chef

https://github.com/opscode/chef

Ruby

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

Chef::Provider::User::Dscl#dscl_set_gid

Sets the group id for the user using dscl. Fails if a group doesn't
exist on the system with given group id. If `gid` is not specified, it
sets a default Mac user group "staff", with id 20.

Source | Google | Stack overflow

Edit

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

cd chef

open lib/chef/provider/user/dscl.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Chef--Provider--User--Dscl-dscl_set_gid-for-pr

# Commit to git

git add lib/chef/provider/user/dscl.rbgit commit -m "better docs for Chef::Provider::User::Dscl#dscl_set_gid"

# 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--Provider--User--Dscl-dscl_set_gid-for-pr

hub pull-request

# Celebrate!