onion/git-version-gen at master · Laughter79/onion · GitHub

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#!/bin/sh

# usage: git-version-gen [srcdir]

DEF_VER="v0.8.0.GIT"

LF='
'

srcdir="."
if test "x${1}" != "x"
then
	srcdir="${1}"
fi

# First see if there is a version file (included in release tarballs),
# then try git-describe, then default.
cd "${srcdir}" || exit 1
if test -f version
then
	VN="`cat version`" || VN="${DEF_VER}"
elif test -d .git -o -f .git &&
	VN="`git describe --match "v[0-9]*" --tags --abbrev=5 HEAD 2>/dev/null`" &&
	case "${VN}" in
	*"${LF}"*) (exit 1) ;;
	v[0-9]*)
		git update-index -q --refresh
		test -z "`git diff-index --name-only HEAD --`" ||
		VN="${VN}-dirty" ;;
	esac
then
	# convert "v0.4.0-32-gf350f" to "v0.4.0.git32.f350f"
	VN="`echo "${VN}" | sed -e 's/-\([0-9]*\)-g/.\1./g' -e 's/-/./g'`";
else
	VN="${DEF_VER}"
fi

VN="`expr "${VN}" : v*'\(.*\)'`"

echo "${VN}" | tr -d "$LF"