diff --git a/.gitignore b/.gitignore
index 1377554e..b782f12f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 *.swp
+Gemfile.lock
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 00000000..89f2e1b2
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,14 @@
+source 'https://rubygems.org'
+
+group :development, :test do
+  gem 'puppetlabs_spec_helper', :require => false
+  gem 'puppet-lint', '~> 0.3.2'
+end
+
+if puppetversion = ENV['PUPPET_GEM_VERSION']
+  gem 'puppet', puppetversion, :require => false
+else
+  gem 'puppet', :require => false
+end
+
+# vim:ft=ruby
diff --git a/Hacking.md b/Hacking.md
new file mode 100644
index 00000000..ce2ceb30
--- /dev/null
+++ b/Hacking.md
@@ -0,0 +1,17 @@
+## Testing
+
+* [eNoCloud](gitolite@labs.enovance.com:ci-openstack-upgrade -b arch-tester)
+* [eDeploy-lxc](https://github.com/enovance/edeploy-lxc)
+
+
+## Syntax checks
+
+* [Vi plugin](https://github.com/scrooloose/syntastic)
+  1. Install syntastic (using bundle, see https://github.com/sbadia/grimvim/blob/master/vimrc#L21)
+  2. Install puppet and puppet-lint packages
+  3. Run vi [example](http://pub.sebian.fr/pub/syntastic.png)
+
+* Manual launch:
+  1. cd openstack-puppet-ci
+  2. bundle install (or create a rvm : rvm use ruby-1.9.3-p385;rvm gemset use puppet-dev)
+  3. rake lint