Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression

/
/

Test String

Substitution

Processing...

Code Generator

Generated Code

use strict; my $str = '#!/usr/bin/python # -*- coding: utf-8 -*- # (c) 2014, Ramon de la Fuente <ramon@delafuente.nl> # # This file is part of Ansible # # Ansible is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # Ansible is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with Ansible. If not, see <http://www.gnu.org/licenses/>. DOCUMENTATION = """ module: slack short_description: Send Slack notifications description: - The M(slack) module sends notifications to U(http://slack.com) via the Incoming WebHook integration version_added: 1.6 author: Ramon de la Fuente <ramon@delafuente.nl> options: domain: description: - Slack (sub)domain for your environment without protocol. (i.e. C(future500.slack.com)) required: true token: description: - Slack integration token required: true msg: description: - Message to send. required: true channel: description: - Channel to send the message to. If absent, the message goes to the channel selected for the I(token). required: false username: description: - This is the sender of the message. required: false default: ansible icon_url: description: - Url for the message sender\'s icon (default C(http://www.ansible.com/favicon.ico)) required: false icon_emoji: description: - Emoji for the message sender. See Slack documentation for options. (if I(icon_emoji) is set, I(icon_url) will not be used) required: false link_names: description: - Automatically create links for channels and usernames in I(msg). required: false default: 1 choices: - 1 - 0 parse: description: - Setting for the message parser at Slack required: false choices: - \'full\' - \'none\' validate_certs: description: - If C(no), SSL certificates will not be validated. This should only be used on personally controlled sites using self-signed certificates. required: false default: \'yes\' choices: - \'yes\' - \'no\' """ EXAMPLES = """ - name: Send notification message via Slack local_action: module: slack domain: future500.slack.com token: thetokengeneratedbyslack msg: "{{ inventory_hostname }} completed" - name: Send notification message via Slack all options local_action: module: slack domain: future500.slack.com token: thetokengeneratedbyslack msg: "{{ inventory_hostname }} completed" channel: "#ansible" username: "Ansible on {{ inventory_hostname }}" icon_url: "http://www.example.com/some-image-file.png" link_names: 0 parse: \'none\' """ SLACK_INCOMING_WEBHOOK = \'https://%s/services/hooks/incoming-webhook?token=%s\' def build_payload_for_slack(module, text, channel, username, icon_url, icon_emoji, link_names, parse): payload = dict(text=text) if channel is not None: payload[\'channel\'] = channel if (channel[0] == \'#\') else \'#\'+channel if username is not None: payload[\'username\'] = username if icon_emoji is not None: payload[\'icon_emoji\'] = icon_emoji else: payload[\'icon_url\'] = icon_url if link_names is not None: payload[\'link_names\'] = link_names if parse is not None: payload[\'parse\'] = parse payload="payload=" + module.jsonify(payload) return payload def do_notify_slack(module, domain, token, payload): slack_incoming_webhook = SLACK_INCOMING_WEBHOOK % (domain, token) response, info = fetch_url(module, slack_incoming_webhook, data=payload) if info[\'status\'] != 200: obscured_incoming_webhook = SLACK_INCOMING_WEBHOOK % (domain, \'[obscured]\') module.fail_json(msg=" failed to send %s to %s: %s" % (payload, obscured_incoming_webhook, info[\'msg\'])) def main(): module = AnsibleModule( argument_spec = dict( domain = dict(type=\'str\', required=True), token = dict(type=\'str\', required=True), msg = dict(type=\'str\', required=True), channel = dict(type=\'str\', default=None), username = dict(type=\'str\', default=\'Ansible\'), icon_url = dict(type=\'str\', default=\'http://www.ansible.com/favicon.ico\'), icon_emoji = dict(type=\'str\', default=None), link_names = dict(type=\'int\', default=1, choices=[0,1]), parse = dict(type=\'str\', default=None, choices=[\'none\', \'full\']), validate_certs = dict(default=\'yes\', type=\'bool\'), ) ) domain = module.params[\'domain\'] token = module.params[\'token\'] text = module.params[\'msg\'] channel = module.params[\'channel\'] username = module.params[\'username\'] icon_url = module.params[\'icon_url\'] icon_emoji = module.params[\'icon_emoji\'] link_names = module.params[\'link_names\'] parse = module.params[\'parse\'] payload = build_payload_for_slack(module, text, channel, username, icon_url, icon_emoji, link_names, parse) do_notify_slack(module, domain, token, payload) module.exit_json(msg="OK") # import module snippets from ansible.module_utils.basic import * from ansible.module_utils.urls import * main()'; my $regex = qr/(.*\n)+DOCUMENTATION.*(\"\"\"|''')\n-*\n?((.*\n)+?)(\2)(?s:.*) /p; my $subst = '---\\n\\3'; my $result = $str =~ s/$regex/$subst/r; print "The result of the substitution is' $result\n";

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html