Add Homebrew instructions for ZSH

HeroicEric · HeroicEric · commit ef36046e93c7 · 2019-06-06T14:56:09.000-07:00
Adds instructions for adding asdf to your shell when using zsh and Homebrew. This was mostly copied from asdf-vm#496
diff --git a/docs/core-manage-asdf-vm.md b/docs/core-manage-asdf-vm.md
@@ -66,11 +66,25 @@ If you are using a framework, such as oh-my-zsh, use these lines. (Be sure
 that if you make future changes to .zshrc these lines remain _below_ the line
 where you source your framework.)
 
+Installation via **Git**:
+
 ```shell
 echo -e '\n. $HOME/.asdf/asdf.sh' >> ~/.zshrc
 echo -e '\n. $HOME/.asdf/completions/asdf.bash' >> ~/.zshrc
 ```
 
+Installation via **Homebrew**:
+
+?> If you have Homebrew's ZSH completions configured, the second line below is
+unnecessary. See [Configuring Completions in
+ZSH](https://docs.brew.sh/Shell-Completion#configuring-completions-in-zsh) in
+the Homebrew docs.
+
+```bash
+echo -e '\n. $(brew --prefix asdf)/asdf.sh' >> ~/.zshrc
+echo -e '\n. $(brew --prefix asdf)/etc/bash_completion.d/asdf.bash' >> ~/zshrc.
+```
+
 If you are not using a framework, or if on starting your shell you get an
 error message like 'command not found: compinit', then add this line before
 the ones above.
