Add a fake contactstore CGI.

This is useful for testing Gerrit's contactstore features if you
don't have a real contact store server set up already.

* modules/gerrit/files/fakestore.cgi: An extremely trivial shell
script which returns the content Gerrit expects from a successful
submission to a contactstore server. Note this does not check the
application security key or store any of the post variables--it is
simply a black hole for contact updates.

* modules/gerrit/manifests/init.pp: If the contactstore feature is
enabled in Gerrit, install the fakestore.cgi script so it can be
available for testing.

* modules/gerrit/templates/gerrit.vhost.erb: If the contactstore
feature is enabled, ScriptAlias the /fakestore URL to the
fakestore.cgi script.

Change-Id: Ifa0f80bab9e8b8e207f0ffd83f01c8a3d904618e
Reviewed-on: https://review.openstack.org/19939
Reviewed-by: James E. Blair <corvus@inaugust.com>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Approved: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Tested-by: Jenkins

files/fakestore.cgi

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+echo 'Content-Type: text/html
+
+OK'

manifests/init.pp

@@ -519,5 +519,13 @@ class gerrit(
       replace => true,
       require => File['/home/gerrit2/review_site/etc'],
     }
+    file { '/home/gerrit2/review_site/lib/fakestore.cgi':
+      ensure  => present,
+      owner   => 'root',
+      group   => 'root',
+      mode    => '0555',
+      source  => 'puppet:///modules/gerrit/fakestore.cgi',
+      require => File['/home/gerrit2/review_site/lib'],
+    }
   }
 }

templates/gerrit.vhost.erb

@@ -62,6 +62,10 @@
   ScriptAlias /p/ /usr/lib/git-core/git-http-backend/
 <% end -%>
 
+<% if scope.lookupvar("gerrit::contactstore") == true -%>
+  ScriptAlias /fakestore /home/gerrit2/review_site/lib/fakestore.cgi
+<% end -%>
+
   <Directory /home/gerrit2/review_site/git/>
     Order allow,deny
     Allow from all