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b3c1d8c9ae
This flag allows the user to optionally exclude switch-to-confguration.pl from toplevel. This is interesting for appliance images where you don't want to re-build the system. This flag is called `rebuildable` because the standard interface to do this is `nixos-rebuild` which will not work anymore with this change.
80 lines
2.5 KiB
Nix
80 lines
2.5 KiB
Nix
{ options, config, lib, pkgs, ... }:
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let
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inherit (lib)
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mkOption
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types
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;
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systemBuilderArgs = {
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activationScript = config.system.activationScripts.script;
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dryActivationScript = config.system.dryActivationScript;
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};
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in
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{
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options = {
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system.activatable = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Whether to add the activation script to the system profile.
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The default, to have the script available all the time, is what we normally
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do, but for image based systems, this may not be needed or not be desirable.
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'';
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};
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system.activatableSystemBuilderCommands = options.system.systemBuilderCommands // {
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description = lib.mdDoc ''
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Like `system.systemBuilderCommands`, but only for the commands that are
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needed *both* when the system is activatable and when it isn't.
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Disclaimer: This option might go away in the future. It might be
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superseded by separating switch-to-configuration into a separate script
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which will make this option superfluous. See
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https://github.com/NixOS/nixpkgs/pull/263462#discussion_r1373104845 for
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a discussion.
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'';
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};
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system.build.separateActivationScript = mkOption {
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type = types.package;
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description = ''
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A separate activation script package that's not part of the system profile.
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This is useful for configurations where `system.activatable` is `false`.
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Otherwise, you can just use `system.build.toplevel`.
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'';
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};
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};
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config = {
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system.activatableSystemBuilderCommands = ''
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echo "$activationScript" > $out/activate
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echo "$dryActivationScript" > $out/dry-activate
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substituteInPlace $out/activate --subst-var-by out ''${!toplevelVar}
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substituteInPlace $out/dry-activate --subst-var-by out ''${!toplevelVar}
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chmod u+x $out/activate $out/dry-activate
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unset activationScript dryActivationScript
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'';
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system.systemBuilderCommands = lib.mkIf
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config.system.activatable
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config.system.activatableSystemBuilderCommands;
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system.systemBuilderArgs = lib.mkIf config.system.activatable
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(systemBuilderArgs // {
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toplevelVar = "out";
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});
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system.build.separateActivationScript =
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pkgs.runCommand
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"separate-activation-script"
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(systemBuilderArgs // {
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toplevelVar = "toplevel";
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toplevel = config.system.build.toplevel;
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})
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''
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mkdir $out
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${config.system.activatableSystemBuilderCommands}
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'';
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};
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}
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