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flake-utils/filterPackages.nix
Gytis Ivaskevicius 98c8d36b18
Add checks-utils (#36)
* Add checks-utils overlay

Add checks-utils overlay

Fix example flake inputs

Fix string expected exception

* Update check-utils implementation

* nixpkgs-fmt
2021-06-14 10:47:39 +02:00

31 lines
948 B
Nix

{ allSystems }:
system: packages:
let
# Adopted from nixpkgs.lib
inherit (builtins) listToAttrs concatMap attrNames;
nameValuePair = name: value: { inherit name value; };
filterAttrs = pred: set:
listToAttrs (
concatMap
(name:
let v = set.${name}; in
if pred name v then [ (nameValuePair name v) ] else [ ]
)
(attrNames set)
);
# Everything that nix flake check requires for the packages output
sieve = n: v:
with v;
let
inherit (builtins) isAttrs;
isDerivation = x: isAttrs x && x ? type && x.type == "derivation";
isBroken = meta.broken or false;
platforms = meta.hydraPlatforms or meta.platforms or allSystems;
in
# check for isDerivation, so this is independently useful of
# flattenTree, which also does filter on derviations
isDerivation v && !isBroken && builtins.elem system platforms
;
in
filterAttrs sieve packages