How to install specific Gradle Version?

gradle.rb

# brew install --build-from-source ./gradle.rb 
# All Gradle version - https://gist.github.com/l1x/d8ba66343fceb927d691
# Install Gradle from local Formule - https://github.com/Homebrew/brew/issues/1468
# Or you can download distribution from official site https://services.gradle.org/distributions/
# When you run the above local Formule build and if the build fails with sha mismath, Replace sha256 below with the Actual sha256 returned by your run also don't forget to replace gradle version in url
# Below is sample Gradle class
class Gradle < Formula
  desc "Build system based on the Groovy language"
  homepage "https://www.gradle.org/"
  url "https://services.gradle.org/distributions/gradle-2.13-all.zip"
  sha256 "fb126ed684150f9dc39a811cbcf4daada4292fd387ed998c151ff2cf2536d94d"

  bottle :unneeded

  option "with-all", "Installs Javadoc, examples, and source in addition to the binaries"

  depends_on :java => "1.7+"

  def install
    rm_f Dir["bin/*.bat"]
    libexec.install %w[bin lib]
    libexec.install %w[docs media samples src] if build.with? "all"
    (bin/"gradle").write_env_script libexec/"bin/gradle", Language::Java.overridable_java_home_env
  end

  test do
    assert_match version.to_s, shell_output("#{bin}/gradle --version")
  end
end