Add test

Author: edolstra

tests/functional/flakes/common.sh

@@ -32,6 +32,8 @@ writeSimpleFlake() {
     baseName = builtins.baseNameOf ./.;
 
     root = ./.;
+
+    number = 123;
   };
 }
 EOF

tests/functional/flakes/meson.build

@@ -36,6 +36,7 @@ suites += {
     'trace-ifd.sh',
     'build-time-flake-inputs.sh',
     'substitution.sh',
+    'shallow.sh',
   ],
   'workdir' : meson.current_source_dir(),
 }

tests/functional/flakes/shallow.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+export _NIX_FORCE_HTTP=1
+
+source ./common.sh
+
+requireGit
+
+createFlake1
+
+repoDir="$TEST_ROOT/repo"
+mkdir -p "$repoDir"
+echo "# foo" >> "$flake1Dir/flake.nix"
+git -C "$flake1Dir" commit -a -m bla
+
+cat > "$repoDir"/flake.nix <<EOF
+{
+  inputs.dep = {
+    type = "git";
+    url = "file://$flake1Dir";
+  };
+  outputs = inputs: rec {
+    revs = assert inputs.dep.number == 123; inputs.dep.revCount;
+  };
+}
+EOF
+
+# This will do a non-shallow fetch.
+[[ $(nix eval "path:$repoDir#revs") = 2 ]]
+
+# This should re-use the existing non-shallow clone.
+clearStore
+mv "$flake1Dir" "$flake1Dir.moved"
+[[ $(nix eval "path:$repoDir#revs") = 2 ]]