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-rw-r--r--plumbing/format/idxfile/writer.go11
1 files changed, 10 insertions, 1 deletions
diff --git a/plumbing/format/idxfile/writer.go b/plumbing/format/idxfile/writer.go
index efcdcc6..a22cf16 100644
--- a/plumbing/format/idxfile/writer.go
+++ b/plumbing/format/idxfile/writer.go
@@ -25,6 +25,7 @@ type Writer struct {
offset64 uint32
finished bool
index *MemoryIndex
+ added map[plumbing.Hash]struct{}
}
// Index returns a previously created MemoryIndex or creates a new one if
@@ -45,7 +46,15 @@ func (w *Writer) Add(h plumbing.Hash, pos uint64, crc uint32) {
w.m.Lock()
defer w.m.Unlock()
- w.objects = append(w.objects, Entry{h, crc, pos})
+ if w.added == nil {
+ w.added = make(map[plumbing.Hash]struct{})
+ }
+
+ if _, ok := w.added[h]; !ok {
+ w.added[h] = struct{}{}
+ w.objects = append(w.objects, Entry{h, crc, pos})
+ }
+
}
func (w *Writer) Finished() bool {