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svn diff: properties?

From: C. Scott Ananian <cananian_at_lesser-magoo.lcs.mit.edu>
Date: 2001-09-06 21:19:32 CEST

OK, here's a quick note regarding .svnignore *properties* instead of
files.

As svn depends more and more on *properties* on files, it seems that it
would be nice to have a standard patch-esque way of distributing property
changes on mailing lists & etc. For example, I've got a patch outstanding
that adds a new 'date-test' program to subversion/tests/libsvn_subr. In
the 'old' version of my patch I included an extra line to .cvsignore to
ignore this generated executable; currently I could add the line to
.svnignore --- but how would I do this in the new properties-enabled
world?

I think that, to maximally enable collaboration, it would be great if we
provided a sort of patch++ format that could handle these sorts of
contributions. One possibility would be to create special 'filenames' for
the properties (say, foo/svn:ignore for a property of foo) and pipe the
patch output through svn. svn could dump the properties to the special
files, then run 'normal' patch, then re-slurp the properties from the
special files and clean up.

I'm sure there are more elegant ideas for how this might be done. But I
think it's important to think about. 'patch' is a terrific tool, but it
doesn't handle properties well. How do we address this?
 --s

for Dummies supercomputer fissionable Rijndael Hussein North Korea
TASS Cocaine mustard payment NRA Legion of Doom Semtex NSA Honduras
              ( http://lesser-magoo.lcs.mit.edu/~cananian )
 --
 "These students are going to have to find out what law and order is
 all about." -- Brig. General Robert Canterbury, Noon, May 4, 1970,
 minutes before his troops shot 13 unarmed Kent State students, killing 4.
 --
            [http://www.cs.cmu.edu/~dst/DeCSS/Gallery/]
#!/usr/bin/perl -w
# 526-byte qrpff, Keith Winstein and Marc Horowitz <sipb-iap-dvd@mit.edu>
# MPEG 2 PS VOB file on stdin -> descrambled output on stdout
# arguments: title key bytes in least to most-significant order
$_='while(read+STDIN,$_,2048){$a=29;$c=142;if((@a=unx"C*",$_)[20]&48){$h=5;
$_=unxb24,join"",@b=map{xB8,unxb8,chr($_^$a[--$h+84])}@ARGV;s/...$/1$&/;$d=
unxV,xb25,$_;$b=73;$e=256|(ord$b[4])<<9|ord$b[3];$d=$d>>8^($f=($t=255)&($d
>>12^$d>>4^$d^$d/8))<<17,$e=$e>>8^($t&($g=($q=$e>>14&7^$e)^$q*8^$q<<6))<<9
,$_=(map{$_%16or$t^=$c^=($m=(11,10,116,100,11,122,20,100)[$_/16%8])&110;$t
^=(72,@z=(64,72,$a^=12*($_%16-2?0:$m&17)),$b^=$_%64?12:0,@z)[$_%8]}(16..271))
[$_]^(($h>>=8)+=$f+(~$g&$t))for@a[128..$#a]}print+x"C*",@a}';s/x/pack+/g;eval

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Received on Sat Oct 21 14:36:40 2006

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