$ cd ~/.rbenv
$ git pull
$ cd plugins/ruby-build/
$ git pull
$ rbenv install 2.6.0-preview1
$ cd ~/local/src/mastodon
$ rbenv local 2.6.0-preview1
$ gem install bundle
$ sed -i s/2.6.0/2.7.0/ Gemfile
$ bundle install --path=vendor/bundle
$ sed -i s/2.5.0p0/2.6.0-preview1/ Gemfile.lock
$ git checkout -b use-ruby-2.6.0
$ git commit -am 'Use Ruby 2.6.0-preview1'
$ git push -u origin use-ruby-2.6.0
:
-----> Compiling Ruby/Rails
! An error occurred while installing ruby-2.6.0-preview1
だめかーw