Better debugging messages

dir.go

@@ -26,6 +26,7 @@ import (
 	"bazil.org/fuse"
 	"bazil.org/fuse/fs"
 	"golang.org/x/net/context"
+	"log"
 )
 
 type versionedDir struct {
@@ -44,27 +45,31 @@ func newVersionedDir(node *versionedNode, inode uint64) *versionedDir {
 }
 
 func (this versionedDir) Attr(attr *fuse.Attr) {
+	log.Printf("versionedDir::Attr: %s", this.node)
+
 	attr.Mode = this.node.info.Mode()
 	attr.Inode = this.inode
 }
 
 func (this versionedDir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
-	var entries []fuse.Dirent
+	log.Printf("versionedDir::ReadDirAll: %s", this.node)
 
+	var entries []fuse.Dirent
 	for name, dir := range this.dirs {
 		entry := fuse.Dirent{Inode: dir.inode, Name: name, Type: fuse.DT_File}
 		entries = append(entries, entry)
 	}
-
 	for name, file := range this.files {
 		entry := fuse.Dirent{Inode: file.inode, Name: name, Type: fuse.DT_Dir}
 		entries = append(entries, entry)
 	}
 
-	return nil, nil
+	return entries, nil
 }
 
 func (this versionedDir) Lookup(ctx context.Context, name string) (fs.Node, error) {
+	log.Printf("versionedDir::Lookup: %s", this.node)
+
 	if dir, ok := this.dirs[name]; ok {
 		return dir, nil
 	}

file.go

@@ -26,6 +26,7 @@ import (
 	"bazil.org/fuse"
 	"golang.org/x/net/context"
 	"io/ioutil"
+	"log"
 )
 
 type versionedFile struct {
@@ -38,12 +39,16 @@ func newVersionedFile(node *versionedNode, inode uint64) *versionedFile {
 }
 
 func (this versionedFile) Attr(attr *fuse.Attr) {
+	log.Printf("versionedFile::Attr: %s", this.node)
+
 	attr.Mode = this.node.info.Mode()
 	attr.Inode = this.inode
 	attr.Size = uint64(this.node.info.Size())
 }
 
 func (this versionedFile) ReadAll(ctx context.Context) ([]byte, error) {
+	log.Printf("versionedFile::ReadAll: %s", this.node)
+
 	bytes, err := ioutil.ReadFile(this.node.rebasedPath())
 	if err != nil {
 		return nil, err

fs/vfs_0/root/test_file

@@ -0,0 +1 @@
+Hello world

fs/vfs_2/root/test_file

@@ -0,0 +1 @@
+Blahblahblah

node.go

@@ -22,7 +22,10 @@
 
 package main
 
-import "os"
+import (
+	"fmt"
+	"os"
+)
 
 type versionedNode struct {
 	path string
@@ -35,3 +38,7 @@ type versionedNodeMap map[string]*versionedNode
 func (this *versionedNode) rebasedPath() string {
 	return this.ver.rebasePath(this.path)
 }
+
+func (this *versionedNode) String() string {
+	return fmt.Sprintf("%s (%s)", this.path, this.rebasedPath())
+}

vfs.go

@@ -36,10 +36,10 @@ func main() {
 
 	c, err := fuse.Mount(
 		"mp",
-		fuse.FSName("helloworld"),
-		fuse.Subtype("hellofs"),
+		fuse.FSName("vfs"),
+		fuse.Subtype("vfs"),
 		fuse.LocalVolume(),
-		fuse.VolumeName("Hello world!"),
+		fuse.VolumeName("vfs"),
 	)
 	if err != nil {
 		log.Fatal(err)