puppet: Factor out nagios plugins installation.

puppet/zulip/manifests/app_frontend_base.pp

@@ -240,15 +240,7 @@ class zulip::app_frontend_base {
     content => template('zulip/logrotate/zulip.template.erb'),
   }
 
-  file { "${zulip::common::nagios_plugins_dir}/zulip_app_frontend":
-    require => Package[$zulip::common::nagios_plugins],
-    recurse => true,
-    purge   => true,
-    owner   => 'root',
-    group   => 'root',
-    mode    => '0755',
-    source  => 'puppet:///modules/zulip/nagios_plugins/zulip_app_frontend',
-  }
+  zulip::nagios_plugins {'zulip_app_frontend': }
 
   # This cron job does nothing unless RATE_LIMIT_TOR_TOGETHER is enabled.
   zulip::cron { 'fetch-tor-exit-nodes':

puppet/zulip/manifests/nagios_plugins.pp

@@ -0,0 +1,14 @@
+# @summary Installs a subdirectory from puppet/zulip/files/nagios_plugins/
+define zulip::nagios_plugins () {
+  include zulip::common
+
+  file { "${zulip::common::nagios_plugins_dir}/${name}":
+    require => Package[$zulip::common::nagios_plugins],
+    recurse => true,
+    purge   => true,
+    owner   => 'root',
+    group   => 'root',
+    mode    => '0755',
+    source  => "puppet:///modules/zulip/nagios_plugins/${name}",
+  }
+}

puppet/zulip/manifests/postgresql_base.pp

@@ -62,15 +62,7 @@ class zulip::postgresql_base {
     mode    => '0644',
     source  => 'puppet:///modules/zulip/postgresql/zulip_english.stop',
   }
-  file { "${zulip::common::nagios_plugins_dir}/zulip_postgresql":
-    require => Package[$zulip::common::nagios_plugins],
-    recurse => true,
-    purge   => true,
-    owner   => 'root',
-    group   => 'root',
-    mode    => '0755',
-    source  => 'puppet:///modules/zulip/nagios_plugins/zulip_postgresql',
-  }
+  zulip::nagios_plugins { 'zulip_postgresql': }
 
   $pgroonga = zulipconf('machine', 'pgroonga', false)
   if $pgroonga {

puppet/zulip/manifests/profile/base.pp

@@ -136,13 +136,5 @@ class zulip::profile::base {
     mode   => '0750',
   }
 
-  file { "${zulip::common::nagios_plugins_dir}/zulip_base":
-    require => Package[$zulip::common::nagios_plugins],
-    recurse => true,
-    purge   => true,
-    owner   => 'root',
-    group   => 'root',
-    mode    => '0755',
-    source  => 'puppet:///modules/zulip/nagios_plugins/zulip_base',
-  }
+  zulip::nagios_plugins { 'zulip_base': }
 }