[PATCH v3 08/31] parse_pathspec: add PATHSPEC_EMPTY_MATCH_ALL

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

We have two ways of dealing with empty pathspec:

1. limit it to current prefix
2. match the entire working directory

Some commands go with #1, some with #2. get_pathspec() and
parse_pathspec() only supports #1. Make it support #2 too via
PATHSPEC_EMPTY_MATCH_ALL flag.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 cache.h | 3 +++
 setup.c | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/cache.h b/cache.h
index 1f51423..32231d8 100644
--- a/cache.h
+++ b/cache.h
@@ -503,6 +503,9 @@ struct pathspec {
 			    __FILE__, __LINE__, (ps)->magic & ~(mask)); \
 	} while (0)
 
+/* parse_pathspec flags */
+#define PATHSPEC_EMPTY_MATCH_ALL (1<<0) /* No args means match everything */
+
 extern int init_pathspec(struct pathspec *, const char **);
 extern void parse_pathspec(struct pathspec *pathspec, unsigned magic_mask,
 			   unsigned flags, const char *prefix,
diff --git a/setup.c b/setup.c
index 0c9fc75..d0b1d1f 100644
--- a/setup.c
+++ b/setup.c
@@ -289,6 +289,9 @@ void parse_pathspec(struct pathspec *pathspec,
 	if (!entry && !prefix)
 		return;
 
+	if (!*argv && (flags & PATHSPEC_EMPTY_MATCH_ALL))
+		return;
+
 	/* No arguments with prefix -> prefix pathspec */
 	if (!entry) {
 		static const char *raw[2];
-- 
1.8.0.rc2.23.g1fb49df