log environment with Level.FINER

should help #926

Author: Vladimir Kotal

opengrok-indexer/src/main/java/org/opengrok/indexer/util/Executor.java

@@ -34,6 +34,7 @@
 import java.lang.Thread.UncaughtExceptionHandler;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Map;
 import java.util.Timer;
 import java.util.TimerTask;
 import java.util.logging.Level;
@@ -165,9 +166,14 @@ public int exec(final boolean reportExceptions, StreamHandler handler) {
             dir_str = cwd.toString();
         }
 
+        String env_str = "";
+        if (LOGGER.isLoggable(Level.FINER)) {
+            Map<String,String> env_map = processBuilder.environment();
+            env_str = " with environment: " + env_map.toString();
+        }
         LOGGER.log(Level.FINE,
-                "Executing command {0} in directory {1}",
-                new Object[] {cmd_str,dir_str});
+                "Executing command {0} in directory {1}{2}",
+                new Object[] {cmd_str, dir_str, env_str});
 
         Process process = null;
         try {