test(valgrind): Add a script to test for memory leaks

flake.nix

@@ -100,6 +100,8 @@
           rust
           cargo-edit
           cargo-expand
+
+          valgrind
         ];
         inherit nativeBuildInputs buildInputs;
       };

scripts/valgrind_test.sh

@@ -0,0 +1,40 @@
+#! /usr/bin/env sh
+# Copyright (C) 2023 - 2024:
+# The Trinitrix Project <soispha@vhack.eu, antifallobst@systemausfall.org>
+# SPDX-License-Identifier: LGPL-3.0-or-later
+#
+# This file is part of the Trixy crate for Trinitrix.
+#
+# Trixy is free software: you can redistribute it and/or modify
+# it under the terms of the Lesser GNU General Public License as
+# published by the Free Software Foundation, either version 3 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# and the Lesser GNU General Public License along with this program.
+# If not, see <https://www.gnu.org/licenses/>.
+
+cd "$(dirname "$0")" || {
+    echo "BUG: There is no parent dirname!";
+    exit 1
+}
+cd ..
+
+make
+cargo build
+
+export TRINITRIX_LOG=info
+
+valgrind --leak-check=full \
+    --show-leak-kinds=all \
+    --show-error-list=yes \
+    --track-origins=yes \
+    --log-file=./target/valgrind_out.txt \
+    ./target/debug/trinitrix --plugin-path ./target/c_build/plugin.so
+
+cat ./target/valgrind_out.txt