Hello,
I have several jar (and war) tasks like this:
<jar destfile="${global_lib}/${ws_aar}" filesonly="yes">
<fileset dir="${build.server}" includes="**/*.class"/>
</jar>
These are pretty basic and they work fine. However in some of my
build situations, the destfile isn't a real file but a symbolic link.
In those situations I need to break the symlink (causing a new file to
be created), rather than "updating" the symlink (which would cause the
target of the link to be updated).
Normally I would do this by removing the destfile (whether it's a
symlink or a regular file) before recreating it. But I'm not seeing a
nice way to do this with Ant.
I tried using the update parameter:
<jar destfile="${global_lib}/${ws_aar}" filesonly="yes" update="true">
<fileset dir="${build.server}" includes="**/*.class"/>
</jar>
but this doesn't break the symlink.
Adding a delete task before the jar task isn't correct, because it
will cause the destfile to always be deleted -- I only want to delete
it when the jar task actually creates the destfile (and not when it
determines that the destfile is up-to-date with respect to the
includes).
The only solution I've found is to use a dependset task before the jar task:
<dependset>
<srcfileset
dir = "${build.server}"
includes = "**/*.class" />
<targetfilelist
dir = "${global_lib}"
files = "${ws_aar}" />
</dependset>
<jar destfile="${global_lib}/${ws_aar}" filesonly="yes">
<fileset dir="${build.server}" includes="**/*.class"/>
</jar>
This works, but it seems messy because it requires duplication of the
fileset info and the name of the target file. I'm hoping there's some
other way to accomplish this.
I thought about extending the jar task and adding a new
"delete-before-create" parameter, so that I could do something like
this:
<myjar destfile="${global_lib}/${ws_aar}" filesonly="yes"
delete-before-create="true">
<fileset dir="${build.server}" includes="**/*.class"/>
</myjar>
This would be the nicest solution, but I'm not sure if it's possible
to extend the jar task like this -- the extension docs I've read seem
to only talk about creating new tasks, not extending existing tasks
like jar/war.
Any thoughts would be appreciated. Thanks!
-Jason
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