From fcb2b08309e7ad18ee58283d754cb41b54fd79d1 Mon Sep 17 00:00:00 2001
From: Jerome Charaoui <jcharaoui@cmaisonneuve.qc.ca>
Date: Wed, 7 Apr 2010 14:25:08 -0400
Subject: concatenated_file: update define to latest from David Schmitt's
 common module

---
 manifests/defines/concatenated_file.pp | 51 +++++++++++++++++++++++++++-------
 1 file changed, 41 insertions(+), 10 deletions(-)

(limited to 'manifests')

diff --git a/manifests/defines/concatenated_file.pp b/manifests/defines/concatenated_file.pp
index b6f8fb8..d605219 100644
--- a/manifests/defines/concatenated_file.pp
+++ b/manifests/defines/concatenated_file.pp
@@ -4,14 +4,31 @@
 # Copyright (C) 2007 David Schmitt <david@schmitt.edv-bus.at>
 # See LICENSE for the full license granted to you.
 
+module_dir { "common/cf": }
+
 # 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_${name}"] if you want to force an update.
+# 
 # Usage:
-# concatenated_file { "/etc/some.conf":
-# 	dir => "/etc/some.conf.d",
-# }
-# Use Exec["concat_$name"] as Semaphor
+#  concatenated_file { "/etc/some.conf":
+#  	dir => "/etc/some.conf.d",
+#  }
 define concatenated_file (
 	# where the snippets are located
 	$dir = '',
@@ -19,18 +36,22 @@ define concatenated_file (
 	$header = '',
 	# a file with content to append
 	$footer = '',
+	# default permissions for the target file
 	$mode = 0644, $owner = root, $group = 0
 	)
 {
 
 	$dir_real = $dir ? { '' => "${name}.d", default => $dir }
 
+	$tmp_file_name = regsubst($dir_real, '/', '_', 'G')
+	$tmp_file = "${module_dir_path}/${tmp_file_name}"
+
 	if defined(File[$dir_real]) {
 		debug("${dir_real} already defined")
 	} else {
 		file {
 			$dir_real:
-				source => "puppet://$server/modules/common/empty",
+				source => "puppet:///modules/common/empty",
 				checksum => mtime,
 				ignore => '.ignore',
 				recurse => true, purge => true, force => true,
@@ -40,9 +61,18 @@ define concatenated_file (
 	}
 
 	file {
-		$name:
+		$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
@@ -59,11 +89,11 @@ define concatenated_file (
 
 	# 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,
+		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[$name],
-		alias => [ "concat_${dir_real}"] ,
+		before => File[$tmp_file],
+		alias => [ "concat_${dir_real}"],
+		loglevel => info
 	}
 	#case $header {
 		#'': {}
@@ -94,3 +124,4 @@ define concatenated_file_part (
 	}
 
 }
+
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