depot/third_party/nixpkgs/nixos/modules/system/activation/activatable-system.nix
Default email 587713944a Project import generated by Copybara.
GitOrigin-RevId: 6143fc5eeb9c4f00163267708e26191d1e918932
2024-04-21 17:54:59 +02:00

79 lines
2.5 KiB
Nix

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superseded by separating switch-to-configuration into a separate script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