Class: Jets::Builders::GemReplacer

Inherits:
Object
  • Object
show all
Extended by:
Memoist
Defined in:
lib/jets/builders/gem_replacer.rb

Instance Method Summary collapse

Constructor Details

#initialize(ruby_version, options) ⇒ GemReplacer

Returns a new instance of GemReplacer.



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# File 'lib/jets/builders/gem_replacer.rb', line 4

def initialize(ruby_version, options)
  @ruby_version = ruby_version
  @options = options
end

Instance Method Details

#move_opt_gems_to_vendor ⇒ Object 



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# File 'lib/jets/builders/gem_replacer.rb', line 28

def move_opt_gems_to_vendor
  code = "#{Jets.build_root}/stage/code"
  opt_gems = "#{code}/opt/ruby/gems/#{Jets::Gems.ruby_folder}"
  vendor_gems = "#{code}/vendor/bundle/ruby/#{Jets::Gems.ruby_folder}"
  # https://stackoverflow.com/questions/23698183/how-to-force-cp-to-overwrite-directory-instead-of-creating-another-one-inside
  # Trailing slashes are required
  sh "rsync -a --links #{opt_gems}/ #{vendor_gems}/"
  # clean up opt compiled gems
  FileUtils.rm_rf("#{code}/opt/ruby")
end

#run ⇒ Object 



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# File 'lib/jets/builders/gem_replacer.rb', line 9

def run
  check = Jets::Gems::Check.new
  found_gems = check.run! # exits early if missing gems found

  # Reaching here means its safe to download and extract the gems
  found_gems.each do |gem_name, source|
    options = @options.merge(source_url: source)
    gem_extractor = Jets::Gems::Extract::Gem.new(gem_name, options)
    gem_extractor.run
  end

  # At this point the current compiled gems have been removed and compiled gems
  # have been unpacked to code/opt. We can take the unpacked gems in opt and fully
  # move them into vendor/bundle gems now.
  move_opt_gems_to_vendor

  tidy
end

#sh(command) ⇒ Object 



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# File 'lib/jets/builders/gem_replacer.rb', line 39

def sh(command)
  puts "=> #{command}".colorize(:green)
  success = system(command)
  abort("Command Failed") unless success
  success
end

#tidy ⇒ Object

remove unnecessary files to reduce package size



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# File 'lib/jets/builders/gem_replacer.rb', line 47

def tidy
  # project_root: /tmp/jets/demo/stage/code/
  # /tmp/jets/demo/stage/code/bundled
  tidy_gems("#{@options[:project_root]}/bundled/gems/ruby/*/gems/*")
  tidy_gems("#{@options[:project_root]}/bundled/gems/ruby/*/bundler/gems/*")
end

#tidy_gem(path) ⇒ Object

Clean up some unneeded files to try to keep the package size down In a generated jets app this made a decent 9% difference:

175M test2
191M test3



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# File 'lib/jets/builders/gem_replacer.rb', line 64

def tidy_gem(path)
  # remove top level tests and cache folders
  Dir.glob("#{path}/*").each do |path|
    next unless File.directory?(path)
    folder = File.basename(path)
    if %w[test tests spec features benchmark cache doc].include?(folder)
      FileUtils.rm_rf(path)
    end
  end

  Dir.glob("#{path}/**/*").each do |path|
    next unless File.file?(path)
    ext = File.extname(path)
    if %w[.rdoc .md .markdown].include?(ext) or
       path =~ /LICENSE|CHANGELOG|README/
      FileUtils.rm_f(path)
    end
  end
end

#tidy_gems(gems_path) ⇒ Object 



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# File 'lib/jets/builders/gem_replacer.rb', line 54

def tidy_gems(gems_path)
  Dir.glob(gems_path).each do |gem_path|
    tidy_gem(gem_path)
  end
end