install.rb in xcode-install-0.2.0

- old
+ new

@@ -162,11 +162,13 @@
 			`sudo /usr/sbin/dseditgroup -o edit -t group -a staff _developer`
 		end
 
 		def get_seedlist
 			@xcodes = parse_seedlist(devcenter.download_seedlist)
-			@xcodes += prereleases
+			
+			names = @xcodes.map(&:name)
+			@xcodes += prereleases.reject { |pre| names.include?(pre.name) }
 
 			File.open(LIST_FILE,'w') do |f|
 				f << Marshal.dump(xcodes)
 			end
 
@@ -180,11 +182,11 @@
 		def parse_seedlist(seedlist)
 			seedlist['data'].select { 
 				|t| /^Xcode [0-9]/.match(t['name'])
 			}.map { |x| Xcode.new(x) }.reject { |x| x.version < MINIMUM_VERSION }.sort { 
 				|a,b| a.dateModified <=> b.dateModified
-			}
+			}.select { |x| x.url.end_with?('.dmg') }
 		end
 
 		def list_versions
 			installed = installed_versions.map { |x| x.version }
 			seedlist.map { |x| x.name }.reject { |x| installed.include?(x) }
@@ -240,9 +242,18 @@
 			begin
 				@version = Gem::Version.new(@name.split(' ')[0])
 			rescue
 				@version = Installer::MINIMUM_VERSION
 			end
+		end
+
+		def to_s
+			"Xcode #{version} -- #{url}"
+		end
+
+		def ==(o)
+			dateModified == o.dateModified && name == o.name && path == o.path && \
+				url == o.url && version == o.version
 		end
 
 		def self.new_prelease(version, url)
 			self.new({'name' => version,
 				'dateModified' => Time.now.to_i,