fix for completion (aka Intellisense) pathnames for WSL Bash and Cygwin (DonJayamanne#1049)

- detect Windows hosts with Python running in WSL or Cygwin - ignore Python running in Windows - ignore other hosts like Linux, Osx, etc. - alter absolute and relative paths - can be combined with a batch file and VSCode settings change to enable full linting and completition

Author: diablodale

pythonFiles/completion.py

@@ -4,6 +4,7 @@
 import sys
 import json
 import traceback
+import platform
 
 WORD_RE = re.compile(r'\w')
 jediPreview = False
@@ -20,6 +21,17 @@ class JediCompletion(object):
  def __init__(self):
  self.default_sys_path = sys.path
  self._input = io.open(sys.stdin.fileno(), encoding='utf-8')
+ if (os.path.sep == '/') and (platform.uname()[2].find('Microsoft') > -1):
+ # WSL; does not support UNC paths
+ self.drive_mount = '/mnt/'
+ elif sys.platform == 'cygwin':
+ # cygwin
+ self.drive_mount = '/cygdrive/'
+ else:
+ # Do no normalization, e.g. Windows build of Python.
+ # Could add additional test: ((os.path.sep == '/') and os.path.isdir('/mnt/c'))
+ # However, this may have more false positives trying to identify Windows/*nix hybrids
+ self.drive_mount = ''
 
  def _get_definition_type(self, definition):
  is_built_in = definition.in_builtin_module
@@ -520,13 +532,33 @@ def _set_request_config(self, config):
  if path and path not in sys.path:
  sys.path.insert(0, path)
 
+ def _normalize_request_path(self, request):
+ """Normalize any Windows paths received by a *nix build of
+ Python. Does not alter the reverse os.path.sep=='\\',
+ i.e. *nix paths received by a Windows build of Python.
+ """
+ if 'path' in request:
+ if not self.drive_mount:
+ return
+ newPath = request['path'].replace('\\', '/')
+ if newPath[0:1] == '/':
+ # is absolute path with no drive letter
+ request['path'] = newPath
+ elif newPath[1:2] == ':':
+ # is path with drive letter, only absolute can be mapped
+ request['path'] = self.drive_mount + newPath[0:1].lower() + newPath[2:]
+ else:
+ # is relative path
+ request['path'] = newPath
+
  def _process_request(self, request):
  """Accept serialized request from VSCode and write response.
  """
  request = self._deserialize(request)
 
  self._set_request_config(request.get('config', {}))
 
+ self._normalize_request_path(request)
  path = self._get_top_level_module(request.get('path', ''))
  if path not in sys.path:
  sys.path.insert(0, path)