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Modular, context-aware and aspect-oriented dendritic Nix configurations.
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1{ den, withSystem, ... }:
2{
3 den.provides.self' = den.lib.parametric.exactly {
4 description = ''
5 Provides the `flake-parts` `self'` (the flake's `self` with system pre-selected)
6 as a top-level module argument.
7
8 This allows modules to access per-system flake outputs without needing
9 `pkgs.stdenv.hostPlatform.system`.
10
11 ## Usage
12
13 **Global (Recommended):**
14 Apply to all hosts, users, and homes.
15
16 den.default.includes = [ den._.self' ];
17
18 **Specific:**
19 Apply only to a specific host, user, or home aspect.
20
21 den.aspects.my-laptop.includes = [ den._.self' ];
22 den.aspects.alice.includes = [ den._.self' ];
23
24 **Note:** This aspect is contextual. When included in a `host` aspect, it
25 configures `self'` for the host's OS. When included in a `user` or `home`
26 aspect, it configures `self'` for the corresponding Home Manager configuration.
27 '';
28
29 includes = [
30 (
31 { OS, host }:
32 let
33 unused = den.lib.take.unused OS;
34 in
35 withSystem host.system (
36 { self', ... }:
37 {
38 ${host.class}._module.args.self' = unused self';
39 }
40 )
41 )
42 (
43 {
44 OS,
45 HM,
46 user,
47 host,
48 }:
49 let
50 unused = den.lib.take.unused [
51 OS
52 HM
53 ];
54 in
55 withSystem host.system (
56 { self', ... }:
57 {
58 ${user.class}._module.args.self' = unused self';
59 }
60 )
61 )
62 (
63 { HM, home }:
64 let
65 unused = den.lib.take.unused HM;
66 in
67 withSystem home.system (
68 { self', ... }:
69 {
70 ${home.class}._module.args.self' = unused self';
71 }
72 )
73 )
74 ];
75 };
76}