checkout: add test demonstrating regression with checkout -b on initial commit

diff --git a/fetch-pack.h b/fetch-pack.h
index bb45a366a82a4a7dae2524e0845ac33128076c57..2160be9164b4df0f46f4a604c7c1715371cc8977 100644 (file)
--- a/fetch-pack.h
+++ b/fetch-pack.h
@@ -41,6 +41,21 @@ struct fetch_pack_args {
         * regardless of which object flags it uses (if any).
         */
        unsigned no_dependents:1;
+
+       /*
+        * Because fetch_pack() overwrites the shallow file upon a
+        * successful deepening non-clone fetch, if this struct
+        * specifies such a fetch, fetch_pack() needs to perform a
+        * connectivity check before deciding if a fetch is successful
+        * (and overwriting the shallow file). fetch_pack() sets this
+        * field to 1 if such a connectivity check was performed.
+        *
+        * This is different from check_self_contained_and_connected
+        * in that the former allows existing objects in the
+        * repository to satisfy connectivity needs, whereas the
+        * latter doesn't.
+        */
+       unsigned connectivity_checked:1;
 };
 
 /*