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Modular, context-aware and aspect-oriented dendritic Nix configurations.
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den.oeiuwq.com
configurations
den
dendritic
nix
aspect
oriented
1{ den, lib, ... }:
2let
3 inherit (den.lib) take;
4 inherit (den.lib.parametric) fixedTo atLeast;
5
6 ctx.user.description = ''
7 ## Context: den.ctx.user{host,user}
8
9 User context stage is produced by Host for each user.
10
11 This is a **continuation** of the pipeline started by `den.ctx.host`.
12
13 IMPORTANT: The configuration obtained from `den.ctx.user` is provided to the Host OS level
14
15 In Den, home-manager/hjem/maid are just forwarding classes that produce config at the OS
16 level: `home-manager.users.<alice>`, `hjem.users.<alice>`, `users.users.<alice>`, etc.
17
18 A `den.ctx.user{host,user}` transitions unconditionally into `den.ctx.default{host,user}`
19
20 A `den.ctx.user{host,user}` obtains OS configuration nixos/darwin by using `fixedTo{host,user} user-aspect`.
21 fixedTo takes:
22 - user-aspect's owned attrs
23 - static includes like { nixos.foo = ... } or ({ class, aspect-chain }: { nixos.foo = ...; })
24 - atLeast{host,user} parametric includes like ({ host,user }: { nixos.foo = ...; })
25
26 '';
27
28 ctx.user.into.default = lib.singleton;
29 ctx.user.provides.user = take.exactly from-user;
30
31 from-user = { host, user }: fixedTo { inherit host user; } den.aspects.${user.aspect};
32
33in
34{
35 den.ctx = ctx;
36}