Merge pull request #10465 from feanil/feanil/fix_templates_for_ints_bools

Don't convert numbers and booleans to strings.

CHANGELOG.md

@@ -4,7 +4,10 @@ Ansible Changes By Release
 ## 2.0 "TBD" - ACTIVE DEVELOPMENT
 
 Major Changes:
-    big_ip modules now support turning off ssl certificate validation (use only for self signed)
+    - big_ip modules now support turning off ssl certificate validation (use only for self signed)
+
+    - template code now retains types for bools and Numbers instead of turning them into strings
+      - If you need the old behaviour, quote the value and it will get passed around as a string
 
 New Modules:
     cloudtrail

lib/ansible/utils/template.py

@@ -31,6 +31,7 @@ import datetime
 import pwd
 import ast
 import traceback
+from numbers import Number
 
 from ansible.utils.string_functions import count_newlines_from_end
 from ansible.utils import to_bytes, to_unicode
@@ -81,6 +82,11 @@ class Flags:
 
 FILTER_PLUGINS = None
 _LISTRE = re.compile(r"(\w+)\[(\d+)\]")
+
+# A regex for checking to see if a variable we're trying to
+# expand is just a single variable name.
+SINGLE_VAR = re.compile(r"^{{\s*(\w*)\s*}}$")
+
 JINJA2_OVERRIDE = '#jinja2:'
 JINJA2_ALLOWED_OVERRIDES = ['trim_blocks', 'lstrip_blocks', 'newline_sequence', 'keep_trailing_newline']
 
@@ -109,7 +115,6 @@ def lookup(name, *args, **kwargs):
 def template(basedir, varname, templatevars, lookup_fatal=True, depth=0, expand_lists=True, convert_bare=False, fail_on_undefined=False, filter_fatal=True):
     ''' templates a data structure by traversing it and substituting for other data structures '''
     from ansible import utils
-
     try:
         if convert_bare and isinstance(varname, basestring):
             first_part = varname.split(".")[0].split("[")[0]
@@ -123,10 +128,13 @@ def template(basedir, varname, templatevars, lookup_fatal=True, depth=0, expand_
                 except errors.AnsibleError, e:
                     raise errors.AnsibleError("Failed to template %s: %s" % (varname, str(e)))
 
-                if (varname.startswith("{") and not varname.startswith("{{")) or varname.startswith("["):
-                    eval_results = utils.safe_eval(varname, locals=templatevars, include_exceptions=True)
-                    if eval_results[1] is None:
-                        varname = eval_results[0]
+                # template_from_string may return non strings for the case where the var is just
+                # a reference to a single variable, so we should re_check before we do further evals
+                if isinstance(varname, basestring):
+                    if (varname.startswith("{") and not varname.startswith("{{")) or varname.startswith("["):
+                        eval_results = utils.safe_eval(varname, locals=templatevars, include_exceptions=True)
+                        if eval_results[1] is None:
+                            varname = eval_results[0]
 
             return varname
 
@@ -323,10 +331,20 @@ def template_from_file(basedir, path, vars, vault_password=None):
 
 def template_from_string(basedir, data, vars, fail_on_undefined=False):
     ''' run a string through the (Jinja2) templating engine '''
-
     try:
         if type(data) == str:
             data = unicode(data, 'utf-8')
+   
+            # Check to see if the string we are trying to render is just referencing a single
+            # var.  In this case we don't wont to accidentally change the type of the variable
+            # to a string by using the jinja template renderer. We just want to pass it. 
+            only_one = SINGLE_VAR.match(data)
+            if only_one:
+                var_name = only_one.group(1)
+                if var_name in vars:
+                    resolved_val = vars[var_name]
+                    if isinstance(resolved_val, (bool, Number)):
+                        return resolved_val
 
         def my_finalize(thing):
             return thing if thing is not None else ''

test/integration/roles/test_template/files/foo.txt

@@ -1 +1,8 @@
 templated_var_loaded
+
+{
+    "bool": true, 
+    "multi_part": "1Foo", 
+    "number": 5, 
+    "string_num": "5"
+}

test/integration/roles/test_template/templates/foo.j2

@@ -1 +1,3 @@
 {{ templated_var }}
+
+{{ templated_dict | to_nice_json }}

test/integration/roles/test_template/vars/main.yml

@@ -1 +1,14 @@
 templated_var: templated_var_loaded
+
+number_var: 5
+string_num: "5"
+bool_var: true
+part_1: 1
+part_2: "Foo"
+
+templated_dict:
+  number: "{{ number_var }}"
+  string_num: "{{ string_num }}"
+  bool: "{{ bool_var }}"
+  multi_part: "{{ part_1 }}{{ part_2 }}"
+

v2/ansible/template/__init__.py

@@ -32,8 +32,17 @@ from ansible.template.template import AnsibleJ2Template
 from ansible.template.vars import AnsibleJ2Vars
 from ansible.utils.debug import debug
 
+from numbers import Number
+
 __all__ = ['Templar']
 
+# A regex for checking to see if a variable we're trying to
+# expand is just a single variable name.
+SINGLE_VAR = re.compile(r"^{{\s*(\w*)\s*}}$")
+
+# Primitive Types which we don't want Jinja to convert to strings.
+NON_TEMPLATED_TYPES = ( bool, Number )
+
 JINJA2_OVERRIDE = '#jinja2:'
 JINJA2_ALLOWED_OVERRIDES = ['trim_blocks', 'lstrip_blocks', 'newline_sequence', 'keep_trailing_newline']
 
@@ -125,6 +134,18 @@ class Templar:
             if isinstance(variable, basestring):
                 result = variable
                 if self._contains_vars(variable):
+
+                    # Check to see if the string we are trying to render is just referencing a single
+                    # var.  In this case we don't wont to accidentally change the type of the variable
+                    # to a string by using the jinja template renderer. We just want to pass it.
+                    only_one = SINGLE_VAR.match(variable)
+                    if only_one:
+                        var_name = only_one.group(1)
+                        if var_name in self._available_vars:
+                            resolved_val = self._available_vars[var_name]
+                            if isinstance(resolved_val, NON_TEMPLATED_TYPES):
+                                return resolved_val
+
                     result = self._do_template(variable, preserve_trailing_newlines=preserve_trailing_newlines)
 
                     # if this looks like a dictionary or list, convert it to such using the safe_eval method