update

pkg/go-nfs/example/helloworld/main.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net"
+
+	"github.com/go-git/go-billy/v5"
+	"github.com/go-git/go-billy/v5/memfs"
+
+	nfs "git.kmsign.ru/royalcat/tstor/pkg/go-nfs"
+	"git.kmsign.ru/royalcat/tstor/pkg/go-nfs/helpers"
+	nfshelper "git.kmsign.ru/royalcat/tstor/pkg/go-nfs/helpers"
+)
+
+// ROFS is an intercepter for the filesystem indicating it should
+// be read only. The undelrying billy.Memfs indicates it supports
+// writing, but does not in implement billy.Change to support
+// modification of permissions / modTimes, and as such cannot be
+// used as RW system.
+type ROFS struct {
+	nfs.Filesystem
+}
+
+// Capabilities exports the filesystem as readonly
+func (ROFS) Capabilities() billy.Capability {
+	return billy.ReadCapability | billy.SeekCapability
+}
+
+func main() {
+	ctx := context.Background()
+
+	listener, err := net.Listen("tcp", ":0")
+	if err != nil {
+		fmt.Printf("Failed to listen: %v\n", err)
+		return
+	}
+	fmt.Printf("Server running at %s\n", listener.Addr())
+
+	mem := helpers.WrapBillyFS(memfs.New())
+	f, err := mem.Create(ctx, "hello.txt")
+	if err != nil {
+		fmt.Printf("Failed to create file: %v\n", err)
+		return
+	}
+	_, _ = f.Write(ctx, []byte("hello world"))
+	_ = f.Close(ctx)
+
+	handler := nfshelper.NewNullAuthHandler(ROFS{mem})
+	cacheHelper := nfshelper.NewCachingHandler(handler, 1024)
+	fmt.Printf("%v", nfs.Serve(listener, cacheHelper))
+}