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/*
This module adds the activation script to toplevel, so that any previously
built configuration can be activated again, as long as they're available in
the store, e.g. through the profile's older generations.
Alternate applications of the NixOS modules may omit this module, e.g. to
build images that are pre-activated and omit the activation script and its
dependencies.
*/
{ config, lib, pkgs, ... }:
let
inherit (lib)
optionalString
;
perlWrapped = pkgs.perl.withPackages (p: with p; [ ConfigIniFiles FileSlurp ]);
in
{
config = {
system.systemBuilderArgs = {
activationScript = config.system.activationScripts.script;
dryActivationScript = config.system.dryActivationScript;
};
system.systemBuilderCommands = ''
echo "$activationScript" > $out/activate
echo "$dryActivationScript" > $out/dry-activate
substituteInPlace $out/activate --subst-var out
substituteInPlace $out/dry-activate --subst-var out
chmod u+x $out/activate $out/dry-activate
unset activationScript dryActivationScript
mkdir $out/bin
substitute ${./switch-to-configuration.pl} $out/bin/switch-to-configuration \
--subst-var out \
--subst-var-by coreutils "${pkgs.coreutils}" \
--subst-var-by distroId ${lib.escapeShellArg config.system.nixos.distroId} \
--subst-var-by installBootLoader ${lib.escapeShellArg config.system.build.installBootLoader} \
--subst-var-by localeArchive "${config.i18n.glibcLocales}/lib/locale/locale-archive" \
--subst-var-by perl "${perlWrapped}" \
--subst-var-by shell "${pkgs.bash}/bin/sh" \
--subst-var-by su "${pkgs.shadow.su}/bin/su" \
--subst-var-by systemd "${config.systemd.package}"\
--subst-var-by utillinux "${pkgs.util-linux}" \
;
chmod +x $out/bin/switch-to-configuration
${optionalString (pkgs.stdenv.hostPlatform == pkgs.stdenv.buildPlatform) ''
if ! output=$(${perlWrapped}/bin/perl -c $out/bin/switch-to-configuration 2>&1); then
echo "switch-to-configuration syntax is not valid:"
echo "$output"
exit 1
fi
''}
'';
};
}
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