Some work on deleting

database.go

@@ -73,6 +73,12 @@ func (this *database) load(dir string) error {
 }
 
 func (this *database) save() error {
+	for _, ver := range this.vers {
+		if err := ver.finalize(); err != nil {
+			return err
+		}
+	}
+
 	return nil
 }
 

dir.go

@@ -44,16 +44,14 @@ type versionedDir struct {
 }
 
 func newVersionedDir(node *versionedNode, parent *versionedDir) *versionedDir {
-	return &versionedDir{
-		dirs:   make(map[string]*versionedDir),
-		files:  make(map[string]*versionedFile),
-		node:   node,
-		inode:  allocInode(),
-		parent: parent}
+	dirs := make(map[string]*versionedDir)
+	files := make(map[string]*versionedFile)
+
+	return &versionedDir{dirs, files, node, allocInode(), parent}
 }
 
 func (this *versionedDir) version() error {
-	if this.node.flags&NodeModified == NodeModified {
+	if this.node.versioned {
 		return nil
 	}
 
@@ -69,7 +67,7 @@ func (this *versionedDir) version() error {
 		return err
 	}
 
-	node.flags |= NodeModified
+	node.versioned = true
 	this.node = node
 
 	return nil
@@ -91,8 +89,8 @@ func (this *versionedDir) createDir(name string) (*versionedDir, error) {
 	}
 
 	dir := newVersionedDir(node, this)
-
 	this.dirs[name] = dir
+
 	return dir, nil
 }
 
@@ -114,8 +112,8 @@ func (this *versionedDir) createFile(name string, flags int) (*versionedFile, er
 
 	file := newVersionedFile(node, this)
 	file.handle = handle
-
 	this.files[name] = file
+
 	return file, nil
 }
 
@@ -163,17 +161,18 @@ func (this *versionedDir) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (fs
 	return this.createDir(req.Name)
 }
 
-func (this *versionedDir) Remove(ctx context.Context, req *fuse.RemoveRequest) error {
-	var fullPath string
+func (this *versionedDir) Remove(ctx context.Context, req *fuse.RemoveRequest) (err error) {
 	if req.Dir {
-		fullPath = this.dirs[req.Name].node.rebasedPath()
-		delete(this.dirs, req.Name)
+		if err = this.dirs[req.Name].node.remove(); err == nil {
+			delete(this.dirs, req.Name)
+		}
 	} else {
-		fullPath = this.files[req.Name].node.rebasedPath()
-		delete(this.files, req.Name)
+		if err = this.files[req.Name].node.remove(); err == nil {
+			delete(this.files, req.Name)
+		}
 	}
 
-	return os.Remove(fullPath)
+	return
 }
 
 func (this *versionedDir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {

file.go

@@ -42,10 +42,7 @@ type versionedFile struct {
 }
 
 func newVersionedFile(node *versionedNode, parent *versionedDir) *versionedFile {
-	return &versionedFile{
-		node:   node,
-		inode:  allocInode(),
-		parent: parent}
+	return &versionedFile{node, allocInode(), parent, nil}
 }
 
 func (this *versionedFile) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fs.Handle, error) {

fs/ver_1/meta.json

@@ -1,3 +1 @@
-{
-    "deleted": ["/test_file_2"]
-}
+{"deleted":["/test_file_2"]}

fs/ver_2/meta.json

@@ -1,3 +1 @@
-{
-    "deleted": ["/test_dira"]
-}
+{"deleted":["/test_dira"]}

node.go

@@ -33,17 +33,12 @@ import (
 //	versionedNode
 //
 
-const (
-	NodeModified = 1 << iota
-	NodeDeleted
-)
-
 type versionedNode struct {
-	path   string
-	info   os.FileInfo
-	ver    *version
-	parent *versionedNode
-	flags  uint
+	path      string
+	info      os.FileInfo
+	ver       *version
+	parent    *versionedNode
+	versioned bool
 }
 
 type versionedNodeMap map[string]*versionedNode
@@ -58,7 +53,18 @@ func newVersionedNode(path string, ver *version, parent *versionedNode) (*versio
 }
 
 func newVersionedNodeStat(path string, ver *version, parent *versionedNode, info os.FileInfo) *versionedNode {
-	return &versionedNode{path, info, ver, parent, 0}
+	return &versionedNode{path, info, ver, parent, false}
+}
+
+func (this *versionedNode) remove() error {
+	if this.versioned {
+		if err := os.Remove(this.rebasedPath()); err != nil {
+			return err
+		}
+	}
+
+	this.ver.removePath(this.path)
+	return nil
 }
 
 func (this *versionedNode) setAttr(req *fuse.SetattrRequest, resp *fuse.SetattrResponse) error {

version.go

@@ -143,6 +143,14 @@ func (this *version) rebasePath(paths ...string) string {
 	return filepath.Join(combined...)
 }
 
+func (this *version) removePath(path string) {
+	this.meta.Deleted = append(this.meta.Deleted, path)
+}
+
+func (this *version) finalize() error {
+	return this.meta.save()
+}
+
 func (this *version) dump(root *versionedDir, depth int) {
 	indent := strings.Repeat("\t", depth)
 	for name, dir := range root.dirs {

vfs.go

@@ -70,4 +70,8 @@ func main() {
 	if err := conn.MountError; err != nil {
 		log.Fatal(err)
 	}
+
+	if err := db.save(); err != nil {
+		log.Fatal(err)
+	}
 }