Tagging Script

tag_script.rb

#!/usr/bin/ruby

BRANCH_REGEX = /(hotfix|patch|release)\/\d{4}_\d{2}_\d{2}/

def check_input(string, branch_name)
  while true
    puts string
    input = gets
    if input.start_with?('y') || input.start_with?('Y')
      # the user wants to continue, exit loop.
      break
    elsif input.start_with?('n') || input.start_with?('N')
      # something went wrong, abort and exit out
      `git checkout #{branch_name}`
      puts "Aborting now."
      exit 1
    else
      # unexpected input
      puts "I didn't understand, please enter 'Y' or 'N'."
    end
  end
end

branch_name = `git rev-parse --abbrev-ref HEAD`.strip
last_commit = `git log --pretty=format:'%H' -n 1`

unless BRANCH_REGEX.match(branch_name)
  puts "Aborting now: branch name is not a hotfix|patch|release"
  exit 1
end

check_input("We are going to tag this sha: #{last_commit} is this correct? Y|N", branch_name)
tag_name = BRANCH_REGEX.match(branch_name)[0] + "_#{Time.now.hour.to_s.rjust(2, '0')}#{Time.now.min.to_s.rjust(2, '0')}"

# checkout master
`git checkout master`
# pulling the latest code from master
`git pull`


last_master_sha = `git log --pretty=format:'%H' -n 1`

# ensure that the head of master is contained in what we are tagging
branches_containing_master = `git branch --contains #{last_master_sha}`
branches_containing_master = branches_containing_master.split("\n").map(&:strip)
unless branches_containing_master.include? branch_name
  `git checkout #{branch_name}` # ensure that we switch back to the original branch
  puts "Aborting now: branch does not contain the head of master."
  exit 1
end

check_input("We are about to make tag: #{tag_name} is this correct? Y|N", branch_name)

`git checkout #{branch_name}`
puts "Making tag: #{tag_name}"
`git tag #{tag_name}`
puts "Pushing #{tag_name} up to origin."
`git push origin #{tag_name}`

A script I am writing to make tagging for releases more automated.