acmeattic-devel team mailing list archive

[Aditya Manthramurthy <aditya.mmy@xxxxxxxxx>]

On Wednesday 07 July 2010 09:51 AM, Karthik Swaminathan Nagaraj wrote:
> I think we misunderstood each other here. After a file is modified, we 
> need an unmodified version to perform the diff against the current 
> version. I mentioned that SVN keeps a copy of the unmodified version 
> as .svn/text-base/filename.svn-base. So the diff becomes
> *diff .svn/text-base/filename.svn-base filename*
>
> Svn stores this unmodified version in the same folder as the original. 
> However, it is unclear to me when svn makes this copy. It does not 
> copy all the files (mod and unmod) as that's a waste of space. So, how 
> is svn notified of a file write? Is it filesystem hooks which as 
> called when a file is edited?

It is not true that it does not copy all files. It *does* keep a copy of 
all files in the folder that contains that file. In fact if a file 
/a/b/c is in being versioned under svn, then its copy can be found in 
/a/b/.svn/c.svn-base. So no fs hooks involved.

--
Aditya.