Add zsh syntax highlighting with version checks

README.md

@@ -23,7 +23,11 @@ The directory structure is as follows:
 ## Terminal
 
 I am back to `zsh` after a long time with `bash`. See the `dotfiles/zsh` directory. You only need to 
-symlink `.zprofile` and `.zshrc` to your home directory.
+symlink `.zprofile` and `.zshrc` to your home directory. Refer to the `README.md` in the directory
+for more information.
+
+My `.zshrc` installs a lot of nice conveniences. For example, fish-shell-like syntax highlighting and
+git completion.
 
 ## Vim
 

dotfiles/zsh/zshrc

@@ -7,8 +7,6 @@ else
   symlink_dir=$(cd "$( dirname "`readlink ${(%):-%N}`" )" && pwd)
 fi
 
-# -------------------------------- SETUP -------------------------------- #
-
 # Store private information (exports, keys, etc) in .bash_private.
 if [[ -f $HOME/.bash_private ]]; then
   source $HOME/.bash_private
@@ -62,13 +60,18 @@ 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 
+  if ! is-at-least 4.3.11; then
+    echo "ZSH syntax highlighting requires ZSH >= 4.3.11 (current: $ZSH_VERSION)."
+  else
+    echo "Installing zsh syntax highlighting"
+    pushd
+    
+    cd $HOME/.zsh
+    git clone https://github.com/zsh-users/zsh-syntax-highlighting.git 
+
+    popd
+  fi
 
-  popd
 fi 
 
 zstyle ':completion:*:*:git:*' script $HOME/.zsh/git-completion.bash
@@ -86,6 +89,3 @@ source $symlink_dir/ps1.zsh
 
 # ZSH syntax highlighting must be sourced last
 source $HOME/.zsh/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh
-
-# ------------------------------ END SETUP ------------------------------ #
-