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// Package packed provides packfile reading and associated indexes.
package packed
import (
"os"
"sync"
"codeberg.org/lindenii/furgit/objectid"
"codeberg.org/lindenii/furgit/objectstore"
)
// Store reads Git objects from pack/index files under an objects/pack root.
//
// Store owns root and closes it in Close.
type Store struct {
// root is the objects/pack capability used for all file access.
root *os.Root
// algo is the expected object ID algorithm for lookups.
algo objectid.Algorithm
// discoverOnce guards one-time pack candidate discovery.
discoverOnce sync.Once
// discoverErr stores candidate discovery failures.
discoverErr error
// candidateHead is the first candidate in lookup priority order.
candidateHead *packCandidateNode
// candidateTail is the last candidate in lookup priority order.
candidateTail *packCandidateNode
// candidateByPack maps pack basename to discovered candidate.
candidateByPack map[string]packCandidate
// candidateNodeByPack maps pack basename to linked-list node.
candidateNodeByPack map[string]*packCandidateNode
// idxByPack caches opened and parsed indexes by pack basename.
idxByPack map[string]*idxFile
// stateMu guards pack cache and close state.
stateMu sync.RWMutex
// candidatesMu guards discovered candidates and MRU order.
candidatesMu sync.RWMutex
// idxMu guards parsed index cache.
idxMu sync.RWMutex
// cacheMu guards delta cache operations.
cacheMu sync.RWMutex
// packs caches opened .pack handles by basename.
packs map[string]*packFile
// deltaCache caches resolved base objects by pack location.
deltaCache *deltaCache
// closed reports whether Close has been called.
closed bool
}
var _ objectstore.Store = (*Store)(nil)
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