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lib: supportedSystems: let
inherit (builtins) attrNames baseNameOf elem getContext head mapAttrs seq stringLength substring;
inherit (lib) filterAttrs;
check = string: elem string supportedSystems;
in rec {
# filters systems in basic flake output
# ex:
#
# packages = {
# x86_64-linux = {};
# aarch64-linux = {};
# x86_64-darwin = {};
# aarch64-darwin = {};
# };
# mkCompatible packages -> {x86_64-linux = {}; aarch64-linux = {};}
mkCompatible = filterAttrs (system: _: check system);
# mkCompatible but for apps, since their attribute
# also needs to be editied in order to be picked up
# by hydra
mkCompatibleApps = apps:
mkCompatible (mapAttrs (
_:
mapAttrs (_: v: {
program = let
ctx = getContext v.program;
drvPath = head (attrNames ctx);
basename = baseNameOf drvPath;
hashLength = 33;
l = stringLength basename;
in {
name = substring hashLength (l - hashLength - 4) basename;
type = "derivation";
inherit drvPath;
};
})
)
apps);
# mkCompatible but for formatters
mkCompatibleFormatters = filterAttrs (system: fmt: check system && elem system (fmt.meta.platforms or []));
# mkComaptible, but maps nixosConfigurations
# to their toplevel build attribute so they can
# be picked up by hydra
mkCompatibleCfg = configs:
filterAttrs (_: config: check config.system)
(mapAttrs (_: v: v.config.system.build.toplevel) configs);
# mkCompatibleCfg, but the toplevel build attribute
# is only evaluated
mkCompatibleCfg' = configs:
filterAttrs (_: config: check config.system)
(mapAttrs (_: v:
seq
v.config.system.build.toplevel
v._module.args.pkgs.emptyFile)
configs);
# mkCompatible, but maps homeConfigurations
# to their activationPackage so they can be
# picked up by hydra
mkCompatibleHM = configs:
filterAttrs (system: _: check system)
(mapAttrs (_: mapAttrs (_: deriv: deriv.activationPackage or {})) configs);
# mkCompatible, but for packages
# meta.platforms is also checked to ensure compatibility
mkCompatiblePkgs = mapAttrs (system: filterAttrs (_: deriv: elem system (deriv.meta.platforms or [])));
}
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