Setting up nix is optional for example apps (#138)

* Setting up nix is optional

* refactor nix set up

---------

Co-authored-by: Collins Muriuki <[email protected]>

src/cli.rs

@@ -215,6 +215,10 @@ pub enum HcScaffoldCommand {
  /// Name of the example to scaffold. One of ['hello-world', 'forum'].
  example: Option<Example>,
 
+ #[structopt(long)]
+ /// Whether to setup the holonix development environment for this web-app
+ setup_nix: Option<bool>,
+
  /// The package manager to use with the example
  /// Can be one of the following: "bun", "npm", "pnpm", or "yarn".
  /// When a lockfile is detected, the respective package manager will be used as the default value;
@@ -660,6 +664,7 @@ Add new collections for that entry type with:
  example,
  package_manager,
  holo_enabled,
+ setup_nix,
  } => {
  let example = match example {
  Some(e) => e,
@@ -880,10 +885,12 @@ Add new collections for that entry type with:
  build_file_tree(file_tree, &app_dir)?;
 
  // set up nix
- if let Err(err) = setup_nix_developer_environment(&app_dir) {
- fs::remove_dir_all(&app_dir)?;
- return Err(err)?;
- }
+ if let Some(true) | None = setup_nix {
+ if let Err(err) = setup_nix_developer_environment(&app_dir) {
+ fs::remove_dir_all(&app_dir)?;
+ return Err(err)?;
+ }
+ };
 
  setup_git_environment(&app_dir)?;