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Defer managing the nix services to determinate-nixd (builds on top of #50) #53

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Defer managing the nix services to determinate-nixd (builds on top of #50) #53

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b8a4d0a
Defeat delete / replace logic for the plists
grahamc Jan 10, 2025
31b7e36
derp
grahamc Jan 10, 2025
975a377
Don't allow a user to transition into a broken system
grahamc Jan 10, 2025
7d1799e
Simplify the test
grahamc Jan 10, 2025
8ffe2ef
explicit path to dnixd
grahamc Jan 10, 2025
8215302
pin
grahamc Jan 13, 2025
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34 changes: 33 additions & 1 deletion modules/nix-darwin-unmanaged.nix
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Original file line number Diff line number Diff line change
@@ -1,4 +1,15 @@
{ lib, ... }: {
{ lib, pkgs, ... }:
let
failWithoutDeterminateMessage = ''
if ! /usr/local/bin/determinate-nixd status > /dev/null 2>&1 ; then
echo "Determinate is not installed."
echo "Download and install the Determinate package before activating the nix-darwin module."
echo ""
echo "https://docs.determinate.systems/get-started"
exit 1
fi
'';
in {
# Disable some modules that conflict with determinate-nixd.
disabledModules = [
# Wants to add an outdated Nix to the environment, manage nix.conf, manage the
Expand Down Expand Up @@ -72,4 +83,25 @@

# Determinate.pkg can handle fixing build users itself.
config.system.checks.verifyBuildUsers = false;


### Help the user migrate from managed to unmanaged

# Scenario: user has an upstream Nix installation that they want to transition to Determinate
config.system.activationScripts.preActivation.text = lib.mkBefore failWithoutDeterminateMessage;
config.system.activationScripts.preUserActivation.text = lib.mkBefore failWithoutDeterminateMessage;

# Scenario: user has previously used the "default" determinate module before we went to an unmanaged nix.
#
# The symlinks defeat nix-darwin's activation-time unload/update/reload logic for launchd services.
# Because the symlink points to the file, they have the same content, nix-darwin won't try to update or reload the service.
#
# It also defeats nix-darwin's deletion logic, which will delete any LaunchDaemon that was managed by the previously active generation and is not present in the now-activating generation.
# Since the file will now exist in the new profile's LaunchDaemons directory, it will not be deleted.
config.environment.launchDaemons."systems.determinate.nix-store.plist".source = pkgs.runCommand "nix-store-ln" {} ''
ln -s /Library/LaunchDaemons/systems.determinate.nix-store.plist $out
'';
config.environment.launchDaemons."systems.determinate.nix-daemon.plist".source = pkgs.runCommand "nix-daemon-ln" {} ''
ln -s /Library/LaunchDaemons/systems.determinate.nix-daemon.plist $out
'';
}
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