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faecae44fd
This relies on changes in GRUB and other utilities to respect `SOURCE_DATE_EPOCH`. Variable `SOURCE_DATE_EPOCH` is set to the timestamp of the last git commit which makes it deterministic, but still changes for each release/commit. Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
45 lines
1018 B
Go
45 lines
1018 B
Go
// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package pkg
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import (
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"fmt"
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"os"
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"time"
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"github.com/talos-systems/go-cmd/pkg/cmd"
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)
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// CreateISO creates an iso by invoking the `grub-mkrescue` command.
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func CreateISO(iso, dir string) error {
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args := []string{
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"--compress=xz",
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"--output=" + iso,
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dir,
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}
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if epoch, ok, err := SourceDateEpoch(); err != nil {
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return err
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} else if ok {
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// set EFI FAT image serial number
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if err := os.Setenv("GRUB_FAT_SERIAL_NUMBER", fmt.Sprintf("%x", uint32(epoch))); err != nil {
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return err
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}
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args = append(args,
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"--",
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"-volume_date", "all_file_dates", fmt.Sprintf("=%d", epoch),
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"-volume_date", "uuid", time.Unix(epoch, 0).Format("2006010215040500"),
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)
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}
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_, err := cmd.Run("grub-mkrescue", args...)
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if err != nil {
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return fmt.Errorf("failed to create ISO: %w", err)
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}
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return nil
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}
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