Better handling of unknown extra conf files

Previously, we'd implicitly turn off future notices about unknown extra conf
files if we already raised one exception about it. This breaks when the user
ends up not receiving the "unknown extra conf, load?" message.

Now we only turn off the notice as a result of the user saying "don't load this"
so that if the first request fails to reach them, they'll get a second (and
third etc) request about it.

Fixes #615

python/ycm/client/event_notification.py

@@ -58,6 +58,8 @@ class EventNotification( BaseRequest ):
       except UnknownExtraConf as e:
           if vimsupport.Confirm( str( e ) ):
             _LoadExtraConfFile( e.extra_conf_file )
+          else:
+            _IgnoreExtraConfFile( e.extra_conf_file )
     except Exception as e:
       vimsupport.PostVimMessage( str( e ) )
 
@@ -91,3 +93,7 @@ def SendEventNotificationAsync( event_name, extra_data = None ):
 def _LoadExtraConfFile( filepath ):
   BaseRequest.PostDataToHandler( { 'filepath': filepath },
                                  'load_extra_conf_file' )
+
+def _IgnoreExtraConfFile( filepath ):
+  BaseRequest.PostDataToHandler( { 'filepath': filepath },
+                                 'ignore_extra_conf_file' )

python/ycm/completers/cpp/flags.py

@@ -22,11 +22,7 @@ import os
 import inspect
 from ycm import extra_conf_store
 from ycm.utils import ToUtf8IfNeeded
-
+from ycm.server.responses import NoExtraConfDetected
-NO_EXTRA_CONF_FILENAME_MESSAGE = ( 'No {0} file detected, so no compile flags '
-  'are available. Thus no semantic support for C/C++/ObjC/ObjC++. Go READ THE '
-  'DOCS *NOW*, DON\'T file a bug report.' ).format(
-    extra_conf_store.YCM_EXTRA_CONF_FILENAME )
 
 INCLUDE_FLAGS = [ '-isystem', '-I', '-iquote', '--sysroot=', '-isysroot',
                   '-include' ]
@@ -54,7 +50,7 @@ class Flags( object ):
       if not module:
         if not self.no_extra_conf_file_warning_posted:
           self.no_extra_conf_file_warning_posted = True
-          raise RuntimeError( NO_EXTRA_CONF_FILENAME_MESSAGE )
+          raise NoExtraConfDetected
         return None
 
       results = _CallExtraConfFlagsForFile( module,

python/ycm/extra_conf_store.py

@@ -27,11 +27,9 @@ import sys
 import logging
 from threading import Lock
 from ycm import user_options_store
-from ycm.server.responses import UnknownExtraConf
+from ycm.server.responses import UnknownExtraConf, YCM_EXTRA_CONF_FILENAME
 from fnmatch import fnmatch
 
-# Constants
-YCM_EXTRA_CONF_FILENAME = '.ycm_extra_conf.py'
 
 # Singleton variables
 _module_for_module_file = {}
@@ -95,7 +93,7 @@ def _CallGlobalExtraConfMethod( function_name ):
   getattr( module, function_name )()
 
 
-def _Disable( module_file ):
+def Disable( module_file ):
   """Disables the loading of a module for the current session."""
   with _module_for_module_file_lock:
     _module_for_module_file[ module_file ] = None
@@ -116,11 +114,6 @@ def _ShouldLoad( module_file ):
     if _MatchesGlobPattern( module_file, glob.lstrip('!') ):
       return not is_blacklisted
 
-  # We disable the file if it's unknown so that we don't ask the user about it
-  # repeatedly. Raising UnknownExtraConf should result in the client sending
-  # another request to load the module file if the user explicitly chooses to do
-  # that.
-  _Disable( module_file )
   raise UnknownExtraConf( module_file )
 
 
@@ -139,7 +132,7 @@ def Load( module_file, force = False ):
         return _module_for_module_file[ module_file ]
 
     if not _ShouldLoad( module_file ):
-      _Disable( module_file )
+      Disable( module_file )
       return None
 
   # This has to be here because a long time ago, the ycm_extra_conf.py files

python/ycm/server/handlers.py

@@ -146,6 +146,13 @@ def LoadExtraConfFile():
   extra_conf_store.Load( request_data[ 'filepath' ], force = True )
 
 
+@app.post( '/ignore_extra_conf_file' )
+def IgnoreExtraConfFile():
+  LOGGER.info( 'Received extra conf ignore request' )
+  request_data = request.json
+  extra_conf_store.Disable( request_data[ 'filepath' ] )
+
+
 @app.post( '/debug_info' )
 def DebugInfo():
   LOGGER.info( 'Received debug info request' )

python/ycm/server/responses.py

@@ -19,9 +19,16 @@
 
 import os
 
+YCM_EXTRA_CONF_FILENAME = '.ycm_extra_conf.py'
+
 CONFIRM_CONF_FILE_MESSAGE = ('Found {0}. Load? \n\n(Question can be turned '
                              'off with options, see YCM docs)')
 
+NO_EXTRA_CONF_FILENAME_MESSAGE = ( 'No {0} file detected, so no compile flags '
+  'are available. Thus no semantic support for C/C++/ObjC/ObjC++. Go READ THE '
+  'DOCS *NOW*, DON\'T file a bug report.' ).format( YCM_EXTRA_CONF_FILENAME )
+
+
 class ServerError( Exception ):
   def __init__( self, message ):
     super( ServerError, self ).__init__( message )
@@ -34,6 +41,11 @@ class UnknownExtraConf( ServerError ):
     self.extra_conf_file = extra_conf_file
 
 
+class NoExtraConfDetected( ServerError ):
+  def __init__( self ):
+    super( NoExtraConfDetected, self ).__init__(
+      NO_EXTRA_CONF_FILENAME_MESSAGE )
+
 
 def BuildGoToResponse( filepath, line_num, column_num, description = None ):
   response = {

python/ycm/server/tests/get_completions_test.py

@@ -27,7 +27,8 @@ from webtest import TestApp, AppError
 from nose.tools import eq_, with_setup
 from hamcrest import ( assert_that, has_item, has_items, has_entry,
                        contains_inanyorder, empty )
-from ..responses import BuildCompletionData, UnknownExtraConf
+from ..responses import ( BuildCompletionData, UnknownExtraConf,
+                          NoExtraConfDetected )
 from .. import handlers
 import bottle
 
@@ -239,6 +240,9 @@ def GetCompletions_ClangCompleter_UnknownExtraConfException_test():
   completion_data = BuildRequest( filepath = filepath,
                                   filetype = 'cpp',
                                   contents = open( filepath ).read(),
+                                  line_num = 10,
+                                  column_num = 6,
+                                  start_column = 6,
                                   force_semantic = True )
 
   response = app.post_json( '/completions',
@@ -250,6 +254,18 @@ def GetCompletions_ClangCompleter_UnknownExtraConfException_test():
                has_entry( 'exception',
                           has_entry( 'TYPE', UnknownExtraConf.__name__ ) ) )
 
+  app.post_json( '/ignore_extra_conf_file',
+                 { 'filepath': PathToTestFile( '.ycm_extra_conf.py' ) } )
+
+  response = app.post_json( '/completions',
+                            completion_data,
+                            expect_errors = True )
+
+  eq_( response.status_code, httplib.INTERNAL_SERVER_ERROR )
+  assert_that( response.json,
+               has_entry( 'exception',
+                          has_entry( 'TYPE', NoExtraConfDetected.__name__ ) ) )
+
 
 @with_setup( Setup )
 def GetCompletions_ClangCompleter_WorksWhenExtraConfExplicitlyAllowed_test():