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nixos/iso-image: add an option to disable BIOS boot

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This change adds an option to disable legacy BIOS boot support for ISO
images. The implementation uses syslinux package that currently does not
support non-x86 platforms and thus cannot be cross-compiled, e.g. from
AArch64 system.
This commit is contained in:
Ivan Trubach 2023-03-03 02:31:38 +03:00
parent f41a4ab75d
commit e5b072eca1
2 changed files with 16 additions and 6 deletions
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3
nixos/modules/installer/cd-dvd/installation-cd-base.nix
View file

@ -21,6 +21,9 @@ with lib;
# ISO naming.
isoImage.isoName = "${config.isoImage.isoBaseName}-${config.system.nixos.label}-${pkgs.stdenv.hostPlatform.system}.iso";
# BIOS booting
isoImage.makeBiosBootable = true;
# EFI booting
isoImage.makeEfiBootable = true;

19
nixos/modules/installer/cd-dvd/iso-image.nix
View file

@ -535,6 +535,13 @@ in
'';
};
isoImage.makeBiosBootable = mkOption {
default = false;
description = lib.mdDoc ''
Whether the ISO image should be a BIOS-bootable disk.
'';
};
isoImage.makeEfiBootable = mkOption {
default = false;
description = lib.mdDoc ''
@ -693,7 +700,7 @@ in
boot.loader.grub.enable = false;
environment.systemPackages = [ grubPkgs.grub2 grubPkgs.grub2_efi ]
++ optional canx86BiosBoot pkgs.syslinux
++ optional (config.isoImage.makeBiosBootable && canx86BiosBoot) pkgs.syslinux
;
# In stage 1 of the boot, mount the CD as the root FS by label so
@ -744,7 +751,7 @@ in
{ source = pkgs.writeText "version" config.system.nixos.label;
target = "/version.txt";
}
] ++ optionals canx86BiosBoot [
] ++ optionals (config.isoImage.makeBiosBootable && canx86BiosBoot) [
{ source = config.isoImage.splashImage;
target = "/isolinux/background.png";
}
@ -771,7 +778,7 @@ in
{ source = config.isoImage.efiSplashImage;
target = "/EFI/boot/efi-background.png";
}
] ++ optionals (config.boot.loader.grub.memtest86.enable && canx86BiosBoot) [
] ++ optionals (config.boot.loader.grub.memtest86.enable && config.isoImage.makeBiosBootable && canx86BiosBoot) [
{ source = "${pkgs.memtest86plus}/memtest.bin";
target = "/boot/memtest.bin";
}
@ -786,10 +793,10 @@ in
# Create the ISO image.
system.build.isoImage = pkgs.callPackage ../../../lib/make-iso9660-image.nix ({
inherit (config.isoImage) isoName compressImage volumeID contents;
bootable = canx86BiosBoot;
bootable = config.isoImage.makeBiosBootable && canx86BiosBoot;
bootImage = "/isolinux/isolinux.bin";
syslinux = if canx86BiosBoot then pkgs.syslinux else null;
} // optionalAttrs (config.isoImage.makeUsbBootable && canx86BiosBoot) {
syslinux = if config.isoImage.makeBiosBootable && canx86BiosBoot then pkgs.syslinux else null;
} // optionalAttrs (config.isoImage.makeUsbBootable && config.isoImage.makeBiosBootable && canx86BiosBoot) {
usbBootable = true;
isohybridMbrImage = "${pkgs.syslinux}/share/syslinux/isohdpfx.bin";
} // optionalAttrs config.isoImage.makeEfiBootable {