From b0ab15c6da1a47bf279ffdd68c3949cc576ae52c Mon Sep 17 00:00:00 2001
From: aarondill <aaronsacks2006@gmail.com>
Date: Wed, 5 Jul 2023 14:18:09 -0500
Subject: [PATCH] create safeguard in test_writable

This prevents attempting to create files in `/` if a path is not given, instead failing early.
---
 install.sh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/install.sh b/install.sh
index 2e832ad..df950ae 100755
--- a/install.sh
+++ b/install.sh
@@ -468,7 +468,11 @@ is_host_amd64_elf() {
 # Test if a location is writeable by trying to write to it. Windows does not let
 # you test writeability other than by writing: https://stackoverflow.com/q/1999988
 test_writeable() {
-    path="${1:-}/test.txt"
+    if [ -z "${1-}" ]; then
+        # There's a bug if this is reached.
+        abort "BUG: test_writeable requires a path to test."
+    fi
+    path="$1/test.txt"
     if touch "${path}" 2>/dev/null; then
         rm "${path}"
         return 0