103 lines
3.7 KiB
Nix
103 lines
3.7 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}:
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let
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perlWrapped = pkgs.perl.withPackages (
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p: with p; [
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ConfigIniFiles
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FileSlurp
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]
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);
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in
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{
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options.system.switch = {
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enable = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = ''
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Whether to include the capability to switch configurations.
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Disabling this makes the system unable to be reconfigured via `nixos-rebuild`.
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This is good for image based appliances where updates are handled
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outside the image. Reducing features makes the image lighter and
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slightly more secure.
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'';
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};
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enableNg = lib.mkOption {
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type = lib.types.bool;
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default = config.system.switch.enable;
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defaultText = lib.literalExpression "config.system.switch.enable";
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description = ''
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Whether to use `switch-to-configuration-ng`, the Rust-based
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re-implementation of the original Perl `switch-to-configuration`.
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'';
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};
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};
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config = lib.mkMerge [
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(lib.mkIf (config.system.switch.enable && !config.system.switch.enableNg) {
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warnings = [
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''
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The Perl implementation of switch-to-configuration will be deprecated
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and removed in the 25.05 release of NixOS. Please migrate to the
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newer implementation by removing `system.switch.enableNg = false`
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from your configuration. If you are unable to migrate due to any
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issues with the new implementation, please create an issue and tag
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the maintainers of `switch-to-configuration-ng`.
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''
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];
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system.activatableSystemBuilderCommands = ''
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mkdir $out/bin
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substitute ${./switch-to-configuration.pl} $out/bin/switch-to-configuration \
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--subst-var out \
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--subst-var-by toplevel ''${!toplevelVar} \
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--subst-var-by coreutils "${pkgs.coreutils}" \
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--subst-var-by distroId ${lib.escapeShellArg config.system.nixos.distroId} \
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--subst-var-by installBootLoader ${lib.escapeShellArg config.system.build.installBootLoader} \
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--subst-var-by localeArchive "${config.i18n.glibcLocales}/lib/locale/locale-archive" \
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--subst-var-by perl "${perlWrapped}" \
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--subst-var-by shell "${pkgs.bash}/bin/sh" \
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--subst-var-by su "${pkgs.shadow.su}/bin/su" \
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--subst-var-by systemd "${config.systemd.package}" \
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--subst-var-by utillinux "${pkgs.util-linux}" \
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;
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chmod +x $out/bin/switch-to-configuration
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${lib.optionalString (pkgs.stdenv.hostPlatform == pkgs.stdenv.buildPlatform) ''
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if ! output=$(${perlWrapped}/bin/perl -c $out/bin/switch-to-configuration 2>&1); then
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echo "switch-to-configuration syntax is not valid:"
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echo "$output"
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exit 1
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fi
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''}
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'';
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})
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(lib.mkIf config.system.switch.enableNg {
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# Use a subshell so we can source makeWrapper's setup hook without
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# affecting the rest of activatableSystemBuilderCommands.
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system.activatableSystemBuilderCommands = ''
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(
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source ${pkgs.buildPackages.makeWrapper}/nix-support/setup-hook
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mkdir $out/bin
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ln -sf ${lib.getExe pkgs.switch-to-configuration-ng} $out/bin/switch-to-configuration
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wrapProgram $out/bin/switch-to-configuration \
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--set OUT $out \
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--set TOPLEVEL ''${!toplevelVar} \
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--set DISTRO_ID ${lib.escapeShellArg config.system.nixos.distroId} \
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--set INSTALL_BOOTLOADER ${lib.escapeShellArg config.system.build.installBootLoader} \
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--set LOCALE_ARCHIVE ${config.i18n.glibcLocales}/lib/locale/locale-archive \
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--set SYSTEMD ${config.systemd.package}
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)
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'';
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})
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];
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}
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