feat: tar-stream library instead of tar-js (#360)

package.json

@@ -67,7 +67,7 @@
     "isomorphic-ws": "^4.0.1",
     "js-sha3": "^0.8.0",
     "semver": "^7.3.5",
-    "tar-js": "^0.3.0",
+    "tar-stream": "^3.1.6",
     "web-streams-polyfill": "^4.0.0-beta.3",
     "ws": "^8.7.0"
   },
@@ -92,6 +92,7 @@
     "@types/semver": "^7.3.9",
     "@types/sinon": "^10.0.13",
     "@types/sinon-chai": "^3.2.9",
+    "@types/tar-stream": "^3.1.3",
     "@types/ws": "^8.5.3",
     "@typescript-eslint/eslint-plugin": "^5.46.0",
     "@typescript-eslint/parser": "^5.46.0",

src/utils/tar.ts

@@ -1,30 +1,24 @@
-import Tar from 'tar-js'
+import { pack } from 'tar-stream'
 import { Collection } from '../types'
+import { PassThrough } from 'stream'
 
-// this is a workaround type so that we are able to pass in Uint8Arrays
-// as string to `tar.append`
-interface StringLike {
-  readonly length: number
-  charCodeAt: (index: number) => number
-}
-
-// converts a string to utf8 Uint8Array and returns it as a string-like
-// object that `tar.append` accepts as path
-function fixUnicodePath(path: string): StringLike {
-  const codes = new TextEncoder().encode(path)
-
-  return {
-    length: codes.length,
-    charCodeAt: index => codes[index],
-  }
-}
+export function makeTar(data: Collection<Uint8Array>): PassThrough {
+  const tar = pack()
 
-export function makeTar(data: Collection<Uint8Array>): Uint8Array {
-  const tar = new Tar(1)
   for (const entry of data) {
-    const path = fixUnicodePath(entry.path)
-    tar.append(path, entry.data)
+    tar.entry(
+      {
+        name: entry.path,
+      },
+      Buffer.from(entry.data),
+    )
   }
 
-  return tar.out
+  tar.finalize()
+
+  const stream = new PassThrough()
+
+  tar.pipe(stream)
+
+  return stream
 }