导入.dot文件作为子图 [英] Importing .dot file as subgraph

问题描述

是否存在-通过语言功能或通过前置处理程序-是否可能将外部.dot文件作为子图包含到另一个文件中?

Is there -- either via a language feature or via a preporcessor -- a possiblity to include external .dot files as subgraphs into another one?

我正在处理一个相对较大的图，尽管它是手动维护的，而不是生成的.

I am working on a relatively big graph, though manually maintained, not generated.

可以方便地定义一些

subgraph01.dot:

digraph subgraph01 {
 /* lot of nodes and edges */
}

subgraph02.dot:

digraph subgraph02 {
 /* lot of nodes and edges */
}

然后执行类似graph.dot的操作:

digraph BigGraph {
    import subgraph01;
    import subgraph02;
    A -> subgraph01.Node1
    A -> subgraph02.Node1
    subgraph01.Node10 -> subgraph02.Node99
    /* etc. */
}

有办法吗?

推荐答案

我立即想到了两个选择.一种方法是使用宏处理器，例如 m4 .给定BigGraph.m4:

Two options immediately occur to me. One would be to use a macro processor, e.g. m4. Given BigGraph.m4:

digraph BigGraph {
    define(`digraph',`subgraph')
    include(`subgraph01.dot')
    include(`subgraph02.dot')
    A -> subgraph01.Node1
    A -> subgraph02.Node1
    subgraph.Node10 -> subgraph.Node99
    /* etc. */
}

...正在运行:

$ m4 BigGraph.m4 

...产生:

digraph BigGraph {
    subgraph subgraph01 {
 /* lot of nodes and edges */
}


    subgraph subgraph02 {
 /* lot of nodes and edges */
}


    A -> subgraph01.Node1
    A -> subgraph02.Node1
    subgraph.Node10 -> subgraph.Node99
    /* etc. */
}

另一个可能允许使用更复杂方法的选项是使用 GraphViz中的 gvpr .我尝试创建一个使用gvpr进行此操作的示例，但是我没有成功，因此，我建议仅在需要图形感知方法而不是使用m4的简单方法的情况下尝试此操作.

Another option that might allow a more sophisticated approach is to use gvpr from GraphViz. I tried to create an example to do this with gvpr, however and I was unsuccessful, so I suggest only trying it if a graph-aware approach is required rather than the simple approach using m4.

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