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From Dominique Devienne <ddevie...@gmail.com>
Subject Re: deep-if/deep-unless
Date Wed, 16 Dec 2009 17:05:39 GMT
On Wed, Dec 16, 2009 at 9:32 AM, Antoine Levy Lambert <antoine@gmx.de> wrote:
> is a sequence of tasks. If the process is highly configurable, there can be
> several blocks of tasks which are optionally executed.

Maybe a custom executor that blocks some targets would work for you?
Depends how these properties that prevent a target from executing
(including their dependencies) are set or computed, but from the
command line you could say

    ant deploy /block:war

to launch the deploy target, completely forcing the removal of the war
target from the target dependency graph. I guess the issue with your
proposed deep if/unless is when that condition is evaluated. IMHO,
once the DAG has been resolved and targets start running, it's too
late. If you decide to block from the command line, that's OK, because
you in effect "edit" the script on the fly before it started, to
remove a dependency occurring anywhere in the DAG, overriding the
build author's intention on purpose. But once it's started, the effect
of removing a dependency in the middle could reorder the build in such
a way that it's now incompatible with the targets already executed so
far, and this to me makes it brittle and undesirable. My $0.02. --DD

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