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ruby-on-railsrubyrbenv

How to use Ruby 2.6.6 when rbenv can't find it?

I created a new Rails app (v5.2.4.3) using Ruby 2.7.1 and discovered the blizzard of "keyword parameter" warnings endemic in this release.

rbenv install --list, for some reason, doesn't list Ruby versions beyond 2.4.0. I've manually installed 2.6.6 but am unable to launch it.

This seems like a simple problem. Hints?

Solution

  • You should firstly check the version of plugin 'ruby-build':

    cd ~/.rbenv/plugins/ruby-build
git log

    If you have not ~/.rbenv/plugins directory, maybe it is too old for the version of your rbenv. First update rbenv:

    cd ~/.rbenv
git pull

    Then install 'ruby-build' plugin:

    git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build