zig-overlay/default.nix

{ pkgs ? import <nixpkgs> {},
  system ? builtins.currentSystem }:

let
  inherit (pkgs) lib;
  releases = builtins.fromJSON (lib.strings.fileContents ./sources.json);
  installPhase = ''
    mkdir -p $out/{doc,bin,lib}
    [ -d docs ] && cp -r docs/* $out/doc
    [ -d doc ] && cp -r doc/* $out/doc
    cp -r lib/* $out/lib
    cp zig $out/bin/zig
  '';
in lib.attrsets.mapAttrs (k: v:
  if k == "master" then
    lib.attrsets.mapAttrs (k: v:
      (pkgs.stdenv.mkDerivation {
        pname = "zig";
        inherit (v.${system}) version;
        src = pkgs.fetchurl {
          inherit (v.${system}) url sha256;
        };
        dontConfigure = true;
        dontBuild = true;
        dontFixup = true;
        installPhase = installPhase;
      }))
      v
  else
    pkgs.stdenv.mkDerivation {
      pname = "zig";
      inherit (v.${system}) version;
      src = pkgs.fetchurl {
        inherit (v.${system}) url sha256;
      };
      dontConfigure = true;
      dontBuild = true;
      dontFixup = true;
      installPhase = installPhase;
    })
  releases