blob: fail to create a blob from a dir with EDIRECTORY

This also affects `git_index_add_bypath()` by providing a better error
message and a specific error code when a directory is passed.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/blob.c b/src/blob.c
index 07c4d92c8..ad0f4ac62 100644
--- a/src/blob.c
+++ b/src/blob.c
@@ -185,6 +185,12 @@ int git_blob__create_from_paths(
 		(error = git_repository_odb(&odb, repo)) < 0)
 		goto done;
 
+	if (S_ISDIR(st.st_mode)) {
+		giterr_set(GITERR_ODB, "cannot create blob from '%s'; it is a directory", content_path);
+		error = GIT_EDIRECTORY;
+		goto done;
+	}
+
 	if (out_st)
 		memcpy(out_st, &st, sizeof(st));