On Fri, Aug 16, 2002 at 10:54:17AM -0400, Grinvald, Edward wrote:
> Hello all,
> I have a problem, which i hope you can help me solve: My project has
> several subprojects, let's say a - z. Some of the subprojects depend
> on other subprojects. Let's say a depends on b and c, c depends on d
> and e, and e depends on f. Assum there are no circular dependencies
> (i hope there aren't). Each subproject is in a separate directory, so
> i can say build in a subdirectory, jar, put in 'lib', build in b
> subdirectory, jar, put in 'lib', etc. I am trying to make it so that
> the user can say he/she wants to build a, and it will go to a, read
> dependencies on b and c (from a text file or something), go to build
> b, see dependency on d and e, etc. I see no way to do this other
> then recursion, but i'm having difficulties, because i don't fully
> understand how recursion would work in ant - would the properties be
> mixed up if i invoke the same target multiple times, etc.
In Avalon's Excalibur project, we had the same issue of building a large
number of subprojects with many interdependencies. While waiting for a
better solution (maven's reactor is quite nice), we're using a script
that recursively builds projects, and checks to see if they're already
built before rebuilding. All straight Ant 1.4. A subproject would use it
as follows:
<project name="Excalibur Fortress" default="main" basedir=".">
...
<target name="dependencies" description="Check dependencies"
unless="skip.dependencies">
<ant antfile="../depchecker.xml" target="checkCommon"/>
<ant antfile="../depchecker.xml" target="checkFramework"/>
<ant antfile="../depchecker.xml" target="checkLogkit"/>
<ant antfile="../depchecker.xml" target="checkAltrmi"/>
<ant antfile="../depchecker.xml" target="checkCollections"/>
<ant antfile="../depchecker.xml" target="checkInstrument"/>
<ant antfile="../depchecker.xml" target="checkInstrumentManager"/>
<ant antfile="../depchecker.xml" target="checkSourceResolve"/>
<ant antfile="../depchecker.xml" target="checkEvent"/>
</target>
<target name="compile" depends="dependencies" description="Compiles the source code">
...
</target>
</project>
In depchecker.xml, the checkXxx targets all reuse the same checkRequiredFile or
checkRequiredClass targets. There is support for downloading missing
dependencies, eg checkJUnit could fetch junit.jar from an online repository (see
ibiblio.org/maven)
It's a hack, but then everything in Ant is a hack when you get beyond a certain
level of complexity ;) If you'd like to reuse this, checkout the
jakarta-avalon-excalibur module. The dependency checking is all in
depchecker.xml and quite reusable.
--Jeff
> Please help.
>
> Thank You,
>
> Edward Grinvald
> Computer Associates International
> Programmer, Storage Development
> [EMAIL PROTECTED]
> (631) 342 6350
>
--
Hell is a state of mind. And every state of mind, left to itself,
every shutting up of the creature within the dungeon of it's own
mind -- is, in the end, Hell.
C.S. Lewis, _The Great Divorce_
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