You mean <dependset>, right? Anyhow, to conditionally execute tasks, you first have to find out if the generation process needs to happen, and then make it happen if needed.
The first step is done using either <available> or <dependset>. The latter is more generic, but doesn't set a property when doing something (deleting the targets when it found they are out-of-date vs. the sources). The former set the property you need, but supports only 1 to 1 (using a mapper) or many-to-1 relationship, and doesn't delete the out-of-date target files. If you go for <dependset>, you need an additional <available> usually to find out a-posteriori if it did something. If you do with <available>, you may need to delete the target files (depends on your generation process). The second step is done in a separate target executed conditionally based on the target than check whether the target files are up-to-date or not, which sets a property accordingly. All this needs to be wrap in yet another target that depends on the two previous one. <target name="gen" depends="gen-needed?, do-gen" /> <target name="gen-needed?"> ... <!-- set property gen-targetfiles-up2date only when target files are really up-todate. Do nothing if they're not. --> <property name="gen-targetfiles-up2date" value="whatever" /> </target> <target name="do-gen" unless="gen-targetfiles-up2date"> <xdoclet ... /> </target> I hope this helps. --DD -----Original Message----- From: Sebastien BLANC [mailto:Sebastien.Blanc@;alcatel.com] Sent: Friday, November 08, 2002 3:57 PM To: [EMAIL PROTECTED] Subject: Depend task 0 deletion does stop target execution Hello ! I'd like to know if there is a way to perform the following with ant (haven't found anything in doc): I have tasks in my project generating code and meta-data (xdoclet for instance) and I'd like these files not to be regenerated if they were already generated before [and if the source files for the generation were not modified (as javac does)]. The 'Depend' task does not resolve the pb since it's only removing the generated files if time stamp between sources and generation verifies a given order. What I would have expected is that ant would stop the execution of the target if the depend task nested into my target did not detect any file to remove: this way the files would not be regenerated twice. Let me know if I did miss smthg. thanx. seb. -- To unsubscribe, e-mail: <mailto:ant-user-unsubscribe@;jakarta.apache.org> For additional commands, e-mail: <mailto:ant-user-help@;jakarta.apache.org> -- To unsubscribe, e-mail: <mailto:ant-user-unsubscribe@;jakarta.apache.org> For additional commands, e-mail: <mailto:ant-user-help@;jakarta.apache.org>