Add automatic install of zsh syntax highlighting

dotfiles/zsh/zshrc

@@ -50,14 +50,27 @@ fi
 if [[ ! -d $HOME/.zsh ]]; then
   echo "Installing zsh git completion scripts"
   mkdir -p $HOME/.zsh
+  pushd
+  
   cd $HOME/.zsh
 
   curl -o git-completion.bash https://raw.githubusercontent.com/git/git/master/contrib/completion/git-completion.bash
   curl -o _git https://raw.githubusercontent.com/git/git/master/contrib/completion/git-completion.zsh
 
-  cd $HOME
+  popd
 fi
 
+# Install zsh-syntax-highlighting if it doesn't exist
+if [[ ! -d $HOME/.zsh/zsh-syntax-highlighting ]]; then 
+  echo "Installing zsh syntax highlighting"
+  pushd
+  
+  cd $HOME/.zsh
+  git clone https://github.com/zsh-users/zsh-syntax-highlighting.git 
+
+  popd
+fi 
+
 zstyle ':completion:*:*:git:*' script $HOME/.zsh/git-completion.bash
 fpath=(~/.zsh $fpath)
 
@@ -71,5 +84,8 @@ source $symlink_dir/exports.zsh
 source $symlink_dir/initializations.zsh
 source $symlink_dir/ps1.zsh
 
+# ZSH syntax highlighting must be sourced last
+source $HOME/.zsh/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh
+
 # ------------------------------ END SETUP ------------------------------ #