chef

https://github.com/opscode/chef

Ruby

A systems integration framework, built to bring the benefits of configuration management to your entire infrastructure.

Chef::Resource::Deploy#symlink_before_migrate

A Hash of shared/dir/path => release/dir/path. This attribute determines
which files in the shared directory get symlinked to the current release
directory and where they go. Unlike map_shared_files, these are symlinked
*before* any migration is run.
For a rails/merb app, this is used to link in a known good database.yml
(with the production db password) before running migrate.
Default {"config/database.yml" => "config/database.yml"}

Source | Google | Stack overflow

Edit

git clone [email protected]:opscode/chef.git

cd chef

open lib/chef/resource/deploy.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Chef--Resource--Deploy-symlink_before_migrate-for-pr

# Commit to git

git add lib/chef/resource/deploy.rbgit commit -m "better docs for Chef::Resource::Deploy#symlink_before_migrate"

# Open pull request

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

hub fork

git push <your name> -your-name--update-docs-Chef--Resource--Deploy-symlink_before_migrate-for-pr

hub pull-request

# Celebrate!