Determines whenever to run install, update or simply skip...

composer-install-update.sh

#!/bin/sh

# @author: Carlos A. Bertholdo Carucce
# <https://github.com/carloscarucce>

if [[ ! -f "composer.json" ]]; then
  echo "[Composer] composer.json was not found" >&2
  exit 1;
fi

if [[ -f "composer.lock" ]] && [[ -d "vendor" ]]; then
  if [[ composer.json -nt composer.lock ]]; then
    echo "[Composer] Updating dependencies: "
    composer update --no-interaction
  else
    echo "[Composer] Nothing to install or update..."
  fi
else
  echo "[Composer] Installing dependencies: "
  composer install --no-interaction
fi

docker-compose.yml

# Example usage with Docker Compose
version: "1.0"
services:
  composer:
    image: composer:latest
    volumes:
      - ./:/app
    working_dir: /app
    command: ./composer-bootstrap.sh