Initial support for a serve port flag

cmd/helpers.go

@@ -510,6 +510,8 @@ func InstallRuntime(caller string, projectDir string, projectOptions *ProjectOpt
 // InstallBridge installs the relevant bridge javascript library
 func InstallBridge(projectDir string, projectOptions *ProjectOptions) error {
 	bridgeFileData := mewn.String("../runtime/assets/bridge.js")
+	// Inject the custom serve port
+	bridgeFileData = strings.ReplaceAll(bridgeFileData, "$SERVEPORT$", projectOptions.ServePort)
 	bridgeFileTarget := filepath.Join(projectDir, projectOptions.FrontEnd.Dir, "node_modules", "@wailsapp", "runtime", "init.js")
 	err := fs.CreateFile(bridgeFileTarget, []byte(bridgeFileData))
 	return err
@@ -561,6 +563,10 @@ func ldFlags(po *ProjectOptions, buildMode string) string {
 
 	ldflags += "-X github.com/wailsapp/wails.BuildMode=" + buildMode
 
+	// Inject port if we are using bridge mode
+	if buildMode == BuildModeBridge {
+		ldflags += " -X github.com/wailsapp/wails/lib/renderer/bridge.ServePort=" + po.ServePort
+	}
 	// If we wish to generate typescript
 	if po.typescriptDefsFilename != "" {
 		cwd, err := os.Getwd()

cmd/project.go

@@ -161,6 +161,7 @@ type ProjectOptions struct {
 	CrossCompile           bool
 	Platform               string
 	Architecture           string
+	ServePort              string
 }
 
 // Defaults sets the default project template

cmd/wails/6_serve.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"strconv"
 
 	"github.com/leaanthony/spinner"
 	"github.com/wailsapp/wails/cmd"
@@ -10,6 +11,7 @@ import (
 func init() {
 
 	var forceRebuild = false
+	var servePort = "34115"
 	var verbose = false
 	buildSpinner := spinner.NewSpinner()
 	buildSpinner.SetSpinSpeed(50)
@@ -18,7 +20,8 @@ func init() {
 	initCmd := app.Command("serve", "Run your Wails project in bridge mode").
 		LongDescription(commandDescription).
 		BoolFlag("verbose", "Verbose output", &verbose).
-		BoolFlag("f", "Force rebuild of application components", &forceRebuild)
+		BoolFlag("f", "Force rebuild of application components", &forceRebuild).
+		StringFlag("p", "Port to serve on", &servePort)
 
 	initCmd.Action(func() error {
 
@@ -34,7 +37,6 @@ func init() {
 
 		// Project options
 		projectOptions := &cmd.ProjectOptions{}
-		projectOptions.Verbose = verbose
 
 		// Check we are in project directory
 		// Check project.json loads correctly
@@ -44,6 +46,16 @@ func init() {
 			return err
 		}
 
+		// Set Verbose flag
+		projectOptions.Verbose = verbose
+
+		// Check port
+		port, err := strconv.Atoi(servePort)
+		if err != nil || port <= 0 {
+			return fmt.Errorf("invalid port value: %s", servePort)
+		}
+		projectOptions.ServePort = servePort
+
 		// Save project directory
 		projectDir := fs.Cwd()