[windows] Generate syso file for windows builds

v2/pkg/commands/build/build.go

@@ -2,6 +2,7 @@ package build
 
 import (
 	"fmt"
+	"log"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -121,6 +122,25 @@ func Build(options *Options) (string, error) {
 		return "", err
 	}
 
+	// If we are building for windows, we will need to generate the asset bundle before
+	// compilation. This will be a .syso file in the project root
+	if options.Pack && options.Platform == "windows" {
+		outputLogger.Print("Generating bundle assets: ")
+		err := packageApplication(options)
+		if err != nil {
+			return "", err
+		}
+		outputLogger.Println("Done.")
+
+		// When we finish, we will want to remove the syso file
+		defer func() {
+			err := os.Remove(filepath.Join(options.ProjectData.Path, options.ProjectData.Name+"-res.syso"))
+			if err != nil {
+				log.Fatal(err)
+			}
+		}()
+	}
+
 	// Compile the application
 	outputLogger.Print("Compiling application: ")
 
@@ -178,8 +198,8 @@ func Build(options *Options) (string, error) {
 		}
 	}
 
-	// Do we need to pack the app?
-	if options.Pack {
+	// Do we need to pack the app for non-windows?
+	if options.Pack && options.Platform != "windows" {
 
 		outputLogger.Print("Packaging application: ")
 

v2/pkg/commands/build/packager_windows.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"github.com/leaanthony/winicon"
 	"github.com/wailsapp/wails/v2/internal/fs"
+	"github.com/wailsapp/wails/v2/internal/shell"
 	"github.com/wailsapp/wails/v2/pkg/buildassets"
 	"os"
 	"path/filepath"
@@ -28,7 +29,12 @@ func packageApplication(options *Options) error {
 	if err != nil {
 		return err
 	}
-	// Run
+
+	// Create syso file
+	err = compileResources(options)
+	if err != nil {
+		return err
+	}
 
 	return nil
 }
@@ -76,3 +82,11 @@ func generateIcoFile(options *Options) error {
 	}
 	return nil
 }
+
+func compileResources(options *Options) error {
+	windowsBuildDir := filepath.Join(options.ProjectData.Path, "build", "windows")
+	sourcefile := filepath.Join(options.ProjectData.BuildDir, "windows", options.ProjectData.Name+".rc")
+	targetFile := filepath.Join(options.ProjectData.Path, options.ProjectData.Name+"-res.syso")
+	_, _, err := shell.RunCommand(windowsBuildDir, "windres", "-o", targetFile, sourcefile)
+	return err
+}