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Use default OS shell to run system commands...
Use default OS shell to run system commands Instead of using os.system which uses /bin/sh, this uses subprocess.call (the replacement of os.system) to run the command using the default shell of the OS. With this, one can use more advanced commands for bash, zsh, ksh, ... I also edited the docstring, added comments and fixed the handling of return codes.

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submodule.py
92 lines | 2.8 KiB | text/x-python | PythonLexer
"""utilities for checking submodule status"""
#-----------------------------------------------------------------------------
# Copyright (C) 2013 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
import os
import subprocess
import sys
#-----------------------------------------------------------------------------
# Globals
#-----------------------------------------------------------------------------
pjoin = os.path.join
#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------
def ipython_parent():
"""return IPython's parent (i.e. root if run from git)"""
from IPython.utils.path import get_ipython_package_dir
return os.path.abspath(os.path.dirname(get_ipython_package_dir()))
def ipython_submodules(root):
"""return IPython submodules relative to root"""
return [
pjoin(root, 'IPython', 'html', 'static', 'components'),
]
def is_repo(d):
"""is d a git repo?"""
return os.path.exists(pjoin(d, '.git'))
def check_submodule_status(root=None):
"""check submodule status
Has three return values:
'missing' - submodules are absent
'unclean' - submodules have unstaged changes
'clean' - all submodules are up to date
"""
if hasattr(sys, "frozen"):
# frozen via py2exe or similar, don't bother
return 'clean'
if not root:
root = ipython_parent()
if not is_repo(root):
# not in git, assume clean
return 'clean'
submodules = ipython_submodules(root)
for submodule in submodules:
if not os.path.exists(submodule):
return 'missing'
# check with git submodule status
proc = subprocess.Popen('git submodule status',
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
shell=True,
cwd=root,
)
status, _ = proc.communicate()
status = status.decode("ascii")
for line in status.splitlines():
if status.startswith('-'):
return 'missing'
elif status.startswith('+'):
return 'unclean'
return 'clean'
def update_submodules(repo_dir):
"""update submodules in a repo"""
subprocess.check_call("git submodule init", cwd=repo_dir, shell=True)
subprocess.check_call("git submodule update --recursive", cwd=repo_dir, shell=True)