haskell-modules: Add replacements-by-name

{ pkgs, haskellLib }:

let

  inherit (pkgs) lib;

  inherit (lib.strings) hasSuffix removeSuffix;

  pathsByName =

    lib.concatMapAttrs

      (name: type:

        lib.optionalAttrs (type == "regular" && hasSuffix ".nix" name) {

          ${removeSuffix ".nix" name} = ./replacements-by-name + "/${name}";

        }

      )

      (builtins.readDir ./replacements-by-name);

in

# EXTRA HASKELL PACKAGES NOT ON HACKAGE

#

# This file should only contain packages that are not in ./hackage-packages.nix.

  hercules-ci-optparse-applicative = self.callPackage ../misc/haskell/hercules-ci-optparse-applicative.nix {};

}

// lib.mapAttrs (_name: path: self.callPackage path {}) pathsByName

# haskell-modules/replacements-by-name

This directory is scanned, and all `.nix` files are called in order to replace their respective packages in the `haskellPackages` set.

They're loaded after `hackage-packages.nix` but before any overrides are applied.

See [non-hackage-packages.nix](../non-hackage-packages.nix) for the implementation.

This is used for selective backports of updates, as the hackage package set won't be updated in its entirety.