vagrant

https://github.com/mitchellh/vagrant

Ruby

Vagrant is a tool for building and distributing development environments.

Vagrant::Config::V2::Loader.upgrade

Upgrade a V1 configuration to a V2 configuration. We do this by
creating a V2 configuration, and calling "upgrade" on each of the
V1 configurations, expecting them to set the right settings on the
new root.

Source | Google | Stack overflow

Edit

git clone [email protected]:mitchellh/vagrant.git

cd vagrant

open lib/vagrant/config/v2/loader.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Vagrant--Config--V2--Loader-upgrade-for-pr

# Commit to git

git add lib/vagrant/config/v2/loader.rbgit commit -m "better docs for Vagrant::Config::V2::Loader.upgrade"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-Vagrant--Config--V2--Loader-upgrade-for-pr

hub pull-request

# Celebrate!