Sprints/2009-11

Report

http://blog.darcs.net/2009/11/darcs-hacking-sprint-3-report.html

Date and venue

When: 14-15 November 2009

Where:

Key information

  • twitter/identi.ca : #darcs
  • IRC: #darcs on irc.freenode.net
  • wiki: please jot down meeting notes, etc on this wiki!

Getting started

ASK QUESTIONS! SHOUT IF IT DOES NOT WORK

  1. install msmtp (use zetkin.htu.tuwien.ac.at if you need an SMTP server)

    from you@gmail.com 
user darcs09
password sprint09
host zetkin.htu.tuwien.ac.at
tls on
auth on
syslog on
tls_certcheck off

  2. grab darcs

    darcs get --lazy http://darcs.net darcs
cd darcs
echo "record no-test" >> _darcs/prefs/defaults 
echo "send sendmail-command msmtp -t %<" >> _darcs/prefs/defaults
echo "send edit-description" >> _darcs/prefs/defaults

  3. find a trivial bug to work on: http://code.haskell.org/darcs/hlint.html

    cd darcs
# hack hack hack
darcs record
darcs send

  4. see GettingStarted page

Progress

  1. hashed-storage: Windows bugs fixed
  2. hashed-storage warnings
  3. issue1244 - darcs convert

Prioritising for sprint (Friday)

Vienna: held discussions on the DeleteFile problem on Windows, upcoming list of priorities, probably easy bugs - Eric, Luca, Reinier, Petr, Salvatore

SVN support (Saturday)

  • Eric, Petr, Thomas.
  • non-reproducible : darcs get first
  • darcs pull
  • IRC: do we even want this?

Windows support meeting (Sunday)

  1. Official binary

  2. Better Windows distribution

    • installer
    • supported SSH tools: Tortoise SSH, putty-keygen
    • email support: msmtp-like tool

  3. Cygwin

    • don’t support until there is a GHC Cygwin
    • just use the official binary
    • TODO: document what works and doesn’t work

  4. Darcs send sucks

  5. Windows 7

    • need to find a buildslave

Darcs Roadmap

  • Darcs 2.4 priorities - things we can do now
  • Darcs 2.5 Windows installer and filecache work…

Winding up

How to make Darcs better

  • DEFINITELY do the top N list of probablyeasy bugs (that worked well)
  • send email with more precise instructions on getting darcs set up for sending patches
  • possible darcs hacking VM image
  • better mentoring: group mentoring session in the beginning, pairing people
  • encourage USB keyboards for pair programming
  • darcs sprint repo

Priorities

Target 2.4 Priorities

  1. hashed-storage : only use mmap for index and nothing else

    • does this fix the Windows bugs? [IT DOES! rejoice!]
    • does this significantly degrade performance [just curious?]

  2. does darcs-benchmark work on Windows?

  3. break global cache up into subdirectories

ProbablyEasy Priorities

Slightly more challenging, but still not too hard

Themes

All Darcs/Camp related work is welcome, but here are the two areas we will be focusing on.

  • Darcs 2.4 polish: Darned good hashed repositories

  • Haskell/Darcs training: Brush up on Haskell hacking on a real world open source project

    • Dedicated mentor(s) will be available

      • Salvatore Insalaco
      • Reinier Lamers
      • Eric Kow (tentative)

    • ProbablyEasy bugs

Helpers needed

  • At least one more mentor required (Eric can fill in otherwise)
  • Photographer (Portland)

Schedule

Friday (Vienna)

12:00 - Meet at Hotel Bristol Kärntner Ring 1, 1015 Vienna, Austria

16:30 - Meet at Hostel Ruthensteiner Robert Hamerling Gasse 24, 1150 Rudolfsheim-Fünfhaus

Saturday

09:00 - Arrival, settling in

09:30 - Hello! Introductions, pairing, bug tracker

10:00 - Hack time!

13:00 - Lunch/meetings?

14:30 - Hack time!

18:00 - Drinks, dinner?

Sunday

09:00 - Hack time!

13:00 - Lunch/meetings?

14:30 - Hack time!

16:30 - Roadmap planning meeting [Vienna]

17:30 - Wrap up, taking stock

18:00 - Drinks, dinner?

Upcoming meetings

Please add yourself if you’re interested in joining a chat :-) Nothing formal, really! Just making a note of things that would be nice to discuss

  • Eric, Thomas SVN integration [Saturday morning?]
  • Eric, Joachim darcswatch/roundup integration [Saturday afternoon?]
  • Eric, Salvatore, Reinier - what’s our Windows strategy? [Sunday afternoon?]
  • Everybody - planning the Darcs Roadmap [Sunday afternoon]
  • ??? - sorting out the darcs preferences [Sunday morning]

Vienna Attendees

  1. Joachim Breitner [arriving airport Sat 08:00, leaving Mon 18:10]
  2. Benedikt Huber (local team)
  3. Eric Kow [arriving airport Fri 10:20, leaving Mon (morning) 11:00]
  4. Reinier Lamers [arriving airport Fri 14:00, leaving Mon 14:00]
  5. David Markvica (local team)
  6. Petr Rockai [arriving to Westbahnhof around 4 PM on Fri, leaving from Südbahnhof at 7:28 AM on Mon]
  7. Radoslav Dorcik (Haskell beginner) [commuting from Bratislava]
  8. Salvatore Insalaco (mentor) [arriving airport Fri 09:05, leaving Sun 20:10]
  9. Matthias Fischmann [just arrived, my flight is leaving mon 6:30am]
  10. Thomas Danecker (local team)
  11. Christian Berrer (local team)
  12. Luca Molteni (Haskell beginner) [arriving airport Fri 09:05, leaving Sun 20:10]
  13. Federico Sudaro (Haskell beginner)
  14. Roman Plášil (beginner)
  15. Tomáš Caithaml [arriving Joseph-Roth-Gasse/Praterstern Fri 15:30]

Portland Attendees

  1. Jason Dagit (Call Jason via Google Voice)
  2. Don Stewart
  3. Josh Hoyt
  4. Thomas Hartman
  5. Thomas DuBuisson

Accommodation

Affordable hostels in Vienna:

Public Transport in Vienna

For 13,60€ you get a 72h ticket. All tickets are valid for the Underground and all the trains, trams and busses in Vienna (except some special sight-seeing busses and the like).

From the Airport you can take the Train S8 to Landstraße-Wien Mitte (don’t take the CAT [City Airport Train], this one has to be payed extra and isn’t really faster). From there you can take the U3 (Underground) to Westbahnhof which is 5 minutes from the Hostel Ruthensteiner.

You can get to the University of Technology by Underground (U1/U2/U4, Station Karlsplatz) or by Tram (1/62, Station Resselgasse).

Just use Google Maps to look for the fastest routes (by switching to “By public transport”).

Food