Tekton Pipeline graphviz generator

[imjasonh]

kubectl get pipeline foo | tknviz | dot -Tpng ...

Ideas:

• show steps inside tasks too
• show PipelineRuns, where finished successful TaskRuns are green, unsuccessful red, skipped due to when gray, etc.

[mattmoor]

Have you seen n3wscott/graph?

[imjasonh]

Very nice. I think he had some cgo-less graphviz SVG thing I wanted to use right?

@n3wscott @jonjohnsonjr

Graphviz squad assemble

[mattmoor]

y'all should check out mermaid diagrams too, I hear they are the new hotness (or so my daughter tells me).

[n3wscott]

Take a look at https://github.com/n3wscott/go-graphviz

I forked go-graphviz and removed all the cgo parts. I also found it is not great at making dot files, but I use it like this:

    graph, err := graphviz.ParseBytes(g.Dot(opts))
    if err != nil {
        return err
    }

    gv := graphviz.New()
    defer func() {
        if err := graph.Close(); err != nil {
            log.Fatal(err)
        }
        _ = gv.Close()
    }()

    return gv.RenderFilename(graph, graphviz.SVG, file)

I make dot files by hand (or generated) and then pass it to this parser and it spits out an SVG., good enough for me.

[imjasonh]

I hacked this up: https://gist.github.com/imjasonh/ff2d293540b578efb433110d8e9c2a20

(green rectangles are pipeline params, red rectangles are pipeline results)

It's pretty noisy, and it's not even that complicated. I may play with it more.