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prune.go
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prune.go
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package git
import (
"errors"
"time"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/storer"
)
type PruneHandler func(unreferencedObjectHash plumbing.Hash) error
type PruneOptions struct {
// OnlyObjectsOlderThan if set to non-zero value
// selects only objects older than the time provided.
OnlyObjectsOlderThan time.Time
// Handler is called on matching objects
Handler PruneHandler
}
var ErrLooseObjectsNotSupported = errors.New("loose objects not supported")
// DeleteObject deletes an object from a repository.
// The type conveniently matches PruneHandler.
func (r *Repository) DeleteObject(hash plumbing.Hash) error {
los, ok := r.Storer.(storer.LooseObjectStorer)
if !ok {
return ErrLooseObjectsNotSupported
}
return los.DeleteLooseObject(hash)
}
func (r *Repository) Prune(opt PruneOptions) error {
los, ok := r.Storer.(storer.LooseObjectStorer)
if !ok {
return ErrLooseObjectsNotSupported
}
pw := newObjectWalker(r.Storer)
err := pw.walkAllRefs()
if err != nil {
return err
}
// Now walk all (loose) objects in storage.
return los.ForEachObjectHash(func(hash plumbing.Hash) error {
// Get out if we have seen this object.
if pw.isSeen(hash) {
return nil
}
// Otherwise it is a candidate for pruning.
// Check out for too new objects next.
if !opt.OnlyObjectsOlderThan.IsZero() {
// Errors here are non-fatal. The object may be e.g. packed.
// Or concurrently deleted. Skip such objects.
t, err := los.LooseObjectTime(hash)
if err != nil {
return nil
}
// Skip too new objects.
if !t.Before(opt.OnlyObjectsOlderThan) {
return nil
}
}
return opt.Handler(hash)
})
}