NativeFiletypeCompletionAvailable now a local call

It used to block on the server to get the data. Now it doesn't anymore. This
speeds up Vim startup.

autoload/youcompleteme.vim

@@ -308,8 +308,6 @@ function! s:SetCompleteFunc()
   let &completefunc = 'youcompleteme#Complete'
   let &l:completefunc = 'youcompleteme#Complete'
 
-  " TODO: This makes startup slower because it blocks on the server. Explore
-  " other options.
   if pyeval( 'ycm_state.NativeFiletypeCompletionUsable()' )
     let &omnifunc = 'youcompleteme#OmniComplete'
     let &l:omnifunc = 'youcompleteme#OmniComplete'

python/ycm/completers/completer_utils.py

@@ -19,6 +19,7 @@
 
 from collections import defaultdict
 from copy import deepcopy
+import os
 
 DEFAULT_FILETYPE_TRIGGERS = {
   'c' : ['->', '.'],
@@ -63,3 +64,15 @@ def TriggersForFiletype( user_triggers ):
 
   return _FiletypeDictUnion( default_triggers, dict( user_triggers ) )
 
+
+def _PathToCompletersFolder():
+  dir_of_current_script = os.path.dirname( os.path.abspath( __file__ ) )
+  return os.path.join( dir_of_current_script )
+
+
+def PathToFiletypeCompleterPluginLoader( filetype ):
+  return os.path.join( _PathToCompletersFolder(), filetype, 'hook.py' )
+
+
+def FiletypeCompleterExistsForFiletype( filetype ):
+  return os.path.exists( PathToFiletypeCompleterPluginLoader( filetype ) )

python/ycm/server/server_state.py

@@ -22,6 +22,7 @@ import os
 from ycm import extra_conf_store
 from ycm.utils import ForceSemanticCompletion
 from ycm.completers.general.general_completer_store import GeneralCompleterStore
+from ycm.completers.completer_utils import PathToFiletypeCompleterPluginLoader
 
 
 class ServerState( object ):
@@ -52,8 +53,7 @@ class ServerState( object ):
     except KeyError:
       pass
 
-    module_path = _PathToFiletypeCompleterPluginLoader( filetype )
-
+    module_path = PathToFiletypeCompleterPluginLoader( filetype )
     completer = None
     supported_filetypes = [ filetype ]
     if os.path.exists( module_path ):
@@ -114,14 +114,3 @@ class ServerState( object ):
         'filetype_specific_completion_to_disable' ]
     return not all([ x in filetype_to_disable for x in current_filetypes ])
 
-
-
-def _PathToCompletersFolder():
-  dir_of_current_script = os.path.dirname( os.path.abspath( __file__ ) )
-  return os.path.join( dir_of_current_script, '..', 'completers' )
-
-
-def _PathToFiletypeCompleterPluginLoader( filetype ):
-  return os.path.join( _PathToCompletersFolder(), filetype, 'hook.py' )
-
-

python/ycm/youcompleteme.py

@@ -26,6 +26,7 @@ from ycm import vimsupport
 from ycm import utils
 from ycm.completers.all.omni_completer import OmniCompleter
 from ycm.completers.general import syntax_parse
+from ycm.completers.completer_utils import FiletypeCompleterExistsForFiletype
 from ycm.client.base_request import BaseRequest, BuildRequestData
 from ycm.client.command_request import SendCommandRequest
 from ycm.client.completion_request import CompletionRequest
@@ -121,11 +122,8 @@ class YouCompleteMe( object ):
 
 
   def NativeFiletypeCompletionAvailable( self ):
-    try:
-      return _NativeFiletypeCompletionAvailableForFile(
-        vimsupport.GetCurrentBufferFilepath() )
-    except:
-      return False
+    return any( [ FiletypeCompleterExistsForFiletype( x ) for x in
+                  vimsupport.CurrentFiletypes() ] )
 
 
   def NativeFiletypeCompletionUsable( self ):
@@ -252,14 +250,3 @@ def _AddUltiSnipsDataIfNeeded( extra_data ):
   extra_data[ 'ultisnips_snippets' ] = [ { 'trigger': x.trigger,
                                            'description': x.description
                                          } for x in rawsnips ]
-
-
-# 'filepath' is here only as a key for Memoize
-# This can't be a nested function inside NativeFiletypeCompletionAvailable
-# because then the Memoize decorator wouldn't work (nested functions are
-# re-created on every call to the outer function).
-@utils.Memoize
-def _NativeFiletypeCompletionAvailableForFile( filepath ):
-  return BaseRequest.PostDataToHandler( BuildRequestData(),
-                                        'filetype_completion_available')
-