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community.general/plugins/modules/files/ini_file.py

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2020-03-09 10:11:07 +01:00
#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright: (c) 2012, Jan-Piet Mens <jpmens () gmail.com>
# Copyright: (c) 2015, Ales Nosek <anosek.nosek () gmail.com>
# Copyright: (c) 2017, Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import absolute_import, division, print_function
__metaclass__ = type
DOCUMENTATION = r'''
---
module: ini_file
short_description: Tweak settings in INI files
extends_documentation_fragment: files
description:
- Manage (add, remove, change) individual settings in an INI-style file without having
to manage the file as a whole with, say, M(ansible.builtin.template) or M(ansible.builtin.assemble).
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- Adds missing sections if they don't exist.
- Before Ansible 2.0, comments are discarded when the source file is read, and therefore will not show up in the destination file.
- Since Ansible 2.3, this module adds missing ending newlines to files to keep in line with the POSIX standard, even when
no other modifications need to be applied.
options:
path:
description:
- Path to the INI-style file; this file is created if required.
- Before Ansible 2.3 this option was only usable as I(dest).
type: path
required: true
aliases: [ dest ]
section:
description:
- Section name in INI file. This is added if C(state=present) automatically when
a single value is being set.
- If left empty or set to C(null), the I(option) will be placed before the first I(section).
- Using C(null) is also required if the config format does not support sections.
type: str
required: true
option:
description:
- If set (required for changing a I(value)), this is the name of the option.
- May be omitted if adding/removing a whole I(section).
type: str
value:
description:
- The string value to be associated with an I(option).
- May be omitted when removing an I(option).
type: str
backup:
description:
- Create a backup file including the timestamp information so you can get
the original file back if you somehow clobbered it incorrectly.
type: bool
default: no
state:
description:
- If set to C(absent) the option or section will be removed if present instead of created.
type: str
choices: [ absent, present ]
default: present
no_extra_spaces:
description:
- Do not insert spaces before and after '=' symbol.
type: bool
default: no
create:
description:
- If set to C(no), the module will fail if the file does not already exist.
- By default it will create the file if it is missing.
type: bool
default: yes
allow_no_value:
description:
- Allow option without value and without '=' symbol.
type: bool
default: no
notes:
- While it is possible to add an I(option) without specifying a I(value), this makes no sense.
- As of Ansible 2.3, the I(dest) option has been changed to I(path) as default, but I(dest) still works as well.
author:
- Jan-Piet Mens (@jpmens)
- Ales Nosek (@noseka1)
'''
EXAMPLES = r'''
# Before Ansible 2.3, option 'dest' was used instead of 'path'
- name: Ensure "fav=lemonade is in section "[drinks]" in specified file
community.general.ini_file:
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path: /etc/conf
section: drinks
option: fav
value: lemonade
mode: '0600'
backup: yes
- name: Ensure "temperature=cold is in section "[drinks]" in specified file
community.general.ini_file:
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path: /etc/anotherconf
section: drinks
option: temperature
value: cold
backup: yes
'''
import io
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import os
import re
import tempfile
import traceback
from ansible.module_utils.basic import AnsibleModule
def match_opt(option, line):
option = re.escape(option)
return re.match('[#;]?( |\t)*%s( |\t)*(=|$)' % option, line)
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def match_active_opt(option, line):
option = re.escape(option)
return re.match('( |\t)*%s( |\t)*(=|$)' % option, line)
def do_ini(module, filename, section=None, option=None, value=None,
state='present', backup=False, no_extra_spaces=False, create=True,
allow_no_value=False):
diff = dict(
before='',
after='',
before_header='%s (content)' % filename,
after_header='%s (content)' % filename,
)
if not os.path.exists(filename):
if not create:
module.fail_json(rc=257, msg='Destination %s does not exist !' % filename)
destpath = os.path.dirname(filename)
if not os.path.exists(destpath) and not module.check_mode:
os.makedirs(destpath)
ini_lines = []
else:
with io.open(filename, 'r', encoding="utf-8-sig") as ini_file:
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ini_lines = ini_file.readlines()
if module._diff:
diff['before'] = ''.join(ini_lines)
changed = False
# ini file could be empty
if not ini_lines:
ini_lines.append('\n')
# last line of file may not contain a trailing newline
if ini_lines[-1] == "" or ini_lines[-1][-1] != '\n':
ini_lines[-1] += '\n'
changed = True
# append fake section lines to simplify the logic
# At top:
# Fake random section to do not match any other in the file
# Using commit hash as fake section name
fake_section_name = "ad01e11446efb704fcdbdb21f2c43757423d91c5"
# Insert it at the beginning
ini_lines.insert(0, '[%s]' % fake_section_name)
# At bottom:
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ini_lines.append('[')
# If no section is defined, fake section is used
if not section:
section = fake_section_name
within_section = not section
section_start = 0
msg = 'OK'
if no_extra_spaces:
assignment_format = '%s=%s\n'
else:
assignment_format = '%s = %s\n'
for index, line in enumerate(ini_lines):
if line.startswith('[%s]' % section):
within_section = True
section_start = index
elif line.startswith('['):
if within_section:
if state == 'present':
# insert missing option line at the end of the section
for i in range(index, 0, -1):
# search backwards for previous non-blank or non-comment line
if not re.match(r'^[ \t]*([#;].*)?$', ini_lines[i - 1]):
if option and value:
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ini_lines.insert(i, assignment_format % (option, value))
msg = 'option added'
changed = True
elif option and not value and allow_no_value:
ini_lines.insert(i, '%s\n' % option)
msg = 'option added'
changed = True
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break
elif state == 'absent' and not option:
# remove the entire section
del ini_lines[section_start:index]
msg = 'section removed'
changed = True
break
else:
if within_section and option:
if state == 'present':
# change the existing option line
if match_opt(option, line):
if not value and allow_no_value:
newline = '%s\n' % option
else:
newline = assignment_format % (option, value)
option_changed = ini_lines[index] != newline
changed = changed or option_changed
if option_changed:
msg = 'option changed'
ini_lines[index] = newline
if option_changed:
# remove all possible option occurrences from the rest of the section
index = index + 1
while index < len(ini_lines):
line = ini_lines[index]
if line.startswith('['):
break
if match_active_opt(option, line):
del ini_lines[index]
else:
index = index + 1
break
elif state == 'absent':
# delete the existing line
if match_active_opt(option, line):
del ini_lines[index]
changed = True
msg = 'option changed'
break
# remove the fake section line
del ini_lines[0]
del ini_lines[-1:]
if not within_section and state == 'present':
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ini_lines.append('[%s]\n' % section)
msg = 'section and option added'
if option and value is not None:
ini_lines.append(assignment_format % (option, value))
elif option and value is None and allow_no_value:
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ini_lines.append('%s\n' % option)
else:
msg = 'only section added'
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changed = True
if module._diff:
diff['after'] = ''.join(ini_lines)
backup_file = None
if changed and not module.check_mode:
if backup:
backup_file = module.backup_local(filename)
try:
tmpfd, tmpfile = tempfile.mkstemp(dir=module.tmpdir)
f = os.fdopen(tmpfd, 'w')
f.writelines(ini_lines)
f.close()
except IOError:
module.fail_json(msg="Unable to create temporary file %s", traceback=traceback.format_exc())
try:
module.atomic_move(tmpfile, filename)
except IOError:
module.ansible.fail_json(msg='Unable to move temporary \
file %s to %s, IOError' % (tmpfile, filename), traceback=traceback.format_exc())
return (changed, backup_file, diff, msg)
def main():
module = AnsibleModule(
argument_spec=dict(
path=dict(type='path', required=True, aliases=['dest']),
section=dict(type='str', required=True),
option=dict(type='str'),
value=dict(type='str'),
backup=dict(type='bool', default=False),
state=dict(type='str', default='present', choices=['absent', 'present']),
no_extra_spaces=dict(type='bool', default=False),
allow_no_value=dict(type='bool', default=False),
create=dict(type='bool', default=True)
),
add_file_common_args=True,
supports_check_mode=True,
)
path = module.params['path']
section = module.params['section']
option = module.params['option']
value = module.params['value']
state = module.params['state']
backup = module.params['backup']
no_extra_spaces = module.params['no_extra_spaces']
allow_no_value = module.params['allow_no_value']
create = module.params['create']
if state == 'present' and not allow_no_value and value is None:
module.fail_json("Parameter 'value' must not be empty if state=present and allow_no_value=False")
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(changed, backup_file, diff, msg) = do_ini(module, path, section, option, value, state, backup, no_extra_spaces, create, allow_no_value)
if not module.check_mode and os.path.exists(path):
file_args = module.load_file_common_arguments(module.params)
changed = module.set_fs_attributes_if_different(file_args, changed)
results = dict(
changed=changed,
diff=diff,
msg=msg,
path=path,
)
if backup_file is not None:
results['backup_file'] = backup_file
# Mission complete
module.exit_json(**results)
if __name__ == '__main__':
main()