gox 0.4.0 (new formula)

Closes #22005.

Signed-off-by: ilovezfs <ilovezfs@icloud.com>

Formula/gox.rb

@@ -0,0 +1,42 @@
+class Gox < Formula
+  desc "Go cross compile tool"
+  homepage "https://github.com/mitchellh/gox"
+  url "https://github.com/mitchellh/gox/archive/v0.4.0.tar.gz"
+  sha256 "2df7439e9901877685ff4e6377de863c3c2ec4cde43d0ca631ff65d1b64774ad"
+  head "https://github.com/mitchellh/gox.git"
+
+  depends_on "go"
+
+  resource "iochan" do
+    url "https://github.com/mitchellh/iochan.git",
+        :revision => "87b45ffd0e9581375c491fef3d32130bb15c5bd7"
+  end
+
+  # This resource is for the test so doesn't really need to be updated.
+  resource "pup" do
+    url "https://github.com/ericchiang/pup/archive/v0.4.0.tar.gz"
+    sha256 "0d546ab78588e07e1601007772d83795495aa329b19bd1c3cde589ddb1c538b0"
+  end
+
+  def install
+    ENV["GOPATH"] = buildpath
+    (buildpath/"src/github.com/mitchellh/gox").install buildpath.children
+    (buildpath/"src/github.com/mitchellh/iochan").install resource("iochan")
+    cd "src/github.com/mitchellh/gox" do
+      system "go", "build", "-o", bin/"gox"
+      prefix.install_metafiles
+    end
+  end
+
+  test do
+    ENV["GOPATH"] = testpath
+    (testpath/"src/github.com/ericchiang/pup").install resource("pup")
+    cd "src/github.com/ericchiang/pup" do
+      output = shell_output("#{bin}/gox -arch amd64 -os darwin -os freebsd")
+      assert_match "parallel", output
+      assert_predicate Pathname.pwd/"pup_darwin_amd64", :executable?
+      assert_predicate Pathname.pwd/"pup_freebsd_amd64", :executable?
+      refute_predicate Pathname.pwd/"pup_linux_amd64", :exist?
+    end
+  end
+end