git commit wrapper script

gitcommit

#!/usr/bin/env ruby
# A wrapper around "git commit" that provides a template message
# conforming to RentPath conventions.
# Assumes branches are named with the following components separated
# by underscores:
# 1. developer initials (one or more of these components are allowed)
# 2. story number
# 3. free text description (optional; may contain underscores)
# Examples:
# "sb_12345_fix_serious_bug"
# "sb_zh_67890" (two devs, no optional description)

require 'tempfile'

branch_name = `git rev-parse --abbrev-ref HEAD`.chomp
abort if branch_name == ''
initials = 'XX'
number = '00000'
components = branch_name.split('_')
number_idx = components.find_index { |x| x.match /\d/ }
if number_idx
  number = components[number_idx]
  initials = components[0...number_idx].join('/').upcase
end
template_string = "[#{initials}][#{number}] "

file = Tempfile.new('commit-template')
file.write(template_string)
file.close
begin
  cmd = "git commit --template=#{file.path} #{ARGV.join(' ')}"
  system(cmd)
ensure
  file.unlink
end