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authorVincent Ambo <mail@tazj.in>2021-12-13T22·51+0300
committerVincent Ambo <mail@tazj.in>2021-12-13T23·15+0300
commit019f8fd2113df4c5247c3969c60fd4f0e08f91f7 (patch)
tree76a857f61aa88f62a30e854651e8439db77fd0ea /users/wpcarro/buildHaskell
parent464bbcb15c09813172c79820bcf526bb10cf4208 (diff)
parent6123e976928ca3d8d93f0b2006b10b5f659eb74d (diff)
subtree(users/wpcarro): docking briefcase at '24f5a642' r/3226
git-subtree-dir: users/wpcarro
git-subtree-mainline: 464bbcb15c09813172c79820bcf526bb10cf4208
git-subtree-split: 24f5a642af3aa1627bbff977f0a101907a02c69f
Change-Id: I6105b3762b79126b3488359c95978cadb3efa789
Diffstat (limited to 'users/wpcarro/buildHaskell')
-rw-r--r--users/wpcarro/buildHaskell/default.nix31
1 files changed, 31 insertions, 0 deletions
diff --git a/users/wpcarro/buildHaskell/default.nix b/users/wpcarro/buildHaskell/default.nix
new file mode 100644
index 000000000000..5958b1ea26ae
--- /dev/null
+++ b/users/wpcarro/buildHaskell/default.nix
@@ -0,0 +1,31 @@
+{ pkgs, ... }:
+
+{
+  # Create a nix-shell for Haskell development.
+  shell = { deps }: let
+    ghc = pkgs.haskellPackages.ghcWithPackages (hpkgs: deps hpkgs);
+  in pkgs.mkShell {
+    buildInputs = [ghc];
+  };
+
+  # Build a Haskell executable. This assumes a project directory with a
+  # top-level Main.hs.
+  # - `name`: You can find the result at ./result/$name
+  # - `srcs`: Will be passed to `srcs` field of `pkgs.stdenv.mkDerivation`.
+  # - `deps`: A function that accepts `hpkgs` and returns a list of Haskell
+  # - `ghcExtensions`: A list of strings representing the language extensions to
+  #   use.
+  program = { name, srcs, deps, ghcExtensions }: let
+    ghc = pkgs.haskellPackages.ghcWithPackages (hpkgs: deps hpkgs);
+  in pkgs.stdenv.mkDerivation {
+    name = name;
+    buildInputs = [];
+    srcs = srcs;
+    buildPhase = ''
+      ${ghc}/bin/ghc -Wall Main.hs ${pkgs.lib.concatMapStrings (x: "-X${x} ") ghcExtensions}
+    '';
+    installPhase = ''
+      mkdir -p $out && mv Main $out/${name}
+    '';
+  };
+}