class Traefik < Formula
  desc "Modern reverse proxy"
  homepage "https://traefik.io/"
  url "https://github.com/containous/traefik/releases/download/v1.7.9/traefik-v1.7.9.src.tar.gz"
  version "1.7.9"
  sha256 "d9256a718da66b249fe26b4b603012afe9da18709185348eaeaa627579245503"
  head "https://github.com/containous/traefik.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "9c785d32508263eddea75b92bde5060d4d5c0d39ddd651661084de9471179d26" => :mojave
    sha256 "bc6a39ce9304c4a7381f67c8b167e56682266d6faf1a719387d4ae41e7f0f088" => :high_sierra
    sha256 "06c96240a79200d70ca6241564414d9addc07291635ee878c196ca129f66b057" => :sierra
  end

  depends_on "go" => :build
  depends_on "go-bindata" => :build
  depends_on "node" => :build
  depends_on "yarn" => :build

  def install
    ENV["GOPATH"] = buildpath
    (buildpath/"src/github.com/containous/traefik").install buildpath.children

    # Fix yarn + upath@1.0.4 incompatibility; remove once upath is upgraded to 1.0.5+
    Pathname.new("#{ENV["HOME"]}/.yarnrc").write("ignore-engines true\n")

    cd "src/github.com/containous/traefik" do
      cd "webui" do
        system "yarn", "install"
        system "yarn", "run", "build"
      end
      system "go", "generate"
      system "go", "build", "-o", bin/"traefik", "./cmd/traefik"
      prefix.install_metafiles
    end
  end

  plist_options :manual => "traefik"

  def plist
    <<~EOS
      <?xml version="1.0" encoding="UTF-8"?>
      <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
      <plist version="1.0">
        <dict>
          <key>KeepAlive</key>
          <false/>
          <key>Label</key>
          <string>#{plist_name}</string>
          <key>ProgramArguments</key>
          <array>
            <string>#{opt_bin}/traefik</string>
            <string>--configfile=#{etc/"traefik/traefik.toml"}</string>
          </array>
          <key>EnvironmentVariables</key>
          <dict>
          </dict>
          <key>RunAtLoad</key>
          <true/>
          <key>WorkingDirectory</key>
          <string>#{var}</string>
          <key>StandardErrorPath</key>
          <string>#{var}/log/traefik.log</string>
          <key>StandardOutPath</key>
          <string>#{var}/log/traefik.log</string>
        </dict>
      </plist>
    EOS
  end

  test do
    require "socket"

    web_server = TCPServer.new(0)
    http_server = TCPServer.new(0)
    web_port = web_server.addr[1]
    http_port = http_server.addr[1]
    web_server.close
    http_server.close

    (testpath/"traefik.toml").write <<~EOS
      [web]
      address = ":#{web_port}"

      [entryPoints.http]
      address = ":#{http_port}"
    EOS

    begin
      pid = fork do
        exec bin/"traefik", "--configfile=#{testpath}/traefik.toml"
      end
      sleep 5
      cmd = "curl -sIm3 -XGET http://localhost:#{web_port}/dashboard/"
      assert_match /200 OK/m, shell_output(cmd)
    ensure
      Process.kill("HUP", pid)
    end
  end
end