A very inmature exploration of #38

flake.nix

@@ -8,23 +8,25 @@
       home.url = "github:nix-community/home-manager/release-20.09";
       flake-utils.url = "github:numtide/flake-utils";
       devshell.url = "github:numtide/devshell";
+      naersk.url = "github:nmattia/naersk";
+      mozilla-overlay = { url = "github:mozilla/mozilla-nixpkgs"; flake = false; };
     };
 
-  outputs = inputs@{ self, home, nixos, master, flake-utils, nur, devshell }:
+  outputs = inputs@{ self, home, nixos, master, flake-utils, nur, devshell, naersk, mozilla-overlay }:
     let
       inherit (builtins) attrNames attrValues readDir elem pathExists filter;
       inherit (flake-utils.lib) eachDefaultSystem mkApp;
       inherit (nixos) lib;
       inherit (lib) all removeSuffix recursiveUpdate genAttrs filterAttrs
         mapAttrs;
       inherit (utils) pathsToImportedAttrs genPkgset overlayPaths modules
-        genPackages pkgImport;
+        genPackages pkgImport devshells;
 
       utils = import ./lib/utils.nix { inherit lib; };
 
       system = "x86_64-linux";
 
-      externOverlays = [ nur.overlay devshell.overlay ];
+      externOverlays = [ nur.overlay devshell.overlay (import mozilla-overlay) naersk.overlay];
       externModules = [ home.nixosModules.home-manager ];
 
       pkgset =
@@ -45,6 +47,8 @@
 
         nixosModules = modules;
 
+        devshellModules = devshells;
+
         templates.flk.path = ./.;
 
         templates.flk.description = "flk template";

lib/utils.nix

@@ -82,6 +82,13 @@ in
       (recursiveUpdate cachixAttrs modulesAttrs)
       profilesAttrs;
 
+  devshells =
+    let
+      # shells
+      shellList = import ../shells/list.nix;
+    in
+    pathsToImportedAttrs shellList;
+
   genPackages = { overlay, overlays, pkgs }:
     let
       packages = overlay pkgs pkgs;

shell.nix

@@ -30,6 +30,10 @@ let
   name = "flk";
 in
 pkgs.mkDevShell {
+
+  imports  = [ (import ./shells/rust) ];
+  nixflk.rust.enable = true;
+
   inherit name;
 
   packages = with pkgs; with installPkgs; [

shells/list.nix

@@ -0,0 +1,3 @@
+[
+  ./rust
+]

shells/rust/default.nix

@@ -0,0 +1,32 @@
+{ config, lib, ... }: {
+  options.nixflk.rust = {
+    enable = lib.mkEnableOption "nixflk.rust";
+    openssl = lib.mkEnableOption "nixflk.rust.openssl";
+  };
+  config = lib.optionalAttrs nixflk.rust.enable {
+    name = "Nixflk Rust DevShell";
+
+    packages = [
+      latest.rustChannels.stable.rust
+      wasm-bindgen-cli
+      binaryen
+
+      ncurses
+      pkgconfig
+    ] ++ lib.mkIf options.nixflk.rust.openssl [
+    openssl
+    openssl.dev
+    ];
+
+    env.RUST_BACKTRACE = "1";
+
+    commands = [
+      {
+        name = "hello";
+        help = "say hello";
+        category = "fun";
+        command = "echo '''hello''' ";
+      }
+    ];
+  };
+}