feat(devshell): Add Nix devshell and update direnv to use nix-direnv 2.0.0

Author: PetarKirov

Diff for: .envrc

@@ -1,7 +1,9 @@
-use_flake() {
-  watch_file flake.nix
-  watch_file flake.lock
-  eval "$(nix print-dev-env --profile "$(direnv_layout_dir)/flake-profile")"
-}
+# shellcheck shell=bash
 
+if ! has nix_direnv_version || ! nix_direnv_version 2.0.0; then
+  source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.0.0/direnvrc" "sha256-gMHKKyEOq/T0XmHKgz+pN+fUQC/1EKPAuOtYM95lLnU="
+fi
+
+dotenv_if_exists
+nix_direnv_watch_file shell.nix
 use flake

Diff for: .gitignore

@@ -1,2 +1,5 @@
 # Nix build artifacts
 result
+
+# Direnv
+.direnv

Diff for: flake.nix

@@ -36,6 +36,8 @@
     defaultUser = "zlx";
     users = [defaultUser];
 
+    pkgs = nixpkgs.legacyPackages.${system};
+
     machines = builtins.attrNames (
       nixpkgs.lib.filterAttrs
       (n: v: v == "directory")
@@ -85,5 +87,6 @@
     nixosConfigurations = builtins.listToAttrs (builtins.map (makeMachineConfig defaultUser) machines);
     homeConfigurations = builtins.listToAttrs (builtins.map makeHomeConfig users);
     nixOnDroidConfigurations = {device = makeNixOnDroidConfig defaultUser;};
+    devShells."${system}".default = import ./shell.nix { inherit pkgs; };
   };
 }

Diff for: shell.nix

@@ -0,0 +1,14 @@
+{ pkgs }: with pkgs;
+mkShell {
+  buildInputs = [
+    figlet
+  ];
+
+  shellHook = ''
+    local remote_url="$(git config --get remote.origin.url)"
+    project_path=$(echo "$remote_url" | sed -E 's"(git@|.+://)[^:/]+[:/](.+)/.+$"\2"')
+    repo_name=$(echo "$remote_url" | sed -E -e 's|.+/(.+)$|\1|' -e 's|(.+)(.git)$|\1|')
+
+    figlet "Welcome to $project_path's $repo_name"
+  '';
+}