From 13d7657f54a7adb371577bea52e00d8e92f9a78a Mon Sep 17 00:00:00 2001
From: jroddev <jroddev@gmail.com>
Date: Sun, 13 Feb 2022 16:54:39 +1100
Subject: [PATCH] g++ install is failing because + is treated as a regex
 control character

---
 pre_cache_action.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pre_cache_action.sh b/pre_cache_action.sh
index 51a5b78..c4f764b 100755
--- a/pre_cache_action.sh
+++ b/pre_cache_action.sh
@@ -28,7 +28,8 @@ echo "done."
 
 echo -n "Verifying packages..."
 for package in $packages; do
-  apt-cache search ^$package$ | grep $package > /dev/null
+  escaped=$(echo $package | sed 's/+/\\+/g')
+  apt-cache search ^$escaped$ | grep $package > /dev/null
   if [ $? -ne 0 ]; then
     echo "aborted."
     echo "Package '$package' not found." >&2