From 73e602a5c2c766caba59948e91c11122653705ec Mon Sep 17 00:00:00 2001
From: Runxi Yu
Date: Tue, 10 Mar 2026 13:30:48 +0800
Subject: commitgraph: Move out of format/

---
 format/commitgraph/read/hash.go | 79 -----------------------------------------
 1 file changed, 79 deletions(-)
 delete mode 100644 format/commitgraph/read/hash.go

(limited to 'format/commitgraph/read/hash.go')

diff --git a/format/commitgraph/read/hash.go b/format/commitgraph/read/hash.go
deleted file mode 100644
index e9543eac..00000000
--- a/format/commitgraph/read/hash.go
+++ /dev/null
@@ -1,79 +0,0 @@
-package read
-
-import (
-	"bytes"
-	"fmt"
-	"io"
-
-	"codeberg.org/lindenii/furgit/objectid"
-)
-
-// HashVersion returns the commit-graph hash version.
-func (reader *Reader) HashVersion() uint8 {
-	return reader.hashVersion
-}
-
-func validateChainBaseHashes(algo objectid.Algorithm, chain []string, idx int, graph *layer) error {
-	if idx == 0 {
-		if len(graph.chunkBaseGraphs) != 0 {
-			return &MalformedError{Path: graph.path, Reason: "unexpected BASE chunk in first graph"}
-		}
-
-		return nil
-	}
-
-	hashSize := algo.Size()
-
-	expectedLen := idx * hashSize
-	if len(graph.chunkBaseGraphs) != expectedLen {
-		return &MalformedError{
-			Path:   graph.path,
-			Reason: fmt.Sprintf("BASE chunk length %d does not match expected %d", len(graph.chunkBaseGraphs), expectedLen),
-		}
-	}
-
-	for i := range idx {
-		start := i * hashSize
-		end := start + hashSize
-
-		baseHash, err := objectid.FromBytes(algo, graph.chunkBaseGraphs[start:end])
-		if err != nil {
-			return err
-		}
-
-		if baseHash.String() != chain[i] {
-			return &MalformedError{
-				Path:   graph.path,
-				Reason: fmt.Sprintf("BASE chunk mismatch at index %d", i),
-			}
-		}
-	}
-
-	return nil
-}
-
-func verifyTrailerHash(data []byte, algo objectid.Algorithm, path string) error {
-	hashSize := algo.Size()
-	if len(data) < hashSize {
-		return &MalformedError{Path: path, Reason: "file too short for trailer"}
-	}
-
-	hashImpl, err := algo.New()
-	if err != nil {
-		return err
-	}
-
-	_, err = io.Copy(hashImpl, bytes.NewReader(data[:len(data)-hashSize]))
-	if err != nil {
-		return err
-	}
-
-	got := hashImpl.Sum(nil)
-
-	want := data[len(data)-hashSize:]
-	if !bytes.Equal(got, want) {
-		return &MalformedError{Path: path, Reason: "trailer hash mismatch"}
-	}
-
-	return nil
-}
-- 
cgit v1.3.1-10-gc9f91