lib/java/artifact.rb in buildr-1.2.5 vs lib/java/artifact.rb in buildr-1.2.6

@@ -544,9 +544,32 @@
         fail "Invalid artifact specification in: #{specs.to_s}"
       end
     end
   end
 
+  def transitive(*specs)
+    specs.flatten.inject([]) do |set, spec|
+      case spec
+      when /([^:]+:){2,4}/ # A spec as opposed to a file name.
+        artifact = artifact(spec)
+        set |= [artifact] unless artifact.type == :pom
+        set |= POM.load(artifact.pom).dependencies.map { |spec| artifact(spec) }
+      when Hash
+        set |= [transitive(spec)]
+      when String # Must always expand path.
+        set |= transitive(file(File.expand_path(spec)))
+      when Project
+        set |= transitive(spec.packages)
+      when Rake::Task
+        set |= spec.respond_to?(:to_spec) ? transitive(spec.to_spec) : [spec]
+      when Struct
+        set |= transitive(spec.values)
+      else
+        fail "Invalid artifact specification in: #{specs.to_s}"
+      end
+    end
+  end
+
   # :call-seq:
   #   groups(ids, :under=>group_name, :version=>number) => artifacts
   #
   # Convenience method for defining multiple artifacts that belong to the same group and version.
   # Accepts multiple artifact identifiers follows by two hash values: