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flake-parts/modules/packages.nix

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{ config, lib, flake-modules-core-lib, ... }:
let
inherit (lib)
filterAttrs
genAttrs
mapAttrs
mkOption
optionalAttrs
types
;
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inherit (flake-modules-core-lib)
mkSubmoduleOptions
;
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in
{
options = {
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flake = mkSubmoduleOptions {
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packages = mkOption {
type = types.lazyAttrsOf (types.lazyAttrsOf types.package);
default = { };
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description = ''
Per system an attribute set of packages.
nix build .#<name> will build packages.<system>.<name>.
'';
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};
};
};
config = {
flake.packages =
mapAttrs
(k: v: v.packages)
(filterAttrs
(k: v: v.packages != null)
(genAttrs config.systems config.perSystem)
);
perInput = system: flake:
optionalAttrs (flake?packages.${system}) {
packages = flake.packages.${system};
};
perSystem = system: { config, ... }: {
_file = ./packages.nix;
options = {
packages = mkOption {
type = types.lazyAttrsOf types.package;
default = { };
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description = ''
An attribute set of packages to be built by nix build .#<name>.
nix build .#<name> will build packages.<name>.
'';
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};
};
};
};
}