made LockFile reentrant (multiple locks on the same file can be acquired in the same JVM instance)

added argument file to JavaProcessBuilder

jwo-test/src/main/java/module-info.java

@@ -0,0 +1,6 @@
+module net.woggioni.jwo.lockfile.test {
+    requires net.woggioni.jwo;
+    requires static lombok;
+
+    exports net.woggioni.jwo.lockfile.test;
+}

jwo-test/src/main/java/net/woggioni/jwo/lockfile/test/LockFileTestMain.java

@@ -0,0 +1,42 @@
+package net.woggioni.jwo.lockfile.test;
+
+import lombok.SneakyThrows;
+import net.woggioni.jwo.LockFile;
+import net.woggioni.jwo.Run;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+
+public class LockFileTestMain {
+
+    @SneakyThrows
+    private static void run(
+        Path lockfilePath,
+        boolean shared,
+        boolean keep
+    ) {
+        Thread t = new Thread((Run)() -> {
+            try (AutoCloseable lockfile = LockFile.acquire(lockfilePath, shared)) {
+                while (keep) {
+                    Thread.sleep(1000);
+                }
+            }
+        });
+        t.start();
+        try (AutoCloseable lockfile = LockFile.acquire(lockfilePath, shared)) {
+            while (keep) {
+                Thread.sleep(1000);
+            }
+        }
+        t.join();
+    }
+
+    @SneakyThrows
+    public static void main(String[] args) {
+        Path lockfilePath = Paths.get(args[0]);
+        boolean shared = Boolean.parseBoolean(args[1]);
+        boolean keep = Boolean.parseBoolean(args[2]);
+        run(lockfilePath, shared, keep);
+    }
+}