230 lines
8.1 KiB
Python
230 lines
8.1 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
from __future__ import print_function
|
|
|
|
import difflib
|
|
import imp
|
|
import optparse
|
|
import os
|
|
import shlex
|
|
import subprocess
|
|
import sys
|
|
import time
|
|
import warnings
|
|
|
|
from django.core.management.templates import BaseCommand # noqa
|
|
|
|
# Suppress DeprecationWarnings which clutter the output to the point of
|
|
# rendering it unreadable.
|
|
warnings.simplefilter('ignore')
|
|
|
|
|
|
def get_module_path(module_name):
|
|
"""Gets the module path without importing anything.
|
|
|
|
Avoids conflicts with package dependencies.
|
|
(taken from http://github.com/sitkatech/pypatch)
|
|
"""
|
|
path = sys.path
|
|
for name in module_name.split('.'):
|
|
file_pointer, path, desc = imp.find_module(name, path)
|
|
path = [path, ]
|
|
if file_pointer is not None:
|
|
file_pointer.close()
|
|
|
|
return path[0]
|
|
|
|
|
|
class DirContext(object):
|
|
"""Change directory in a context manager.
|
|
|
|
This allows changing directory and to always fall back to the previous
|
|
directory whatever happens during execution.
|
|
|
|
Usage::
|
|
|
|
with DirContext('/home/foo') as dircontext:
|
|
# Some code happening in '/home/foo'
|
|
# We are back to the previous directory.
|
|
|
|
"""
|
|
|
|
def __init__(self, dirname):
|
|
self.prevdir = os.path.abspath(os.curdir)
|
|
os.chdir(dirname)
|
|
self.curdir = os.path.abspath(os.curdir)
|
|
|
|
def __enter__(self):
|
|
return self
|
|
|
|
def __exit__(self, exc_type, exc_value, traceback):
|
|
os.chdir(self.prevdir)
|
|
|
|
def __str__(self):
|
|
return self.curdir
|
|
|
|
|
|
class Command(BaseCommand):
|
|
option_list = BaseCommand.option_list + (
|
|
optparse.make_option(
|
|
'--gendiff',
|
|
action='store_true',
|
|
dest='gendiff',
|
|
default=False,
|
|
help=('Generate a diff file between local_settings.py and '
|
|
'local_settings.py.example'),
|
|
),
|
|
optparse.make_option(
|
|
'-f', '--force',
|
|
action='store_true',
|
|
dest='force',
|
|
default=False,
|
|
help=('Force destination rewriting without warning if the '
|
|
'destination file already exists.'),
|
|
),
|
|
)
|
|
|
|
help = ("Creates a local_settings.py file from the "
|
|
"local_settings.py.example template.")
|
|
|
|
time_fmt = '%Y-%m-%d %H:%M:%S %Z'
|
|
file_time_fmt = '%Y%m%d%H%M%S%Z'
|
|
|
|
local_settings_example = 'local_settings.py.example'
|
|
local_settings_file = 'local_settings.py'
|
|
local_settings_diff = 'local_settings.diff'
|
|
local_settings_reject_pattern = 'local_settings.py_%s.rej'
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super(Command, self).__init__(*args, **kwargs)
|
|
|
|
settings_file = os.path.abspath(
|
|
get_module_path(os.environ['DJANGO_SETTINGS_MODULE'])
|
|
)
|
|
|
|
self.local_settings_dir = os.path.abspath(
|
|
os.path.join(
|
|
os.path.realpath(os.path.dirname(settings_file)),
|
|
'local'
|
|
)
|
|
)
|
|
|
|
def gendiff(self, force=False):
|
|
"""Generate a diff between self.local_settings and the example file.
|
|
|
|
"""
|
|
|
|
with DirContext(self.local_settings_dir) as dircontext:
|
|
if not os.path.exists(self.local_settings_diff) or force:
|
|
with open(self.local_settings_example, 'r') as fp:
|
|
example_lines = fp.readlines()
|
|
with open(self.local_settings_file, 'r') as fp:
|
|
local_settings_lines = fp.readlines()
|
|
local_settings_example_mtime = time.strftime(
|
|
self.time_fmt,
|
|
time.localtime(
|
|
os.stat(self.local_settings_example).st_mtime)
|
|
)
|
|
|
|
local_settings_mtime = time.strftime(
|
|
self.time_fmt,
|
|
time.localtime(os.stat(self.local_settings_file).st_mtime)
|
|
)
|
|
|
|
print('generating "%s"...' % os.path.join(
|
|
dircontext.curdir,
|
|
self.local_settings_diff)
|
|
)
|
|
with open(self.local_settings_diff, 'w') as fp:
|
|
for line in difflib.unified_diff(
|
|
example_lines, local_settings_lines,
|
|
fromfile=self.local_settings_example,
|
|
tofile=self.local_settings_file,
|
|
fromfiledate=local_settings_example_mtime,
|
|
tofiledate=local_settings_mtime
|
|
):
|
|
fp.write(line)
|
|
print('\tDONE.')
|
|
sys.exit(0)
|
|
else:
|
|
sys.exit(
|
|
'"%s" already exists.' %
|
|
os.path.join(dircontext.curdir,
|
|
self.local_settings_diff)
|
|
)
|
|
|
|
def patch(self, force=False):
|
|
"""Patch local_settings.py.example with local_settings.diff.
|
|
|
|
The patch application generates the local_settings.py file (the
|
|
local_settings.py.example remains unchanged).
|
|
|
|
http://github.com/sitkatech/pypatch fails if the
|
|
local_settings.py.example file is not 100% identical to the one used to
|
|
generate the first diff so we use the patch command instead.
|
|
|
|
"""
|
|
|
|
with DirContext(self.local_settings_dir) as dircontext:
|
|
if os.path.exists(self.local_settings_diff):
|
|
if not os.path.exists(self.local_settings_file) or force:
|
|
local_settings_reject = \
|
|
self.local_settings_reject_pattern % (
|
|
time.strftime(self.file_time_fmt, time.localtime())
|
|
)
|
|
patch_cmd = shlex.split(
|
|
'patch %s %s -o %s -r %s' % (
|
|
self.local_settings_example,
|
|
self.local_settings_diff,
|
|
self.local_settings_file,
|
|
local_settings_reject
|
|
)
|
|
)
|
|
try:
|
|
subprocess.check_call(patch_cmd)
|
|
except subprocess.CalledProcessError:
|
|
if os.path.exists(local_settings_reject):
|
|
sys.exit(
|
|
'Some conflict(s) occurred. Please check "%s" '
|
|
'to find unapplied parts of the diff.\n'
|
|
'Once conflicts are solved, it is safer to '
|
|
'regenerate a newer diff with the "--gendiff" '
|
|
'option.' %
|
|
os.path.join(
|
|
dircontext.curdir,
|
|
local_settings_reject)
|
|
)
|
|
else:
|
|
sys.exit('An unhandled error occurred.')
|
|
print('Generation of "%s" successful.' % os.path.join(
|
|
dircontext.curdir,
|
|
self.local_settings_file)
|
|
)
|
|
sys.exit(0)
|
|
else:
|
|
sys.exit(
|
|
'"%s" already exists.' %
|
|
os.path.join(dircontext.curdir,
|
|
self.local_settings_file)
|
|
)
|
|
else:
|
|
sys.exit('No diff file found, please generate one with the '
|
|
'"--gendiff" option.')
|
|
|
|
def handle(self, *args, **options):
|
|
force = options.get('force')
|
|
if options.get('gendiff'):
|
|
self.gendiff(force)
|
|
else:
|
|
self.patch(force)
|