Ejemplo n.º 1
0
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;
	unsigned char sha1[20];
	const char **pathspec = NULL;
	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),
		OPT_BOOL('p', "patch", &patch_mode, N_("select hunks interactively")),
		OPT_END()
	};

	git_config(git_default_config, NULL);

	argc = parse_options(argc, argv, prefix, options, git_reset_usage,
						PARSE_OPT_KEEP_DASHDASH);
	pathspec = parse_args(argv, prefix, &rev);

	unborn = !strcmp(rev, "HEAD") && get_sha1("HEAD", sha1);
	if (unborn) {
		/* reset on unborn branch: treat as reset to empty tree */
		hashcpy(sha1, EMPTY_TREE_SHA1_BIN);
	} else if (!pathspec) {
		struct commit *commit;
		if (get_sha1_committish(rev, sha1))
			die(_("Failed to resolve '%s' as a valid revision."), rev);
		commit = lookup_commit_reference(sha1);
		if (!commit)
			die(_("Could not parse object '%s'."), rev);
		hashcpy(sha1, commit->object.sha1);
	} else {
		struct tree *tree;
		if (get_sha1_treeish(rev, sha1))
			die(_("Failed to resolve '%s' as a valid tree."), rev);
		tree = parse_tree_indirect(sha1);
		if (!tree)
			die(_("Could not parse object '%s'."), rev);
		hashcpy(sha1, tree->object.sha1);
	}

	if (patch_mode) {
		if (reset_type != NONE)
			die(_("--patch is incompatible with --{hard,mixed,soft}"));
		return run_add_interactive(sha1_to_hex(sha1), "--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) {
		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 (reset_type != SOFT && reset_type != MIXED)
		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]));

	/* 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 = xcalloc(1, sizeof(struct lock_file));
		int newfd = hold_locked_index(lock, 1);
		if (reset_type == MIXED) {
			if (read_from_tree(pathspec, sha1))
				return 1;
		} else {
			int err = reset_index(sha1, reset_type, quiet);
			if (reset_type == KEEP && !err)
				err = reset_index(sha1, MIXED, quiet);
			if (err)
				die(_("Could not reset index file to revision '%s'."), rev);
		}

		if (reset_type == MIXED) { /* Report what has not been updated. */
			int flags = quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN;
			refresh_index(&the_index, flags, NULL, NULL,
				      _("Unstaged changes after reset:"));
		}

		if (write_cache(newfd, active_cache, active_nr) ||
		    commit_locked_index(lock))
			die(_("Could not write new index file."));
	}

	if (!pathspec && !unborn) {
		/* Any resets without paths update HEAD to the head being
		 * switched to, saving the previous head in ORIG_HEAD before. */
		update_ref_status = update_refs(rev, sha1);

		if (reset_type == HARD && !update_ref_status && !quiet)
			print_new_head_line(lookup_commit_reference(sha1));
	}
	if (!pathspec)
		remove_branch_state();

	return update_ref_status;
}
Ejemplo n.º 2
0
Archivo: revert.c Proyecto: Nowher2/git
static int run_sequencer(int argc, const char **argv, struct replay_opts *opts)
{
	const char * const * usage_str = revert_or_cherry_pick_usage(opts);
	const char *me = action_name(opts);
	int cmd = 0;
	struct option base_options[] = {
		OPT_CMDMODE(0, "quit", &cmd, N_("end revert or cherry-pick sequence"), 'q'),
		OPT_CMDMODE(0, "continue", &cmd, N_("resume revert or cherry-pick sequence"), 'c'),
		OPT_CMDMODE(0, "abort", &cmd, N_("cancel revert or cherry-pick sequence"), 'a'),
		OPT_BOOL('n', "no-commit", &opts->no_commit, N_("don't automatically commit")),
		OPT_BOOL('e', "edit", &opts->edit, N_("edit the commit message")),
		OPT_NOOP_NOARG('r', NULL),
		OPT_BOOL('s', "signoff", &opts->signoff, N_("add Signed-off-by:")),
		OPT_CALLBACK('m', "mainline", opts, N_("parent-number"),
			     N_("select mainline parent"), option_parse_m),
		OPT_RERERE_AUTOUPDATE(&opts->allow_rerere_auto),
		OPT_STRING(0, "strategy", &opts->strategy, N_("strategy"), N_("merge strategy")),
		OPT_CALLBACK('X', "strategy-option", &opts, N_("option"),
			N_("option for merge strategy"), option_parse_x),
		{ OPTION_STRING, 'S', "gpg-sign", &opts->gpg_sign, N_("key-id"),
		  N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
		OPT_END()
	};
	struct option *options = base_options;

	if (opts->action == REPLAY_PICK) {
		struct option cp_extra[] = {
			OPT_BOOL('x', NULL, &opts->record_origin, N_("append commit name")),
			OPT_BOOL(0, "ff", &opts->allow_ff, N_("allow fast-forward")),
			OPT_BOOL(0, "allow-empty", &opts->allow_empty, N_("preserve initially empty commits")),
			OPT_BOOL(0, "allow-empty-message", &opts->allow_empty_message, N_("allow commits with empty messages")),
			OPT_BOOL(0, "keep-redundant-commits", &opts->keep_redundant_commits, N_("keep redundant, empty commits")),
			OPT_END(),
		};
		options = parse_options_concat(options, cp_extra);
	}

	argc = parse_options(argc, argv, NULL, options, usage_str,
			PARSE_OPT_KEEP_ARGV0 |
			PARSE_OPT_KEEP_UNKNOWN);

	/* implies allow_empty */
	if (opts->keep_redundant_commits)
		opts->allow_empty = 1;

	/* Check for incompatible command line arguments */
	if (cmd) {
		char *this_operation;
		if (cmd == 'q')
			this_operation = "--quit";
		else if (cmd == 'c')
			this_operation = "--continue";
		else {
			assert(cmd == 'a');
			this_operation = "--abort";
		}

		verify_opt_compatible(me, this_operation,
				"--no-commit", opts->no_commit,
				"--signoff", opts->signoff,
				"--mainline", opts->mainline,
				"--strategy", opts->strategy ? 1 : 0,
				"--strategy-option", opts->xopts ? 1 : 0,
				"-x", opts->record_origin,
				"--ff", opts->allow_ff,
				"--rerere-autoupdate", opts->allow_rerere_auto == RERERE_AUTOUPDATE,
				"--no-rerere-autoupdate", opts->allow_rerere_auto == RERERE_NOAUTOUPDATE,
				NULL);
	}

	if (opts->allow_ff)
		verify_opt_compatible(me, "--ff",
				"--signoff", opts->signoff,
				"--no-commit", opts->no_commit,
				"-x", opts->record_origin,
				"--edit", opts->edit,
				NULL);

	if (cmd) {
		opts->revs = NULL;
	} else {
		struct setup_revision_opt s_r_opt;
		opts->revs = xmalloc(sizeof(*opts->revs));
		init_revisions(opts->revs, NULL);
		opts->revs->no_walk = REVISION_WALK_NO_WALK_UNSORTED;
		if (argc < 2)
			usage_with_options(usage_str, options);
		if (!strcmp(argv[1], "-"))
			argv[1] = "@{-1}";
		memset(&s_r_opt, 0, sizeof(s_r_opt));
		s_r_opt.assume_dashdash = 1;
		argc = setup_revisions(argc, argv, opts->revs, &s_r_opt);
	}

	if (argc > 1)
		usage_with_options(usage_str, options);

	/* These option values will be free()d */
	opts->gpg_sign = xstrdup_or_null(opts->gpg_sign);
	opts->strategy = xstrdup_or_null(opts->strategy);

	if (cmd == 'q') {
		int ret = sequencer_remove_state(opts);
		if (!ret)
			remove_branch_state();
		return ret;
	}
	if (cmd == 'c')
		return sequencer_continue(opts);
	if (cmd == 'a')
		return sequencer_rollback(opts);
	return sequencer_pick_revisions(opts);
}
Ejemplo n.º 3
0
int cmd_reset(int argc, const char **argv, const char *prefix)
{
	int i = 0, reset_type = NONE, update_ref_status = 0, quiet = 0;
	const char *rev = "HEAD";
	unsigned char sha1[20], *orig = NULL, sha1_orig[20],
				*old_orig = NULL, sha1_old_orig[20];
	struct commit *commit;
	char *reflog_action, msg[1024];
	const struct option options[] = {
		OPT_SET_INT(0, "mixed", &reset_type,
						"reset HEAD and index", MIXED),
		OPT_SET_INT(0, "soft", &reset_type, "reset only HEAD", SOFT),
		OPT_SET_INT(0, "hard", &reset_type,
				"reset HEAD, index and working tree", HARD),
		OPT_BOOLEAN('q', NULL, &quiet,
				"disable showing new HEAD in hard reset and progress message"),
		OPT_END()
	};

	git_config(git_default_config, NULL);

	argc = parse_options(argc, argv, options, git_reset_usage,
						PARSE_OPT_KEEP_DASHDASH);
	reflog_action = args_to_str(argv);
	setenv("GIT_REFLOG_ACTION", reflog_action, 0);

	/*
	 * Possible arguments are:
	 *
	 * git reset [-opts] <rev> <paths>...
	 * git reset [-opts] <rev> -- <paths>...
	 * git reset [-opts] -- <paths>...
	 * git reset [-opts] <paths>...
	 *
	 * At this point, argv[i] points immediately after [-opts].
	 */

	if (i < argc) {
		if (!strcmp(argv[i], "--")) {
			i++; /* reset to HEAD, possibly with paths */
		} else if (i + 1 < argc && !strcmp(argv[i+1], "--")) {
			rev = argv[i];
			i += 2;
		}
		/*
		 * Otherwise, argv[i] could be either <rev> or <paths> and
		 * has to be unambigous.
		 */
		else if (!get_sha1(argv[i], sha1)) {
			/*
			 * Ok, argv[i] looks like a rev; it should not
			 * be a filename.
			 */
			verify_non_filename(prefix, argv[i]);
			rev = argv[i++];
		} else {
			/* Otherwise we treat this as a filename */
			verify_filename(prefix, argv[i]);
		}
	}

	if (get_sha1(rev, sha1))
		die("Failed to resolve '%s' as a valid ref.", rev);

	commit = lookup_commit_reference(sha1);
	if (!commit)
		die("Could not parse object '%s'.", rev);
	hashcpy(sha1, commit->object.sha1);

	/* 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 (i < argc) {
		if (reset_type == MIXED)
			warning("--mixed option is deprecated with paths.");
		else if (reset_type != NONE)
			die("Cannot do %s reset with paths.",
					reset_type_names[reset_type]);
		return read_from_tree(prefix, argv + i, sha1,
				quiet ? REFRESH_QUIET : REFRESH_SAY_CHANGED);
	}
	if (reset_type == NONE)
		reset_type = MIXED; /* by default */

	if (reset_type == HARD && is_bare_repository())
		die("hard reset makes no sense in a bare repository");

	/* 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) {
		if (is_merge() || read_cache() < 0 || unmerged_cache())
			die("Cannot do a soft reset in the middle of a merge.");
	}
	else if (reset_index_file(sha1, (reset_type == HARD), quiet))
		die("Could not reset index file to revision '%s'.", rev);

	/* Any resets update HEAD to the head being switched to,
	 * saving the previous head in ORIG_HEAD before. */
	if (!get_sha1("ORIG_HEAD", sha1_old_orig))
		old_orig = sha1_old_orig;
	if (!get_sha1("HEAD", sha1_orig)) {
		orig = sha1_orig;
		prepend_reflog_action("updating ORIG_HEAD", msg, sizeof(msg));
		update_ref(msg, "ORIG_HEAD", orig, old_orig, 0, MSG_ON_ERR);
	}
	else if (old_orig)
		delete_ref("ORIG_HEAD", old_orig);
	prepend_reflog_action("updating HEAD", msg, sizeof(msg));
	update_ref_status = update_ref(msg, "HEAD", sha1, orig, 0, MSG_ON_ERR);

	switch (reset_type) {
	case HARD:
		if (!update_ref_status && !quiet)
			print_new_head_line(commit);
		break;
	case SOFT: /* Nothing else to do. */
		break;
	case MIXED: /* Report what has not been updated. */
		update_index_refresh(0, NULL,
				quiet ? REFRESH_QUIET : REFRESH_SAY_CHANGED);
		break;
	}

	remove_branch_state();

	free(reflog_action);

	return update_ref_status;
}
Ejemplo n.º 4
0
static void update_refs_for_switch(const struct checkout_opts *opts,
				   struct branch_info *old_branch_info,
				   struct branch_info *new_branch_info)
{
	struct strbuf msg = STRBUF_INIT;
	const char *old_desc, *reflog_msg;
	if (opts->new_branch) {
		if (opts->new_orphan_branch) {
			char *refname;

			refname = mkpathdup("refs/heads/%s", opts->new_orphan_branch);
			if (opts->new_branch_log &&
			    !should_autocreate_reflog(refname)) {
				int ret;
				struct strbuf err = STRBUF_INIT;

				ret = safe_create_reflog(refname, 1, &err);
				if (ret) {
					fprintf(stderr, _("Can not do reflog for '%s': %s\n"),
						opts->new_orphan_branch, err.buf);
					strbuf_release(&err);
					free(refname);
					return;
				}
				strbuf_release(&err);
			}
			free(refname);
		}
		else
			create_branch(the_repository,
				      opts->new_branch, new_branch_info->name,
				      opts->new_branch_force ? 1 : 0,
				      opts->new_branch_force ? 1 : 0,
				      opts->new_branch_log,
				      opts->quiet,
				      opts->track);
		new_branch_info->name = opts->new_branch;
		setup_branch_path(new_branch_info);
	}

	old_desc = old_branch_info->name;
	if (!old_desc && old_branch_info->commit)
		old_desc = oid_to_hex(&old_branch_info->commit->object.oid);

	reflog_msg = getenv("GIT_REFLOG_ACTION");
	if (!reflog_msg)
		strbuf_addf(&msg, "checkout: moving from %s to %s",
			old_desc ? old_desc : "(invalid)", new_branch_info->name);
	else
		strbuf_insert(&msg, 0, reflog_msg, strlen(reflog_msg));

	if (!strcmp(new_branch_info->name, "HEAD") && !new_branch_info->path && !opts->force_detach) {
		/* Nothing to do. */
	} else if (opts->force_detach || !new_branch_info->path) {	/* No longer on any branch. */
		update_ref(msg.buf, "HEAD", &new_branch_info->commit->object.oid, NULL,
			   REF_NO_DEREF, UPDATE_REFS_DIE_ON_ERR);
		if (!opts->quiet) {
			if (old_branch_info->path &&
			    advice_detached_head && !opts->force_detach)
				detach_advice(new_branch_info->name);
			describe_detached_head(_("HEAD is now at"), new_branch_info->commit);
		}
	} else if (new_branch_info->path) {	/* Switch branches. */
		if (create_symref("HEAD", new_branch_info->path, msg.buf) < 0)
			die(_("unable to update HEAD"));
		if (!opts->quiet) {
			if (old_branch_info->path && !strcmp(new_branch_info->path, old_branch_info->path)) {
				if (opts->new_branch_force)
					fprintf(stderr, _("Reset branch '%s'\n"),
						new_branch_info->name);
				else
					fprintf(stderr, _("Already on '%s'\n"),
						new_branch_info->name);
			} else if (opts->new_branch) {
				if (opts->branch_exists)
					fprintf(stderr, _("Switched to and reset branch '%s'\n"), new_branch_info->name);
				else
					fprintf(stderr, _("Switched to a new branch '%s'\n"), new_branch_info->name);
			} else {
				fprintf(stderr, _("Switched to branch '%s'\n"),
					new_branch_info->name);
			}
		}
		if (old_branch_info->path && old_branch_info->name) {
			if (!ref_exists(old_branch_info->path) && reflog_exists(old_branch_info->path))
				delete_reflog(old_branch_info->path);
		}
	}
	remove_branch_state(the_repository);
	strbuf_release(&msg);
	if (!opts->quiet &&
	    (new_branch_info->path || (!opts->force_detach && !strcmp(new_branch_info->name, "HEAD"))))
		report_tracking(new_branch_info);
}
Ejemplo n.º 5
0
int cmd_reset(int argc, const char **argv, const char *prefix)
{
	int i = 0, reset_type = NONE, update_ref_status = 0, quiet = 0;
	int patch_mode = 0;
	const char *rev = "HEAD";
	unsigned char sha1[20], *orig = NULL, sha1_orig[20],
				*old_orig = NULL, sha1_old_orig[20];
	struct commit *commit;
	struct strbuf msg = STRBUF_INIT;
	const struct option options[] = {
		OPT__QUIET(&quiet, "be quiet, only report errors"),
		OPT_SET_INT(0, "mixed", &reset_type,
						"reset HEAD and index", MIXED),
		OPT_SET_INT(0, "soft", &reset_type, "reset only HEAD", SOFT),
		OPT_SET_INT(0, "hard", &reset_type,
				"reset HEAD, index and working tree", HARD),
		OPT_SET_INT(0, "merge", &reset_type,
				"reset HEAD, index and working tree", MERGE),
		OPT_SET_INT(0, "keep", &reset_type,
				"reset HEAD but keep local changes", KEEP),
		OPT_BOOLEAN('p', "patch", &patch_mode, "select hunks interactively"),
		OPT_END()
	};

	git_config(git_default_config, NULL);

	argc = parse_options(argc, argv, prefix, options, git_reset_usage,
						PARSE_OPT_KEEP_DASHDASH);

	/*
	 * Possible arguments are:
	 *
	 * git reset [-opts] <rev> <paths>...
	 * git reset [-opts] <rev> -- <paths>...
	 * git reset [-opts] -- <paths>...
	 * git reset [-opts] <paths>...
	 *
	 * At this point, argv[i] points immediately after [-opts].
	 */

	if (i < argc) {
		if (!strcmp(argv[i], "--")) {
			i++; /* reset to HEAD, possibly with paths */
		} else if (i + 1 < argc && !strcmp(argv[i+1], "--")) {
			rev = argv[i];
			i += 2;
		}
		/*
		 * Otherwise, argv[i] could be either <rev> or <paths> and
		 * has to be unambiguous.
		 */
		else if (!get_sha1(argv[i], sha1)) {
			/*
			 * Ok, argv[i] looks like a rev; it should not
			 * be a filename.
			 */
			verify_non_filename(prefix, argv[i]);
			rev = argv[i++];
		} else {
			/* Otherwise we treat this as a filename */
			verify_filename(prefix, argv[i]);
		}
	}

	if (get_sha1(rev, sha1))
		die(_("Failed to resolve '%s' as a valid ref."), rev);

	commit = lookup_commit_reference(sha1);
	if (!commit)
		die(_("Could not parse object '%s'."), rev);
	hashcpy(sha1, commit->object.sha1);

	if (patch_mode) {
		if (reset_type != NONE)
			die(_("--patch is incompatible with --{hard,mixed,soft}"));
		return interactive_reset(rev, argv + i, prefix);
	}

	/* 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 (i < argc) {
		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]));
		return read_from_tree(prefix, argv + i, sha1,
				quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN);
	}
	if (reset_type == NONE)
		reset_type = MIXED; /* by default */

	if (reset_type != SOFT && reset_type != MIXED)
		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]));

	/* 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)
		die_if_unmerged_cache(reset_type);
	else {
		int err;
		if (reset_type == KEEP)
			die_if_unmerged_cache(reset_type);
		err = reset_index_file(sha1, reset_type, quiet);
		if (reset_type == KEEP)
			err = err || reset_index_file(sha1, MIXED, quiet);
		if (err)
			die(_("Could not reset index file to revision '%s'."), rev);
	}

	/* Any resets update HEAD to the head being switched to,
	 * saving the previous head in ORIG_HEAD before. */
	if (!get_sha1("ORIG_HEAD", sha1_old_orig))
		old_orig = sha1_old_orig;
	if (!get_sha1("HEAD", sha1_orig)) {
		orig = sha1_orig;
		set_reflog_message(&msg, "updating ORIG_HEAD", NULL);
		update_ref(msg.buf, "ORIG_HEAD", orig, old_orig, 0, MSG_ON_ERR);
	}
	else if (old_orig)
		delete_ref("ORIG_HEAD", old_orig, 0);
	set_reflog_message(&msg, "updating HEAD", rev);
	update_ref_status = update_ref(msg.buf, "HEAD", sha1, orig, 0, MSG_ON_ERR);

	switch (reset_type) {
	case HARD:
		if (!update_ref_status && !quiet)
			print_new_head_line(commit);
		break;
	case SOFT: /* Nothing else to do. */
		break;
	case MIXED: /* Report what has not been updated. */
		update_index_refresh(0, NULL,
				quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN);
		break;
	}

	remove_branch_state();

	strbuf_release(&msg);

	return update_ref_status;
}
Ejemplo n.º 6
0
Archivo: reset.c Proyecto: guban/git
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, nul_term_line = 0, read_from_stdin = 0, unborn;
	char **stdin_paths = NULL;
	int stdin_nr = 0, stdin_alloc = 0;
	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_BOOL('z', NULL, &nul_term_line,
			N_("EXPERIMENTAL: paths are separated with NUL character")),
		OPT_BOOL(0, "stdin", &read_from_stdin,
				N_("EXPERIMENTAL: read paths from <stdin>")),
		OPT_END()
	};

	git_config(git_reset_config, NULL);

	argc = parse_options(argc, argv, prefix, options, git_reset_usage,
						PARSE_OPT_KEEP_DASHDASH);
	parse_args(&pathspec, argv, prefix, patch_mode, &rev);

	if (read_from_stdin) {
		strbuf_getline_fn getline_fn = nul_term_line ?
			strbuf_getline_nul : strbuf_getline_lf;
		int flags = PATHSPEC_PREFER_FULL;
		struct strbuf buf = STRBUF_INIT;
		struct strbuf unquoted = STRBUF_INIT;

		if (patch_mode)
			die(_("--stdin is incompatible with --patch"));

		if (pathspec.nr)
			die(_("--stdin is incompatible with path arguments"));

		while (getline_fn(&buf, stdin) != EOF) {
			if (!nul_term_line && buf.buf[0] == '"') {
				strbuf_reset(&unquoted);
				if (unquote_c_style(&unquoted, buf.buf, NULL))
					die(_("line is badly quoted"));
				strbuf_swap(&buf, &unquoted);
			}
			ALLOC_GROW(stdin_paths, stdin_nr + 1, stdin_alloc);
			stdin_paths[stdin_nr++] = xstrdup(buf.buf);
			strbuf_reset(&buf);
		}
		strbuf_release(&unquoted);
		strbuf_release(&buf);

		ALLOC_GROW(stdin_paths, stdin_nr + 1, stdin_alloc);
		stdin_paths[stdin_nr++] = NULL;
		flags |= PATHSPEC_LITERAL_PATH;
		parse_pathspec(&pathspec, 0, flags, prefix,
			       (const char **)stdin_paths);

	} else if (nul_term_line)
		die(_("-z requires --stdin"));

	unborn = !strcmp(rev, "HEAD") && get_oid("HEAD", &oid);
	if (unborn) {
		/* reset on unborn branch: treat as reset to empty tree */
		hashcpy(oid.hash, EMPTY_TREE_SHA1_BIN);
	} 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(&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}"));
		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 (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;
			if (get_git_work_tree())
				refresh_index(&the_index, flags, NULL, NULL,
					      _("Unstaged changes after reset:"));
		} 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(&oid));
	}
	if (!pathspec.nr)
		remove_branch_state();

	if (stdin_paths) {
		while (stdin_nr)
			free(stdin_paths[--stdin_nr]);
		free(stdin_paths);
	}

	return update_ref_status;
}