Добавление автоматического обновления checksums

internal/builtins/checksum.go

@@ -0,0 +1,75 @@
+/*
+ * ALR Updater - Automated updater bot for ALR packages
+ * 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 builtins
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+
+	"go.starlark.net/starlark"
+	"go.starlark.net/starlarkstruct"
+)
+
+func checksumModule() *starlarkstruct.Module {
+	return &starlarkstruct.Module{
+		Name: "checksum",
+		Members: starlark.StringDict{
+			"calculate_sha256": starlark.NewBuiltin("checksum.calculate_sha256", calculateSHA256),
+		},
+	}
+}
+
+func calculateSHA256(thread *starlark.Thread, b *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
+	var url string
+	err := starlark.UnpackArgs("checksum.calculate_sha256", args, kwargs, "url", &url)
+	if err != nil {
+		return nil, err
+	}
+
+	// Создаем HTTP клиент с таймаутом
+	client := &http.Client{
+		Timeout: 5 * time.Minute,
+	}
+
+	// Загружаем файл
+	resp, err := client.Get(url)
+	if err != nil {
+		return nil, fmt.Errorf("failed to download file: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("bad status: %s", resp.Status)
+	}
+
+	// Вычисляем SHA256
+	hasher := sha256.New()
+	_, err = io.Copy(hasher, resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to calculate hash: %w", err)
+	}
+
+	// Возвращаем хеш в виде hex строки
+	hashSum := hex.EncodeToString(hasher.Sum(nil))
+	return starlark.String(hashSum), nil
+}