Class | Gem::Validator |
In: |
lib/rubygems/validator.rb
|
Parent: | Object |
Validator performs various gem file and gem database validation
ErrorData | = | Struct.new :path, :problem |
# File lib/rubygems/validator.rb, line 17 17: def initialize 18: require 'find' 19: require 'digest' 20: end
Checks the gem directory for the following potential inconsistencies/problems:
returns a hash of ErrorData objects, keyed on the problem gem‘s name.
# File lib/rubygems/validator.rb, line 84 84: def alien(gems=[]) 85: errors = Hash.new { |h,k| h[k] = {} } 86: 87: Gem::SourceIndex.from_installed_gems.each do |gem_name, gem_spec| 88: next unless gems.include? gem_spec.name unless gems.empty? 89: 90: install_dir = gem_spec.installation_path 91: gem_path = Gem.cache_gem(gem_spec.file_name, install_dir) 92: spec_path = File.join install_dir, "specifications", gem_spec.spec_name 93: gem_directory = gem_spec.full_gem_path 94: 95: unless File.directory? gem_directory then 96: errors[gem_name][gem_spec.full_name] = 97: "Gem registered but doesn't exist at #{gem_directory}" 98: next 99: end 100: 101: unless File.exist? spec_path then 102: errors[gem_name][spec_path] = "Spec file missing for installed gem" 103: end 104: 105: begin 106: verify_gem_file(gem_path) 107: 108: good, gone, unreadable = nil, nil, nil, nil 109: 110: open gem_path, Gem.binary_mode do |file| 111: format = Gem::Format.from_file_by_path(gem_path) 112: 113: good, gone = format.file_entries.partition { |entry, _| 114: File.exist? File.join(gem_directory, entry['path']) 115: } 116: 117: gone.map! { |entry, _| entry['path'] } 118: gone.sort.each do |path| 119: errors[gem_name][path] = "Missing file" 120: end 121: 122: good, unreadable = good.partition { |entry, _| 123: File.readable? File.join(gem_directory, entry['path']) 124: } 125: 126: unreadable.map! { |entry, _| entry['path'] } 127: unreadable.sort.each do |path| 128: errors[gem_name][path] = "Unreadable file" 129: end 130: 131: good.each do |entry, data| 132: begin 133: next unless data # HACK `gem check -a mkrf` 134: 135: open File.join(gem_directory, entry['path']), Gem.binary_mode do |f| 136: unless Digest::MD5.hexdigest(f.read).to_s == 137: Digest::MD5.hexdigest(data).to_s then 138: errors[gem_name][entry['path']] = "Modified from original" 139: end 140: end 141: end 142: end 143: end 144: 145: installed_files = find_files_for_gem(gem_directory) 146: good.map! { |entry, _| entry['path'] } 147: extras = installed_files - good - unreadable 148: 149: extras.each do |extra| 150: errors[gem_name][extra] = "Extra file" 151: end 152: rescue Gem::VerificationError => e 153: errors[gem_name][gem_path] = e.message 154: end 155: end 156: 157: errors.each do |name, subhash| 158: errors[name] = subhash.map { |path, msg| ErrorData.new(path, msg) } 159: end 160: 161: errors 162: end
# File lib/rubygems/validator.rb, line 164 164: def remove_leading_dot_dir(path) 165: path.sub(/^\.\//, "") 166: end
Given a gem file‘s contents, validates against its own MD5 checksum
gem_data: | [String] Contents of the gem file |
# File lib/rubygems/validator.rb, line 26 26: def verify_gem(gem_data) 27: raise Gem::VerificationError, 'empty gem file' if gem_data.size == 0 28: 29: unless gem_data =~ /MD5SUM/ then 30: return # Don't worry about it...this sucks. Need to fix MD5 stuff for 31: # new format 32: # FIXME 33: end 34: 35: sum_data = gem_data.gsub(/MD5SUM = "([a-z0-9]+)"/, 36: "MD5SUM = \"#{"F" * 32}\"") 37: 38: unless Digest::MD5.hexdigest(sum_data) == $1.to_s then 39: raise Gem::VerificationError, 'invalid checksum for gem file' 40: end 41: end
Given the path to a gem file, validates against its own MD5 checksum
gem_path: | [String] Path to gem file |
# File lib/rubygems/validator.rb, line 48 48: def verify_gem_file(gem_path) 49: open gem_path, Gem.binary_mode do |file| 50: gem_data = file.read 51: verify_gem gem_data 52: end 53: rescue Errno::ENOENT, Errno::EINVAL 54: raise Gem::VerificationError, "missing gem file #{gem_path}" 55: end