docker-gen 0.7.4

build from source

Closes #22866.

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

Formula/docker-gen.rb

@@ -1,16 +1,46 @@
+require "language/go"
+
 class DockerGen < Formula
   desc "Generate files from docker container metadata"
   homepage "https://github.com/jwilder/docker-gen"
-  url "https://github.com/jwilder/docker-gen/releases/download/0.7.3/docker-gen-darwin-amd64-0.7.3.tar.gz"
-  sha256 "bff27c3701facecd2488a830cb68f369b03143f1ef942f261cc879e64b36d790"
+  url "https://github.com/jwilder/docker-gen/archive/0.7.4.tar.gz"
+  sha256 "7951b63684e4ace9eab4f87f0c5625648f8add2559fa7779fabdb141a8a83908"
 
-  bottle :unneeded
+  depends_on "go" => :build
+
+  go_resource "github.com/agtorre/gocolorize" do
+    url "https://github.com/agtorre/gocolorize.git",
+        :revision => "99fea4bc9517f07eea8194702cb7076f4845b7de"
+  end
+
+  go_resource "github.com/robfig/glock" do
+    url "https://github.com/robfig/glock.git",
+        :revision => "428181ba14e0e3722090fe6e63402643a099e8bd"
+  end
+
+  go_resource "golang.org/x/tools" do
+    url "https://go.googlesource.com/tools.git",
+        :revision => "fbec762f837dc349b73d1eaa820552e2ad177942"
+  end
 
   def install
-    bin.install "docker-gen"
+    ENV["GOPATH"] = buildpath
+    (buildpath/"src/github.com/jwilder/docker-gen").install buildpath.children
+    Language::Go.stage_deps resources, buildpath/"src"
+
+    cd "src/github.com/robfig/glock" do
+      system "go", "install"
+    end
+
+    cd "src/github.com/jwilder/docker-gen" do
+      system buildpath/"bin/glock", "sync", "github.com/jwilder/docker-gen"
+      system "go", "build", "-ldflags", "-X main.buildVersion=#{version}", "-o",
+             bin/"docker-gen", "./cmd/docker-gen"
+      prefix.install_metafiles
+    end
   end
 
   test do
-    system "#{bin}/docker-gen", "--version"
+    assert_match version.to_s, shell_output("#{bin}/docker-gen --version")
   end
 end