Brief

DOT is a graph description language from the Graphviz project.

While Graphviz provides a pretty-printing tool, it lacks a minification tool.

This tool minimizes .dot text to reduce data size.

Run the program natively

It takes input from stdin and outputs to stdout.

zig build -Doptimize=ReleaseSafe --release=small --summary all

zig-out/bin/dot-minify <<EOF
digraph G {

    // This is a comment
    splines = ortho

    a -> b;
}
EOF

stdout:

digraph G{splines=ortho a->b;}

Deploy .wasm to cloudflare workers

ref: https://blog.cloudflare.com/running-zig-with-wasi-on-cloudflare-workers/

zig build -Doptimize=ReleaseFast -Dtarget=wasm32-wasi --summary all 

npx wrangler@wasm publish --compatibility-date 2024-11-18 --name my-wasi-app zig-out/bin/dot-minify.wasm

usage

curl https://my-wasi-app.my-workers-tenant.workers.dev -X POST -d @- <<EOF
digraph G {

  subgraph cluster_0 {
    style=filled;
    color=lightgrey;
    node [style=filled,color=white];
    a0 -> a1 -> a2 -> a3;
    label = "process #1";
  }

  subgraph cluster_1 {
    node [style=filled];
    b0 -> b1 -> b2 -> b3;
    label = "process #2";
    color=blue
  }
  start -> a0;
  start -> b0;
  a1 -> b3;
  b2 -> a3;
  a3 -> a0;
  a3 -> end;
  b3 -> end;

  start [shape=Mdiamond];
  end [shape=Msquare];
}
EOF

response.body

digraph G{subgraph cluster_0{style=filled;color=lightgrey;node[style=filled,color=white];a0->a1->a2->a3;label="process #1";}subgraph cluster_1{node[style=filled];b0->b1->b2->b3;label="process #2";color=blue}start->a0;start->b0;a1->b3;b2->a3;a3->a0;a3->end;b3->end;start[shape=Mdiamond];end[shape=Msquare];}