# 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

# Usage:
# concatenated_file { "/etc/some.conf":
# 	dir => "/etc/some.conf.d",
# }
# Use Exec["concat_$name"] as Semaphor
define concatenated_file (
	# where the snippets are located
	$dir = '',
	# a file with content to prepend
	$header = '',
	# a file with content to append
	$footer = '',
	$mode = 0644, $owner = root, $group = 0
	)
{

	$dir_real = $dir ? { '' => "${name}.d", default => $dir }

	if defined(File[$dir_real]) {
		debug("${dir_real} already defined")
	} else {
		file {
			$dir_real:
				source => "puppet://$server/modules/common/empty",
				checksum => mtime,
				ignore => '.ignore',
				recurse => true, purge => true, force => true,
				mode => $mode, owner => $owner, group => $group,
				notify => Exec["concat_${name}"];
		}
	}

	file {
		$name:
			ensure => present, checksum => md5,
			mode => $mode, owner => $owner, group => $group;
	}

	# 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} >| ${name}",
		refreshonly => true,
		subscribe => [ File[$dir_real] ],
		before => File[$name],
		alias => [ "concat_${dir_real}"] ,
	}
	#case $header {
		#'': {}
		#default: { Exec["concat_${name}"] { subscribe +> File[$header] } }
	#}

	#case $footer {
		#'': {}
		#default: { Exec["concat_${name}"] { subscribe +> File[$footer] } }
	#}

}


# 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}"],
	}

}