mirror of
https://github.com/restic/restic.git
synced 2024-12-24 00:37:28 +00:00
100 lines
1.9 KiB
Go
100 lines
1.9 KiB
Go
|
// FUSE directory tree, for servers that wish to use it with the service loop.
|
||
|
|
||
|
package fs
|
||
|
|
||
|
import (
|
||
|
"os"
|
||
|
pathpkg "path"
|
||
|
"strings"
|
||
|
|
||
|
"golang.org/x/net/context"
|
||
|
)
|
||
|
|
||
|
import (
|
||
|
"bazil.org/fuse"
|
||
|
)
|
||
|
|
||
|
// A Tree implements a basic read-only directory tree for FUSE.
|
||
|
// The Nodes contained in it may still be writable.
|
||
|
type Tree struct {
|
||
|
tree
|
||
|
}
|
||
|
|
||
|
func (t *Tree) Root() (Node, error) {
|
||
|
return &t.tree, nil
|
||
|
}
|
||
|
|
||
|
// Add adds the path to the tree, resolving to the given node.
|
||
|
// If path or a prefix of path has already been added to the tree,
|
||
|
// Add panics.
|
||
|
//
|
||
|
// Add is only safe to call before starting to serve requests.
|
||
|
func (t *Tree) Add(path string, node Node) {
|
||
|
path = pathpkg.Clean("/" + path)[1:]
|
||
|
elems := strings.Split(path, "/")
|
||
|
dir := Node(&t.tree)
|
||
|
for i, elem := range elems {
|
||
|
dt, ok := dir.(*tree)
|
||
|
if !ok {
|
||
|
panic("fuse: Tree.Add for " + strings.Join(elems[:i], "/") + " and " + path)
|
||
|
}
|
||
|
n := dt.lookup(elem)
|
||
|
if n != nil {
|
||
|
if i+1 == len(elems) {
|
||
|
panic("fuse: Tree.Add for " + path + " conflicts with " + elem)
|
||
|
}
|
||
|
dir = n
|
||
|
} else {
|
||
|
if i+1 == len(elems) {
|
||
|
dt.add(elem, node)
|
||
|
} else {
|
||
|
dir = &tree{}
|
||
|
dt.add(elem, dir)
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
type treeDir struct {
|
||
|
name string
|
||
|
node Node
|
||
|
}
|
||
|
|
||
|
type tree struct {
|
||
|
dir []treeDir
|
||
|
}
|
||
|
|
||
|
func (t *tree) lookup(name string) Node {
|
||
|
for _, d := range t.dir {
|
||
|
if d.name == name {
|
||
|
return d.node
|
||
|
}
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
func (t *tree) add(name string, n Node) {
|
||
|
t.dir = append(t.dir, treeDir{name, n})
|
||
|
}
|
||
|
|
||
|
func (t *tree) Attr(ctx context.Context, a *fuse.Attr) error {
|
||
|
a.Mode = os.ModeDir | 0555
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
func (t *tree) Lookup(ctx context.Context, name string) (Node, error) {
|
||
|
n := t.lookup(name)
|
||
|
if n != nil {
|
||
|
return n, nil
|
||
|
}
|
||
|
return nil, fuse.ENOENT
|
||
|
}
|
||
|
|
||
|
func (t *tree) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
|
||
|
var out []fuse.Dirent
|
||
|
for _, d := range t.dir {
|
||
|
out = append(out, fuse.Dirent{Name: d.name})
|
||
|
}
|
||
|
return out, nil
|
||
|
}
|