#!/usr/bin/env ruby

# Configures the git author to a list of developers when pair programming,

# alphabetized on first name

#

# Usage: git pair ls gw (Sets the author to 'Greg Woodward & Loren Siebert')

# git pair (Unsets the author so the git global config takes effect)

#

# Orginal Author: Bryan Helmkamp (http://brynary.com)

#######################################################################

require 'yaml'

unless File.exists?(".git")

puts "This doesn't look like a git repository."

exit 1

end

## Configuration

def get_pairs_config

pairs_file_path = nil

until pairs_file_path || Dir.pwd == File.expand_path('/') do

if File.exists?(".pairs")

pairs_file_path = File.expand_path(".pairs")

else

Dir.chdir ".."

end

end

unless pairs_file_path

puts <<-INSTRUCTIONS

Could not find a .pairs file. Create a YAML file in your project or home directory.

Format: <initials>: <name>[; <email>]

Example:

# .pairs - configuration for 'git pair'

# place in project or home directory

pairs:

eh: Edward Hieatt

js: Josh Susser; jsusser

sf: Serguei Filimonov; serguei

email:

prefix: pair

domain: pivotallabs.com

INSTRUCTIONS

exit(1)

end

pairs_file_path ? YAML.load_file(".pairs") : {}

end

## End of configuration

#######################################################################

config = get_pairs_config

authors = ARGV.map do |initials|

if full_name = config['pairs'][initials.downcase]

full_name

else

puts "Couldn't find author name for initials: #{initials}. Add this person to the .pairs file in your project or home directory."

exit 1

end

end

if authors.any?

authors.sort!.uniq!

names, emails = authors.collect do |a|

both = a.split(";").collect {|s| s.strip}

both << both[0].split(' ').first.downcase if both.length == 1 # default email to first name

both

end.transpose

case authors.size

when 1

authors = names.first

when 2

authors = names.join(" & ")

else

authors = names[0..-2].join(", ") + " & " + names.last

end

email =

if email_prefix = config['email']['prefix']

"#{([config['email']['prefix']] + emails).join('+')}@#{config['email']['domain']}"

else

config['email']

end

system("git", "config", "--global", "user.name", "#{authors}")

system("git", "config", "--global", "user.email", "#{email}")

else

`git config --global --unset user.name`

`git config --global --unset user.email`

puts "Unset user.name and user.email"

end

puts `git config --global -l | grep user | tail -2`