--- a/commitwatcher/agent.py	Fri Sep 27 14:23:53 2013 -0700
+++ b/commitwatcher/agent.py	Sat Sep 28 05:10:14 2013 -0700
@@ -3,6 +3,7 @@
 """
 
 import feedparser
+from abc import abstractmethod
 from .commit import Commit
 from .store import MemoryStore
 
@@ -38,10 +39,30 @@
         feed = feedparser.parse(self.feed())
         for entry in feed['entries']:
 
-            # get paths from diff
             link = entry['link']
-            print link
             files = self.files(link)
             # TODO
 
             # TODO            commit = Commit()
+
+class FeedAgentDiff(FeedAgent):
+    """read files from diff"""
+
+    def diff_url(self, link):
+        """
+        returns diff_url from revision link:
+
+        >>> diff_url('http://hg.mozilla.org/mozilla-central/rev/4e1a3919e741')
+        'http://hg.mozilla.org/mozilla-central/raw-rev/4e1a3919e741'
+        """
+        return '/raw-rev/'.join(link.rsplit('/rev/', 1))
+
+    def files(self, revision):
+        """
+        revision -- revision link
+        """
+
+        raw_rev = self.diff_url(revision)
+        print raw_rev
+
+        # get paths from diff

--- a/mozbasewatcher.py	Fri Sep 27 14:23:53 2013 -0700
+++ b/mozbasewatcher.py	Sat Sep 28 05:10:14 2013 -0700
@@ -9,7 +9,7 @@
 import optparse
 import os
 import sys
-from commitwatcher import FeedAgent
+from commitwatcher import FeedAgentDiff
 
 def main(args=sys.argv[1:]):
 
@@ -20,7 +20,7 @@
 
     # watch mozilla-central
     repo = 'http://hg.mozilla.org/mozilla-central'
-    watcher = FeedAgent(repository=repo)
+    watcher = FeedAgentDiff(repository=repo)
     watcher.update()
 
 if __name__ == '__main__':

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/41701d2c0341.diff	Sat Sep 28 05:10:14 2013 -0700
@@ -0,0 +1,68 @@
+
+# HG changeset patch
+# User Raymond Lee <raymond@raysquare.com>
+# Date 1380236746 -28800
+# Node ID 41701d2c03414fb308a4233f5f69a0416008bf9c
+# Parent  a00aba84b699ea26bc3e90428938124d8dae6d26
+Bug 875731 - Replace callers of nsIDownloadManager.usersDownloadsDirectory with Downloads.getUserDownloadsDirectory mobile/andriod/. r=mfinkle
+
+diff --git a/mobile/android/components/HelperAppDialog.js b/mobile/android/components/HelperAppDialog.js
+--- a/mobile/android/components/HelperAppDialog.js
++++ b/mobile/android/components/HelperAppDialog.js
+@@ -8,16 +8,21 @@ const Cu = Components.utils;
+ const Cr = Components.results;
+ 
+ const PREF_BD_USEDOWNLOADDIR = "browser.download.useDownloadDir";
+ const URI_GENERIC_ICON_DOWNLOAD = "drawable://alert_download";
+ 
+ Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+ Cu.import("resource://gre/modules/Services.jsm");
+ 
++XPCOMUtils.defineLazyModuleGetter(this, "Downloads",
++                                  "resource://gre/modules/Downloads.jsm");
++XPCOMUtils.defineLazyModuleGetter(this, "Task",
++                                  "resource://gre/modules/Task.jsm");
++
+ // -----------------------------------------------------------------------
+ // HelperApp Launcher Dialog
+ // -----------------------------------------------------------------------
+ 
+ function HelperAppLauncherDialog() { }
+ 
+ HelperAppLauncherDialog.prototype = {
+   classID: Components.ID("{e9d277a0-268a-4ec2-bb8c-10fdf3e44611}"),
+@@ -25,25 +30,26 @@ HelperAppLauncherDialog.prototype = {
+ 
+   show: function hald_show(aLauncher, aContext, aReason) {
+     // Save everything by default
+     aLauncher.MIMEInfo.preferredAction = Ci.nsIMIMEInfo.useSystemDefault;
+     aLauncher.saveToDisk(null, false);
+   },
+ 
+   promptForSaveToFile: function hald_promptForSaveToFile(aLauncher, aContext, aDefaultFile, aSuggestedFileExt, aForcePrompt) {
+-    // Retrieve the user's default download directory
+-    let dnldMgr = Cc["@mozilla.org/download-manager;1"].getService(Ci.nsIDownloadManager);
+-    let defaultFolder = dnldMgr.userDownloadsDirectory;
++    return Task.spawn(function() {
++      // Retrieve the user's default download directory
++      let defaultFolder = yield Downloads.getPreferredDownloadsDirectory();
+ 
+-    try {
+-      file = this.validateLeafName(defaultFolder, aDefaultFile, aSuggestedFileExt);
+-    } catch (e) { }
++      try {
++        file = this.validateLeafName(defaultFolder, aDefaultFile, aSuggestedFileExt);
++      } catch (e) { }
+ 
+-    return file;
++      throw new Task.Result(file);
++    }.bind(this));
+   },
+ 
+   validateLeafName: function hald_validateLeafName(aLocalFile, aLeafName, aFileExt) {
+     if (!(aLocalFile && this.isUsableDirectory(aLocalFile)))
+       return null;
+ 
+     // Remove any leading periods, since we don't want to save hidden files
+     // automatically.
+