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# common/manifests/defines/concatenated_file.pp -- create a file from snippets
# stored in a directory
#
# Copyright (C) 2007 David Schmitt <david@schmitt.edv-bus.at>
# See LICENSE for the full license granted to you.
# TODO:
# * create the directory in _part too
# This resource collects file snippets from a directory ($dir) and concatenates
# them in lexical order of their names into a new file ($name). This can be
# used to collect information from disparate sources, when the target file
# format doesn't allow includes.
#
# concatenated_file_part can be used to easily configure content for this.
#
# If no $dir is specified, the target name with '.d' appended will be used.
#
# The $dir is purged by puppet and will only contain explicitely configured
# files. This can be overridden by defining the directory before the
# concatenated_file.
#
# Depend on File[$name] to change if and only if its contents change. Notify
# Exec["concat_${name}"] if you want to force an update.
#
# Usage:
# concatenated_file { "/etc/some.conf":
# dir => "/etc/some.conf.d",
# }
define concatenated_file (
# where the snippets are located
$dir = '',
# a file with content to prepend
$header = '',
# a file with content to append
$footer = '',
# default permissions for the target file
$mode = 0644, $owner = root, $group = 0
)
{
include common::moduledir::common::cf
$dir_real = $dir ? { '' => "${name}.d", default => $dir }
$tmp_file_name = regsubst($dir_real, '/', '_', 'G')
$tmp_file = "${common::moduledir::module_dir_path}/${tmp_file_name}"
if defined(File[$dir_real]) {
debug("${dir_real} already defined")
} else {
file {
$dir_real:
source => "puppet:///modules/common/empty",
checksum => mtime,
ignore => '.ignore',
recurse => true, purge => true, force => true,
mode => $mode, owner => $owner, group => $group,
notify => Exec["concat_${name}"];
}
}
file {
$tmp_file:
ensure => present, checksum => md5,
mode => $mode, owner => $owner, group => $group;
# decouple the actual file from the generation process by using a
# temporary file and puppet's source mechanism. This ensures that events
# for notify/subscribe will only be generated when there is an actual
# change.
$name:
ensure => present, checksum => md5,
source => $tmp_file,
mode => $mode, owner => $owner, group => $group,
require => File[$tmp_file];
}
# if there is a header or footer file, add it
$additional_cmd = $header ? {
'' => $footer ? {
'' => '',
default => "| cat - '${footer}' "
},
default => $footer ? {
'' => "| cat '${header}' - ",
default => "| cat '${header}' - '${footer}' "
}
}
# use >| to force clobbering the target file
exec { "concat_${name}":
command => "/usr/bin/find ${dir_real} -maxdepth 1 -type f ! -name '*puppettmp' -print0 | sort -z | xargs -0 cat ${additional_cmd} >| ${tmp_file}",
subscribe => [ File[$dir_real] ],
before => File[$tmp_file],
alias => [ "concat_${dir_real}"],
loglevel => info
}
}
# Add a snippet called $name to the concatenated_file at $dir.
# The file can be referenced as File["cf_part_${name}"]
define concatenated_file_part (
$dir, $content = '', $ensure = present,
$mode = 0644, $owner = root, $group = 0
)
{
file { "${dir}/${name}":
ensure => $ensure, content => $content,
mode => $mode, owner => $owner, group => $group,
alias => "cf_part_${name}",
notify => Exec["concat_${dir}"],
}
}
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