The Java Git library (also known as "jgit"[*1*]) is a 100% pure Java
implementation of a data access library for the Git on-disk data
structures, as well as a re-implementation of some commonly used
application functions such as history graph traversal/visualization
and network transport (fetch).
Since its inception on March 6, 2006 jgit has been under the
GPLv2 license. To make the library available to a wider audience
(including but not limited to the Eclipse Git plugin, numerous
Apache projects such as Ant/Maven, the Netbeans IDE, etc.) we are
switching to a dual license between a 3-clause BSD (the EDL[*2*])
and the EPL[*3*].
As of the bleeding edge (40c5c6cb11b8cc6caf3ea6a681caf0a6b8d66f36
[*4*]) the ownership of all currently surviving lines of code is
broken down as follows:
$ sh owner.sh
78% 27607 Shawn O. Pearce
17% 6061 Robin Rosenberg
4% 1518 Dave Watson
0% 4 Thad Hughes
0% 2 Roger C. Soares
------------------------------
100% 35192 total
Robin and Dave:
With 17% and 4% ownership, can you please reply to verify
this license change will be permitted for your contributions?
Please note this change is _only_ to jgit, and not to the egit
(Eclipse plugin) code.
Nico, Linus, Junio, Daniel, Dscho, et.al.:
We would appreciate it if you could provide a statement saying
you have no current copyright ownership interest in jgit, and that
you do not currently own nor invented any patents related to the
"Git technology" that this code might need to use to function as
a Git implementation.
Part of the application process for EGit to become a project
under the umbrella of the Eclipse Foundation[*5*] requires us
to be reasonably certain the source code we are contributing is
free of claims that could be brought by a 3rd party. A statement
from major contributors to C Git (those who created much of the
C implementation) would show those individuals have no claims
to bring against the current version of jgit, and that jgit is
therefore likely to be free of any IP claims.
There are three particular sections of jgit code that I would
like to bring to your attention before you respond:
* BinaryDelta[*6*] bears a striking simiarlity to patch-delta.c.
* PackFetchConnection[*7*] does what builtin-fetch-pack.c does.
* IndexPack[*8*] does what index-pack.c does.
Here (and everywhere else in jgit) we have tried to avoid directly
translating C->Java, but sometimes things just come out in a
similar way once expressed in source form. Knowing both the jgit
and C git code well I think these are the closest sections where
someone might suspect jgit copied code from C git. The attached
owner.sh script applied to those three files in C git came up
with the following major contributors:
33% 616 Nicolas Pitre
16% 304 Junio C Hamano
13% 241 Johannes Schindelin
10% 197 Sergey Vlasov
5% 107 Linus Torvalds
5% 105 Shawn O. Pearce
5% 94 Martin Koegler
3% 71 Daniel Barkalow
2% 40 Johannes Sixt
1% 36 Geert Bosch
*1* http://repo.or.cz/w/egit.git
*2* http://www.eclipse.org/org/documents/edl-v10.php
*3* http://www.eclipse.org/org/documents/epl-v10.php
*4* http://repo.or.cz/w/egit/spearce.git
*5* http://wiki.eclipse.org/EGit/Proposal
*6* http://repo.or.cz/w/egit/spearce.git?a=blob;f=org.spearce.jgit/src/org/spearce/jgit/lib/BinaryDelta.java;h=bba6b19a4000923abfe57b844bae17e7a03e0419;hb=40c5c6cb11b8cc6caf3ea6a681caf0a6b8d66f36
*7* http://repo.or.cz/w/egit/spearce.git?a=blob;f=org.spearce.jgit/src/org/spearce/jgit/transport/PackFetchConnection.java;h=c7fa66c0654eaf84c143e61ee4d11b74d73db28f;hb=40c5c6cb11b8cc6caf3ea6a681caf0a6b8d66f36
*8* http://repo.or.cz/w/egit/spearce.git?a=blob;f=org.spearce.jgit/src/org/spearce/jgit/transport/IndexPack.java;h=b6e5956f62fa8cb60770c991699ae7b457d8954f;hb=40c5c6cb11b8cc6caf3ea6a681caf0a6b8d66f36
--8< owner.sh --
#!/bin/sh
for f in $(git ls-files \
jgit \
org.spearce.jgit \
org.spearce.jgit.test \
| egrep -v '.(launch|pack|idx)$' \
| egrep -v ^org.spearce.jgit/lib/ \
)
do
git blame -C -C --whitespace "$f"
done | perl -e '
$total = 0;
while (<>) {
die "$_\n" unless
/^[0-9a-f]+ (?:[^)]+)?\((.*?) \d{4}-\d{2}-\d{2} /;
$n = $1;
$n =~ s/^\s+//;
$n =~ s/\s+$//;
$who{$n}++;
$total++;
}
@own = map {[$_, $who{$_}, $who{$_} * 100 / $total]} keys %who;
$fnd = 0;
foreach (sort {$b->[2] <=> $a->[2]} @own) {
$fnd += $_->[1];
printf "%3i%% %7i %s\n", $_->[2], $_->[1], $_->[0];
}
$unk = $total - $fnd;
print "-" x 30, "\n";
if ($unk > 0) {
printf "%3i%% %7i (unknown)\n", $unk * 100 / $total, $unk;
}
printf "%3i%% %7i total\n", 100, $total;
'
--
Shawn.
--
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