From 03b2df5656fabbec2514b4983bf16b07ce2de258 Mon Sep 17 00:00:00 2001
From: Johnny Fernandes <up202402612@up.pt>
Date: Sat, 16 May 2026 20:40:28 +0000
Subject: [PATCH] Fix run_webots.sh exit-1 when N=0 (calibration mode)

`active=$(grep -c '^Sheep' "$DST")` returns 0 with exit code 1 when
no sheep are left in the world, which fires set -e and kills the
script before it can launch Webots. Wrap with `|| true` so the
calibration mode (N=0) can actually run.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
---
 tools/run_webots.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/run_webots.sh b/tools/run_webots.sh
index 8c8a759..3263a86 100755
--- a/tools/run_webots.sh
+++ b/tools/run_webots.sh
@@ -115,7 +115,7 @@ for i in $(seq $((N+1)) 10); do
     sed -i "s|^Sheep .* \"sheep${i}\".*|# &|" "$DST"
 done
 
-active=$(grep -c '^Sheep' "$DST")
+active=$(grep -c '^Sheep' "$DST" || true)
 echo "------------------------------------------------------------"
 echo "World      : $DST"
 echo "Mode       : $MODE"