New module: blockinfile
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YAEGASHI Takeshi
Matt Clay
parent
92efb6eb51
commit
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1 changed files with 292 additions and 0 deletions
292
lib/ansible/modules/extras/files/blockinfile.py
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292
lib/ansible/modules/extras/files/blockinfile.py
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2014, 2015 YAEGASHI Takeshi <yaegashi@debian.org>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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import re
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import os
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import tempfile
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DOCUMENTATION = """
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---
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module: blockinfile
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author:
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- 'YAEGASHI Takeshi (@yaegashi)'
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extends_documentation_fragment:
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- files
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- validate
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short_description: Insert/update/remove a text block
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surrounded by marker lines.
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version_added: '2.0'
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description:
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- This module will insert/update/remove a block of multi-line text
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surrounded by customizable marker lines.
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notes:
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- This module supports check mode.
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options:
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dest:
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aliases: [ name, destfile ]
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required: true
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description:
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- The file to modify.
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state:
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required: false
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choices: [ present, absent ]
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default: present
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description:
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- Whether the block should be there or not.
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marker:
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required: false
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default: '# {mark} ANSIBLE MANAGED BLOCK'
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description:
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- The marker line template.
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"{mark}" will be replaced with "BEGIN" or "END".
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block:
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aliases: [ content ]
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required: false
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default: ''
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description:
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- The text to insert inside the marker lines.
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If it's missing or an empty string,
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the block will be removed as if C(state) were specified to C(absent).
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insertafter:
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required: false
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default: EOF
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description:
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- If specified, the block will be inserted after the last match of
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specified regular expression. A special value is available; C(EOF) for
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inserting the block at the end of the file. If specified regular
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expresion has no matches, C(EOF) will be used instead.
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choices: [ 'EOF', '*regex*' ]
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insertbefore:
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required: false
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default: None
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description:
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- If specified, the block will be inserted before the last match of
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specified regular expression. A special value is available; C(BOF) for
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inserting the block at the beginning of the file. If specified regular
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expresion has no matches, the block will be inserted at the end of the
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file.
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choices: [ 'BOF', '*regex*' ]
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create:
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required: false
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default: 'no'
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choices: [ 'yes', 'no' ]
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description:
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- Create a new file if it doesn't exist.
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backup:
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required: false
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default: 'no'
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choices: [ 'yes', 'no' ]
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description:
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- Create a backup file including the timestamp information so you can
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get the original file back if you somehow clobbered it incorrectly.
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"""
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EXAMPLES = r"""
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- name: insert/update "Match User" configuation block in /etc/ssh/sshd_config
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blockinfile:
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dest: /etc/ssh/sshd_config
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block: |
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Match User ansible-agent
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PasswordAuthentication no
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- name: insert/update eth0 configuration stanza in /etc/network/interfaces
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(it might be better to copy files into /etc/network/interfaces.d/)
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blockinfile:
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dest: /etc/network/interfaces
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block: |
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iface eth0 inet static
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address 192.168.0.1
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netmask 255.255.255.0
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- name: insert/update HTML surrounded by custom markers after <body> line
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blockinfile:
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dest: /var/www/html/index.html
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marker: "<!-- {mark} ANSIBLE MANAGED BLOCK -->"
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insertafter: "<body>"
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content: |
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<h1>Welcome to {{ansible_hostname}}</h1>
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<p>Last updated on {{ansible_date_time.iso8601}}</p>
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- name: remove HTML as well as surrounding markers
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blockinfile:
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dest: /var/www/html/index.html
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marker: "<!-- {mark} ANSIBLE MANAGED BLOCK -->"
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content: ""
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"""
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def write_changes(module, contents, dest):
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tmpfd, tmpfile = tempfile.mkstemp()
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f = os.fdopen(tmpfd, 'wb')
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f.write(contents)
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f.close()
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validate = module.params.get('validate', None)
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valid = not validate
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if validate:
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if "%s" not in validate:
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module.fail_json(msg="validate must contain %%s: %s" % (validate))
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(rc, out, err) = module.run_command(validate % tmpfile)
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valid = rc == 0
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if rc != 0:
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module.fail_json(msg='failed to validate: '
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'rc:%s error:%s' % (rc, err))
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if valid:
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module.atomic_move(tmpfile, dest)
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def check_file_attrs(module, changed, message):
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file_args = module.load_file_common_arguments(module.params)
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if module.set_file_attributes_if_different(file_args, False):
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if changed:
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message += " and "
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changed = True
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message += "ownership, perms or SE linux context changed"
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return message, changed
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def main():
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module = AnsibleModule(
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argument_spec=dict(
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dest=dict(required=True, aliases=['name', 'destfile']),
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state=dict(default='present', choices=['absent', 'present']),
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marker=dict(default='# {mark} ANSIBLE MANAGED BLOCK', type='str'),
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block=dict(default='', type='str', aliases=['content']),
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insertafter=dict(default=None),
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insertbefore=dict(default=None),
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create=dict(default=False, type='bool'),
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backup=dict(default=False, type='bool'),
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validate=dict(default=None, type='str'),
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),
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mutually_exclusive=[['insertbefore', 'insertafter']],
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add_file_common_args=True,
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supports_check_mode=True
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)
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params = module.params
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dest = os.path.expanduser(params['dest'])
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if module.boolean(params.get('follow', None)):
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dest = os.path.realpath(dest)
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if os.path.isdir(dest):
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module.fail_json(rc=256,
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msg='Destination %s is a directory !' % dest)
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if not os.path.exists(dest):
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if not module.boolean(params['create']):
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module.fail_json(rc=257,
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msg='Destination %s does not exist !' % dest)
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original = None
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lines = []
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else:
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f = open(dest, 'rb')
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original = f.read()
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f.close()
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lines = original.splitlines()
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insertbefore = params['insertbefore']
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insertafter = params['insertafter']
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block = params['block']
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marker = params['marker']
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present = params['state'] == 'present'
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if insertbefore is None and insertafter is None:
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insertafter = 'EOF'
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if insertafter not in (None, 'EOF'):
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insertre = re.compile(insertafter)
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elif insertbefore not in (None, 'BOF'):
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insertre = re.compile(insertbefore)
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else:
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insertre = None
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marker0 = re.sub(r'{mark}', 'BEGIN', marker)
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marker1 = re.sub(r'{mark}', 'END', marker)
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if present and block:
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# Escape seqeuences like '\n' need to be handled in Ansible 1.x
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if ANSIBLE_VERSION.startswith('1.'):
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block = re.sub('', block, '')
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blocklines = [marker0] + block.splitlines() + [marker1]
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else:
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blocklines = []
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n0 = n1 = None
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for i, line in enumerate(lines):
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if line.startswith(marker0):
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n0 = i
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if line.startswith(marker1):
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n1 = i
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if None in (n0, n1):
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n0 = None
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if insertre is not None:
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for i, line in enumerate(lines):
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if insertre.search(line):
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n0 = i
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if n0 is None:
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n0 = len(lines)
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elif insertafter is not None:
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n0 += 1
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elif insertbefore is not None:
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n0 = 0 # insertbefore=BOF
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else:
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n0 = len(lines) # insertafter=EOF
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elif n0 < n1:
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lines[n0:n1+1] = []
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else:
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lines[n1:n0+1] = []
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n0 = n1
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lines[n0:n0] = blocklines
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if lines:
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result = '\n'.join(lines)+'\n'
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else:
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result = ''
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if original == result:
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msg = ''
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changed = False
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elif original is None:
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msg = 'File created'
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changed = True
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elif not blocklines:
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msg = 'Block removed'
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changed = True
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else:
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msg = 'Block inserted'
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changed = True
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if changed and not module.check_mode:
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if module.boolean(params['backup']) and os.path.exists(dest):
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module.backup_local(dest)
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write_changes(module, result, dest)
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msg, changed = check_file_attrs(module, changed, msg)
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module.exit_json(changed=changed, msg=msg)
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# import module snippets
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from ansible.module_utils.basic import *
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from ansible.module_utils.splitter import *
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if __name__ == '__main__':
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main()
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