Update to workbox 3.0 & fix breaking changes

build/workbox.js

@@ -16,17 +16,26 @@ const workboxSWDestMapPath = `${workboxSWDestPath}.map`
 fs.createReadStream(workboxSWSrcPath).pipe(fs.createWriteStream(workboxSWDestPath))
 fs.createReadStream(workboxSWSrcMapPath).pipe(fs.createWriteStream(workboxSWDestMapPath))
 
-const updateUrl = (manifestEntries) => manifestEntries.map((entry) => {
-  if (entry.url.startsWith(buildPrefix)) {
-    const regex = new RegExp(buildPrefix, 'g')
-    entry.url = entry.url.replace(regex, '')
+const updateUrl = (manifestEntries) => {
+  const manifest = manifestEntries.map((entry) => {
+    if (entry.url.startsWith(buildPrefix)) {
+      const regex = new RegExp(buildPrefix, 'g')
+      entry.url = entry.url.replace(regex, '')
+    }
+    return entry
+  })
+  return {
+    manifest,
+    warnings: []
   }
-  return entry
-})
+}
 
 config.manifestTransforms = [updateUrl]
 
-swBuild.injectManifest(config).then(() => {
+swBuild.injectManifest(config).then(({
+  count,
+  size
+}) => {
   const wbSwRegex = /{fileName}/g
   fs.readFile(config.swDest, 'utf8', (err, data) => {
     if (err) {
@@ -34,7 +43,9 @@ swBuild.injectManifest(config).then(() => {
     }
     const swFileContents = data.replace(wbSwRegex, wbFileName)
     fs.writeFile(config.swDest, swFileContents, () => {
-      console.log('Pre-cache Manifest generated.')
+      console.log('Pre-cache Manifest generated.', `Pre-cached ${count} files, totalling ${size} bytes.`)
     })
   })
+}).catch((error) => {
+  console.error(`Something went wrong: ${error}`)
 })