#!/usr/bin/python # -*- coding: utf-8 -*- # (c) 2012, Daniel Hokka Zakrisson # # 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 . import re import os DOCUMENTATION = ''' --- module: lineinfile author: Daniel Hokka Zakrisson short_description: Ensure a particular line is in a file description: - This module will search a file for a line, and ensure that it is present or absent. - This is primarily useful when you want to change a single line in a file only. For other cases, see the M(copy) or M(template) modules. version_added: "0.7" options: dest: required: true aliases: [ name, destfile ] description: - The file to modify regexp: required: true description: - The regular expression to look for in the file. For C(state=present), the pattern to replace. For C(state=absent), the pattern of the line to remove. state: required: false choices: [ present, absent ] default: "present" aliases: [] description: - Whether the line should be there or not. line: required: false description: - Required for C(state=present). The line to insert/replace into the file. Must match the value given to I(regexp). insertafter: required: false default: EOF description: - Used with C(state=present). If specified, the line will be inserted after the specified regular expression. Two special values are available; C(BOF) for inserting the line at the beginning of the file, and C(EOF) for inserting the line at the end of the file. choices: [ BOF, EOF ] default: EOF create: required: false choices: [ yes, no ] default: no description: - Used with C(state=present). If specified, the file will be created if it does not already exist. By default it will fail if the file is missing. backup: required: false default: 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: - code: "lineinfile: dest=/etc/selinux/config regexp=^SELINUX= line=SELINUX=disabled" - code: 'lineinfile: dest=/etc/sudoers state=absent regexp="^%wheel"' ''' def present(module, dest, regexp, line, insertafter, create, backup): if os.path.isdir(dest): module.fail_json(rc=256, msg='Destination %s is a directory !' % dest) elif not os.path.exists(dest): if not create: module.fail_json(rc=257, msg='Destination %s does not exist !' % dest) destpath = os.path.dirname(dest) if not os.path.exists(destpath): os.makedirs(destpath) lines = [] else: f = open(dest, 'rb') lines = f.readlines() f.close() mre = re.compile(regexp) if not mre.search(line): module.fail_json(msg="usage error: line= doesn't match regexp (%s)" % regexp) if insertafter in ('BOF', 'EOF'): iare = None else: iare = re.compile(insertafter) index = [-1, -1] for lineno in range(0, len(lines)): if mre.search(lines[lineno]): index[0] = lineno elif iare is not None and iare.search(lines[lineno]): # + 1 for the next line index[1] = lineno + 1 # Regexp matched a line in the file if index[0] != -1: if lines[index[0]] == line + os.linesep: msg = '' changed = False else: lines[index[0]] = line + os.linesep msg = 'line replaced' changed = True # Add it to the beginning of the file elif insertafter == 'BOF': lines.insert(0, line + os.linesep) msg = 'line added' changed = True # Add it to the end of the file if requested or if insertafter= didn't match elif insertafter == 'EOF' or index[1] == -1: lines.append(line + os.linesep) msg = 'line added' changed = True # insertafter= matched else: lines.insert(index[1], line + os.linesep) msg = 'line added' changed = True if changed: if backup and os.path.exists(dest): module.backup_local(dest) f = open(dest, 'wb') f.writelines(lines) f.close() module.exit_json(changed=changed, msg=msg) def absent(module, dest, regexp, backup): f = open(dest, 'rb') lines = f.readlines() f.close() cre = re.compile(regexp) found = [] def matcher(line): if cre.search(line): found.append(line) return False else: return True lines = filter(matcher, lines) changed = len(found) > 0 if changed: if backup: module.backup_local(dest) f = open(dest, 'wb') f.writelines(lines) f.close() module.exit_json(changed=changed, found=len(found)) def main(): module = AnsibleModule( argument_spec = dict( dest=dict(required=True, aliases=['name', 'destfile']), state=dict(default='present', choices=['absent', 'present']), regexp=dict(required=True), line=dict(aliases=['value']), insertafter=dict(default='EOF'), create=dict(default=False, choices=BOOLEANS), backup=dict(default=False, choices=BOOLEANS), ), ) params = module.params create = module.boolean(module.params.get('create', False)) backup = module.boolean(module.params.get('backup', False)) if params['state'] == 'present': if 'line' not in params: module.fail_json(msg='line= is required with state=present') present(module, params['dest'], params['regexp'], params['line'], params['insertafter'], create, backup) else: absent(module, params['dest'], params['regexp'], backup) # this is magic, see lib/ansible/module_common.py #<> main()