Class: Jets::Builders::CodeBuilder

Inherits:
Object
  • Object
show all
Extended by:
Memoist
Includes:
AwsServices, Util
Defined in:
lib/jets/builders/code_builder.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Util

#code_area, #full, #headline, #sh

Methods included from AwsServices

#apigateway, #cfn, #lambda, #logs, #s3, #s3_resource, #sns, #sts

Methods included from AwsServices::StackStatus

#lookup, #stack_exists?, #stack_in_progress?

Constructor Details

#initialize ⇒ CodeBuilder

Returns a new instance of CodeBuilder.



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# File 'lib/jets/builders/code_builder.rb', line 22

def initialize
  # Expanding to the full path and capture now.
  # Dir.chdir gets called later and we'll lose this info.
  @full_project_path = File.expand_path(Jets.root) + "/"
  @version_purger = Purger.new
end

Instance Attribute Details

#full_project_path ⇒ Object (readonly)

Returns the value of attribute full_project_path.



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# File 'lib/jets/builders/code_builder.rb', line 21

def full_project_path
  @full_project_path
end

Class Method Details

.tmp_code ⇒ Object

Group all the path settings together here



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# File 'lib/jets/builders/code_builder.rb', line 341

def self.tmp_code
  Jets::Commands::Build.tmp_code
end

Instance Method Details

#build ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 29

def build
  check_ruby_version
  @version_purger.purge
  cache_check_message

  clean_start
  compile_assets # easier to do before we copy the project because node and yarn has been likely setup in the that dir
  compile_rails_assets
  copy_project
  Dir.chdir(full(tmp_code)) do
    # These commands run from project root
    code_setup
    package_ruby
    code_finish
  end
end

#build_lambda_layer ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 111

def build_lambda_layer
  return if Jets.poly_only?
  lambda_layer = LambdaLayer.new
  lambda_layer.build
end

#cache_check_message ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 316

def cache_check_message
  if File.exist?("#{Jets.build_root}/cache")
    puts "The #{Jets.build_root}/cache folder exists. Incrementally re-building the jets using the cache.  To clear the cache: rm -rf #{Jets.build_root}/cache"
  end
end

#calculate_md5s ⇒ Object

Resolves the chicken-and-egg problem with md5 checksums. The handlers need to reference files with the md5 checksum. The files are the:

jets/code/rack-checksum.zip
jets/code/bundled-checksum.zip

We compute the checksums before we generate the node shim handlers.



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# File 'lib/jets/builders/code_builder.rb', line 53

def calculate_md5s
  Md5.compute! # populates Md5.checksums hash
end

#check_code_size! ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 117

def check_code_size!
  CodeSize.check!
end

#check_ruby_version ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 322

def check_ruby_version
  unless ruby_version_supported?
    puts "You are using ruby version #{RUBY_VERSION} which is not supported by Jets."
    ruby_variant = Jets::RUBY_VERSION.split('.')[0..1].join('.') + '.x'
    abort("Jets uses ruby #{Jets::RUBY_VERSION}.  You should use a variant of ruby #{ruby_variant}".colorize(:red))
  end
end

#clean_start ⇒ Object

Cleans out non-cached files like code-*.zip in Jets.build_root for a clean start. Also ensure that the /tmp/jets/project build root exists.

Most files are kept around after the build process for inspection and debugging. So we have to clean out the files. But we only want to clean out some of the files.



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# File 'lib/jets/builders/code_builder.rb', line 241

def clean_start
  Dir.glob("#{Jets.build_root}/code/code-*.zip").each { |f| FileUtils.rm_f(f) }
  FileUtils.mkdir_p(Jets.build_root) # /tmp/jets/demo
end

#code_finish ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 97

def code_finish
  # Reconfigure code
  store_s3_base_url
  disable_webpacker_middleware
  copy_internal_jets_code

  # Code prep and zipping
  build_lambda_layer
  check_code_size!
  calculate_md5s # must be called before generate_node_shims and create_zip_files
  generate_node_shims
  create_zip_files
end

#code_setup ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 93

def code_setup
  reconfigure_development_webpacker
end

#compile_assets ⇒ Object

This happens in the current app directory not the tmp code for simplicity. This is because the node and yarn has likely been set up correctly there.



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# File 'lib/jets/builders/code_builder.rb', line 185

def compile_assets
  if ENV['JETS_SKIP_ASSETS']
    puts "Skip compiling assets".colorize(:yellow) # useful for debugging
    return
  end

  headline "Compling assets in current project directory"
  # Thanks: https://stackoverflow.com/questions/4195735/get-list-of-gems-being-used-by-a-bundler-project
  webpacker_loaded = Gem.loaded_specs.keys.include?("webpacker")
  return unless webpacker_loaded

  sh("yarn install")
  webpack_command = File.exist?("#{Jets.root}bin/webpack") ?
      "bin/webpack" :
      `which webpack`.strip
  sh("JETS_ENV=#{Jets.env} #{webpack_command}")
end

#compile_rails_assets ⇒ Object

This happens in the current app directory not the tmp code for simplicity This is because the node likely been set up correctly there.



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# File 'lib/jets/builders/code_builder.rb', line 205

def compile_rails_assets
  return unless rails?

  if ENV['JETS_SKIP_ASSETS']
    puts "Skip compiling rack assets".colorize(:yellow) # useful for debugging
    return
  end

  return unless Jets.rack?

  Bundler.with_clean_env do
    rails_assets(:clobber)
    rails_assets(:precompile)
  end
end

#copy_internal_jets_code ⇒ Object

We copy the files into the project because we cannot require simple functions directly since they are wrapped by an anonymous class. TODO: Do this with the other files we required the same way.



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# File 'lib/jets/builders/code_builder.rb', line 124

def copy_internal_jets_code
  files = []
  files.each do |relative_path|
    src = File.expand_path("../internal/#{relative_path}", File.dirname(__FILE__))
    dest = "#{full(tmp_code)}/#{relative_path}"
    FileUtils.mkdir_p(File.dirname(dest))
    FileUtils.cp(src, dest)
  end
end

#copy_project ⇒ Object

Copy project into temporary directory. Do this so we can keep the project directory untouched and we can also remove a bunch of unnecessary files like logs before zipping it up.



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# File 'lib/jets/builders/code_builder.rb', line 249

def copy_project
  headline "Copying current project directory to temporary build area: #{full(tmp_code)}"
  FileUtils.rm_rf(stage_area) # clear out from previous build
  FileUtils.mkdir_p(stage_area)
  FileUtils.rm_rf(full(tmp_code)) # remove current code folder
  move_node_modules(Jets.root, Jets.build_root)
  begin
    # puts "cp -r #{@full_project_path} #{full(tmp_code)}".colorize(:yellow) # uncomment to debug
    FileUtils.cp_r(@full_project_path, full(tmp_code))
  ensure
    move_node_modules(Jets.build_root, Jets.root) # move node_modules directory back
  end
end

#create_zip_files ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 65

def create_zip_files
  folders = Md5.stage_folders
  # Md5.stage_folders ["stage/bundled", "stage/code"]
  folders.each do |folder|
    zip = Md5Zip.new(folder)
    if exist_on_s3?(zip.md5_name)
      puts "Already exists: s3://#{s3_bucket}/jets/code/#{zip.md5_name}"
    else
      zip = Md5Zip.new(folder)
      zip.create
    end
  end
end

#dir_size(folder) ⇒ Object

Thanks stackoverflow.com/questions/9354595/recursively-getting-the-size-of-a-directory Seems to overestimate a little bit but close enough.



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# File 'lib/jets/builders/code_builder.rb', line 136

def dir_size(folder)
  Dir.glob(File.join(folder, '**', '*'))
    .select { |f| File.file?(f) }
    .map{ |f| File.size(f) }
    .inject(:+)
end

#disable_webpacker_middleware ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 177

def disable_webpacker_middleware
  full_path = "#{full(tmp_code)}/config/disable-webpacker-middleware.txt"
  FileUtils.mkdir_p(File.dirname(full_path))
  FileUtils.touch(full_path)
end

#exist_on_s3?(filename) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jets/builders/code_builder.rb', line 79

def exist_on_s3?(filename)
  s3_key = "jets/code/#{filename}"
  begin
    s3.head_object(bucket: s3_bucket, key: s3_key)
    true
  rescue Aws::S3::Errors::NotFound
    false
  end
end

#generate_node_shims ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 57

def generate_node_shims
  headline "Generating shims in the handlers folder."
  # Crucial that the Dir.pwd is in the tmp_code because for
  # Jets::Builders::app_files because Jets.boot set ups
  # autoload_paths and this is how project classes are loaded.
  Jets::Builders::HandlerGenerator.build!
end

#move_node_modules(source_folder, dest_folder) ⇒ Object

Move the node modules to the tmp build folder to speed up project copying. A little bit risky because a ctrl-c in the middle of the project copying results in a missing node_modules but user can easily rebuild that.

Tesing shows 6.623413 vs 0.027754 speed improvement.



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# File 'lib/jets/builders/code_builder.rb', line 268

def move_node_modules(source_folder, dest_folder)
  source = "#{source_folder}/node_modules"
  dest = "#{dest_folder}/node_modules"
  if File.exist?(source)
    FileUtils.mv(source, dest)
  end
end

#package_ruby ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 301

def package_ruby
  return if Jets.poly_only?

  ruby_packager.install
  reconfigure_rails # call here after full(tmp_code) is available
  rack_packager.install
  ruby_packager.finish # by this time we have a /tmp/jets/demo/stage/code/bundled
  rack_packager.finish
end

#rack_packager ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 296

def rack_packager
  RackPackager.new("#{tmp_code}/rack")
end

#rails? ⇒ Boolean

Rudimentary rails detection

Returns:

  • (Boolean) 


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# File 'lib/jets/builders/code_builder.rb', line 229

def rails?
  config_ru = "#{Jets.root}rack/config.ru"
  return false unless File.exist?(config_ru)
  !IO.readlines(config_ru).grep(/Rails.application/).empty?
end

#rails_assets(cmd) ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 221

def rails_assets(cmd)
  # rake is available in both rails 4 and 5. rails command only in 5
  command = "rake assets:#{cmd} --trace"
  command = "RAILS_ENV=#{Jets.env} #{fulL_cmd}" unless Jets.env.development?
  sh("cd rack && #{command}")
end

#reconfigure_development_webpacker ⇒ Object

Bit hacky but this saves the user from accidentally forgetting to change this when they deploy a jets project in development mode



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# File 'lib/jets/builders/code_builder.rb', line 278

def reconfigure_development_webpacker
  return unless Jets.env.development?
  headline "Reconfiguring webpacker development settings for AWS Lambda."

  webpacker_yml = "#{full(tmp_code)}/config/webpacker.yml"
  return unless File.exist?(webpacker_yml)

  config = YAML.load_file(webpacker_yml)
  config["development"]["compile"] = false # force this to be false for deployment
  new_yaml = YAML.dump(config)
  IO.write(webpacker_yml, new_yaml)
end

#reconfigure_rails ⇒ Object

TODO: Move logic into plugin instead



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# File 'lib/jets/builders/code_builder.rb', line 312

def reconfigure_rails
  ReconfigureRails.new("#{full(tmp_code)}/rack").run
end

#ruby_packager ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 291

def ruby_packager
  RubyPackager.new(tmp_code)
end

#ruby_version_supported? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jets/builders/code_builder.rb', line 330

def ruby_version_supported?
  pattern = /(\d+)\.(\d+)\.(\d+)/
  md = RUBY_VERSION.match(pattern)
  ruby = {major: md[1], minor: md[2]}
  md = Jets::RUBY_VERSION.match(pattern)
  jets = {major: md[1], minor: md[2]}

  ruby[:major] == jets[:major] && ruby[:minor] == jets[:minor]
end

#s3_base_url ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 158

def s3_base_url
  # Allow user to set assets.base_url
  #
  #   Jets.application.configure do
  #     config.assets.base_url = "https://cloudfront.com/my/base/path"
  #   end
  #
  return Jets.config.assets.base_url if Jets.config.assets.base_url

  region = Jets.aws.region

  asset_base_url = "https://s3-#{region}.amazonaws.com"
  "#{asset_base_url}/#{s3_bucket}/jets" # s3_base_url
end

#s3_bucket ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 173

def s3_bucket
  Jets.aws.s3_bucket
end

#stage_area ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 89

def stage_area
  "#{Jets.build_root}/stage"
end

#store_s3_base_url ⇒ Object

Store s3 base url is needed for asset serving from s3 later. Need to package this as part of the code so we have a reference to it. At this point the minimal stack exists, so we can grab it with the AWS API. We do not want to grab this as part of the live request because it is slow.



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# File 'lib/jets/builders/code_builder.rb', line 147

def store_s3_base_url
  write_s3_base_url("config/s3_base_url.txt")
  write_s3_base_url("rack/config/s3_base_url.txt") if Jets.rack?
end

#tmp_code ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 345

def tmp_code
  self.class.tmp_code
end

#write_s3_base_url(relative_path) ⇒ Object 



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# File 'lib/jets/builders/code_builder.rb', line 152

def write_s3_base_url(relative_path)
  full_path = "#{full(tmp_code)}/#{relative_path}"
  FileUtils.mkdir_p(File.dirname(full_path))
  IO.write(full_path, s3_base_url)
end