Rack middleware for adding a (git|svn|you-name-it) version response header.
gem install rack-version-header
require "rack/version_header"
use Rack::VersionHeader,
:header_name => 'X-MyService-Version', # default 'X-Version'
:version_file => '.version' # default '.version'
run app
Provided you have the git executable in your path you can add to your config.ru
require "rack/version_header"
gitsha = `git rev-parse --short HEAD`
file = File.dirname(__FILE__) + '/.gitsha'
File.open(file, 'w') { |f| f.write(gitsha) }
use Rack::VersionHeader,
:header_name => 'X-MyService-Git-Revision',
:version_file => f.path
run app
Then your response headers will look somewhat like
HTTP/1.1 200 OK
Connection: Keep-Alive
Content-Type: text/plain
Date: Fri, 09 Apr 2010 11:25:07 GMT
Server: WEBrick/1.3.1 (Ruby/1.8.7/2010-01-10)
X-MyService-Git-Revision: 213addf
Content-Length: 3370
Copyright (c) 2010 Matthias Lüdtke http://better-idea.org
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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