run-tests: make `nixosSearch` compatible with `--copy-src`

test/lib/copy-src.sh

@@ -15,4 +15,4 @@ trap "atExit" EXIT
 
 rsync -a --delete --exclude='.git*' "$scriptDir/../" $tmp/src
 echo "Copied src"
-_nixBitcoinInCopySrc=1 $tmp/src/test/run-tests.sh "${args[@]}"
+_nixBitcoinInCopiedSrc=1 $tmp/src/test/run-tests.sh "${args[@]}"

test/lib/create-git-repo.sh

@@ -0,0 +1,13 @@
+# Create and maintain a minimal git repo at the root of the copied src
+(
+  cd "$scriptDir/.."
+  amend=--amend
+  if [[ ! -e .git ]]; then
+    git init
+    amend=
+  fi
+  git add .
+  if ! git diff --quiet --cached; then
+    git commit -a $amend -m -
+  fi
+) >/dev/null

test/run-tests.sh

@@ -95,7 +95,7 @@ while :; do
             ;;
         --copy-src|-c)
             shift
-            if [[ ! $_nixBitcoinInCopySrc ]]; then
+            if [[ ! $_nixBitcoinInCopiedSrc ]]; then
                 . "$scriptDir/lib/copy-src.sh"
                 exit
             fi
@@ -271,12 +271,17 @@ flake() {
 nixosSearch() {
     if ! checkFlakeSupport "nixosSearch"; then return; fi
 
+    if [[ $_nixBitcoinInCopiedSrc ]]; then
+      # flake-info requires that its target flake is under version control
+      . "$scriptDir/lib/create-git-repo.sh"
+    fi
+
     if [[ $outLinkPrefix ]]; then
         # Add gcroots for flake-info
         nix build $scriptDir/nixos-search#flake-info -o "$outLinkPrefix-flake-info"
     fi
     echo "Running flake-info (nixos-search)"
-    nix run $scriptDir/nixos-search#flake-info -- flake ../.
+    nix run $scriptDir/nixos-search#flake-info -- flake "$scriptDir/.."
 }
 
 # A basic subset of tests to keep the total runtime within