installohmyzsh_unattended.sh

#!/bin/bash
# install:
# curl -s https://gist.githubusercontent.com/giddyhup/7013eb8d022e0ce94d68519d3cc32f68/raw/c77828c8b53f57840ef728a9923c6db942256e89/installohmyzsh_unattended.sh | bash

usershell=$(grep $USER /etc/passwd | grep zsh)
if [[ $? == 0 ]]; then
    echo "zsh is already the user's shell, to stay on the safe side we're aborting"
    exit
fi
if sudo -n true 2>/dev/null; then 
    echo "I got sudo"
else
    read -p 'What is your password? ' sudo_password
fi
cd
sudo apt update && sudo apt -y install git zsh
curl -Lo installohmyzsh.sh https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh
sh installohmyzsh.sh --unattended
mv .zshrc .zshrc.dist
echo "PATH=\"\$HOME/.local/bin:\$HOME/bin:\$PATH\"" > .zshrc
echo "export DISPLAY=:0" >> .zshrc
echo "export ZSH=$HOME/.oh-my-zsh" >> .zshrc
echo "ZSH_THEME=\"fishy\"" >> .zshrc
echo "DISABLE_AUTO_TITLE=\"true\"" >> .zshrc
echo "ENABLE_CORRECTION=\"true\"" >> .zshrc
echo "COMPLETION_WAITING_DOTS=\"true\"" >> .zshrc
echo "plugins=(git compleat)" >> .zshrc
echo "source \$ZSH/oh-my-zsh.sh" >> .zshrc
echo "case \$TERM in" >> .zshrc
echo "    xterm*)" >> .zshrc
echo "        precmd () {print -Pn \"\\e]0;\$USER@\$HOST: \$PWD\a\"}" >> .zshrc
echo "       ;;" >> .zshrc
echo "esac" >> .zshrc

if sudo -n true 2>/dev/null; then 
    sudo chsh -s "$(which zsh)" "${USER}"
else
    sudo -S chsh -s "$(which zsh)" "${USER}" <<< "${sudo_password}"
fi


echo "If everything went OK, zsh and oh-my-zsh are installed and set as default shell."