Class: Gem::Validator

Inherits:
Object
  • Object
show all
Includes:
UserInteraction
Defined in:
lib/rubygems/validator.rb

Overview

Validator performs various gem file and gem database validation

Defined Under Namespace

Classes: ErrorData

Instance Method Summary collapse

Methods included from UserInteraction

#alert, #alert_error, #alert_warning, #ask, #ask_for_password, #ask_yes_no, #choose_from_list, #say, #terminate_interaction, #verbose

Methods included from DefaultUserInteraction

ui, #ui, #ui=, ui=, use_ui, #use_ui

Methods included from Text

#clean_text, #format_text, #levenshtein_distance, #min3, #truncate_text

Constructor Details

#initializeValidator

:nodoc:


17
18
19
# File 'lib/rubygems/validator.rb', line 17

def initialize # :nodoc:
  require 'find'
end

Instance Method Details

#alien(gems = []) ⇒ Object

Checks the gem directory for the following potential inconsistencies/problems:

  • Checksum gem itself

  • For each file in each gem, check consistency of installed versions

  • Check for files that aren't part of the gem but are in the gems directory

  • 1 cache - 1 spec - 1 directory.

returns a hash of ErrorData objects, keyed on the problem gem's name. – TODO needs further cleanup


61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
# File 'lib/rubygems/validator.rb', line 61

def alien(gems=[])
  errors = Hash.new {|h,k| h[k] = {} }

  Gem::Specification.each do |spec|
    next unless gems.include? spec.name unless gems.empty?
    next if spec.default_gem?

    gem_name      = spec.file_name
    gem_path      = spec.cache_file
    spec_path     = spec.spec_file
    gem_directory = spec.full_gem_path

    unless File.directory? gem_directory
      errors[gem_name][spec.full_name] =
        "Gem registered but doesn't exist at #{gem_directory}"
      next
    end

    unless File.exist? spec_path
      errors[gem_name][spec_path] = "Spec file missing for installed gem"
    end

    begin
      unless File.readable?(gem_path)
        raise Gem::VerificationError, "missing gem file #{gem_path}"
      end

      good, gone, unreadable = nil, nil, nil, nil

      File.open gem_path, Gem.binary_mode do |file|
        package = Gem::Package.new gem_path

        good, gone = package.contents.partition do |file_name|
          File.exist? File.join(gem_directory, file_name)
        end

        gone.sort.each do |path|
          errors[gem_name][path] = "Missing file"
        end

        good, unreadable = good.partition do |file_name|
          File.readable? File.join(gem_directory, file_name)
        end

        unreadable.sort.each do |path|
          errors[gem_name][path] = "Unreadable file"
        end

        good.each do |entry, data|
          begin
            next unless data # HACK `gem check -a mkrf`

            source = File.join gem_directory, entry['path']

            File.open source, Gem.binary_mode do |f|
              unless f.read == data
                errors[gem_name][entry['path']] = "Modified from original"
              end
            end
          end
        end
      end

      installed_files = find_files_for_gem(gem_directory)
      extras = installed_files - good - unreadable

      extras.each do |extra|
        errors[gem_name][extra] = "Extra file"
      end
    rescue Gem::VerificationError => e
      errors[gem_name][gem_path] = e.message
    end
  end

  errors.each do |name, subhash|
    errors[name] = subhash.map do |path, msg|
      ErrorData.new path, msg
    end.sort
  end

  errors
end