New module: blockinfile
This commit is contained in:
YAEGASHI Takeshi
parent
15480e3d04
commit
592e300851
1 changed files with 292 additions and 0 deletions
292
files/blockinfile.py
Normal file
292
files/blockinfile.py
Normal file
|
|
@ -0,0 +1,292 @@
|
||||||
|
#!/usr/bin/python
|
||||||
|
# -*- coding: utf-8 -*-
|
||||||
|
|
||||||
|
# (c) 2014, 2015 YAEGASHI Takeshi <yaegashi@debian.org>
|
||||||
|
#
|
||||||
|
# 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/>.
|
||||||
|
|
||||||
|
import re
|
||||||
|
import os
|
||||||
|
import tempfile
|
||||||
|
|
||||||
|
DOCUMENTATION = """
|
||||||
|
---
|
||||||
|
module: blockinfile
|
||||||
|
author:
|
||||||
|
- 'YAEGASHI Takeshi (@yaegashi)'
|
||||||
|
extends_documentation_fragment:
|
||||||
|
- files
|
||||||
|
- validate
|
||||||
|
short_description: Insert/update/remove a text block
|
||||||
|
surrounded by marker lines.
|
||||||
|
version_added: '2.0'
|
||||||
|
description:
|
||||||
|
- This module will insert/update/remove a block of multi-line text
|
||||||
|
surrounded by customizable marker lines.
|
||||||
|
notes:
|
||||||
|
- This module supports check mode.
|
||||||
|
options:
|
||||||
|
dest:
|
||||||
|
aliases: [ name, destfile ]
|
||||||
|
required: true
|
||||||
|
description:
|
||||||
|
- The file to modify.
|
||||||
|
state:
|
||||||
|
required: false
|
||||||
|
choices: [ present, absent ]
|
||||||
|
default: present
|
||||||
|
description:
|
||||||
|
- Whether the block should be there or not.
|
||||||
|
marker:
|
||||||
|
required: false
|
||||||
|
default: '# {mark} ANSIBLE MANAGED BLOCK'
|
||||||
|
description:
|
||||||
|
- The marker line template.
|
||||||
|
"{mark}" will be replaced with "BEGIN" or "END".
|
||||||
|
block:
|
||||||
|
aliases: [ content ]
|
||||||
|
required: false
|
||||||
|
default: ''
|
||||||
|
description:
|
||||||
|
- The text to insert inside the marker lines.
|
||||||
|
If it's missing or an empty string,
|
||||||
|
the block will be removed as if C(state) were specified to C(absent).
|
||||||
|
insertafter:
|
||||||
|
required: false
|
||||||
|
default: EOF
|
||||||
|
description:
|
||||||
|
- If specified, the block will be inserted after the last match of
|
||||||
|
specified regular expression. A special value is available; C(EOF) for
|
||||||
|
inserting the block at the end of the file. If specified regular
|
||||||
|
expresion has no matches, C(EOF) will be used instead.
|
||||||
|
choices: [ 'EOF', '*regex*' ]
|
||||||
|
insertbefore:
|
||||||
|
required: false
|
||||||
|
default: None
|
||||||
|
description:
|
||||||
|
- If specified, the block will be inserted before the last match of
|
||||||
|
specified regular expression. A special value is available; C(BOF) for
|
||||||
|
inserting the block at the beginning of the file. If specified regular
|
||||||
|
expresion has no matches, the block will be inserted at the end of the
|
||||||
|
file.
|
||||||
|
choices: [ 'BOF', '*regex*' ]
|
||||||
|
create:
|
||||||
|
required: false
|
||||||
|
default: 'no'
|
||||||
|
choices: [ 'yes', 'no' ]
|
||||||
|
description:
|
||||||
|
- Create a new file if it doesn't exist.
|
||||||
|
backup:
|
||||||
|
required: false
|
||||||
|
default: 'no'
|
||||||
|
choices: [ 'yes', 'no' ]
|
||||||
|
description:
|
||||||
|
- Create a backup file including the timestamp information so you can
|
||||||
|
get the original file back if you somehow clobbered it incorrectly.
|
||||||
|
"""
|
||||||
|
|
||||||
|
EXAMPLES = r"""
|
||||||
|
- name: insert/update "Match User" configuation block in /etc/ssh/sshd_config
|
||||||
|
blockinfile:
|
||||||
|
dest: /etc/ssh/sshd_config
|
||||||
|
block: |
|
||||||
|
Match User ansible-agent
|
||||||
|
PasswordAuthentication no
|
||||||
|
|
||||||
|
- name: insert/update eth0 configuration stanza in /etc/network/interfaces
|
||||||
|
(it might be better to copy files into /etc/network/interfaces.d/)
|
||||||
|
blockinfile:
|
||||||
|
dest: /etc/network/interfaces
|
||||||
|
block: |
|
||||||
|
iface eth0 inet static
|
||||||
|
address 192.168.0.1
|
||||||
|
netmask 255.255.255.0
|
||||||
|
|
||||||
|
- name: insert/update HTML surrounded by custom markers after <body> line
|
||||||
|
blockinfile:
|
||||||
|
dest: /var/www/html/index.html
|
||||||
|
marker: "<!-- {mark} ANSIBLE MANAGED BLOCK -->"
|
||||||
|
insertafter: "<body>"
|
||||||
|
content: |
|
||||||
|
<h1>Welcome to {{ansible_hostname}}</h1>
|
||||||
|
<p>Last updated on {{ansible_date_time.iso8601}}</p>
|
||||||
|
|
||||||
|
- name: remove HTML as well as surrounding markers
|
||||||
|
blockinfile:
|
||||||
|
dest: /var/www/html/index.html
|
||||||
|
marker: "<!-- {mark} ANSIBLE MANAGED BLOCK -->"
|
||||||
|
content: ""
|
||||||
|
"""
|
||||||
|
|
||||||
|
|
||||||
|
def write_changes(module, contents, dest):
|
||||||
|
|
||||||
|
tmpfd, tmpfile = tempfile.mkstemp()
|
||||||
|
f = os.fdopen(tmpfd, 'wb')
|
||||||
|
f.write(contents)
|
||||||
|
f.close()
|
||||||
|
|
||||||
|
validate = module.params.get('validate', None)
|
||||||
|
valid = not validate
|
||||||
|
if validate:
|
||||||
|
if "%s" not in validate:
|
||||||
|
module.fail_json(msg="validate must contain %%s: %s" % (validate))
|
||||||
|
(rc, out, err) = module.run_command(validate % tmpfile)
|
||||||
|
valid = rc == 0
|
||||||
|
if rc != 0:
|
||||||
|
module.fail_json(msg='failed to validate: '
|
||||||
|
'rc:%s error:%s' % (rc, err))
|
||||||
|
if valid:
|
||||||
|
module.atomic_move(tmpfile, dest)
|
||||||
|
|
||||||
|
|
||||||
|
def check_file_attrs(module, changed, message):
|
||||||
|
|
||||||
|
file_args = module.load_file_common_arguments(module.params)
|
||||||
|
if module.set_file_attributes_if_different(file_args, False):
|
||||||
|
|
||||||
|
if changed:
|
||||||
|
message += " and "
|
||||||
|
changed = True
|
||||||
|
message += "ownership, perms or SE linux context changed"
|
||||||
|
|
||||||
|
return message, changed
|
||||||
|
|
||||||
|
|
||||||
|
def main():
|
||||||
|
module = AnsibleModule(
|
||||||
|
argument_spec=dict(
|
||||||
|
dest=dict(required=True, aliases=['name', 'destfile']),
|
||||||
|
state=dict(default='present', choices=['absent', 'present']),
|
||||||
|
marker=dict(default='# {mark} ANSIBLE MANAGED BLOCK', type='str'),
|
||||||
|
block=dict(default='', type='str', aliases=['content']),
|
||||||
|
insertafter=dict(default=None),
|
||||||
|
insertbefore=dict(default=None),
|
||||||
|
create=dict(default=False, type='bool'),
|
||||||
|
backup=dict(default=False, type='bool'),
|
||||||
|
validate=dict(default=None, type='str'),
|
||||||
|
),
|
||||||
|
mutually_exclusive=[['insertbefore', 'insertafter']],
|
||||||
|
add_file_common_args=True,
|
||||||
|
supports_check_mode=True
|
||||||
|
)
|
||||||
|
|
||||||
|
params = module.params
|
||||||
|
dest = os.path.expanduser(params['dest'])
|
||||||
|
if module.boolean(params.get('follow', None)):
|
||||||
|
dest = os.path.realpath(dest)
|
||||||
|
|
||||||
|
if os.path.isdir(dest):
|
||||||
|
module.fail_json(rc=256,
|
||||||
|
msg='Destination %s is a directory !' % dest)
|
||||||
|
|
||||||
|
if not os.path.exists(dest):
|
||||||
|
if not module.boolean(params['create']):
|
||||||
|
module.fail_json(rc=257,
|
||||||
|
msg='Destination %s does not exist !' % dest)
|
||||||
|
original = None
|
||||||
|
lines = []
|
||||||
|
else:
|
||||||
|
f = open(dest, 'rb')
|
||||||
|
original = f.read()
|
||||||
|
f.close()
|
||||||
|
lines = original.splitlines()
|
||||||
|
|
||||||
|
insertbefore = params['insertbefore']
|
||||||
|
insertafter = params['insertafter']
|
||||||
|
block = params['block']
|
||||||
|
marker = params['marker']
|
||||||
|
present = params['state'] == 'present'
|
||||||
|
|
||||||
|
if insertbefore is None and insertafter is None:
|
||||||
|
insertafter = 'EOF'
|
||||||
|
|
||||||
|
if insertafter not in (None, 'EOF'):
|
||||||
|
insertre = re.compile(insertafter)
|
||||||
|
elif insertbefore not in (None, 'BOF'):
|
||||||
|
insertre = re.compile(insertbefore)
|
||||||
|
else:
|
||||||
|
insertre = None
|
||||||
|
|
||||||
|
marker0 = re.sub(r'{mark}', 'BEGIN', marker)
|
||||||
|
marker1 = re.sub(r'{mark}', 'END', marker)
|
||||||
|
if present and block:
|
||||||
|
# Escape seqeuences like '\n' need to be handled in Ansible 1.x
|
||||||
|
if ANSIBLE_VERSION.startswith('1.'):
|
||||||
|
block = re.sub('', block, '')
|
||||||
|
blocklines = [marker0] + block.splitlines() + [marker1]
|
||||||
|
else:
|
||||||
|
blocklines = []
|
||||||
|
|
||||||
|
n0 = n1 = None
|
||||||
|
for i, line in enumerate(lines):
|
||||||
|
if line.startswith(marker0):
|
||||||
|
n0 = i
|
||||||
|
if line.startswith(marker1):
|
||||||
|
n1 = i
|
||||||
|
|
||||||
|
if None in (n0, n1):
|
||||||
|
n0 = None
|
||||||
|
if insertre is not None:
|
||||||
|
for i, line in enumerate(lines):
|
||||||
|
if insertre.search(line):
|
||||||
|
n0 = i
|
||||||
|
if n0 is None:
|
||||||
|
n0 = len(lines)
|
||||||
|
elif insertafter is not None:
|
||||||
|
n0 += 1
|
||||||
|
elif insertbefore is not None:
|
||||||
|
n0 = 0 # insertbefore=BOF
|
||||||
|
else:
|
||||||
|
n0 = len(lines) # insertafter=EOF
|
||||||
|
elif n0 < n1:
|
||||||
|
lines[n0:n1+1] = []
|
||||||
|
else:
|
||||||
|
lines[n1:n0+1] = []
|
||||||
|
n0 = n1
|
||||||
|
|
||||||
|
lines[n0:n0] = blocklines
|
||||||
|
|
||||||
|
if lines:
|
||||||
|
result = '\n'.join(lines)+'\n'
|
||||||
|
else:
|
||||||
|
result = ''
|
||||||
|
if original == result:
|
||||||
|
msg = ''
|
||||||
|
changed = False
|
||||||
|
elif original is None:
|
||||||
|
msg = 'File created'
|
||||||
|
changed = True
|
||||||
|
elif not blocklines:
|
||||||
|
msg = 'Block removed'
|
||||||
|
changed = True
|
||||||
|
else:
|
||||||
|
msg = 'Block inserted'
|
||||||
|
changed = True
|
||||||
|
|
||||||
|
if changed and not module.check_mode:
|
||||||
|
if module.boolean(params['backup']) and os.path.exists(dest):
|
||||||
|
module.backup_local(dest)
|
||||||
|
write_changes(module, result, dest)
|
||||||
|
|
||||||
|
msg, changed = check_file_attrs(module, changed, msg)
|
||||||
|
module.exit_json(changed=changed, msg=msg)
|
||||||
|
|
||||||
|
# import module snippets
|
||||||
|
from ansible.module_utils.basic import *
|
||||||
|
from ansible.module_utils.splitter import *
|
||||||
|
if __name__ == '__main__':
|
||||||
|
main()
|
||||||
Loading…
Reference in a new issue