Squashed 'third_party/git/' content from commit cb71568594

git-subtree-dir: third_party/git
git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7

1 files changed, 692 insertions, 0 deletions

diff --git a/builtin/ls-files.c b/builtin/ls-files.c
new file mode 100644
index 000000000000..670e8fb93c93
--- /dev/null
+++ b/builtin/ls-files.c
@@ -0,0 +1,692 @@
+/*
+ * This merges the file listing in the directory cache index
+ * with the actual working directory list, and shows different
+ * combinations of the two.
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ */
+#include "cache.h"
+#include "repository.h"
+#include "config.h"
+#include "quote.h"
+#include "dir.h"
+#include "builtin.h"
+#include "tree.h"
+#include "parse-options.h"
+#include "resolve-undo.h"
+#include "string-list.h"
+#include "pathspec.h"
+#include "run-command.h"
+#include "submodule.h"
+#include "submodule-config.h"
+
+static int abbrev;
+static int show_deleted;
+static int show_cached;
+static int show_others;
+static int show_stage;
+static int show_unmerged;
+static int show_resolve_undo;
+static int show_modified;
+static int show_killed;
+static int show_valid_bit;
+static int show_fsmonitor_bit;
+static int line_terminator = '\n';
+static int debug_mode;
+static int show_eol;
+static int recurse_submodules;
+
+static const char *prefix;
+static int max_prefix_len;
+static int prefix_len;
+static struct pathspec pathspec;
+static int error_unmatch;
+static char *ps_matched;
+static const char *with_tree;
+static int exc_given;
+static int exclude_args;
+
+static const char *tag_cached = "";
+static const char *tag_unmerged = "";
+static const char *tag_removed = "";
+static const char *tag_other = "";
+static const char *tag_killed = "";
+static const char *tag_modified = "";
+static const char *tag_skip_worktree = "";
+static const char *tag_resolve_undo = "";
+
+static void write_eolinfo(const struct index_state *istate,
+			  const struct cache_entry *ce, const char *path)
+{
+	if (show_eol) {
+		struct stat st;
+		const char *i_txt = "";
+		const char *w_txt = "";
+		const char *a_txt = get_convert_attr_ascii(istate, path);
+		if (ce && S_ISREG(ce->ce_mode))
+			i_txt = get_cached_convert_stats_ascii(istate,
+							       ce->name);
+		if (!lstat(path, &st) && S_ISREG(st.st_mode))
+			w_txt = get_wt_convert_stats_ascii(path);
+		printf("i/%-5s w/%-5s attr/%-17s\t", i_txt, w_txt, a_txt);
+	}
+}
+
+static void write_name(const char *name)
+{
+	/*
+	 * With "--full-name", prefix_len=0; this caller needs to pass
+	 * an empty string in that case (a NULL is good for "").
+	 */
+	write_name_quoted_relative(name, prefix_len ? prefix : NULL,
+				   stdout, line_terminator);
+}
+
+static const char *get_tag(const struct cache_entry *ce, const char *tag)
+{
+	static char alttag[4];
+
+	if (tag && *tag && ((show_valid_bit && (ce->ce_flags & CE_VALID)) ||
+		(show_fsmonitor_bit && (ce->ce_flags & CE_FSMONITOR_VALID)))) {
+		memcpy(alttag, tag, 3);
+
+		if (isalpha(tag[0])) {
+			alttag[0] = tolower(tag[0]);
+		} else if (tag[0] == '?') {
+			alttag[0] = '!';
+		} else {
+			alttag[0] = 'v';
+			alttag[1] = tag[0];
+			alttag[2] = ' ';
+			alttag[3] = 0;
+		}
+
+		tag = alttag;
+	}
+
+	return tag;
+}
+
+static void print_debug(const struct cache_entry *ce)
+{
+	if (debug_mode) {
+		const struct stat_data *sd = &ce->ce_stat_data;
+
+		printf("  ctime: %u:%u\n", sd->sd_ctime.sec, sd->sd_ctime.nsec);
+		printf("  mtime: %u:%u\n", sd->sd_mtime.sec, sd->sd_mtime.nsec);
+		printf("  dev: %u\tino: %u\n", sd->sd_dev, sd->sd_ino);
+		printf("  uid: %u\tgid: %u\n", sd->sd_uid, sd->sd_gid);
+		printf("  size: %u\tflags: %x\n", sd->sd_size, ce->ce_flags);
+	}
+}
+
+static void show_dir_entry(const struct index_state *istate,
+			   const char *tag, struct dir_entry *ent)
+{
+	int len = max_prefix_len;
+
+	if (len > ent->len)
+		die("git ls-files: internal error - directory entry not superset of prefix");
+
+	if (!dir_path_match(istate, ent, &pathspec, len, ps_matched))
+		return;
+
+	fputs(tag, stdout);
+	write_eolinfo(istate, NULL, ent->name);
+	write_name(ent->name);
+}
+
+static void show_other_files(const struct index_state *istate,
+			     const struct dir_struct *dir)
+{
+	int i;
+
+	for (i = 0; i < dir->nr; i++) {
+		struct dir_entry *ent = dir->entries[i];
+		if (!index_name_is_other(istate, ent->name, ent->len))
+			continue;
+		show_dir_entry(istate, tag_other, ent);
+	}
+}
+
+static void show_killed_files(const struct index_state *istate,
+			      const struct dir_struct *dir)
+{
+	int i;
+	for (i = 0; i < dir->nr; i++) {
+		struct dir_entry *ent = dir->entries[i];
+		char *cp, *sp;
+		int pos, len, killed = 0;
+
+		for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
+			sp = strchr(cp, '/');
+			if (!sp) {
+				/* If ent->name is prefix of an entry in the
+				 * cache, it will be killed.
+				 */
+				pos = index_name_pos(istate, ent->name, ent->len);
+				if (0 <= pos)
+					BUG("killed-file %.*s not found",
+						ent->len, ent->name);
+				pos = -pos - 1;
+				while (pos < istate->cache_nr &&
+				       ce_stage(istate->cache[pos]))
+					pos++; /* skip unmerged */
+				if (istate->cache_nr <= pos)
+					break;
+				/* pos points at a name immediately after
+				 * ent->name in the cache.  Does it expect
+				 * ent->name to be a directory?
+				 */
+				len = ce_namelen(istate->cache[pos]);
+				if ((ent->len < len) &&
+				    !strncmp(istate->cache[pos]->name,
+					     ent->name, ent->len) &&
+				    istate->cache[pos]->name[ent->len] == '/')
+					killed = 1;
+				break;
+			}
+			if (0 <= index_name_pos(istate, ent->name, sp - ent->name)) {
+				/* If any of the leading directories in
+				 * ent->name is registered in the cache,
+				 * ent->name will be killed.
+				 */
+				killed = 1;
+				break;
+			}
+		}
+		if (killed)
+			show_dir_entry(istate, tag_killed, dir->entries[i]);
+	}
+}
+
+static void show_files(struct repository *repo, struct dir_struct *dir);
+
+static void show_submodule(struct repository *superproject,
+			   struct dir_struct *dir, const char *path)
+{
+	struct repository subrepo;
+	const struct submodule *sub = submodule_from_path(superproject,
+							  &null_oid, path);
+
+	if (repo_submodule_init(&subrepo, superproject, sub))
+		return;
+
+	if (repo_read_index(&subrepo) < 0)
+		die("index file corrupt");
+
+	show_files(&subrepo, dir);
+
+	repo_clear(&subrepo);
+}
+
+static void show_ce(struct repository *repo, struct dir_struct *dir,
+		    const struct cache_entry *ce, const char *fullname,
+		    const char *tag)
+{
+	if (max_prefix_len > strlen(fullname))
+		die("git ls-files: internal error - cache entry not superset of prefix");
+
+	if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&
+	    is_submodule_active(repo, ce->name)) {
+		show_submodule(repo, dir, ce->name);
+	} else if (match_pathspec(repo->index, &pathspec, fullname, strlen(fullname),
+				  max_prefix_len, ps_matched,
+				  S_ISDIR(ce->ce_mode) ||
+				  S_ISGITLINK(ce->ce_mode))) {
+		tag = get_tag(ce, tag);
+
+		if (!show_stage) {
+			fputs(tag, stdout);
+		} else {
+			printf("%s%06o %s %d\t",
+			       tag,
+			       ce->ce_mode,
+			       find_unique_abbrev(&ce->oid, abbrev),
+			       ce_stage(ce));
+		}
+		write_eolinfo(repo->index, ce, fullname);
+		write_name(fullname);
+		print_debug(ce);
+	}
+}
+
+static void show_ru_info(const struct index_state *istate)
+{
+	struct string_list_item *item;
+
+	if (!istate->resolve_undo)
+		return;
+
+	for_each_string_list_item(item, istate->resolve_undo) {
+		const char *path = item->string;
+		struct resolve_undo_info *ui = item->util;
+		int i, len;
+
+		len = strlen(path);
+		if (len < max_prefix_len)
+			continue; /* outside of the prefix */
+		if (!match_pathspec(istate, &pathspec, path, len,
+				    max_prefix_len, ps_matched, 0))
+			continue; /* uninterested */
+		for (i = 0; i < 3; i++) {
+			if (!ui->mode[i])
+				continue;
+			printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
+			       find_unique_abbrev(&ui->oid[i], abbrev),
+			       i + 1);
+			write_name(path);
+		}
+	}
+}
+
+static int ce_excluded(struct dir_struct *dir, struct index_state *istate,
+		       const char *fullname, const struct cache_entry *ce)
+{
+	int dtype = ce_to_dtype(ce);
+	return is_excluded(dir, istate, fullname, &dtype);
+}
+
+static void construct_fullname(struct strbuf *out, const struct repository *repo,
+			       const struct cache_entry *ce)
+{
+	strbuf_reset(out);
+	if (repo->submodule_prefix)
+		strbuf_addstr(out, repo->submodule_prefix);
+	strbuf_addstr(out, ce->name);
+}
+
+static void show_files(struct repository *repo, struct dir_struct *dir)
+{
+	int i;
+	struct strbuf fullname = STRBUF_INIT;
+
+	/* For cached/deleted files we don't need to even do the readdir */
+	if (show_others || show_killed) {
+		if (!show_others)
+			dir->flags |= DIR_COLLECT_KILLED_ONLY;
+		fill_directory(dir, repo->index, &pathspec);
+		if (show_others)
+			show_other_files(repo->index, dir);
+		if (show_killed)
+			show_killed_files(repo->index, dir);
+	}
+	if (show_cached || show_stage) {
+		for (i = 0; i < repo->index->cache_nr; i++) {
+			const struct cache_entry *ce = repo->index->cache[i];
+
+			construct_fullname(&fullname, repo, ce);
+
+			if ((dir->flags & DIR_SHOW_IGNORED) &&
+			    !ce_excluded(dir, repo->index, fullname.buf, ce))
+				continue;
+			if (show_unmerged && !ce_stage(ce))
+				continue;
+			if (ce->ce_flags & CE_UPDATE)
+				continue;
+			show_ce(repo, dir, ce, fullname.buf,
+				ce_stage(ce) ? tag_unmerged :
+				(ce_skip_worktree(ce) ? tag_skip_worktree :
+				 tag_cached));
+		}
+	}
+	if (show_deleted || show_modified) {
+		for (i = 0; i < repo->index->cache_nr; i++) {
+			const struct cache_entry *ce = repo->index->cache[i];
+			struct stat st;
+			int err;
+
+			construct_fullname(&fullname, repo, ce);
+
+			if ((dir->flags & DIR_SHOW_IGNORED) &&
+			    !ce_excluded(dir, repo->index, fullname.buf, ce))
+				continue;
+			if (ce->ce_flags & CE_UPDATE)
+				continue;
+			if (ce_skip_worktree(ce))
+				continue;
+			err = lstat(fullname.buf, &st);
+			if (show_deleted && err)
+				show_ce(repo, dir, ce, fullname.buf, tag_removed);
+			if (show_modified && ie_modified(repo->index, ce, &st, 0))
+				show_ce(repo, dir, ce, fullname.buf, tag_modified);
+		}
+	}
+
+	strbuf_release(&fullname);
+}
+
+/*
+ * Prune the index to only contain stuff starting with "prefix"
+ */
+static void prune_index(struct index_state *istate,
+			const char *prefix, size_t prefixlen)
+{
+	int pos;
+	unsigned int first, last;
+
+	if (!prefix || !istate->cache_nr)
+		return;
+	pos = index_name_pos(istate, prefix, prefixlen);
+	if (pos < 0)
+		pos = -pos-1;
+	first = pos;
+	last = istate->cache_nr;
+	while (last > first) {
+		int next = first + ((last - first) >> 1);
+		const struct cache_entry *ce = istate->cache[next];
+		if (!strncmp(ce->name, prefix, prefixlen)) {
+			first = next+1;
+			continue;
+		}
+		last = next;
+	}
+	MOVE_ARRAY(istate->cache, istate->cache + pos, last - pos);
+	istate->cache_nr = last - pos;
+}
+
+static int get_common_prefix_len(const char *common_prefix)
+{
+	int common_prefix_len;
+
+	if (!common_prefix)
+		return 0;
+
+	common_prefix_len = strlen(common_prefix);
+
+	/*
+	 * If the prefix has a trailing slash, strip it so that submodules wont
+	 * be pruned from the index.
+	 */
+	if (common_prefix[common_prefix_len - 1] == '/')
+		common_prefix_len--;
+
+	return common_prefix_len;
+}
+
+/*
+ * Read the tree specified with --with-tree option
+ * (typically, HEAD) into stage #1 and then
+ * squash them down to stage #0.  This is used for
+ * --error-unmatch to list and check the path patterns
+ * that were given from the command line.  We are not
+ * going to write this index out.
+ */
+void overlay_tree_on_index(struct index_state *istate,
+			   const char *tree_name, const char *prefix)
+{
+	struct tree *tree;
+	struct object_id oid;
+	struct pathspec pathspec;
+	struct cache_entry *last_stage0 = NULL;
+	int i;
+
+	if (get_oid(tree_name, &oid))
+		die("tree-ish %s not found.", tree_name);
+	tree = parse_tree_indirect(&oid);
+	if (!tree)
+		die("bad tree-ish %s", tree_name);
+
+	/* Hoist the unmerged entries up to stage #3 to make room */
+	for (i = 0; i < istate->cache_nr; i++) {
+		struct cache_entry *ce = istate->cache[i];
+		if (!ce_stage(ce))
+			continue;
+		ce->ce_flags |= CE_STAGEMASK;
+	}
+
+	if (prefix) {
+		static const char *(matchbuf[1]);
+		matchbuf[0] = NULL;
+		parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC,
+			       PATHSPEC_PREFER_CWD, prefix, matchbuf);
+	} else
+		memset(&pathspec, 0, sizeof(pathspec));
+	if (read_tree(the_repository, tree, 1, &pathspec, istate))
+		die("unable to read tree entries %s", tree_name);
+
+	for (i = 0; i < istate->cache_nr; i++) {
+		struct cache_entry *ce = istate->cache[i];
+		switch (ce_stage(ce)) {
+		case 0:
+			last_stage0 = ce;
+			/* fallthru */
+		default:
+			continue;
+		case 1:
+			/*
+			 * If there is stage #0 entry for this, we do not
+			 * need to show it.  We use CE_UPDATE bit to mark
+			 * such an entry.
+			 */
+			if (last_stage0 &&
+			    !strcmp(last_stage0->name, ce->name))
+				ce->ce_flags |= CE_UPDATE;
+		}
+	}
+}
+
+static const char * const ls_files_usage[] = {
+	N_("git ls-files [<options>] [<file>...]"),
+	NULL
+};
+
+static int option_parse_exclude(const struct option *opt,
+				const char *arg, int unset)
+{
+	struct string_list *exclude_list = opt->value;
+
+	BUG_ON_OPT_NEG(unset);
+
+	exc_given = 1;
+	string_list_append(exclude_list, arg);
+
+	return 0;
+}
+
+static int option_parse_exclude_from(const struct option *opt,
+				     const char *arg, int unset)
+{
+	struct dir_struct *dir = opt->value;
+
+	BUG_ON_OPT_NEG(unset);
+
+	exc_given = 1;
+	add_excludes_from_file(dir, arg);
+
+	return 0;
+}
+
+static int option_parse_exclude_standard(const struct option *opt,
+					 const char *arg, int unset)
+{
+	struct dir_struct *dir = opt->value;
+
+	BUG_ON_OPT_NEG(unset);
+	BUG_ON_OPT_ARG(arg);
+
+	exc_given = 1;
+	setup_standard_excludes(dir);
+
+	return 0;
+}
+
+int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
+{
+	int require_work_tree = 0, show_tag = 0, i;
+	const char *max_prefix;
+	struct dir_struct dir;
+	struct exclude_list *el;
+	struct string_list exclude_list = STRING_LIST_INIT_NODUP;
+	struct option builtin_ls_files_options[] = {
+		/* Think twice before adding "--nul" synonym to this */
+		OPT_SET_INT('z', NULL, &line_terminator,
+			N_("paths are separated with NUL character"), '\0'),
+		OPT_BOOL('t', NULL, &show_tag,
+			N_("identify the file status with tags")),
+		OPT_BOOL('v', NULL, &show_valid_bit,
+			N_("use lowercase letters for 'assume unchanged' files")),
+		OPT_BOOL('f', NULL, &show_fsmonitor_bit,
+			N_("use lowercase letters for 'fsmonitor clean' files")),
+		OPT_BOOL('c', "cached", &show_cached,
+			N_("show cached files in the output (default)")),
+		OPT_BOOL('d', "deleted", &show_deleted,
+			N_("show deleted files in the output")),
+		OPT_BOOL('m', "modified", &show_modified,
+			N_("show modified files in the output")),
+		OPT_BOOL('o', "others", &show_others,
+			N_("show other files in the output")),
+		OPT_BIT('i', "ignored", &dir.flags,
+			N_("show ignored files in the output"),
+			DIR_SHOW_IGNORED),
+		OPT_BOOL('s', "stage", &show_stage,
+			N_("show staged contents' object name in the output")),
+		OPT_BOOL('k', "killed", &show_killed,
+			N_("show files on the filesystem that need to be removed")),
+		OPT_BIT(0, "directory", &dir.flags,
+			N_("show 'other' directories' names only"),
+			DIR_SHOW_OTHER_DIRECTORIES),
+		OPT_BOOL(0, "eol", &show_eol, N_("show line endings of files")),
+		OPT_NEGBIT(0, "empty-directory", &dir.flags,
+			N_("don't show empty directories"),
+			DIR_HIDE_EMPTY_DIRECTORIES),
+		OPT_BOOL('u', "unmerged", &show_unmerged,
+			N_("show unmerged files in the output")),
+		OPT_BOOL(0, "resolve-undo", &show_resolve_undo,
+			    N_("show resolve-undo information")),
+		{ OPTION_CALLBACK, 'x', "exclude", &exclude_list, N_("pattern"),
+			N_("skip files matching pattern"),
+			PARSE_OPT_NONEG, option_parse_exclude },
+		{ OPTION_CALLBACK, 'X', "exclude-from", &dir, N_("file"),
+			N_("exclude patterns are read from <file>"),
+			PARSE_OPT_NONEG, option_parse_exclude_from },
+		OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, N_("file"),
+			N_("read additional per-directory exclude patterns in <file>")),
+		{ OPTION_CALLBACK, 0, "exclude-standard", &dir, NULL,
+			N_("add the standard git exclusions"),
+			PARSE_OPT_NOARG | PARSE_OPT_NONEG,
+			option_parse_exclude_standard },
+		OPT_SET_INT_F(0, "full-name", &prefix_len,
+			      N_("make the output relative to the project top directory"),
+			      0, PARSE_OPT_NONEG),
+		OPT_BOOL(0, "recurse-submodules", &recurse_submodules,
+			N_("recurse through submodules")),
+		OPT_BOOL(0, "error-unmatch", &error_unmatch,
+			N_("if any <file> is not in the index, treat this as an error")),
+		OPT_STRING(0, "with-tree", &with_tree, N_("tree-ish"),
+			N_("pretend that paths removed since <tree-ish> are still present")),
+		OPT__ABBREV(&abbrev),
+		OPT_BOOL(0, "debug", &debug_mode, N_("show debugging data")),
+		OPT_END()
+	};
+
+	if (argc == 2 && !strcmp(argv[1], "-h"))
+		usage_with_options(ls_files_usage, builtin_ls_files_options);
+
+	memset(&dir, 0, sizeof(dir));
+	prefix = cmd_prefix;
+	if (prefix)
+		prefix_len = strlen(prefix);
+	git_config(git_default_config, NULL);
+
+	if (repo_read_index(the_repository) < 0)
+		die("index file corrupt");
+
+	argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
+			ls_files_usage, 0);
+	el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
+	for (i = 0; i < exclude_list.nr; i++) {
+		add_exclude(exclude_list.items[i].string, "", 0, el, --exclude_args);
+	}
+	if (show_tag || show_valid_bit || show_fsmonitor_bit) {
+		tag_cached = "H ";
+		tag_unmerged = "M ";
+		tag_removed = "R ";
+		tag_modified = "C ";
+		tag_other = "? ";
+		tag_killed = "K ";
+		tag_skip_worktree = "S ";
+		tag_resolve_undo = "U ";
+	}
+	if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
+		require_work_tree = 1;
+	if (show_unmerged)
+		/*
+		 * There's no point in showing unmerged unless
+		 * you also show the stage information.
+		 */
+		show_stage = 1;
+	if (dir.exclude_per_dir)
+		exc_given = 1;
+
+	if (require_work_tree && !is_inside_work_tree())
+		setup_work_tree();
+
+	if (recurse_submodules &&
+	    (show_stage || show_deleted || show_others || show_unmerged ||
+	     show_killed || show_modified || show_resolve_undo || with_tree))
+		die("ls-files --recurse-submodules unsupported mode");
+
+	if (recurse_submodules && error_unmatch)
+		die("ls-files --recurse-submodules does not support "
+		    "--error-unmatch");
+
+	parse_pathspec(&pathspec, 0,
+		       PATHSPEC_PREFER_CWD,
+		       prefix, argv);
+
+	/*
+	 * Find common prefix for all pathspec's
+	 * This is used as a performance optimization which unfortunately cannot
+	 * be done when recursing into submodules because when a pathspec is
+	 * given which spans repository boundaries you can't simply remove the
+	 * submodule entry because the pathspec may match something inside the
+	 * submodule.
+	 */
+	if (recurse_submodules)
+		max_prefix = NULL;
+	else
+		max_prefix = common_prefix(&pathspec);
+	max_prefix_len = get_common_prefix_len(max_prefix);
+
+	prune_index(the_repository->index, max_prefix, max_prefix_len);
+
+	/* Treat unmatching pathspec elements as errors */
+	if (pathspec.nr && error_unmatch)
+		ps_matched = xcalloc(pathspec.nr, 1);
+
+	if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
+		die("ls-files --ignored needs some exclude pattern");
+
+	/* With no flags, we default to showing the cached files */
+	if (!(show_stage || show_deleted || show_others || show_unmerged ||
+	      show_killed || show_modified || show_resolve_undo))
+		show_cached = 1;
+
+	if (with_tree) {
+		/*
+		 * Basic sanity check; show-stages and show-unmerged
+		 * would not make any sense with this option.
+		 */
+		if (show_stage || show_unmerged)
+			die("ls-files --with-tree is incompatible with -s or -u");
+		overlay_tree_on_index(the_repository->index, with_tree, max_prefix);
+	}
+
+	show_files(the_repository, &dir);
+
+	if (show_resolve_undo)
+		show_ru_info(the_repository->index);
+
+	if (ps_matched) {
+		int bad;
+		bad = report_path_error(ps_matched, &pathspec);
+		if (bad)
+			fprintf(stderr, "Did you forget to 'git add'?\n");
+
+		return bad ? 1 : 0;
+	}
+
+	UNLEAK(dir);
+	return 0;
+}