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Make varReplace recursive instead of iterative

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Daniel Hokka Zakrisson 2012-09-25 15:43:15 +02:00 committed by Michael DeHaan
parent d181a64315
commit 84f98534ae
1 changed files with 10 additions and 11 deletions
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21
lib/ansible/utils.py
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@ -176,12 +176,13 @@ _LISTRE = re.compile(r"(\w+)\[(\d+)\]")
class VarNotFoundException(Exception):
pass
def _varLookup(name, vars):
def _varLookup(name, vars, depth=0):
''' find the contents of a possibly complex variable in vars. '''
path = name.split('.')
space = vars
for part in path:
part = varReplace(part, vars, depth=depth + 1)
if part in space:
space = space[part]
elif "[" in part:
@ -196,7 +197,7 @@ def _varLookup(name, vars):
raise VarNotFoundException()
return space
_KEYCRE = re.compile(r"\$(?P<complex>\{){0,1}((?(complex)[\w\.\[\]]+|\w+))(?(complex)\})")
_KEYCRE = re.compile(r"\$(?P<complex>\{){0,1}((?(complex)[\w\.\[\]\$\{\}]+|\w+))(?(complex)\})")
def varLookup(varname, vars):
''' helper function used by with_items '''
@ -209,10 +210,13 @@ def varLookup(varname, vars):
except VarNotFoundException:
return None
def varReplace(raw, vars, do_repr=False):
def varReplace(raw, vars, do_repr=False, depth=0):
''' Perform variable replacement of $variables in string raw using vars dictionary '''
# this code originally from yum
if (depth > 20):
raise errors.AnsibleError("template recursion depth exceeded")
done = [] # Completed chunks to return
while raw:
@ -225,7 +229,8 @@ def varReplace(raw, vars, do_repr=False):
# original)
try:
replacement = unicode(_varLookup(m.group(2), vars))
replacement = unicode(_varLookup(m.group(2), vars, depth))
replacement = varReplace(replacement, vars, depth=depth + 1)
except VarNotFoundException:
replacement = m.group()
@ -286,13 +291,7 @@ def template(basedir, text, vars, do_repr=False):
text = text.decode('utf-8')
except UnicodeEncodeError:
pass # already unicode
depth = 0
while prev_text != text:
depth = depth + 1
if (depth > 20):
raise errors.AnsibleError("template recursion depth exceeded")
prev_text = text
text = varReplace(unicode(text), vars, do_repr)
text = varReplace(unicode(text), vars, do_repr)
text = varReplaceFilesAndPipes(basedir, text)
return text