35 lines
1 KiB
Nix
35 lines
1 KiB
Nix
{ pkgs, ... }:
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{
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# Create a nix-shell for Haskell development.
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shell = { deps }:
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let
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ghc = pkgs.haskellPackages.ghcWithPackages (hpkgs: deps hpkgs);
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in
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pkgs.mkShell {
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buildInputs = [ ghc ];
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};
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# Build a Haskell executable. This assumes a project directory with a
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# top-level Main.hs.
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# - `name`: You can find the result at ./result/$name
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# - `srcs`: Will be passed to `srcs` field of `pkgs.stdenv.mkDerivation`.
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# - `deps`: A function that accepts `hpkgs` and returns a list of Haskell
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# - `ghcExtensions`: A list of strings representing the language extensions to
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# use.
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program = { name, srcs, deps, ghcExtensions }:
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let
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ghc = pkgs.haskellPackages.ghcWithPackages (hpkgs: deps hpkgs);
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in
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pkgs.stdenv.mkDerivation {
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name = name;
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buildInputs = [ ];
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srcs = srcs;
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buildPhase = ''
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${ghc}/bin/ghc -Wall Main.hs ${pkgs.lib.concatMapStrings (x: "-X${x} ") ghcExtensions}
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'';
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installPhase = ''
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mkdir -p $out && mv Main $out/${name}
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'';
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};
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}
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