Re: Three issues from a Subversion-to-git migration

[Thomas Rast <trast@student.ethz.ch>]

Eric Raymond wrote:
> > I've used the following hack to make real tags out of SVN "tags":
> > 
> > git for-each-ref --format="%(refname)" refs/remotes/tags/ |
> > while read tag; do
> >     GIT_COMMITTER_DATE="$(git log -1 --pretty=format:"%ad" "$tag")" \
> >     GIT_COMMITTER_EMAIL="$(git log -1 --pretty=format:"%ce" "$tag")" \
> >     GIT_COMMITTER_NAME="$(git log -1 --pretty=format:"%cn" "$tag")" \
> >     git tag -m "$(git log -1 --pretty=format:"%s%n%b" "$tag")" \
> >     "${tag#refs/remotes/tags/}" "$tag"
> > done
> > 
> > Disclaimer: it worked last time I used it.  Haven't checked if it got
> > dusty since.
> 
> Wow, that's ugly. But it does look like it ought to work.

BTW, you'll also want to use some treatment that removes the empty
commit that is generated from the 'svn copy' SVN commit for tagging.
One option is to use 'git filter-branch --prune-empty ...', which will
also drop other no-op commits.  If you want to remove only the ones
that come from tagging, creative use of git-diff-tree in the above
loop will work.

I suppose I was never bothered by the lack of automatic tagging
because I rarely found a git-svn import to be immediately fit for
publishing.  Usually it took some grafting and other filtering to
bring the history into shape anyway.  Maybe now that the svn:mergeinfo
support obviates the need for grafting, it's worth thinking about the
rest.

-- 
Thomas Rast
trast@{inf,student}.ethz.ch