Günther,
Nice thought experiment, but I don't think it is going to work. Subversion is based on the idea of storing and versioning files - you put something in and if you ask for it later you get the file back which is byte for byte the same. Unzipping and storing the bits and re-assembling very likely means you can't get a byte-for-byte comparison match.
Also think about what happens when someone browses the file through http. Instead of seeing the file, they see a directory, which contains the streams inside the zip. Because you can have "directories" inside a zip file, what do you do - create an entire directory tree in svn?
If all you wanted was keyword expansion for Word/Excel/Powerpoint, I think it should be implemented differently (using the OpenXml API), and not in TSVN - either in subversion itself, or in an external program like SubWcRev. But is the feature really that useful for office docs? Other rev. control systems like Git don't even have keyword expansion.
Best,
F
________________________________
From: Gunter Koenigsmann <Gunter.Koenigsmann_at_semikron.com>
To: dev_at_tortoisesvn.tigris.org
Sent: Tuesday, June 11, 2013 3:10:54 AM
Subject: Antw: how to use tsvn with excel & vba
Instead of saving things outside of excel to get them saved in a text
format I always dreamed of a pre-commit-hook that works on the fact that
technically a docx file from word or a xlsx file from excel-file is an
ordinary zip archive. to get things like svn:keywords working it would
suffice to
- unpack the zip-archive before committing
- and zip it again using zero compression ( for the command line zip
utility the command- line flags that do this would read "-Z store" or
shorter "-0".
Additionaly setting the compression to zero would mean huge space
savings on the server:
- Subversion internally uses compression for storing files so the
files won't be saved in an uncompressed state on the server
- and subversion only stores the differences between the old and the
new version. If you change just a single word in an uncompressed file
chances are high that the change affects only a single line that
therefore has to be stored on the server.
If the file is compressed, file chances are high instead that
changing a single word in the uncompressed will affect the whole
structure of the result of the compression so subversion will have to
store big portions of a file regardless how efficient it normally is in
handling binary files.
Gunter.
Gunter Königsmann
R&D
Tel: +49 911-6559-6025
Fax: +49 911-6559-776747
www.semikron.com
gunter.koenigsmann_at_semikron.com
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Received on 2013-06-12 16:06:54 CEST