Index: lib/redmine/scm/adapters/mercurial_adapter.rb
===================================================================
--- lib/redmine/scm/adapters/mercurial_adapter.rb	(revision 4786)
+++ lib/redmine/scm/adapters/mercurial_adapter.rb	(working copy)
@@ -28,7 +28,8 @@
         TEMPLATES_DIR = File.dirname(__FILE__) + "/mercurial"
         TEMPLATE_NAME = "hg-template"
         TEMPLATE_EXTENSION = "tmpl"
-        
+        TEMP_DIR = File.dirname(__FILE__) + "/../../../../tmp/hgrepository"
+          
         class << self
           def client_version
             @@client_version ||= (hgversion || [])
@@ -203,6 +204,40 @@
           return nil if $? && $?.exitstatus != 0
           blame
         end
+        
+        def target(path)		  
+          path||=''
+          base = path.match(/^\//) ? root_url : url
+		  path="#{base}/#{path}".gsub(/[?<>\*]/, '')          
+		  path = clone(path) if is_remote(path)		  
+		  shell_quote(path)
+        end
+        
+        #determinate is remote repository
+        def is_remote(path)		  
+          path =~ /http|https/		
+        end
+        
+        #retrive local repository path
+        def get_local_path(url)
+          Dir.mkdir(TEMP_DIR) if !File.directory?(TEMP_DIR)		 		 
+          repo=url.split('/')[-1]		  
+          "#{TEMP_DIR}/#{repo}"
+        end
+        
+        #clone/update remote repository
+        def clone(url)
+          local=get_local_path(url)
+          cmd=""
+          if File.directory?(local)
+            cmd << "#{HG_BIN} pull -u -R #{local}"
+          else
+            Dir.mkdir(local)
+            cmd << "#{HG_BIN} clone #{url} #{local}"
+          end
+		  shellout(cmd)
+          local
+        end
       end
     end
   end