Add regex_replace jinja2 filter

lib/ansible/runner/filter_plugins/core.py

@@ -127,6 +127,15 @@ def search(value, pattern='', ignorecase=False):
     ''' Perform a `re.search` returning a boolean '''
     return regex(value, pattern, ignorecase, 'search')
 
+def regex_replace(value='', pattern='', replacement='', ignorecase=False):
+    ''' Perform a `re.sub` returning a string '''
+    if ignorecase:
+        flags = re.I
+    else:
+        flags = 0
+    _re = re.compile(pattern, flags=flags)
+    return _re.sub(replacement, value)
+
 def unique(a):
     return set(a)
 
@@ -195,6 +204,7 @@ class FilterModule(object):
             'match': match,
             'search': search,
             'regex': regex,
+            'regex_replace': regex_replace,
 
             # list
             'unique' : unique,

test/TestFilters.py

@@ -116,6 +116,21 @@ class TestFilters(unittest.TestCase):
                                                       True)
         assert a == True
 
+    def test_regex_replace_case_sensitive(self):
+        a = ansible.runner.filter_plugins.core.regex_replace('ansible', '^a.*i(.*)$',
+                                                      'a\\1')
+        assert a == 'able'
+
+    def test_regex_replace_case_insensitive(self):
+        a = ansible.runner.filter_plugins.core.regex_replace('ansible', '^A.*I(.*)$',
+                                                      'a\\1', True)
+        assert a == 'able'
+
+    def test_regex_replace_no_match(self):
+        a = ansible.runner.filter_plugins.core.regex_replace('ansible', '^b.*i(.*)$',
+                                                      'a\\1')
+        assert a == 'ansible'
+
     #def test_filters(self):
 
         # this test is pretty low level using a playbook, hence I am disabling it for now -- MPD.