Various I/O fixes to support input from java tasks.

Addition of a -noinput flag to indicate input is not allowed
to prevent locking up non-interactive builds.

PR:	18133


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@274657 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -86,7 +86,9 @@ public class DemuxInputStream extends InputStream {
      */
     public int read() throws IOException {
         byte[] buffer = new byte[1];
-        project.demuxInput(buffer, 0, 1);
+        if (project.demuxInput(buffer, 0, 1) == -1) {
+            return -1;
+        }
         return buffer[0];
     }
     

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

@@ -108,6 +108,9 @@ public class Main {
     /** File names of property files to load on startup. */
     private Vector propertyFiles = new Vector(5);
 
+    /** Indicates whether this build is to support interactive input */
+    private boolean allowInput = true;
+    
     /**
      * The Ant logger class. There may be only one logger. It will have
      * the right to use the 'out' PrintStream. The class must implements the
@@ -280,6 +283,8 @@ public class Main {
             } else if (arg.equals("-debug")) {
                 printVersion();
                 msgOutputLevel = Project.MSG_DEBUG;
+            } else if (arg.equals("-noinput")) {
+                allowInput = false;
             } else if (arg.equals("-logfile") || arg.equals("-l")) {
                 try {
                     File logFile = new File(args[i + 1]);
@@ -571,7 +576,9 @@ public class Main {
                 //System.setSecurityManager(new NoExitSecurityManager());
             }
             try {
-                project.setDefaultInputStream(System.in);
+                if (allowInput) { 
+                    project.setDefaultInputStream(System.in);
+                }
                 System.setIn(new DemuxInputStream(project));
                 System.setOut(new PrintStream(new DemuxOutputStream(project, false)));
                 System.setErr(new PrintStream(new DemuxOutputStream(project, true)));
@@ -751,6 +758,7 @@ public class Main {
         msg.append("    -l     <file>                ''" + lSep);
         msg.append("  -logger <classname>    the class which is to perform logging" + lSep);
         msg.append("  -listener <classname>  add an instance of class as a project listener" + lSep);
+        msg.append("  -noinput               do not allow interactive input" + lSep);
         msg.append("  -buildfile <file>      use given buildfile" + lSep);
         msg.append("    -file    <file>              ''" + lSep);
         msg.append("    -f       <file>              ''" + lSep);

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

@@ -1087,6 +1087,7 @@ public class Project {
     public int defaultInput(byte[] buffer, int offset, int length)
         throws IOException {
         if (defaultInputStream != null) {
+            System.out.flush();
             return defaultInputStream.read(buffer, offset, length);
         } else {
             throw new EOFException("No input provided for project");

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

@@ -109,6 +109,13 @@ public class LogOutputStream extends OutputStream {
         skip = (c == '\r');
     }
 
+    /**
+     * Flush this log stream 
+     */
+    public void flush() {
+       processBuffer();
+    }
+    
 
     /**
      * Converts the buffer to a string and sends it to <code>processLine</code>

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

@@ -399,6 +399,7 @@ public class Redirector {
             outPrintStream = new PrintStream(outputStream);
         }
         outPrintStream.print(line);
+        outPrintStream.flush();
     }
     
     /**