Class: ChefApply::Startup

Inherits:
Object
  • Object
show all
Defined in:
lib/chef_apply/startup.rb

Defined Under Namespace

Classes: ConfigPathInvalid, ConfigPathNotProvided, UnsupportedInstallation

Constant Summary collapse

T = 
ChefApply::Text.cli

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(argv) ⇒ Startup 



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# File 'lib/chef_apply/startup.rb', line 28

def initialize(argv)
  @term_init = false
  @argv = argv.clone
  # Enable CLI output via Terminal. This comes first because other startup steps may
  # need to output to the terminal.
  init_terminal
end

Instance Attribute Details

#argv ⇒ Object (readonly)

Returns the value of attribute argv.



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# File 'lib/chef_apply/startup.rb', line 25

def argv
  @argv
end

Instance Method Details

#create_default_config ⇒ Object 



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# File 'lib/chef_apply/startup.rb', line 113

def create_default_config
  UI::Terminal.output T.creating_config(Config.default_location)
  UI::Terminal.output ""
  FileUtils.mkdir_p(Config::WS_BASE_PATH)
  FileUtils.touch(Config.default_location)
end

#custom_config_path ⇒ Object

Look for a user-supplied config path by manually parsing the option. Note that we can’t use Mixlib::CLI for this. To ensure that ChefApply::CLI initializes with correct option defaults, we need to have configuraton loaded before initializing it.



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# File 'lib/chef_apply/startup.rb', line 164

def custom_config_path
  argv.each_with_index do |arg, index|
    if arg == "--config-path" || arg == "-c"
      next_arg = argv[index + 1]
      raise ConfigPathNotProvided.new if next_arg.nil?
      raise ConfigPathInvalid.new(next_arg) unless File.file?(next_arg) && File.readable?(next_arg)
      return next_arg
    end
  end
  nil
end

#first_run_tasks ⇒ Object 



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# File 'lib/chef_apply/startup.rb', line 107

def first_run_tasks
  return if Dir.exist?(Config::WS_BASE_PATH)
  create_default_config
  setup_telemetry
end

#init_terminal ⇒ Object 



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# File 'lib/chef_apply/startup.rb', line 94

def init_terminal
  UI::Terminal.init($stdout)
end

#load_config ⇒ Object 



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# File 'lib/chef_apply/startup.rb', line 154

def load_config
  path = custom_config_path
  Config.custom_location(path) unless path.nil?
  Config.load
end

#run ⇒ Object 



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# File 'lib/chef_apply/startup.rb', line 36

def run
  # This component is not supported in ChefDK; an exception will be raised
  # if running in that context.
  verify_not_in_chefdk

  # Some tasks we do only once in an installation:
  first_run_tasks

  # Call this every time, so that if we add or change ~/.chef-workstation
  # directory structure, we can be sure that it exists. Even with a
  # custom configuration, the .chef-workstation directory and subdirs
  # are required.
  setup_workstation_user_directories

  # Customize behavior of Ruby and any gems around error handling
  setup_error_handling

  # Startup tasks that may change behavior based on configuration value
  # must be run after load_config
  load_config

  # Init logging using log level out of config
  setup_logging

  # Begin upload of previous session telemetry. (If telemetry is not enabled,
  # in config the uploader will clean up previous session(s) without sending)
  start_telemeter_upload

  # Launch the actual Chef Apply behavior
  start_chef_apply

# NOTE: Because these exceptions occur outside of the
#       CLI handling, they won't be tracked in telemtry.
#       We can revisit this once the pending error handling rework
#       is underway.
rescue ConfigPathInvalid => e
  UI::Terminal.output(T.error.bad_config_file(e.path))
rescue ConfigPathNotProvided
  UI::Terminal.output(T.error.missing_config_path)
rescue UnsupportedInstallation
  UI::Terminal.output(T.error.unsupported_installation)
rescue Mixlib::Config::UnknownConfigOptionError => e
  # Ideally we'd update the exception in mixlib to include
  # a field with the faulty value, line number, and nested context -
  # it's less fragile than depending on text parsing, which
  # is what we'll do for now.
  if e.message =~ /.*unsupported config value (.*)[.]+$/
    # TODO - levenshteinian distance to figure out
    # what they may have meant instead.
    UI::Terminal.output(T.error.invalid_config_key($1, Config.location))
  else
    # Safety net in case the error text changes from under us.
    UI::Terminal.output(T.error.unknown_config_error(e.message, Config.location))
  end
rescue Tomlrb::ParseError => e
  UI::Terminal.output(T.error.unknown_config_error(e.message, Config.location))
end

#setup_error_handling ⇒ Object 



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# File 'lib/chef_apply/startup.rb', line 143

def setup_error_handling
  # In Ruby 2.5+ threads print out to stdout when they raise an exception. This is an agressive
  # attempt to ensure debugging information is not lost, but in our case it is not necessary
  # because we handle all the errors ourself. So we disable this to keep output clean.
  # See https://ruby-doc.org/core-2.5.0/Thread.html#method-c-report_on_exception
  #
  # We set this globally so that it applies to all threads we create - we never want any non-UI thread
  # to render error output to the terminal.
  Thread.report_on_exception = false
end

#setup_logging ⇒ Object 



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# File 'lib/chef_apply/startup.rb', line 176

def setup_logging
  ChefApply::Log.setup(Config.log.location, Config.log.level.to_sym)
  ChefApply::Log.info("Initialized logger")

  ChefConfig.logger = ChefApply::Log
  # Setting the config isn't enough, we need to ensure the logger is initialized
  # or automatic initialization will still go to stdout
  Chef::Log.init(ChefApply::Log.location)
  Chef::Log.level = ChefApply::Log.level
end

#setup_telemetry ⇒ Object 



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# File 'lib/chef_apply/startup.rb', line 120

def setup_telemetry
  require "securerandom"
  installation_id = SecureRandom.uuid
  File.write(Config.telemetry_installation_identifier_file, installation_id)

  # Tell the user we're anonymously tracking, give brief opt-out
  # and a link to detailed information.
  UI::Terminal.output T.telemetry_enabled(Config.location)
  UI::Terminal.output ""
end

#setup_workstation_user_directories ⇒ Object 



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# File 'lib/chef_apply/startup.rb', line 135

def setup_workstation_user_directories
  # Note that none of  these paths are customizable in config, so
  # it's safe to do before we load config.
  FileUtils.mkdir_p(Config::WS_BASE_PATH)
  FileUtils.mkdir_p(Config.base_log_directory)
  FileUtils.mkdir_p(Config.telemetry_path)
end

#start_chef_apply ⇒ Object 



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# File 'lib/chef_apply/startup.rb', line 187

def start_chef_apply
  require "chef_apply/cli"
  ChefApply::CLI.new(@argv).run
end

#start_telemeter_upload ⇒ Object 



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# File 'lib/chef_apply/startup.rb', line 131

def start_telemeter_upload
  ChefApply::Telemeter::Sender.start_upload_thread()
end

#verify_not_in_chefdk ⇒ Object

Verify that chef-run gem is not executing out of ChefDK by checking the runtime path of this file.

NOTE: This is imperfect - someone could theoretically install chefdk to a path other than the default.

Raises:



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# File 'lib/chef_apply/startup.rb', line 103

def verify_not_in_chefdk
  raise UnsupportedInstallation.new if script_path =~ /chefdk/
end