gistfile1.rb

#!/usr/bin/env ruby

require 'open3'

begin
  stdout, status = Open3.capture2("git status  -uno --porcelain")
rescue Errno::ENOENT
  abort "Cannot run `git status  -uno --porcelain`."
end

unless status.exitstatus == 0
  abort "git status failed - is this a git repository?"
end

branch, err = Open3.capture2('git symbolic-ref --short HEAD')

branch.strip!

user, err = Open3.capture2('git config github.user')

repo_name, err = Open3.capture2('basename `git rev-parse --show-toplevel`')

exec("google-chrome 'https://github.com/#{user}/#{repo_name}/compare/OrganisedMinds:#{branch}...#{user}:#{branch}'")