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Native Jinja2: raise undefined error immediately (#52237)

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Fixes #52158
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Martin Krizek 2019-02-15 19:36:12 +01:00 • committed by GitHub
parent 02c9f70898
commit 50d7483632
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12
lib/ansible/template/native_helpers.py
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@ -12,6 +12,7 @@ import types
from jinja2._compat import text_type
from jinja2.runtime import StrictUndefined
from ansible.parsing.yaml.objects import AnsibleVaultEncryptedUnicode
@ -37,6 +38,17 @@ def ansible_native_concat(nodes):
if isinstance(out, AnsibleVaultEncryptedUnicode):
return out.data
if isinstance(out, StrictUndefined):
# A hack to raise proper UndefinedError/AnsibleUndefinedVariable exception.
# We need to access the AnsibleUndefined(StrictUndefined) object by either of the following:
# __iter__, __str__, __len__, __nonzero__, __eq__, __ne__, __bool__, __hash__
# to actually raise the exception.
# (see Jinja2 source of StrictUndefined to get up to date info)
# Otherwise the undefined error would be raised on the next access which might not be properly handled.
# See https://github.com/ansible/ansible/issues/52158
# We do that only here because it is taken care of by text_type() in the else block below already.
str(out)
# short circuit literal_eval when possible
if not isinstance(out, list):
return out