| 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