On 2009-12-10, Jeff Sinclair <j...@cooljeff.co.uk> wrote: > We've implemented a common build template which other groups at the > firm build upon. One issue we have had is providing a simple way for > our users to plug in custom logic without having to copy Target > definitions. We went about this by providing macro hooks which people > could override. For example if someone needed to do some custom code > generation they could override the pre-compile macro hook.
> Would I be correct in thinking that target groups would be more > suitable instead of the custom macro hooks we have? I think so. > If so are there any examples of Target groups I could look at? Even though its been part of Ant's code base for a year now, it is not even documented 8-( There are a few test build files like http://svn.apache.org/viewvc/ant/core/trunk/src/tests/antunit/core/target-group-test.xml?revision=718943&view=markup Basically you define a target-group where you want to create an extension point <target-group name="extension-point"/> and people who want to have their targets run at the extension point add their targets to this group <target name="my-extension" target-group="extension-point"> ... </target> > I am particularly interested in how I control whether or not my > contributed Target is put at the beginning or end of a Target group. You don't. In your example above you'd have a pre-compile target-group that your compile target depended on and the people with custom code generation would add their targets to the pre-compile target-group. If you need more control over execution order, the depend attribute would resolve that - or you might need even more target-groups. > In terms of support for if/unless, this could be useful for common > build templates such as ours. For example we may have some logic to > build a web component that should not be invoked if the project is not > a web project. This is where the name target-group may be confusing. The targets of a target-group are not executed as part of that group but because the target-group depends on them. At least this is the concept we've currently implemented. > Will it be possible to contribute to target groups programmatically too? Via ProjectHelpers or top-level tasks, yes. Once the graph of targets has been built, you can't modify the depends lists anymore. > How do Target groups and their targets contribute to the -p option? target-groups look exactly like a target. Stefan --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@ant.apache.org For additional commands, e-mail: dev-h...@ant.apache.org
