go13.rb

class Go13 < Formula
  homepage "https://golang.org"
  url "https://storage.googleapis.com/golang/go1.3.3.src.tar.gz"
  version "1.3.3"
  sha256 "1bb6fde89cfe8b9756a875af55d994cce0994861227b5dc0f268c143d91cd5ff"

  bottle do
    sha256 "da04cd0a9ed7aba226a83abcb2bb1232592eb821cdfdc5fce3714806ea612987" => :yosemite
    sha256 "8a37cb9684cb97b5ddf0fea297aef89a8dfeca8c73cb03631aaa26fbbae20879" => :mavericks
    sha256 "8b2f2390a6b251147ba61a70b6d1be6d8ca96ea38dc0ce39290ae88ab4d0f0b8" => :mountain_lion
  end

  option "with-cc-all", "Build with cross-compilers and runtime support for all supported platforms"
  option "with-cc-common", "Build with cross-compilers and runtime support for darwin, linux and windows"
  option "without-cgo", "Build without cgo"
  option "without-godoc", "godoc will not be installed for you"
  option "without-vet", "vet will not be installed for you"

  deprecated_option "cross-compile-all" => "with-cc-all"
  deprecated_option "cross-compile-common" => "with-cc-common"

  resource "gotools" do
    url "https://go.googlesource.com/tools.git",
    :revision => "69db398fe0e69396984e3967724820c1f631e97"
  end

  def install
    # install the completion scripts
    bash_completion.install "misc/bash/go" => "go-completion.bash"
    zsh_completion.install "misc/zsh/go" => "go"

    # host platform (darwin) must come last in the targets list
    if build.with? "cc-all"
      targets = [
        ["linux",   ["386", "amd64", "arm"]],
        ["freebsd", ["386", "amd64"]],
        ["netbsd",  ["386", "amd64"]],
        ["openbsd", ["386", "amd64"]],
        ["windows", ["386", "amd64"]],
        ["darwin",  ["386", "amd64"]],
      ]
    elsif build.with? "cc-common"
      targets = [
        ["linux",   ["386", "amd64", "arm"]],
        ["windows", ["386", "amd64"]],
        ["darwin",  ["386", "amd64"]],
      ]
    else
      targets = [["darwin", [""]]]
    end

    cd "src" do
      targets.each do |os, archs|
        cgo_enabled = os == "darwin" && build.with?("cgo") ? "1" : "0"
        archs.each do |arch|
          ENV["GOROOT_FINAL"] = libexec
          ENV["GOOS"]         = os
          ENV["GOARCH"]       = arch
          ENV["CGO_ENABLED"]  = cgo_enabled
          system "./make.bash", "--no-clean"
        end
      end
    end

    (buildpath/"pkg/obj").rmtree

    libexec.install Dir["*"]
    bin.install_symlink Dir["#{libexec}/bin/go*"]

    if build.with?("godoc") || build.with?("vet")
      ENV.prepend_path "PATH", bin
      ENV["GOPATH"] = buildpath
      (buildpath/"src/golang.org/x/tools").install resource("gotools")

      if build.with? "godoc"
        cd "src/golang.org/x/tools/cmd/godoc/" do
          system "go", "build"
          (libexec/"bin").install "godoc"
        end
        bin.install_symlink libexec/"bin/godoc"
      end

      if build.with? "vet"
        cd "src/golang.org/x/tools/cmd/vet/" do
          system "go", "build"
          # This is where Go puts vet natively; not in the bin.
          (libexec/"pkg/tool/darwin_amd64/").install "vet"
        end
      end
    end
  end

  def caveats; <<-EOS.undent
    As of go 1.2, a valid GOPATH is required to use the `go get` command:
      http://golang.org/doc/code.html#GOPATH

    You may wish to add the GOROOT-based install location to your PATH:
      export PATH=$PATH:#{opt_libexec}/bin
    EOS
  end

  test do
    (testpath/"hello.go").write <<-EOS.undent
    package main

    import "fmt"

    func main() {
        fmt.Println("Hello World")
    }
    EOS
    # Run go fmt check for no errors then run the program.
    # This is a a bare minimum of go working as it uses fmt, build, and run.
    system bin/"go", "fmt", "hello.go"
    assert_equal "Hello World\n", `#{bin}/go run hello.go`
  end
end