nixos/redshift: use config file instead of passing parameters, using RFC42 #108739

thiagokokada · 2021-01-08T01:08:37Z

Motivation for this change

Not every option is exposed by redshift/gammastep parameters, for example gamma options are only exposed in configuration file. So this PR refactors this module to generate a configuration file and pass it to the redshift/gammastep using -c parameter.

This is a breaking change since there is no support for some of the older options like extraOptions. Also, the way to pass settings completely changed (but there is some aliases).

Second try of PR #108625, now following RFC 42. Also some parts of it taken from PR #50979.

Things done

nixos/modules/services/x11/redshift.nix

thiagokokada · 2021-01-08T16:16:05Z

Commit 73622d6 add tests so we can make sure this module works.

nixos-discourse · 2021-01-09T00:35:46Z

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/prs-ready-for-review/3032/437

thiagokokada · 2021-01-11T17:39:55Z

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nixos/modules/services/x11/redshift.nix

infinisil · 2021-01-12T20:28:13Z

nixos/modules/services/x11/redshift.nix

+      ${mainSection}.location-provider = lcfg.provider;
+      manual = mkIf isManual {
+        lat = mkIf options.location.latitude.isDefined lcfg.latitude;
+        lon = mkIf options.location.longitude.isDefined lcfg.longitude;


Don't check for them being defined here, because we want an error if they're not defined.

It is perfectly possible to use provider = manual and set dawn-time and dusk-time instead (this is what I do). Otherwise we need a hack like setting latitude and longitude to 0 just to use dawn-time and dusk-time.

Can location provider be set to null 🤔 ? If yes, I think I can remove those mkIfs for latitude/longitude.

Hum... Maybe checking if not dawn-time and dusk-time is set too would be better.

Ah so by selecting manual you have to either use lat/lon OR dawn-time/dusk-time? What happens if all four are set?

What I am thinking is a check like this:

manual = mkIf isManual && !((cfg.settings ? ${mainSection}.dawn-time) && (cfg.settings ? ${mainSection}.dusk-time)) { ... }

It is quite big, but I think would work. WDYT @infinisil 🤔 ?

Well, this doesn't work, infinite recursion.

Ok, going to remove the mkIfs. Can't think of a better solution and setting location = { latitude = 0.0; longitude = 0.0; } does the trick.

I'll take a look at this again later, but this isn't a great solution at the moment. There's a mismatch between redshift's idea of "manual" and the location provider's idea of "manual". I think the location provider module might need some change.

I also don't have a problem of having this merge as is and after those changes in location is done I end up fixing this. Like, it is not ideal to have to set location to use time options but it works.

BTW, I think location should support a location.provider = null. This would work in this case because if provider isn't set we just use full manual mode.

pkgs/applications/misc/redshift/default.nix

Not every option is exposed by redshift/gammastep parameters, for example gamma options are only exposed in configuration file. So this PR refactors this module to generate a configuration file and pass it to the redshift/gammastep using -c parameter. This is a breaking change since there is no support for some of the older options like `extraConfig`. Also, the way to pass settings completely changed (but there is some aliases).

thiagokokada · 2021-01-15T00:31:02Z

@infinisil Gave it a try in commit e59328b. It is kinda messy but I think it should look ok enough.

thiagokokada · 2021-01-15T00:36:57Z

nixos/modules/services/x11/redshift.nix

+  (map (option: mkRenamedOptionModule ([ "services" "redshift" ] ++ option.old) [ "services" "redshift" "settings" "redshift" option.new ]) [
+      { old = [ "temperature" "day" ];    new = "temp-day"; }
+      { old = [ "temperature" "night" ];  new = "temp-night"; }
+      { old = [ "brightness" "day" ];     new = "brightness-day"; }
+      { old = [ "brightness" "night" ];   new = "brightness-night"; }
+    ]);


Since we are already adding some options, maybe I could simply get those options back too with their old descriptions.

WDYT @infinisil ?

thiagokokada · 2021-01-15T00:45:01Z

nixos/modules/services/x11/redshift.nix

+    latitude = mkOption {
+      type = types.nullOr types.float;
+      default = null;
+      example = "0.0";


I don't know if this is a bug, but setting it as a float was making it not appear in manual.

…ptions This should make it more discoverable for the user what is the available options to needed to make the module work.

marvin-mk2 · 2021-01-18T05:00:05Z

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thiagokokada · 2021-01-19T14:54:20Z

@infinisil Sorry to bother, but can you re-review this? I think this is now what you requested in comment #108739 (comment).

infinisil · 2021-01-21T23:17:47Z

I don't have a lot of time recently sorry. The redshift module unfortunately is rather complicated and some changes are still needed to make it work nicely. I made some initial ones here, but I'm out of brain power for today, I hope to have time for some clean module writing soon!

thiagokokada · 2021-01-21T23:23:44Z

@infinisil Good to know that this PR will be in good hands 😄 . I kinda of want of it merged ASAP, but since I use the release channels and there is still sometime until 21.05 it probably can wait.

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xaverdh · 2021-02-03T11:43:37Z

I tested this with my configuration, looks good so far.

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stale · 2021-08-21T02:54:48Z

I marked this as stale due to inactivity. → More info

thiagokokada · 2021-11-11T22:27:49Z

If there is someone interested in this PR I can rebase it to a newer release, however I will probably remove myself as maintainer since I don't use it anymore (I am using the equivalent from Home-Manager).

thiagokokada · 2022-01-11T19:08:03Z

Closing some old PRs of mine.

ofborg bot added 6.topic: nixos Issues or PRs affecting NixOS modules, or package usability issues specific to NixOS 8.has: module (update) This PR changes an existing module in `nixos/` labels Jan 8, 2021

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nixos/redshift: use config file instead of passing parameters #108625

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nixos/redshift: add dawnTime/duskTime/latitude/longitude/useGeoclue o…

8e5f670

…ptions This should make it more discoverable for the user what is the available options to needed to make the module work.

thiagokokada mentioned this pull request Jan 28, 2021

redshift/gammastep: use ini file instead of passing parameters nix-community/home-manager#1751

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nixos/redshift: use config file instead of passing parameters, using RFC42 #108739

nixos/redshift: use config file instead of passing parameters, using RFC42 #108739

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thiagokokada commented Jan 8, 2021 • edited Loading

Motivation for this change

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