45 lines
1.5 KiB
Nix
45 lines
1.5 KiB
Nix
{stdenv, getConfig, fetchurl, callPackage}:
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let
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inherit (stdenv.lib) fold optional;
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gemsMergeableFun = { generatedFuns ? [], patchFuns ? [], overrideFuns ? [] }:
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let
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generatedAttrs = map (f: f customGems) generatedFuns;
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generatedGems = map (a: a.gems) generatedAttrs;
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gem = callPackage ./gem.nix {
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patches = map (f: callPackage f { inherit gems; }) patchFuns;
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overrides = map (f: callPackage f { }) overrideFuns;
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};
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customGems = stdenv.lib.mapAttrs gem (fold (x: y: x // y) { } generatedGems);
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gems = fold (x: y: x // y) customGems (map (a: a.aliases) generatedAttrs);
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in
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gems // {
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merge = { generated ? null, patches ? null, overrides ? null }:
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gemsMergeableFun {
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generatedFuns = generatedFuns ++ optional (generated != null) generated;
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patchFuns = patchFuns ++ optional (patches != null) patches;
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overrideFuns = overrideFuns ++ optional (overrides != null) overrides;
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};
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};
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in
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((gemsMergeableFun { }).merge {
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generated = import ./generated.nix;
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patches = import ./patches.nix;
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overrides = import ./overrides.nix;
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}).merge (
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let
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localGemDir = (builtins.getEnv "HOME") + "/.nixpkgs/gems/";
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getLocalGemFun = name:
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let
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file = localGemDir + name + ".nix";
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fallback =
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if builtins.pathExists file then import (builtins.toPath file)
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else null;
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in
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getConfig [ "gems" name ] fallback;
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in
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{
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generated = getLocalGemFun "generated";
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patches = getLocalGemFun "patches";
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overrides = getLocalGemFun "overrides";
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})
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