@hpcc-js/wasm-graphviz-cli/bin/index.js

hpcc-js - WASM Graphviz Cli

#!/usr/bin/env node

// src/main.ts
import fs from "fs";
import * as yargs from "yargs";
import { hideBin } from "yargs/helpers";
import { Graphviz } from "@hpcc-js/wasm-graphviz";
async function main() {
  const myYargs = yargs.default(hideBin(process.argv));
  myYargs.usage("Usage: dot-wasm [options] fileOrDot").demandCommand(0, 1).example("dot-wasm -K neato -T xdot ./input.dot", "Execute NEATO layout and outputs XDOT format.").alias("K", "layout").nargs("K", 1).describe("K", "Set layout engine (circo | dot | fdp | sfdp | neato | osage | patchwork | twopi | nop | nop2). By default, dot is used.").alias("T", "format").nargs("T", 1).describe("T", "Set output language to one of the supported formats (svg | dot | json | dot_json | xdot_json | plain | plain-ext). By default, svg is produced.").alias("n", "neato-no-op").nargs("n", 1).describe("n", 'Sets no-op flag in neato.  "-n 1" assumes neato nodes have already been positioned and all nodes have a pos attribute giving the positions. It then performs an optional adjustment to remove node-node overlap, depending on the value of the overlap attribute, computes the edge layouts, depending on the value of the splines attribute, and emits the graph in the appropriate format.\n"-n 2" Use node positions as specified, with no adjustment to remove node-node overlaps, and use any edge layouts already specified by the pos attribute. neato computes an edge layout for any edge that does not have a pos attribute. As usual, edge layout is guided by the splines attribute.').alias("y", "invert-y").nargs("y", 0).describe("y", "By default, the coordinate system used in generic output formats, such as attributed dot, extended dot, plain and plain-ext, is the standard cartesian system with the origin in the lower left corner, and with increasing y coordinates as points move from bottom to top. If the -y flag is used, the coordinate system is inverted, so that increasing values of y correspond to movement from top to bottom.").nargs("v", 0).describe("v", "Echo GraphViz library version").help("h").alias("h", "help").epilog("https://github.com/hpcc-systems/hpcc-js-wasm");
  const argv = await myYargs.argv;
  try {
    let dot;
    if (fs.existsSync(argv._[0])) {
      dot = fs.readFileSync(argv._[0], "utf8");
    } else {
      dot = argv._[0];
    }
    const graphviz = await Graphviz.load();
    if (argv.v) {
      console.log(`GraphViz version:  ${graphviz.version()}`);
    } else if (dot) {
      if (argv.n && argv.layout.trim() !== "neato") {
        throw new Error("-n option is only supported with -T neato");
      }
      const ext = {};
      if (argv.n) {
        ext.nop = parseInt(argv.n);
      }
      if (argv.y) {
        ext.yInvert = true;
      }
      const response = graphviz.layout(dot, argv.format?.trim() ?? "svg", argv.layout?.trim() ?? "dot", ext);
      console.log(response);
    } else {
      throw new Error("'fileOrDot' is required.");
    }
  } catch (e) {
    console.error(`Error:  ${e?.message}
`);
    myYargs.showHelp();
  }
}

// src/index.ts
await main();
//# sourceMappingURL=index.js.map