require 'bundler'

PACKAGE_NAME = '<%= options[:name] %>'
VERSION = '0.1.0'
RUBY_V = '2.2'
TRAVELING_RUBY_VERSION = "20150715-#{RUBY_V}.2"

desc 'Package your app'
task package: ['package:linux:x86', 'package:linux:x86_64', 'package:osx']

namespace :package do
  namespace :linux do
    desc 'Package your app for Linux x86'
    task :x86 => "packaging/traveling-ruby-#{TRAVELING_RUBY_VERSION}-linux-x86.tar.gz" do
      create_package('linux-x86')
    end

    desc 'Package your app for Linux x86_64'
    task :x86_64 => "packaging/traveling-ruby-#{TRAVELING_RUBY_VERSION}-linux-x86_64.tar.gz" do
      create_package('linux-x86_64')
    end
  end

  desc 'Package your app for OS X'
  task :osx do
    create_package('osx')
  end

end

def create_package(target)
  if RUBY_VERSION !~ /^#{RUBY_V}\./
    abort "You can only use Ruby #{RUBY_V}, because that's what Traveling Ruby uses."
  end
  package_dir = "#{PACKAGE_NAME}-#{VERSION}-#{target}"
  sh "rm -rf #{package_dir}"
  sh "rm -rf tmp/"
  sh "mkdir tmp"
  sh "mkdir -p #{package_dir}/lib/ruby"
  sh "rsync -a src #{package_dir}/lib"
  download_runtime('osx')
  sh "tar -xzf tmp/traveling-ruby-#{TRAVELING_RUBY_VERSION}-#{target}.tar.gz -C #{package_dir}/lib/ruby"
  create_wrapper("#{package_dir}/#{PACKAGE_NAME}")
  sh "chmod 755 #{package_dir}/#{PACKAGE_NAME}"
  bundle_install
  sh "cp -pR tmp/vendor #{package_dir}/lib/"
  sh "cp src/Gemfile src/Gemfile.lock #{package_dir}/lib/vendor/"
  sh "mkdir #{package_dir}/lib/vendor/.bundle"
  sh "cp tmp/bundler-config #{package_dir}/lib/vendor/.bundle/config"
  if !ENV['DIR_ONLY']
    sh "tar -czf #{package_dir}.tar.gz #{package_dir}"
    sh "rm -rf #{package_dir}"
  end
  sh "rm -rf tmp/"
end

def download_runtime(target)
  sh "cd tmp && curl -L -O --fail https://d6r77u77i8pq3.cloudfront.net/releases/traveling-ruby-#{TRAVELING_RUBY_VERSION}-#{target}.tar.gz"
end

def bundle_install
  sh "cp src/Gemfile src/Gemfile.lock tmp/"
  Bundler.with_clean_env do
    sh "cd tmp && env BUNDLE_IGNORE_CONFIG=1 bundle install --path vendor --without development"
<% if options[:development] -%>
    sh "cd tmp && env BUNDLE_IGNORE_CONFIG=1 bundle package --all"
    sh "mv tmp/vendor/cache/neutron tmp/vendor/ruby/#{RUBY_V}.0/gems"
<% end -%>
  end
  sh "rm -rf tmp/vendor/cache"
  sh "rm -rf tmp/vendor/ruby/#{RUBY_V}.0/cache"
  bundle_config = <<-CONFIG
    BUNDLE_PATH: .
    BUNDLE_WITHOUT: development
    BUNDLE_DISABLE_SHARED_GEMS: '1'
  CONFIG
  File.open('tmp/bundler-config', 'w') {|f| f << bundle_config.gsub(/^\s{4}/, '') }
end

def create_wrapper(out)
  wrapper = <<-WRAPPER
    #!/bin/bash
    set -e

    SELFDIR="`dirname \"$0\"`"
    SELFDIR="`cd \"$SELFDIR\" && pwd`"

    export BUNDLE_GEMFILE="$SELFDIR/lib/vendor/Gemfile"
    unset BUNDLE_IGNORE_CONFIG

    exec "NODE_ENV=production $SELFDIR/lib/ruby/bin/ruby" -rbundler/setup "$SELFDIR/lib/src/main.rb"
  WRAPPER
  File.open(out, 'w') {|f| f << wrapper.gsub(/^\s{4}/, '') }
end