Allow passing explicit environment variables to Jedi environment

pyls/workspace.py

@@ -226,14 +226,22 @@ def jedi_names(self, all_scopes=False, definitions=True, references=False):
     def jedi_script(self, position=None):
         extra_paths = []
         environment_path = None
+        env_vars = None
 
         if self._config:
             jedi_settings = self._config.plugin_settings('jedi', document_path=self.path)
             environment_path = jedi_settings.get('environment')
             extra_paths = jedi_settings.get('extra_paths') or []
+            env_vars = jedi_settings.get('env_vars')
 
-        environment = self.get_enviroment(environment_path) if environment_path else None
-        sys_path = self.sys_path(environment_path) + extra_paths
+        # Drop PYTHONPATH from env_vars before creating the environment because that makes
+        # Jedi throw an error.
+        if env_vars is None:
+            env_vars = os.environ.copy()
+        env_vars.pop('PYTHONPATH', None)
+
+        environment = self.get_enviroment(environment_path, env_vars=env_vars) if environment_path else None
+        sys_path = self.sys_path(environment_path, env_vars=env_vars) + extra_paths
         project_path = self._workspace.root_path
 
         kwargs = {
@@ -249,22 +257,25 @@ def jedi_script(self, position=None):
 
         return jedi.Script(**kwargs)
 
-    def get_enviroment(self, environment_path=None):
+    def get_enviroment(self, environment_path=None, env_vars=None):
         # TODO(gatesn): #339 - make better use of jedi environments, they seem pretty powerful
         if environment_path is None:
             environment = jedi.api.environment.get_cached_default_environment()
         else:
             if environment_path in self._workspace._environments:
                 environment = self._workspace._environments[environment_path]
             else:
-                environment = jedi.api.environment.create_environment(path=environment_path, safe=False)
+                environment = jedi.api.environment.create_environment(path=environment_path,
+                                                                      safe=False,
+                                                                      env_vars=env_vars)
                 self._workspace._environments[environment_path] = environment
 
         return environment
 
-    def sys_path(self, environment_path=None):
+    def sys_path(self, environment_path=None, env_vars=None):
         # Copy our extra sys path
+        # TODO: when safe to break API, use env_vars explicitly to pass to create_environment
         path = list(self._extra_sys_path)
-        environment = self.get_enviroment(environment_path=environment_path)
+        environment = self.get_enviroment(environment_path=environment_path, env_vars=env_vars)
         path.extend(environment.get_sys_path())
         return path

setup.py

@@ -10,7 +10,7 @@
         'configparser; python_version<"3.0"',
         'future>=0.14.0; python_version<"3"',
         'backports.functools_lru_cache; python_version<"3.2"',
-        'jedi>=0.17.0,<0.18.0',
+        'jedi>=0.17.2,<0.18.0',
         'python-jsonrpc-server>=0.4.0',
         'pluggy',
         'ujson<=2.0.3 ; platform_system!="Windows" and python_version<"3.0"',

vscode-client/package.json

@@ -40,6 +40,11 @@
                     "default": [],
                     "description": "Define extra paths for jedi.Script."
                 },
+                "pyls.plugins.jedi.env_vars": {
+                    "type": "dictionary",
+                    "default": null,
+                    "description": "Define environment variables for jedi.Script and Jedi.names."
+                },
                 "pyls.plugins.jedi.environment": {
                     "type": "string",
                     "default": null,