rbenv - Ruby 版本管理工具

# Clone rbenv into ~/.rbenv
git clone https://github.com/rbenv/rbenv.git ~/.rbenv

# Optionally, try to compile dynamic bash extension to speed up rbenv. Don't worry if it fails; rbenv will still work normally
$ cd ~/.rbenv && src/configure && make -C src

$ vim ~/.zshrc
export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"

# Verify that rbenv is properly set up using this rbenv-doctor script:
$ curl -fsSL https://github.com/rbenv/rbenv-installer/raw/master/bin/rbenv-doctor | bash

# As an rbenv plugin
mkdir -p "$(rbenv root)"/plugins
git clone https://github.com/rbenv/ruby-build.git "$(rbenv root)"/plugins/ruby-build

# list all available versions
rbenv install -l

# install a Ruby version
rbenv install 2.5.1

# list all installed Ruby versions
rbenv versions

# list current Ruby version
rbenv version

# set global version of Ruby to be used in all shells by writing the version name to the `~/.rbenv/version` file
rbenv global 2.5.1

# reports the currently configured global version
rbenv global

# set a local application-specific Ruby version by writing the version name to a .ruby-version file in the current directory
rbenv local 2.5.1

# set a shell-specific Ruby version
rbenv shell 2.5.1

# install Ruby gems
gem install bundler