den.lib

`den.lib.parametric`

Wraps an aspect with a __functor that filters includes by argument compatibility.

den.lib.parametric { nixos.x = 1; includes = [ ... ]; }

Default uses atLeast matching.

`den.lib.parametric.atLeast`

Same as parametric. Functions match if all required params are present.

`den.lib.parametric.exactly`

Functions match only if required params exactly equal provided params.

den.lib.parametric.exactly { includes = [ ({ host }: ...) ]; }

`den.lib.parametric.fixedTo`

Calls the aspect with a fixed context, ignoring the actual context:

den.lib.parametric.fixedTo { host = myHost; } someAspect

`den.lib.parametric.expands`

Extends the received context with additional attributes before dispatch:

den.lib.parametric.expands { extra = true; } someAspect

`den.lib.parametric.withOwn`

Low-level constructor. Takes a functor: self -> ctx -> aspect and wraps an aspect so that owned configs and statics are included at the static stage, and the functor runs at the parametric stage.

`den.lib.canTake`

Function argument introspection.

`den.lib.canTake params fn`

Returns true if fn’s required arguments are satisfied by params (atLeast).

`den.lib.canTake.atLeast params fn`

Same as canTake.

`den.lib.canTake.exactly params fn`

Returns true only if fn’s required arguments exactly match params.

`den.lib.take`

Conditional function application.

`den.lib.take.atLeast fn ctx`

Calls fn ctx if canTake.atLeast ctx fn, otherwise returns {}.

`den.lib.take.exactly fn ctx`

Calls fn ctx if canTake.exactly ctx fn, otherwise returns {}.

`den.lib.take.unused`

_unused: used: used — ignores first argument, returns second. Used for discarding aspect-chain in import-tree.

Context Shortcuts

These helpers are shortcuts built with den.lib.take.exactly and den.lib.parametric.fixedTo:

`den.lib.perHost aspect`

Run aspect only in { host } contexts.

`den.lib.perUser aspect`

Run aspect only in { host, user } contexts.

`den.lib.perHome aspect`

Run aspect only in { home } contexts.

`den.lib.statics`

Extracts only static includes from an aspect (non-function includes):

den.lib.statics someAspect { class = "nixos"; aspect-chain = []; }

`den.lib.owned`

Extracts owned configs from an aspect (removes includes, __functor):

den.lib.owned someAspect

`den.lib.isFn`

Returns true if the value is a function or has __functor:

den.lib.isFn myValue

`den.lib.isStatic`

Returns true if the function can take { class, aspect-chain }:

den.lib.isStatic myFn

`den.lib.__findFile`

The angle bracket resolver. See Angle Brackets Syntax.

_module.args.__findFile = den.lib.__findFile;

`den.lib.aspects`

Den aspects API. Provides aspect type definitions, resolve, resolve.withAdapter and basic adapters

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