install

#!/usr/bin/env ruby
require 'fileutils'

FILES = %w[
  .docker.env
  DEVELOPMENT.DOCKER.md
  bin
  config
  development.docker
  docker-compose.yml
]
HELP_MESSAGE = <<-HLP

Usage: ../docker-rails-development/install

Run this script to copy Docker files into current directory

HLP

if ARGV.include?('-h') || ARGV.include?('--help')
  puts HELP_MESSAGE
  exit
end

source_directory      = File.dirname File.expand_path __FILE__
destination_directory = Dir.pwd

if destination_directory == source_directory
  puts "Error: doesn't make sense to copy files into the same directory"
  puts HELP_MESSAGE
  exit 1
end

# Copy files
source_paths = FILES.map { |file_name| File.join source_directory, file_name }
FileUtils.cp_r source_paths, destination_directory, verbose: true

# Copy docker-sync.yml
# Set project name in container name in docker-sync.yml
# Generating project name like Docker Compose does:
#   https://github.com/docker/compose/blob/520f5d0fdece26862c622c33007775400a9b9000/compose/cli/command.py#L132
project_name     = File.basename(Dir.getwd).downcase.gsub(/[^-_a-z0-9]/, '')
template_path    = File.join source_directory, 'docker-sync.yml.erb'
template         = File.read template_path
rendered         = template.gsub '<%= project_name %>', project_name
destination_path = File.join destination_directory, 'docker-sync.yml'

unless File.exist? destination_path
  File.write destination_path, rendered
  puts "Rendered #{template_path} to #{destination_path}"
else
  puts "Skipping #{destination_path}, it already exists"
end