using zplug in zsh

.zshrc

if [[ ! -d ~/.zplug ]];then
  git clone https://github.com/zplug/zplug ~/.zplug
fi
source ~/.zplug/init.zsh
zplug "plugins/git", from:oh-my-zsh
zplug "plugins/git", from:oh-my-zsh
zplug "plugins/sudo", from:oh-my-zsh
zplug "plugins/command-not-found", from:oh-my-zsh
zplug "zsh-users/zsh-syntax-highlighting"
zplug "zsh-users/zsh-history-substring-search"
zplug "zsh-users/zsh-completions"
zplug "themes/robbyrussell", from:oh-my-zsh, as:theme
if ! zplug check --verbose; then
    printf "Install? [y/N]: "
    if read -q; then
        echo; zplug install
    fi
fi
zplug load --verbose