Modular, context-aware and aspect-oriented dendritic Nix configurations.
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den.oeiuwq.com
configurations
den
dendritic
nix
aspect
oriented
Fix dups from parametric owned modules (#100)
Fixes #101
authored by
GitHub
f6169af6
2034ed6f
+44
-23
+27
-15
nix/lib.nix
+27
-15
nix/lib.nix
···
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isFn = f: (builtins.isFunction f) || (f ? __functor);
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canTake = import ./fn-can-take.nix lib;
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-
empty = {
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includes = [ ];
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__functor =
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-
self:
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# deadnix: skip
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{ class, aspect-chain }:
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-
self;
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};
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-
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# an aspect producing only owned configs
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-
owned = aspect: aspect // empty;
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+
owned = (lib.flip builtins.removeAttrs) [
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"includes"
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"__functor"
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];
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# only static includes from an aspect.
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statics =
···
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class = "";
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aspect-chain = [ ];
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};
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isCtxStatic = (lib.flip canTake.exactly) (
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# deadnix: skip
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{ class, aspect-chain }: true
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);
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take.unused = _unused: used: used;
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take.exactly = take canTake.exactly;
···
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parametric.atLeast = funk (lib.flip take.atLeast);
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parametric.exactly = funk (lib.flip take.exactly);
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parametric.fixedTo = lib.flip (parametric.withOwn parametric.atLeast);
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parametric.expands =
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attrs: aspect: ctx:
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parametric.fixedTo (ctx // attrs) aspect;
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parametric.fixedTo =
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ctx: aspect:
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{ class, aspect-chain }:
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{
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includes = [
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(parametric.atLeast aspect ctx)
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(parametricStatics aspect { inherit class aspect-chain; })
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+
];
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+
};
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parametric.withOwn =
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functor: aspect:
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aspect
···
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__functor = self: ctx: {
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includes = [
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(functor self ctx)
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-
(owned self)
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({
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includes = map (applyStatics ctx) self.includes;
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-
})
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(parametricStatics self ctx)
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];
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};
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};
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parametric.__functor = _: parametric.withOwn parametric.atLeast;
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+
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parametricStatics = self: ctx: {
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includes = lib.optionals (isCtxStatic ctx) [
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(owned self)
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{
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includes = map (applyStatics ctx) self.includes;
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}
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];
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};
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aspects = inputs.flake-aspects.lib lib;
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+17
-8
templates/examples/modules/_example/ci/parametric-with-owned.nix
+17
-8
templates/examples/modules/_example/ci/parametric-with-owned.nix
···
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d = strOpt;
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e = strOpt;
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f = strOpt;
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# unlike strings, pkgs cannot be duplicated, we use this to
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# ensure no-dups are created from parametric owned modules.
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pkg = lib.mkOption { type = lib.types.package; };
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};
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strOpt = lib.mkOption { type = lib.types.str; };
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···
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# this aspect will take any context and also forward it
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# into any includes function that can take same context.
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den.aspects.fwd._.first = parametric {
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nixos.fwd.a = "First owned A";
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nixos =
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{ pkgs, ... }:
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{
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fwd.a = "First owned A";
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fwd.pkg = pkgs.hello;
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};
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includes = [
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den.aspects.fwd._.second
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{ nixos.fwd.d = "First static includes D"; }
···
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perSystem =
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{ checkCond, rockhopper, ... }:
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{
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checks.parametric-fwd = checkCond "forwarding ctx with owned" (
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rockhopper.config.fwd.a == "First owned A"
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&& rockhopper.config.fwd.b == "Second owned B for rockhopper"
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&& rockhopper.config.fwd.c == "host owned C"
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&& rockhopper.config.fwd.d == "First static includes D"
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&& rockhopper.config.fwd.e == "Third Impact"
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&& rockhopper.config.fwd.f == "Fifth Earth rockhopper"
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checks.parametric-fwd-a = checkCond "fwd-a" (rockhopper.config.fwd.a == "First owned A");
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+
checks.parametric-fwd-b = checkCond "fwd-b" (
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rockhopper.config.fwd.b == "Second owned B for rockhopper"
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);
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checks.parametric-fwd-c = checkCond "fwd-c" (rockhopper.config.fwd.c == "host owned C");
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checks.parametric-fwd-d = checkCond "fwd-d" (rockhopper.config.fwd.d == "First static includes D");
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checks.parametric-fwd-e = checkCond "fwd-e" (rockhopper.config.fwd.e == "Third Impact");
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checks.parametric-fwd-f = checkCond "fwd-f" (rockhopper.config.fwd.f == "Fifth Earth rockhopper");
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checks.parametric-fwd-pkg = checkCond "fwd-pkg" (lib.getName rockhopper.config.fwd.pkg == "hello");
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};
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}