Ignore relative library directories for scripts (#2408)

Signed-off-by: Jonathan Gilbert <jpg@trillica.com>

bundles/org.openhab.core.automation.module.script.rulesupport/src/main/java/org/openhab/core/automation/module/script/rulesupport/internal/loader/DependencyTracker.java

@@ -17,9 +17,6 @@ import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 
 import org.openhab.core.automation.module.script.rulesupport.internal.loader.collection.BidiSetBag;
-import org.osgi.service.component.annotations.Activate;
-import org.osgi.service.component.annotations.Component;
-import org.osgi.service.component.annotations.Deactivate;
 import org.osgi.service.component.annotations.Reference;
 import org.osgi.service.component.annotations.ReferenceCardinality;
 import org.osgi.service.component.annotations.ReferencePolicy;
@@ -27,25 +24,25 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
- * Tracks dependencies between scripts and reloads dependees
+ * Tracks dependencies between scripts and reloads dependees. Can be used by script engine providers to watch library
+ * files.
  *
  * @author Jonathan Gilbert - Initial contribution
  */
-@Component(immediate = true, service = DependencyTracker.class)
-public class DependencyTracker {
+public abstract class DependencyTracker {
 
     private final Logger logger = LoggerFactory.getLogger(DependencyTracker.class);
 
     private final Set<DependencyChangeListener> dependencyChangeListeners = ConcurrentHashMap.newKeySet();
 
     private final BidiSetBag<String, String> scriptToLibs = new BidiSetBag<>();
-    private final ScriptLibraryWatcher scriptLibraryWatcher = new ScriptLibraryWatcher() {
+    private final ScriptLibraryWatcher scriptLibraryWatcher = new ScriptLibraryWatcher(getLibPath()) {
         @Override
         void updateFile(String libraryPath) {
             Set<String> scripts;
             synchronized (scriptToLibs) {
                 scripts = new HashSet<>(scriptToLibs.getKeys(libraryPath)); // take a copy as it will change as we
-                                                                            // reimport
+                // reimport
             }
             DependencyTracker.this.logger.debug("Library {} changed; reimporting {} scripts...", libraryPath,
                     scripts.size());
@@ -55,12 +52,12 @@ public class DependencyTracker {
         }
     };
 
-    @Activate
+    abstract String getLibPath();
+
     public void activate() {
         scriptLibraryWatcher.activate();
     }
 
-    @Deactivate
     public void deactivate() {
         scriptLibraryWatcher.deactivate();
     }

bundles/org.openhab.core.automation.module.script.rulesupport/src/main/java/org/openhab/core/automation/module/script/rulesupport/internal/loader/ScriptFileWatcher.java

@@ -59,12 +59,13 @@ import org.slf4j.LoggerFactory;
  *
  * @author Simon Merschjohann - Initial contribution
  * @author Kai Kreuzer - improved logging and removed thread pool
- * @author Jonathan Gilbert - added dependency tracking & per-script start levels
+ * @author Jonathan Gilbert - added dependency tracking, per-script start levels & ignore lib dirs
  */
 @Component(immediate = true)
 public class ScriptFileWatcher extends AbstractWatchService
         implements ReadyService.ReadyTracker, DependencyTracker.DependencyChangeListener {
 
+    private static final Set<String> KNOWN_LIB_NAMES = Set.of("node_modules");
     private static final String FILE_DIRECTORY = "automation" + File.separator + "jsr223";
     private static final long RECHECK_INTERVAL = 20;
 
@@ -151,9 +152,22 @@ public class ScriptFileWatcher extends AbstractWatchService
 
     @Override
     protected Kind<?>[] getWatchEventKinds(Path subDir) {
+        if (isLibDirectory(subDir)) {
+            return null; // don't watch libraries
+        }
+
         return new Kind<?>[] { ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY };
     }
 
+    private Boolean isLibDirectory(Path subDir) {
+        for (Path segment : subDir) {
+            if (KNOWN_LIB_NAMES.contains(segment.toString())) {
+                return true;
+            }
+        }
+        return false;
+    }
+
     @Override
     protected void processWatchEvent(WatchEvent<?> event, Kind<?> kind, Path path) {
         File file = path.toFile();

bundles/org.openhab.core.automation.module.script.rulesupport/src/main/java/org/openhab/core/automation/module/script/rulesupport/internal/loader/ScriptLibraryWatcher.java

@@ -18,7 +18,6 @@ import java.io.File;
 import java.nio.file.Path;
 import java.nio.file.WatchEvent;
 
-import org.openhab.core.OpenHAB;
 import org.openhab.core.service.AbstractWatchService;
 
 /**
@@ -28,11 +27,8 @@ import org.openhab.core.service.AbstractWatchService;
  */
 abstract class ScriptLibraryWatcher extends AbstractWatchService {
 
-    public static final String LIB_PATH = String.join(File.separator, OpenHAB.getConfigFolder(), "automation", "lib",
-            "javascript");
-
-    ScriptLibraryWatcher() {
-        super(LIB_PATH);
+    ScriptLibraryWatcher(String libPath) {
+        super(libPath);
     }
 
     @Override