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flakelight

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18 Sep 2025
@accelbread:matrix.orgaccelbreadAh, I see. I'll take a look14:41:40
@accelbread:matrix.orgaccelbread

interestingly, something like the following in nix/withOverlays/default.nix works:

final: prev: (prev.lib.composeManyExtensions [
  prev.inputs.nixgl.overlays.default
  prev.inputs.emacs-overlay.overlays.package
  prev.inputs.self.overlays.overrides
  prev.inputs.self.overlays.lix
]) final prev

So computing the module arguments is triggering evaluation of withOverlays... hmm

15:10:09
@niclas:overby.meNiclas Overby Ⓝ

Does it make sense that this is supported?: (How does Flakelight know whether it is an overlay or a function to setup multiple overlays, like in my example ?)

withOverlays = overlay; 

Shouldn't it only support?:

withOverlays = [overlay, ...];
15:18:28
@accelbread:matrix.orgaccelbread ah it's type is defined as optListOf overlay; if what its set to is a list, its used as is, if its not a list its put in one 15:20:29
@accelbread:matrix.orgaccelbread so withOverlays = overlay is automatically converted to withOverlays = [ overlay ] by the module system 15:21:18
@accelbread:matrix.orgaccelbreadah that explains it15:24:36
@accelbread:matrix.orgaccelbread you can usually do { inputs, ...}: ... in a file because those options support being set to a function that takes module args 15:25:52
@accelbread:matrix.orgaccelbreadthis should be distinguishable though15:26:53
@accelbread:matrix.orgaccelbreadtesting a change that enables taking args when loading withOverlays16:36:34
@accelbread:matrix.orgaccelbread given that withOverlays = overlay is confusing with module args (i.e. cant do { inputs, ... }: final: prev: { ... }, must do {inputs, ... }: [( final: prev: { ... })]), and that I dont see others' repos on Github using that form, I'll deprecate the withOverlays = overlay syntax in favor of explicitly writing withOverlays = [ overlay ] 16:41:41
@accelbread:matrix.orgaccelbreadActually, don't need to deprecate that16:48:11
@accelbread:matrix.orgaccelbreadhttps://github.com/nix-community/flakelight/commit/464ab0a32efcc4310eef119cfc6c470e267cd42a16:59:47
@accelbread:matrix.orgaccelbreadthis should work now with the new commit17:01:15
@accelbread:matrix.orgaccelbread will need {inputs, ...}: instead of just {inputs}: 17:03:34
@accelbread:matrix.orgaccelbread Is there an issue with importing lib from nix/lib/default.nix? It already can take module args 17:11:26
@niclas:overby.meNiclas Overby ⓃNo I just assumed it didn't work either.19:06:40
@niclas:overby.meNiclas Overby ⓃNice thanks! :)19:07:19
@niclas:overby.meNiclas Overby Ⓝ

How is nixDirAliases suppose to work?

Is it really allowed to have multiple aliases, so you can e.g. have multiple folders with packages definitions like:

      nixDirAliases = {
        packages = ["dir1" "dir2"];
};
19:09:49
@niclas:overby.meNiclas Overby Ⓝ *

How is nixDirAliases suppose to work?

Is it really allowed to have multiple aliases, so you can e.g. have multiple folders with packages definitions like:

nixDirAliases = {
  packages = ["dir1" "dir2"];
};
19:10:05
@accelbread:matrix.orgaccelbreadIts intended to allow using "nixos" instead of "nixosConfigurations" and so on19:11:55
@accelbread:matrix.orgaccelbreadso you can give alternative names for dirs for that attribute19:12:24
@accelbread:matrix.orgaccelbreadfirst one will be used19:12:28
@accelbread:matrix.orgaccelbread so with nixDirAliases.foo = [ "bar" ] if theres no nix/foo.nix or nix/foo/ then nix/bar.nix and nix/bar/ will be checked and used equivalently 19:13:55
@niclas:overby.meNiclas Overby ⓃBut why is it a list then?19:14:27
@accelbread:matrix.orgaccelbread multiple aliases can exist, like if you wanted nixosConf to also work 19:15:06
@accelbread:matrix.orgaccelbread nixDirAliases.foo = [ "bar" "baz" ] checks all of the foo, bar, and baz paths in order and uses the first one to set foo 19:16:05
@niclas:overby.meNiclas Overby ⓃOh makes sense, but it could also be useful, if you could have multiple aliases that merges together :)19:18:02
@accelbread:matrix.orgaccelbreadhmm, yeah that could be possible19:19:13
@accelbread:matrix.orgaccelbreadDo you have an example of how you'd use it? Like for multiple dirs of packages?19:20:24
@niclas:overby.meNiclas Overby ⓃRedacted or Malformed Event19:22:02

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