Class: Jets::Builders::RubyPackager

Inherits:
Object
  • Object
show all
Includes:
Util
Defined in:
lib/jets/builders/ruby_packager.rb

Direct Known Subclasses

RackPackager

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(relative_app_root) ⇒ RubyPackager

Returns a new instance of RubyPackager.



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# File 'lib/jets/builders/ruby_packager.rb', line 8

def initialize(relative_app_root)
  @full_app_root = "#{build_area}/#{relative_app_root}"
end

Instance Attribute Details

#full_app_root ⇒ Object (readonly)

Returns the value of attribute full_app_root.



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# File 'lib/jets/builders/ruby_packager.rb', line 7

def full_app_root
  @full_app_root
end

Instance Method Details

#bundle_install ⇒ Object

Installs gems on the current target system: both compiled and non-compiled. If user is on a macosx machine, macosx gems will be installed. If user is on a linux machine, linux gems will be installed.

Copies Gemfile* to /tmp/jets/demo/cache folder and installs gems with bundle install from there.

We take the time to copy Gemfile and bundle into a separate directory because it gets left around to act as a ‘cache’. So, when the builds the project gets built again not all the gems from get installed from the beginning.



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# File 'lib/jets/builders/ruby_packager.rb', line 44

def bundle_install
  full_project_path = @full_app_root
  headline "Bundling: running bundle install in cache area: #{cache_area}."

  copy_gemfiles(full_project_path)

  # Uncomment out to always remove the cache/vendor/gems to debug
  # FileUtils.rm_rf("#{cache_area}/vendor/gems")

  require "bundler" # dynamically require bundler so user can use any bundler
  Bundler.with_clean_env do
    sh(
      "cd #{cache_area} && " \
      "env BUNDLE_IGNORE_CONFIG=1 bundle install --path #{cache_area}/vendor/gems --without development test"
    )
  end

  remove_bundled_with("#{cache_area}/Gemfile.lock")

  # Copy the Gemfile.lock back to the project in case it was updated.
  # For example we add the jets-rails to the Gemfile.
  copy_back_gemfile_lock

  puts 'Bundle install success.'
end

#clean_old_submodules ⇒ Object

When using submodules, bundler leaves old submodules behind. Over time this inflates the size of the the cache gems. So we’ll clean it up.



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# File 'lib/jets/builders/ruby_packager.rb', line 99

def clean_old_submodules
  # https://stackoverflow.com/questions/38800129/parsing-a-gemfile-lock-with-bundler
  lockfile = "#{cache_area}/Gemfile.lock"
  return unless File.exist?(lockfile)

  return if Bundler.bundler_major_version <= 1 # LockfileParser only works for Bundler version 2+

  parser = Bundler::LockfileParser.new(Bundler.read_file(lockfile))
  specs = parser.specs

  # specs = Bundler.load.specs
  # IE: spec.source.to_s: "https://github.com/tongueroo/webpacker.git (at jets@a8c4661)"
  submoduled_specs = specs.select do |spec|
    spec.source.to_s =~ /@\w+\)/
  end

  # find git shas to keep
  # IE: ["a8c4661", "abc4661"]
  git_shas = submoduled_specs.map do |spec|
    md = spec.source.to_s.match(/@(\w+)\)/)
    md[1] # git_sha
  end

  # IE: /tmp/jets/demo/cache/vendor/gems/ruby/2.5.0/bundler/gems/webpacker-a8c46614c675
  Dir.glob("#{cache_area}/vendor/gems/ruby/2.5.0/bundler/gems/*").each do |path|
    sha = path.split('-').last[0..6] # only first 7 chars of the git sha
    unless git_shas.include?(sha)
      # puts "Removing old submoduled gem: #{path}" # uncomment to see and debug
      FileUtils.rm_rf(path) # REMOVE old submodule directory
    end
  end
end

#copy_back_gemfile_lock ⇒ Object 



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# File 'lib/jets/builders/ruby_packager.rb', line 70

def copy_back_gemfile_lock
  src = "#{cache_area}/Gemfile.lock"
  dest = "#{@full_app_root}/Gemfile.lock"
  FileUtils.cp(src, dest)
end

#copy_cache_gems ⇒ Object 



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# File 'lib/jets/builders/ruby_packager.rb', line 194

def copy_cache_gems
  vendor_gems = "#{@full_app_root}/vendor/gems"
  if File.exist?(vendor_gems)
    puts "Removing current vendor_gems from project"
    FileUtils.rm_rf(vendor_gems)
  end
  # Leave #{Jets.build_root}/vendor_gems behind to act as cache
  if File.exist?("#{cache_area}/vendor/gems")
    FileUtils.mkdir_p(File.dirname(vendor_gems))
    Jets::Util.cp_r("#{cache_area}/vendor/gems", vendor_gems)
  end
end

#copy_gemfiles(full_project_path) ⇒ Object 



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# File 'lib/jets/builders/ruby_packager.rb', line 132

def copy_gemfiles(full_project_path)
  FileUtils.mkdir_p(cache_area)
  FileUtils.cp("#{full_project_path}/Gemfile", "#{cache_area}/Gemfile")

  gemfile_lock = "#{full_project_path}/Gemfile.lock"
  dest = "#{cache_area}/Gemfile.lock"
  return unless File.exist?(gemfile_lock)

  FileUtils.cp(gemfile_lock, dest)
end

#ensure_build_cache_bundle_config_exists! ⇒ Object

On circleci the “#Jets.build_root/.bundle/config” doesnt exist this only happens with ssh debugging, not when the ci.sh script gets ran. But on macosx it exists. Dont know why this is the case.



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# File 'lib/jets/builders/ruby_packager.rb', line 182

def ensure_build_cache_bundle_config_exists!
  text =<<-EOL
---
BUNDLE_FROZEN: "true"
BUNDLE_PATH: "vendor/gems"
BUNDLE_WITHOUT: "development:test"
EOL
  bundle_config = "#{cache_area}/.bundle/config"
  FileUtils.mkdir_p(File.dirname(bundle_config))
  IO.write(bundle_config, text)
end

#finish ⇒ Object

build gems in vendor/gems/ruby/2.5.0 (done in install phase)



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# File 'lib/jets/builders/ruby_packager.rb', line 23

def finish
  return unless gemfile_exist?
  tidy
end

#gemfile_exist? ⇒ Boolean

Returns:

  • (Boolean) 


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

def gemfile_exist?
  gemfile_path = "#{@full_app_root}/Gemfile"
  File.exist?(gemfile_path)
end

#install ⇒ Object 



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# File 'lib/jets/builders/ruby_packager.rb', line 12

def install
  return unless gemfile_exist?

  reconfigure_ruby_version
  clean_old_submodules
  bundle_install
  setup_bundle_config
  copy_cache_gems
end

#reconfigure_ruby_version ⇒ Object

This is in case the user has a 2.5.x variant. Force usage of ruby version that jets supports The lambda server only has ruby 2.5.0 installed.



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# File 'lib/jets/builders/ruby_packager.rb', line 92

def reconfigure_ruby_version
  ruby_version = "#{@full_app_root}/.ruby-version"
  IO.write(ruby_version, Jets::RUBY_VERSION)
end

#remove_bundled_with(gemfile_lock) ⇒ Object

Remove the BUNDLED WITH line since we don’t control the bundler gem version on AWS Lambda And this can cause issues with require ‘bundler/setup’



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# File 'lib/jets/builders/ruby_packager.rb', line 145

def remove_bundled_with(gemfile_lock)
  lines = IO.readlines(gemfile_lock)

  # amount is the number of lines to remove
  new_lines, capture, count, amount = [], true, 0, 2
  lines.each do |l|
    capture = false if l.include?('BUNDLED WITH')
    if capture
      new_lines << l
    end
    if capture == false
      count += 1
      capture = count > amount # renable capture
    end
  end

  content = new_lines.join('')
  IO.write(gemfile_lock, content)
end

#setup_bundle_config ⇒ Object 



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# File 'lib/jets/builders/ruby_packager.rb', line 165

def setup_bundle_config
  ensure_build_cache_bundle_config_exists!

  # Override project's .bundle/config and ensure that .bundle/config matches
  # at these 2 spots:
  #   app_root/.bundle/config
  #   vendor/gems/.bundle/config
  cache_bundle_config = "#{cache_area}/.bundle/config"
  app_bundle_config = "#{@full_app_root}/.bundle/config"
  FileUtils.mkdir_p(File.dirname(app_bundle_config))
  FileUtils.cp(cache_bundle_config, app_bundle_config)
end

#tidy ⇒ Object

Clean up extra unneeded files to reduce package size Because we’re removing files (something dangerous) use full paths.



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# File 'lib/jets/builders/ruby_packager.rb', line 78

def tidy
  puts "Tidying project: removing ignored files to reduce package size."
  tidy_project(@full_app_root)
  # The rack sub project has it's own gitignore.
  tidy_project(@full_app_root+"/rack")
end

#tidy_project(path) ⇒ Object 



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# File 'lib/jets/builders/ruby_packager.rb', line 85

def tidy_project(path)
  Tidy.new(path).cleanup!
end