1 files changed, 0 insertions, 133 deletions
diff --git a/format/commitgraph/open_chain.go b/format/commitgraph/open_chain.go
deleted file mode 100644
index 212a4049..00000000
--- a/format/commitgraph/open_chain.go
+++ /dev/null
@@ -1,133 +0,0 @@
-package commitgraph
-
-import (
-	"bufio"
-	"errors"
-	"fmt"
-	"os"
-	"strings"
-
-	"codeberg.org/lindenii/furgit/internal/intconv"
-	"codeberg.org/lindenii/furgit/objectid"
-)
-
-func openChain(root *os.Root, algo objectid.Algorithm) (*Reader, error) {
-	chainPath := "info/commit-graphs/commit-graph-chain"
-
-	file, err := root.Open(chainPath)
-	if err != nil {
-		if errors.Is(err, os.ErrNotExist) {
-			return nil, &ErrMalformed{Path: chainPath, Reason: "missing commit-graph-chain"}
-		}
-
-		return nil, err
-	}
-
-	scanner := bufio.NewScanner(file)
-	hashes := make([]string, 0)
-
-	for scanner.Scan() {
-		line := strings.TrimSpace(scanner.Text())
-		if line == "" {
-			continue
-		}
-
-		hashes = append(hashes, line)
-	}
-
-	scanErr := scanner.Err()
-	closeErr := file.Close()
-
-	if scanErr != nil {
-		return nil, scanErr
-	}
-
-	if closeErr != nil {
-		return nil, closeErr
-	}
-
-	if len(hashes) == 0 {
-		return nil, &ErrMalformed{Path: chainPath, Reason: "empty chain"}
-	}
-
-	layers := make([]layer, 0, len(hashes))
-
-	var total uint32
-
-	hashVersion, err := intconv.Uint32ToUint8(algo.PackHashID())
-	if err != nil {
-		return nil, err
-	}
-
-	for i, hashHex := range hashes {
-		expectedBaseCount, err := intconv.IntToUint32(i)
-		if err != nil {
-			closeLayers(layers)
-
-			return nil, err
-		}
-
-		if len(hashHex) != algo.HexLen() {
-			closeLayers(layers)
-
-			return nil, &ErrMalformed{
-				Path:   chainPath,
-				Reason: fmt.Sprintf("invalid graph hash length at line %d", i+1),
-			}
-		}
-
-		relPath := fmt.Sprintf("info/commit-graphs/graph-%s.graph", hashHex)
-
-		loaded, loadErr := openLayer(root, relPath, algo)
-		if loadErr != nil {
-			closeLayers(layers)
-
-			return nil, loadErr
-		}
-
-		if loaded.baseCount != expectedBaseCount {
-			_ = loaded.close()
-
-			closeLayers(layers)
-
-			return nil, &ErrMalformed{
-				Path:   relPath,
-				Reason: fmt.Sprintf("BASE count %d does not match chain depth %d", loaded.baseCount, i),
-			}
-		}
-
-		validateErr := validateChainBaseHashes(algo, hashes, i, loaded)
-		if validateErr != nil {
-			_ = loaded.close()
-
-			closeLayers(layers)
-
-			return nil, validateErr
-		}
-
-		loaded.globalFrom = total
-		loaded.baseCount = expectedBaseCount
-
-		totalNext := total + loaded.numCommits
-		if totalNext < total {
-			_ = loaded.close()
-
-			closeLayers(layers)
-
-			return nil, &ErrMalformed{Path: relPath, Reason: "total commit count overflow"}
-		}
-
-		total = totalNext
-
-		layers = append(layers, *loaded)
-	}
-
-	out := &Reader{
-		algo:        algo,
-		hashVersion: hashVersion,
-		layers:      layers,
-		total:       total,
-	}
-
-	return out, nil
-}