check the Python path and fail early

Author: Vladimir Kotal

dev/main

@@ -30,8 +30,13 @@ if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
 	export PATH=${PATH}:/c/Program\ Files\ \(x86\)/Subversion/bin
 	export PATH=${PATH}:${JAVA_HOME}
 
+	PYTHON_PATH="/c/Python39"
+	if [[ ! -d $PYTHON_PATH ]]; then
+		echo "Not a directory: $PYTHON_PATH"
+		exit 1
+	fi
 	# needs to be before the default Python 2
-	export PATH=/c/Python39:${PATH}
+	export PATH=${PYTHON_PATH}:${PATH}
 
 	extra_args="$extra_args -Dorg.opengrok.indexer.analysis.Ctags=c:\\ProgramData\\chocolatey\\lib\\universal-ctags\\tools\\ctags.exe"
 fi