When you add new dotfiles in this repository, execute ./setup.sh to create Symbolic links at your home directory.
% ./setup.sh
# install
% brew bundle --no-lock
# dump
% brew bundle dump -f && sed -i '' '/^vscode/d' Brewfile
Install gem-src
% git clone https://github.com/amatsuda/gem-src.git "$(rbenv root)/plugins/gem-src"