[Note] How to create a Ruby development environment

How to do if MacOS is Mojave or earlier

Install rbenv and ruby-build

Terminal


$ brew install rbenv ruby-build

Make rbenv available from any directory

Terminal


$ echo 'eval "$(rbenv init -)"' >> ~/.bash_profile

Note that bash_profile differs depending on whether the Mac OS version is Catalina or earlier than Mojave.

Reflect changes in bash file

Terminal


$ source ~/.bash_profile

Install readline

Terminal


$ brew install readline

realine allows you to input Japanese on the terminal

Make readline available from anywhere

Terminal


$ brew link readline --force

Install Ruby using rbenv

It takes time to process

Terminal


$ RUBY_CONFIGURE_OPTS="--with-readline-dir=$(brew --prefix readline)"
$ rbenv install 2.5.1

Specify the version used by Ruby

Terminal


$ rbenv global 2.5.1

Load rbenv and reflect the settings

Terminal


$ rbenv rehash

Check Ruby version

Terminal


$ ruby -v

Success if version is displayed

MySQL installation

Terminal


$ brew install [email protected]

MySQL auto-configuration

Set MySQL to start automatically when you start your PC

Terminal


$ mkdir ~/Library/LaunchAgents 
$ ln -sfv /usr/local/opt/mysql\@5.6/*.plist ~/Library/LaunchAgents
$ launchctl load ~/Library/LaunchAgents/homebrew.mxcl.mysql\@5.6.plist 

Allow MySQL to be operated from anywhere

Terminal


#Allows you to execute mysql commands
$ echo 'export PATH="/usr/local/opt/[email protected]/bin:$PATH"' >> ~/.bash_profile
$ source ~/.bash_profile
#Check if you can type mysql command
$ which mysql
#Success if the following is displayed
/usr/local/opt/[email protected]/bin/mysql

Preparing for Ruby on Rails

Install bundler

Terminal


$ gem install bundler

bundler is for managing gem which is an extension of Rails.

Rails installation

Terminal


$ gem install rails --version='5.2.3'

Reload rbenv

Terminal


$ rbenv rehash

Check if it was introduced

Terminal


$ rails -v

If the version is displayed, the installation is successful.

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