From c62c5544fa23378843a3383a9dcd4494e5ea33bc Mon Sep 17 00:00:00 2001
From: Runxi Yu
Date: Fri, 6 Mar 2026 11:54:21 +0800
Subject: format/commitgraph: Split into ./read and ./

---
 format/commitgraph/layer_open.go | 80 ----------------------------------------
 1 file changed, 80 deletions(-)
 delete mode 100644 format/commitgraph/layer_open.go

(limited to 'format/commitgraph/layer_open.go')

diff --git a/format/commitgraph/layer_open.go b/format/commitgraph/layer_open.go
deleted file mode 100644
index 857b3022..00000000
--- a/format/commitgraph/layer_open.go
+++ /dev/null
@@ -1,80 +0,0 @@
-package commitgraph
-
-import (
-	"os"
-	"syscall"
-
-	"codeberg.org/lindenii/furgit/internal/intconv"
-	"codeberg.org/lindenii/furgit/objectid"
-)
-
-func openLayer(root *os.Root, relPath string, algo objectid.Algorithm) (*layer, error) {
-	file, err := root.Open(relPath)
-	if err != nil {
-		return nil, err
-	}
-
-	info, err := file.Stat()
-	if err != nil {
-		_ = file.Close()
-
-		return nil, err
-	}
-
-	size := info.Size()
-	if size < int64(headerSize+fanoutSize+algo.Size()) {
-		_ = file.Close()
-
-		return nil, &ErrMalformed{Path: relPath, Reason: "file too short"}
-	}
-
-	mapLen, err := intconv.Int64ToUint64(size)
-	if err != nil {
-		_ = file.Close()
-
-		return nil, err
-	}
-
-	mapLenInt, err := intconv.Uint64ToInt(mapLen)
-	if err != nil {
-		_ = file.Close()
-
-		return nil, err
-	}
-
-	fd, err := intconv.UintptrToInt(file.Fd())
-	if err != nil {
-		_ = file.Close()
-
-		return nil, err
-	}
-
-	data, err := syscall.Mmap(fd, 0, mapLenInt, syscall.PROT_READ, syscall.MAP_PRIVATE)
-	if err != nil {
-		_ = file.Close()
-
-		return nil, err
-	}
-
-	out := &layer{
-		path: relPath,
-		file: file,
-		data: data,
-	}
-
-	parseErr := parseLayer(out, algo)
-	if parseErr != nil {
-		_ = out.close()
-
-		return nil, parseErr
-	}
-
-	verifyErr := verifyTrailerHash(out.data, algo, relPath)
-	if verifyErr != nil {
-		_ = out.close()
-
-		return nil, verifyErr
-	}
-
-	return out, nil
-}
-- 
cgit v1.3.1-10-gc9f91