From 7fb538b1c5fcc9509f1747d7ec8ddf7ecf22b5a6 Mon Sep 17 00:00:00 2001
From: Jan <jp@devnull.cz>
Date: Fri, 21 Jun 2024 16:02:29 +0200
Subject: [PATCH] Refuse the situation when MYGNUTAR and MYTAR_C are both set.

---
 getting-credits/2024/tests/configure.sh | 10 +++++-----
 getting-credits/2024/tests/stef-config  |  3 ++-
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/getting-credits/2024/tests/configure.sh b/getting-credits/2024/tests/configure.sh
index cdbf7f4f..a02879d6 100755
--- a/getting-credits/2024/tests/configure.sh
+++ b/getting-credits/2024/tests/configure.sh
@@ -36,11 +36,11 @@ if [[ -z $MYGNUTAR ]]; then
 		exit 1
 	fi
 else
-#	if [[ -n $MYTAR_C ]]; then
-#		echo "ERROR: both MYGNUTAR and MYTAR_C are set.  That is" \
-#		    "likely not what you want.  Exiting."
-#		exit 1
-#	fi
+	if [[ "$MYTAR_C" != $mytar_c_def_value ]]; then
+		echo "ERROR: both MYGNUTAR and MYTAR_C are set.  That is" \
+		    "likely not what you want.  Exiting."
+		exit 1
+	fi
 	echo "WARNING: Using '$MYGNUTAR' as the GNU tar testing binary."
 	echo "WARNING: This is only for verifying the test setup."
 fi
diff --git a/getting-credits/2024/tests/stef-config b/getting-credits/2024/tests/stef-config
index 31f33d48..35805043 100644
--- a/getting-credits/2024/tests/stef-config
+++ b/getting-credits/2024/tests/stef-config
@@ -45,7 +45,8 @@ export MYTAR=${MYGNUTAR:-$(pwd)/$MYTARNAME}
 
 # You either set and export MYTAR_C to your mytar.c before running the test
 # suite, or set it in $STEF_CONFIG_LOCAL.
-export MYTAR_C=${MYTAR_C:-"set-me-to-mytar.c-see-README"}
+export mytar_c_def_value="set-me-to-mytar.c-see-README"
+export MYTAR_C=${MYTAR_C:-$mytar_c_def_value}
 
 # You either set and export GNUTAR to the GNU tar binary path before running the
 # test suite, or set it in $STEF_CONFIG_LOCAL.