[jbosstools-dev] Content and usage of target platforms (was Re: New mechanism for target=platforms)

[Mickael Istria]

On 09/13/2012 11:26 PM, Denis Golovin wrote:
> For me as a developer .target file is the window to update sites. This 
> window lets in only those versions of bundles/feature we can use in 
> development. For JBT it is features/bundles released for Juno 4.2.0 
> because I really would like to avoid issues like 
> https://issues.jboss.org/browse/JBIDE-12248 (JBoss Tools (Indigo) 
> Installation from Eclipse Marketplace fails for Eclipse Indigo 3.7.0 
> and 3.7.1). All these means .target file for JBT 4.0.x should not be 
> changed much. The only reason to change it is to add some new 
> dependency(ies) to it and those dependencies should have versions 
> released for 4.2.0 for the same reason explained above.
>
> Could someone explain what are these unified/local/multiple targets 
> below used for? It looks like they point out to latest version of 
> Juno, which would not let to use them in development process.
Hi Denis,

This change we're about to make does not affect the content (plugins and 
features) of the target-platform. Instead it affects what is the process 
to publish a new platform.
I agree with you that the less often .target change for JBT, the less 
often we may have issues.
However, it's not the same for JBDS, for which we want the 
latest/greatest/stablest version of Eclipse.

You note probably highlight the need for 2 target-platforms: the 
"minimal compatibiliy" for JBT, and the "Best and greatest" for JBDS.

About the file we have, I sent some mails a few month ago on this topic, 
I'll try to sum it up:
* multiple.target: points to the composite target site, good to use 
inside IDE with PDE since it also contains source (PDE is greedy and 
also finds sources from the composite)
* local.target: if you want to perform lots of local build and save 
time, just run "mvn install" on local.target, you'll get all the TP repo 
locally, and you'll be able to consume it in your builds using the 
-Plocal.target profile. Not that this target is probably going to be 
replaced by Maven mirrors as soon as Tycho 0.16 is resolved: 
https://issues.jboss.org/browse/JBIDE-12608
* unified.target: resolves against the aggregated target site. It's the 
one we recommand for "sporadic" local builds.

HTH
-- 
Mickael Istria
Eclipse developer at JBoss, by Red Hat <http://www.jboss.org/tools>
My blog <http://mickaelistria.wordpress.com> - My Tweets 
<http://twitter.com/mickaelistria>
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