dan's mercurial stuff

--HG--
branch : pmacs2

application.py

@@ -98,7 +98,7 @@ class Application(object):
             'method', 'method.svn', 'method.cvs', 'method.search',
             'method.buffers', 'method.move', 'method.shell',
             'method.introspect', 'method.help', 'method.numbers',
-            'method.spell',
+            'method.spell', 'method.hg',
         )
         for name in names:
             exec("import %s" % name)

method/hg.py

@@ -0,0 +1,32 @@
+try:
+    import mercurial
+    from mercurial import hg
+    from mercurial import ui
+    from mercurial import commands as hgc
+    has_hg = True
+except ImportError:
+    has_hg = False
+
+import buffer, default, dirutil, lex, regex, util, window
+from point import Point
+
+from method import Method, Argument
+
+class HgDiff(Method):
+    """
+
+    """
+    def _execute(self, w, **vargs):
+        if not has_hg:
+            w.set_error("Mecurial is not installed")
+            return
+        elif not hasattr(w.buffer, 'path'):
+            w.set_error("Buffer has no corresponding file")
+            return
+        ui_imp = ui.ui(verbose=True)
+        repo = hg.repository(ui=ui_imp, path='.')
+        ui_imp.pushbuffer()
+        hgc.diff(ui_imp, repo, w.buffer.path)
+        data = ui_imp.popbuffer()
+        w.application.data_buffer("*Diff*", "".join(data), 
+                                  switch_to=True, modename='diff')