refactor: use Vite official API for building sw.js (#20894)

* fix: fix service worker build

* fix PwaTestIT

* exclude sw.js from manifest

* generate service worker at closeBundle stage

* clean up service worker build config

* generate service worker at different stages depending on mode

* do not use lib mode to allow for minification in es format

* clean up plugin code

* add inlineDynamicImports: true option

* revert some changes to minimize diff

* add exports option for backward compatibility

---------

Co-authored-by: Teppo Kurki <[email protected]>

flow-server/src/main/resources/vite.generated.ts

@@ -106,7 +106,7 @@ function injectManifestToSWPlugin(): rollup.Plugin {
         const { manifestEntries } = await getManifest({
           globDirectory: buildOutputFolder,
           globPatterns: ['**/*'],
-          globIgnores: ['**/*.br', 'pwa-icons/**'],
+          globIgnores: ['**/*.br', 'pwa-icons/**', 'sw.js'],
           manifestTransforms: [rewriteManifestIndexHtmlUrl],
           maximumFileSizeToCacheInBytes: 100 * 1024 * 1024 // 100mb,
         });
@@ -119,7 +119,6 @@ function injectManifestToSWPlugin(): rollup.Plugin {
 
 function buildSWPlugin(opts: { devMode: boolean }): PluginOption {
   let buildConfig: InlineConfig;
-  let buildOutput: rollup.RollupOutput;
   const devMode = opts.devMode;
 
   return {
@@ -136,7 +135,6 @@ function buildSWPlugin(opts: { devMode: boolean }): PluginOption {
           'process.env.NODE_ENV': JSON.stringify(viteConfig.mode),
         },
         build: {
-          write: !devMode,
           minify: viteConfig.build.minify,
           outDir: viteConfig.build.outDir,
           sourcemap: viteConfig.command === 'serve' || viteConfig.build.sourcemap,
@@ -157,12 +155,7 @@ function buildSWPlugin(opts: { devMode: boolean }): PluginOption {
     },
     async buildStart() {
       if (devMode) {
-        buildOutput = await build(buildConfig) as rollup.RollupOutput;
-      }
-    },
-    async load(id) {
-      if (id.endsWith('sw.js')) {
-        return buildOutput.output[0].code;
+        await build(buildConfig);
       }
     },
     async closeBundle() {