Re: [PATCH] [git-am] Handle git show output correctly

2012-09-12 Thread Matthieu Moy
Peter Jones pjo...@redhat.com writes:

 Subject: [PATCH] [git-am] Handle git show output correctly

The convention in Git is subsystem: summary of change (i.e. no
brackets around git-am, just am: and no capital for Handle).

My other concerns (name of stgit, multi-lines subject lines and lack of
documentation) still hold.

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Matthieu Moy
http://www-verimag.imag.fr/~moy/
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Re: [PATCH] [git-am] Handle git show output correctly

2012-09-12 Thread Junio C Hamano
Matthieu Moy matthieu@grenoble-inp.fr writes:

 Peter Jones pjo...@redhat.com writes:

 Subject: [PATCH] [git-am] Handle git show output correctly

 The convention in Git is subsystem: summary of change (i.e. no
 brackets around git-am, just am: and no capital for Handle).

 My other concerns (name of stgit, multi-lines subject lines and lack of
 documentation) still hold.

We do not want to apply git show output that munges the log
message, period.

If you want to give patches to somebody (or to yourself) via e-mail
or via sneaker-net, git format-patch is there for you.  Do not
butcher am to accept a format that is not meant for patch
transport in the first place.

If you want to screw something in to your shelf, you would use a
screw and a screwdriver.  You do not try to hammer a nail using your
screwdriver, find that the screwdriver is not very useful as a
hammer and modify the screwdriver to hit your nail.

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Re: [PATCH] [git-am] Handle git show output correctly

2012-09-12 Thread Peter Jones
On Wed, 2012-09-12 at 10:32 -0700, Junio C Hamano wrote:
 We do not want to apply git show output that munges the log
 message, period.
 
 If you want to give patches to somebody (or to yourself) via e-mail
 or via sneaker-net, git format-patch is there for you.  Do not
 butcher am to accept a format that is not meant for patch
 transport in the first place.
 
 If you want to screw something in to your shelf, you would use a
 screw and a screwdriver.  You do not try to hammer a nail using your
 screwdriver, find that the screwdriver is not very useful as a
 hammer and modify the screwdriver to hit your nail.

That seems to be completely missing the point - people /send/ them
without knowing, and as a maintainer of several projects, it's /hostile/
to people who are trying to help by sending patches to go around in
circles with them about the fact that they typed the wrong command. I'd
rather just take the patch, but right now the tools won't let me, and
for completely arbitrary reasons.

Let me put it a different way - if you won't accept git-am handling git
show output because git show has output that wasn't designed to be
parsed ever, would you be opposed to a patch that switches the git
show output to be something usable?

-- 
  Peter

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Re: [PATCH] [git-am] Handle git show output correctly

2012-09-12 Thread Junio C Hamano
Peter Jones pjo...@redhat.com writes:

 Let me put it a different way - if you won't accept git-am handling git
 show output because git show has output that wasn't designed to be
 parsed ever, would you be opposed to a patch that switches the git
 show output to be something usable?

The output from the command is optimized for humans, but you could
invoke git show --pretty=email if you want to, so I do not think
you need any patch to do that.

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Re: [PATCH] git-am: Handle git show output correctly

2012-09-12 Thread Andreas Ericsson
On 09/13/2012 12:19 AM, Junio C Hamano wrote:
 Dan Johnson computerdr...@gmail.com writes:
 
 Not really.  If we start encouraging people to use git show output
 as a kosher input to am, we would have to support such use
 forever, and we end up painting ourselves in a corner we cannot get
 out of easily.

 If git am emitted a warning when accepting git show output, it seems
 like it would support Peter's use-case without encouraging bad
 behavior?
 
 Are you seriously suggesting me to sell to our users a new feature
 saying this does not work reliably, we would not recommend using
 it, no, really, don't trust it. from the day the feature is
 introduced, especially when we know it will not be the feature does
 not work well yet, but it will, we promise but is and it may become
 worse in the future?
 
 I do not see much point in doing that.
 
 Besides, what bad behaviour do we avoid from encouraging with such
 an approach?  As Peter said, the problem is not on the part of the
 user who ended up with an output from git show, when he really
 wants output from git format-patch.  Giving the warning to the
 user of git am is too late.
 

It might be enough to either enable format-patch output or print a
warning to stderr when stdout is not a tty. I believe that would at
least mitigate the problem, and it might educate the user as well.
We already modify output format when stdout is not a tty (removing
colors), so we're not giving guarantees about its format when it's
piped somewhere. I believe that would provide almost every scenario
with the expected outcome (including 'git show | grep'), but there
will be a handful of very surprised people as well.

-- 
Andreas Ericsson   andreas.erics...@op5.se
OP5 AB www.op5.se
Tel: +46 8-230225  Fax: +46 8-230231

Considering the successes of the wars on alcohol, poverty, drugs and
terror, I think we should give some serious thought to declaring war
on peace.
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Re: [PATCH] git-am: Handle git show output correctly

2012-09-12 Thread Junio C Hamano
Dan Johnson computerdr...@gmail.com writes:

 I was assuming Peter would accept the patch, and reply with a in the
 future, please submit the output of format-patch, thus correcting the
 submitter's behavior. This warning would serve someone who did not
 know that they wanted the output of format-patch, and hopefully teach
 them to send such a reply message.

Next time, please do this rarely has worked in practice.  This is
because the moment you accepted the current patch, you have already
lost the carrot ;-)

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