forked from mirrors/nixpkgs
139 lines
3.9 KiB
Nix
139 lines
3.9 KiB
Nix
{pkgs, config, ...}:
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let
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options = {
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system.build = pkgs.lib.mkOption {
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default = {};
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description = ''
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Attribute set of derivations used to setup the system.
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'';
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};
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nesting.children = pkgs.lib.mkOption {
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default = [];
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description = ''
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Additional configurations to build.
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'';
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};
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system.boot.loader.id = pkgs.lib.mkOption {
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default = "";
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description = ''
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Id string of the used bootloader.
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'';
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};
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system.boot.loader.kernelFile = pkgs.lib.mkOption {
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default = "";
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description = ''
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Name of the kernel file to be passed to the bootloader.
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'';
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};
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};
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# This attribute is responsible for creating boot entries for
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# child configuration. They are only (directly) accessible
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# when the parent configuration is boot default. For example,
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# you can provide an easy way to boot the same configuration
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# as you use, but with another kernel
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# !!! fix this
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children = with pkgs.lib;
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map (childConfig:
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(import ../../../lib/eval-config.nix {
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modules = [
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(recursiveUpdate childConfig {
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boot.loader.grub.device = "";
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# undefined the obsolete name of the previous option.
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boot.grubDevice = pkgs.lib.mkNotdef;
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})
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] ++ attrByPath ["require"] [] childConfig;
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}).config.system.build.toplevel
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) config.nesting.children;
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systemBuilder =
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let
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kernelPath = "${config.boot.kernelPackages.kernel}/" +
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"${config.system.boot.loader.kernelFile}";
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in
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''
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ensureDir $out
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if [ ! -f ${kernelPath} ]; then
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echo "The bootloader cannot find the proper kernel image."
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echo "(Expecting ${kernelPath})"
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false
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fi
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ln -s ${kernelPath} $out/kernel
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if [ -n "$grub" ]; then
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ln -s $grub $out/grub
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fi
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ln -s ${config.system.build.bootStage2} $out/init
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ln -s ${config.system.build.initialRamdisk}/initrd $out/initrd
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ln -s ${config.system.activationScripts.script} $out/activate
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ln -s ${config.system.build.etc}/etc $out/etc
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ln -s ${config.system.path} $out/sw
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ln -s ${config.system.build.upstart} $out/upstart
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echo "$kernelParams" > $out/kernel-params
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echo "$configurationName" > $out/configuration-name
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echo "${toString config.system.build.upstart.interfaceVersion}" > $out/upstart-interface-version
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mkdir $out/fine-tune
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childCount=0;
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for i in $children; do
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childCount=$(( childCount + 1 ));
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ln -s $i $out/fine-tune/child-$childCount;
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done
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ensureDir $out/bin
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substituteAll ${./switch-to-configuration.sh} $out/bin/switch-to-configuration
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chmod +x $out/bin/switch-to-configuration
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'';
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# Putting it all together. This builds a store path containing
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# symlinks to the various parts of the built configuration (the
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# kernel, the Upstart services, the init scripts, etc.) as well as a
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# script `switch-to-configuration' that activates the configuration
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# and makes it bootable.
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system = pkgs.stdenv.mkDerivation {
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name = "system";
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buildCommand = systemBuilder;
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inherit children;
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kernelParams =
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config.boot.kernelParams ++ config.boot.extraKernelParams;
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menuBuilder = config.system.build.menuBuilder;
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# Most of these are needed by grub-install.
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path = [
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pkgs.coreutils
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pkgs.gnused
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pkgs.gnugrep
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pkgs.findutils
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pkgs.diffutils
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config.system.build.upstart # for initctl
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];
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# Boot loaders
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bootLoader = config.system.boot.loader.id;
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grub =
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if config.boot.loader.grub.enable
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then (if config.boot.loader.grub.version == 1
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then pkgs.grub
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else pkgs.grub2)
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else null;
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grubDevice = config.boot.loader.grub.device;
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configurationName = config.boot.loader.grub.configurationName;
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};
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in {
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require = [options];
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system.build.toplevel = system;
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}
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