Re: darcs hacking sprint #6 (march, april or may 2011)

I just had the confirmation that the IRILL can host us on April 1st,
2nd and 3rd, an extended weekend that got a consensus on IRC.
I updated the page http://wiki.darcs.net/Sprints/2011-04 .

Now it would be nice to:

* have more attendees   Eric, could you write a followup mail on
haskell-cafe?
* know how much money we have to pay for people's transportation.
* start using the wiki page to plan the topics we will discuss/try to
address during the sprint. (Everyone!)

Guillaume

darcs hacking sprint #6 (1-3 April, Paris)

Hi everybody,

Following up on my last message, the date and venue for the sixth Darcs
Hacking sprint has been confirmed.

Get out your berets everybody, because we're going to Paris!

Here are three things to know

1. Everybody is welcome to join us.  We'd love to have you, whatever
   your Haskell or Darcs hacking experience.  Also, if you've got a
   wacky idea for the future of version control, or a cool use for the
   Darcs library, you should join us too 

2. Please let us know if you're attending.  Just add your name to
   http://wiki.darcs.net/Sprints/2011-04 and you're good to go.
   You can also send us an email.

3. We can reimburse travel costs (within reason!).  Let us know if you'd
   like a reimbursement, and save your receipts.

   Many thanks to everybody who participated in our fundraising drives
   or who gave money on the side.  Thanks also to the Software Freedom
   Conservancy for making fundraising and reimbursements so painless!
   If you can't join us in person, but you'd like to cheer us on,
   say hello at http://darcs.net/donations.html!

Looking forward to seeing you!

Eric

sprint - should we reimburse accommodation?

Hey darcs-users,

This came up when planning travel for the 2011-04 sprint, so I'd like
to discuss policy a bit.

We currently reimburse travel costs only, leaving accommodation to be
up to the individual.  What do you think about reimbursing accommodation
as well?  The usual principle of "be reasonable" would apply (so please
stay at a hostel).  This would reduce the cost efficiency of our
sprints, but it would also widen access to students and what not.

Anybody with experience in other projects care to comment?
If nobody objects, I think we should try and see what happens.

Thanks,

PS: To be transparent about this, I should say that I've recently
    switched to claiming back travel costs myself and would likely
    also claim hostel costs too.

--

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Re: sprint - should we reimburse accommodation?

I'd like to see this happening. What about setting a baseline amount
of refund per hostel night? Say, something like 30€.

Guillaume
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Re: sprint - should we reimburse accommodation?

On Mon, Mar 07, 2011 at 09:27:33PM +0100, Guillaume Hoffmann wrote:
> I'd like to see this happening. What about setting a baseline amount
> of refund per hostel night? Say, something like 30€.

This is very cheap for a hostel in (or even near) Paris.  Even youth
hostel are more expensive, I think.  50€ would be more realistic, IMHO.

Anyway, better 30€ than nothing.
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Darcs segfault

Hi all,

I've just scp (secure copied) a darcs repo from an powerpc-linux
(big endian) machine to a x86_64-linux machine (little endian)
and now "darcs whatsnew -s" is segfaulting (strace below).

Is this a known
issue?

Cheers,
Erik

stat("_darcs/pristine.hashed/0000003820-105a9fa0c2cd3b46f41cfbf3be3eda001c425cd9a505397efc717f796671075d",
{st_mode=S_IFREG|0640, st_size=2140, ...}) =
0
open("_darcs/pristine.hashed/0000003820-105a9fa0c2cd3b46f41cfbf3be3eda001c425cd9a505397efc717f796671075d",
O_RDONLY|O_NOCTTY|O_NONBLOCK) = 5
fstat(5, {st_mode=S_IFREG|0640, st_size=2140, ...}) = 0
fcntl(5, F_GETFL)                       = 0x8800 (flags O_RDONLY|O_NONBLOCK|O_LARGEFILE)
ioctl(5, SNDCTL_TMR_TIMEBASE or TCGETS, 0x7fffa952da00) = -1 ENOTTY (Inappropriate ioctl for device)
fstat(5, {st_mode=S_IFREG|0640, st_size=2140, ...}) = 0
read(5,
"\37\213\10\0\0\0\0\0\0\3]\227\331n\\\307\21\206\357\371.\207\350}\361\235\242\20\261a[\t"...,
8192) = 2140
close(5)                                = 0
getcwd("/Other/erikd/Haskell/ghc-upstream", 4096) = 34
chdir("/Other/erikd/Haskell/ghc-upstream") = 0
open("_darcs/patches/pending", O_RDONLY|O_NOCTTY|O_NONBLOCK) = 5
fstat(5, {st_mode=S_IFREG|0640, st_size=4, ...}) = 0
fcntl(5, F_GETFL)                       = 0x8800 (flags O_RDONLY|O_NONBLOCK|O_LARGEFILE)

Re: Darcs segfault

Erik de Castro Lopo wrote:

> I've just scp (secure copied) a darcs repo from an powerpc-linux
> (big endian) machine to a x86_64-linux machine (little endian)
> and now "darcs whatsnew -s" is segfaulting (strace below).
> 
> Is this a known issue?

Sorry, darcs 2.4.4 from Debian.

Erik
--

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----------------------------------------------------------------------
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Re: Darcs segfault

On Wed, 9 Mar 2011, Erik de Castro Lopo wrote:

> Erik de Castro Lopo wrote:
>
>> I've just scp (secure copied) a darcs repo from an powerpc-linux
>> (big endian) machine to a x86_64-linux machine (little endian)
>> and now "darcs whatsnew -s" is segfaulting (strace below).
>>
>> Is this a known issue?
>
> Sorry, darcs 2.4.4 from Debian.

Almost certainly caused by _darcs/index - try just removing that.

I'm not sure if later versions make a check on endianness/bit size before 
reading the file, but we should add one if not.

Ganesh

Re: Darcs segfault

Ganesh Sittampalam wrote:

> On Wed, 9 Mar 2011, Erik de Castro Lopo wrote:
> 
> > Erik de Castro Lopo wrote:
> >
> >> I've just scp (secure copied) a darcs repo from an powerpc-linux
> >> (big endian) machine to a x86_64-linux machine (little endian)
> >> and now "darcs whatsnew -s" is segfaulting (strace below).
> >>
> >> Is this a known issue?
> >
> > Sorry, darcs 2.4.4 from Debian.
> 
> Almost certainly caused by _darcs/index - try just removing that.

Yes, that fixed it. Thanks.

> I'm not sure if later versions make a check on endianness/bit size before 
> reading the file, but we should add one if not.

Yes, that is a bug that I would love to see fixed.

Erik
--

-- 
----------------------------------------------------------------------
Erik de Castro Lopo
http://www.mega-nerd.com/

darcs weekly news #84

News and discussions
--------------------
1. The next Darcs Hacking Sprint will take place on April 1st, 2nd and 3rd
   in Paris:

   * http://wiki.darcs.net/Sprints/2011-04
   * http://www.haskell.org/pipermail/haskell-cafe/2011-March/089866.html
   * http://www.irill.org/events/darcs-sprint

2. A comparison between Wave and Darcs was posted:

   * http://lesswrong.com/lw/4nt/what_are_you_working_on/3mnv?context=3

Issues resolved in the last week (0)
------------------------------------

Patches applied in the last week (27)
-------------------------------------
2011-02-23 Guillaume Hoffmann
 - put repair implementation in Darcs.Commands.Check
 - test for get, pull and send support for OF repos

2011-02-14 Ganesh Sittampalam
 - tar on mingw seems to think c: introduces an ssh path

2011-02-15 Guillaume Hoffmann
 - remove bench dir since benchmarks have been externalised
 - remove unused stringify.hs
 - move manual .tex files from src to doc/src
 - remove irrelevant microbench.hs