Easily install or upgrade docker-compose on any system!

install-docker-compose.sh

#!/bin/sh

COMPOSE_PATH="/usr/local/bin/docker-compose"

if `command -v "docker-compose" >/dev/null 2>&1`; then
  CURRENT_VERSION=`docker-compose -v | sed 's|.*version \([0-9\.]*\).*|\1|'`
  if [[ ! -f "$COMPOSE_PATH" ]]; then
    echo "WARNING"
    echo "Looks like docker-compose is not residing in $COMPOSE_PATH"
    echo "This is OK, but make sure that your path variable has /usr/local/bin first to make sure you are running the latest"
    echo 'e.g. export PATH="$PATH:/usr/local/bin"'
    echo
  fi
else
  CURRENT_VERSION=""
fi

get_latest_release() {
  curl --silent "https://api.github.com/repos/$1/releases/latest" | # Get latest release from GitHub api
    grep '"tag_name":' |                                            # Get tag line
    sed -E 's/.*"([^"]+)".*/\1/'                                    # Pluck JSON value
}

echo "Checking for latest docker-compose version..."
COMPOSE_RELEASE=`get_latest_release "docker/compose"`

if [[ "$CURRENT_VERSION" == "$COMPOSE_RELEASE" ]]; then
  echo "You already have compose installed and it is the latest version ($CURRENT_VERSION)"
  exit 0
elif [[ "$CURRENT_VERSION" == "" ]]; then
  echo "Compose is not installed. Downloading latest version $COMPOSE_RELEASE"
else
  echo "Compose is isntalled but it is an old version ($CURRENT_VERSION). Upgrading latest version $COMPOSE_RELEASE"
fi
curl -L https://github.com/docker/compose/releases/download/${COMPOSE_RELEASE}/docker-compose-`uname -s`-`uname -m` -o "$COMPOSE_PATH"
chmod +x "$COMPOSE_PATH"