Graft can't collapse and rebase --collapse does not record all metadata

[Lawrence Stewart]

Hi all,

I want to be able to cherry pick a related set of commits from our dev
branch up to our prod branch, but collapse them into a single commit on
the prod branch.

Graft allows me to apply them as individual commits which does the job
but is overly verbose and not a great solution, especially when many
commits are involved.

Rebase --collapse --keep -r <rev1> -r <rev2> -r <rev3> conceptually and
practically does what I want, but does not record all of the revs in the
extra meta data, only rebase_source=<rev3>. As such merge and rebase
logic is unaware that <rev1> and <rev2> have been pulled up.

hg export | hg import can be used to apply multiple patches to the
working copy and commit as a single commit, but obviously is gross and
doesn't record any meta data at all which is bad.

I think what I would conceptually like is graft to grow a --collapse
flag which would apply all revs on the graft command line to the working
copy and then commit as one, also recording all revs in the metadata for
the commit.

Is there already a canonical way to do what I'm talking about that I've
missed, or would it be worthwhile opening a feature request against
graft for a --collapse option?

Cheers,
Lawrence