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package repository_test
import (
"codeberg.org/lindenii/furgit/object"
"codeberg.org/lindenii/furgit/objectid"
"codeberg.org/lindenii/furgit/repository"
)
type treeWalkFrame struct {
id objectid.ObjectID
isTree bool
}
func traverseTreeIter(repo *repository.Repository, root objectid.ObjectID) (int, error) {
stack := []treeWalkFrame{{id: root, isTree: true}}
total := 0
for len(stack) > 0 {
frame := stack[len(stack)-1]
stack = stack[:len(stack)-1]
id := frame.id
if !frame.isTree {
_, err := repo.Objects().ReadSize(id)
if err != nil {
return 0, err
}
total++
continue
}
tree, err := repo.ReadStoredTree(id)
if err != nil {
return 0, err
}
total++
for i := len(tree.Tree().Entries) - 1; i >= 0; i-- {
entry := tree.Tree().Entries[i]
if entry.Mode == object.FileModeGitlink {
continue
}
stack = append(stack, treeWalkFrame{
id: entry.ID,
isTree: entry.Mode == object.FileModeDir,
})
}
}
return total, nil
}
func traverseReachableIter(repo *repository.Repository, root objectid.ObjectID) (int, error) {
stack := []objectid.ObjectID{root}
visited := make(map[objectid.ObjectID]struct{})
total := 0
for len(stack) > 0 {
id := stack[len(stack)-1]
stack = stack[:len(stack)-1]
_, ok := visited[id]
if ok {
continue
}
visited[id] = struct{}{}
stored, err := repo.ReadStored(id)
if err != nil {
return 0, err
}
total++
switch obj := stored.Object().(type) {
case *object.Commit:
stack = append(stack, obj.Tree)
stack = append(stack, obj.Parents...)
case *object.Tree:
for i := len(obj.Entries) - 1; i >= 0; i-- {
entry := obj.Entries[i]
if entry.Mode == object.FileModeGitlink {
continue
}
stack = append(stack, entry.ID)
}
case *object.Tag:
stack = append(stack, obj.Target)
case *object.Blob:
default:
// Unknown parsed object variants are treated as leaves.
}
}
return total, nil
}
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