db: fix migration and pruning of symlinks to dirs

the old code treated a symlink to directory as file; it tried
to calculate regular has of it. fix this by: 1) using no follow
on migration and pruning stats, and 2) the helper function to
check if it's point to directory and not calculate hash in that
case. fixes #188.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/io.c b/src/io.c
index 40590a2..3e292a7 100644
--- a/src/io.c
+++ b/src/io.c
@@ -487,7 +487,7 @@ int apk_file_get_info(int atfd, const char *filename, unsigned int flags,
 		.device = st.st_dev,
 	};
 
-	if (checksum == APK_CHECKSUM_NONE)
+	if (checksum == APK_CHECKSUM_NONE || S_ISDIR(st.st_mode))
 		return 0;
 
 	if ((flags & APK_FI_NOFOLLOW) && S_ISLNK(st.st_mode)) {