fsu - File Update utility

Installation

npm install @web-stack/fsu

Usage

const fsu = require('@web-stack/fsu');

fsu.update(patterns, (content) => {
  // Manke changes to content
  return content;
});

API

update(patterns, modifier)

Updates the file by applying the modifications to content and writes back to same path. It accepts glob pattern to modify multiple files in one command.

Returns: Promise

patterns

Type: string | string[]

See supported minimatch patterns.

modifier

Type: function

Parameters:

• content: Contents of file as string

Returns: string

Modifier function has one argument passed - contents of the file. This function should return the modified contents as string.

updateSync(patterns, modifier)

This is synchronous variant of update().

Example

This utility can covert

const files = globby.sync(path.join(__dirname, 'config*.js'));

files.forEach(file => {
  let cnt = fs.readFileSync(file, 'utf8');
  cnt = cnt.replace('"${ENV}"', 'prod');
  fs.writeFileSync(file, cnt, 'utf8');
});

to

fsu.updateSync(path.join(__dirname, 'config*.js'), c => c.replace('${ENV}', 'prod'));