Wouldn't be possible to put an if="use.A" in every target of
lib_A.xml, and have every target of A and B repeated in your generic
with a dependency on the A and B implementation.
Maybe you can also try to play with macro instead of target. You
replace every target by a macro, and place them in A and B, inside a
<target name="define-macro" if="use.A">. Then n the generic script
you put some generic target implementation that calls the macro.
2008/5/29 Cyril Sagan <[EMAIL PROTECTED]>:
> PROBLEM: I'm trying to develop a general build framework. In so doing,
> I need some mechanism for to provide a "conditional implementation"
> for a target. We cannot solve this problem using <antcall/>.
> Can anyone suggest an implementation?
>
>
> Here's a couple ways that I tried, that almost work,... but do not.
>
> All use this simple build.xml:
> <?xml version="1.0"?>
> <project name="generic_build" default="all">
> <property file="config.properties" />
> <import file="common.xml"/>
> </project>
>
>
> Failing attempt #1: This almost works, but doesn't because <import/>
> cannot be embedded inside a target!! arg!
>
> common.xml:
> <?xml version="1.0"?>
> <project name="generic_build" default="all">
> <target name="use_lib_A" if="use.A">
> <!-- sorry, cannot <import/> in a target! -->
> <import file="lib_A.xml" /> <!-- target "all_impl" defined inside
> -->
> </target>
>
> <target name="use_lib_B" if="use.B">
> <!-- sorry, cannot <import/> in a target! -->
> <import file="lib_B.xml" /> <!-- target "all_impl" defined inside
> -->
> </target>
>
> <target name="all"
> depends="init, use_lib_A, use_lib_B, all_impl" />
> </project>
>
>
>
> Failing attempt #2: This would work, if Ant supported property expansion
> in the targets's depends attribute.
>
> common.xml:
> <?xml version="1.0"?>
> <project name="generic_build" default="all">
> <import file="lib_A.xml" />
> <import file="lib_B.xml" />
>
> <target name="use_lib_A" if="use.A">
> <property name="use.library" value="lib_A" />
> </target>
>
> <target name="use_lib_B" if="use.B">
> <property name="use.library" value="lib_B" />
> </target>
>
> <target name="use_lib_B" if="use.B">
> <import file="lib_B.xml" /> <!-- target "all_impl" defined inside
> -->
> </target>
>
> <!-- sorry, no property expansion inside attributes! -->
> <target name="all"
> depends="init, use_lib_A, use_lib_B, ${use.library}.all_impl" />
> </project>
>
>
>
> Failing attempt #3: Almost works, except the depends targets
> always excute...
>
> common.xml:
> <?xml version="1.0"?>
> <project name="generic_build" default="all">
> <import file="lib_A.xml" />
> <import file="lib_B.xml" />
>
> <!-- sorry, depends called regardless of if/unless -->
> <target name="use_lib_A" if="use.A" depends="implementation_A" />
> <target name="use_lib_A" if="use.B" depends="implementation_B" />
>
> <target name="all" depends="init, use_lib_A, use_lib_B"
> </project>
>
> This gets us closest to what we want, and would suffice if we could
> tolerate the <antcall/>:
> <target name="use_lib_A" if="use.A">
> <antcall target="implementation_A" />
> </target>
>
> ...but we can't use antcall because it re-reads the *entire* build
> file. There's some fairly complicated init (that we don't have
> control of) that doesn't tolerate being called multiple times.
>
> I'd appreciate any suggestions from the experts!
>
> Thanks.
>
> --Cyril
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
--
Gilles Scokart
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
