Extract LdPreload computation out of TorProcess

network/tor/tor/src/main/java/bisq/tor/process/LdPreload.java

@@ -0,0 +1,36 @@
+/*
+ * This file is part of Bisq.
+ *
+ * Bisq is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * Bisq 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 Affero General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Bisq. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package bisq.tor.process;
+
+import java.io.File;
+import java.nio.file.Path;
+import java.util.Arrays;
+import java.util.Objects;
+import java.util.stream.Collectors;
+
+public class LdPreload {
+    public static String computeLdPreloadVariable(Path dirPath) {
+        File[] sharedLibraries = dirPath.toFile()
+                .listFiles((file, fileName) -> fileName.contains(".so."));
+        Objects.requireNonNull(sharedLibraries);
+
+        return Arrays.stream(sharedLibraries)
+                .map(File::getAbsolutePath)
+                .collect(Collectors.joining(":"));
+    }
+}

network/tor/tor/src/main/java/bisq/tor/process/NativeTorProcess.java

@@ -58,7 +58,7 @@ public void start() {
         );
 
         Map<String, String> environment = processBuilder.environment();
-        environment.put("LD_PRELOAD", computeLdPreloadVariable());
+        environment.put("LD_PRELOAD", LdPreload.computeLdPreloadVariable(torDataDirPath));
 
         processBuilder.redirectError(ProcessBuilder.Redirect.DISCARD);
         processBuilder.redirectOutput(ProcessBuilder.Redirect.DISCARD);