nix-bitcoin/test/lib/create-git-repo.sh

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# Create and maintain a minimal git repo at the root of the copied src
(
# shellcheck disable=SC2154,SC2164
cd "$scriptDir/.."
amend=(--amend)
if [[ ! -e .git ]] || ! git rev-parse HEAD 2>/dev/null; then
git init
amend=()
fi
git add .
if ! git diff --quiet --cached; then
git commit -a "${amend[@]}" -m -
fi
) >/dev/null