Update bin/theme for rails 7.1 compatibility

[pcai]

updates bin/theme to work with rails main branch. otherwise it breaks with following stacktrace when running bin/dev:

15:12:56 light-mailer-css.1 | bundler: failed to load command: bin/theme (bin/theme)
15:12:56 light-mailer-css.1 | bin/theme:36:in `select': undefined method `present?' for "/workspaces/workspace":String (NoMethodError)
15:12:56 light-mailer-css.1 | 
15:12:56 light-mailer-css.1 | @candidate_paths = [Dir.pwd, gem_path].select(&:present?)
15:12:56 light-mailer-css.1 |                                       ^^^^^^^
15:12:56 light-mailer-css.1 | Did you mean?  prepend
15:12:56 light-mailer-css.1 |   from bin/theme:36:in `<top (required)>'
15:12:56 light-mailer-css.1 |   from /usr/local/lib/ruby/3.2.0/bundler/cli/exec.rb:58:in `load'
15:12:56 light-mailer-css.1 |   from /usr/local/lib/ruby/3.2.0/bundler/cli/exec.rb:58:in `kernel_load'
15:12:56 light-mailer-css.1 |   from /usr/local/lib/ruby/3.2.0/bundler/cli/exec.rb:23:in `run'
15:12:56 light-mailer-css.1 |   from /usr/local/lib/ruby/3.2.0/bundler/cli.rb:492:in `exec'
15:12:56 light-mailer-css.1 |   from /usr/local/lib/ruby/3.2.0/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
15:12:56 light-mailer-css.1 |   from /usr/local/lib/ruby/3.2.0/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
15:12:56 light-mailer-css.1 |   from /usr/local/lib/ruby/3.2.0/bundler/vendor/thor/lib/thor.rb:392:in `dispatch'
15:12:56 light-mailer-css.1 |   from /usr/local/lib/ruby/3.2.0/bundler/cli.rb:34:in `dispatch'
15:12:56 light-mailer-css.1 |   from /usr/local/lib/ruby/3.2.0/bundler/vendor/thor/lib/thor/base.rb:485:in `start'
15:12:56 light-mailer-css.1 |   from /usr/local/lib/ruby/3.2.0/bundler/cli.rb:28:in `start'
15:12:56 light-mailer-css.1 |   from /usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.10/libexec/bundle:45:in `block in <top (required)>'

for reference see https://guides.rubyonrails.org/active_support_core_extensions.html#loading-all-core-extensions which specifically mentions that it wont load extensions unless explicitly asked to.

rails 7.0.x doesnt need this change; perhaps this was working accidentally. I haven't narrowed it down to the specific rails commit that broke it.

[gazayas]

@andrewculver Do we have a policy for updating Bullet Train to the Rails main branch as opposed to the latest released version? I personally don't think we need to worry about it until 7.1 is released.

[olbrich]

@gazayas It might be a good idea to adopt a dual-boot approach like https://github.com/Shopify/bootboot to give advance warning of problems related to impending rails upgrades.

[gazayas]

@olbrich Just wrote a note to look into bootboot, thank you!