yargsConfig.js

const yargs = require("yargs/yargs");
const { hideBin } = require("yargs/helpers");
const fs = require("fs");
const path = require("path");

const argv = yargs(hideBin(process.argv))
  .usage("Usage: node $0 <command> [options]")
  .help("h")
  .option("i", {
    alias: "input",
    demandOption: true,
    default: ".",
    describe: "file argument",
    type: "string",
  })
  .option("o", {
    alias: "output",
    demandOption: true,
    default: "./dist",
    describe: "output folder for html files.",
    type: "string",
  })
  .option("s", {
    alias: "stylesheet",
    demandOption: false,
    describe: "stylesheet to be applied to html files.",
    type: "string",
  })
  .option("l", {
    alias: "lang",
    demandOption: false,
    describe: "language for the HTML document.",
    type: "string",
  })
  .option("c", {
    alias: "config",
    demandOption: false,
    describe: "Accept a file path to a JSON config file.",
  })
  .alias("h", "help")
  .alias("v", "version")
  .alias("i", "input")
  .alias("o", "output")
  .alias("s", "stylesheet")
  .command("--input", "Convert lines in a text file to HTML <p> tags.")
  .example("textToHTML: node textToHTML.js -i <filename>.").argv;

if (argv.o === "./dist") {
  if (fs.existsSync("./dist")) {
    fs.rmSync("./dist", { recursive: true }, (error) => {
      if (error) {
        console.log("Error removing dist directory.");
        process.exitCode = -1;
      }
    });
  } //end of ./dist code
  fs.mkdir("./dist", (error) => {
    if (error) {
      console.log("Error creating dist directory.");
      process.exitCode = -1;
    }
  });
}
//add config
if (argv.c) {
  try {
    const configJson = fs.readFileSync(path.normalize(argv.c));
    const con = JSON.parse(configJson);
    argv.input = con.input;
    argv.stylesheet = con.stylesheet;
    argv.lang = con.lang;
    argv.output = con.output || "./dist";
  } catch (err) {
    console.log("Error: Could not read config.json file");
    process.exitCode = -1;
  }
}
module.exports = argv;