Several modifications

- Get the service worker file from entry asset's dir
- Upgrade to use 5.1.2 workbox, using importScripts

package.json

@@ -1,15 +1,15 @@
 {
   "name": "parcel-plugin-workbox-precache",
-  "version": "0.0.6",
+  "version": "0.1.6",
   "main": "src/index.js",
   "author": "Jos van Bakel <jos.van.bakel@wearespindle.com>",
   "contributors": [
-    "Jos van Bakel <jos.van.bakel@wearespindle.com>"
+    "Jos van Bakel <jos.van.bakel@wearespindle.com>",
+    "Viktor Nagy <viktor.nagy@gmail.com>"
   ],
   "license": "MIT",
   "repository": "https://github.com/wearespindle/parcel-plugin-workbox-precache",
   "peerDependencies": {
-    "parcel-bundler": "^1.12.0",
-    "workbox-build": "^4.1.0"
+    "parcel-bundler": "^1.12.0"
   }
 }

src/helpers/buildServiceWorker.js

@@ -1,7 +1,6 @@
 const fs = require('fs');
 const path = require('path');
 const { promisify } = require('util');
-const workbox = require('workbox-build');
 
 const computeBundleHashes = require('./computeBundleHashes.js');
 const injectScript = require('./injectScript.js');
@@ -11,8 +10,10 @@ const writeFile = promisify(fs.writeFile);
 
 module.exports = async function upgradeServiceWorker(bundle, swFilename, precacheFilter) {
   const outDir = path.resolve(bundle.entryAsset.options.outDir);
-  const swFile = path.join(outDir, swFilename);
-  if (!fs.existsSync(swFile)) {
+  const baseDir = path.resolve(path.dirname(bundle.entryAsset.name));
+  const inFile = path.join(baseDir, swFilename);
+  const outFile = path.join(outDir, swFilename);
+  if (!fs.existsSync(inFile)) {
     console.log(`Skipping workbox precache because ${swFilename} is not found.`);
     return;
   }
@@ -28,11 +29,10 @@ module.exports = async function upgradeServiceWorker(bundle, swFilename, precach
   console.log(`Copied workbox libraries to ${workboxLibDir}`);
 
   const script = `
-importScripts('${workboxLibDir}/workbox-sw.js');
-workbox.setConfig({modulePathPrefix: '/${workboxLibDir}/'});
+importScripts('https://storage.googleapis.com/workbox-cdn/releases/5.1.2/workbox-sw.js');
 const precacheManifest = ${JSON.stringify(precacheManifest, null, 2)};
 `;
 
-  const contents = await readFile(swFile, { encoding: 'utf8' });
-  await writeFile(swFile, injectScript(contents, script));
+  const contents = await readFile(inFile, { encoding: 'utf8' });
+  await writeFile(outFile, injectScript(contents, script));
 };