re-prefix.js

'strict mode'

const fs = require('fs')
const path = require('path')

/**
 * Re-prefix utility
 *
 * Usage: re-prefix [ dir ] [ prefix ] [ new_prefix ]
 * E.g. re-prefix ./icons soc- social-icon-
 */

var dir
var prefix
var newPrefix

init()

function init() {
  if (process.argv.length < 5) { return showUsage() }

  dir = process.argv[2]
  prefix = process.argv[3]
  newPrefix = process.argv[4]

  renameFiles()
}

function renameFiles() {
  var files = fs.readdirSync(dir)
  var count = 0

  files
  .filter(filename => {
    return filename.substr(0, prefix.length) === prefix
  })
  .map(filename => {
    var oldPath = path.resolve(dir, filename)
    var newFilename = newPrefix + filename.substr(prefix.length)
    var newPath = path.resolve(dir, newFilename)

    fs.renameSync(oldPath, newPath)

    count++
  })

  console.log(`Done (${ count }) processed`)
}

function showUsage() {
  console.log('Usage: re-prefix [ dir ] [ prefix ] [ new_prefix ]')
  console.log('E.g. re-prefix ./icons soc- social-icon-')
  process.exit()
}