96 lines
2.1 KiB
Go
96 lines
2.1 KiB
Go
// ALR - Any Linux Repository
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// Copyright (C) 2025 The ALR Authors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package dl
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import (
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"bytes"
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"encoding/hex"
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"fmt"
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"hash"
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"io"
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"log/slog"
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"os"
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"path/filepath"
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)
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// If the checksum does not match, returns ErrChecksumMismatch
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func VerifyHashFromLocal(path string, opts Options) error {
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if opts.Hash != nil {
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h, err := opts.NewHash()
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if err != nil {
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return err
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}
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err = HashLocal(filepath.Join(opts.Destination, path), h)
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if err != nil {
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return err
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}
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sum := h.Sum(nil)
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slog.Debug("validate checksum", "real", hex.EncodeToString(sum), "expected", hex.EncodeToString(opts.Hash))
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if !bytes.Equal(sum, opts.Hash) {
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return ErrChecksumMismatch
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}
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}
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return nil
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}
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func HashLocal(path string, h hash.Hash) error {
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info, err := os.Stat(path)
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if err != nil {
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return err
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}
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if info.Mode().IsRegular() {
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// Single file
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f, err := os.Open(path)
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if err != nil {
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return err
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}
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defer f.Close()
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_, err = io.Copy(h, f)
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return err
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}
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if info.IsDir() {
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// Walk directory
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return filepath.Walk(path, func(path string, info os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if info.IsDir() && info.Name() == ".git" {
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return filepath.SkipDir
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}
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if !info.Mode().IsRegular() {
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return nil
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}
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f, err := os.Open(path)
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if err != nil {
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return err
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}
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defer f.Close()
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_, err = io.Copy(h, f)
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return err
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})
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}
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return fmt.Errorf("unsupported file type: %s", path)
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}
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