#!/usr/bin/python # -*- coding: utf-8 -*- # (c) 2012, Stephen Fromm # # 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 os import os.path import tempfile import re DOCUMENTATION = ''' --- module: assemble short_description: Assembles a configuration file from fragments description: - Assembles a configuration file from fragments. Often a particular program will take a single configuration file and does not support a C(conf.d) style structure where it is easy to build up the configuration from multiple sources. M(assemble) will take a directory of files that can be local or have already been transferred to the system, and concatenate them together to produce a destination file. Files are assembled in string sorting order. Puppet calls this idea I(fragments). version_added: "0.5" options: src: description: - An already existing directory full of source files. required: true default: null aliases: [] dest: description: - A file to create using the concatenation of all of the source files. required: true default: null backup: description: - Create a backup file (if C(yes)), including the timestamp information so you can get the original file back if you somehow clobbered it incorrectly. required: false choices: [ "yes", "no" ] default: "no" delimiter: description: - A delimiter to separate the file contents. version_added: "1.4" required: false default: null remote_src: description: - If False, it will search for src at originating/master machine, if True it will go to the remote/target machine for the src. Default is True. choices: [ "True", "False" ] required: false default: "True" version_added: "1.4" regexp: description: - Assemble files only if C(regex) matches the filename. If not set, all files are assembled. All "\\" (backslash) must be escaped as "\\\\" to comply yaml syntax. Uses Python regular expressions; see U(http://docs.python.org/2/library/re.html). required: false default: null ignore_hidden: description: - A boolean that controls if files that start with a '.' will be included or not. required: false default: false version_added: "2.0" validate: description: - The validation command to run before copying into place. The path to the file to validate is passed in via '%s' which must be present as in the sshd example below. The command is passed securely so shell features like expansion and pipes won't work. required: false default: null version_added: "2.0" author: "Stephen Fromm (@sfromm)" extends_documentation_fragment: - files ''' EXAMPLES = ''' # Example from Ansible Playbooks - assemble: src=/etc/someapp/fragments dest=/etc/someapp/someapp.conf # When a delimiter is specified, it will be inserted in between each fragment - assemble: src=/etc/someapp/fragments dest=/etc/someapp/someapp.conf delimiter='### START FRAGMENT ###' # Copy a new "sshd_config" file into place, after passing validation with sshd - assemble: src=/etc/ssh/conf.d/ dest=/etc/ssh/sshd_config validate='/usr/sbin/sshd -t -f %s' ''' # =========================================== # Support method def assemble_from_fragments(src_path, delimiter=None, compiled_regexp=None, ignore_hidden=False): ''' assemble a file from a directory of fragments ''' tmpfd, temp_path = tempfile.mkstemp() tmp = os.fdopen(tmpfd,'w') delimit_me = False add_newline = False for f in sorted(os.listdir(src_path)): if compiled_regexp and not compiled_regexp.search(f): continue fragment = "%s/%s" % (src_path, f) if not os.path.isfile(fragment) or (ignore_hidden and os.path.basename(fragment).startswith('.')): continue fragment_content = file(fragment).read() # always put a newline between fragments if the previous fragment didn't end with a newline. if add_newline: tmp.write('\n') # delimiters should only appear between fragments if delimit_me: if delimiter: # un-escape anything like newlines delimiter = delimiter.decode('unicode-escape') tmp.write(delimiter) # always make sure there's a newline after the # delimiter, so lines don't run together if delimiter[-1] != '\n': tmp.write('\n') tmp.write(fragment_content) delimit_me = True if fragment_content.endswith('\n'): add_newline = False else: add_newline = True tmp.close() return temp_path def cleanup(path, result=None): # cleanup just in case if os.path.exists(path): try: os.remove(path) except (IOError, OSError), e: # don't error on possible race conditions, but keep warning if result is not None: result['warnings'] = ['Unable to remove temp file (%s): %s' % (path, str(e))] # ============================================================== # main def main(): module = AnsibleModule( # not checking because of daisy chain to file module argument_spec = dict( src = dict(required=True), delimiter = dict(required=False), dest = dict(required=True), backup=dict(default=False, type='bool'), remote_src=dict(default=False, type='bool'), regexp = dict(required=False), ignore_hidden = dict(default=False, type='bool'), validate = dict(required=False, type='str'), ), add_file_common_args=True ) changed = False path_hash = None dest_hash = None src = os.path.expanduser(module.params['src']) dest = os.path.expanduser(module.params['dest']) backup = module.params['backup'] delimiter = module.params['delimiter'] regexp = module.params['regexp'] compiled_regexp = None ignore_hidden = module.params['ignore_hidden'] validate = module.params.get('validate', None) result = dict(src=src, dest=dest) if not os.path.exists(src): module.fail_json(msg="Source (%s) does not exist" % src) if not os.path.isdir(src): module.fail_json(msg="Source (%s) is not a directory" % src) if regexp != None: try: compiled_regexp = re.compile(regexp) except re.error, e: module.fail_json(msg="Invalid Regexp (%s) in \"%s\"" % (e, regexp)) if validate and "%s" not in validate: module.fail_json(msg="validate must contain %%s: %s" % validate) path = assemble_from_fragments(src, delimiter, compiled_regexp, ignore_hidden) path_hash = module.sha1(path) result['checksum'] = path_hash # Backwards compat. This won't return data if FIPS mode is active try: pathmd5 = module.md5(path) except ValueError: pathmd5 = None result['md5sum'] = pathmd5 if os.path.exists(dest): dest_hash = module.sha1(dest) if path_hash != dest_hash: if validate: (rc, out, err) = module.run_command(validate % path) result['validation'] = dict(rc=rc, stdout=out, stderr=err) if rc != 0: cleanup(path) result['msg'] = "failed to validate: rc:%s error:%s" % (rc, err) module.fail_json(result) if backup and dest_hash is not None: result['backup_file'] = module.backup_local(dest) module.atomic_move(path, dest) changed = True cleanup(path, result) # handle file permissions file_args = module.load_file_common_arguments(module.params) result['changed'] = module.set_fs_attributes_if_different(file_args, changed) # Mission complete result['msg'] = "OK" module.exit_json(result) # import module snippets from ansible.module_utils.basic import * main()