build: Add build process for newgui (#7351)

.gitignore

@@ -18,3 +18,4 @@ deb
 *.bz2
 /repos
 /proto/scripts/protoc-gen-gosyncthing
+/gui/next-gen-gui

build.go

@@ -51,6 +51,7 @@ var (
 	coverage       bool
 	timeout        = "120s"
 	numVersions    = 5
+	withNextGenGUI = os.Getenv("BUILD_NEXT_GEN_GUI") != ""
 )
 
 type target struct {
@@ -372,6 +373,7 @@ func parseFlags() {
 	flag.IntVar(&numVersions, "num-versions", numVersions, "Number of versions for changelog command")
 	flag.StringVar(&run, "run", "", "Specify which tests to run")
 	flag.StringVar(&benchRun, "bench", "", "Specify which benchmarks to run")
+	flag.BoolVar(&withNextGenGUI, "with-next-gen-gui", withNextGenGUI, "Also build 'newgui'")
 	flag.Parse()
 }
 
@@ -438,6 +440,10 @@ func benchArgs() []string {
 }
 
 func install(target target, tags []string) {
+	if (target.name == "syncthing" || target.name == "") && !withNextGenGUI {
+		log.Println("Notice: Next generation GUI will not be built; see --with-next-gen-gui.")
+	}
+
 	lazyRebuildAssets()
 
 	tags = append(target.tags, tags...)
@@ -467,6 +473,10 @@ func install(target target, tags []string) {
 }
 
 func build(target target, tags []string) {
+	if (target.name == "syncthing" || target.name == "") && !withNextGenGUI {
+		log.Println("Notice: Next generation GUI will not be built; see --with-next-gen-gui.")
+	}
+
 	lazyRebuildAssets()
 	tags = append(target.tags, tags...)
 
@@ -764,11 +774,46 @@ func rebuildAssets() {
 }
 
 func lazyRebuildAssets() {
-	if shouldRebuildAssets("lib/api/auto/gui.files.go", "gui") || shouldRebuildAssets("cmd/strelaypoolsrv/auto/gui.files.go", "cmd/strelaypoolsrv/gui") {
+	shouldRebuild := shouldRebuildAssets("lib/api/auto/gui.files.go", "gui") ||
+		shouldRebuildAssets("cmd/strelaypoolsrv/auto/gui.files.go", "cmd/strelaypoolsrv/gui")
+
+	if withNextGenGUI {
+		shouldRebuild = buildNextGenGUI() || shouldRebuild
+	}
+
+	if shouldRebuild {
 		rebuildAssets()
 	}
 }
 
+func buildNextGenGUI() bool {
+	// Check if we need to run the npm process, and if so also set the flag
+	// to rebuild Go assets afterwards. The index.html is regenerated every
+	// time by the build process. This assumes the new GUI ends up in
+	// next-gen-gui/dist/next-gen-gui.
+
+	if !shouldRebuildAssets("gui/next-gen-gui/index.html", "next-gen-gui") {
+		// The GUI is up to date.
+		return false
+	}
+
+	runPrintInDir("next-gen-gui", "npm", "install")
+	runPrintInDir("next-gen-gui", "npm", "run", "build", "--", "--prod", "--subresource-integrity")
+
+	rmr("gui/tech-ui")
+
+	for _, src := range listFiles("next-gen-gui/dist") {
+		rel, _ := filepath.Rel("next-gen-gui/dist", src)
+		dst := filepath.Join("gui", rel)
+		if err := copyFile(src, dst, 0644); err != nil {
+			fmt.Println("copy:", err)
+			os.Exit(1)
+		}
+	}
+
+	return true
+}
+
 func shouldRebuildAssets(target, srcdir string) bool {
 	info, err := os.Stat(target)
 	if err != nil {

next-gen-gui/angular.json

@@ -3,7 +3,7 @@
   "version": 1, 
   "newProjectRoot": "projects",
   "projects": {
-    "tech-ui": {
+    "next-gen-gui": {
       "projectType": "application",
       "schematics": {
         "@schematics/angular:component": {
@@ -17,7 +17,7 @@
         "build": {
           "builder": "@angular-devkit/build-angular:browser",
           "options": {
-            "outputPath": "dist/tech-ui",
+            "outputPath": "dist/next-gen-gui",
             "index": "src/index.html",
             "main": "src/main.ts",
             "polyfills": "src/polyfills.ts",
@@ -66,18 +66,18 @@
         "serve": {
           "builder": "@angular-devkit/build-angular:dev-server",
           "options": {
-            "browserTarget": "tech-ui:build"
+            "browserTarget": "next-gen-gui:build"
           },
           "configurations": {
             "production": {
-              "browserTarget": "tech-ui:build:production"
+              "browserTarget": "next-gen-gui:build:production"
             }
           }
         },
         "extract-i18n": {
           "builder": "@angular-devkit/build-angular:extract-i18n",
           "options": {
-            "browserTarget": "tech-ui:build"
+            "browserTarget": "next-gen-gui:build"
           }
         },
         "test": {
@@ -114,15 +114,15 @@
           "builder": "@angular-devkit/build-angular:protractor",
           "options": {
             "protractorConfig": "e2e/protractor.conf.js",
-            "devServerTarget": "tech-ui:serve"
+            "devServerTarget": "next-gen-gui:serve"
           },
           "configurations": {
             "production": {
-              "devServerTarget": "tech-ui:serve:production"
+              "devServerTarget": "next-gen-gui:serve:production"
             }
           }
         }
       }
     }},
-  "defaultProject": "tech-ui"
+  "defaultProject": "next-gen-gui"
 }

next-gen-gui/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "tech-ui",
+  "name": "next-gen-gui",
   "version": "1.0.0",
   "scripts": {
     "ng": "ng",