create-new-app/modules/copySafe.js

Easily generate a new React application, optionally with Express & MongoDB.

/*
  This module will either safely copy a file or a directory and all it's contents.
  It uses the `keepOldFileContent` module to ensure no existing data is overwritten.
*/

const fs = require('fs-extra')
const path = require('path')
const keepOldFileContent = require('./keepOldFileContent')

function copySafe({sourcePath, destinationPath, excludedFiles = []}) {
  const stats = fs.statSync(sourcePath)
  const isDirectory = stats.isDirectory()

  // DIRECTORIES
  if (isDirectory) {
    // Create the directory if it doesn't already exist.
    fs.ensureDirSync(destinationPath)

    // Get the contents of the source directory.
    const dirContents = fs.readdirSync(sourcePath)

    // Call this function recursively on the contents of this directory.
    dirContents.forEach(item => {
      copySafe({
        sourcePath: `${sourcePath}/${item}`,
        destinationPath: `${destinationPath}/${item}`,
        excludedFiles,
      })
    })

    // FILES
  } else {
    // Ignore `.DS_Store` and excluded files.
    if (
      sourcePath.endsWith('.DS_Store') ||
      excludedFiles.some(excludedFile => sourcePath.endsWith(excludedFile))
    ) {
      return
    }

    const newFileContents = keepOldFileContent({sourcePath, destinationPath})
    const destinationDir = path.resolve(destinationPath, '..')

    fs.ensureDirSync(destinationDir) // In case the directory for the new file doesn't exist, create it.
    fs.writeFileSync(destinationPath, newFileContents, 'utf8')
  }
}

module.exports = copySafe