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Re: Why does Subversion not detect image tag changes?

From: Andy Levy <andy.levy_at_gmail.com>
Date: 2007-08-05 13:58:08 CEST

On 8/5/07, stgn@gmx.net <stgn@gmx.net> wrote:
> Hello
> Why does Subversion not detect image tag changes?
> Take a JPG image, use a image viewer such as XnView or Picasa and add a IPTC image tag (or caption as it is called in Picasa) to the JPG image. Now, try to commit with TortoiseSVN. Subversion doesn't show any changes and therefore there is nothing to commit. Even though I just changed a image file by adding a tag into its header.
> As far as I have seen, the file's time and date do not get changed.
> Used software
> - TortoiseSVN 1.4.4
> - XnView 1.91.1
> (- Picasa 2.7)
> Does anyone know why TortoiseSVN doesn't enlist the file for commit?
> How does Subversion detect file changes? But file date and size?

The first indicator is the file's last-modified time. Because your
application changes the file, but doesn't change the date/time,
Subversion doesn't recognize the change.

Otherwise, Subversion would have to "deep-scan" all files (look at all
contents) to detect any changes to your working copy, as opposed to
looking for changed timestamps and only scanning those files which
have changed.

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Received on Sun Aug 5 13:56:22 2007

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