Update modified files, store error message

archiver.go

@@ -98,7 +98,7 @@ func (arch *Archiver) SaveFile(node *Node) error {
 	file, err := os.Open(node.path)
 	defer file.Close()
 	if err != nil {
-		return arrar.Annotatef(err, "SaveFile(%v)", node.path)
+		return err
 	}
 
 	// check file again
@@ -245,11 +245,7 @@ func (arch *Archiver) saveTree(t *Tree) (Blob, error) {
 					arch.fileToken <- token
 				}()
 
-				// TODO: handle error
-				err := arch.SaveFile(n)
-				if err != nil {
-					panic(err)
-				}
+				node.err = arch.SaveFile(n)
 				arch.p.Report(Stat{Files: 1})
 			}(node)
 		}
@@ -259,9 +255,19 @@ func (arch *Archiver) saveTree(t *Tree) (Blob, error) {
 
 	// check for invalid file nodes
 	for _, node := range *t {
-		if node.Type == "file" && node.Content == nil {
+		if node.Type == "file" && node.Content == nil && node.err == nil {
 			return Blob{}, fmt.Errorf("node %v has empty content", node.Name)
 		}
+
+		if node.err != nil {
+			err := arch.Error(node.path, nil, node.err)
+			if err != nil {
+				return Blob{}, err
+			}
+
+			// save error message in node
+			node.Error = node.err.Error()
+		}
 	}
 
 	blob, err := arch.SaveJSON(backend.Tree, t)

cmd/restic/cmd_fsck.go

@@ -99,7 +99,7 @@ func fsckTree(opts CmdFsck, ch *restic.ContentHandler, id backend.ID) error {
 
 		switch node.Type {
 		case "file":
-			if node.Content == nil {
+			if node.Content == nil && node.Error == "" {
 				return fmt.Errorf("file node %q of tree %v has no content", node.Name, id)
 			}
 

tree.go

@@ -39,6 +39,8 @@ type Node struct {
 	Content    []backend.ID `json:"content"`
 	Subtree    backend.ID   `json:"subtree,omitempty"`
 
+	Error string `json:"error,omitempty"`
+
 	tree *Tree
 
 	path string
@@ -96,6 +98,7 @@ func LoadTree(ch *ContentHandler, id backend.ID) (Tree, error) {
 
 // LoadTreeRecursive loads the tree and all subtrees via ch.
 func LoadTreeRecursive(path string, ch *ContentHandler, id backend.ID) (Tree, error) {
+	// TODO: load subtrees in parallel
 	tree, err := LoadTree(ch, id)
 	if err != nil {
 		return nil, err