add ncm2 source support

.gitignore

@@ -1 +1,2 @@
 doc/tags
+*.pyc

autoload/ncm2_gtags.vim

@@ -0,0 +1,31 @@
+if get(s:, 'loaded', 0)
+  finish
+endif
+let s:loaded = 1
+
+let g:ncm2_gtags#proc = yarp#py3('ncm2_gtags')
+
+let g:ncm2_gtags#source = get(g:, 'ncm2_gtags#source', {
+      \ 'name': 'gtags',
+      \ 'priority': 6,
+      \ 'mark': 'gtags',
+      \ 'word_pattern': '[\w/]+',
+      \ 'on_complete': 'ncm2_gtags#on_complete',
+      \ 'on_warmup': 'ncm2_gtags#on_warmup'
+      \ })
+
+let g:ncm2_gtags#source = extend(g:ncm2_gtags#source,
+      \ get(g:, 'ncm2_gtags#source_override', {}),
+      \ 'force')
+
+func! ncm2_gtags#init()
+  call ncm2#register_source(g:ncm2_gtags#source)
+endfunc
+
+func! ncm2_gtags#on_warmup(ctx)
+  call g:ncm2_gtags#proc.jobstart()
+endfunc
+
+func! ncm2_gtags#on_complete(ctx)
+  call g:ncm2_gtags#proc.try_notify('on_complete', a:ctx)
+endfunc

ncm2-plugin/ncm2_gtags.vim

@@ -0,0 +1 @@
+call ncm2_gtags#init()

pythonx/cm_sources/gtags.py → pythonx/ncm2_gtags.py

@@ -1,34 +1,38 @@
 # -*- coding: utf-8 -*-
 
-from cm import register_source, Base
+import vim
+from ncm2 import Ncm2Source, getLogger, Popen
 import subprocess
+from distutils.spawn import find_executable
 
-register_source(name='gtags',
-                priority=6,
-                abbreviation='gtags',
-                word_pattern=r'\w+')
+logger = getLogger(__name__)
 
 
-class Source(Base):
+class Source(Ncm2Source):
 
     GTAGS_DB_NOT_FOUND_ERROR = 3
 
-    def __init__(self, nvim):
-        super().__init__(nvim)
-        self._checked = False
+    def check_executable(self):
+        if not find_executable('global'):
+            return False
+        else:
+            return True
 
     def is_word_valid_for_search(self, word):
         FORRBIDDEN_CHARACTERS = [
-                '^', '$', '{', '}', '(', ')', '.',
-                '*', '+', '[', ']', '?', '\\'
-                ]
+            '^', '$', '{', '}', '(', ')', '.',
+            '*', '+', '[', ']', '?', '\\'
+            ]
 
         for forbbiden_char in FORRBIDDEN_CHARACTERS:
             if forbbiden_char in word:
                 return False
         return True
 
-    def cm_refresh(self, info, ctx):
+    def on_complete(self, ctx):
+        if not self.check_executable():
+            return []
+
         base = ctx['base']
 
         if not self.is_word_valid_for_search(base):
@@ -56,4 +60,11 @@ def cm_refresh(self, info, ctx):
 
         matches = output[0].decode('utf8').splitlines()
 
-        self.complete(info, ctx, ctx['startcol'], matches)
+        logger.info('matches %s', matches)
+
+        self.complete(ctx, ctx['startccol'], matches)
+
+
+source = Source(vim)
+
+on_complete = source.on_complete

rplugin/python3/deoplete/sources/gtags.py

@@ -48,7 +48,6 @@ def gather_candidates(self, ctx):
             command.append('-i')
 
         proc = subprocess.Popen(command,
-                                cwd=ctx['cwd'],
                                 stdin=subprocess.PIPE,
                                 stdout=subprocess.PIPE,
                                 stderr=subprocess.DEVNULL)