devos/lib/utils.nix
Timothy DeHerrera f8f67d2dcb
packages: apply overlays to output packages
Apply overlays to output packages so we can easily use a modified
package.
2021-01-18 02:23:49 -07:00

90 lines
2.4 KiB
Nix

{ lib, ... }:
let
inherit (builtins) attrNames attrValues isAttrs readDir listToAttrs mapAttrs;
inherit (lib) fold filterAttrs hasSuffix mapAttrs' nameValuePair removeSuffix
recursiveUpdate genAttrs;
# mapFilterAttrs ::
# (name -> value -> bool )
# (name -> value -> { name = any; value = any; })
# attrs
mapFilterAttrs = seive: f: attrs: filterAttrs seive (mapAttrs' f attrs);
# Generate an attribute set by mapping a function over a list of values.
genAttrs' = values: f: listToAttrs (map f values);
pkgImport = nixpkgs: overlays: system:
import nixpkgs {
inherit system overlays;
config = { allowUnfree = true; };
};
# Convert a list to 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:
genAttrs' paths (path: {
name = removeSuffix ".nix" (baseNameOf path);
value = import path;
});
in
{
inherit mapFilterAttrs genAttrs' pkgImport pathsToImportedAttrs;
overlayPaths =
let
overlayDir = ../overlays;
fullPath = name: overlayDir + "/${name}";
in
map fullPath (attrNames (readDir overlayDir));
recImport = { dir, _import ? base: import "${dir}/${base}.nix" }:
mapFilterAttrs
(_: v: v != null)
(n: v:
if n != "default.nix" && hasSuffix ".nix" n && v == "regular"
then
let name = removeSuffix ".nix" n; in nameValuePair (name) (_import name)
else
nameValuePair ("") (null))
(readDir dir);
modules =
let
# binary cache
cachix = import ../cachix.nix;
cachixAttrs = { inherit cachix; };
# modules
moduleList = import ../modules/list.nix;
modulesAttrs = pathsToImportedAttrs moduleList;
# profiles
profilesList = import ../profiles/list.nix;
profilesAttrs = { profiles = pathsToImportedAttrs profilesList; };
in
recursiveUpdate
(recursiveUpdate cachixAttrs modulesAttrs)
profilesAttrs;
genPackages = { self, pkgs }:
let
inherit (self) overlay overlays;
packagesNames = attrNames (overlay null null)
++ attrNames (fold
(attr: sum: recursiveUpdate sum attr)
{ }
(attrValues
(mapAttrs (_: v: v null null) overlays)
)
);
in
fold
(key: sum: recursiveUpdate sum {
${key} = pkgs.${key};
})
{ }
packagesNames;
}