IronPython and Mono are very old. How can we get an update?

Christopher James Halse Rogers raof at
Thu Apr 7 23:37:39 UTC 2011

On Fri, Apr 8, 2011 at 2:31 AM, Vernon Cole <vernondcole at> wrote:
> On Thu, Apr 7, 2011 at 6:26 AM, chalserogers at
> <chalserogers at> wrote:
> [...]
>> Mono's upstream 2.10 release page suggests that they're shipping both
>> IronPython and IronRuby in the main mono distribution, but looking at
>> the source I can't find it, so I'm not sure what's happening there.
> IronPython and IronRuby are now building from the same source.
>> Regardless, Mono 2.10.1 is now available in Debian experimental, and
>> so will be available early on in the Oneiric (what will become Ubuntu
>> 11.10) development cycle.  Since we're very close to the end of the
>> Natty cycle upgrading to 2.10.1 presents too big a regression risk to
>> pull it in this time.
>> What needs to be done is to update the dlr-languages² source package.
>> This is maintained by the pkg-cli-libs team in Debian, and we sync it
>> across from there.  As we're well after Natty feature freeze, updating
>> in Natty would require a Feature Freeze exception¹.  As there seems to
>> be only one package with a(n optional) dependency on IronPython in the
>> archive it *might* be possible to get an FFe and have the new package
>> in the Natty release, it would be more reasonable to aim for Oneiric.
> One can RUN IronPython 2.7 on Mono 2.6.7, but not BUILD it,
> So I'm not sure how well an FFe would work.

Oh.  Yeah, that's not going to work then!

> I'm assuming that the
> build engine runs on the same Mono version as the release?

Yes.  The policy is that everything in the archive has to be built by
tools in the archive.

>  Perhaps we will need to maintain a .NET 2.0 compatible binary of IPy
> on the IronPython site until well after Debian releases with Mono 2.10
> under the hood.

Debian stable is going to have Mono 2.6.7 until the next release,
which is likely to be about 2 years away.  There's likely to be a
backport done, though, so it should (eventually) be reasonably easy
for Debian users to have Mono 2.10.  Ubuntu 11.10 will have Mono 2.10,
Ubuntu 11.04 won't - but, again, is likely to get *some* sort of
backport, even through a PPA.  Whether that makes it worth maintaining
a 2.0-compatible IPy is up to you :).

>> If you'd like help in the mechanical process of updating the package,
>> the Ubuntu packaging guide³ has a good rundown, or feel free to ask -
>> IRC #debian-cli on is friendly and generally active.  Since
>> it looks like dlr-languages is one of the more complex things to
>> package, I could probably find the time to update it in the next month
>> or so if you're not comfortable with the process.
> ¹:
> ²:;a=summary
> ³:
> Okay, I just looked at the link, and would require a month or so for
> me to figure out how to do it. I have been a bit hesitant about
> changing things I don't understand, ever since I crashed the Internet
> in several neighboring states by incorrectly updating a gateway
> router. (Long story, and the Internet was much smaller then.) So, yes,
> please make those changes when you can.  :-)

Well, we'd be reviewing and sponsoring your changes, so if you *did*
break the Internet again it'd be our fault :).

> Make sure that the source is coming from github, not codeplex.
> I'll see that the build patches get into a new tarball, They are now
> in the git trunk but not backported to the 2.7 maintenance branch yet.
> How often do you fetch a new tarball?

As often as the maintainer feels like it.  For well maintained
packages (here's where you can come in ☺) that's generally once per
upstream release, unless there's some problem - like it not being
buildable against Mono 2.6.7 :).

There's a certain amount of impedance mismatch between Debian and
predominantly-Windows upstreams like Iron*, but that's something that
can largely be worked around.  The biggest problem is probably the
different IronPython/IronRuby release schedules which mean we can't
have IronPython 2.7 and IronRuby 1.0 unless we have two different
source packages, and even then there's the problem of the shared DLR

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