snowfallorg-lib/snowfall-lib/template/default.nix
2024-05-19 23:20:26 -07:00

51 lines
1.5 KiB
Nix

{
core-inputs,
user-inputs,
snowfall-lib,
snowfall-config,
}: let
inherit (builtins) baseNameOf;
inherit (core-inputs.nixpkgs.lib) assertMsg foldl mapAttrs;
user-templates-root = snowfall-lib.fs.get-snowfall-file "templates";
in {
template = {
## Create flake templates.
##
## Example Usage:
## ```nix
## create-templates { src = ./my-templates; overrides = { inherit another-template; }; alias = { default = "another-template"; }; }
## ```
##
## Result:
## ```nix
## { another-template = ...; my-template = ...; default = ...; }
## ```
#@ Attrs -> Attrs
create-templates = {
src ? user-templates-root,
overrides ? {},
alias ? {},
}: let
user-templates = snowfall-lib.fs.get-directories src;
create-template-metadata = template: {
name = builtins.unsafeDiscardStringContext (baseNameOf template);
path = template;
};
templates-metadata = builtins.map create-template-metadata user-templates;
merge-templates = templates: metadata:
templates
// {
${metadata.name} =
(overrides.${metadata.name} or {})
// {
inherit (metadata) path;
};
};
templates-without-aliases = foldl merge-templates {} templates-metadata;
aliased-templates = mapAttrs (name: value: templates-without-aliases.${value}) alias;
templates = templates-without-aliases // aliased-templates // overrides;
in
templates;
};
}