On Fri, Oct 31, 2008 at 05:07:04PM +0000, Shawn O. Pearce wrote:
> During the GitTogether we were kicking around the idea of a ground-up
> implementation of a Git library. This may be easier than trying
> to grind down git.git into a library, as we aren't tied to any
> of the current global state baggage or the current die() based
> error handling.
>
> I've started an _extremely_ rough draft. The code compiles into a
> libgit.a but it doesn't even implement what it describes in the API,
> let alone a working Git implementation. Really what I'm trying to
> incite here is some discussion on what the API looks like.
I know this isn't actually helping a lot to define the real APIs, but we
should really not repeat current git mistakes and have a really uniform
APIs, meaning that first we must decide:
* proper namespacing (e.g. OBJ_* looks like failure to me, it's a way
too common prefix);
* proper public "stuff" naming (I e.g. realy like types names -- not
struct or enum tags, that I don't really care -- ending with _t as
it helps navigating source.
* ...
And write that down _first_. It's not a lot of work, but it must be
done. Working on a library really asks us to create something coherent
for our users.
Second, if we want this to be a successful stuff, we all agree we must
let git be able to use it medium term. That means that when git-core is
experimenting with new interfaces, it will probably need to hook into
some more internal aspects of the library. This is a problem to solve
elegantly, linking git against a static library won't please a lot of
vendors and linux distributions, and exporting "private" symbols is a
sure way to see them being abused.
Last but not least, I believe parts of git-core are currently easy to
just take. For example, any code *I* wrote, I hereby give permission to
relicense it in any of the following licenses: BSD-like, MIT-like,
WTFPL.
For example, on parse-options.c, git blame yields:
git blame -C -C -M parse-options.c|cut -d\( -f2|cut -d2 -f1|sort|uniq -c
16 Alex Riesen
6 Jeff King
47 Johannes Schindelin
12 Junio C Hamano
19 Michele Ballabio
1 Nanako Shiraishi
1 Olivier Marin
395 Pierre Habouzit
Okay, arguably parse-options.c in libgit quite doesn't makes sense
(though it can help bringing some kind of uniformity to other git
ecosystem tools built on libgit but that's not the point I'm trying to
make), I'm sure this kind of pattern where it's likely to be easy to
relicense code happens to some source files. Nicolas already said I
think that he was okay with relicensing his work too e.g.
Maybe we could, in parallel to that, contact people who "own" code in
the core parts of git to ask them where they stand, and see if that can
free some bits of the code. Attached is the current owners of the non
builtin-* C, non header, code in git core, got using this on top of
next:
for i in *.c; do
case $i in
builtin-*)
continue;;
*)
git blame -C -C -M $i|cut -d\( -f2|cut -d2 -f1;;
esac
done
and doing sort | uniq -c | sort -n >owners on it is attached.
Interestingly, it yields around 200 contributors "only" but more
interestingly, only 41 people "own" more than 100 lines of code in
there, and 23 more if you add people with more than 50. IOW, it wouldn't
be absurd to mail those roughly 65 people ask them what they think of
relicensing their work (for those where it's needed because of current
GPL-ness of the code) and see what result it yields. Worst case we lost
like 2 or 3 weeks, best case scenario, we can reuse some bits of git to
reimplement some of the algorithms verbatim.
--
·O· Pierre Habouzit
··O madcoder@xxxxxxxxxx
OOO http://www.madism.org
16818 Junio C Hamano 8892 Linus Torvalds 4978 Johannes Schindelin 3664 Shawn O. Pearce 2938 Nick Hengeveld 2857 Nicolas Pitre 2455 Daniel Barkalow 1660 Pierre Habouzit 1294 Adam Simpkins 1126 Mike McCormack 1110 René Scharfe 861 Jeff King 653 Lukas Sandström 564 Miklos Vajna 531 Johannes Sixt 495 Alex Riesen 400 Martin Koegler 332 Petr Baudis 310 Jon Loeliger 263 Timo Hirvonen 236 Brandon Casey 231 Lars Hjemli 221 Sergey Vlasov 200 H. Peter Anvin 181 Dmitry Potapov 165 Mike Hommey 163 Matthias Lederhofer 158 Robert Shearman 155 Andreas Ericsson 151 YOSHIFUJI Hideaki 147 Franck Bui-Huu 137 Christian Couder 127 Stephan Beyer 127 David Reiss 123 Paolo Bonzini 120 Steffen Prohaska 115 Scott R Parish 113 Bradford C. Smith 109 Kristian Høgsberg 105 Heikki Orsila 100 Andy Whitcroft 93 Jim Meyering 90 Wincent Colaiuta 90 Julian Phillips 87 Stephen R. van den Berg 85 Marco Costalba 82 David Rientjes 76 Sven Verdoolaege 75 Eric Wong 72 Edgar Toernig 71 Ramsay Allan Jones 69 Martin Waitz 68 Mark Wooding 68 Eric W. Biederman 67 Geert Bosch 64 Michal Ostrowski 64 David Kastrup 63 Theodore Ts'o 63 Alexandre Julliard 61 Brian Downing 59 Alexander Gavrilov 58 Andy Parkins 56 Jon Seymour 52 Carlos Rica 47 Sean Estabrooks 44 Dana L. How 43 J. Bruce Fields 41 Ping Yin 40 Florian Forster 38 Tilman Sauerbeck 38 Serge E. Hallyn 38 Kay Sievers 38 Jason Riedy 37 Dustin Sallings 35 Nguyễn Thái Ngọc Duy 35 Luiz Fernando N. Capitulino 35 Clemens Buchacher 34 Fredrik Kuivinen 33 Pavel Roskin 33 Lars Knoll 32 Josef Weidendorfer 32 Jonas Fonseca 30 Peter Eriksen 28 Jay Soffian 26 Grégoire Barbier 25 Adam Roben 24 Marius Storm-Olsen 24 Luben Tuikov 24 Jürgen Rühle 24 Bryan Larsen 24 Anders Melchiorsen 23 Pieter de Bie 23 Nanako Shiraishi 23 Michael S. Tsirkin 23 Brian Hetro 22 Paul Mackerras 22 Jens Axboe 20 Thomas Rast 19 Paul Collins 19 Matthias Kestenholz 19 Joachim Berdal Haga 19 David Woodhouse 18 Mark Levedahl 17 Michele Ballabio 15 Gerrit Pape 14 Sam Vilain 13 Olivier Marin 13 Adam Brewster 12 SZEDER Gábor 12 Kai Ruemmler 12 Govind Salinas 11 Sasha Khapyorsky 11 Raphael Zimmerer 11 Brian Gernhardt 10 Steven Grimm 10 Holger Eitzenberger 10 Dmitry V. Levin 10 Dennis Stosberg 10 Avery Pennarun 9 Willy Tarreau 9 Santi Béjar 9 Robin H. Johnson 9 James Bowes 9 Björn Steinbrink 8 Markus Amsler 8 Jonathan del Strother 8 Johan Herland 8 Chris Parsons 8 Boyd Lynn Gerber 7 Robin Rosenberg 7 Paul Serice 7 Matt Kraai 7 Jason McMullan 7 Frank Lichtenheld 7 Christopher Li 6 Qingning Huo 6 Han-Wen Nienhuys 6 David Soria Parra 6 Björn Engelmann 6 Ariel Badichi 5 Sam Ravnborg 5 Peter Hagervall 5 Paul T Darga 5 Michal Vitecek 5 James Bottomley 5 Dotan Barak 5 David S. Miller 5 André Goddard Rosa 4 Uwe Kleine-König 4 Teemu Likonen 4 Samuel Tardieu 4 Patrick Welche 4 Michael Spang 4 Matthieu Moy 4 Joey Hess 4 Finn Arne Gangstad 4 Dmitry Kakurin 4 Carl Worth 4 Arjen Laarhoven 3 Steven Drake 3 Matthew Ogilvie 3 Li Hong 3 Josh Triplett 3 Jakub Narebski 3 Eygene Ryabinkin 3 Brian Gerst 2 Tom Prince 2 Todd Zullinger 2 Shawn Bohrer 2 Matthias Urlichs 2 Martin Sivak 2 Krzysztof Kowalczyk 2 Kevin Ballard 2 Jan Harkes 2 Fernando J. Pereda 2 Eyvind Bernhardsen 2 Deskin Miller 2 Charles Bailey 2 Andrew Ruder 2 Amos Waterland 2 Alp Toker 2 Alexey Nezhdanov 1 Yann Dirson 1 Tuncer Ayaz 1 Tony Luck 1 Timo Sirainen 1 Thomas Harning 1 Thomas Glanzmann 1 Sverre Hvammen Johansen 1 Stephan Feder 1 Simon Hausmann 1 Salikh Zakirov 1 Ryan Anderson 1 Rutger Nijlunsing 1 Randal L. Schwartz 1 Peter Valdemar Mørch 1 Paul Eggert 1 Patrick Higgins 1 Mika Kukkonen 1 Matt Draisey 1 Marco Roeland 1 Lars Doelle 1 Jerald Fitzjerald 1 Jean-Luc Herren 1 Jan Andres 1 Ingo Molnar 1 David Symonds 1 David Meybohm 1 Darrin Thompson 1 Bryan Donlan 1 Brad Roberts 1 Blake Ramsdell 1 Benoit Sigoure 1 Adeodato Simó
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