#!/bin/sh

set -euf

DIR=${1:-}

CMD=${2:-}

if [ x$DIR = "x" ]

then

DIR="."

fi

if test -d "${DIR}/.git"; then

#

# Locate the closest annotated tag

#

REVISION="$(git describe --abbrev=0 --tags 2>/dev/null || echo unknown)"

#

# Determine if we are a development branch, if so then append the

# short SHA1.

#

EXACTLY="$(git describe --abbrev=0 --tags --exact-match 2>/dev/null || echo)"

if test -z "$EXACTLY"; then

REVISION="${REVISION}_rev-$(git rev-parse --verify --short HEAD)"

fi

elif test -d "${DIR}/.svn"; then

REVISION="_r$(svnversion $DIR 2> /dev/null | sed 's/[^0-9]*//g')"

if test x$REVISION = "x"; then

REVISION="_r$(svn info $DIR 2> /dev/null | grep -i revision | sed 's/[^0-9]*//g')"

fi

if test x$REVISION = "x"; then

if test -f "${DIR}/.svn/entries"; then

REVISION="_r$(cat ${DIR}/.svn/entries | grep -i revision | head -n 1 | sed 's/[^0-9]*//g')"

fi

fi

if test x$REVISION = "x"; then

REVISION="_r1"

fi

else

REVISION="$(cat ${DIR}/VERSION)"

fi

if test "x$CMD" = "xquoted"; then

echo \"$REVISION\"

else

echo $REVISION

fi