On Monday, March 11, 2013 1:30:07 AM UTC+1, Vadim Zeitlin wrote:

>  Hello,
>
>  I'm in the process of converting an existing svn repository to git. The
> first step was a standard "git svn clone" that went successfully (after
> taking 15 hours to complete). However I don't want to stop there and would
> like massage the repository a little before making it publicly available.
>
>  The first thing I'd like to do is to replace all references to subversion
> revision numbers in the commit messages with the corresponding git commit
> SHA1s. I've written a small message filter script called "svnmsg2git" that
> searches for all occurrences of r12345, runs "git svn find-rev r12345" and
> then -- and this is the important part -- looks up the new commit id
> corresponding to this under .git-rewrite/map. This seemed to work well in
> limited testing I did initially but after running
>
> git filter-branch --msg-filter svnmsg2git --tag-name-filter cat -- --all
>
> on all ~50k revisions, I have a couple of dozens of errors which happen
> because the file .git-rewrite/map/$commit doesn't exist yet when I'm trying
> to look it up.
>
>  Does anybody know of a way to fix this? This happens apparently because
> filter-branch doesn't process the commits in their svn order, and when one
> of them is on a branch while the other one is on the trunk, it can happen
> that the commit references a previous svn revision is processed before the
> commit corresponding to this revision itself. At least this is the only
> explanation I see. But even if my hypothesis is correct, I still have no
> idea about how to force filter-branch to do things in the "right" order.
>
>  Thanks in advance for any ideas!
> VZ
>

For a topic this advanced, I think you should rather ask for help at the 
Git developer list: https://gist.github.com/tfnico/4441562 

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