Re: [PATCH v2 0/6] git-submodule.sh: convert part of cmd_update to C

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Hi Stefan,

On Tue, 17 Jul 2018, Stefan Beller wrote:

> > A tangent.
> >
> > Because this "-- " is a conventional signature separator, MUAs like
> > Emacs message-mode seems to omit everything below it from the quote
> > while responding, making it cumbersome to comment on the tbdiff.
> >
> > Something to think about if somebody is contemplating on adding more
> > to format-patch's cover letter.
> 
> +cc Eric who needs to think about this tangent, then.
> https://public-inbox.org/git/20180530080325.37520-1-sunshine@xxxxxxxxxxxxxx/

I think this is just a natural fall-out from the users' choice of mail
program. Personally, I have no difficulty commenting on anything below the
`--` separator.

FWIW GitGitGadget follows the example of the `base-commit` footer and
places this information *above* the `--` separator.

> > >> 1:  d4e1ec45740 ! 1:  bbc8697a8ca git-submodule.sh: align error reporting for update mode to use path
> > >>     @@ -6,7 +6,6 @@
> > >>          on its path, so let's do that for invalid update modes, too.
> > >>
> > >>          Signed-off-by: Stefan Beller <sbeller@xxxxxxxxxx>
> > >>     -    Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
> > >>
> > >>      diff --git a/git-submodule.sh b/git-submodule.sh
> > >>      --- a/git-submodule.sh
> >
> > This is quite unfortunate.  I wonder if it is easy to tell
> > range-diff that certain differences in the log message are to be
> > ignored so that we can show that the first patch is unchanged in a
> > case like this.  This series has 4 really changed ones with 2
> > otherwise unchanged ones shown all as changed, which is not too bad,
> > but for a series like sb/diff-colro-move-more reroll that has 9
> > patches, out of only two have real updated patches, showing
> > otherwise unchanged 7 as changed like this hunk does would make the
> > cover letter useless.  It is a shame that adding range-diff to the
> > cover does have so much potential.
> 
> Actually I thought it was really cool, i.e. when using your queued branch
> instead of my last sent branch, I can see any edits *you* did
> (including fixing up typos or applying at slightly different bases).

This is probably a good indicator that the practice on insisting on signing
off on every patch, rather than just the merge commit, is something to
re-think.

Those are real changes relative to the original commit, after all, and if
they are not desired, they should not be made.

> The sign offs are a bit unfortunate as they are repetitive.
> I have two conflicting points of view on that:
> 
> (A) This sign off is inherent to the workflow. So we could
> change the workflow, i.e. you pull series instead of applying them.
> I think this "more in git, less in email" workflow would find supporters,
> such as DScho (cc'd).
> 
> The downside is that (1) you'd have to change your
> workflow, i.e. instead of applying the patches at the base you think is
> best for maintenance you'd have to tell the author "please rebase to $X";
> but that also has upsides, such as "If you want to have your series integrated
> please merge with $Y and $Z" (looking at the object store stuff).
> 
> The other (2) downside is that everyone else (authors, reviewers) have
> to adapt as well. For authors this might be easy to adapt (push instead
> of sending email sounds like a win). For reviewers we'd need to have
> an easy way to review things "stored in git" and not exposed via email,
> which is not obvious how to do.
> 
> (B) The other point of view that I can offer is that we teach range-diff
> to ignore certain patterns. Maybe in combination with interpret-trailers
> this can be an easy configurable thing, or even a default to ignore
> all sign offs?

I thought about that myself.

The reason: I was surprised, a couple of times, when I realized long after
the fact, that some of my patches were changed without my knowledge nor
blessing before being merged into `master`.

To allow me to protest in a timely manner, I wanted to teach GitGitGadget
(which is the main reason I work on range-diff, as you undoubtedly suspect
by now) to warn me about such instances.

The range-diff patch series has simmered too long at this stage, though,
and I did not try to address such a "ignore <regex>" feature
*specifically* so that the range-diff command could be available sooner
than later. I already missed one major version, please refrain from
forcing me to miss another one.

Ciao,
Dscho



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