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Fix activate_this.py does not exist, #406 #609

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Merged
merged 1 commit into from
Jan 11, 2016
Merged

Fix activate_this.py does not exist, #406 #609

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53 changes: 43 additions & 10 deletions pymode/virtualenv.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,8 @@
""" Support virtualenv in pymode. """

import os.path
import os
import sys
import site

from .environment import env

Expand All @@ -25,13 +27,44 @@ def enable_virtualenv():
activate_this = os.path.join(
os.path.join(path, 'Scripts'), 'activate_this.py')

f = open(activate_this)
try:
source = f.read()
exec(compile( # noqa
source, activate_this, 'exec'), dict(__file__=activate_this))
env.message('Activate virtualenv: ' + path)
env.let('g:pymode_virtualenv_enabled', path)
return True
finally:
f.close()
with open(activate_this) as f:
source = f.read()
exec(compile( # noqa
source, activate_this, 'exec'), dict(__file__=activate_this))
except IOError:
_activate_env_from_path(path)

env.message('Activate virtualenv: ' + path)
env.let('g:pymode_virtualenv_enabled', path)
return True


def _activate_env_from_path(env_path):
""" Fix when `activate_this.py` does not exist.

For Python 3.3 and newer, a new command-line tool `pyvenv` create venv
will not provide 'activate_this.py'.
"""
prev_sys_path = list(sys.path)

if sys.platform == 'win32':
site_packages_paths = [os.path.join(env_path, 'Lib', 'site-packages')]
else:
lib_path = os.path.join(env_path, 'lib')
site_packages_paths = [os.path.join(lib_path, lib, 'site-packages')
for lib in os.listdir(lib_path)]
for site_packages_path in site_packages_paths:
site.addsitedir(site_packages_path)

sys.real_prefix = sys.prefix
sys.prefix = env_path
sys.exec_prefix = env_path

# Move the added items to the front of the path:
new_sys_path = []
for item in list(sys.path):
if item not in prev_sys_path:
new_sys_path.append(item)
sys.path.remove(item)
sys.path[:0] = new_sys_path