docker-compose-completion: import from homebrew/completions.

Formula/docker-compose-completion.rb

@@ -0,0 +1,22 @@
+class DockerComposeCompletion < Formula
+  desc "docker-compose completion script"
+  homepage "https://docs.docker.com/compose/completion/"
+  url "https://github.com/docker/compose/archive/1.10.0.tar.gz"
+  sha256 "0277930feaeb03f480914274f65eb419a2ee4b48be9a9fb55a201bb3a14bf290"
+  head "https://github.com/docker/compose.git"
+
+  bottle :unneeded
+
+  conflicts_with "docker-compose",
+    :because => "docker-compose already includes completion scripts"
+
+  def install
+    bash_completion.install "contrib/completion/bash/docker-compose"
+    zsh_completion.install "contrib/completion/zsh/_docker-compose"
+  end
+
+  test do
+    assert_match "-F _docker_compose",
+      shell_output("bash -c 'source #{bash_completion}/docker-compose && complete -p docker-compose'")
+  end
+end