Restructured repository

tree.go

@@ -0,0 +1,55 @@
+package khepri
+
+import (
+	"encoding/json"
+	"io"
+	"os"
+	"syscall"
+	"time"
+)
+
+type Tree struct {
+	Nodes []Node `json:"nodes"`
+}
+
+type Node struct {
+	Name       string      `json:"name"`
+	Mode       os.FileMode `json:"mode"`
+	ModTime    time.Time   `json:"mtime"`
+	AccessTime time.Time   `json:"atime"`
+	User       uint32      `json:"user"`
+	Group      uint32      `json:"group"`
+	Content    ID          `json:"content,omitempty"`
+}
+
+func NewTree() *Tree {
+	return &Tree{
+		Nodes: []Node{},
+	}
+}
+
+func (t *Tree) Restore(r io.Reader) error {
+	dec := json.NewDecoder(r)
+	return dec.Decode(t)
+}
+
+func (t *Tree) Save(w io.Writer) error {
+	enc := json.NewEncoder(w)
+	return enc.Encode(t)
+}
+
+func NodeFromFileInfo(fi os.FileInfo) Node {
+	node := Node{
+		Name:    fi.Name(),
+		Mode:    fi.Mode(),
+		ModTime: fi.ModTime(),
+	}
+
+	if stat, ok := fi.Sys().(*syscall.Stat_t); ok {
+		node.User = stat.Uid
+		node.Group = stat.Gid
+		node.AccessTime = time.Unix(stat.Atim.Unix())
+	}
+
+	return node
+}