shell.sh

#!/bin/bash

setup_shell_choice() {
  # ~/.zshrc, etc.
  if [ ! -d "$HOME/.zsh" ]
  then
      echo "Setting up 'Oh My Zsh' shell preference"
      brew install zsh

      # Install Oh-My-ZSH
      sh -c "$(curl -fsSL https://raw.github.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"

      # Install ZSH additions
      brew install zsh-completions zsh-syntax-highlighting

      # Install ZSH themes
      git clone https://github.com/romkatv/powerlevel10k.git $ZSH_CUSTOM/themes/powerlevel10k

      # Post setup configurations
      echo 'export PATH="/usr/local/opt/gnu-getopt/bin:$PATH"' >> ~/.zshrc
      echo 'export ZSH_HIGHLIGHT_HIGHLIGHTERS_DIR=/usr/local/share/zsh-syntax-highlighting/highlighters' >> ~/.zshenv
      echo 'source /usr/local/share/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh' >> ~/.zshrc

      # Install groups of command overrides
      cat << EOF >> ~/.zshrc
      # Color highlighting
      alias ls='ls --color=auto'
      alias grep='grep --color=auto'
      alias fgrep='fgrep --color=auto'
      alias egrep='egrep --color=auto'
      alias diff='diff --color=auto'
      
      # Color Man pages
      export LESS_TERMCAP_mb=$'\e[1;32m'
      export LESS_TERMCAP_md=$'\e[1;32m'
      export LESS_TERMCAP_me=$'\e[0m'
      export LESS_TERMCAP_se=$'\e[0m'
      export LESS_TERMCAP_so=$'\e[01;33m'
      export LESS_TERMCAP_ue=$'\e[0m'
      export LESS_TERMCAP_us=$'\e[1;4;31m'

      # Color common commands
      command -v lsd > /dev/null && alias ls='lsd --group-dirs first'
      command -v lsd > /dev/null && alias tree='lsd --tree'
      
      # Additional aliases
      command -v htop > /dev/null && alias top='htop'
      EOF

      # Make it your default shell
      chsh -s $(which zsh)
  else
      echo "You're already using Zsh shell."
      ${SHELL} --version
  fi
  
  # .gitconfig
  if [ ! -f "$HOME/.gitconfig" ]
  then
      touch ~/.gitconfig
  fi

  if [ -f "$HOME/.gitconfig" ]
  then
      cat << EOF >> ~/.gitconfig
      [color] # colorize output
          diff = auto
          status = auto
          branch = auto
          interactive = auto
          ui = true
          pager = true
      [credential] # cache credentials
          helper = cache --timeout=3600
      EOF
  fi
}

setup_shell_choice