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Backup configuration file before overwrite it.

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This commit is contained in:
Antoine Nguyen
2015-11-02 21:03:28 +01:00
parent 7d3ee4c07e
commit b298a5b77f
1 changed files with 6 additions and 2 deletions
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8
modoboa_installer/utils.py
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@@ -3,6 +3,7 @@
import contextlib import contextlib
import datetime import datetime
import os import os
import shutil
import string import string
import subprocess import subprocess
import sys import sys
@@ -104,13 +105,16 @@ class ConfigFileTemplate(string.Template):
def copy_from_template(template, dest, context): def copy_from_template(template, dest, context):
"""Create and copy a configuration file from a template.""" """Create and copy a configuration file from a template."""
now = datetime.datetime.now().isoformat()
with open(template) as fp: with open(template) as fp:
buf = fp.read() buf = fp.read()
if os.path.exists(dest):
bak_name = "{}.{}.{}".format(dest, "old", now)
shutil.copy(dest, bak_name)
with open(dest, "w") as fp: with open(dest, "w") as fp:
now = datetime.datetime.now()
fp.write( fp.write(
"# This file was automatically installed on {}\n" "# This file was automatically installed on {}\n"
.format(now.isoformat())) .format(now))
fp.write(ConfigFileTemplate(buf).substitute(context)) fp.write(ConfigFileTemplate(buf).substitute(context))