gistfile1.rb

#!/usr/bin/env ruby

# Configures the git author to a list of developers when pair programming
# 
# Usage: pair cr pf (Sets the author to 'Charlie Robbins, and Paolo Fragomeni')
#        pair       (Unsets the author so the git global config takes effect)
# 
# Author: Bryan Helmkamp (http://brynary.com)

#######################################################################
## Configuration

PAIR_EMAIL = "charlie.robbins@gmail.com"

AUTHORS = {
  "cr" => "Charlie Robbins",
  "pf" => "Paolo Fragomeni",
  "ms" => "Marak Squires"
}

## End of configuration
#######################################################################

unless File.exists?(".git")
  puts "This doesn't look like a git repository."
  exit 1
end

authors = ARGV.map do |initials|
  if AUTHORS[initials.downcase]
    AUTHORS[initials.downcase]
  else
    puts "Couldn't find author name for initials: #{initials}"
    exit 1
  end
end

if authors.any?
  if authors.size == 1
    authors = authors.first
  elsif authors.size == 2
    authors = authors.join(" and ")
  else
    authors = authors[0..-2].join(", ") + " and " + authors.last
  end
  
  `git config user.name '#{authors}'`
  `git config user.email '#{PAIR_EMAIL}'`
  
  puts "user.name = #{authors}"
  puts "user.email = #{PAIR_EMAIL}"
else
  `git config --unset user.name`
  `git config --unset user.email`
  
  puts "Unset user.name and user.email"
end