.git/hooks/commit-msg: git commit hook that auto adding message of associating issue and rollbar error issue

commit-msg.rb

#!/usr/bin/env ruby

current_branch = `git symbolic-ref --short HEAD`
if /^iss-(\d+).*/ =~ current_branch
  commit_msgs = File.readlines(ARGV[0])
  issue_id = $1

  puts 'setup `ghi` command via https://github.com/stephencelis/ghi' unless system('which ghi > /dev/null 2>&1')
  %r{https://rollbar.com/.+/items/(\d+)} =~ `ghi show #{issue_id}`
  rollbar_item_id = $1

  open(ARGV[0], 'w') do |file|
    file.print "refs ##{issue_id} " if %r(##{issue_id}) !~ commit_msgs.join()
    file.print "fixed rb##{rollbar_item_id} " if rollbar_item_id && %r(##{rollbar_item_id}) !~ commit_msgs.join()
    file.puts commit_msgs
  end
end