openstack/os-collect-config
Code Issues Proposed changes

Atomically replace files

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Clint Byrum
2013-03-15 09:18:31 -07:00
parent 28365000ca
commit 57a2265ebb
1 changed files with 4 additions and 1 deletions
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5
os_config_applier/os_config_applier.py
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@@ -10,6 +10,7 @@ from pystache.context import KeyNotFoundError
from subprocess import Popen, PIPE from subprocess import Popen, PIPE
from value_types import * from value_types import *
from config_exception import * from config_exception import *
from tempfile import NamedTemporaryFile
TEMPLATES_DIR = os.environ.get('OS_CONFIG_APPLIER_TEMPLATES', TEMPLATES_DIR = os.environ.get('OS_CONFIG_APPLIER_TEMPLATES',
'/opt/stack/os-config-applier/templates') '/opt/stack/os-config-applier/templates')
@@ -37,7 +38,9 @@ def write_file(path, contents):
logger.info("writing %s", path) logger.info("writing %s", path)
d = os.path.dirname(path) d = os.path.dirname(path)
os.path.exists(d) or os.makedirs(d) os.path.exists(d) or os.makedirs(d)
with open(path, 'w') as f: f.write(contents) with NamedTemporaryFile(dir=d, delete=False) as newfile:
newfile.write(contents)
os.rename(newfile.name, path)
# return a map of filenames->filecontents # return a map of filenames->filecontents
def build_tree(templates, config): def build_tree(templates, config):