Prepend the jira-ticket-id into your commits

_usage.md

1. cd into a deliveroo repo directory
2. run:

curl -s https://gist.githubusercontent.com/scott-ad-riley/0d774a70452bd5bb118638b7dbed0176/raw/dde71f9489f2d01a6f048ec58d6f7f4cf93f63ce/prepare-commit-msg.rb > ./.git/hooks/prepare-commit-msg

3. That downloads the script in this gist (I promise) and puts it in a ./git/hooks/prepare-commit-msg file
4. You'll need to run this for each repo

N.B. It currently throws and prevents you from committing if your commit message starts with a different ticket number to the branch you're on (i.e. if you pass it PAY-1234: some message and you're on a branch that doesn't start PAY-1234/...)

N.B.B It shouldn't care if you want to use xxx as your commit message, aslong as it's at the beginning of your branch too.

If you can think of anything else that's worth adding (or if you don't like the guard against committing with the wrong ticket number let me know.

prepare-commit-msg.rb

#!/usr/bin/env ruby

# This is whatever your commit template currently is, plus whatever message is passed in
@original_message = File.read(ARGV[0])

# Get your current jira ticket number from your current branch
ticket_name = `git rev-parse --abbrev-ref HEAD`.match(/^(.*)\//)[1]

def prepend_message(msg)
  File.open(ARGV[0], 'w') { |f| f.write msg + @original_message }
end

if ARGV[1] == 'message'
  # if original message does not have the ticket number in it
  unless @original_message.match?(/\S*-\S*:/)
    # put the ticket name on the start of the message
    prepend_message(ticket_name + ": ") 
  else
    raise 'Looks like you are committing on the wrong branch' if !(@original_message.match(/^(.*):/)[1] == ticket_name)
  end
else
  prepend_message(ticket_name + ": ")
end