feat: use integraty file to invalidate icon cache

lib/icon/module.js

@@ -3,6 +3,7 @@ const { fork } = require('child_process')
 const fs = require('fs-extra')
 const hasha = require('hasha')
 const { joinUrl, getRouteParams, sizeName } = require('../utils')
+const { version } = require('../../package.json')
 
 module.exports = function (pwa) {
   this.nuxt.hook('build:before', () => run.call(this, pwa, true))
@@ -198,25 +199,30 @@ function emitAssets (options) {
 }
 
 async function resizeIcons (options) {
-  if (await fs.exists(options._cacheDir)) {
+  const resizeOpts = JSON.stringify({
+    version,
+    input: options.iconSrc,
+    distDir: options._cacheDir,
+    sizes: [
+      ...options.sizes,
+      ...options.iosSizes
+    ]
+  })
+
+  const integrityFile = path.join(options._cacheDir, '.' + hasha(resizeOpts))
+
+  if (await fs.exists(options.integrityFile)) {
     return
   }
 
   await fs.mkdirp(options._cacheDir)
 
   await new Promise((resolve, reject) => {
-    const child = fork(require.resolve('./resize'), [
-      JSON.stringify({
-        input: options.iconSrc,
-        distDir: options._cacheDir,
-        sizes: [
-          ...options.sizes,
-          ...options.iosSizes
-        ]
-      })
-    ])
+    const child = fork(require.resolve('./resize'), [resizeOpts])
     child.on('exit', (code) => {
       return code ? reject(code) : resolve()
     })
   })
+
+  await fs.writeFile(integrityFile, '')
 }