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better fix for arch version detection (#15705)

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* better fix for arch version detection

fixes  #15696

* be extra safe about tracebacks in facts.py

* add comments to explain the setup
* make allowempty more conservative, ignore file content
* wrap function call in try/except
  * should never happen, but if it happens the bug should be distribtion=N/A and not a traceback
This commit is contained in:
Robin Roth 2016-05-04 21:32:08 +02:00 committed by Toshio Kuratomi
parent 4f7a0925fd
commit 56ba10365c
1 changed files with 22 additions and 16 deletions
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38
lib/ansible/module_utils/facts.py
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@ -604,6 +604,10 @@ class Distribution(object):
This is unit tested. Please extend the tests to cover all distributions if you have them available.
"""
# every distribution name mentioned here, must have one of
# - allowempty == True
# - be listed in SEARCH_STRING
# - have a function get_distribution_DISTNAME implemented
OSDIST_LIST = (
{'path': '/etc/oracle-release', 'name': 'OracleLinux'},
{'path': '/etc/slackware-version', 'name': 'Slackware'},
@ -687,12 +691,12 @@ class Distribution(object):
if not os.path.exists(path):
continue
# if allowempty is set, we only check for file existance but not content
if 'allowempty' in ddict and ddict['allowempty']:
self.facts['distribution'] = name
break
if os.path.getsize(path) == 0:
if 'allowempty' in ddict and ddict['allowempty']:
self.facts['distribution'] = name
break
else:
continue
continue
data = get_file_content(path)
if name in self.SEARCH_STRING:
@ -707,13 +711,19 @@ class Distribution(object):
break
else:
# call a dedicated function for parsing the file content
distfunc = getattr(self, 'get_distribution_' + name)
parsed = distfunc(name, data, path)
if parsed is None or parsed:
# distfunc return False if parsing failed
# break only if parsing was succesful
# otherwise continue with other distributions
break
try:
distfunc = getattr(self, 'get_distribution_' + name)
parsed = distfunc(name, data, path)
if parsed is None or parsed:
# distfunc return False if parsing failed
# break only if parsing was succesful
# otherwise continue with other distributions
break
except AttributeError:
# this should never happen, but if it does fail quitely and not with a traceback
pass
# to debug multiple matching release files, one can use:
# self.facts['distribution_debug'].append({path + ' ' + name:
@ -780,10 +790,6 @@ class Distribution(object):
if release:
self.facts['distribution_release'] = release.groups()[0]
def get_distribution_Archlinux(self, name, data, path):
self.facts['distribution'] = 'Archlinux'
self.facts['distribution_version'] = data
def get_distribution_Alpine(self, name, data, path):
self.facts['distribution'] = 'Alpine'
self.facts['distribution_version'] = data