1 files changed, 17 insertions, 0 deletions
diff --git a/repo-access.sh b/repo-access.sh
index 2b6a5cc..b599dc8 100644
--- a/repo-access.sh
+++ b/repo-access.sh
@@ -1,4 +1,21 @@
 ##
+# systr_repo_check [<path>=PATH]
+#
+# Assert that the local repository path exists and is valid.
+##
+function systr_repo_check
+{
+    if [ $# -gt 0 ]; then
+        path="$1"
+    fi
+
+    if [ ! -f "$path/refs/HEAD" ]; then
+        echo "Fatal: $path is not a repository" >&2
+        exit 1
+    fi
+}
+
+##
 # systr_repo_resolve_reference <ref>
 #
 # Resolve a revision name to a commit ID.  The result is printed to