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#!/usr/bin/env bash
# SPDX-License-Identifier: LGPL-2.1-or-later
set -u
set -o pipefail
dir="${1:-.}"
version_tag="${2:-}"
if [ -n "${version_tag}" ]; then
# If -Dversion_tag= was used, just use that without further changes.
echo "${version_tag}"
else
read -r project_version <"${dir}/meson.version"
# Check that we have either .git/ (a normal clone) or a .git file (a work-tree)
# and that we don't get confused if a tarball is extracted in a higher-level
# git repository.
#
# If the working tree has no tags (CI builds), the first git-describe will fail
# and we fall back to project_version-commitid instead.
c=''
if [ -e "${dir}/.git" ]; then
c="$(git -C "$dir" describe --abbrev=7 --dirty=^ 2>/dev/null)"
if [ -n "$c" ]; then
# git describe uses the most recent tag. However, for development versions (e.g. v256~devel), the
# most recent tag will be v255 as there is no tag for development versions. To deal with this, we
# replace the tag with the project version instead.
c="${project_version}-${c#*-}"
else
# This call might still fail with permission issues
suffix="$(git -C "$dir" describe --always --abbrev=7 --dirty=^ 2>/dev/null)"
[ -n "$suffix" ] && c="${project_version}-${suffix}"
fi
fi
[ -z "$c" ] && c="${project_version}"
# Replace any hyphens with carets which are allowed in versions by pacman whereas hyphens are not. Git
# versions with carets will also sort higher than their non-git version counterpart both in pacman
# versioning and in version format specification versioning.
echo "$c" | sed 's/^v//; s/-/^/g'
fi
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