Rakefile

Encoding.default_external = "UTF-8" if defined?(Encoding)
require 'json'
require 'bundler/gem_tasks'

def version
  JSON.load(File.read('slick-lightbox/package.json'))['version']
end

task :submodule do
  sh 'git submodule update --init' unless File.exist?('slick-lightbox/README.md')
end

desc "Remove the app directory"
task :clean do
  rm_rf 'app'
  source_dir = 'slick-lightbox'
   %x( cd #{source_dir} && git reset --hard HEAD )
end

desc "Compile and minify the Javascript and CSS assets"
task :build_slick_lightbox => :submodule do
  source_dir = 'slick-lightbox'
  Rake.rake_output_message 'Installing npm dependencies...'
  %x( cd #{source_dir} && npm i )
  Rake.rake_output_message 'Compiling...'
  %x( cd #{source_dir} && gulp build )
end

desc "Update Slick::Lightbox::Rails::SLICK_LIGHTBOX_VERSION"
task :version => :submodule do
  Rake.rake_output_message "Setting Slick::Lightbox::Rails::SLICK_LIGHTBOX_VERSION = \"#{version}\""

  versionRb = 'lib/slick/lightbox/rails/version.rb'
  versionRbSource = File.read(versionRb)
  versionDefinition = "SLICK_LIGHTBOX_VERSION = \"#{version}\""
  versionRbSource.sub! /SLICK_LIGHTBOX_VERSION = "[^"]*"/, versionDefinition \
    or fail "Could not find SLICK_LIGHTBOX_VERSION in #{versionRb}"
  File.open(versionRb, 'w') do |out|
    out.write(versionRbSource)
  end
end

desc "Move the build assets to the app dir"
task :move_to_app_dir => :build_slick_lightbox do
  Rake.rake_output_message 'Moving built files...'
  target_dir_js = 'app/assets/javascripts/slick-lightbox'
  target_dir_css = 'app/assets/stylesheets/slick-lightbox'

  mkdir_p target_dir_js
  mkdir_p target_dir_css

  FileUtils.cp(Dir.glob("slick-lightbox/dist/*.js"), target_dir_js)
  FileUtils.cp(Dir.glob("slick-lightbox/dist/*.css"), target_dir_css)
end

desc "Generate root files"
task :generate_root_files => :move_to_app_dir do
  Rake.rake_output_message 'Generating root files...'
  target_js_file='app/assets/javascripts/slick-lightbox.js'
  target_css_file='app/assets/stylesheets/slick-lightbox.css'

  File.open(target_js_file, 'w') do |out|
    out.write('//= require slick-lightbox/slick-lightbox')
  end

  File.open(target_css_file, 'w') do |out|
    out.write('//= require slick-lightbox/slick-lightbox')
  end
end

desc "Clean and then generate everything (default)"
task :assets => [:clean, :generate_root_files, :version]

task :build => :assets

task :default => :assets