Bumping version on a podspec when using CocoaPods

Rakefile.rb

task default: %w[version]

version_sizes = ["major", "minor", "patch"]

task :version, [:version_size] do |t, args|
  args.with_defaults(:version_size => "patch")
  version_size = args.version_size

  unless version_sizes.include?(version_size)
    fail "invalid version size, please use: major, minor, or patch"
  end

  version_size_index = version_sizes.index(version_size)

  # get current podspec, parse current version
  podspec_path = Rake::FileList["*.podspec"].to_s()
  podspec_content = File.read(podspec_path)
  current_version = podspec_content.match(/\.version\s+=\s+['"](.+)['"]$/)[1]
  current_version_arr = current_version.split(".").map! { |x|
    x.to_i()
  }

  # up the version based on version_size
  current_version_arr[version_size_index] += 1

  # get new version
  new_version = current_version_arr.join(".")

  # replace version string
  unless podspec_content.gsub!(/(\.version\s+=\s+)['"](.+)['"]$/, "\\1\"#{new_version}\"")
    raise "Unable to up the version"
  end
  
  # write file
  File.open(podspec_path, 'w') { |f| f << podspec_content }

  print(new_version)
end

meh