; |
820 | char *dst_ref; | |
821 | unsigned char *dst_sha1; | |
70c9ac2f JH |
822 | int unique; |
823 | }; | |
824 | ||
fa83a33b | 825 | static int check_tracking_name(struct remote *remote, void *cb_data) |
70c9ac2f JH |
826 | { |
827 | struct tracking_name_data *cb = cb_data; | |
fa83a33b JH |
828 | struct refspec query; |
829 | memset(&query, 0, sizeof(struct refspec)); | |
830 | query.src = cb->src_ref; | |
831 | if (remote_find_tracking(remote, &query) || | |
2c484202 BC |
832 | get_sha1(query.dst, cb->dst_sha1)) { |
833 | free(query.dst); | |
70c9ac2f | 834 | return 0; |
2c484202 | 835 | } |
fa83a33b | 836 | if (cb->dst_ref) { |
2c484202 | 837 | free(query.dst); |
70c9ac2f JH |
838 | cb->unique = 0; |
839 | return 0; | |
840 | } | |
2c484202 | 841 | cb->dst_ref = query.dst; |
70c9ac2f JH |
842 | return 0; |
843 | } | |
844 | ||
fa83a33b | 845 | static const char *unique_tracking_name(const char *name, unsigned char *sha1) |
70c9ac2f | 846 | { |
fa83a33b JH |
847 | struct tracking_name_data cb_data = { NULL, NULL, NULL, 1 }; |
848 | char src_ref[PATH_MAX]; | |
849 | snprintf(src_ref, PATH_MAX, "refs/heads/%s", name); | |
850 | cb_data.src_ref = src_ref; | |
851 | cb_data.dst_sha1 = sha1; | |
852 | for_each_remote(check_tracking_name, &cb_data); | |
70c9ac2f | 853 | if (cb_data.unique) |
fa83a33b JH |
854 | return cb_data.dst_ref; |
855 | free(cb_data.dst_ref); | |
70c9ac2f JH |
856 | return NULL; |
857 | } | |
4f353658 | 858 | |
09ebad6f JN |
859 | static int parse_branchname_arg(int argc, const char **argv, |
860 | int dwim_new_local_branch_ok, | |
861 | struct branch_info *new, | |
862 | struct tree **source_tree, | |
863 | unsigned char rev[20], | |
864 | const char **new_branch) | |
865 | { | |
866 | int argcount = 0; | |
867 | unsigned char branch_rev[20]; | |
868 | const char *arg; | |
bca39695 MM |
869 | int dash_dash_pos; |
870 | int has_dash_dash = 0; | |
871 | int i; | |
09ebad6f JN |
872 | |
873 | /* | |
874 | * case 1: git checkout <ref> -- [<paths>] | |
875 | * | |
876 | * <ref> must be a valid tree, everything after the '--' must be | |
877 | * a path. | |
878 | * | |
879 | * case 2: git checkout -- [<paths>] | |
880 | * | |
881 | * everything after the '--' must be paths. | |
882 | * | |
a047fafc | 883 | * case 3: git checkout <something> [--] |
09ebad6f | 884 | * |
a047fafc MM |
885 | * (a) If <something> is a commit, that is to |
886 | * switch to the branch or detach HEAD at it. As a special case, | |
887 | * if <something> is A...B (missing A or B means HEAD but you can | |
888 | * omit at most one side), and if there is a unique merge base | |
889 | * between A and B, A...B names that merge base. | |
09ebad6f | 890 | * |
a047fafc | 891 | * (b) If <something> is _not_ a commit, either "--" is present |
01689909 | 892 | * or <something> is not a path, no -t or -b was given, and |
a047fafc MM |
893 | * and there is a tracking branch whose name is <something> |
894 | * in one and only one remote, then this is a short-hand to | |
895 | * fork local <something> from that remote-tracking branch. | |
09ebad6f | 896 | * |
a047fafc MM |
897 | * (c) Otherwise, if "--" is present, treat it like case (1). |
898 | * | |
899 | * (d) Otherwise : | |
900 | * - if it's a reference, treat it like case (1) | |
901 | * - else if it's a path, treat it like case (2) | |
902 | * - else: fail. | |
903 | * | |
904 | * case 4: git checkout <something> <paths> | |
905 | * | |
906 | * The first argument must not be ambiguous. | |
09ebad6f JN |
907 | * - If it's *only* a reference, treat it like case (1). |
908 | * - If it's only a path, treat it like case (2). | |
909 | * - else: fail. | |
910 | * | |
911 | */ | |
912 | if (!argc) | |
913 | return 0; | |
914 | ||
09ebad6f | 915 | arg = argv[0]; |
bca39695 MM |
916 | dash_dash_pos = -1; |
917 | for (i = 0; i < argc; i++) { | |
918 | if (!strcmp(argv[i], "--")) { | |
919 | dash_dash_pos = i; | |
920 | break; | |
921 | } | |
922 | } | |
923 | if (dash_dash_pos == 0) | |
924 | return 1; /* case (2) */ | |
925 | else if (dash_dash_pos == 1) | |
926 | has_dash_dash = 1; /* case (3) or (1) */ | |
927 | else if (dash_dash_pos >= 2) | |
928 | die(_("only one reference expected, %d given."), dash_dash_pos); | |
09ebad6f JN |
929 | |
930 | if (!strcmp(arg, "-")) | |
931 | arg = "@{-1}"; | |
932 | ||
933 | if (get_sha1_mb(arg, rev)) { | |
a047fafc MM |
934 | /* |
935 | * Either case (3) or (4), with <something> not being | |
936 | * a commit, or an attempt to use case (1) with an | |
937 | * invalid ref. | |
938 | * | |
939 | * It's likely an error, but we need to find out if | |
940 | * we should auto-create the branch, case (3).(b). | |
941 | */ | |
942 | int recover_with_dwim = dwim_new_local_branch_ok; | |
943 | ||
944 | if (check_filename(NULL, arg) && !has_dash_dash) | |
945 | recover_with_dwim = 0; | |
946 | /* | |
947 | * Accept "git checkout foo" and "git checkout foo --" | |
948 | * as candidates for dwim. | |
949 | */ | |
950 | if (!(argc == 1 && !has_dash_dash) && | |
951 | !(argc == 2 && has_dash_dash)) | |
952 | recover_with_dwim = 0; | |
953 | ||
954 | if (recover_with_dwim) { | |
fa83a33b | 955 | const char *remote = unique_tracking_name(arg, rev); |
a047fafc MM |
956 | if (remote) { |
957 | *new_branch = arg; | |
958 | arg = remote; | |
959 | /* DWIMmed to create local branch, case (3).(b) */ | |
960 | } else { | |
961 | recover_with_dwim = 0; | |
962 | } | |
963 | } | |
964 | ||
965 | if (!recover_with_dwim) { | |
966 | if (has_dash_dash) | |
967 | die(_("invalid reference: %s"), arg); | |
09ebad6f JN |
968 | return argcount; |
969 | } | |
970 | } | |
971 | ||
972 | /* we can't end up being in (2) anymore, eat the argument */ | |
973 | argcount++; | |
974 | argv++; | |
975 | argc--; | |
976 | ||
977 | new->name = arg; | |
978 | setup_branch_path(new); | |
979 | ||
8d9c5010 | 980 | if (!check_refname_format(new->path, 0) && |
c6893323 | 981 | !read_ref(new->path, branch_rev)) |
09ebad6f JN |
982 | hashcpy(rev, branch_rev); |
983 | else | |
984 | new->path = NULL; /* not an existing branch */ | |
985 | ||
986 | new->commit = lookup_commit_reference_gently(rev, 1); | |
987 | if (!new->commit) { | |
988 | /* not a commit */ | |
989 | *source_tree = parse_tree_indirect(rev); | |
990 | } else { | |
683ff884 | 991 | parse_commit_or_die(new->commit); |
09ebad6f JN |
992 | *source_tree = new->commit->tree; |
993 | } | |
994 | ||
995 | if (!*source_tree) /* case (1): want a tree */ | |
6c80cd29 | 996 | die(_("reference is not a tree: %s"), arg); |
a047fafc | 997 | if (!has_dash_dash) {/* case (3).(d) -> (1) */ |
09ebad6f JN |
998 | /* |
999 | * Do not complain the most common case | |
1000 | * git checkout branch | |
1001 | * even if there happen to be a file called 'branch'; | |
1002 | * it would be extremely annoying. | |
1003 | */ | |
1004 | if (argc) | |
1005 | verify_non_filename(NULL, arg); | |
1006 | } else { | |
1007 | argcount++; | |
1008 | argv++; | |
1009 | argc--; | |
1010 | } | |
1011 | ||
1012 | return argcount; | |
1013 | } | |
1014 | ||
a2b4994c | 1015 | static int switch_unborn_to_new_branch(const struct checkout_opts *opts) |
abe19980 JH |
1016 | { |
1017 | int status; | |
1018 | struct strbuf branch_ref = STRBUF_INIT; | |
1019 | ||
8ced1aa0 CW |
1020 | if (!opts->new_branch) |
1021 | die(_("You are on a branch yet to be born")); | |
abe19980 JH |
1022 | strbuf_addf(&branch_ref, "refs/heads/%s", opts->new_branch); |
1023 | status = create_symref("HEAD", branch_ref.buf, "checkout -b"); | |
1024 | strbuf_release(&branch_ref); | |
afa8c07a JK |
1025 | if (!opts->quiet) |
1026 | fprintf(stderr, _("Switched to a new branch '%s'\n"), | |
1027 | opts->new_branch); | |
abe19980 JH |
1028 | return status; |
1029 | } | |
1030 | ||
b6312c27 NTND |
1031 | static int checkout_branch(struct checkout_opts *opts, |
1032 | struct branch_info *new) | |
1033 | { | |
817b345a | 1034 | if (opts->pathspec.nr) |
b6312c27 NTND |
1035 | die(_("paths cannot be used with switching branches")); |
1036 | ||
1037 | if (opts->patch_mode) | |
1038 | die(_("'%s' cannot be used with switching branches"), | |
1039 | "--patch"); | |
1040 | ||
1041 | if (opts->writeout_stage) | |
1042 | die(_("'%s' cannot be used with switching branches"), | |
1043 | "--ours/--theirs"); | |
1044 | ||
1045 | if (opts->force && opts->merge) | |
1046 | die(_("'%s' cannot be used with '%s'"), "-f", "-m"); | |
1047 | ||
1048 | if (opts->force_detach && opts->new_branch) | |
1049 | die(_("'%s' cannot be used with '%s'"), | |
1050 | "--detach", "-b/-B/--orphan"); | |
1051 | ||
1052 | if (opts->new_orphan_branch) { | |
1053 | if (opts->track != BRANCH_TRACK_UNSPECIFIED) | |
1054 | die(_("'%s' cannot be used with '%s'"), "--orphan", "-t"); | |
1055 | } else if (opts->force_detach) { | |
1056 | if (opts->track != BRANCH_TRACK_UNSPECIFIED) | |
1057 | die(_("'%s' cannot be used with '%s'"), "--detach", "-t"); | |
1058 | } else if (opts->track == BRANCH_TRACK_UNSPECIFIED) | |
1059 | opts->track = git_branch_track; | |
1060 | ||
1061 | if (new->name && !new->commit) | |
1062 | die(_("Cannot switch branch to a non-commit '%s'"), | |
1063 | new->name); | |
1064 | ||
1065 | if (!new->commit && opts->new_branch) { | |
1066 | unsigned char rev[20]; | |
1067 | int flag; | |
1068 | ||
1069 | if (!read_ref_full("HEAD", rev, 0, &flag) && | |
1070 | (flag & REF_ISSYMREF) && is_null_sha1(rev)) | |
1071 | return switch_unborn_to_new_branch(opts); | |
1072 | } | |
1073 | return switch_branches(opts, new); | |
1074 | } | |
1075 | ||
782c2d65 DB |
1076 | int cmd_checkout(int argc, const char **argv, const char *prefix) |
1077 | { | |
1078 | struct checkout_opts opts; | |
782c2d65 | 1079 | struct branch_info new; |
eac5a401 | 1080 | char *conflict_style = NULL; |
46148dd7 | 1081 | int dwim_new_local_branch = 1; |
782c2d65 | 1082 | struct option options[] = { |
e05a1093 NTND |
1083 | OPT__QUIET(&opts.quiet, N_("suppress progress reporting")), |
1084 | OPT_STRING('b', NULL, &opts.new_branch, N_("branch"), | |
1085 | N_("create and checkout a new branch")), | |
1086 | OPT_STRING('B', NULL, &opts.new_branch_force, N_("branch"), | |
1087 | N_("create/reset and checkout a branch")), | |
d5d09d47 SB |
1088 | OPT_BOOL('l', NULL, &opts.new_branch_log, N_("create reflog for new branch")), |
1089 | OPT_BOOL(0, "detach", &opts.force_detach, N_("detach the HEAD at named commit")), | |
e05a1093 | 1090 | OPT_SET_INT('t', "track", &opts.track, N_("set upstream info for new branch"), |
9ed36cfa | 1091 | BRANCH_TRACK_EXPLICIT), |
e703d711 | 1092 | OPT_STRING(0, "orphan", &opts.new_orphan_branch, N_("new-branch"), N_("new unparented branch")), |
e05a1093 | 1093 | OPT_SET_INT('2', "ours", &opts.writeout_stage, N_("checkout our version for unmerged files"), |
38901a48 | 1094 | 2), |
e05a1093 | 1095 | OPT_SET_INT('3', "theirs", &opts.writeout_stage, N_("checkout their version for unmerged files"), |
38901a48 | 1096 | 3), |
e05a1093 | 1097 | OPT__FORCE(&opts.force, N_("force checkout (throw away local modifications)")), |
d5d09d47 SB |
1098 | OPT_BOOL('m', "merge", &opts.merge, N_("perform a 3-way merge with the new branch")), |
1099 | OPT_BOOL(0, "overwrite-ignore", &opts.overwrite_ignore, N_("update ignored files (default)")), | |
e05a1093 NTND |
1100 | OPT_STRING(0, "conflict", &conflict_style, N_("style"), |
1101 | N_("conflict style (merge or diff3)")), | |
d5d09d47 | 1102 | OPT_BOOL('p', "patch", &opts.patch_mode, N_("select hunks interactively")), |
08d595dc NTND |
1103 | OPT_BOOL(0, "ignore-skip-worktree-bits", &opts.ignore_skipworktree, |
1104 | N_("do not limit pathspecs to sparse entries only")), | |
4741edd5 SB |
1105 | OPT_HIDDEN_BOOL(0, "guess", &dwim_new_local_branch, |
1106 | N_("second guess 'git checkout no-such-branch'")), | |
b249b552 | 1107 | OPT_END(), |
782c2d65 DB |
1108 | }; |
1109 | ||
1110 | memset(&opts, 0, sizeof(opts)); | |
1111 | memset(&new, 0, sizeof(new)); | |
c1d7036b | 1112 | opts.overwrite_ignore = 1; |
e51e3057 | 1113 | opts.prefix = prefix; |
782c2d65 | 1114 | |
23b4c7bc | 1115 | gitmodules_config(); |
175f6e59 | 1116 | git_config(git_checkout_config, &opts); |
782c2d65 | 1117 | |
9188ed89 | 1118 | opts.track = BRANCH_TRACK_UNSPECIFIED; |
782c2d65 | 1119 | |
37782920 | 1120 | argc = parse_options(argc, argv, prefix, options, checkout_usage, |
f5242ebf | 1121 | PARSE_OPT_KEEP_DASHDASH); |
859fdaba | 1122 | |
b6312c27 NTND |
1123 | if (conflict_style) { |
1124 | opts.merge = 1; /* implied */ | |
1125 | git_xmerge_config("merge.conflictstyle", conflict_style, NULL); | |
1126 | } | |
02ac9837 | 1127 | |
b6312c27 NTND |
1128 | if ((!!opts.new_branch + !!opts.new_branch_force + !!opts.new_orphan_branch) > 1) |
1129 | die(_("-b, -B and --orphan are mutually exclusive")); | |
02ac9837 | 1130 | |
b6312c27 NTND |
1131 | /* |
1132 | * From here on, new_branch will contain the branch to be checked out, | |
1133 | * and new_branch_force and new_orphan_branch will tell us which one of | |
1134 | * -b/-B/--orphan is being used. | |
1135 | */ | |
02ac9837 TRC |
1136 | if (opts.new_branch_force) |
1137 | opts.new_branch = opts.new_branch_force; | |
1138 | ||
b6312c27 NTND |
1139 | if (opts.new_orphan_branch) |
1140 | opts.new_branch = opts.new_orphan_branch; | |
32669671 | 1141 | |
b6312c27 NTND |
1142 | /* --track without -b/-B/--orphan should DWIM */ |
1143 | if (opts.track != BRANCH_TRACK_UNSPECIFIED && !opts.new_branch) { | |
9188ed89 AR |
1144 | const char *argv0 = argv[0]; |
1145 | if (!argc || !strcmp(argv0, "--")) | |
e8a8a4d7 | 1146 | die (_("--track needs a branch name")); |
59556548 | 1147 | if (starts_with(argv0, "refs/")) |
9188ed89 | 1148 | argv0 += 5; |
59556548 | 1149 | if (starts_with(argv0, "remotes/")) |
9188ed89 AR |
1150 | argv0 += 8; |
1151 | argv0 = strchr(argv0, '/'); | |
1152 | if (!argv0 || !argv0[1]) | |
e8a8a4d7 | 1153 | die (_("Missing branch name; try -b")); |
9188ed89 | 1154 | opts.new_branch = argv0 + 1; |
bb0ceb62 JS |
1155 | } |
1156 | ||
859fdaba | 1157 | /* |
09ebad6f JN |
1158 | * Extract branch name from command line arguments, so |
1159 | * all that is left is pathspecs. | |
859fdaba | 1160 | * |
09ebad6f | 1161 | * Handle |
70c9ac2f | 1162 | * |
09ebad6f JN |
1163 | * 1) git checkout <tree> -- [<paths>] |
1164 | * 2) git checkout -- [<paths>] | |
1165 | * 3) git checkout <something> [<paths>] | |
859fdaba | 1166 | * |
09ebad6f JN |
1167 | * including "last branch" syntax and DWIM-ery for names of |
1168 | * remote branches, erroring out for invalid or ambiguous cases. | |
859fdaba | 1169 | */ |
782c2d65 | 1170 | if (argc) { |
e51e3057 | 1171 | unsigned char rev[20]; |
09ebad6f | 1172 | int dwim_ok = |
e51e3057 | 1173 | !opts.patch_mode && |
09ebad6f JN |
1174 | dwim_new_local_branch && |
1175 | opts.track == BRANCH_TRACK_UNSPECIFIED && | |
1176 | !opts.new_branch; | |
f8bd36a4 | 1177 | int n = parse_branchname_arg(argc, argv, dwim_ok, |
e51e3057 NTND |
1178 | &new, &opts.source_tree, |
1179 | rev, &opts.new_branch); | |
09ebad6f JN |
1180 | argv += n; |
1181 | argc -= n; | |
782c2d65 DB |
1182 | } |
1183 | ||
782c2d65 | 1184 | if (argc) { |
480ca644 NTND |
1185 | parse_pathspec(&opts.pathspec, 0, |
1186 | opts.patch_mode ? PATHSPEC_PREFIX_ORIGIN : 0, | |
1187 | prefix, argv); | |
301e42ed | 1188 | |
817b345a | 1189 | if (!opts.pathspec.nr) |
e8a8a4d7 | 1190 | die(_("invalid path specification")); |
301e42ed | 1191 | |
b6312c27 NTND |
1192 | /* |
1193 | * Try to give more helpful suggestion. | |
1194 | * new_branch && argc > 1 will be caught later. | |
1195 | */ | |
1196 | if (opts.new_branch && argc == 1) | |
1197 | die(_("Cannot update paths and switch to branch '%s' at the same time.\n" | |
1198 | "Did you intend to checkout '%s' which can not be resolved as commit?"), | |
1199 | opts.new_branch, argv[0]); | |
782c2d65 | 1200 | |
32669671 | 1201 | if (opts.force_detach) |
b6312c27 NTND |
1202 | die(_("git checkout: --detach does not take a path argument '%s'"), |
1203 | argv[0]); | |
32669671 | 1204 | |
0cf8581e | 1205 | if (1 < !!opts.writeout_stage + !!opts.force + !!opts.merge) |
b6312c27 NTND |
1206 | die(_("git checkout: --ours/--theirs, --force and --merge are incompatible when\n" |
1207 | "checking out of the index.")); | |
782c2d65 DB |
1208 | } |
1209 | ||
352eadc4 | 1210 | if (opts.new_branch) { |
f285a2d7 | 1211 | struct strbuf buf = STRBUF_INIT; |
55c4a673 | 1212 | |
b6312c27 NTND |
1213 | opts.branch_exists = |
1214 | validate_new_branchname(opts.new_branch, &buf, | |
1215 | !!opts.new_branch_force, | |
1216 | !!opts.new_branch_force); | |
55c4a673 | 1217 | |
352eadc4 DB |
1218 | strbuf_release(&buf); |
1219 | } | |
1220 | ||
817b345a | 1221 | if (opts.patch_mode || opts.pathspec.nr) |
b6312c27 NTND |
1222 | return checkout_paths(&opts, new.name); |
1223 | else | |
1224 | return checkout_branch(&opts, &new); | |
782c2d65 | 1225 | } |