Preserve template-name via escaping

Make use of an improved regex pattern matching to simply escape the
template name when passing into the params to allow the name be
preserved and used as input to other params.

This avoids needing to perform an additional branch test against all
variables being formatted.

Change-Id: I9c0ac8996d520b9acff3d29039c5c3d76f56d899
Depends-On: I8a74f9b4236ca7bcc72dd207fca23c2bf6a7c801

jenkins_jobs/formatter.py

@@ -33,9 +33,7 @@ def deep_format(obj, paramdict, allow_empty=False):
     # limitations on the values in paramdict - the post-format result must
     # still be valid YAML (so substituting-in a string containing quotes, for
     # example, is problematic).
-    if getattr(obj, 'verbatim', False) is True:
-        ret = obj
-    elif hasattr(obj, 'format'):
+    if hasattr(obj, 'format'):
         try:
             ret = CustomFormatter(allow_empty).format(obj, **paramdict)
         except KeyError as exc:
@@ -131,10 +129,3 @@ class CustomFormatter(Formatter):
                 )
                 return ''
             raise
-
-
-class VerbatimString(str):
-    """
-    String which is not expanded by `deep_format`.
-    """
-    verbatim = True

jenkins_jobs/parser.py

@@ -20,11 +20,12 @@ import fnmatch
 import io
 import itertools
 import logging
+import re
 import os
 
 from jenkins_jobs.constants import MAGIC_MANAGE_STRING
 from jenkins_jobs.errors import JenkinsJobsException
-from jenkins_jobs.formatter import deep_format, VerbatimString
+from jenkins_jobs.formatter import deep_format
 import jenkins_jobs.local_yaml as local_yaml
 from jenkins_jobs import utils
 
@@ -346,8 +347,8 @@ class YamlParser(object):
 
         for values in itertools.product(*dimensions):
             params = copy.deepcopy(project)
-            params['template-name'] = VerbatimString(template_name)
             params = self._applyDefaults(params, template)
+            params['template-name'] = re.sub(r'({|})', r'\1\1', template_name)
 
             try:
                 expanded_values = {}