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Commit | Line | Data |
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0e5a7faa CR |
1 | /* |
2 | * "git reset" builtin command | |
3 | * | |
4 | * Copyright (c) 2007 Carlos Rica | |
5 | * | |
6 | * Based on git-reset.sh, which is | |
7 | * | |
8 | * Copyright (c) 2005, 2006 Linus Torvalds and Junio C Hamano | |
9 | */ | |
c2e86add | 10 | #include "builtin.h" |
b2141fc1 | 11 | #include "config.h" |
697cc8ef | 12 | #include "lockfile.h" |
0e5a7faa CR |
13 | #include "tag.h" |
14 | #include "object.h" | |
15 | #include "commit.h" | |
16 | #include "run-command.h" | |
17 | #include "refs.h" | |
18 | #include "diff.h" | |
19 | #include "diffcore.h" | |
20 | #include "tree.h" | |
c369e7b8 | 21 | #include "branch.h" |
5eee6b28 | 22 | #include "parse-options.h" |
d0f379c2 SB |
23 | #include "unpack-trees.h" |
24 | #include "cache-tree.h" | |
35b96d1d SB |
25 | #include "submodule.h" |
26 | #include "submodule-config.h" | |
27 | ||
5eee6b28 | 28 | static const char * const git_reset_usage[] = { |
c1e9c2a7 | 29 | N_("git reset [--mixed | --soft | --hard | --merge | --keep] [-q] [<commit>]"), |
641c900b | 30 | N_("git reset [-q] [<tree-ish>] [--] <paths>..."), |
bf44142f | 31 | N_("git reset --patch [<tree-ish>] [--] [<paths>...]"), |
5eee6b28 CR |
32 | NULL |
33 | }; | |
0e5a7faa | 34 | |
9bc454df CC |
35 | enum reset_type { MIXED, SOFT, HARD, MERGE, KEEP, NONE }; |
36 | static const char *reset_type_names[] = { | |
8b2a57b6 | 37 | N_("mixed"), N_("soft"), N_("hard"), N_("merge"), N_("keep"), NULL |
9bc454df | 38 | }; |
9e8eceab | 39 | |
0e5a7faa CR |
40 | static inline int is_merge(void) |
41 | { | |
f932729c | 42 | return !access(git_path_merge_head(), F_OK); |
0e5a7faa CR |
43 | } |
44 | ||
3a5d7c55 | 45 | static int reset_index(const struct object_id *oid, int reset_type, int quiet) |
0e5a7faa | 46 | { |
afbb8838 | 47 | int i, nr = 0; |
d0f379c2 | 48 | struct tree_desc desc[2]; |
6c52ec8a | 49 | struct tree *tree; |
d0f379c2 | 50 | struct unpack_trees_options opts; |
afbb8838 | 51 | int ret = -1; |
0e5a7faa | 52 | |
d0f379c2 SB |
53 | memset(&opts, 0, sizeof(opts)); |
54 | opts.head_idx = 1; | |
55 | opts.src_index = &the_index; | |
56 | opts.dst_index = &the_index; | |
57 | opts.fn = oneway_merge; | |
58 | opts.merge = 1; | |
5aa965a0 | 59 | if (!quiet) |
d0f379c2 | 60 | opts.verbose_update = 1; |
9e8eceab | 61 | switch (reset_type) { |
9bc454df | 62 | case KEEP: |
9e8eceab | 63 | case MERGE: |
d0f379c2 | 64 | opts.update = 1; |
9e8eceab LT |
65 | break; |
66 | case HARD: | |
d0f379c2 | 67 | opts.update = 1; |
9e8eceab LT |
68 | /* fallthrough */ |
69 | default: | |
d0f379c2 | 70 | opts.reset = 1; |
9e8eceab | 71 | } |
0e5a7faa | 72 | |
d0f379c2 SB |
73 | read_cache_unmerged(); |
74 | ||
9bc454df | 75 | if (reset_type == KEEP) { |
3a5d7c55 | 76 | struct object_id head_oid; |
77 | if (get_oid("HEAD", &head_oid)) | |
b50a64e8 | 78 | return error(_("You do not have a valid HEAD.")); |
e9ce897b | 79 | if (!fill_tree_descriptor(desc + nr, &head_oid)) |
b50a64e8 | 80 | return error(_("Failed to find tree of HEAD.")); |
9bc454df CC |
81 | nr++; |
82 | opts.fn = twoway_merge; | |
83 | } | |
84 | ||
afbb8838 JK |
85 | if (!fill_tree_descriptor(desc + nr, oid)) { |
86 | error(_("Failed to find tree of %s."), oid_to_hex(oid)); | |
87 | goto out; | |
88 | } | |
e9ce897b JK |
89 | nr++; |
90 | ||
d0f379c2 | 91 | if (unpack_trees(nr, desc, &opts)) |
afbb8838 | 92 | goto out; |
6c52ec8a TR |
93 | |
94 | if (reset_type == MIXED || reset_type == HARD) { | |
a9dbc179 | 95 | tree = parse_tree_indirect(oid); |
e6c286e8 | 96 | prime_cache_tree(&the_index, tree); |
6c52ec8a TR |
97 | } |
98 | ||
afbb8838 JK |
99 | ret = 0; |
100 | ||
101 | out: | |
102 | for (i = 0; i < nr; i++) | |
103 | free((void *)desc[i].buffer); | |
104 | return ret; | |
0e5a7faa CR |
105 | } |
106 | ||
107 | static void print_new_head_line(struct commit *commit) | |
108 | { | |
2efb3b06 | 109 | const char *hex, *body; |
b000c59b | 110 | const char *msg; |
0e5a7faa | 111 | |
ed1c9977 | 112 | hex = find_unique_abbrev(commit->object.oid.hash, DEFAULT_ABBREV); |
b50a64e8 | 113 | printf(_("HEAD is now at %s"), hex); |
ecaee805 AS |
114 | msg = logmsg_reencode(commit, NULL, get_log_output_encoding()); |
115 | body = strstr(msg, "\n\n"); | |
0e5a7faa CR |
116 | if (body) { |
117 | const char *eol; | |
118 | size_t len; | |
054a5aee | 119 | body = skip_blank_lines(body + 2); |
0e5a7faa CR |
120 | eol = strchr(body, '\n'); |
121 | len = eol ? eol - body : strlen(body); | |
122 | printf(" %.*s\n", (int) len, body); | |
123 | } | |
124 | else | |
125 | printf("\n"); | |
b66103c3 | 126 | unuse_commit_buffer(commit, msg); |
0e5a7faa CR |
127 | } |
128 | ||
0e5a7faa CR |
129 | static void update_index_from_diff(struct diff_queue_struct *q, |
130 | struct diff_options *opt, void *data) | |
131 | { | |
132 | int i; | |
b4b313f9 | 133 | int intent_to_add = *(int *)data; |
0e5a7faa CR |
134 | |
135 | for (i = 0; i < q->nr; i++) { | |
136 | struct diff_filespec *one = q->queue[i]->one; | |
a0d12c44 | 137 | int is_missing = !(one->mode && !is_null_oid(&one->oid)); |
b4b313f9 NTND |
138 | struct cache_entry *ce; |
139 | ||
140 | if (is_missing && !intent_to_add) { | |
0e5a7faa | 141 | remove_file_from_cache(one->path); |
b4b313f9 NTND |
142 | continue; |
143 | } | |
144 | ||
a0d12c44 | 145 | ce = make_cache_entry(one->mode, one->oid.hash, one->path, |
b4b313f9 NTND |
146 | 0, 0); |
147 | if (!ce) | |
148 | die(_("make_cache_entry failed for path '%s'"), | |
149 | one->path); | |
150 | if (is_missing) { | |
151 | ce->ce_flags |= CE_INTENT_TO_ADD; | |
152 | set_object_name_for_intent_to_add_entry(ce); | |
153 | } | |
154 | add_cache_entry(ce, ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE); | |
0e5a7faa CR |
155 | } |
156 | } | |
157 | ||
bd1928df | 158 | static int read_from_tree(const struct pathspec *pathspec, |
3a5d7c55 | 159 | struct object_id *tree_oid, |
b4b313f9 | 160 | int intent_to_add) |
0e5a7faa | 161 | { |
0e5a7faa CR |
162 | struct diff_options opt; |
163 | ||
164 | memset(&opt, 0, sizeof(opt)); | |
bd1928df | 165 | copy_pathspec(&opt.pathspec, pathspec); |
0e5a7faa CR |
166 | opt.output_format = DIFF_FORMAT_CALLBACK; |
167 | opt.format_callback = update_index_from_diff; | |
b4b313f9 | 168 | opt.format_callback_data = &intent_to_add; |
55568086 | 169 | opt.flags |= DIFF_OPT_OVERRIDE_SUBMODULE_CONFIG; |
0e5a7faa | 170 | |
944cffbd | 171 | if (do_diff_cache(tree_oid, &opt)) |
0e5a7faa CR |
172 | return 1; |
173 | diffcore_std(&opt); | |
174 | diff_flush(&opt); | |
ed6e8038 | 175 | clear_pathspec(&opt.pathspec); |
2e7a9785 | 176 | |
bf883f30 | 177 | return 0; |
0e5a7faa CR |
178 | } |
179 | ||
d04520e3 JK |
180 | static void set_reflog_message(struct strbuf *sb, const char *action, |
181 | const char *rev) | |
0e5a7faa | 182 | { |
0e5a7faa | 183 | const char *rla = getenv("GIT_REFLOG_ACTION"); |
d04520e3 JK |
184 | |
185 | strbuf_reset(sb); | |
186 | if (rla) | |
187 | strbuf_addf(sb, "%s: %s", rla, action); | |
188 | else if (rev) | |
189 | strbuf_addf(sb, "reset: moving to %s", rev); | |
190 | else | |
191 | strbuf_addf(sb, "reset: %s", action); | |
0e5a7faa CR |
192 | } |
193 | ||
812d2a3d CC |
194 | static void die_if_unmerged_cache(int reset_type) |
195 | { | |
2c63d6eb | 196 | if (is_merge() || unmerged_cache()) |
8b2a57b6 ÆAB |
197 | die(_("Cannot do a %s reset in the middle of a merge."), |
198 | _(reset_type_names[reset_type])); | |
812d2a3d CC |
199 | |
200 | } | |
201 | ||
f8144c9f NTND |
202 | static void parse_args(struct pathspec *pathspec, |
203 | const char **argv, const char *prefix, | |
204 | int patch_mode, | |
205 | const char **rev_ret) | |
0e5a7faa | 206 | { |
0e5a7faa | 207 | const char *rev = "HEAD"; |
3a5d7c55 | 208 | struct object_id unused; |
dfc8f39e JH |
209 | /* |
210 | * Possible arguments are: | |
211 | * | |
2f328c3d MZ |
212 | * git reset [-opts] [<rev>] |
213 | * git reset [-opts] <tree> [<paths>...] | |
214 | * git reset [-opts] <tree> -- [<paths>...] | |
215 | * git reset [-opts] -- [<paths>...] | |
dfc8f39e JH |
216 | * git reset [-opts] <paths>... |
217 | * | |
dca48cf5 | 218 | * At this point, argv points immediately after [-opts]. |
dfc8f39e JH |
219 | */ |
220 | ||
dca48cf5 MZ |
221 | if (argv[0]) { |
222 | if (!strcmp(argv[0], "--")) { | |
223 | argv++; /* reset to HEAD, possibly with paths */ | |
224 | } else if (argv[1] && !strcmp(argv[1], "--")) { | |
225 | rev = argv[0]; | |
226 | argv += 2; | |
dfc8f39e JH |
227 | } |
228 | /* | |
dca48cf5 | 229 | * Otherwise, argv[0] could be either <rev> or <paths> and |
2f328c3d MZ |
230 | * has to be unambiguous. If there is a single argument, it |
231 | * can not be a tree | |
dfc8f39e | 232 | */ |
e82caf38 | 233 | else if ((!argv[1] && !get_oid_committish(argv[0], &unused)) || |
234 | (argv[1] && !get_oid_treeish(argv[0], &unused))) { | |
dfc8f39e | 235 | /* |
2f328c3d | 236 | * Ok, argv[0] looks like a commit/tree; it should not |
dfc8f39e JH |
237 | * be a filename. |
238 | */ | |
dca48cf5 MZ |
239 | verify_non_filename(prefix, argv[0]); |
240 | rev = *argv++; | |
dfc8f39e JH |
241 | } else { |
242 | /* Otherwise we treat this as a filename */ | |
dca48cf5 | 243 | verify_filename(prefix, argv[0], 1); |
dfc8f39e JH |
244 | } |
245 | } | |
39ea722d | 246 | *rev_ret = rev; |
2c63d6eb JK |
247 | |
248 | if (read_cache() < 0) | |
249 | die(_("index file corrupt")); | |
250 | ||
480ca644 NTND |
251 | parse_pathspec(pathspec, 0, |
252 | PATHSPEC_PREFER_FULL | | |
253 | (patch_mode ? PATHSPEC_PREFIX_ORIGIN : 0), | |
f8144c9f | 254 | prefix, argv); |
39ea722d MZ |
255 | } |
256 | ||
3a5d7c55 | 257 | static int reset_refs(const char *rev, const struct object_id *oid) |
7bca0e45 MZ |
258 | { |
259 | int update_ref_status; | |
260 | struct strbuf msg = STRBUF_INIT; | |
3a5d7c55 | 261 | struct object_id *orig = NULL, oid_orig, |
262 | *old_orig = NULL, oid_old_orig; | |
7bca0e45 | 263 | |
3a5d7c55 | 264 | if (!get_oid("ORIG_HEAD", &oid_old_orig)) |
265 | old_orig = &oid_old_orig; | |
266 | if (!get_oid("HEAD", &oid_orig)) { | |
267 | orig = &oid_orig; | |
7bca0e45 | 268 | set_reflog_message(&msg, "updating ORIG_HEAD", NULL); |
ae077771 | 269 | update_ref(msg.buf, "ORIG_HEAD", orig, old_orig, 0, |
f4124112 | 270 | UPDATE_REFS_MSG_ON_ERR); |
7bca0e45 | 271 | } else if (old_orig) |
2616a5e5 | 272 | delete_ref(NULL, "ORIG_HEAD", old_orig, 0); |
7bca0e45 | 273 | set_reflog_message(&msg, "updating HEAD", rev); |
ae077771 | 274 | update_ref_status = update_ref(msg.buf, "HEAD", oid, orig, 0, |
f4124112 | 275 | UPDATE_REFS_MSG_ON_ERR); |
7bca0e45 MZ |
276 | strbuf_release(&msg); |
277 | return update_ref_status; | |
278 | } | |
279 | ||
046b4823 SB |
280 | static int git_reset_config(const char *var, const char *value, void *cb) |
281 | { | |
282 | if (!strcmp(var, "submodule.recurse")) | |
283 | return git_default_submodule_config(var, value, cb); | |
284 | ||
285 | return git_default_config(var, value, cb); | |
286 | } | |
287 | ||
39ea722d MZ |
288 | int cmd_reset(int argc, const char **argv, const char *prefix) |
289 | { | |
290 | int reset_type = NONE, update_ref_status = 0, quiet = 0; | |
166ec2e9 | 291 | int patch_mode = 0, unborn; |
39ea722d | 292 | const char *rev; |
f2fd0760 | 293 | struct object_id oid; |
f8144c9f | 294 | struct pathspec pathspec; |
b4b313f9 | 295 | int intent_to_add = 0; |
39ea722d MZ |
296 | const struct option options[] = { |
297 | OPT__QUIET(&quiet, N_("be quiet, only report errors")), | |
298 | OPT_SET_INT(0, "mixed", &reset_type, | |
299 | N_("reset HEAD and index"), MIXED), | |
300 | OPT_SET_INT(0, "soft", &reset_type, N_("reset only HEAD"), SOFT), | |
301 | OPT_SET_INT(0, "hard", &reset_type, | |
302 | N_("reset HEAD, index and working tree"), HARD), | |
303 | OPT_SET_INT(0, "merge", &reset_type, | |
304 | N_("reset HEAD, index and working tree"), MERGE), | |
305 | OPT_SET_INT(0, "keep", &reset_type, | |
306 | N_("reset HEAD but keep local changes"), KEEP), | |
58b75bd6 | 307 | { OPTION_CALLBACK, 0, "recurse-submodules", NULL, |
35b96d1d | 308 | "reset", "control recursive updating of submodules", |
d7a3803f | 309 | PARSE_OPT_OPTARG, option_parse_recurse_submodules_worktree_updater }, |
d5d09d47 | 310 | OPT_BOOL('p', "patch", &patch_mode, N_("select hunks interactively")), |
b4b313f9 NTND |
311 | OPT_BOOL('N', "intent-to-add", &intent_to_add, |
312 | N_("record only the fact that removed paths will be added later")), | |
39ea722d MZ |
313 | OPT_END() |
314 | }; | |
315 | ||
046b4823 | 316 | git_config(git_reset_config, NULL); |
39ea722d MZ |
317 | |
318 | argc = parse_options(argc, argv, prefix, options, git_reset_usage, | |
319 | PARSE_OPT_KEEP_DASHDASH); | |
f8144c9f | 320 | parse_args(&pathspec, argv, prefix, patch_mode, &rev); |
0e5a7faa | 321 | |
e82caf38 | 322 | unborn = !strcmp(rev, "HEAD") && get_oid("HEAD", &oid); |
166ec2e9 MZ |
323 | if (unborn) { |
324 | /* reset on unborn branch: treat as reset to empty tree */ | |
f2fd0760 | 325 | hashcpy(oid.hash, EMPTY_TREE_SHA1_BIN); |
f8144c9f | 326 | } else if (!pathspec.nr) { |
2f328c3d | 327 | struct commit *commit; |
e82caf38 | 328 | if (get_oid_committish(rev, &oid)) |
2f328c3d | 329 | die(_("Failed to resolve '%s' as a valid revision."), rev); |
bc83266a | 330 | commit = lookup_commit_reference(&oid); |
2f328c3d MZ |
331 | if (!commit) |
332 | die(_("Could not parse object '%s'."), rev); | |
f2fd0760 | 333 | oidcpy(&oid, &commit->object.oid); |
2f328c3d MZ |
334 | } else { |
335 | struct tree *tree; | |
e82caf38 | 336 | if (get_oid_treeish(rev, &oid)) |
2f328c3d | 337 | die(_("Failed to resolve '%s' as a valid tree."), rev); |
a9dbc179 | 338 | tree = parse_tree_indirect(&oid); |
2f328c3d MZ |
339 | if (!tree) |
340 | die(_("Could not parse object '%s'."), rev); | |
f2fd0760 | 341 | oidcpy(&oid, &tree->object.oid); |
2f328c3d | 342 | } |
0e5a7faa | 343 | |
d002ef4d TR |
344 | if (patch_mode) { |
345 | if (reset_type != NONE) | |
b50a64e8 | 346 | die(_("--patch is incompatible with --{hard,mixed,soft}")); |
b3e9ce13 | 347 | return run_add_interactive(rev, "--patch=reset", &pathspec); |
d002ef4d TR |
348 | } |
349 | ||
0e5a7faa CR |
350 | /* git reset tree [--] paths... can be used to |
351 | * load chosen paths from the tree into the index without | |
352 | * affecting the working tree nor HEAD. */ | |
f8144c9f | 353 | if (pathspec.nr) { |
0e5a7faa | 354 | if (reset_type == MIXED) |
b50a64e8 | 355 | warning(_("--mixed with paths is deprecated; use 'git reset -- <paths>' instead.")); |
0e5a7faa | 356 | else if (reset_type != NONE) |
8b2a57b6 ÆAB |
357 | die(_("Cannot do %s reset with paths."), |
358 | _(reset_type_names[reset_type])); | |
0e5a7faa CR |
359 | } |
360 | if (reset_type == NONE) | |
361 | reset_type = MIXED; /* by default */ | |
362 | ||
b7756d41 | 363 | if (reset_type != SOFT && (reset_type != MIXED || get_git_work_tree())) |
cd0f0f68 | 364 | setup_work_tree(); |
49b9362f | 365 | |
2b06b0a0 | 366 | if (reset_type == MIXED && is_bare_repository()) |
8b2a57b6 ÆAB |
367 | die(_("%s reset is not allowed in a bare repository"), |
368 | _(reset_type_names[reset_type])); | |
2b06b0a0 | 369 | |
b4b313f9 NTND |
370 | if (intent_to_add && reset_type != MIXED) |
371 | die(_("-N can only be used with --mixed")); | |
372 | ||
0e5a7faa CR |
373 | /* Soft reset does not touch the index file nor the working tree |
374 | * at all, but requires them in a good order. Other resets reset | |
375 | * the index file to the tree object we are switching to. */ | |
352f58a5 | 376 | if (reset_type == SOFT || reset_type == KEEP) |
812d2a3d | 377 | die_if_unmerged_cache(reset_type); |
352f58a5 MZ |
378 | |
379 | if (reset_type != SOFT) { | |
bfffb48c JK |
380 | struct lock_file lock = LOCK_INIT; |
381 | hold_locked_index(&lock, LOCK_DIE_ON_ERROR); | |
3fde386a | 382 | if (reset_type == MIXED) { |
f38798f4 | 383 | int flags = quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN; |
3a5d7c55 | 384 | if (read_from_tree(&pathspec, &oid, intent_to_add)) |
3bbf2f20 | 385 | return 1; |
b7756d41 NTND |
386 | if (get_git_work_tree()) |
387 | refresh_index(&the_index, flags, NULL, NULL, | |
388 | _("Unstaged changes after reset:")); | |
3bbf2f20 | 389 | } else { |
3a5d7c55 | 390 | int err = reset_index(&oid, reset_type, quiet); |
3bbf2f20 | 391 | if (reset_type == KEEP && !err) |
3a5d7c55 | 392 | err = reset_index(&oid, MIXED, quiet); |
3bbf2f20 MZ |
393 | if (err) |
394 | die(_("Could not reset index file to revision '%s'."), rev); | |
395 | } | |
bc41bf42 | 396 | |
bfffb48c | 397 | if (write_locked_index(&the_index, &lock, COMMIT_LOCK)) |
1ca38f85 | 398 | die(_("Could not write new index file.")); |
0e5a7faa | 399 | } |
0e5a7faa | 400 | |
f8144c9f | 401 | if (!pathspec.nr && !unborn) { |
3bbf2f20 MZ |
402 | /* Any resets without paths update HEAD to the head being |
403 | * switched to, saving the previous head in ORIG_HEAD before. */ | |
3a5d7c55 | 404 | update_ref_status = reset_refs(rev, &oid); |
0e5a7faa | 405 | |
3bbf2f20 | 406 | if (reset_type == HARD && !update_ref_status && !quiet) |
bc83266a | 407 | print_new_head_line(lookup_commit_reference(&oid)); |
3bbf2f20 | 408 | } |
f8144c9f | 409 | if (!pathspec.nr) |
166ec2e9 | 410 | remove_branch_state(); |
0e5a7faa | 411 | |
0e5a7faa CR |
412 | return update_ref_status; |
413 | } |