Pre commit hook for prettier

pre-commit

#!/usr/bin/env node

const util = require('util');
const exec = util.promisify(require('child_process').exec);

let run = fn => fn();

run(async () => {
  try {
    let { stdout: git_status_output } = await exec('git diff --cached --name-status');

    let file_rows = git_status_output.split("\n")
    
    // Data collection and manipulation
		let files = file_rows.filter(x => x !== '').map( file_row => {
			const [modifier, path] = file_row.split("\t")
      return { modifier, path };
    });

    console.log('files:', files);

    // Side effect/result
    for (let file of files) {
      try {
        let prettier_output = await exec(`prettier --write "${file.path}"`);
        console.log('prettier_output:', prettier_output);
      } catch (error) {
				//in case the file type throws an error
			}
    }

  } catch (error) {
    console.log('error:', error.stack);
    process.exit(1);
  }

  process.exit(1);
});