Add Configure Brew Environment Variables as a Brew TIL

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1388 TILs and counting..._
+_1389 TILs and counting..._
 
 ---
 
@@ -19,6 +19,7 @@ _1388 TILs and counting..._
 * [Ack](#ack)
 * [Amplify](#amplify)
 * [Ansible](#ansible)
+* [Brew](#brew)
 * [Chrome](#chrome)
 * [Clojure](#clojure)
 * [CSS](#css)
@@ -94,6 +95,10 @@ _1388 TILs and counting..._
 
 - [Loop Over A List Of Dictionaries](ansible/loop-over-a-list-of-dictionaries.md)
 
+### Brew
+
+- [Configure Brew Environment Variables](brew/configure-brew-environment-variables.md)
+
 ### Chrome
 
 - [Access A Value Logged To The Console](chrome/access-a-value-logged-to-the-console.md)

brew/configure-brew-environment-variables.md

@@ -0,0 +1,28 @@
+# Configure Brew Environment Variables
+
+The `brew` CLI can be configured with a ton of different environment variables.
+A full listing of those can be found in the [Environment section of their
+docs](https://docs.brew.sh/Manpage#environment).
+
+If you want to change the defaults of any of those values, you can either set
+them directly in your environment:
+
+```bash
+$ set HOMEBREW_BAT=1
+```
+
+Or you can set them in a more dedicated place like one of Homebrew's
+environment files. There are a couple possible locations for these files. I
+prefer to use `$HOME/.homebrew/brew.env` (i.e. `~/.homebrew/brew.env`).
+
+```
+HOMEBREW_BAT=1
+```
+
+This file and directly likely don't exist, so you may have to set them up the
+first time:
+
+```
+$ mkdir $HOME/.homebrew
+$ touch $HOME/.homebrew/brew.env
+```