feat: Nix flake template with devenv

docs/NIX.md

@@ -9,20 +9,24 @@
 ## Project Structure
 
 The project uses:
+
 - Nix Flakes for reproducible builds and development environments
 - `stacklock2nix` for deriving Nix packages from stack.yaml.lock
 - `devenv` for creating consistent development environments
 
 ### Flake.nix
 
 The flake.nix file has the following inputs:
+
 - `nixpkgs`: Standard Nix packages repository
 - `stacklock2nix`: A tool for generating Nix packages from stack.yaml.lock files
 
 The flake outputs:
+
 - `packages.default`: The Hapistrano package for each supported system
 - `overlays.default`: An overlay for integrating Hapistrano into other Nix
   systems
+- `templates.default`: A template showing how to install Hapistrano using devenv
 
 ## Development Environments
 

flake.nix

@@ -50,5 +50,9 @@
       overlays.default = final: prev: {
         hapistrano = self.packages.${prev.system}.default;
       };
+      templates.default = {
+        description = "Install Hapistrano using devenv";
+        path = ./templates/default;
+      };
     };
 }

templates/.gitignore

@@ -0,0 +1 @@
+devenv.lock

templates/default/.envrc

@@ -0,0 +1,5 @@
+export DIRENV_WARN_TIMEOUT=20s
+
+eval "$(devenv direnvrc)"
+
+use devenv

templates/default/.gitignore

@@ -0,0 +1,9 @@
+# Devenv
+.devenv*
+devenv.local.nix
+
+# direnv
+.direnv
+
+# pre-commit
+.pre-commit-config.yaml

templates/default/devenv.nix

@@ -0,0 +1,10 @@
+{ pkgs, ... }:
+
+{
+  packages = [ pkgs.hapistrano ];
+
+  cachix = {
+    enable = true;
+    pull = [ "stackbuilders" ];
+  };
+}

templates/default/devenv.yaml

@@ -0,0 +1,8 @@
+# yaml-language-server: $schema=https://devenv.sh/devenv.schema.json
+inputs:
+  nixpkgs:
+    url: github:cachix/devenv-nixpkgs/rolling
+  hapistrano:
+    url: github:stackbuilders/hapistrano
+    overlays:
+      - default