Re: [cdt-dev] Building with Maven

[Vladimir Prus <vladimir@xxxxxxxxxxxxxxxx>]

On Thursday, September 29, 2011 18:40:46 Schaefer, Doug wrote:
> To summarize my point in this discussion. The reason we went to Maven is so
> that everyone can build for themselves anywhere. Almost every vendor has
> patches they apply to CDT before releasing it downstream. Having a build
> system that can run anywhere is a key requirement that the previous releng
> scripts didn't allow (they were very tied to being run on
> build.eclipse.org).

That's certainly a good thing, and I agree that maven build from git checkout
runs much more smoothly than was the case with PDE scripts (it was quite
possible to do a local build, it just was a pain to setup).

> We have properties that allow you to point at alternative locations for the
> Eclipse Platform and TM dependencies. You should have what you need. If
> not, please propose changes.

I am about to play with Maven in near future. I am not really feel confident
I would be able to propose any changes, but at least I'll report any problems
there are.

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

> > -----Original Message-----
> > From: cdt-dev-bounces@xxxxxxxxxxx [mailto:cdt-dev-bounces@xxxxxxxxxxx]
> > On Behalf Of Schaefer, Doug
> > Sent: Thursday, September 29, 2011 10:17 AM
> > To: Vladimir Prus; cdt-dev@xxxxxxxxxxx
> > Subject: Re: [cdt-dev] Building with Maven
> > 
> > > -----Original Message-----
> > > From: Vladimir Prus [mailto:vladimir@xxxxxxxxxxxxxxxx]
> > > Sent: Thursday, September 29, 2011 7:53 AM
> > > To: Schaefer, Doug; cdt-dev@xxxxxxxxxxx
> > > Subject: Re: [cdt-dev] Building with Maven
> > > 
> > > 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.
> > 
> > Worry if you need. Contribute if you have a vested interest in it.
> > 
> > > > > > 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.
> > 
> > My point is that it shouldn't be noticeably slower than straight file
> > access. Unless you have evidence to the contrary.
> > 
> > > > 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.
> > 
> > I hope you're team isn't doing releng builds on a regular basis. If they
> > are, then you apparently do have a vested interest in contributing to
> > make things better.
> > 
> > > - Volodya
> > > 
> > > --
> > > Vladimir Prus
> > > CodeSourcery / Mentor Graphics
> > > +7 (812) 677-68-40
> > 
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