Hi,

Yes you are right, SVN 1.6.16 doest it as well, so it's not a 1.7 new issue.

There is just different behaviour for such file in the TortioseSVN Comit Dialog, so I didn't realized it before - 1.6 does not display any property status - you have to take a look on the properties and there is the octet-stream
- 1.7 displays modified property status

Regrads
  Tomas


On Fri, Oct 21, 2011 at 11:15:19AM +0200, Tomáš Bihary wrote:
Hello,

after upgrading the svn 1.7 I realized an issue.

When I add an empty UTF-8 file, it is added with mimetype
application/octet-stream
The empty UTF8 file has 3 bytes size - there are just the 3 mark
bytes 0xEF 0xBB 0xBF
The same happened in svn 1.6 though, didn't it?

We could special-case the UTF-8 BOM in the mime-type detection logic.
See the patch below. Can you try this patch?

Note that the UTF-8 BOM is, as far as I know, only used by Windows.
So this problem should only happen there.

If there is an content in that file, it is handled correctly like text.

I've found a similar issue 2194 with UTF-16 files which status is REOPENED.
UTF-16 files are always marked binary at the moment.
This is because the internal diff and merge functionality does not
understand UTF-16. As a workaround, you can configure an external
diff/merge tool that understands UTF-16 files:
http://svnbook.red-bean.com/nightly/en/svn.advanced.externaldifftools.html


Index: subversion/libsvn_subr/io.c
===================================================================
--- subversion/libsvn_subr/io.c (revision 1186983)
+++ subversion/libsvn_subr/io.c (working copy)
@@ -2968,6 +2968,13 @@ svn_io_detect_mimetype2(const char **mimetype,
    /* Now close the file.  No use keeping it open any more.  */
    SVN_ERR(svn_io_file_close(fh, pool));

+  if (amt_read == 3&&  block[0] == 0xEF&&  block[1] == 0xBB&&  block[2] == 
0xBF)
+    {
+      /* This is an empty UTF-8 file which only contains the UTF-8 BOM.
+       * Treat it as plain text. */
+      return SVN_NO_ERROR;
+    }
+
    if (svn_io_is_binary_data(block, amt_read))
      *mimetype = generic_binary;


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