Makes filter step continue on if error

scripts/slave/recipe_modules/filter/api.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import re
 
 from slave import recipe_api
 
 class FilterApi(recipe_api.RecipeApi):
   def __init__(self, **kwargs):
@@ skipping 57 matching lines @@
         self._result = 1
         return
 
     analyze_input = {'files': paths, 'targets': self._matching_exes}
 
     test_output = {'status': 'No dependency', 'targets': []}
 
     kwargs.setdefault('env', {})
     kwargs['env'].update(self.m.chromium.c.gyp_env.as_jsonish())
 
-    step_result = self.m.python('analyze',
-                        self.m.path['checkout'].join('build', 'gyp_chromium'),
-                        args=['--analyzer2',
-                              self.m.json.input(analyze_input),
-                              self.m.json.output()],
-                        step_test_data=lambda: self.m.json.test_api.output(
-                          test_output),
-                        **kwargs)
+    try:
+      step_result = self.m.python('analyze',
+                          self.m.path['checkout'].join('build', 'gyp_chromium'),
+                          args=['--analyzer2',
+                                self.m.json.input(analyze_input),
+                                self.m.json.output()],
+                          step_test_data=lambda: self.m.json.test_api.output(
+                            test_output),
+                          **kwargs)
+    except self.m.step.StepFailure as f:
+      # Continue on if there is an error executing python. Most likely runhooks
+      # will fail too, but errors there are more well understood than here.
+      self._result = True
+      step_result = f.result
+      step_result.presentation.status = 'WARNING'
+      return
+
     if 'error' in step_result.json.output:
       self._result = True
       step_result.presentation.step_text = 'Error: ' + \
           step_result.json.output['error']
     elif step_result.json.output['status'] == 'Found dependency':
       self._matching_exes = step_result.json.output['targets']
       self._result = True
     else:
       step_result.presentation.step_text = 'No compile necessary'