Re: [PATCH 1/4] subtree: support split --rejoin --squash

Matthew Ogilvie [off-list ref] writes:

Allow using --squash with "git subtree split --rejoin".  It
will still split off (and save to --branch) the complete
subtree history, but the merge done for the "--rejoin" will
be merging a squashed representation of the new subtree
commits, instead of the commits themselves (similar to
how "git subtree merge --squash" works).

Signed-off-by: Matthew Ogilvie <redacted>
---

I can think of a couple of possible objections to this patch.
Are these (or any others) worth fixing?

1. Perhaps someone want the saved subtree (--branch) to have
   a squashed representation as well, as an option?  Maybe we
   need two different --squash options?  Something
   like "--rejoin-squash"?
2. It could definitely use some automated tests.  In fact,
   pre-existing --squash functionality is hardly tested at
   all, either.
      See patch 4 comments for a script I use to help with
   mostly-manual testing.

As I am totally uninterested in "git subtree" (sorry!), I'll queue
these three patches as-is so that others who are interested and
motivated to work on polishing it can take a look at them more
easily.

Thanks.