[RFC] git fs translator

[Shakthi Kannan]

Hi,

This is in regard to a prototype implementation of gitfs translator
for a student project. The idea is to write a simple translator that
can query results from a remote git repository.

* Which lib*fs translator can be used for this? cvsfs has been written
earlier using libnetfs.

* Using gitweb, one can obtain the repo details from the URL. So, is
the following flow acceptable?

  gitfs translator->libcurl (HTTP request)->gitweb->HTTP response

Appreciate any inputs in this regard,

Thanks!

SK

-- 
Shakthi Kannan
http://www.shakthimaan.com

Re: [RFC] git fs translator

[Carl Fredrik Hammar]

Hi,

On Sun, Dec 20, 2009 at 02:49:19PM +0530, Shakthi Kannan wrote:
> 
> This is in regard to a prototype implementation of gitfs translator
> for a student project. The idea is to write a simple translator that
> can query results from a remote git repository.
> 
> * Which lib*fs translator can be used for this? cvsfs has been written
> earlier using libnetfs.

Yes, libnetfs would be the one.

> * Using gitweb, one can obtain the repo details from the URL. So, is
> the following flow acceptable?
> 
>   gitfs translator->libcurl (HTTP request)->gitweb->HTTP response
> 
> Appreciate any inputs in this regard,

Perhaps I'm missing something as I don't know the details well enough,
but why not maintain a temporary repository where you fetch (only) the
needed repo objects on demand with the usual git commands, or perhaps
the more low-level commands?

Seems much more straightforward to me.

Regards,
  Fredrik

Re: [RFC] git fs translator

[Shakthi Kannan]

Hi,

--- On Sun, Dec 20, 2009 at 7:43 PM, Carl Fredrik Hammar
 wrote:
| but why not maintain a temporary repository where you fetch (only) the
| needed repo objects on demand with the usual git commands, or perhaps
| the more low-level commands?
\--

Sorry, which git commands or low-level commands are you referring to
here? Are you referring to using git for-each-ref or git cat-file?

SK

-- 
Shakthi Kannan
http://www.shakthimaan.com

Re: [RFC] git fs translator

[Carl Fredrik Hammar]

Hi,

On Sun, Dec 20, 2009 at 07:47:27PM +0530, Shakthi Kannan wrote:
> 
> --- On Sun, Dec 20, 2009 at 7:43 PM, Carl Fredrik Hammar
>  wrote:
> | but why not maintain a temporary repository where you fetch (only) the
> | needed repo objects on demand with the usual git commands, or perhaps
> | the more low-level commands?
> \--
> 
> Sorry, which git commands or low-level commands are you referring to
> here? Are you referring to using git for-each-ref or git cat-file?

I'm not really familiar with the commands for for fetching and accessing
individual objects so I can't be specific.  I'm mostly just speculating.
:-)

But git cat-file seems like a good candidate once object have been fetched
to the local repository.  I'd suggest git fetch to actually transfer the
objects from the remote repository, but I can't tell from the man-page
whether it can be used for all types of objects or just refs...

Regards,
  Fredrik

Should trivfs.h include fcntl.h?

[olafBuddenhagen]

Hi,

While trivfs.h doesn't use any definitions from fcntl.h itself,
trivfs_allow_open takes values like O_READ, which are defined in fcntl.h
-- so a program including trivfs.h will generally need these definitions
as well. Thus I wonder whether trivfs.h shouldn't just include fcntl.h,
so they are always available?

(Admittedly, this logic is not generally applied to libc headers
either...)

-antrik-

[rev...@gmail.com: Call for participation to the "Alt-OS" devroom at FOSDEM]

[olafBuddenhagen]

Hi,

I'm going -- who else? :-)

-antrik-

- Forwarded message from mmu_man  -

Date: Thu, 10 Dec 2009 15:56:17 -0800 (PST)
From: mmu_man 
To: Rosetta 
Subject: Call for participation to the "Alt-OS" devroom at FOSDEM
Reply-To: rosetta...@googlegroups.com

During the previous edition of the Free and Open Source Software
Developer's European Meeting (FOSDEM) , several
alternative FOSS Operating System projects (Haiku , ReactOS ) shared booths, but there were
discussions about going beyond presenting each projects on its own,
and instead seek cooperation. Recently, at the Google Summer of Code
mentor summit, other OS projects gathered and formed the Rosetta OS
group  to work on driver
sharing.

This year, the FOSDEM (in Brussels, 6-7th February 2010) will host the
"Alt-OS" devroom on sunday from 9:00 to 17:00, organized by members of
the Rosetta OS project.

This devroom is meant as a place for Free and OpenSource Alternative
Operating System projects to share ideas and work on topics like:
 * distinguishing design and features,
 * device drivers and how to share them,
 * sharing code for internal components,
 * internal usage of other FOSS projects to build upon,
 * application portability,
 * interoperability,
  * file formats,
  * extended attributes...

We are interested to hear about your OS projects, how they are
designed, and what they could eventually share for other projects'
benefit.
In addition to all FOSS OS projects, any application project that is
seeking new target platforms is invited. Featured projects will
include participants from the Rosetta OS project which charter  matches our
devroom goal.

As time allows, we are also interested in transversal subjects in
cooperation with other devrooms. As an example, possible topics could
include:
 * unusual package management with the Crossdistro room,
 * standardization of GUI elements and behavior with the Crossdesktop
devroom,
 * scalability with the Embedded devroom,
 * ways in which BSD drivers were reused in your project,
 * concerns about porting Java,
 * Gallium3D port progress reports...

The format of the talks can vary, from 45min large speech to 15 min
general project presentation, or hand-on hacking session.

= Proposals =

Proposals should be sent to François Revol by mail: revol AT free DOT
fr

Your proposal should include:
 * duration (in 15 minute blocks -- please stick with that
granularity, as it will make the schedule somewhat easier to follow
for visitors),
 * activity title (please try to be descriptive, there are ~250 talks
at FOSDEM during the week-end ;)),
 * a short abstract (1-2 paragraphs),
 * a longer description if appropriate,
 * optionally a list of links to the project website or similar
 * for each speaker:
  * the speaker's real name,
  * a short overview of her bio in a couple of lines,
  * optionally also a longer bio,
  * optionally a picture (please send it to us as 128x128 PNG),
  * optionally links to her website, blog, ...

Plain-text format is preferred by the FOSDEM team, it makes their life
easier, something like:

--
John Doe
john@example.org

John is currently working as a freelancer and spends most of his free
time contributing to various opensource projects, most prominently on
libjohndoe.

John currently lives in England with his wife, 2 kids and a bunch of
kitten. He loves spending his time walking around in the woods, and
of course kitten. He has a masters degree in kitten science, which
helps him a lot with coding.

blog: http://johndoe.example.org/blog/
attached: john_doe.png
--

= Deadline =

The deadline for submissions is 2009-12-25, please try to stick to it.
Acceptance notification on 2009-12-31.

= Organization =

The room provided by the FOSDEM team has:
 * room number AW1.105 with 48 seats,
 * a video projector with VGA cable,
 * wireless internet.
We will try to provide a wifi router with ethernet ports for
demonstrations since we know many projects do not have functional wifi
drivers yet.
We will also try to provide a laptop to load your slides on if you
can't use your own machine.

It is advised to see with your project supporting associations for
possible reimbursement of travel and hosting cost, since the FOSDEM
team cannot help there. Attendance is free however.
Also remember to check other devroom calls as well as the call for
lightning talks , for
subjects that might not fit our topics of interest.

= Projected schedule =


 9:00   Welcome (15min)
 9:15   "Rosetta OS" project
morning project presentations, design...
afternoon   more projects, workshops...
16:45   Closing (15min)

- End forwarded message -

Re: Should trivfs.h include fcntl.h?

[Carl Fredrik Hammar]

Hi,

On Sun, Dec 20, 2009 at 06:40:10PM +0100, olafbuddenha...@gmx.net wrote:
> 
> While trivfs.h doesn't use any definitions from fcntl.h itself,
> trivfs_allow_open takes values like O_READ, which are defined in fcntl.h
> -- so a program including trivfs.h will generally need these definitions
> as well. Thus I wonder whether trivfs.h shouldn't just include fcntl.h,
> so they are always available?
> 
> (Admittedly, this logic is not generally applied to libc headers
> either...)

I generally agree that all headers needed to use a library should be
included in its header.  But by that logic we should push it down to
fshelp.h, then we'll get it in diskfs.h and netfs.h as well.  I'd say
put it in iohelp.h as well, but surprisingly it seems that none of its
functions deal with open modes.

Regards,
  Fredrik