Install docker-compose

install-docker-compose

#!/bin/sh

set -eu

PROGNAME=$(basename $0)
BASEDIR=$(cd $(dirname $0); pwd)

BRANCH=
INSTALL_DIR=/usr/local/bin
CLEAN=no

if [ "$(uname)" != Linux ] || id -nG | grep -q docker; then
    DOCKER='docker'
else
    DOCKER='sudo docker'
fi

help() {
    cat <<EOF >&2
Usage: $PROGNAME [options]

Help Options:
  -h, --help

Options:
  -b, --branch <BRANCH> (Required)
    Branch to be cloned.

  -c, --clean
    Remove Docker images used for building docker-compose.

  -i, --install-dir <DIR> (Default: $INSTALL_DIR)
    Path to directory where docker-compose is copied.
EOF
    exit 0
}

error() {
    echo "$1" >&2
    exit 1
}

clean() {
    if [ "$CLEAN" = yes ]; then
        $DOCKER rmi docker-compose
        cat /tmp/compose/Dockerfile | grep -e '^FROM' | cut -d ' ' -f2 | xargs $DOCKER rmi
    fi

    rm -rf /tmp/compose
}

for OPT in "$@"
do
    case $OPT in
        '-h' | '--help')
            help
            ;;
        '-b' | '--branch')
            BRANCH="$2"
            shift 2
            ;;
        '-c' | '--clean')
            CLEAN=yes
            shift
            ;;
        '-i' | '--install-dir')
            INSTALL_DIR=$(cd "$2"; pwd)
            shift 2
            ;;
    esac
done

if [ -z "$BRANCH" ]; then
    error "--branch is required"
fi

trap "clean" EXIT

git clone --depth=1 -b $BRANCH https://github.com/docker/compose.git /tmp/compose

(cd /tmp/compose \
 && $DOCKER build -t docker-compose . \
 && $DOCKER run --rm --entrypoint=script/build/linux-entrypoint \
      -v $(pwd)/dist:/code/dist -v $(pwd)/.git:/code/.git docker-compose \
 && sudo cp dist/docker-compose-Linux-$(arch) "$INSTALL_DIR/docker-compose")