Takes the output of tsc (Typescript compiler) and marks the files with type errors with the no-check flag

tsc_no_checks.js

#!/usr/bin/env node
const fs = require("fs");
const through = require('through');
const split = require('split');

/**
 * Takes the output of tsc (Typescript compiler) and marks the files with type errors
 * with the no-check flag 
 */
function main() {
  let files = new Set()
  process.stdin
    .pipe(split())
    .pipe(fileswithError())
    .pipe(uniqueFiles())
    .pipe(noCheckFiles())
    .pipe(process.stdout);

  function fileswithError() {
    return through(function (line) {
      if (line.search(/error.*TS/) > -1) {
        let filename = line.split('(')[0]
        //console.log(filename + '!')
        this.emit('data', filename);
      }

    });
  }
  function uniqueFiles() {
    return through(function (filename) {
      if (!files.has(filename)) {
        this.emit('data', filename);
        files.add(filename);
        //console.log(filename + '!')
      }
    });
  }

  function noCheckFiles() {
    return through(function (filename) {
      var data = fs.readFileSync(filename); //read existing contents into data
      var fd = fs.openSync(filename, 'w+');
      var buffer = Buffer.from('//@ts-nocheck \n');

      fs.writeSync(fd, buffer, 0, buffer.length, 0); //write new data
      fs.writeSync(fd, data, 0, data.length, buffer.length); //append old data
      // or fs.appendFile(fd, data);
      fs.close(fd);
      this.emit('data', filename + '\n');

    });
  }

}

main()

Usage: `tsc > ./tsc_no_checks.js
It will modify the original source files