Re: [cdt-dev] Building with Maven

[Vladimir Prus <vladimir@xxxxxxxxxxxxxxxx>]

On Wednesday, September 28, 2011 20:56:41 Schaefer, Doug wrote:
> > -----Original Message-----
> > From: Vladimir Prus [mailto:vladimir@xxxxxxxxxxxxxxxx]
> > Sent: Wednesday, September 28, 2011 12:25 PM
> > To: Schaefer, Doug; cdt-dev@xxxxxxxxxxx
> > Subject: Re: [cdt-dev] Building with Maven
> > 
> > On Wednesday, September 28, 2011 18:55:36 Schaefer, Doug wrote:
> > > Reproducibility of maven builds is a hot topic in the community right
> > > now. Freezing .m2 is a common approach that's being proposed.
> > 
> > Oh, so there's no official approach right now? Ehm.
> 
> No. There's never been anything really official about Eclipse releng to
> begin with. Vendors who redistribute Eclipse generally deal with these
> requirements in their own way. And given the promise of API stability, I'm
> not sure how large of an affect we're talking about here.

I kinda understand that with limited resources, pushing releng onto vendors
might be reasonable, but this is obviously not a good idea in general, so
I'm worried that you seem to think it's OK.
 
> > > Another option is to create a local mirror of the dependencies for CDT
> > > and set the properties listed in the top level pom.xml file to point
> > > at them instead of the default. It's pretty easy to create p2 mirrors
> > > these days (google for it). And use -D on the mvn command line to
> > > override the properties.
> > 
> > I imagine this will work, but having maven "download" things from file://
> > repository sounds like a way to slow down already slow down build :-(
> 
> Not sure I get you. file:// should be pretty fast since it doesn't go over
> a network connection. 

Unless file:// is actually an NFS share.

> And I'm not sure I'd characterize the builds as
> slow. Including running all the tests, the builds only take 40 minutes on
> Hudson.

That counts as slow in my book. In our current environment, building CDT
takes a few minutes (without tests), which is important for productivity.

- Volodya

-- 
Vladimir Prus
CodeSourcery / Mentor Graphics
+7 (812) 677-68-40