Script to generate `mermaid` diagrams

generate-mermaid.mjs

//jshint esversion:8
//jshint node:true
import fs from 'fs';
import path from 'path';
import { run as mermaidRun } from "@mermaid-js/mermaid-cli"

const srcDir = "./mermaid";
const dstDir = "./generated";
const outputFormat = "png";

const puppeteerConfig = ({
    headless: 1
});
const quiet = true;


(async () => {
    try {
        const files = await fs.promises.readdir(srcDir);

        for (const file of files.filter(fn => fn.endsWith('.mmd'))) {

            const imageName = path.parse(file).name;
            const dstFilename = imageName + '.' + outputFormat;

            const input = path.join(srcDir, file);
            const output = path.join(dstDir, dstFilename);

            const statInput = await fs.promises.stat( input );
            try {
                const statOutput = await fs.promises.stat( output );

                if ( statOutput.isFile() && statOutput.mtime >= statInput.mtime) {
                    console.log("Skipping '%s' because it is already newer than '%s'", output, input);
                    continue;
                }
            }
            catch (e) {

            }

            console.log("Generating '%s'->'%s'", input, output);

            await mermaidRun(
                input,
                output,
                {
                    puppeteerConfig,
                    quiet,
                    outputFormat,
                    //parseMMDOptions: {
                    //    mermaidConfig, backgroundColor, myCSS, pdfFit, viewport: { width, height, deviceScaleFactor: scale }, svgId
                    //}
                }
            )
        }
    }
    catch (e) {
        console.error("We've thrown! Whoops!", e);
    }

    console.info("Mermaid Generation Done.");

})();