browser-emulator: notify aws script should search for the binary first

Author: ivchicano

browser-emulator/notify-aws.sh

@@ -10,6 +10,16 @@ set -o xtrace
 pip3 install --break-system-packages https://s3.amazonaws.com/cloudformation-examples/aws-cfn-bootstrap-py3-latest.tar.gz
 
 # sending the finish call
-/home/ubuntu/.local/bin/cfn-signal -e 0 --stack ${AWS_STACK} --resource BrowserInstance --region ${AWS_REGION}
+CFN_SIGNAL_BIN="$(command -v cfn-signal || true)"
+if [[ -z "${CFN_SIGNAL_BIN}" && -x "/home/ubuntu/.local/bin/cfn-signal" ]]; then
+    CFN_SIGNAL_BIN="/home/ubuntu/.local/bin/cfn-signal"
+fi
+
+if [[ -z "${CFN_SIGNAL_BIN}" ]]; then
+    echo "cfn-signal binary not found" >&2
+    exit 1
+fi
+
+"${CFN_SIGNAL_BIN}" -e 0 --stack "${AWS_STACK}" --resource BrowserInstance --region "${AWS_REGION}"
 
 echo "Instance is ready"