Adds support for file viewing with Darcs 2.0+ (patch #1799 by Ralph Lange slightly edited).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1759 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/repository/darcs.rb

@@ -28,6 +28,11 @@ class Repository::Darcs < Repository
     'Darcs'
   end
   
+  def entry(path=nil, identifier=nil)
+    patch = identifier.nil? ? nil : changesets.find_by_revision(identifier)
+    scm.entry(path, patch.nil? ? nil : patch.scmid)
+  end
+  
   def entries(path=nil, identifier=nil)
     patch = identifier.nil? ? nil : changesets.find_by_revision(identifier)
     entries = scm.entries(path, patch.nil? ? nil : patch.scmid)
@@ -46,6 +51,11 @@ class Repository::Darcs < Repository
     entries
   end
   
+  def cat(path, identifier=nil)
+    patch = identifier.nil? ? nil : changesets.find_by_revision(identifier)
+    scm.cat(path, patch.nil? ? nil : patch.scmid)
+  end
+  
   def diff(path, rev, rev_to)
     patch_from = changesets.find_by_revision(rev)
     return nil if patch_from.nil?