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