Move flake-searching.sh and make it less dependent on git

tests/flakes/search-root.sh

@@ -1,15 +1,11 @@
 source common.sh
 
-if [[ -z $(type -p git) ]]; then
-    echo "Git not installed; skipping flake search tests"
-    exit 99
-fi
-
 clearStore
 
-cp ./simple.nix ./simple.builder.sh ./config.nix $TEST_HOME
+writeSimpleFlake $TEST_HOME
 cd $TEST_HOME
 mkdir -p foo/subdir
+
 echo '{ outputs = _: {}; }' > foo/flake.nix
 cat <<EOF > flake.nix
 {
@@ -43,10 +39,12 @@ nix build --override-input foo . || fail "flake should search up directories whe
 sed "s,$PWD/foo,$PWD/foo/subdir,g" -i flake.nix
 ! nix build || fail "flake should not search upwards when part of inputs"
 
-pushd subdir
-git init
-for i in "${success[@]}" "${failure[@]}"; do
+if [[ -n $(type -p git) ]]; then
+    pushd subdir
+    git init
+    for i in "${success[@]}" "${failure[@]}"; do
         ! nix build $i || fail "flake should not search past a git repository"
-done
-rm -rf .git
-popd
+    done
+    rm -rf .git
+    popd
+fi

tests/local.mk

@@ -49,7 +49,7 @@ nix_tests = \
   secure-drv-outputs.sh \
   restricted.sh \
   fetchGitSubmodules.sh \
-  flake-searching.sh \
+  flakes/search-root.sh \
   ca/duplicate-realisation-in-closure.sh \
   readfile-context.sh \
   nix-channel.sh \