feat: add checksum for git downloader

pkg/dl/utils.go

@@ -0,0 +1,55 @@
+// ALR - Any Linux Repository
+// Copyright (C) 2025 The ALR Authors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package dl
+
+import (
+	"hash"
+	"io"
+	"os"
+	"path/filepath"
+)
+
+func HashDir(dirPath string, h hash.Hash) error {
+	err := filepath.Walk(dirPath, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		// Skip .git directory
+		if info.IsDir() && info.Name() == ".git" {
+			return filepath.SkipDir
+		}
+		// Skip directories (only process files)
+		if !info.Mode().IsRegular() {
+			return nil
+		}
+		// Open file
+		f, err := os.Open(path)
+		if err != nil {
+			return err
+		}
+		defer f.Close()
+		// Write file content to hasher
+		if _, err := io.Copy(h, f); err != nil {
+			return err
+		}
+		return nil
+	})
+	if err != nil {
+		return err
+	}
+	return nil
+}