bin/brew: don't allow unbound variables.

MikeMcQuaid · MikeMcQuaid · commit 7c7b15d8864e · 2025-01-09T12:48:48.000Z
This can fail for users using `bash -u` or `set -u` in their shell so
let's try to be stricter here for both them and us.
diff --git a/bin/brew b/bin/brew
@@ -1,4 +1,4 @@
-#!/bin/bash -p
+#!/bin/bash -pu
 set -u
 
 # Fail fast with concise message when not using bash

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-#!/bin/bash -p`
	`1`	`+#!/bin/bash -pu`
`2`	`2`	`set -u`
`3`	`3`
`4`	`4`	`# Fail fast with concise message when not using bash`