commit-msg

#!/usr/bin/env ruby

message_file = ARGV[0]
original_message = File.read(message_file)

current_branch = `git rev-parse --abbrev-ref HEAD`

story_number_regex = /[a-zA-Z]+-[0-9]+/
regex_match = current_branch.match(story_number_regex)
message_match = original_message.match(story_number_regex)

message = if regex_match
  if message_match
    original_message
  else
    story_number = regex_match[0].upcase
    "#{story_number} #{original_message}"
  end
else
  original_message
end

File.open(message_file, 'w') { |f| f.write message }