Add shell.nix and direnv

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -5,3 +5,4 @@ tramp
 .\#*
 result
 *\.qcow2
+.direnv

flake.lock

@@ -86,6 +86,22 @@
         "type": "github"
       }
     },
+    "flake-compat_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1606424373,
+        "narHash": "sha256-oq8d4//CJOrVj+EcOaSXvMebvuTkmBJuT5tzlfewUnQ=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "99f1c2157fba4bfe6211a321fd0ee43199025dbf",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
     "haskell-nix": {
       "locked": {
         "lastModified": 1587989559,
@@ -369,6 +385,7 @@
         "NUR": "NUR",
         "base16-unclaimed-schemes": "base16-unclaimed-schemes",
         "deploy-rs": "deploy-rs",
+        "flake-compat": "flake-compat_2",
         "home-manager": "home-manager",
         "lambda-launcher": "lambda-launcher",
         "materia-theme": "materia-theme",

flake.nix

@@ -7,6 +7,10 @@
     # nixpkgs-mesa.url = github:nixos/nixpkgs-channels/bdac777becdbb8780c35be4f552c9d4518fe0bdb;
     lambda-launcher.url = "github:balsoft/lambda-launcher";
     deploy-rs.url = "github:serokell/deploy-rs";
+    flake-compat = {
+      url = "github:edolstra/flake-compat";
+      flake = false;
+    };
     NUR = {
       url = "github:nix-community/NUR";
       flake = false;
@@ -74,6 +78,15 @@
 
     defaultApp = deploy-rs.defaultApp;
 
+    devShell.x86_64-linux = with nixpkgs.legacyPackages.x86_64-linux;
+      mkShell {
+        buildInputs = [
+          nix.defaultPackage.x86_64-linux
+          deploy-rs.defaultPackage.x86_64-linux
+          nixfmt
+        ];
+      };
+
     deploy = {
       user = "root";
       nodes.T420-Laptop = {

shell.nix

@@ -0,0 +1,13 @@
+(import
+  (
+    let
+      lock = builtins.fromJSON (builtins.readFile ./flake.lock);
+    in
+    fetchTarball {
+      url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
+      sha256 = lock.nodes.flake-compat.locked.narHash;
+    }
+  )
+  {
+    src = ./.;
+  }).shellNix