A script to bump a project's version number in git.

git-bump-version

#!/usr/bin/env ruby
# Bump the version of the current git project
# 
# Installation instructions: copy to /usr/local/bin/git-bump-version and set
# permissions to 0755.
#
# Author: Scott Woods <scott@westarete.com>
# Ref: https://gist.github.com/woods/7424599

require 'rubygems'
gem 'colored'
gem 'versionomy'
require 'colored'
require 'versionomy'

begin
  ARGV.length == 1 or raise ArgumentError
  level = ARGV.first.to_sym
  [:major, :minor, :tiny].include?(level) or raise ArgumentError
rescue ArgumentError => e
  puts "Usage: git bump-version {major|minor|tiny}"
  exit 1
end
 
unless `git branch` =~ /^\* master$/
  puts "You must be on the master branch to bump versions"
  exit 1
end

def run(cmd)
  puts cmd.red
  system cmd or exit $?.exitstatus
  puts
end

run "git fetch"

version_strings = `git tag`.split.select { |s| s =~ /\d\.\d/ }
current_version = version_strings.map { |s| Versionomy.parse(s) }.sort.last
new_version = current_version.bump(level)

current_revision = `git show`.split(/\n/).first.chomp.split(/ /).last
last_tagged_revision = `git show #{current_version}`.split(/\n/).first.chomp.split(/ /).last
if current_revision == last_tagged_revision
  puts "No action taken -- the current revision is already tagged (as #{current_version})"
  exit 1
end

puts "Bumping #{current_version} -> #{new_version}\n\n"

run "git tag #{new_version}"
run "git push"
run "git push --tags"

install.sh

# Install the git-bump-version script

curl -so /usr/local/bin/git-bump-version https://gist.github.com/woods/7424599/raw/git-bump-version
chmod 755 /usr/local/bin/git-bump-version
if ! grep -q gbv ~/.bashrc ; then
  echo "alias gbv='git-bump-version'" >> ~/.bashrc
  source ~/.bashrc
fi