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Updated cache_valid_time option to check the update timestamp if update-notifier-common is installed.

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mtime of the apt lists is used as fallback.
This commit is contained in:
Ingo Gottwald 2013-04-24 22:21:38 +02:00
parent c4df662a7c
commit ad004d520f
1 changed files with 22 additions and 6 deletions
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28
library/apt
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@ -122,6 +122,7 @@ DPKG_OPTIONS = '-o "Dpkg::Options::=--force-confdef" -o "Dpkg::Options::=--force
APT_GET_ZERO = "0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded."
APTITUDE_ZERO = "0 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded."
APT_LISTS_PATH = "/var/lib/apt/lists"
APT_UPDATE_SUCCESS_STAMP_PATH = "/var/lib/apt/periodic/update-success-stamp"
def package_split(pkgspec):
parts = pkgspec.split('=')
@ -274,12 +275,27 @@ def main():
cache_valid = False
if p['cache_valid_time']:
tdelta = datetime.timedelta(seconds=p['cache_valid_time'])
mtime = os.stat(APT_LISTS_PATH).st_mtime
mtimestamp = datetime.datetime.fromtimestamp(mtime)
if mtimestamp + tdelta >= datetime.datetime.now():
# dont update the cache
# the old cache is less than cache_valid_time seconds old - so still valid
cache_valid = True
try:
mtime = os.stat(APT_UPDATE_SUCCESS_STAMP_PATH).st_mtime
except:
mtime = False
if mtime is False:
# Looks like the update-success-stamp is not available
# Fallback: Checking the mtime of the lists
try:
mtime = os.stat(APT_LISTS_PATH).st_mtime
except:
mtime = False
if mtime is False:
# No mtime could be read - looks like lists are not there
# We update the cache to be safe
cache_valid = False
else:
mtimestamp = datetime.datetime.fromtimestamp(mtime)
if mtimestamp + tdelta >= datetime.datetime.now():
# dont update the cache
# the old cache is less than cache_valid_time seconds old - so still valid
cache_valid = True
if cache_valid is not True:
cache.update()