osx

Recently I have had to take the time to fix failed installations of Ruby libraries which build C extensions on Mojave in multiple development environments and across multiple versions of Ruby. The solution(s) are in the end thankfully quite straightforward.

A recurring issue with running a Ruby development environment on OSX is integrations with external libraries, particularly readline. As various elements of the setup evolve (e.g. OSX, Homebrew, Ruby, rbenv) breakage occurs which causes development time to be spent debugging basic machine issues. The relevant error message and failure, issued by byebug was: Sorry, you can't use byebug without Readline. To solve this, you need to rebuild Ruby with Readline support.

TLDR

brew cask install macvim