[ocaml-platform] OCamlot

[Mike Lin]

Thanks Anil for coloring in so much detail. Clearly this is actually a lot
more ambitious than my conception of Travis with more OSes :)
I'll look forward to seeing how it all comes together.
Mike



On Wed, Feb 13, 2013 at 2:53 PM, Anil Madhavapeddy <avsm2 at cl.cam.ac.uk>wrote:

> On 13 Feb 2013, at 22:42, Anil Madhavapeddy <avsm2 at cl.cam.ac.uk> wrote:
>
> > Opamalot is more of a coordination service.  It interfaces with OPAM to
> get the (non-trivial) package database, version constraints and compiler
> variants out of it, and comes up with a prioritised schedule of builds and
> tests that need to be run on different platforms.  Some of these could (and
> should) run on third-party hosted services such as Travis, just to get some
> diversity.  Others, however, really require a Xen pool so that more exotic
> stuff can be done.
>
> It's also worth noting the difference in execution speeds for adopting a
> copy-on-write approach.  We  need to test 300+ packages (which will grow)
> across 3.12.1/4.00.0/4.00.1/4.01.0dev and experimental compiler branches,
> ideally without recompiling the compiler for each package.  If a package
> fails to build on a fast architecture (x86), it should immediately be
> dropped from a slow one.
>
> When Jane Street issues a pull request for a new version of Core [1] we
> need to run these tests quickly to avoid holding up the release and
> prioritise that over other pull requests, since it's a high risk patch that
> touches a lot of other packages.
>
> It's certainly possible to code this up in Travis, but it's certainly not
> part of the standard continuous build service (unless one of these does
> offer this -- I would be delighted to be corrected).
>
> I tried building it as a Jenkins plugin, but frankly, life's too short for
> that.  I can't even get the Jenkins port to install on FreeBSD 9.1/amd64
> due to some OpenJDK/JIT compile error.  And the Raspberry Pi is in even
> worse shape with a big hunk of RAM taken up by a Jenkins worker.
>
> -anil
>
>
> [1] https://github.com/OCamlPro/opam-repository/pull/382
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