# File lib/rubygems/dependency.rb, line 34
34:   def initialize name, *requirements
35:     if Regexp === name then
36:       msg = ["NOTE: Dependency.new w/ a regexp is deprecated.",
37:              "Dependency.new called from #{Gem.location_of_caller.join(":")}"]
38:       warn msg.join("\n") unless Gem::Deprecate.skip
39:     end
40: 
41:     type         = Symbol === requirements.last ? requirements.pop : :runtime
42:     requirements = requirements.first if 1 == requirements.length # unpack
43: 
44:     unless TYPES.include? type
45:       raise ArgumentError, "Valid types are #{TYPES.inspect}, "
46:         + "not #{type.inspect}"
47:     end
48: 
49:     @name        = name
50:     @requirement = Gem::Requirement.create requirements
51:     @type        = type
52:     @prerelease  = false
53: 
54:     # This is for Marshal backwards compatibility. See the comments in
55:     # +requirement+ for the dirty details.
56: 
57:     @version_requirements = @requirement
58:   end

     # File lib/rubygems/dependency.rb, line 154
154:   def <=> other
155:     self.name <=> other.name
156:   end

     # File lib/rubygems/dependency.rb, line 164
164:   def =~ other
165:     unless Gem::Dependency === other
166:       return unless other.respond_to?(:name) && other.respond_to?(:version)
167:       other = Gem::Dependency.new other.name, other.version
168:     end
169: 
170:     return false unless name === other.name
171: 
172:     reqs = other.requirement.requirements
173: 
174:     return false unless reqs.length == 1
175:     return false unless reqs.first.first == '='
176: 
177:     version = reqs.first.last
178: 
179:     requirement.satisfied_by? version
180:   end

     # File lib/rubygems/dependency.rb, line 182
182:   def match? name, version
183:     return false unless self.name === name
184:     return true if requirement.none?
185: 
186:     requirement.satisfied_by? Gem::Version.new(version)
187:   end

     # File lib/rubygems/dependency.rb, line 189
189:   def matches_spec? spec
190:     return false unless name === spec.name
191:     return true  if requirement.none?
192: 
193:     requirement.satisfied_by?(spec.version)
194:   end

     # File lib/rubygems/dependency.rb, line 215
215:   def matching_specs platform_only = false
216:     matches = Gem::Specification.find_all { |spec|
217:       self.name === spec.name and # TODO: == instead of ===
218:         requirement.satisfied_by? spec.version
219:     }
220: 
221:     if platform_only
222:       matches.reject! { |spec|
223:         not Gem::Platform.match spec.platform
224:       }
225:     end
226: 
227:     matches = matches.sort_by { |s| s.sort_obj } # HACK: shouldn't be needed
228:   end

     # File lib/rubygems/dependency.rb, line 199
199:   def merge other
200:     unless name == other.name then
201:       raise ArgumentError,
202:             "#{self} and #{other} have different names"
203:     end
204: 
205:     default = Gem::Requirement.default
206:     self_req  = self.requirement
207:     other_req = other.requirement
208: 
209:     return self.class.new name, self_req  if other_req == default
210:     return self.class.new name, other_req if self_req  == default
211: 
212:     self.class.new name, self_req.as_list.concat(other_req.as_list)
213:   end

    # File lib/rubygems/dependency.rb, line 76
76:   def prerelease?
77:     @prerelease || requirement.prerelease?
78:   end

     # File lib/rubygems/dependency.rb, line 98
 98:   def requirement
 99:     return @requirement if defined?(@requirement) and @requirement
100: 
101:     # @version_requirements and @version_requirement are legacy ivar
102:     # names, and supported here because older gems need to keep
103:     # working and Dependency doesn't implement marshal_dump and
104:     # marshal_load. In a happier world, this would be an
105:     # attr_accessor. The horrifying instance_variable_get you see
106:     # below is also the legacy of some old restructurings.
107:     #
108:     # Note also that because of backwards compatibility (loading new
109:     # gems in an old RubyGems installation), we can't add explicit
110:     # marshaling to this class until we want to make a big
111:     # break. Maybe 2.0.
112:     #
113:     # Children, define explicit marshal and unmarshal behavior for
114:     # public classes. Marshal formats are part of your public API.
115: 
116:     if defined?(@version_requirement) && @version_requirement
117:       version = @version_requirement.instance_variable_get :@version
118:       @version_requirement  = nil
119:       @version_requirements = Gem::Requirement.new version
120:     end
121: 
122:     @requirement = @version_requirements if defined?(@version_requirements)
123:   end

     # File lib/rubygems/dependency.rb, line 125
125:   def requirements_list
126:     requirement.as_list
127:   end

     # File lib/rubygems/dependency.rb, line 233
233:   def specific?
234:     @requirement.specific?
235:   end

     # File lib/rubygems/dependency.rb, line 255
255:   def to_spec
256:     matches = self.to_specs
257: 
258:     matches.find { |spec| spec.activated? } or matches.last
259:   end

     # File lib/rubygems/dependency.rb, line 237
237:   def to_specs
238:     matches = matching_specs true
239: 
240:     # TODO: check Gem.activated_spec[self.name] in case matches falls outside
241: 
242:     if matches.empty? then
243:       specs = Gem::Specification.all_names.join ", "
244:       error = Gem::LoadError.new "Could not find #{name} (#{requirement}) amongst [#{specs}]"
245:       error.name        = self.name
246:       error.requirement = self.requirement
247:       raise error
248:     end
249: 
250:     # TODO: any other resolver validations should go here
251: 
252:     matches
253:   end

     # File lib/rubygems/dependency.rb, line 140
140:   def type
141:     @type ||= :runtime
142:   end