add: print an error about malformed arguments

1 files changed, 4 insertions, 1 deletions

diff --git a/src/add.c b/src/add.c
index a31c9e2..5980605 100644
--- a/src/add.c
+++ b/src/add.c
@@ -109,8 +109,11 @@ static int add_main(void *ctx, struct apk_database *db, int argc, char **argv)
 		} else {
 			apk_blob_t b = APK_BLOB_STR(argv[i]);
 			apk_blob_pull_dep(&b, db, &dep);
-			if (APK_BLOB_IS_NULL(b))
+			if (APK_BLOB_IS_NULL(b)) {
+				apk_error("'%s' is not a valid dependency, format is name(@tag)([<>=]version)", 
+					  argv[i]);
 				return -1;
+			}
 		}
 
 		if (virtpkg == NULL) {