From f8593cc76b007872d5d590062e26a8c2d1a264c2 Mon Sep 17 00:00:00 2001
From: Jiri Tyr <jiri.tyr@gmail.com>
Date: Thu, 2 Jul 2015 14:37:51 +0100
Subject: [PATCH] Adding comment filter

---
 v1/ansible/runner/filter_plugins/core.py | 80 ++++++++++++++++++++++++
 1 file changed, 80 insertions(+)

diff --git a/v1/ansible/runner/filter_plugins/core.py b/v1/ansible/runner/filter_plugins/core.py
index bdf45509c3a..f81da6f8942 100644
--- a/v1/ansible/runner/filter_plugins/core.py
+++ b/v1/ansible/runner/filter_plugins/core.py
@@ -270,6 +270,83 @@ def get_encrypted_password(password, hashtype='sha512', salt=None):
 def to_uuid(string):
     return str(uuid.uuid5(UUID_NAMESPACE_ANSIBLE, str(string)))
 
+def comment(text, style='plain', **kw):
+    # Predefined comment types
+    comment_styles = {
+        'plain': {
+            'decoration': '# '
+        },
+        'erlang': {
+            'decoration': '% '
+        },
+        'c': {
+            'decoration': '// '
+        },
+        'cblock': {
+            'beginning': '/*',
+            'decoration': ' * ',
+            'end': ' */'
+        },
+        'xml': {
+            'beginning': '<!--',
+            'decoration': ' - ',
+            'end': '-->'
+        }
+    }
+
+    # Pointer to the right comment type
+    style_params = comment_styles[style]
+
+    if 'decoration' in kw:
+        prepostfix = kw['decoration']
+    else:
+        prepostfix = style_params['decoration']
+
+    # Default params
+    p = {
+        'newline': '\n',
+        'beginning': '',
+        'prefix': (prepostfix).rstrip(),
+        'prefix_count': 1,
+        'decoration': '',
+        'postfix': (prepostfix).rstrip(),
+        'postfix_count': 1,
+        'end': ''
+    }
+
+    # Update default params
+    p.update(style_params)
+    p.update(kw)
+
+    # Compose substrings for the final string
+    str_beginning = ''
+    if p['beginning']:
+        str_beginning = "%s%s" % (p['beginning'], p['newline'])
+    str_prefix = str(
+        "%s%s" % (p['prefix'], p['newline'])) * int(p['prefix_count'])
+    str_text = ("%s%s" % (
+        p['decoration'],
+        # Prepend each line of the text with the decorator
+        text.replace(
+            p['newline'], "%s%s" % (p['newline'], p['decoration'])))).replace(
+                # Remove trailing spaces when only decorator is on the line
+                "%s%s" % (p['decoration'], p['newline']),
+                "%s%s" % (p['decoration'].rstrip(), p['newline']))
+    str_postfix = p['newline'].join(
+        [''] + [p['postfix'] for x in range(p['postfix_count'])])
+    str_end = ''
+    if p['end']:
+        str_end = "%s%s" % (p['newline'], p['end'])
+
+    # Return the final string
+    return "%s%s%s%s%s" % (
+        str_beginning,
+        str_prefix,
+        str_text,
+        str_postfix,
+        str_end)
+
+
 class FilterModule(object):
     ''' Ansible core jinja2 filters '''
 
@@ -348,4 +425,7 @@ class FilterModule(object):
             # random stuff
             'random': rand,
             'shuffle': randomize_list,
+
+            # comment-style decoration of string
+            'comment': comment,
         }