Complains that rubocop is not installed when bundling with --path

[imtayadeway]

I'd noticed that flycheck hasn't been giving me rubocop feedback for a while. Just tracked this down - it's because when I bundle install I use the --path flag to put my gems in vendor/bundle. Hence, if I want to run the executable rubocop in my project I have to run bundle exec rubocop. rubocop mode doesn't know this, however, and will simply not run with flycheck. Only on invoking something like M-x rubocop-check-current-file will it complain that rubocop is not installed.

I realized that I can work around this by installing rubocop using my current Ruby with gem install rubocop i.e. outside of bundler. Of course, I would have preferred it if it had Just Worked.

If this seems like an issue you'd like addressed I'd be happy to tackle it. Thanks!

[imtayadeway]

@bbatsov anything I can do to help bring this to some resolution?

[bbatsov]

Won't customising rubocop-check-command solve your problem? You can set it via a .dir-locals.el file just for the projects you want to use bundle exec rubocop.

[imtayadeway]

I have tried playing around with that before. Adding it now (and removing the rubocop gem and hence executable from my PATH) results in "RuboCop is not installed" when invoking rubocop-check-current-file, etc., however I can bundle exec rubocop in my shell successfully. Doing M-: rubocop-check-command reveals that I have set it correctly and displays bundle exec rubocop

[bbatsov]

Maybe exec-path is not properly set in Emacs. See if you can run bundle exec rubocop from M-!. If not, you can take a look at exec-path-from-shell https://github.com/purcell/exec-path-from-shell.

[imtayadeway]

That works as expected - I'm using exec-path-from-shell

[edebill]

I have rubocop installed to /usr/local/bin on my El Capitan Mac (installed with rvm use system; sudo gem install rubocop).

I persistently get this problem. I fixed it with:

(require 'rubocop)
(setq rubocop-check-command "/usr/local/bin/rubocop --format emacs")
(defun rubocop-ensure-installed () )

[imtayadeway]

@bbatsov it looks like this function is short-circuiting some of the commands because it explicitly can't find rubocop in exec-path. Is there any way this could be changed to optionally check if rubocop has been bundled?

[bbatsov]

We can always check the command to do both checks. PRs welcome. :-)

[imtayadeway]

@bbatsov thanks! I will try to tackle this in the coming week