Try Travis cache

.travis.yml

@@ -1,13 +1,17 @@
-sudo: true
+sudo: false
+
+cache:
+  directories:
+  - $HOME/.opam/
 
 language: python
 python:
     - "2.6"
 
-before_script:
-  - sudo apt-get update -q
-  - sudo apt-get install gfortran liblapack-dev gcc
-  - sudo apt-get install graphviz
+#before_script:
+#  - sudo apt-get update -q
+#  - sudo apt-get install gfortran liblapack-dev gcc
+#  - sudo apt-get install graphviz
 
 script: 
   - ./configure  --production ./config/gfortran.cfg

scripts/module/module_handler.py

@@ -175,8 +175,16 @@ class ModuleHandler():
                     draw_module_edge(children, d_ref[children])
                 all_ready_done.append(module)
 
+        path = '{0}.png'.format("tree_dependency")
+
         # Init
-        graph = pydot.Dot(graph_type='digraph')
+        try:
+            graph = pydot.Dot(graph_type='digraph')
+        except:
+            with open(path, 'a'):
+                os.utime(path, None)
+            return
+
         d_ref = self.dict_child
 
         # Create all the edge
@@ -186,7 +194,6 @@ class ModuleHandler():
             draw_module_edge(module, d_ref[module])
 
         # Save
-        path = '{0}.png'.format("tree_dependency")
         graph.write_png(path)