If rails new fails, created files are not removed

[louis-antonopoulos]

When running rails new, if an error is encountered, all the files that are created are not removed, including databases.

Related: can any known requirements (such as the Node version) be checked before starting?

rails new my-app-name \
 --skip_rubocop \
 --skip-test \
 -d=postgresql \
 -m=https://raw.githubusercontent.com/thoughtbot/suspenders/main/lib/install/web.rb

Example error:

The template [https://raw.githubusercontent.com/thoughtbot/suspenders/main/lib/install/web.rb] could not be loaded. Error: 

=== Node version unsupported ===

Suspenders requires Node >= 20.0.0

[stevepolitodesign]

Noting, this also applies to cases where the wrong arguments are not passed:

suspenders/lib/install/web.rb

Lines 42 to 66 in 3bc560e

	else
	message = <<~ERROR
	=== Please use the correct options ===
	# Use the latest suspenders release:
	rails new <app_name> \\
	--skip-rubocop \\
	--skip-test \\
	-d=postgresql \\
	-m=https://raw.githubusercontent.com/thoughtbot/suspenders/main/lib/install/web.rb
	# OR use the current (possibly unreleased) `main` branch of suspenders:
	rails new <app_name> \\
	--suspenders-main \\
	--skip-rubocop \\
	--skip-test \\
	-d=postgresql \\
	-m=https://raw.githubusercontent.com/thoughtbot/suspenders/main/lib/install/web.rb
	ERROR
	fail Rails::Generators::Error, message
	end