@publint/pack/src/browser/unpack.js

Utilities for packing and unpacking npm packages

import {
  arrayBufferToReadableStream,
  readableStreamToArrayBuffer,
  uint8ArrayToReadableStream,
} from '../shared/buffer-stream.js'
import { getFilesRootDir, parseTar } from '../shared/parse-tar.js'

/** @type {import('../index.d.ts').unpack} */
export async function unpack(tarball) {
  const stream =
    tarball instanceof ReadableStream
      ? tarball
      : tarball instanceof ArrayBuffer
        ? arrayBufferToReadableStream(tarball)
        : uint8ArrayToReadableStream(tarball)
  const buffer = await readableStreamToArrayBuffer(
    // @ts-expect-error not dealing with this issue for now
    stream.pipeThrough(new DecompressionStream('gzip')),
  )
  const files = parseTar(buffer)
  const rootDir = getFilesRootDir(files)
  return { files, rootDir }
}