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Use multiple initrds to reduce rebuilds

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This commit is contained in:
Graham Christensen 2020-06-07 22:05:04 -04:00
parent 4bd4603382
commit 8441f4372d
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1 changed files with 21 additions and 52 deletions
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73
quickly.nix
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@ -9,18 +9,6 @@ let
in
{
options = {
netboot.storeContents = mkOption {
example = literalExample "[ pkgs.stdenv ]";
description = ''
This option lists additional derivations to be included in the
Nix store in the generated netboot image.
'';
};
};
config = {
# Don't build the GRUB menu builder script, since we don't need it
# here and it causes a cyclic dependency.
@ -77,56 +65,37 @@ in
boot.initrd.availableKernelModules = [ "squashfs" "overlay" ];
boot.initrd.kernelModules = [ "loop" "overlay" ];
# Closures to be copied to the Nix store, namely the init
# script and the top-level system configuration directory.
netboot.storeContents =
[ config.system.build.toplevel ];
# Create the squashfs image that contains the Nix store.
system.build.squashfsStore = netbootpkgs.makeSquashfsManifest {
name = "iso-manifeiist";
storeContents = config.netboot.storeContents;
name = "iso-manifest";
storeContents = config.system.build.toplevel;
};
# Create the initrd
system.build.netbootRamdisk = pkgs.makeInitrd {
inherit (config.boot.initrd) compressor;
prepend = [
"${config.system.build.initialRamdisk}/initrd"
"${(
system.build.ipxeBootDir = netbootpkgs.makePxeScript {
inherit config pkgs;
initrds = {
initrd = "${config.system.build.initialRamdisk}/initrd";
squashes = "${(
netbootpkgs.makeCpioRecursive {
name = "better-initrd";
inherit (config.boot.initrd) compressor;
root = config.system.build.squashfsStore;
}
)}/initrd"
];
contents =
[
{
object = pkgs.runCommand "nix-store-isos-reversed" {} ''
${pkgs.utillinux}/bin/rev ${config.system.build.squashfsStore} > $out
'';
symlink = "/nix-store-isos";
}
];
};
system.build.netbootIpxeScript = pkgs.writeTextDir "netboot.ipxe" ''
#!ipxe
kernel ${pkgs.stdenv.hostPlatform.platform.kernelTarget} init=${config.system.build.toplevel}/init initrd=initrd ${toString config.boot.kernelParams}
initrd initrd
boot
'';
system.build.ipxeBootDir = pkgs.symlinkJoin {
name = "ipxeBootDir";
paths = [
config.system.build.netbootRamdisk
config.system.build.kernel
config.system.build.netbootIpxeScript
];
)}/initrd";
squashmanifest = "${pkgs.makeInitrd {
inherit (config.boot.initrd) compressor;
contents =
[
{
object = pkgs.runCommand "nix-store-isos-reversed" {} ''
${pkgs.utillinux}/bin/rev ${config.system.build.squashfsStore} > $out
'';
symlink = "/nix-store-isos";
}
];
}}/initrd";
};
};
boot.loader.timeout = 10;