// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

// Package pkg contains the installer cmd logic.
package pkg

import (
	"os"
	"strconv"
)

// SourceDateEpoch returns parsed value of SOURCE_DATE_EPOCH.
func SourceDateEpoch() (int64, bool, error) {
	epoch, ok := os.LookupEnv("SOURCE_DATE_EPOCH")
	if !ok {
		return 0, false, nil
	}

	epochInt, err := strconv.ParseInt(epoch, 10, 64)
	if err != nil {
		return 0, false, err
	}

	return epochInt, true, nil
}