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Add example for regex_replace using named groups

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muffl0n 2015-11-26 12:56:30 +01:00
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docsite/rst/playbooks_filters.rst
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@ -520,6 +520,9 @@ To replace text in a string with regex, use the "regex_replace" filter::
# convert "foobar" to "bar" # convert "foobar" to "bar"
{{ 'foobar' | regex_replace('^f.*o(.*)$', '\\1') }} {{ 'foobar' | regex_replace('^f.*o(.*)$', '\\1') }}
# convert "localhost:80" to "localhost, 80" using named groups
{{ 'localhost:80' | regex_replace('^(?P<host>.+):(?P<port>\\d+)$', '\\g<host>, \\g<port>') }}
.. note:: Prior to ansible 2.0, if "regex_replace" filter was used with variables inside YAML arguments (as opposed to simpler 'key=value' arguments), .. note:: Prior to ansible 2.0, if "regex_replace" filter was used with variables inside YAML arguments (as opposed to simpler 'key=value' arguments),
then you needed to escape backreferences (e.g. ``\\1``) with 4 backslashes (``\\\\``) instead of 2 (``\\``). then you needed to escape backreferences (e.g. ``\\1``) with 4 backslashes (``\\\\``) instead of 2 (``\\``).