prepend-directive/index.js

Prepend a directive to the top of a file

#!/usr/bin/env node

const fs = require(`fs-extra`);
const path = require(`path`);

const args = process.argv.slice(2);

let directive;
let files = [];
let cwd = process.cwd();

for (const arg of args) {
  const [key, value] = arg.split(`=`);

  switch (key) {
    case `--directive`:
      directive = value;
      break;
    case `--files`:
      files = value.split(`,`);
      break;
    case `--cwd`:
      cwd = value;
      break;
  }
}

function prependDirective({ directive, files, cwd = process.cwd() }) {
  for (const file of files) {
    try {
      const filePath = path.resolve(cwd, file);
      const fileContent = fs.readFileSync(filePath).toString();

      fs.writeFileSync(filePath, `"${directive}"\n${fileContent}`);

      console.info(
        `\x1b[32m`,
        `Prepended directive "${directive}" to file ${file}`,
        `\x1b[0m`
      );
    } catch (error) {
      console.error(
        `\x1b[31m`,
        `Failed to prepend directive "${directive}" to file "${file}"\n`,
        `\x1b[0m`,
        error
      );
      break;
    }
  }
}

prependDirective({ directive, files, cwd });

module.exports = prependDirective;