cocoapods源码2 - cocoapods.rb

该rb文件主要完成：

• 1、require cocoapods依赖的rb文件
• 2、错误信息
• 3、autoload使用module关联后续被require的rb文件

require 'rubygems'
require 'xcodeproj'

# It is very likely that we'll need these and as some of those paths will atm
# result in a I18n deprecation warning, we load those here now so that we can
# get rid of that warning.
require 'active_support/core_ext/string/strip'
require 'active_support/core_ext/string/inflections'
require 'active_support/core_ext/array/conversions'
# TODO: check what this actually does by the time we're going to add support for
# other locales.
require 'i18n'
if I18n.respond_to?(:enforce_available_locales=)
  I18n.enforce_available_locales = false
end

module Pod
  # 1、
  require 'pathname'
  require 'tmpdir'

  # 2、导入依赖的cocoapods rb文件
  require 'cocoapods/gem_version'
  require 'cocoapods-core'
  require 'cocoapods/config'
  require 'cocoapods/downloader'
  # Loaded immediately after dependencies to ensure proper override of their
  # UI methods.
  require 'cocoapods/user_interface'

  # 2、Indicates an user error. This is defined in cocoapods-core.
  class Informative < PlainInformative
    def message
      "[!] #{super}".red
    end
  end

  # 3、Xcodeproj::PlainInformative.include(CLAide::InformativeError)
  Xcodeproj::PlainInformative.send(:include, CLAide::InformativeError)

  # 4、autoload(module, filename) 
  # - 1）将module与filename关联起来
  # - 2）当第一次使用module时，使用require加载对应的rb文件
  # - 3）执行过程与require一样
  # - 4）成功返回nil，找不到文件会抛出LoadError
  # - 5）通过 Pod::module => 访问被关联的 filename rb文件
  #   => Pod::Command => require('cocoapods/command') => cocoapods/command.rb
  autoload :AggregateTarget,           'cocoapods/target/aggregate_target'
  autoload :Command,                   'cocoapods/command'
  autoload :Deintegrator,              'cocoapods_deintegrate'
  autoload :Executable,                'cocoapods/executable'
  autoload :ExternalSources,           'cocoapods/external_sources'
  autoload :Installer,                 'cocoapods/installer'
  autoload :HooksManager,              'cocoapods/hooks_manager'
  autoload :PodTarget,                 'cocoapods/target/pod_target'
  autoload :Project,                   'cocoapods/project'
  autoload :Resolver,                  'cocoapods/resolver'
  autoload :Sandbox,                   'cocoapods/sandbox'
  autoload :Target,                    'cocoapods/target'
  autoload :Validator,                 'cocoapods/validator'

  # 5、继续定义module，专门关联右侧rb文件
  module Generator
    autoload :Acknowledgements,        'cocoapods/generator/acknowledgements'
    autoload :Markdown,                'cocoapods/generator/acknowledgements/markdown'
    autoload :Plist,                   'cocoapods/generator/acknowledgements/plist'
    autoload :BridgeSupport,           'cocoapods/generator/bridge_support'
    autoload :Constant,                'cocoapods/generator/constant'
    autoload :CopyResourcesScript,     'cocoapods/generator/copy_resources_script'
    autoload :DummySource,             'cocoapods/generator/dummy_source'
    autoload :EmbedFrameworksScript,   'cocoapods/generator/embed_frameworks_script'
    autoload :Header,                  'cocoapods/generator/header'
    autoload :InfoPlistFile,           'cocoapods/generator/info_plist_file'
    autoload :ModuleMap,               'cocoapods/generator/module_map'
    autoload :PrefixHeader,            'cocoapods/generator/prefix_header'
    autoload :UmbrellaHeader,          'cocoapods/generator/umbrella_header'
    autoload :AppTargetHelper,         'cocoapods/generator/app_target_helper'
  end

  # 6、
  require 'cocoapods/core_overrides'
end