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# -*- coding: utf-8 -*- # Copyright: (c) 2012, Stephen Fromm <sfromm@gmail.com> # Copyright: (c) 2016, Toshio Kuratomi <tkuratomi@ansible.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: assemble short_description: Assemble configuration files 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. C(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. type: path required: true dest: description: - A file to create using the concatenation of all of the source files. type: path required: true backup: description: - Create a backup file (if C(true)), including the timestamp information so you can get the original file back if you somehow clobbered it incorrectly. type: bool default: no delimiter: description: - A delimiter to separate the file contents. type: str version_added: '1.4' remote_src: description: - If C(false), it will search for src at originating/master machine. - If C(true), it will go to the remote/target machine for the src. type: bool default: yes version_added: '1.4' regexp: description: - Assemble files only if C(regex) matches the filename. - If not set, all files are assembled. - Every C(\) (backslash) must be escaped as C(\\) to comply to YAML syntax. - Uses L(Python regular expressions,https://docs.python.org/3/library/re.html). type: str ignore_hidden: description: - A boolean that controls if files that start with a '.' will be included or not. type: bool default: no 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. type: str version_added: '2.0' attributes: action: support: full async: support: none bypass_host_loop: support: none check_mode: support: none diff_mode: support: full platform: platforms: posix safe_file_operations: support: full vault: support: full version_added: '2.2' seealso: - module: ansible.builtin.copy - module: ansible.builtin.template - module: ansible.windows.win_copy author: - Stephen Fromm (@sfromm) extends_documentation_fragment: - action_common_attributes - action_common_attributes.flow - action_common_attributes.files - decrypt - files ''' EXAMPLES = r''' - name: Assemble from fragments from a directory ansible.builtin.assemble: src: /etc/someapp/fragments dest: /etc/someapp/someapp.conf - name: Insert the provided delimiter between fragments ansible.builtin.assemble: src: /etc/someapp/fragments dest: /etc/someapp/someapp.conf delimiter: '### START FRAGMENT ###' - name: Assemble a new "sshd_config" file into place, after passing validation with sshd ansible.builtin.assemble: src: /etc/ssh/conf.d/ dest: /etc/ssh/sshd_config validate: /usr/sbin/sshd -t -f %s ''' RETURN = r'''#''' import codecs import os import re import tempfile from ansible.module_utils.basic import AnsibleModule from ansible.module_utils.six import b, indexbytes from ansible.module_utils._text import to_native def assemble_from_fragments(src_path, delimiter=None, compiled_regexp=None, ignore_hidden=False, tmpdir=None): ''' assemble a file from a directory of fragments ''' tmpfd, temp_path = tempfile.mkstemp(dir=tmpdir) tmp = os.fdopen(tmpfd, 'wb') 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 = os.path.join(src_path, f) if not os.path.isfile(fragment) or (ignore_hidden and os.path.basename(fragment).startswith('.')): continue with open(fragment, 'rb') as fragment_fh: fragment_content = fragment_fh.read() # always put a newline between fragments if the previous fragment didn't end with a newline. if add_newline: tmp.write(b('\n')) # delimiters should only appear between fragments if delimit_me: if delimiter: # un-escape anything like newlines delimiter = codecs.escape_decode(delimiter)[0] tmp.write(delimiter) # always make sure there's a newline after the # delimiter, so lines don't run together # byte indexing differs on Python 2 and 3, # use indexbytes for compat # chr(10) == '\n' if indexbytes(delimiter, -1) != 10: tmp.write(b('\n')) tmp.write(fragment_content) delimit_me = True if fragment_content.endswith(b('\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) as 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, to_native(e))] def main(): module = AnsibleModule( # not checking because of daisy chain to file module argument_spec=dict( src=dict(type='path', required=True), delimiter=dict(type='str'), dest=dict(type='path', required=True), backup=dict(type='bool', default=False), remote_src=dict(type='bool', default=True), regexp=dict(type='str'), ignore_hidden=dict(type='bool', default=False), validate=dict(type='str'), ), add_file_common_args=True, ) changed = False path_hash = None dest_hash = None src = module.params['src'] dest = 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 is not None: try: compiled_regexp = re.compile(regexp) except re.error as e: module.fail_json(msg="Invalid Regexp (%s) in \"%s\"" % (to_native(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, module.tmpdir) 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) module.fail_json(msg="failed to validate: rc:%s error:%s" % (rc, err)) if backup and dest_hash is not None: result['backup_file'] = module.backup_local(dest) module.atomic_move(path, dest, unsafe_writes=module.params['unsafe_writes']) 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) if __name__ == '__main__': main()