58 lines
1.9 KiB
Nix
58 lines
1.9 KiB
Nix
{ config, lib, utils, pkgs, ... }: let
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cfg = config.systemd.shutdownRamfs;
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ramfsContents = let
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storePaths = map (p: "${p}\n") cfg.storePaths;
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contents = lib.mapAttrsToList (_: v: "${v.source}\n${v.target}") (lib.filterAttrs (_: v: v.enable) cfg.contents);
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in pkgs.writeText "shutdown-ramfs-contents" (lib.concatStringsSep "\n" (storePaths ++ contents));
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in {
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options.systemd.shutdownRamfs = {
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enable = lib.mkEnableOption "pivoting back to an initramfs for shutdown" // { default = true; };
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contents = lib.mkOption {
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description = "Set of files that have to be linked into the shutdown ramfs";
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example = lib.literalExpression ''
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{
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"/lib/systemd/system-shutdown/zpool-sync-shutdown".source = writeShellScript "zpool" "exec ''${zfs}/bin/zpool sync"
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}
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'';
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type = utils.systemdUtils.types.initrdContents;
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};
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storePaths = lib.mkOption {
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description = ''
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Store paths to copy into the shutdown ramfs as well.
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'';
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type = lib.types.listOf lib.types.singleLineStr;
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default = [];
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};
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};
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config = lib.mkIf cfg.enable {
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systemd.shutdownRamfs.contents."/shutdown".source = "${config.systemd.package}/lib/systemd/systemd-shutdown";
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systemd.shutdownRamfs.storePaths = [pkgs.runtimeShell "${pkgs.coreutils}/bin"];
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systemd.services.generate-shutdown-ramfs = {
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description = "Generate shutdown ramfs";
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wantedBy = [ "shutdown.target" ];
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before = [ "shutdown.target" ];
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unitConfig = {
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DefaultDependencies = false;
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ConditionFileIsExecutable = [
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"!/run/initramfs/shutdown"
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];
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};
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path = [pkgs.util-linux pkgs.makeInitrdNGTool];
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serviceConfig.Type = "oneshot";
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script = ''
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mkdir -p /run/initramfs
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if ! mountpoint -q /run/initramfs; then
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mount -t tmpfs tmpfs /run/initramfs
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fi
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make-initrd-ng ${ramfsContents} /run/initramfs
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'';
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};
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};
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}
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