restic/walk.go

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package restic
import (
"path/filepath"
"github.com/restic/restic/backend"
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"github.com/restic/restic/debug"
)
type WalkTreeJob struct {
Path string
Error error
Node *Node
Tree *Tree
}
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func walkTree(repo TreeLoader, path string, treeID backend.ID, done chan struct{}, jobCh chan<- WalkTreeJob) {
debug.Log("walkTree", "start on %q (%v)", path, treeID.Str())
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t, err := LoadTree(repo, treeID)
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if err != nil {
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select {
case jobCh <- WalkTreeJob{Path: path, Error: err}:
case <-done:
return
}
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return
}
for _, node := range t.Nodes {
p := filepath.Join(path, node.Name)
if node.Type == "dir" {
walkTree(repo, p, *node.Subtree, done, jobCh)
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} else {
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select {
case jobCh <- WalkTreeJob{Path: p, Node: node}:
case <-done:
return
}
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}
}
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select {
case jobCh <- WalkTreeJob{Path: path, Tree: t}:
case <-done:
return
}
debug.Log("walkTree", "done for %q (%v)", path, treeID.Str())
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}
// WalkTree walks the tree specified by id recursively and sends a job for each
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// file and directory it finds. When the channel done is closed, processing
// stops.
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func WalkTree(repo TreeLoader, id backend.ID, done chan struct{}, jobCh chan<- WalkTreeJob) {
debug.Log("WalkTree", "start on %v", id.Str())
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walkTree(repo, "", id, done, jobCh)
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close(jobCh)
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debug.Log("WalkTree", "done")
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}