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From Stefan Bodewig <>
Subject Re: per-task diagnostics
Date Tue, 13 Feb 2007 05:12:07 GMT
On Wed, 07 Feb 2007, Steve Loughran <> wrote:

> I've been thinking about how we could improve our diagnostics, by
> moving more of the diags into tasks themselves. Every task could
> have a diagnostics(PrintStream) method that would be called to do
> the diags.

I think it should get a Project instance instead of a PrinStream so
that output goes to the logger attached, whatever that may be.

Of course the PrinStream could be wrapping a LogOutputStream, but that
would be taking away the opportunity to log at different levels.

> 1. we could introspect for a public static void
> diagnostics(PrintStream) throws BuildException method. This would
> let us diagnose even if you cannot instantiate the task enough for
> new() to work.

Makes sense.

> 2. or we'd use an interface Diagnostics that things could implement

In many cases where required libraries are not there, we will fail to
create a task instance.  In some cases we may even be unable to create
the class, but the "can't create an instance" cases are probably more


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