DO NOT REPLY New: - cannot have multiple input tasks with command line redirection

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http://issues.apache.org/bugzilla/show_bug.cgi?id=42544

           Summary: cannot have multiple input tasks with
command line
                    redirection
           Product: Ant
           Version: 1.7.0
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Core tasks
        AssignedTo: devant.apache.org
        ReportedBy: davidwbtgmail.com


In 1.6.2 it used to be possible to invoke an ant script from
an external java
program (or shell command) where input values were passed
through command line
redirection with each value being terminated by a new line.

In 1.7.0 it appears this functionality has been broken since
the
DefaultInputHandler has been modified to use a
BufferedReader inside the
handleInput method. The problem with this is that in the
first input task, the
bufferedreader will read up to the buffer size (8k), however
the
DefaultInputHandler will only consume the first line of
this. When the second
input task comes along it will not find anything (i guess
maybe if you had very
large input you might find something).

We have a similar problem elsewhere in our code and we
handled it by creating a
single static BufferedReader around System.in that was
shared. This means that
line 1 can be read by one bit of code, line by the next and
so on because they
are using a single BufferedReader.

In 1.6.2 the old code was using DataInputStream.readLine
which is deprecated and
probably why the new code uses BufferedReader.

In order to solve my particular problem, I have written an
extension of
BufferedReader which uses a single shared BufferReader
around System.in. However
this is not a general purpose problem to the solution i
think as the
InputHandler should handle the contract of working with the
passed in stream.

One possible solution might be to implement a custom
LineReader that does not
rely in BufferedReader.

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