gistfile1.js

const fsx = require("fs-extra");
const glob = require("glob");
const fs = require("fs");
const path = require("path");
const mm = require("minimatch");

const getIgnoredFiles = (path) => {
  const str = fsx.readFileSync(path).toString();
  const lines = str
    .split(/\r?\n/)
    .filter((line) => line.trim() !== "" && !line.startsWith("#"));
  return Array.from(new Set(lines));
};

const generateFileFilter = () => false;
const generateFolderFilter = () => false;
const generateGlobFilter = (globPattern) => return (fileName) => mm(globPattern, fileName);

const generateFilters = (ignoredFiles) =>
  ignoredFiles.map((ignore) => {
    if (glob.hasMagic(ignore)) {
      console.log("found a glob path", ignore);
      return generateGlobFilter(ignore);
    }
    if (ignore.endsWith("/")) {
      console.log("found a folder filter", ignore);
      return generateFolderFilter(ignore);
    }
    if (!fs.existsSync(ignore) && !ignore.includes("*")) {
      console.log("found a file", ignore);
      return generateFileFilter(ignore);
    }
    console.log("not sure what to do with", ignore);
  });

const main = async (copy, to, ignoreFile) => {
  console.log(`${path.resolve(copy)}/${ignoreFile}`);
  const ignoredFiles = getIgnoredFiles(`${path.resolve(copy)}/${ignoreFile}`);
  console.log("ignoreFile", ignoredFiles);
  const filters = generateFilters(ignoredFiles);
  await fsx.copy(
    copy,
    to,
    {
      filter: (copy, to) => {
        if (copy.endsWith(ignoreFile)) {
          return true;
        }
        if (copy.indexOf(copy) > 1) {
          return false;
        }
        return true;
      },
    },
    (err) => {
      if (err) {
        console.log("err", err);
      }
    }
  ); // copies code into node_modules
};

main("initial", "output", ".npmignore");