DevUp!

devup

#!/usr/bin/env ruby

require "yaml"
require "ostruct"

class Service
  attr_reader :compose, :name
  def initialize(compose, name)
    @name = name
    @compose = compose
  end

  def ports
    compose.service(name)["ports"].map { |el| el.split(":")[-1] }.map do |from|
      OpenStruct.new(
        from: from,
        to: compose.command("port #{name} #{from}").split(":")[-1].strip
      )
    end
  end
end

class Compose
  attr_reader :compose_path, :project

  def initialize(compose_path = "docker-compose.yml", project: "devup")
    @compose_path = compose_path
    @project = project
  end

  def config
    YAML.safe_load(File.read(compose_path))
  end

  def up
    command "up -d"
  end

  def service(name)
    config["services"][name]
  end

  def command(cmd)
    `docker-compose -p #{project} -f #{compose_path} #{cmd}`
  end
end

class Environment
  attr_reader :compose

  def initialize
    @compose = Compose.new
  end

  def up
    compose.up
  end

  def services
    @compose.config["services"].map do |name, conf|
      Service.new compose, name
    end
  end

  def dotenv
    services.map { |service|
      service.ports.map { |port|
        "#{service.name}_PORT_#{port.from}=#{port.to}".upcase
      }.join("\n")
    }.join("\n\n") + "\n"
  end
end

env = Environment.new
env.up

File.open(".env.services", "w") { |f| f.write env.dotenv }