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Posted to dev@ant.apache.org by "Shatzer, Larry" <La...@Spirent.com> on 2003/09/03 20:51:06 UTC
antcall and build.xml being modified.
Consider the following build file:
<?xml version="1.0" encoding="UTF-8"?>
<project name="test" default="test">
<target name="test">
<antcall target="echotarget"/>
<replace
file = "build.xml"
token = "&lt;TEST MESSAGE&gt;"
value = "&lt;test message&gt;"
/>
<antcall target="echotarget"/>
<replace
file = "build.xml"
token = "&lt;test message&gt;"
value = "&lt;TEST MESSAGE&gt;"
/>
<antcall target="echotarget"/>
</target>
<target name="echotarget">
<echo message="<TEST MESSAGE>"/>
</target>
</project>
When it is run the output is as follows:
Buildfile: build.xml
test:
echotarget:
[echo] <TEST MESSAGE>
echotarget:
[echo] <test message>
echotarget:
[echo] <TEST MESSAGE>
BUILD SUCCESSFUL
Total time: 3 seconds
I figured the output would have been this:
echotarget:
[echo] <TEST MESSAGE>
echotarget:
[echo] <TEST MESSAGE>
echotarget:
[echo] <TEST MESSAGE>
Now granted, the condition of the build file be updated while the build is
running would be rare. I can see some benefits of it doing this, like a call
to a CVS update target, where the build file is updated, and then the
targets contents could be executed with the new changes.
If anything, I think this should be documented, since it is a gotcha. It got
me while working on a build file, and saved it with a broken task while the
build ran in the background and it failed.
-- Larry
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Re: antcall and build.xml being modified.
Posted by Stefan Bodewig <bo...@apache.org>.
On Thu, 4 Sep 2003, Conor MacNeill <co...@cortexebusiness.com.au>
wrote:
> I would like to have this documented as "undefined".
I agree and will change my blurb accordingly.
Stefan
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Re: antcall and build.xml being modified.
Posted by Conor MacNeill <co...@cortexebusiness.com.au>.
On Thu, 4 Sep 2003 05:31 pm, Stefan Bodewig wrote:
>
> > If anything, I think this should be documented, since it is a
> > gotcha.
>
> Will do.
>
I would like to have this documented as "undefined". I don't think we should
be forced to reparse a build file in future just because we do so now. A
cached representation of the buildfile is certainly possible and probably
desirable for heavy antcall use.
Self-modifying builds are not a practice I would recommend.
Conor
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Re: antcall and build.xml being modified.
Posted by Stefan Bodewig <bo...@apache.org>.
On Wed, 3 Sep 2003, Larry Shatzer <La...@spirent.com> wrote:
> When it is run the output is as follows:
As long as you are not using an OS like Windows that locks your build
file while Ant is running.
> I figured the output would have been this:
<antcall> is just a thin layer on top of <ant>, it reparses the build
file for each invocation. This makes it the heavy operation it is.
> If anything, I think this should be documented, since it is a
> gotcha.
Will do.
Stefan
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