git commit-msg hook that replaces STORYID with the story id from the branch name (s-123, s123, t123, t-123)

commit-msg

#!/usr/bin/env ruby

if match = `git symbolic-ref HEAD 2> /dev/null`.split('/').last.to_s.match(/^(?:t|s)-?(\d+)$/)
  message = File.read(ARGV.first)
  message.gsub!("STORYID", "[##{ match[1] }]")
  File.open(ARGV.first, 'w') do |f|
    f.puts(message)
  end
end