Add utility script to stress-test mapgen

util/stress_mapgen.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+gameid=${gameid:-devtest}
+minetest=$dir/../bin/minetest
+testspath=$dir/../tests
+conf_server=$testspath/server.conf
+worldpath=$testspath/world
+
+run () {
+	if [ -n "$PERF" ]; then
+		perf record -z --call-graph dwarf -- "$@"
+	else
+		"$@"
+	fi
+}
+
+[ -e $minetest ] || { echo "executable $minetest missing"; exit 1; }
+
+rm -rf $worldpath
+mkdir -p $worldpath/worldmods
+
+settings=(sqlite_synchronous=0 helper_mode=mapgen)
+[ -n "$PROFILER" ] && settings+=(profiler_print_interval=15)
+printf '%s\n' "${settings[@]}" >$testspath/server.conf \
+
+ln -s $dir/helper_mod $worldpath/worldmods/
+
+args=(--config $conf_server --world $worldpath --gameid $gameid)
+[ -n "$PROFILER" ] && args+=(--verbose)
+run $minetest --server "${args[@]}"