@startdot
digraph DockerDeps {
  //rankdir=BT;
  rankdir=TD;
  node [shape=cylinder, style="rounded,filled", color=black, fillcolor=royalblue];
  DISTRO_IMG [label="<distro>:latest"];
  PKG [label="packages\ne.g. bazel, g++", shape=box3d];
  SRC [label="git repo", shape=folder];

  subgraph clusterDockerfile {
    ENV_IMG [label="ortools/bazel:<distro>_env\nenv"];
    DEVEL_IMG [label="ortools/bazel:<distro>_devel\ndevel"];
    BUILD_IMG [label="ortools/bazel:<distro>_build\nbuild"];
    TEST_IMG [label="ortools/bazel:<distro>_test\ntest"];

    edge [color=black];
    ENV_IMG -> DEVEL_IMG;
    DEVEL_IMG -> BUILD_IMG;
    BUILD_IMG -> TEST_IMG;

    color=royalblue;
    label = "docker/<distro>/Dockerfile";
  }
  DISTRO_IMG -> ENV_IMG;
  PKG -> ENV_IMG [label="install", style="dashed"];
  SRC -> DEVEL_IMG [label="copy", style="dashed"];

  subgraph clusterCache {
    node [shape=note, style="rounded,filled", color=black, fillcolor=royalblue];
    ENV_TAR [label="docker_env.tar"];
    DEVEL_TAR [label="docker_devel.tar"];
    BUILD_TAR [label="docker_build.tar"];
    TEST_TAR [label="docker_test.tar"];

    edge [color=red];
    ENV_IMG -> ENV_TAR [label="make save_<distro>_env"];
    DEVEL_IMG -> DEVEL_TAR [label="make save_<distro>_devel"];
    BUILD_IMG -> BUILD_TAR [label="make save_<distro>_build"];
    TEST_IMG -> TEST_TAR [label="make save_<distro>_test"];

    color=royalblue;
    label = "cache/<distro>/";
  }
}
@enddot