[PATCH v3 15/31] ls-files: convert to use parse_pathspec

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

strip_trailing_slash_from_submodules() modifies pathspec and is moved
to dir.c, close to other pathspec code. It'll be removed later when
parse_pathspec() learns to take over its job.

This commit introduces a subtle bug:

- when match_pathspec() returns seen[], it follows the order of the
  input "const char **pathspec", which is now pathspec.raw[]

- when match_pathspec() returns seen[], it follows the order of
  pathspec.items[]

- due to 86e4ca6 (tree_entry_interesting(): fix depth limit with
  overlapping pathspecs - 2010-12-15), pathspec.items[] is sorted, but
  pathspec.raw[] is NOT.

by converting from match_pathspec() to match_pathspec_depth(), we also
have to switch the original path array. The bug causes wrong error
messages (e.g. if the first pathspec is faulty, it may report the
second..). report_path_error will be fixed in a separate patch.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 builtin/ls-files.c | 45 ++++++++++++---------------------------------
 1 file changed, 12 insertions(+), 33 deletions(-)

diff --git a/builtin/ls-files.c b/builtin/ls-files.c
index 373c573..8905bd3 100644
--- a/builtin/ls-files.c
+++ b/builtin/ls-files.c
@@ -30,7 +30,7 @@ static int debug_mode;
 static const char *prefix;
 static int max_prefix_len;
 static int prefix_len;
-static const char **pathspec;
+static struct pathspec pathspec;
 static int error_unmatch;
 static char *ps_matched;
 static const char *with_tree;
@@ -58,7 +58,7 @@ static void show_dir_entry(const char *tag, struct dir_entry *ent)
 	if (len >= ent->len)
 		die("git ls-files: internal error - directory entry not superset of prefix");
 
-	if (!match_pathspec(pathspec, ent->name, ent->len, len, ps_matched))
+	if (!match_pathspec_depth(&pathspec, ent->name, ent->len, len, ps_matched))
 		return;
 
 	fputs(tag, stdout);
@@ -133,7 +133,7 @@ static void show_ce_entry(const char *tag, struct cache_entry *ce)
 	if (len >= ce_namelen(ce))
 		die("git ls-files: internal error - cache entry not superset of prefix");
 
-	if (!match_pathspec(pathspec, ce->name, ce_namelen(ce), len, ps_matched))
+	if (!match_pathspec_depth(&pathspec, ce->name, ce_namelen(ce), len, ps_matched))
 		return;
 
 	if (tag && *tag && show_valid_bit &&
@@ -187,7 +187,7 @@ static void show_ru_info(void)
 		len = strlen(path);
 		if (len < max_prefix_len)
 			continue; /* outside of the prefix */
-		if (!match_pathspec(pathspec, path, len, max_prefix_len, ps_matched))
+		if (!match_pathspec_depth(&pathspec, path, len, max_prefix_len, ps_matched))
 			continue; /* uninterested */
 		for (i = 0; i < 3; i++) {
 			if (!ui->mode[i])
@@ -216,7 +216,7 @@ static void show_files(struct dir_struct *dir)
 
 	/* For cached/deleted files we don't need to even do the readdir */
 	if (show_others || show_killed) {
-		fill_directory(dir, pathspec);
+		fill_directory(dir, pathspec.raw);
 		if (show_others)
 			show_other_files(dir);
 		if (show_killed)
@@ -287,21 +287,6 @@ static void prune_cache(const char *prefix)
 	active_nr = last;
 }
 
-static void strip_trailing_slash_from_submodules(void)
-{
-	const char **p;
-
-	for (p = pathspec; *p != NULL; p++) {
-		int len = strlen(*p), pos;
-
-		if (len < 1 || (*p)[len - 1] != '/')
-			continue;
-		pos = cache_name_pos(*p, len - 1);
-		if (pos >= 0 && S_ISGITLINK(active_cache[pos]->ce_mode))
-			*p = xstrndup(*p, len - 1);
-	}
-}
-
 /*
  * Read the tree specified with --with-tree option
  * (typically, HEAD) into stage #1 and then
@@ -549,23 +534,17 @@ int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 	if (require_work_tree && !is_inside_work_tree())
 		setup_work_tree();
 
-	pathspec = get_pathspec(prefix, argv);
-
-	/* be nice with submodule paths ending in a slash */
-	if (pathspec)
-		strip_trailing_slash_from_submodules();
+	parse_pathspec(&pathspec, PATHSPEC_FROMTOP,
+		       PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP,
+		       prefix, argv);
 
 	/* Find common prefix for all pathspec's */
-	max_prefix = common_prefix(pathspec);
+	max_prefix = common_prefix(pathspec.raw);
 	max_prefix_len = max_prefix ? strlen(max_prefix) : 0;
 
 	/* Treat unmatching pathspec elements as errors */
-	if (pathspec && error_unmatch) {
-		int num;
-		for (num = 0; pathspec[num]; num++)
-			;
-		ps_matched = xcalloc(1, num);
-	}
+	if (pathspec.nr && error_unmatch)
+		ps_matched = xcalloc(1, pathspec.nr);
 
 	if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
 		die("ls-files --ignored needs some exclude pattern");
@@ -592,7 +571,7 @@ int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 
 	if (ps_matched) {
 		int bad;
-		bad = report_path_error(ps_matched, pathspec, prefix);
+		bad = report_path_error(ps_matched, pathspec.raw, prefix);
 		if (bad)
 			fprintf(stderr, "Did you forget to 'git add'?\n");
 
-- 
1.8.0.rc2.23.g1fb49df