Make the subprocesses work and return the right sys paths for the different versions

jedi/evaluate/compiled/subprocess/__init__.py

@@ -7,6 +7,7 @@ goals:
 2. Make it possible to handle different Python versions as well as virtualenvs.
 """
 
+import os
 import sys
 import subprocess
 import weakref
@@ -20,6 +21,8 @@ _PICKLE_PROTOCOL = 2
 
 _subprocesses = {}
 
+_MAIN_PATH = os.path.join(os.path.dirname(__file__), '__main__.py')
+
 
 def get_subprocess(executable):
     try:
@@ -88,8 +91,12 @@ class _Subprocess(object):
 
 class _CompiledSubprocess(_Subprocess):
     def __init__(self, executable):
+        parso_path = sys.modules['parso'].__file__
         super(_CompiledSubprocess, self).__init__(
-            (executable, '-m', 'jedi.evaluate.compiled.subprocess')
+            (executable,
+             _MAIN_PATH,
+             os.path.dirname(os.path.dirname(parso_path))
+             )
         )
 
     def run(self, evaluator, function, *args, **kwargs):

jedi/evaluate/compiled/subprocess/__main__.py

@@ -1,3 +1,15 @@
+import sys
+import os
+
+# Get the path to jedi.
+_d = os.path.dirname
+_jedi_path = _d(_d(_d(_d(_d(__file__)))))
+_parso_path = sys.argv[1]
+
+# This is kind of stupid. We actually don't want to modify the sys path but
+# simply import something from a specific location.
+sys.path[0:0] = [_jedi_path, _parso_path]
 from jedi.evaluate.compiled import subprocess
+sys.path[0:2] = []
 
 subprocess.Listener().listen()