Rails release_version bumper

release_version.rake

#######################################
# Author: Pradeep ([email protected]) #
# Reference: http://semver.org        #
#######################################
namespace :release_version do
  @tags =  %x[ git tag --sort version:refname ].split("\n")

  def current_tag
    @tags.last
  end

  def bump_version release_type, metadata
    current_version = current_tag.gsub("v","")
    major, minor, patch = current_version.split(".").map(&:to_i)

    case release_type
    when "major"
      major += 1
      minor = patch = 0
    when "minor"
      minor += 1
      patch = 0
    when "patch"
      patch += 1
    else # Default case
      patch += 1
    end

    "v#{major}.#{minor}.#{patch}"
  end

  def next_tag release_type="patch",metadata=nil
    bump_version(release_type,metadata)
  end

  desc 'Current release version'
  task current: [] do
    puts current_tag
  end

  desc 'Next major release version'
  task major: [] do
    puts next_tag "major"
  end

  desc 'Next minor release version'
  task minor: [] do
    puts next_tag "minor"
  end

  desc 'Next patch release version'
  task patch: [] do
    puts next_tag "patch"
  end
end

➜ Project git:(master) rake release_version:current
v2.8.3
➜ Project git:(master) rake release_version:patch
v2.8.4
➜ Project git:(master) rake release_version:minor
v2.9.0
➜ Project git:(master) rake release_version:major
v3.0.0