Re: RFC: Proposing git-filter-repo for inclusion in git.git

On Fri, Aug 23, 2019 at 11:06 AM Elijah Newren <newren@gmail.com> wrote: <snip>

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Ooh, and another one I remembered just after hitting 'send':
  * If the user provides a --tag-name-filter that maps multiple tags
to the same name, no warning or error is provided; filter-branch
simply overwrites each tag in some undocumented pre-defined order
(lexicographic) resulting in only one tag at the end.  A regression
test will fail if you attempt to error out and warn the user, so if
you are trying to make a backward compatible reimplementation you have
to add extra code to detect collisions and make sure that only the
lexicographically last one is rewritten.  (fast-import will naturally
error out if told to write the same tag more than once, so you have to
avoid triggering it.)

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