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Re: git on MacOSX and files with decomposed utf-8 file names

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From: Peter Karlsson <peter@...>
To: Linus Torvalds <torvalds@...>
Cc: Mark Junker <mjscod@...>, Pedro Melo <melo@...>, git@vger.kernel.org <git@...>
Subject: Re: git on MacOSX and files with decomposed utf-8 file names
Date: Friday, January 18, 2008 - 6:19 am

Linus Torvalds:


But they are not different strings, they are canonically equivalent as
far as Unicode is concerned. They're even supposed to map to the same
glyph (if the font has an "ä", it should display it in both cases, if
it has an "a" and a combining diaeresis, it should make up one).

You cannot do a binary comparison of text to see if two strings are
equivalent.


Whereas you are confusing characters and code points.

"ä" and "a¨" use different code points, but they encode the same
character, and from the user's perspective it is the *character* that
is interesting (although he might confuse it with the glyph).



Actually, NTFS is a bit broken. It sees file names as a string of
16-bit words. It doesn't check that it is valid UTF-16, or even valid
UCS-2, it allows almost anything.


Apple made Mac OS X handle filenames properly, by seeing that file
names are a string of characters, not code points, so they use a
canonical form for all characters (personally, I would have preferred
the pre-composed form, though).

-- 
\\// Peter - http://www.softwolves.pp.se/
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Messages in current thread:
git on MacOSX and files with decomposed utf-8 file names, Mark Junker, (Wed Jan 16, 11:17 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Wed Jan 16, 11:34 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Wed Jan 16, 11:43 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Miles Bader, (Thu Jan 17, 3:29 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Wincent Colaiuta, (Wed Jan 16, 7:03 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Wed Jan 16, 12:32 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Jakub Narebski, (Wed Jan 16, 12:46 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Wed Jan 16, 4:39 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Wed Jan 16, 7:52 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Jakub Narebski, (Wed Jan 16, 5:51 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Wed Jan 16, 6:06 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Wed Jan 16, 6:23 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Wed Jan 16, 7:16 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Wed Jan 16, 6:32 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Wed Jan 16, 6:52 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Wed Jan 16, 7:11 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Wed Jan 16, 7:38 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Pedro Melo, (Wed Jan 16, 7:57 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Wed Jan 16, 8:16 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Peter Karlsson, (Fri Jan 18, 4:29 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Jakub Narebski, (Fri Jan 18, 7:16 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Pedro Melo, (Wed Jan 16, 8:27 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Wed Jan 16, 8:35 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Pedro Melo, (Wed Jan 16, 8:45 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, David Kastrup, (Wed Jan 16, 8:32 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Pedro Melo, (Wed Jan 16, 8:40 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Wincent Colaiuta, (Wed Jan 16, 8:54 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Wed Jan 16, 9:08 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Wed Jan 16, 9:41 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Thu Jan 17, 12:07 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Wed Jan 16, 8:09 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Wed Jan 16, 9:16 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Wed Jan 16, 11:52 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Thu Jan 17, 12:08 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Wincent Colaiuta, (Thu Jan 17, 6:08 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Thu Jan 17, 12:43 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, JM Ibanez, (Thu Jan 17, 6:01 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Thu Jan 17, 6:09 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Robin Rosenberg, (Thu Jan 17, 9:27 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Thu Jan 17, 7:05 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Thu Jan 17, 7:10 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Mark Junker, (Thu Jan 17, 2:09 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Thu Jan 17, 2:42 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Pedro Melo, (Thu Jan 17, 2:52 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Thu Jan 17, 3:11 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Peter Karlsson, (Fri Jan 18, 6:19 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Fri Jan 18, 1:11 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Peter Karlsson, (Mon Jan 21, 10:14 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Mon Jan 21, 2:16 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 12:43 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Mon Jan 21, 4:30 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Mon Jan 21, 2:12 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Mon Jan 21, 4:36 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Martin Langhoff, (Mon Jan 21, 5:06 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, David Kastrup, (Mon Jan 21, 5:09 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Mon Jan 21, 5:42 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Martin Langhoff, (Mon Jan 21, 6:45 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Mike Hommey, (Mon Jan 21, 3:44 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 3:05 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Mon Jan 21, 4:56 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 5:07 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Mon Jan 21, 6:41 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 6:53 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Mon Jan 21, 7:21 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Theodore Tso, (Mon Jan 21, 3:57 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 4:01 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Theodore Tso, (Mon Jan 21, 4:15 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 4:31 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Theodore Tso, (Mon Jan 21, 4:46 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 4:59 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Mon Jan 21, 3:41 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 3:58 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Mon Jan 21, 4:33 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 4:53 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, David Kastrup, (Mon Jan 21, 4:58 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Mon Jan 21, 5:33 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 5:49 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Mon Jan 21, 6:34 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 6:46 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Mon Jan 21, 7:44 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 8:47 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Mon Jan 21, 9:01 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Mon Jan 21, 9:13 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 10:33 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Mon Jan 21, 10:50 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 11:04 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Martin Langhoff, (Mon Jan 21, 11:21 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Tue Jan 22, 12:22 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Mon Jan 21, 11:17 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Theodore Tso, (Mon Jan 21, 7:00 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 7:09 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Martin Langhoff, (Mon Jan 21, 6:56 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Martin Langhoff, (Mon Jan 21, 5:17 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 5:28 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Martin Langhoff, (Mon Jan 21, 5:43 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Nicolas Pitre, (Mon Jan 21, 1:08 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, David Kastrup, (Mon Jan 21, 4:32 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Mon Jan 21, 1:25 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, David Kastrup, (Mon Jan 21, 4:35 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Jeff King, (Mon Jan 21, 12:53 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Junio C Hamano, (Fri Jan 18, 4:28 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Eric W. Biederman, (Tue Jan 22, 10:46 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Junio C Hamano, (Tue Jan 22, 10:57 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Nicolas Pitre, (Wed Jan 23, 10:26 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Junio C Hamano, (Wed Jan 23, 5:19 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Fri Jan 18, 4:50 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Fri Jan 18, 4:24 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Sat Jan 19, 4:48 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Sat Jan 19, 2:58 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Wincent Colaiuta, (Sat Jan 19, 8:11 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Sat Jan 19, 9:04 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Wincent Colaiuta, (Sun Jan 20, 5:34 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Mike Hommey, (Sun Jan 20, 1:27 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Sun Jan 20, 1:45 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Mike Hommey, (Sun Jan 20, 3:00 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Sun Jan 20, 4:00 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Sun Jan 20, 4:12 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Sun Jan 20, 3:26 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Sat Jan 19, 6:58 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Sun Jan 20, 2:14 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Sun Jan 20, 9:15 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Sun Jan 20, 2:53 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Mark Junker, (Sat Jan 19, 4:39 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Sat Jan 19, 10:55 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Sat Jan 19, 5:17 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Fri Jan 18, 6:50 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Peter Karlsson, (Fri Jan 18, 11:30 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Thu Jan 17, 8:18 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Thu Jan 17, 8:35 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Robin Rosenberg, (Thu Jan 17, 9:05 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Thu Jan 17, 9:24 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Robin Rosenberg, (Fri Jan 18, 5:42 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Fri Jan 18, 6:30 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Peter Karlsson, (Fri Jan 18, 11:37 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Fri Jan 18, 4:49 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Theodore Tso, (Thu Jan 17, 3:01 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Mark Junker, (Thu Jan 17, 2:50 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Pedro Melo, (Thu Jan 17, 2:12 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Thu Jan 17, 2:18 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Mark Junker, (Thu Jan 17, 2:36 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Pedro Melo, (Thu Jan 17, 2:38 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Thu Jan 17, 2:44 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Pedro Melo, (Thu Jan 17, 3:02 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Dmitry Potapov, (Thu Jan 17, 5:27 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Thu Jan 17, 12:30 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Martin Langhoff, (Thu Jan 17, 12:51 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Thu Jan 17, 1:23 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Geert Bosch, (Thu Jan 17, 2:13 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Mitch Tishmack, (Thu Jan 17, 3:11 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Wincent Colaiuta, (Thu Jan 17, 6:22 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Thu Jan 17, 9:44 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Thu Jan 17, 11:57 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Thu Jan 17, 12:53 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Robin Rosenberg, (Thu Jan 17, 8:44 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Andrew Heybey, (Thu Jan 17, 10:02 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Thu Jan 17, 11:04 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Kyle Moffett, (Sat Jan 19, 3:29 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Kevin Ballard, (Sat Jan 19, 3:57 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Wed Jan 16, 8:25 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Wed Jan 16, 8:33 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Wed Jan 16, 9:06 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Pedro Melo, (Wed Jan 16, 8:43 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Wed Jan 16, 8:57 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, David Kastrup, (Wed Jan 16, 7:58 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Wed Jan 16, 8:19 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Eyvind Bernhardsen, (Wed Jan 16, 6:37 pm)
Re: git on MacOSX and files with decomposed utf-8 file names, Jay Soffian, (Thu Jan 17, 12:43 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Linus Torvalds, (Thu Jan 17, 1:11 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Jay Soffian, (Thu Jan 17, 12:59 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Junio C Hamano, (Thu Jan 17, 1:15 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Wincent Colaiuta, (Thu Jan 17, 6:28 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Thu Jan 17, 7:10 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Pedro Melo, (Thu Jan 17, 7:23 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Thu Jan 17, 9:05 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Wincent Colaiuta, (Thu Jan 17, 7:51 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Johannes Schindelin, (Thu Jan 17, 8:53 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Wincent Colaiuta, (Thu Jan 17, 9:40 am)
Re: git on MacOSX and files with decomposed utf-8 file names, Wincent Colaiuta, (Thu Jan 17, 7:46 am)