feat(cli): add support for custom local port in glasskube open (gla…

…sskube#543)

cmd/glasskube/cmd/open.go

@@ -11,6 +11,10 @@ import (
 	"github.com/spf13/cobra"
 )
 
+var (
+	port int32
+)
+
 var openCmd = &cobra.Command{
 	Use:   "open [package-name] [entrypoint]",
 	Short: "Open the Web UI of a package",
@@ -25,7 +29,7 @@ If the package manifest has more than one entrypoint, specify the name of the en
 			entrypointName = args[1]
 		}
 
-		result, err := open.NewOpener().Open(cmd.Context(), pkgName, entrypointName)
+		result, err := open.NewOpener().Open(cmd.Context(), pkgName, entrypointName, port)
 		if err != nil {
 			fmt.Fprintf(os.Stderr, "❌ Could not open package %v: %v\n", pkgName, err)
 			cliutils.ExitWithError()
@@ -70,5 +74,6 @@ If the package manifest has more than one entrypoint, specify the name of the en
 }
 
 func init() {
+	openCmd.Flags().Int32Var(&port, "port", 0, "Custom port for opening the package")
 	RootCmd.AddCommand(openCmd)
 }

internal/web/server.go

@@ -346,7 +346,7 @@ func (s *server) open(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	result, err := open.NewOpener().Open(r.Context(), pkgName, "")
+	result, err := open.NewOpener().Open(r.Context(), pkgName, "", 0)
 	if err != nil {
 		s.respondAlertAndLog(w, err, "Could not open "+pkgName, "danger")
 	} else {

pkg/open/open.go

@@ -35,7 +35,7 @@ func NewOpener() *opener {
 	return &opener{}
 }
 
-func (o *opener) Open(ctx context.Context, packageName string, entrypointName string) (*OpenResult, error) {
+func (o *opener) Open(ctx context.Context, packageName string, entrypointName string, port int32) (*OpenResult, error) {
 	if err := o.initFromContext(ctx); err != nil {
 		return nil, err
 	}
@@ -49,6 +49,10 @@ func (o *opener) Open(ctx context.Context, packageName string, entrypointName st
 		return nil, fmt.Errorf("package has no entrypoint")
 	}
 
+	if port != 0 && len(manifest.Entrypoints) > 1 && entrypointName == "" {
+		return nil, fmt.Errorf("package has more than one entrypoint: %w", err)
+	}
+
 	if entrypointName != "" {
 		exists := false
 		for _, entrypoint := range manifest.Entrypoints {
@@ -67,6 +71,9 @@ func (o *opener) Open(ctx context.Context, packageName string, entrypointName st
 	for _, entrypoint := range manifest.Entrypoints {
 		if entrypointName == "" || entrypoint.Name == entrypointName {
 			e := entrypoint
+			if port != 0 {
+				e.LocalPort = port
+			}
 			readyCh := make(chan struct{})
 			stopCh := make(chan struct{})
 			o.readyCh = append(o.readyCh, readyCh)
@@ -89,6 +96,7 @@ func (o *opener) Open(ctx context.Context, packageName string, entrypointName st
 		}
 	}
 	result.Completion = future.All(futures...)
+
 	return &result, nil
 }