Resolves cwd problem

pre_commit/languages/python.py

@@ -1,34 +1,35 @@
 
 import contextlib
-from plumbum import local
+
 from pre_commit.languages import helpers
 
+
 PY_ENV = 'py_env'
 
 
 class PythonEnv(helpers.Environment):
     @property
     def env_prefix(self):
-        return '. {0}/bin/activate &&'.format(PY_ENV)
+        return '. {{prefix}}{0}/bin/activate &&'.format(PY_ENV)
 
 
 @contextlib.contextmanager
-def in_env():
-    yield PythonEnv()
+def in_env(repo_cmd_runner):
+    yield PythonEnv(repo_cmd_runner)
 
 
-def install_environment():
-    assert local.path('setup.py').exists()
+def install_environment(repo_cmd_runner):
+    assert repo_cmd_runner.exists('setup.py')
     # Return immediately if we already have a virtualenv
-    if local.path(PY_ENV).exists():
+    if repo_cmd_runner.exists(PY_ENV):
         return
 
     # Install a virtualenv
-    local['virtualenv'][PY_ENV]()
-    with in_env() as env:
-        env.run('pip install .')
+    repo_cmd_runner.run(['virtualenv', '{{prefix}}{0}'.format(PY_ENV)])
+    with in_env(repo_cmd_runner) as env:
+        env.run('cd {0} && pip install .'.format(repo_cmd_runner.prefix_dir))
 
 
-def run_hook(hook, file_args):
-    with in_env() as env:
+def run_hook(repo_cmd_runner, hook, file_args):
+    with in_env(repo_cmd_runner) as env:
         return helpers.run_hook(env, hook, file_args)