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Merge pull request #346 from jhoekx/improve-varreplace

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Support nested variables in varReplace
This commit is contained in:
Michael DeHaan 2012-05-09 17:25:07 -07:00
commit cb6f0f4284
3 changed files with 173 additions and 5 deletions
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21
lib/ansible/utils.py
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@ -199,7 +199,19 @@ def parse_json(data):
return { "failed" : True, "parsed" : False, "msg" : data }
return results
_KEYCRE = re.compile(r"\$(\w+)")
def varLookup(name, vars):
''' find the contents of a possibly complex variable in vars. '''
path = name.split('.')
space = vars
for part in path:
if part in space:
space = space[part]
else:
return
return space
_KEYCRE = re.compile(r"\$(?P<complex>\{){0,1}((?(complex)[\w\.]+|\w+))(?(complex)\})")
# if { -> complex if complex, allow . and need trailing }
def varReplace(raw, vars):
'''Perform variable replacement of $vars
@ -221,8 +233,9 @@ def varReplace(raw, vars):
# Determine replacement value (if unknown variable then preserve
# original)
varname = m.group(1).lower()
replacement = str(vars.get(varname, m.group()))
varname = m.group(2).lower()
replacement = str(varLookup(varname, vars) or m.group())
start, end = m.span()
done.append(raw[:start]) # Keep stuff leading up to token
@ -231,7 +244,7 @@ def varReplace(raw, vars):
return ''.join(done)
def template(text, vars, setup_cache, no_engine=False):
def template(text, vars, setup_cache, no_engine=True):
''' run a text buffer through the templating engine '''
vars = vars.copy()
text = varReplace(unicode(text), vars)