{ config, lib, pkgs, ... }: with lib; let inherit (pkgs) stdenvNoCC; cfg = config.system; failedAssertions = map (x: x.message) (filter (x: !x.assertion) config.assertions); throwAssertions = res: if (failedAssertions != []) then throw "\nFailed assertions:\n${concatStringsSep "\n" (map (x: "- ${x}") failedAssertions)}" else res; showWarnings = res: fold (w: x: builtins.trace "warning: ${w}" x) res config.warnings; in { options = { system.build = mkOption { internal = true; type = types.attrsOf types.unspecified; default = {}; description = '' Attribute set of derivation used to setup the system. ''; }; system.path = mkOption { internal = true; type = types.package; description = '' The packages you want in the system environment. ''; }; system.profile = mkOption { type = types.path; default = "/nix/var/nix/profiles/system"; description = '' Profile to use for the system. ''; }; assertions = mkOption { type = types.listOf types.unspecified; internal = true; default = []; example = [ { assertion = false; message = "you can't enable this for that reason"; } ]; description = '' This option allows modules to express conditions that must hold for the evaluation of the system configuration to succeed, along with associated error messages for the user. ''; }; warnings = mkOption { internal = true; default = []; type = types.listOf types.str; example = [ "The `foo' service is deprecated and will go away soon!" ]; description = '' This option allows modules to show warnings to users during the evaluation of the system configuration. ''; }; }; config = { system.build.toplevel = throwAssertions (showWarnings (stdenvNoCC.mkDerivation { name = "darwin-system-${cfg.darwinLabel}"; preferLocalBuild = true; activationScript = cfg.activationScripts.script.text; activationUserScript = cfg.activationScripts.userScript.text; inherit (cfg) darwinLabel; buildCommand = '' mkdir $out systemConfig=$out mkdir -p $out/darwin cp -f ${../../CHANGELOG} $out/darwin-changes ln -s ${cfg.build.patches}/patches $out/patches ln -s ${cfg.build.etc}/etc $out/etc ln -s ${cfg.path} $out/sw mkdir -p $out/Library ln -s ${cfg.build.applications}/Applications $out/Applications ln -s ${cfg.build.fonts}/Library/Fonts $out/Library/Fonts ln -s ${cfg.build.launchd}/Library/LaunchAgents $out/Library/LaunchAgents ln -s ${cfg.build.launchd}/Library/LaunchDaemons $out/Library/LaunchDaemons mkdir -p $out/user/Library ln -s ${cfg.build.launchd}/user/Library/LaunchAgents $out/user/Library/LaunchAgents echo "$activationScript" > $out/activate substituteInPlace $out/activate --subst-var out chmod u+x $out/activate unset activationScript echo "$activationUserScript" > $out/activate-user substituteInPlace $out/activate-user --subst-var out chmod u+x $out/activate-user unset activationUserScript echo -n "$systemConfig" > $out/systemConfig echo -n "$darwinLabel" > $out/darwin-version echo -n "$system" > $out/system ''; })); }; }