1#!/usr/bin/env bash
2# SPDX-License-Identifier: LGPL-2.1-or-later
3
4set -eu
5set -o pipefail
6
7dir="${1:?}"
8fallback="${2:?}"
9
10# Apparently git describe has a bug where it always considers the work-tree
11# dirty when invoked with --git-dir (even though 'git status' is happy). Work
12# around this issue by cd-ing to the source directory.
13cd "$dir"
14# Check that we have either .git/ (a normal clone) or a .git file (a work-tree)
15# and that we don't get confused if a tarball is extracted in a higher-level
16# git repository.
17[ -e .git ] && git describe --abbrev=7 --dirty=+ 2>/dev/null | sed 's/^v//' || echo "$fallback"
18