This flag is equivalent to builtin/ls-files.c:strip_trailing_slashes()
and is intended to replace that function when ls-files is converted to
use parse_pathspec.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
 pathspec.c | 9 +++++++++
 pathspec.h | 2 ++
 2 files changed, 11 insertions(+)

diff --git a/pathspec.c b/pathspec.c
index a352ef1..e3c8339 100644
--- a/pathspec.c
+++ b/pathspec.c
@@ -205,6 +205,15 @@ static unsigned prefix_pathspec(struct pathspec_item *item,
        *raw = item->match = match;
        item->original = elt;
        item->len = strlen(item->match);
+
+       if ((flags & PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP) &&
+           (item->len >= 1 && item->match[item->len - 1] == '/') &&
+           (i = cache_name_pos(item->match, item->len - 1)) >= 0 &&
+           S_ISGITLINK(active_cache[i]->ce_mode)) {
+               item->len--;
+               match[item->len] = '\0';
+       }
+
        if (limit_pathspec_to_literal())
                item->nowildcard_len = item->len;
        else
diff --git a/pathspec.h b/pathspec.h
index aa98597..7935b26 100644
--- a/pathspec.h
+++ b/pathspec.h
@@ -31,6 +31,8 @@ struct pathspec {
 #define PATHSPEC_PREFER_CWD (1<<0) /* No args means match cwd */
 #define PATHSPEC_PREFER_FULL (1<<1) /* No args means match everything */
 #define PATHSPEC_MAXDEPTH_VALID (1<<2) /* max_depth field is valid */
+/* stripping the trailing slash if the given path is a gitlink */
+#define PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP (1<<3)
 
 extern int init_pathspec(struct pathspec *, const char **);
 extern void parse_pathspec(struct pathspec *pathspec,
-- 
1.8.2.83.gc99314b

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