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Re: handling binary file

From: Ming Zhang <mingz_at_ele.uri.edu>
Date: 2006-07-27 22:57:04 CEST

On Thu, 2006-07-27 at 22:47 +0200, Ryan Schmidt wrote:
> On Jul 27, 2006, at 19:58, Ming Zhang wrote:
>
> > I met a strange problem. I migrate my code tree from sf.net (CVS) to
> > berlios (SVN). Then I found I have almost all binary files are broken.
> > And seems svn can not even detect this. I feel SVN treat all these
> > binary files as textual files.
>
> Are you sure the files aren't already broken in CVS? I haven't used
> CVS, but I understand it's easy to corrupt binary files in CVS by
> forgetting to tell CVS that they're binary.

i just check out from cvs and these files are ok.

>
> Subversion treats all files as binary and won't muck with them unless
> you tell it to. For example, if you tell it to do line-ending
> conversion (svn:eol-style property) or keyword expansion
> (svn:keywords property) it will do this, even on binary files; this
> will probably destroy most kinds of binary files, so you should not
> ask Subversion to do these kinds of operations on binary files.

i never did this. in fact, i just know this today by googling because of
this problem. :P

>
> There's also the matter of the MIME type (svn:mime-type property).
> Have you set the MIME type of these files to a text/* MIME type or a
> binary MIME type? A good MIME type for PDF files for example would be
> application/pdf.
>
>
> > For example, I have this pdf file Iometer.pdf.
> >
> > $ ll
> > total 1052
> > drwxrwxr-x 4 mingz mingz 4096 May 3 11:02 Docbook
> > drwxrwxr-x 3 mingz mingz 4096 May 3 11:02 Iometer_Files
> > -rw-rw-r-- 1 mingz mingz 988246 May 3 11:02 Iometer.pdf
> > -rw-rw-r-- 1 mingz mingz 68529 May 3 11:02 Iometer.sxw
> >
> > Then I copy the correct file to overwrite it.
> >
> > $ cp ../../../branches/IOMETER-restruct/iometer/Docs/Iometer.pdf .
> >
> > See the file size changed.
> >
> > $ ll
> > total 1056
> > drwxrwxr-x 4 mingz mingz 4096 May 3 11:02 Docbook
> > drwxrwxr-x 3 mingz mingz 4096 May 3 11:02 Iometer_Files
> > -rw-rw-r-- 1 mingz mingz 992633 Jul 27 13:53 Iometer.pdf
> > -rw-rw-r-- 1 mingz mingz 68529 May 3 11:02 Iometer.sxw
> >
> > But svn can not detect the file is changed.
> >
> > $ svn st
> >
> > How to correct this and let svn treat them as binary?
>
> That seems also to point towards improper svn:eol-style or
> svn:keywords properties being used. What do you see if you say "svn
> proplist -v Iometer.pdf"?
>

$ svn proplist -v Iometer.pdf
Properties on 'Iometer.pdf':
  svn:keywords : Author Date Id Revision
  svn:eol-style : native

i have this. i guess native is a default good choice?

Ming

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Received on Thu Jul 27 23:01:14 2006

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