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Add code to flag legacy templating like $foo.{bar} as deprecated in favor of Jinja2 {{ foo.bar }} so we

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can remove the legacy system at a later date.
This commit is contained in:
Michael DeHaan 2013-04-10 17:52:35 -04:00
commit b09ef21ec9
13 changed files with 102 additions and 61 deletions
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26
lib/ansible/utils/template.py
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@ -29,13 +29,17 @@ import subprocess
import datetime
import pwd
class Flags:
LEGACY_TEMPLATE_WARNING = False
# TODO: refactor this file
FILTER_PLUGINS = {}
_LISTRE = re.compile(r"(\w+)\[(\d+)\]")
JINJA2_OVERRIDE='#jinja2:'
def _varFindLimitSpace(basedir, vars, space, part, lookup_fatal, depth, expand_lists):
def _legacy_varFindLimitSpace(basedir, vars, space, part, lookup_fatal, depth, expand_lists):
''' limits the search space of space to part
basically does space.get(part, None), but with
@ -49,7 +53,7 @@ def _varFindLimitSpace(basedir, vars, space, part, lookup_fatal, depth, expand_l
if part[0] == '{' and part[-1] == '}':
part = part[1:-1]
# Template part to resolve variables within (${var$var2})
part = varReplace(basedir, part, vars, lookup_fatal=lookup_fatal, depth=depth + 1, expand_lists=expand_lists)
part = legacy_varReplace(basedir, part, vars, lookup_fatal=lookup_fatal, depth=depth + 1, expand_lists=expand_lists)
# Now find it
if part in space:
@ -72,7 +76,7 @@ def _varFindLimitSpace(basedir, vars, space, part, lookup_fatal, depth, expand_l
return space
def _varFind(basedir, text, vars, lookup_fatal, depth, expand_lists):
def _legacy_varFind(basedir, text, vars, lookup_fatal, depth, expand_lists):
''' Searches for a variable in text and finds its replacement in vars
The variables can have two formats;
@ -145,7 +149,7 @@ def _varFind(basedir, text, vars, lookup_fatal, depth, expand_lists):
pass
elif is_complex and text[end] == '.':
if brace_level == 1:
space = _varFindLimitSpace(basedir, vars, space, text[part_start:end], lookup_fatal, depth, expand_lists)
space = _legacy_varFindLimitSpace(basedir, vars, space, text[part_start:end], lookup_fatal, depth, expand_lists)
part_start = end + 1
else:
# This breaks out of the loop on non-variable name characters
@ -190,10 +194,10 @@ def _varFind(basedir, text, vars, lookup_fatal, depth, expand_lists):
var_end -= 1
if text[var_end] != '}' or brace_level != 0:
return None
space = _varFindLimitSpace(basedir, vars, space, text[part_start:var_end], lookup_fatal, depth, expand_lists)
space = _legacy_varFindLimitSpace(basedir, vars, space, text[part_start:var_end], lookup_fatal, depth, expand_lists)
return {'replacement': space, 'start': start, 'end': end}
def varReplace(basedir, raw, vars, lookup_fatal=True, depth=0, expand_lists=False):
def legacy_varReplace(basedir, raw, vars, lookup_fatal=True, depth=0, expand_lists=False):
''' Perform variable replacement of $variables in string raw using vars dictionary '''
# this code originally from yum
@ -206,7 +210,7 @@ def varReplace(basedir, raw, vars, lookup_fatal=True, depth=0, expand_lists=Fals
done = [] # Completed chunks to return
while raw:
m = _varFind(basedir, raw, vars, lookup_fatal, depth, expand_lists)
m = _legacy_varFind(basedir, raw, vars, lookup_fatal, depth, expand_lists)
if not m:
done.append(raw)
break
@ -235,16 +239,20 @@ def template(basedir, varname, vars, lookup_fatal=True, depth=0, expand_lists=Tr
if isinstance(varname, basestring):
if '{{' in varname or '{%' in varname:
varname = template_from_string(basedir, varname, vars)
m = _varFind(basedir, varname, vars, lookup_fatal, depth, expand_lists)
m = _legacy_varFind(basedir, varname, vars, lookup_fatal, depth, expand_lists)
if not m:
return varname
if m['start'] == 0 and m['end'] == len(varname):
if m['replacement'] is not None:
Flags.LEGACY_TEMPLATE_WARNING = True
return template(basedir, m['replacement'], vars, lookup_fatal, depth, expand_lists)
else:
return varname
else:
return varReplace(basedir, varname, vars, lookup_fatal, depth, expand_lists)
Flags.LEGACY_TEMPLATE_WARNING = True
return legacy_varReplace(basedir, varname, vars, lookup_fatal, depth, expand_lists)
elif isinstance(varname, (list, tuple)):
return [template(basedir, v, vars, lookup_fatal, depth, expand_lists) for v in varname]
elif isinstance(varname, dict):