Update Puppet module for Puppet Server 5.1.0

This patch updates the Puppet module used to install the Clojure file server
to make use of the new JAR directory added to Puppet Server 5.1.0. Installation
is now much cleaner and doesn't require hacking the classpath used by the
init scripts.

Ref: https://tickets.puppetlabs.com/browse/SERVER-249

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+### Fixed
+
+  - Puppet module is now compatible with PE 2017.3.0 and uses the
+    extension JAR directory added to Puppet Server 5.1.0 in SERVER-249.
+
 
 ## [0.2.0] - 2017-09-24
 ### Added

manifests/init.pp

@@ -30,21 +30,35 @@
     notify  => Exec['pe-puppetserver service full restart'],
   }
 
-  file {'/opt/puppetlabs/server/apps/puppetserver/clj-file-server.jar':
-    ensure => file,
-    owner  => 'root',
-    group  => 'root',
-    mode   => '0644',
-    source => 'puppet:///modules/clj_file_server/clj-file-server.jar',
-    notify  => Exec['pe-puppetserver service full restart'],
-  }
+  if versioncmp($::facts['pe_server_version'], '2017.3.0') >= 0 {
+    # Use the new JAR directory added to Puppet Server 5.1.0 that
+    # is on the classpath by default (SERVER-249).
+    file {'/opt/puppetlabs/server/data/puppetserver/jars/clj-file-server.jar':
+      ensure => file,
+      owner  => 'root',
+      group  => 'root',
+      mode   => '0644',
+      source => 'puppet:///modules/clj_file_server/clj-file-server.jar',
+      notify  => Exec['pe-puppetserver service full restart'],
+    }
+  } else {
+    # For older versions, patch the JAR into the classpath.
+    file {'/opt/puppetlabs/server/apps/puppetserver/clj-file-server.jar':
+      ensure => file,
+      owner  => 'root',
+      group  => 'root',
+      mode   => '0644',
+      source => 'puppet:///modules/clj_file_server/clj-file-server.jar',
+      notify  => Exec['pe-puppetserver service full restart'],
+    }
 
-  file_line {'add file server JAR to classpath':
-    ensure => present,
-    path  => '/opt/puppetlabs/server/apps/puppetserver/cli/apps/start',
-    match => '^\s*-cp',
-    line  => '  -cp ${INSTALL_DIR}/puppet-server-release.jar:${INSTALL_DIR}/clj-file-server.jar \\',
-    replace => true,
-    notify  => Exec['pe-puppetserver service full restart'],
+    file_line {'add file server JAR to classpath':
+      ensure => present,
+      path  => '/opt/puppetlabs/server/apps/puppetserver/cli/apps/start',
+      match => '^\s*-cp',
+      line  => '  -cp ${INSTALL_DIR}/puppet-server-release.jar:${INSTALL_DIR}/clj-file-server.jar \\',
+      replace => true,
+      notify  => Exec['pe-puppetserver service full restart'],
+    }
   }
 }