Parse the manifest file and expose it as a Hash.

Parsed as plain json rather than json-ld as the json-ld parser has a bug that
stops us from using it at present:

ruby-rdf/json-ld#11

Author: hainesr

lib/ro-bundle.rb

@@ -7,6 +7,7 @@
 #------------------------------------------------------------------------------
 
 require "bundler/setup"
+require "json"
 require "ucf"
 
 require "ro-bundle/version"

lib/ro-bundle/file.rb

@@ -23,7 +23,8 @@ def initialize(filename)
       super(filename)
 
       # Initialize the managed entries and register the .ro directory.
-      initialize_managed_entries(RODir.new)
+      @manifest = Manifest.new
+      initialize_managed_entries(RODir.new(@manifest))
     end
     # :startdoc:
 
@@ -44,5 +45,11 @@ def initialize(filename)
     def File.create(filename, mimetype = MIMETYPE, &block)
       super(filename, mimetype, &block)
     end
+
+    protected
+
+    def manifest
+      @manifest.structure
+    end
   end
 end

lib/ro-bundle/ro-dir.rb

@@ -8,14 +8,30 @@
 
 module ROBundle
   class RODir < ZipContainer::ManagedDirectory
-    def initialize
-      super(".ro", false, [Manifest.new])
+
+    DIR_NAME = ".ro"
+
+    def initialize(manifest)
+      super(DIR_NAME, false, [manifest])
     end
   end
 
   class Manifest < ZipContainer::ManagedFile
+
+    FILE_NAME = "manifest.json"
+
     def initialize
-      super("manifest.json", false)
+      super(FILE_NAME, false)
+    end
+
+    # Need this because we can't access file contents in the constructor.
+    def structure
+      begin
+        @structure ||= JSON.parse(contents)
+      rescue
+        @structure = {}
+      end
     end
+
   end
 end

ro-bundle.gemspec

@@ -37,4 +37,5 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency("rdoc", "~> 4.1")
   spec.add_development_dependency "coveralls"
   spec.add_runtime_dependency "ucf", "~> 0.7"
+  spec.add_runtime_dependency "json", "~> 1.8"
 end