vendor/rails/railties/builtin/rails_info/rails/info.rb

   1 module Rails
   2   module Info
   3     mattr_accessor :properties
   4     class << (@@properties = [])
   5       def names
   6         map &:first
   7       end
   8
   9       def value_for(property_name)
  10         if property = assoc(property_name)
  11           property.last
  12         end
  13       end
  14     end
  15
  16     class << self #:nodoc:
  17       def property(name, value = nil)
  18         value ||= yield
  19         properties << [name, value] if value
  20       rescue Exception
  21       end
  22
  23       def components
  24         %w( active_record action_pack active_resource action_mailer active_support )
  25       end
  26
  27       def component_version(component)
  28         require "#{component}/version"
  29         "#{component.classify}::VERSION::STRING".constantize
  30       end
  31
  32       def edge_rails_revision(info = git_info)
  33         info[/commit ([a-z0-9-]+)/, 1] || freeze_edge_version
  34       end
  35
  36       def freeze_edge_version
  37         if File.exist?(rails_vendor_root)
  38           begin
  39             Dir[File.join(rails_vendor_root, 'REVISION_*')].first.scan(/_(\d+)$/).first.first
  40           rescue
  41             Dir[File.join(rails_vendor_root, 'TAG_*')].first.scan(/_(.+)$/).first.first rescue 'unknown'
  42           end
  43         end
  44       end
  45
  46       def to_s
  47         column_width = properties.names.map {|name| name.length}.max
  48         ["About your application's environment", *properties.map do |property|
  49           "%-#{column_width}s   %s" % property
  50         end] * "\n"
  51       end
  52
  53       alias inspect to_s
  54
  55       def to_html
  56         returning table = '<table>' do
  57           properties.each do |(name, value)|
  58             table << %(<tr><td class="name">#{CGI.escapeHTML(name.to_s)}</td>)
  59             table << %(<td class="value">#{CGI.escapeHTML(value.to_s)}</td></tr>)
  60           end
  61           table << '</table>'
  62         end
  63       end
  64
  65       protected
  66         def rails_vendor_root
  67           @rails_vendor_root ||= "#{RAILS_ROOT}/vendor/rails"
  68         end
  69
  70         def git_info
  71           env_lang, ENV['LC_ALL'] = ENV['LC_ALL'], 'C'
  72           Dir.chdir(rails_vendor_root) do
  73             silence_stderr { `git log -n 1` }
  74           end
  75         ensure
  76           ENV['LC_ALL'] = env_lang
  77         end
  78     end
  79
  80     # The Ruby version and platform, e.g. "1.8.2 (powerpc-darwin8.2.0)".
  81     property 'Ruby version', "#{RUBY_VERSION} (#{RUBY_PLATFORM})"
  82
  83     # The RubyGems version, if it's installed.
  84     property 'RubyGems version' do
  85       Gem::RubyGemsVersion
  86     end
  87
  88     # The Rails version.
  89     property 'Rails version' do
  90       Rails::VERSION::STRING
  91     end
  92
  93     # Versions of each Rails component (Active Record, Action Pack,
  94     # Active Resource, Action Mailer, and Active Support).
  95     components.each do |component|
  96       property "#{component.titlecase} version" do
  97         component_version(component)
  98       end
  99     end
 100
 101     # The Rails Git revision, if it's checked out into vendor/rails.
 102     property 'Edge Rails revision' do
 103       edge_rails_revision
 104     end
 105
 106     # The application's location on the filesystem.
 107     property 'Application root' do
 108       File.expand_path(RAILS_ROOT)
 109     end
 110
 111     # The current Rails environment (development, test, or production).
 112     property 'Environment' do
 113       RAILS_ENV
 114     end
 115
 116     # The name of the database adapter for the current environment.
 117     property 'Database adapter' do
 118       ActiveRecord::Base.configurations[RAILS_ENV]['adapter']
 119     end
 120
 121     property 'Database schema version' do
 122       ActiveRecord::Migrator.current_version rescue nil
 123     end
 124   end
 125 end