Re: SVN -> Git *but* with special changes

[Stephen Bash <bash@genarts.com>]

----- Original Message -----
> From: "Abscissa" <bus_nabble_git@semitwist.com>
> To: git@vger.kernel.org
> Sent: Wednesday, September 28, 2011 12:37:29 PM
> Subject: SVN -> Git *but* with special changes
>
> I have a couple big projects in SVN that I'd like to convert to Git.
> Being in SVN, they've operated under a couple assumptions that are 
> not true under Git. These assumptions are:
> 
> 1. Directories can exist even if there's nothing in them (just like
> any filesystem).

What requires the empty directories to exist?  The build system?  Can you just let them go away in Git and fix it downstream in the user's working copy?
 
> 2. Keeping binary files in version control isn't a big deal because
> the whole repo doesn't get copied to everyone's system or use up 
> people's GitHub storage space.

I'd eliminate these on the SVN side before converting to Git.  If you have svnadmin access to the SVN repo svnadmin dump, svndumpfilter, svnadmin load is a pretty easy process.

> The SVN repos have been relying on those, but both are false under
> Git, so I need to do a "modified" conversion, rather than just a 
> straight one.
> 
> So, how can I convert an SVN repo to Git, and have the conversion add
> dummy files to empty directories and exclude specific files? (Also, 
> there are tags and branches to be converted too, in the SVN-standard 
> "tags" and "branches" directories.)

To do the actual conversion, svn-fe and git fast-import are by far the quickest way to get the data into Git.  Filtering into tags and branches is a bit of a trick though [1].  git-svn has (IMO) a good branching UI, but can be very slow for large repositories.

[1] http://thread.gmane.org/gmane.comp.version-control.git/158940/focus=159151 : note this thread is almost a year out of date now, and even I know much better ways to go about this now -- but the scripts are not written.

HTH,
Stephen