[emft-dev] Creating a Build-From-HEAD build stack (was Re: Build infrast

[Nick Boldt <nickboldt@xxxxxxxxx>]

> 1) Is it possible to tell the infrastructure that whenever there is a 
> change in the repository the corresponding build should be triggered 
> (like one usually does with e.g. cruise control)?

With the current system, your options are RSS feed watching or scheduled 
builds with sufficient delays between them. The four tied project 
MDT-OCL EMF-Query, EMF-Validation and EMF-Transaction employ a 
structured schedule so that they build in series and always adopt the 
latest version in the stack.

> 2) Is it possible for the build of Xtext to wait for running builds of 
> MWE and Xpand, so that it starts when all dependencies are available?

For Build A to "listen" for Build B, you can set up a process to watch 
Build A's RSS feed. It's a bit cumbersome as currently built (because it 
doesn't use Ant Contrib), but it is doable. I can provide more 
information if you would like.

http://wiki.eclipse.org/Eclipse_Build_Available_RSS_Feeds
http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.releng.basebuilder/plugins/org.eclipse.build.tools/scripts_rss/feedWatch.xml?revision=1.1.2.4&content-type=text%2Fplain&pathrev=releng_test

> 1) We would like to get feedback as soon as possible (right after check-in).

You mean CVS commit notification? Set up Eclipse like this:

a) check out projects (or the whole CVS tree) into your workspace
b) Team > Synch
c) set a schedule to check for updates

> 2) We need to develop against the HEAD of MWE and Xpand and therefore 
> the build should run against the same version.

See above - if your regex is set correctly in 
/www/modeling/../../build/_common.php, you can schedule the stack of 
builds to run one after another in series. The only caveat here is that 
the -a or -addSDK flag must be enabled so that Build A will add itself 
into the /home/www-data/build/requests/dependencies.urls.txt file and 
can thus be found by Build B.

Crontab examples abound.

> We as well work against the head of EMF, btw.

That's a little trickier because EMF builds on modeling.eclipse.org, not 
emft.eclipse.org, so the -addSDK trick won't work. You'll have to add 
EMF to the list manually.

Once we move to the new Hudson-based Athena build [1], you will be able 
to have builds push other (downstream) builds, and builds listen for 
upstream builds. The Galileo build is actually 4 steps, which run in 
series. The same will be possible for the Modeling stack... once we get 
there. In the meantime, it's rss feeds and crontabs. :)

[1] http://wiki.eclipse.org/Build_Workshop_Report

--
Nick Boldt :: http://wiki.eclipse.org/User:Nickb
Release Engineer :: Eclipse Modeling & Dash CBI