add env script, and (stupid) draft tests

scripts/env.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+#
+# env.sh - set environment for brchess developer.
+#
+# Copyright (C) 2023 Bruno Raoult ("br")
+# Licensed under the GNU General Public License v3.0 or later.
+# Some rights reserved. See COPYING.
+#
+# You should have received a copy of the GNU General Public License along with this
+# program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.html>.
+#
+# SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
+#
+# USAGE: source env.sh [arg]
+#
+# This file will actually be sourced if it was never sourced in current bash
+# environment.
+
+if [[ ! -v _BRLIB_ENV_ ]]; then
+    export _BRLIB_ENV_=1 BRLIB_ROOT LD_LIBRARY_PATH
+    BRLIB_SCRIPTDIR=$(realpath -L "$(dirname "${BASH_SOURCE[0]}")")
+    BRLIB_ROOT=$(realpath -L "$(dirname "${BASH_SOURCE[0]}")/..")
+    BRLIB_LIBDIR="$BRLIB_ROOT/lib"
+    BRLIB_BINDIR="$BRLIB_ROOT/bin"
+    LD_LIBRARY_PATH="${BRLIB_LIBDIR}${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"
+    PATH="$PATH:$BRLIB_BINDIR:$BRLIB_SCRIPTDIR"
+    #printf "R=%s L=%s LD=%s\n" "$BRLIB_ROOT" "$BRLIB_DIR" "$LD_LIBRARY_PATH"
+    unset BRLIB_LIBDIR BRLIB_BINDIR BRLIB_SCRIPTDIR
+    printf "brlib environment complete.\n"
+fi