docker-credential-helper 0.4.2 (new formula)

Closes #10591.

Signed-off-by: FX Coudert <fxcoudert@gmail.com>

Formula/docker-credential-helper.rb

@@ -0,0 +1,28 @@
+class DockerCredentialHelper < Formula
+  desc "macOS Credential Helper for Docker"
+  homepage "https://github.com/docker/docker-credential-helpers"
+  url "https://github.com/docker/docker-credential-helpers/archive/v0.4.2.tar.gz"
+  sha256 "6fb414e71d5352165f43d87e1f711a6638b4ae3b8d4e20a5856a1eaddbd68e36"
+  head "https://github.com/docker/docker-credential-helpers.git"
+
+  depends_on "go" => :build
+
+  def install
+    ENV["GOPATH"] = buildpath
+    dir = buildpath/"src/github.com/docker/docker-credential-helpers"
+    dir.install buildpath.children - [buildpath/".brew_home"]
+
+    cd dir do
+      system "make", "vet_osx"
+      system "make", "osxkeychain"
+      bin.install "bin/docker-credential-osxkeychain"
+    end
+  end
+
+  test do
+    # A more complex test isn't possible as this tool operates using the macOS
+    # user keychain (incompatible with CI).
+    run_output = shell_output("#{bin}/docker-credential-osxkeychain", 1)
+    assert_match %r{^Usage: .*/docker-credential-osxkeychain.*}, run_output
+  end
+end