headscale/scripts/version-at-commit.sh
2021-08-24 07:49:15 -06:00

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#!/usr/bin/env bash
set -e -o pipefail
commit="$1"
versionglob="v[0-9].[0-9]*.[0-9]*"
devsuffix=".dev"
if [ -z "$commit" ]; then
commit=`git log -n1 --first-parent "--format=format:%h"`
fi
# automatically assign version
#
# handles the following cases:
#
# 0. no tags on the repository. Print "dev".
#
# 1. no local modifications and commit is directly tagged. Print tag.
#
# 2. no local modifications and commit is not tagged. Take greatest version tag in repo X.Y.Z and assign X.Y.(Z+1). Print that + $devsuffix + $timestamp.
#
# 3. local modifications. Print "dev".
tags=$(git tag)
if [[ -z "$tags" ]]; then
echo "dev"
elif `git diff --quiet 2>/dev/null`; then
tagged=$(git tag --points-at "$commit")
if [[ -n "$tagged" ]] ; then
echo $tagged
else
nearest_tag=$(git describe --tags --abbrev=0 --match "$versionglob" "$commit")
v=$(echo $nearest_tag | perl -pe 's/(\d+)$/$1+1/e')
isodate=$(TZ=UTC git log -n1 --format=%cd --date=iso "$commit")
ts=$(TZ=UTC date --date="$isodate" "+%Y%m%d%H%M%S")
echo "${v}${devsuffix}${ts}"
fi
else
echo "dev"
fi