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path: root/format/packfile/ingest/rewrite_header_trailer.go
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Diffstat (limited to 'format/packfile/ingest/rewrite_header_trailer.go')
-rw-r--r--format/packfile/ingest/rewrite_header_trailer.go89
1 files changed, 0 insertions, 89 deletions
diff --git a/format/packfile/ingest/rewrite_header_trailer.go b/format/packfile/ingest/rewrite_header_trailer.go
deleted file mode 100644
index f1f18a39..00000000
--- a/format/packfile/ingest/rewrite_header_trailer.go
+++ /dev/null
@@ -1,89 +0,0 @@
-package ingest
-
-import (
- "encoding/binary"
- "io"
-
- "codeberg.org/lindenii/furgit/internal/intconv"
- objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-// rewritePackHeaderAndTrailer rewrites object count and trailer hash using ReadAt/WriteAt.
-func rewritePackHeaderAndTrailer(state *ingestState) error {
- var countRaw [4]byte
-
- recordCountUint32, err := intconv.IntToUint32(len(state.records))
- if err != nil {
- return err
- }
-
- binary.BigEndian.PutUint32(countRaw[:], recordCountUint32)
-
- _, err = state.packFile.WriteAt(countRaw[:], 8)
- if err != nil {
- return err
- }
-
- info, err := state.packFile.Stat()
- if err != nil {
- return err
- }
-
- endWithoutTrailer := info.Size()
-
- hashImpl, err := state.algo.New()
- if err != nil {
- return err
- }
-
- var (
- buf [128 << 10]byte
- pos int64
- )
- for pos < endWithoutTrailer {
- want := int64(len(buf))
-
- remaining := endWithoutTrailer - pos
- if remaining < want {
- want = remaining
- }
-
- n, err := state.packFile.ReadAt(buf[:want], pos)
- if err != nil && err != io.EOF {
- return err
- }
-
- if n == 0 {
- return io.ErrUnexpectedEOF
- }
-
- _, _ = hashImpl.Write(buf[:n])
- pos += int64(n)
- }
-
- sum := hashImpl.Sum(nil)
-
- _, err = state.packFile.WriteAt(sum, endWithoutTrailer)
- if err != nil {
- return err
- }
-
- packHash, err := objectid.FromBytes(state.algo, sum)
- if err != nil {
- return err
- }
-
- state.packHash = packHash
- state.objectCountHeader = recordCountUint32
-
- sumLenInt64 := int64(len(sum))
-
- newConsumed, err := intconv.Int64ToUint64(endWithoutTrailer + sumLenInt64)
- if err != nil {
- return err
- }
-
- state.stream.consumed = newConsumed
-
- return nil
-}