unzip.ts

import fs from 'fs-extra'
import path from 'path'
import shell from 'shelljs'
import yauzl from 'yauzl'

export async function unzip(zippedData: Buffer, destPath: string) {
  await fs.ensureDir(destPath)
  return new Promise((resolve, reject) => {
    yauzl.fromBuffer(zippedData, { lazyEntries: true }, (err, zipfile) => {
      if (err) {
        reject(err)
      } else if (zipfile == null) {
        reject(new Error('zipFile is null or undefined'))
      } else {
        zipfile.readEntry()
        zipfile.on('end', () => resolve())
        zipfile.on('entry', entry => {
          if (/\$/.test(entry.fileName)) {
            // Current entry is an empty directory
            shell.mkdir('-p', path.join(destPath, entry.fileName))
            zipfile.readEntry()
          } else {
            // Current entry is a file
            shell.mkdir('-p', path.join(destPath, path.dirname(entry.fileName)))
            const ws = fs.createWriteStream(path.join(destPath, entry.fileName))
            zipfile.openReadStream(entry, (error, rs) => {
              if (error) {
                reject(error)
              } else if (rs == null) {
                reject(new Error('rs is null or undefined'))
              } else {
                rs.pipe(ws)
                rs.on('end', () => zipfile.readEntry())
              }
            })
          }
        })
      }
    })
  })
}