Improved zsh installation steps

zsh/install.sh

@@ -1,17 +1,39 @@
 #!/bin/bash
-echo " - Installing Zsh - "
-sudo apt-get install zsh
+echo "🤔 Checking for Zsh installation"
+if zsh --version; then
+  echo "🥰 Zsh is already installed"
+else
+  echo "🤩 Installing Zsh"
+  sudo apt-get install zsh
+  echo "👍 Zsh Installed"
+fi
 
-echo " - Setting Zsh as default - "
+echo "🦄 Setting Zsh as default shell"
 sudo chsh -s /usr/bin/zsh
+echo "👍 Zsh set as default shell, will take effect next time you log in (or type zsh into your terminal)"
 
-echo " - Installing oh-my-zsh - "
-sh -c "$(curl -fsSL https://raw.github.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"
+echo "🤔 Checking for oh-my-zsh installation"
+if [ -d ~/.oh-my-zsh ]; then
+  echo "🥰 oh-my-zsh is already installed"
+else
+  echo "🤩 Installing oh-my-zsh"
+  sh -c "$(curl -fsSL https://raw.github.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"
+  echo "👍 oh-my-zsh Installed"
+fi
 
-echo " - Setting oh-my-zsh theme -"
+echo "🤔 Checking for zsh-autosuggestions installation"
+if [ -d ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-autosuggestions ]; then
+  echo "🥰 zsh-autosuggestions is already installed"
+else
+  echo "🤩 Installing zsh-autosuggestions"
+  git clone https://github.com/zsh-users/zsh-autosuggestions ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-autosuggestions
+  sed -ri 's/plugins=\((.*?)\)/plugins=\(git zsh-autosuggestions\)/g' ~/.zshrc
+  echo "👍 zsh-autosuggestions Installed"
+fi
+
+echo "🦄 Setting oh-my-zsh theme"
 sed -ri 's/ZSH_THEME="(.*?)"/ZSH_THEME="kardan"/g' ~/.zshrc
-source ~/.zshrc
+echo "👍 Set oh-my-zsh theme"
 
-echo " - Setting up Zsh Plugins - "
-git clone https://github.com/zsh-users/zsh-autosuggestions ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-autosuggestions
-sed -ri 's/plugins=\((.*?)\)/plugins=\(git zsh-autosuggestions\)/g' ~/.zshrc
+source ~/.zshrc
+echo "👍 Sourced updated zshrc"