If the output has not been redirected (via -logfile) write error

messages to stderr instead of stdout.
Suggested by:	Peter Nordlund <peter.nordlund@lentus.se>


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@267968 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/BuildLogger.java

@@ -89,4 +89,12 @@ public interface BuildLogger extends BuildListener {
      * editors can parse files names, etc.
      */
     public void setEmacsMode(boolean emacsMode);
-}
+
+    /**
+     * Set the output stream to which this logger is to send error messages.
+     *
+     * @param err the error stream for the logger.
+     */
+    public void setErrorPrintStream(PrintStream err);
+    
+}

src/main/org/apache/tools/ant/DefaultLogger.java

@@ -65,6 +65,7 @@ public class DefaultLogger implements BuildLogger {
     private static int LEFT_COLUMN_SIZE = 12;
 
     private PrintStream out;
+    private PrintStream err;
     private int msgOutputLevel;
     private long startTime = System.currentTimeMillis();
 	
@@ -94,6 +95,15 @@ public class DefaultLogger implements BuildLogger {
         this.out = output;
     }
 
+    /**
+     * Set the output stream to which this logger is to send error messages.
+     *
+     * @param err the error stream for the logger.
+     */
+    public void setErrorPrintStream(PrintStream err) {
+        this.err = err;
+    }
+
     /**
      * Set this logger to produce emacs (and other editor) friendly output.
      *
@@ -120,18 +130,18 @@ public class DefaultLogger implements BuildLogger {
             out.println(lSep + "BUILD SUCCESSFUL");
         }
         else {
-            out.println(lSep + "BUILD FAILED" + lSep);
+            err.println(lSep + "BUILD FAILED" + lSep);
 
             if (error instanceof BuildException) {
-                out.println(error.toString());
+                err.println(error.toString());
 
                 Throwable nested = ((BuildException)error).getException();
                 if (nested != null) {
-                    nested.printStackTrace(out);
+                    nested.printStackTrace(err);
                 }
             }
             else {
-                error.printStackTrace(out);
+                error.printStackTrace(err);
             }
         }
 
@@ -152,6 +162,8 @@ public class DefaultLogger implements BuildLogger {
 
     public void messageLogged(BuildEvent event) {
 
+        PrintStream logTo = event.getPriority() == Project.MSG_ERR ? err : out;
+
         // Filter out messages based on priority
         if (event.getPriority() <= msgOutputLevel) {
 
@@ -162,14 +174,14 @@ public class DefaultLogger implements BuildLogger {
                 if (!emacsMode) {
                     String msg = "[" + name + "] ";
                     for (int i = 0; i < (LEFT_COLUMN_SIZE - msg.length()); i++) {
-                        out.print(" ");
+                        logTo.print(" ");
                     }
-                    out.print(msg);
+                    logTo.print(msg);
                 }
             }
 
             // Print the message
-            out.println(event.getMessage());
+            logTo.println(event.getMessage());
         }
     }
 

src/main/org/apache/tools/ant/Main.java

@@ -81,6 +81,9 @@ public class Main {
     /** Stream that we are using for logging */
     private PrintStream out = System.out;
 
+    /** Stream that we are using for logging error messages */
+    private PrintStream err = System.err;
+
     /** The build targets */
     private Vector targets = new Vector(5);
 
@@ -152,6 +155,7 @@ public class Main {
                     File logFile = new File(args[i+1]);
                     i++;
                     out = new PrintStream(new FileOutputStream(logFile));
+                    err = out;
                     System.setOut(out);
                     System.setErr(out);
                 } catch (IOException ioe) {
@@ -367,6 +371,7 @@ public class Main {
         
         logger.setMessageOutputLevel(msgOutputLevel);
         logger.setOutputPrintStream(out);
+        logger.setErrorPrintStream(err);
         logger.setEmacsMode(emacsMode);
         
         return logger;

src/main/org/apache/tools/ant/taskdefs/Ant.java

@@ -123,6 +123,7 @@ public class Ant extends Task {
                 DefaultLogger logger = new DefaultLogger();
                 logger.setMessageOutputLevel(Project.MSG_INFO);
                 logger.setOutputPrintStream(out);
+                logger.setErrorPrintStream(out);
                 p1.addBuildListener(logger);
             }
             catch( IOException ex ) {