devos/lib/attrs.nix
Pacman99 fb14e20249 lib/filterPackages: filter by flake requirements
returns only non-broken derivations that support the system.
2021-03-26 16:55:27 -07:00

38 lines
1.2 KiB
Nix

{ lib, ... }:
rec {
# mapFilterAttrs ::
# (name -> value -> bool )
# (name -> value -> { name = any; value = any; })
# attrs
mapFilterAttrs = seive: f: attrs:
lib.filterAttrs
seive
(lib.mapAttrs' f attrs);
# Generate an attribute set by mapping a function over a list of values.
genAttrs' = values: f: lib.listToAttrs (map f values);
# Convert a list of file paths to attribute set
# that has the filenames stripped of nix extension as keys
# and imported content of the file as value.
#
pathsToImportedAttrs = paths:
let
paths' = lib.filter (lib.hasSuffix ".nix") paths;
in
genAttrs' paths' (path: {
name = lib.removeSuffix ".nix" (baseNameOf path);
value = import path;
});
concatAttrs = lib.fold (attr: sum: lib.recursiveUpdate sum attr) { };
# Filter out packages that support given system and follow flake check requirements
filterPackages = system: packages:
let
# Everything that nix flake check requires for the packages output
filter = (n: v: with v; let platforms = meta.hydraPlatforms or meta.platforms or [ ]; in
lib.isDerivation v && !meta.broken && builtins.elem system platforms);
in
lib.filterAttrs filter packages;
}