How to rebuild rdoc for all the installed gems?

I have several gems installed in multiple locations.

What is the hard/easy way to generate/re-generate:

rdoc for all these installed gems, all at once?
yardoc for all these installed gems, all at once?

Solution

yard gems

sudo yard gems

should do the job. You may also want to use the --rebuild flag. If you want to run a local Yardoc server for your installed gems, then run

yard server -g

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