[02/13] dir: extract directory-matching logic

Commit Message

Derrick Stolee Aug. 24, 2021, 9:54 p.m. UTC

From: Derrick Stolee <[e-mail]>

The last_matching_pattern_from_list() logic performs some checks on the
filetype of a path within the index when the PATTERN_FLAG_MUSTBEDIR flag
is set. This works great when setting SKIP_WORKTREE bits within
unpack_trees(), but doesn't work well when passing an arbitrary path
such as a file within a matching directory.

This change only rearranges the logic but does not change its
functionality.

We will expand the path_matches_dir_pattern() method in a following
change.

Signed-off-by: Derrick Stolee <[e-mail]>
---
 dir.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

Patch

diff --git a/dir.c b/dir.c
index 86afa2eae00..652135df896 100644
--- a/dir.c
+++ b/dir.c
@@ -1303,6 +1303,19 @@  int match_pathname(const char *pathname, int pathlen,
 				 WM_PATHNAME) == 0;
 }
 
+static int path_matches_dir_pattern(const char *pathname,
+				    int pathlen,
+				    int *dtype,
+				    struct path_pattern *pattern,
+				    struct index_state *istate)
+{
+	*dtype = resolve_dtype(*dtype, istate, pathname, pathlen);
+	if (*dtype != DT_DIR)
+		return 0;
+
+	return 1;
+}
+
 /*
  * Scan the given exclude list in reverse to see whether pathname
  * should be ignored.  The first match (i.e. the last on the list), if
@@ -1327,11 +1340,10 @@  static struct path_pattern *last_matching_pattern_from_list(const char *pathname
 		const char *exclude = pattern->pattern;
 		int prefix = pattern->nowildcardlen;
 
-		if (pattern->flags & PATTERN_FLAG_MUSTBEDIR) {
-			*dtype = resolve_dtype(*dtype, istate, pathname, pathlen);
-			if (*dtype != DT_DIR)
-				continue;
-		}
+		if ((pattern->flags & PATTERN_FLAG_MUSTBEDIR) &&
+		    !path_matches_dir_pattern(pathname, pathlen,
+					      dtype, pattern, istate))
+			continue;
 
 		if (pattern->flags & PATTERN_FLAG_NODIR) {
 			if (match_basename(basename,