use python-deps to handle missing dependencies.

Apply it to gst python module.

morituri/common/Makefile.am

@@ -9,6 +9,7 @@ morituri_PYTHON = \
 	cache.py \
 	common.py \
 	config.py \
+	deps.py \
 	directory.py \
 	drive.py \
 	encode.py \

morituri/common/deps.py

@@ -0,0 +1,34 @@
+# -*- Mode: Python -*-
+# vi:si:et:sw=4:sts=4:ts=4
+
+import os
+import urllib
+
+from morituri.extern.deps import deps
+
+
+class DepsHandler(deps.DepsHandler):
+
+    def __init__(self, name='morituri'):
+        deps.DepsHandler.__init__(self, name)
+
+        self.add(GStPython())
+
+    def report(self, summary):
+        reporter = os.environ.get('EMAIL_ADDRESS', None)
+        get = "summary=%s" % urllib.quote(summary)
+        if reporter:
+            get += "&reporter=%s" % urllib.quote(reporter)
+        return 'http://thomas.apestaart.org/morituri/trac/newticket?' + get
+
+
+class GStPython(deps.Dependency):
+    module = 'gst'
+    name = "GStreamer Python bindings"
+    homepage = "http://gstreamer.freedesktop.org"
+
+    def Fedora_install(self, distro):
+        return self.Fedora_yum('gstreamer-python')
+
+    #def Ubuntu_install(self, distro):
+    #    pass