| /* |
| * "git reset" builtin command |
| * |
| * Copyright (c) 2007 Carlos Rica |
| * |
| * Based on git-reset.sh, which is |
| * |
| * Copyright (c) 2005, 2006 Linus Torvalds and Junio C Hamano |
| */ |
| #define USE_THE_INDEX_COMPATIBILITY_MACROS |
| #include "builtin.h" |
| #include "config.h" |
| #include "lockfile.h" |
| #include "tag.h" |
| #include "object.h" |
| #include "pretty.h" |
| #include "run-command.h" |
| #include "refs.h" |
| #include "diff.h" |
| #include "diffcore.h" |
| #include "tree.h" |
| #include "branch.h" |
| #include "parse-options.h" |
| #include "unpack-trees.h" |
| #include "cache-tree.h" |
| #include "submodule.h" |
| #include "submodule-config.h" |
| |
| #define REFRESH_INDEX_DELAY_WARNING_IN_MS (2 * 1000) |
| |
| static const char * const git_reset_usage[] = { |
| N_("git reset [--mixed | --soft | --hard | --merge | --keep] [-q] [<commit>]"), |
| N_("git reset [-q] [<tree-ish>] [--] <paths>..."), |
| N_("git reset --patch [<tree-ish>] [--] [<paths>...]"), |
| NULL |
| }; |
| |
| enum reset_type { MIXED, SOFT, HARD, MERGE, KEEP, NONE }; |
| static const char *reset_type_names[] = { |
| N_("mixed"), N_("soft"), N_("hard"), N_("merge"), N_("keep"), NULL |
| }; |
| |
| static inline int is_merge(void) |
| { |
| return !access(git_path_merge_head(the_repository), F_OK); |
| } |
| |
| static int reset_index(const struct object_id *oid, int reset_type, int quiet) |
| { |
| int i, nr = 0; |
| struct tree_desc desc[2]; |
| struct tree *tree; |
| struct unpack_trees_options opts; |
| int ret = -1; |
| |
| memset(&opts, 0, sizeof(opts)); |
| opts.head_idx = 1; |
| opts.src_index = &the_index; |
| opts.dst_index = &the_index; |
| opts.fn = oneway_merge; |
| opts.merge = 1; |
| if (!quiet) |
| opts.verbose_update = 1; |
| switch (reset_type) { |
| case KEEP: |
| case MERGE: |
| opts.update = 1; |
| break; |
| case HARD: |
| opts.update = 1; |
| /* fallthrough */ |
| default: |
| opts.reset = 1; |
| } |
| |
| read_cache_unmerged(); |
| |
| if (reset_type == KEEP) { |
| struct object_id head_oid; |
| if (get_oid("HEAD", &head_oid)) |
| return error(_("You do not have a valid HEAD.")); |
| if (!fill_tree_descriptor(desc + nr, &head_oid)) |
| return error(_("Failed to find tree of HEAD.")); |
| nr++; |
| opts.fn = twoway_merge; |
| } |
| |
| if (!fill_tree_descriptor(desc + nr, oid)) { |
| error(_("Failed to find tree of %s."), oid_to_hex(oid)); |
| goto out; |
| } |
| nr++; |
| |
| if (unpack_trees(nr, desc, &opts)) |
| goto out; |
| |
| if (reset_type == MIXED || reset_type == HARD) { |
| tree = parse_tree_indirect(oid); |
| prime_cache_tree(the_repository, the_repository->index, tree); |
| } |
| |
| ret = 0; |
| |
| out: |
| for (i = 0; i < nr; i++) |
| free((void *)desc[i].buffer); |
| return ret; |
| } |
| |
| static void print_new_head_line(struct commit *commit) |
| { |
| struct strbuf buf = STRBUF_INIT; |
| |
| printf(_("HEAD is now at %s"), |
| find_unique_abbrev(&commit->object.oid, DEFAULT_ABBREV)); |
| |
| pp_commit_easy(CMIT_FMT_ONELINE, commit, &buf); |
| if (buf.len > 0) |
| printf(" %s", buf.buf); |
| putchar('\n'); |
| strbuf_release(&buf); |
| } |
| |
| static void update_index_from_diff(struct diff_queue_struct *q, |
| struct diff_options *opt, void *data) |
| { |
| int i; |
| int intent_to_add = *(int *)data; |
| |
| for (i = 0; i < q->nr; i++) { |
| struct diff_filespec *one = q->queue[i]->one; |
| int is_missing = !(one->mode && !is_null_oid(&one->oid)); |
| struct cache_entry *ce; |
| |
| if (is_missing && !intent_to_add) { |
| remove_file_from_cache(one->path); |
| continue; |
| } |
| |
| ce = make_cache_entry(&the_index, one->mode, &one->oid, one->path, |
| 0, 0); |
| if (!ce) |
| die(_("make_cache_entry failed for path '%s'"), |
| one->path); |
| if (is_missing) { |
| ce->ce_flags |= CE_INTENT_TO_ADD; |
| set_object_name_for_intent_to_add_entry(ce); |
| } |
| add_cache_entry(ce, ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE); |
| } |
| } |
| |
| static int read_from_tree(const struct pathspec *pathspec, |
| struct object_id *tree_oid, |
| int intent_to_add) |
| { |
| struct diff_options opt; |
| |
| memset(&opt, 0, sizeof(opt)); |
| copy_pathspec(&opt.pathspec, pathspec); |
| opt.output_format = DIFF_FORMAT_CALLBACK; |
| opt.format_callback = update_index_from_diff; |
| opt.format_callback_data = &intent_to_add; |
| opt.flags.override_submodule_config = 1; |
| opt.repo = the_repository; |
| |
| if (do_diff_cache(tree_oid, &opt)) |
| return 1; |
| diffcore_std(&opt); |
| diff_flush(&opt); |
| clear_pathspec(&opt.pathspec); |
| |
| return 0; |
| } |
| |
| static void set_reflog_message(struct strbuf *sb, const char *action, |
| const char *rev) |
| { |
| const char *rla = getenv("GIT_REFLOG_ACTION"); |
| |
| strbuf_reset(sb); |
| if (rla) |
| strbuf_addf(sb, "%s: %s", rla, action); |
| else if (rev) |
| strbuf_addf(sb, "reset: moving to %s", rev); |
| else |
| strbuf_addf(sb, "reset: %s", action); |
| } |
| |
| static void die_if_unmerged_cache(int reset_type) |
| { |
| if (is_merge() || unmerged_cache()) |
| die(_("Cannot do a %s reset in the middle of a merge."), |
| _(reset_type_names[reset_type])); |
| |
| } |
| |
| static void parse_args(struct pathspec *pathspec, |
| const char **argv, const char *prefix, |
| int patch_mode, |
| const char **rev_ret) |
| { |
| const char *rev = "HEAD"; |
| struct object_id unused; |
| /* |
| * Possible arguments are: |
| * |
| * git reset [-opts] [<rev>] |
| * git reset [-opts] <tree> [<paths>...] |
| * git reset [-opts] <tree> -- [<paths>...] |
| * git reset [-opts] -- [<paths>...] |
| * git reset [-opts] <paths>... |
| * |
| * At this point, argv points immediately after [-opts]. |
| */ |
| |
| if (argv[0]) { |
| if (!strcmp(argv[0], "--")) { |
| argv++; /* reset to HEAD, possibly with paths */ |
| } else if (argv[1] && !strcmp(argv[1], "--")) { |
| rev = argv[0]; |
| argv += 2; |
| } |
| /* |
| * Otherwise, argv[0] could be either <rev> or <paths> and |
| * has to be unambiguous. If there is a single argument, it |
| * can not be a tree |
| */ |
| else if ((!argv[1] && !get_oid_committish(argv[0], &unused)) || |
| (argv[1] && !get_oid_treeish(argv[0], &unused))) { |
| /* |
| * Ok, argv[0] looks like a commit/tree; it should not |
| * be a filename. |
| */ |
| verify_non_filename(prefix, argv[0]); |
| rev = *argv++; |
| } else { |
| /* Otherwise we treat this as a filename */ |
| verify_filename(prefix, argv[0], 1); |
| } |
| } |
| *rev_ret = rev; |
| |
| if (read_cache() < 0) |
| die(_("index file corrupt")); |
| |
| parse_pathspec(pathspec, 0, |
| PATHSPEC_PREFER_FULL | |
| (patch_mode ? PATHSPEC_PREFIX_ORIGIN : 0), |
| prefix, argv); |
| } |
| |
| static int reset_refs(const char *rev, const struct object_id *oid) |
| { |
| int update_ref_status; |
| struct strbuf msg = STRBUF_INIT; |
| struct object_id *orig = NULL, oid_orig, |
| *old_orig = NULL, oid_old_orig; |
| |
| if (!get_oid("ORIG_HEAD", &oid_old_orig)) |
| old_orig = &oid_old_orig; |
| if (!get_oid("HEAD", &oid_orig)) { |
| orig = &oid_orig; |
| set_reflog_message(&msg, "updating ORIG_HEAD", NULL); |
| update_ref(msg.buf, "ORIG_HEAD", orig, old_orig, 0, |
| UPDATE_REFS_MSG_ON_ERR); |
| } else if (old_orig) |
| delete_ref(NULL, "ORIG_HEAD", old_orig, 0); |
| set_reflog_message(&msg, "updating HEAD", rev); |
| update_ref_status = update_ref(msg.buf, "HEAD", oid, orig, 0, |
| UPDATE_REFS_MSG_ON_ERR); |
| strbuf_release(&msg); |
| return update_ref_status; |
| } |
| |
| static int git_reset_config(const char *var, const char *value, void *cb) |
| { |
| if (!strcmp(var, "submodule.recurse")) |
| return git_default_submodule_config(var, value, cb); |
| |
| return git_default_config(var, value, cb); |
| } |
| |
| int cmd_reset(int argc, const char **argv, const char *prefix) |
| { |
| int reset_type = NONE, update_ref_status = 0, quiet = 0; |
| int patch_mode = 0, unborn; |
| const char *rev; |
| struct object_id oid; |
| struct pathspec pathspec; |
| int intent_to_add = 0; |
| const struct option options[] = { |
| OPT__QUIET(&quiet, N_("be quiet, only report errors")), |
| OPT_SET_INT(0, "mixed", &reset_type, |
| N_("reset HEAD and index"), MIXED), |
| OPT_SET_INT(0, "soft", &reset_type, N_("reset only HEAD"), SOFT), |
| OPT_SET_INT(0, "hard", &reset_type, |
| N_("reset HEAD, index and working tree"), HARD), |
| OPT_SET_INT(0, "merge", &reset_type, |
| N_("reset HEAD, index and working tree"), MERGE), |
| OPT_SET_INT(0, "keep", &reset_type, |
| N_("reset HEAD but keep local changes"), KEEP), |
| { OPTION_CALLBACK, 0, "recurse-submodules", NULL, |
| "reset", "control recursive updating of submodules", |
| PARSE_OPT_OPTARG, option_parse_recurse_submodules_worktree_updater }, |
| OPT_BOOL('p', "patch", &patch_mode, N_("select hunks interactively")), |
| OPT_BOOL('N', "intent-to-add", &intent_to_add, |
| N_("record only the fact that removed paths will be added later")), |
| OPT_END() |
| }; |
| |
| git_config(git_reset_config, NULL); |
| git_config_get_bool("reset.quiet", &quiet); |
| |
| argc = parse_options(argc, argv, prefix, options, git_reset_usage, |
| PARSE_OPT_KEEP_DASHDASH); |
| parse_args(&pathspec, argv, prefix, patch_mode, &rev); |
| |
| unborn = !strcmp(rev, "HEAD") && get_oid("HEAD", &oid); |
| if (unborn) { |
| /* reset on unborn branch: treat as reset to empty tree */ |
| oidcpy(&oid, the_hash_algo->empty_tree); |
| } else if (!pathspec.nr) { |
| struct commit *commit; |
| if (get_oid_committish(rev, &oid)) |
| die(_("Failed to resolve '%s' as a valid revision."), rev); |
| commit = lookup_commit_reference(the_repository, &oid); |
| if (!commit) |
| die(_("Could not parse object '%s'."), rev); |
| oidcpy(&oid, &commit->object.oid); |
| } else { |
| struct tree *tree; |
| if (get_oid_treeish(rev, &oid)) |
| die(_("Failed to resolve '%s' as a valid tree."), rev); |
| tree = parse_tree_indirect(&oid); |
| if (!tree) |
| die(_("Could not parse object '%s'."), rev); |
| oidcpy(&oid, &tree->object.oid); |
| } |
| |
| if (patch_mode) { |
| if (reset_type != NONE) |
| die(_("--patch is incompatible with --{hard,mixed,soft}")); |
| trace2_cmd_mode("patch-interactive"); |
| return run_add_interactive(rev, "--patch=reset", &pathspec); |
| } |
| |
| /* git reset tree [--] paths... can be used to |
| * load chosen paths from the tree into the index without |
| * affecting the working tree nor HEAD. */ |
| if (pathspec.nr) { |
| if (reset_type == MIXED) |
| warning(_("--mixed with paths is deprecated; use 'git reset -- <paths>' instead.")); |
| else if (reset_type != NONE) |
| die(_("Cannot do %s reset with paths."), |
| _(reset_type_names[reset_type])); |
| } |
| if (reset_type == NONE) |
| reset_type = MIXED; /* by default */ |
| |
| if (pathspec.nr) |
| trace2_cmd_mode("path"); |
| else |
| trace2_cmd_mode(reset_type_names[reset_type]); |
| |
| if (reset_type != SOFT && (reset_type != MIXED || get_git_work_tree())) |
| setup_work_tree(); |
| |
| if (reset_type == MIXED && is_bare_repository()) |
| die(_("%s reset is not allowed in a bare repository"), |
| _(reset_type_names[reset_type])); |
| |
| if (intent_to_add && reset_type != MIXED) |
| die(_("-N can only be used with --mixed")); |
| |
| /* Soft reset does not touch the index file nor the working tree |
| * at all, but requires them in a good order. Other resets reset |
| * the index file to the tree object we are switching to. */ |
| if (reset_type == SOFT || reset_type == KEEP) |
| die_if_unmerged_cache(reset_type); |
| |
| if (reset_type != SOFT) { |
| struct lock_file lock = LOCK_INIT; |
| hold_locked_index(&lock, LOCK_DIE_ON_ERROR); |
| if (reset_type == MIXED) { |
| int flags = quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN; |
| if (read_from_tree(&pathspec, &oid, intent_to_add)) |
| return 1; |
| the_index.updated_skipworktree = 1; |
| if (!quiet && get_git_work_tree()) { |
| uint64_t t_begin, t_delta_in_ms; |
| |
| t_begin = getnanotime(); |
| refresh_index(&the_index, flags, NULL, NULL, |
| _("Unstaged changes after reset:")); |
| t_delta_in_ms = (getnanotime() - t_begin) / 1000000; |
| if (advice_reset_quiet_warning && t_delta_in_ms > REFRESH_INDEX_DELAY_WARNING_IN_MS) { |
| printf(_("\nIt took %.2f seconds to enumerate unstaged changes after reset. You can\n" |
| "use '--quiet' to avoid this. Set the config setting reset.quiet to true\n" |
| "to make this the default.\n"), t_delta_in_ms / 1000.0); |
| } |
| } |
| } else { |
| int err = reset_index(&oid, reset_type, quiet); |
| if (reset_type == KEEP && !err) |
| err = reset_index(&oid, MIXED, quiet); |
| if (err) |
| die(_("Could not reset index file to revision '%s'."), rev); |
| } |
| |
| if (write_locked_index(&the_index, &lock, COMMIT_LOCK)) |
| die(_("Could not write new index file.")); |
| } |
| |
| if (!pathspec.nr && !unborn) { |
| /* Any resets without paths update HEAD to the head being |
| * switched to, saving the previous head in ORIG_HEAD before. */ |
| update_ref_status = reset_refs(rev, &oid); |
| |
| if (reset_type == HARD && !update_ref_status && !quiet) |
| print_new_head_line(lookup_commit_reference(the_repository, &oid)); |
| } |
| if (!pathspec.nr) |
| remove_branch_state(the_repository); |
| |
| return update_ref_status; |
| } |