oeiuwq.com
Modular, context-aware and aspect-oriented dendritic Nix configurations.
Discussions: https://oeiuwq.zulipchat.com/join/nqp26cd4kngon6mo3ncgnuap/
den.oeiuwq.com
configurations
den
dendritic
nix
aspect
oriented
Add more tests
+10
-8
nix/lib.nix
+10
-8
nix/lib.nix
···
67
67
68
68
parametric.atLeast = funk (lib.flip take.atLeast);
69
69
parametric.exactly = funk (lib.flip take.exactly);
70
-
parametric.fixedTo = lib.flip parametric.atLeast;
71
-
parametric.expands = attrs: funk (ctx: (lib.flip take.atLeast) (ctx // attrs));
70
+
parametric.fixedTo = lib.flip (parametric.withOwn parametric.atLeast);
71
+
parametric.expands =
72
+
attrs: aspect: ctx:
73
+
parametric.fixedTo (ctx // attrs) aspect;
72
74
parametric.withOwn =
73
-
aspect:
75
+
functor: aspect:
74
76
aspect
75
77
// {
76
78
__functor = self: ctx: {
77
79
includes = [
78
-
(parametric.atLeast self ctx)
80
+
(functor self ctx)
79
81
(owned self)
80
82
({
81
83
includes = map (applyStatics ctx) self.includes;
···
84
86
};
85
87
};
86
88
parametric.__functor =
87
-
self: arg:
89
+
_: arg:
88
90
if arg == true then
89
-
self.atLeast
91
+
parametric.atLeast
90
92
else if arg == false then
91
-
self.exactly
93
+
parametric.exactly
92
94
else if builtins.isAttrs arg then
93
-
self.withOwn arg
95
+
parametric.withOwn parametric.atLeast arg
94
96
else
95
97
funk arg;
96
98
+26
-2
templates/examples/modules/_example/ci/parametric-with-owned.nix
+26
-2
templates/examples/modules/_example/ci/parametric-with-owned.nix
···
6
6
b = strOpt;
7
7
c = strOpt;
8
8
d = strOpt;
9
+
e = strOpt;
10
+
f = strOpt;
9
11
};
10
12
strOpt = lib.mkOption { type = lib.types.str; };
13
+
14
+
inherit (den.lib) parametric;
11
15
in
12
16
{
13
17
···
21
25
# its owned configs and static (non-functional) includes.
22
26
# Usage: just call `parametric` with an aspect.
23
27
# or alternatively, set `__functor = den.lib.parametric;`
24
-
den.aspects.fwd._.first = den.lib.parametric {
28
+
den.aspects.fwd._.first = parametric {
25
29
nixos.fwd.a = "First owned A";
26
30
includes = [
27
31
den.aspects.fwd._.second
28
32
{ nixos.fwd.d = "First static includes D"; }
29
33
den.aspects.fwd._.never
34
+
den.aspects.fwd._.fourth
30
35
];
31
36
};
32
37
···
34
39
# the first aspect forwards whatever context it receives.
35
40
den.aspects.fwd._.second =
36
41
{ host, ... }:
37
-
{
42
+
parametric.fixedTo { third = "Impact"; } {
38
43
nixos.fwd.b = "Second owned B for ${host.name}";
44
+
includes = [ den.aspects.fwd._.third ];
45
+
};
46
+
47
+
den.aspects.fwd._.third =
48
+
{ third, ... }:
49
+
{
50
+
nixos.fwd.e = "Third ${third}";
51
+
};
52
+
53
+
den.aspects.fwd._.fourth = parametric.expands { planet = "Earth"; } {
54
+
includes = [ den.aspects.fwd._.fifth ];
55
+
};
56
+
57
+
den.aspects.fwd._.fifth =
58
+
{ host, planet, ... }:
59
+
{
60
+
nixos.fwd.f = "Fifth ${planet} ${host.name}";
39
61
};
40
62
41
63
den.aspects.fwd._.never =
···
52
74
&& rockhopper.config.fwd.b == "Second owned B for rockhopper"
53
75
&& rockhopper.config.fwd.c == "host owned C"
54
76
&& rockhopper.config.fwd.d == "First static includes D"
77
+
&& rockhopper.config.fwd.e == "Third Impact"
78
+
&& rockhopper.config.fwd.f == "Fifth Earth rockhopper"
55
79
);
56
80
};
57
81