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path: root/nixos/modules/installer/tools/get-version-suffix
blob: b8972cd57d22b933a0084203df8d6ee5a94271ee (plain) (blame)
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getVersion() {
    local dir="$1"
    rev=
    if [ -e "$dir/.git" ]; then
        if [ -z "$(type -P git)" ]; then
            echo "warning: Git not found; cannot figure out revision of $dir" >&2
            return
        fi
        cd "$dir"
        rev=$(git rev-parse --short HEAD)
        if git describe --always --dirty | grep -q dirty; then
            rev+=M
        fi
    fi
}

if nixpkgs=$(nix-instantiate --find-file nixpkgs "$@"); then
    getVersion $nixpkgs
    if [ -n "$rev" ]; then
        echo ".git.$rev"
    fi
fi