idegen: Handle symbolic link that targets to current or parent directory

Test: run idegen.sh to generate files for IntelliJ without error

Signed-off-by: utzcoz <utzcoz@gmail.com>
Change-Id: I80958e94f93a8e1ef546bc34bd929d04a224dc9e

tools/idegen/src/Configuration.java

@@ -18,6 +18,8 @@ import java.io.File;
 import java.io.IOException;
 import java.io.BufferedReader;
 import java.io.FileReader;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -153,6 +155,17 @@ public class Configuration {
                 continue;
             }
 
+            if (Files.isSymbolicLink(file.toPath())) {
+                Path target = Files.readSymbolicLink(file.toPath()).normalize();
+                if (target.startsWith("") || target.startsWith(".")
+                    || target.startsWith("..")) {
+                    // Don't recurse symbolic link that targets to parent
+                    // or current directory.
+                    Log.debug("Skipped: " + path);
+                    continue;
+                }
+            }
+
             if (file.isDirectory()) {
                 // Traverse nested directories.
                 if (excludes.exclude(path)) {
@@ -216,8 +229,7 @@ public class Configuration {
      * found.
      */
     private static String parsePackageName(File file) throws IOException {
-        BufferedReader in = new BufferedReader(new FileReader(file));
-        try {
+        try (BufferedReader in = new BufferedReader(new FileReader(file))) {
             String line;
             while ((line = in.readLine()) != null) {
                 String trimmed = line.trim();
@@ -230,8 +242,6 @@ public class Configuration {
             }
 
             return null;
-        } finally {
-            in.close();
         }
     }