Re: Any technical reason why hgsubversion can't act as a svn bridge?

On Dec 2, 2010, at 4:32 AM, Piet Skiet wrote:

> Hi,
> 
> I'd like to follow this workflow at work: http://community.thoughtworks.com/posts/6e49c1e7b8
> i.e. have a hg "gateway" into the svn server. According to the article
> this is possible with git-svn. Are there any technical reasons why
> hgsubversion can't be made to act this way. I know fom experience that
> this doesn't work (merges prior to rebasing screws everything up for
> the leaf committers).

You'd have to write patches to hgsubversion that'd handle the bookkeeping, and know that you'd have to back
up some sort of revision equivalence database, as without that you'd be unable to continue staying in
sync. The basic workflow would be a push without a rebase. In the event that a new revision comes back when
you look for the revision you just pushed, those new revision(s) would be committed on top of their correct
parent revs and then a dummy merge would be created whose tree state was exactly the data pulled from
subversion for the pushed rev. That's probably confusing. If it is, ask and I'll try to diagram it out. Note
that this is all theoretical, and I don't personally have time to implement the feature.

There's also the difficulty of usernames - you'll lose your authorship information when revisions go back
into svn.

> Currently I have a workaround where I have both a subversion and hg
> working copy in the same directory at the "gateway", and I manually
> merge between svn and hg.
> 
> Best regards
> 
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