「✨」 feat(templates): new haskell template using haskell-flake

templates/haskell/.gitignore

@@ -1,2 +1,3 @@
 .direnv
 result
+dist-newstyle

templates/haskell/example.cabal

@@ -0,0 +1,76 @@
+cabal-version:      3.4
+-- The cabal-version field refers to the version of the .cabal specification,
+-- and can be different from the cabal-install (the tool) version and the
+-- Cabal (the library) version you are using. As such, the Cabal (the library)
+-- version used must be equal or greater than the version stated in this field.
+-- Starting from the specification version 2.2, the cabal-version field must be
+-- the first thing in the cabal file.
+
+-- Initial package description 'todo-list' generated by
+-- 'cabal init'. For further documentation, see:
+--   http://haskell.org/cabal/users-guide/
+--
+-- The name of the package.
+name:               todo-list
+
+-- The package version.
+-- See the Haskell package versioning policy (PVP) for standards
+-- guiding when and how versions should be incremented.
+-- https://pvp.haskell.org
+-- PVP summary:     +-+------- breaking API changes
+--                  | | +----- non-breaking API additions
+--                  | | | +--- code changes with no API change
+version:            0.1.0.0
+
+-- A short (one-line) description of the package.
+-- synopsis:
+
+-- A longer description of the package.
+-- description:
+
+-- The license under which the package is released.
+-- license:            GPL-3.0-or-later
+
+-- The file containing the license text.
+-- license-file:       LICENSE
+
+-- The package author(s).
+author:             sh-koh
+
+-- An email address to which users can send suggestions, bug reports, and patches.
+maintainer:         [email protected]
+
+-- A copyright notice.
+-- copyright:
+build-type:         Simple
+
+-- Extra doc files to be distributed with the package, such as a CHANGELOG or a README.
+-- extra-doc-files:    CHANGELOG.md
+
+-- Extra source files to be distributed with the package, such as examples, or a tutorial module.
+-- extra-source-files:
+
+common warnings
+    ghc-options: -Wall
+
+executable todo-list
+    -- Import common warning flags.
+    import:           warnings
+
+    -- .hs or .lhs file containing the Main module.
+    main-is:          Main.hs
+
+    -- Modules included in this executable, other than Main.
+    -- other-modules:
+
+    -- LANGUAGE extensions used by modules in this package.
+    -- other-extensions:
+
+    -- Other library packages from which modules are imported.
+    build-depends:    base ^>=4.18.2.1
+
+    -- Directories containing source files.
+    hs-source-dirs:   src
+
+    -- Base language which the package is written in.
+    default-language: Haskell2010

templates/haskell/flake.nix

@@ -3,35 +3,43 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
-    flake-parts.url = "github:hercules-ci/flake-parts";
+    haskell-flake.url = "github:srid/haskell-flake";
+    flake-parts = {
+      url = "github:hercules-ci/flake-parts";
+      inputs.nixpkgs-lib.follows = "nixpkgs";
+    };
   };
 
-  outputs =
-    inputs:
-    inputs.flake-parts.lib.mkFlake { inherit inputs; } {
-      systems = inputs.nixpkgs.lib.systems.flakeExposed;
-      perSystem =
-        { pkgs, ... }:
-        {
-          devShells.default = pkgs.mkShell { packages = with pkgs; [ ghc ]; };
-          packages.default = pkgs.stdenv.mkDerivation (
-            finalAttrs:
-            let
-              pname = "haskell-template";
-            in
-            {
-              inherit pname;
-              version = "git";
-              src = ./.;
-              buildInputs = with pkgs; [ ghc ];
-              nativeBuildInputs = with pkgs; [ ];
-              buildPhase = ''
-                mkdir -p $out/bin
-                ${pkgs.ghc}/bin/ghc src/Main.hs -o ${pname}
-                cp ${pname} $out/bin/${pname}
-              '';
-            }
-          );
-        };
-    };
+  outputs = inputs:
+    inputs.flake-parts.lib.mkFlake { inherit inputs; }
+      {
+        imports = [
+          inputs.haskell-flake.flakeModule
+        ];
+
+        systems = inputs.nixpkgs.lib.systems.flakeExposed;
+
+        perSystem = { pkgs, self', ... }:
+          {
+            packages.default = self'.packages.package; # TODO: replace with package name
+            haskellProjects.default = {
+              basePackages = pkgs.haskellPackages;
+              packages = {
+                # Dependencies
+                # aeson.source = "1.5.0.0";
+              };
+              settings = {
+                # Settings for dependecies
+                # aeson = {
+                #   check = false;
+                # };
+              };
+              devShell = {
+                enable = true;
+                # tools = hp: { cabal = hp.cabal; };
+                hlsCheck.enable = false;
+              };
+            };
+          };
+      };
 }

templates/haskell/src/Main.hs

@@ -0,0 +1,5 @@
+module Main where
+
+main :: IO ()
+main = do 
+  putStrLn "New haskell project!"