From 8f0aa9cec99f97cf49ed3dbb2dcdd5d36017dd4e Mon Sep 17 00:00:00 2001
From: ER <eino.rauhala@proton.me>
Date: Sun, 13 Aug 2023 17:29:11 +0300
Subject: [PATCH] chore: export more vars as readonly

---
 build.sh | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/build.sh b/build.sh
index cbb0292..4c8339a 100644
--- a/build.sh
+++ b/build.sh
@@ -14,13 +14,16 @@ get_yaml_array() {
 }
 export -f get_yaml_array # this makes the function available to all modules
 
-# Automatically determine which Fedora version we're building.
-export FEDORA_VERSION="$(grep -Po '(?<=VERSION_ID=)\d+' /usr/lib/os-release)"
+# Declare dynamically generated variables as read-only and exported
+declare -rx IMAGE_NAME BASE_IMAGE FEDORA_VERSION
 
 # Read configuration variables.
 BASE_IMAGE="$(yq '.base-image' "$RECIPE_FILE")"
 IMAGE_NAME="$(yq '.name' "$RECIPE_FILE")"
 
+# Automatically determine which Fedora version we're building.
+FEDORA_VERSION="$(grep -Po '(?<=VERSION_ID=)\d+' /usr/lib/os-release)"
+
 # Welcome.
 echo "Building $IMAGE_NAME from Fedora $FEDORA_VERSION ($BASE_IMAGE)."