Docker-compose installer

docker-compose-install.sh

#!/bin/sh -e

PREFIX=${PREFIX:-/usr}
NAME=${NAME:-docker-compose}
DOCKERCOMPOSE_VERSION=${DOCKERCOMPOSE_VERSION:-1.1.0}

VENV_PATH="${PREFIX}/${NAME}"
VIRTUALENV=${VIRTUALENV:-virtualenv}

if ! [ -d "$PREFIX" ] ; then
    echo "Error: work directory '$PREFIX' does not exist. Abort." >&2
    exit 1
elif [ -d "$VENV_PATH" ] ; then
    echo "Error: docker-compose virtualenv directory already exists: '$VENV_PATH'. Abort."
    exit 1
fi

echo "checking tool virtualenv: "
${VIRTUALENV} --version

${VIRTUALENV} ${VENV_PATH}
. ${VENV_PATH}/bin/activate

pip install "requests==2.4.3"
pip install "docker-compose==${DOCKERCOMPOSE_VERSION}"

cat <<EOF
docker-compose has been installed, version: `docker-compose --version`

You should add a DOCKER_COMPOSE environment variable
in your favorite shell configuration:
Bourne shell
------------
export DOCKER_COMPOSE="`which docker-compose`"

C-Shell
-------
setenv DOCKER_COMPOSE "`which docker-compose`"
EOF