add vscodeEnv to shell.nix

.gitignore

@@ -22,3 +22,7 @@ cabal.project.local~
 .HTF/
 .ghc.environment.*
 .directory
+.vscode-exts/
+.vscode-globalUserData/
+.vscode/
+mutable-extensions.nix

default.nix

@@ -1,10 +1,9 @@
-let
-  ghcVersion = "ghc865";
-  misoPkgs = import (builtins.fetchTarball {
+{ ghcVersion ? "ghc865"
+, misoPkgs ? import (builtins.fetchTarball {
     url = "https://github.com/dmjio/miso/archive/561ffad.tar.gz";
     sha256 = "1wwzckz2qxb873wdkwqmx9gmh0wshcdxi7gjwkba0q51jnkfdi41";
-  }) {};
-in
+  }) {}
+}:
 
 with misoPkgs.pkgs;
 with haskell.packages."${ghcVersion}";

shell.nix

@@ -1,9 +1,43 @@
-let pkgs = import <nixpkgs> { };
-in (import ./.).env.overrideAttrs (_: {
+{ ps ? import <nixpkgs> {}
+, nixpkgs ?  import (ps.fetchFromGitHub {
+    owner = "NixOS";
+    repo = "nixpkgs";
+    rev = "f75d62941d8ad616bfc334ae19d71a0a6677dd19";
+    sha256 = "0n88r4fw1syad9zl7r40r7xlxwx38ni8s9hzyayxssr21ii2p38h";
+}) {}
+, ghcVersion ? "ghc865"
+}:
+with nixpkgs;
+let
+  drv = import ./. { inherit ghcVersion;};
+  hie = 
+    ((import (fetchTarball "https://github.com/infinisil/all-hies/tarball/master") {})
+    .selection { selector = p: { ${ghcVersion} = p.${ghcVersion}; }; });
+
+in 
+drv.env.overrideAttrs (shellEnv: {
+  buildInputs = shellEnv.buildInputs ++ [
+    cabal2nix
+    hie
+    (vscode-utils.vscodeEnv {
+      #usually this path go to tmp but feel free to change it wherever you think it is good place to the "fake" global folder
+      #putting it on empty string will leave the default one.
+      user-data-dir = "./.vscode-globalUserData";
+      #this file will be updated/created automaticly by vscode in result of using vscode GUI to install/uninstall extensions(can be changed manually to)
+      mutableExtensionsFile = ./mutable-extensions.nix;
+      #this extensions will be stored in the nix store and cannot be modified from vscode GUI
+      nixExtensions = [
+        { name = "vscode-hie-server"; publisher = "alanz"; version = "0.0.40"; sha256 = "1cmlgidjma41s5zq5161gcxxmk5lfzcm8dvznls04y5l7q9b0gca";  }
+        { name = "language-haskell"; publisher = "justusadam"; version = "3.2.0"; sha256 = "190h1hky2yy5n00ncqf15mmaizgpm3w9pzvasmi2gangpg4qb6y5";  }
+      ];
+
+      # configuration for settings files- those will be overrides/create over the one in .vscode folder
+      # settings = {};
+      # keybindings ={};
+    })
+  ];
+
   shellHook = ''
-    PATH="$PATH:${pkgs.ghc}/bin:${pkgs.cabal-install}/bin:${pkgs.nwjs-sdk}/bin:${pkgs.ghcid}/bin:${
-      ((import
-        (fetchTarball "https://github.com/infinisil/all-hies/tarball/master")
-        { }).selection { selector = p: { inherit (p) ghc865; }; })
-    }/bin"'';
-})
+    echo 'to start editor with HIE run on the root of the folder: code .'
+  '';
+})