Personally I would prefer if we rewrote the commits locally to be
formatted prior to submitting it into Phabricator. That way everything
stays in sync. Also usually clang-formatting a patch is the last thing
I want to do before submission anyway. And doing it now is kind of
annoying if you have a multi-patch stack because by default it only
operates on uncommitted changes so formatting a patch that's not the
topmost means doing some patch juggling/rebasing.

On Thu, Dec 13, 2018 at 5:54 PM Ehsan Akhgari <ehsan.akhg...@gmail.com> wrote:
>
> Previously I had shied away from ideas similar to (a) or (b) since I wasn't 
> sure if that would be what developers would expect and accept, given that it 
> would cause the change the reviewer sees to no longer match their local 
> change, which could cause hicups e.g. when trying to find the code that a 
> reviewer has commented on locally, or when rebasing on top of a newer version 
> of mozilla-central after Lando has landed your patch (which may cause 
> conflicts with your local patch due to formatting differences).
>
> Do we think these types of issues aren't something we should be concerned 
> about?
>
> Thanks,
> Ehsan
>
> On Fri, Dec 7, 2018 at 3:09 PM Andrew Halberstadt <a...@mozilla.com> wrote:
>>
>> I think we should implement a) and do the formatting prior to submission. 
>> This prevents us from wasting reviewer time on format issues, and also makes 
>> sure that "what you see in phab, is what gets landed".
>>
>> On Fri, Dec 7, 2018, 2:04 PM Gregory Szorc, <g...@mozilla.com> wrote:
>>>
>>> On Fri, Dec 7, 2018 at 1:57 PM Botond Ballo <bba...@mozilla.com> wrote:
>>>
>>> > On Fri, Dec 7, 2018 at 11:36 AM Sylvestre Ledru <sle...@mozilla.com>
>>> > wrote:
>>> > > In the meantime, we will be running a bot weekly to reformat the
>>> > > mistakes and add the changeset into the ignore lists.
>>> > > But in the long run this won’t be sustainable, so once we gain
>>> > > confidence that a good number of developers have successfully integrated
>>> > > clang-format into their local workflow, we will look into enabling a
>>> > > Mercurial hook on hg.mozilla.org to reject misformatted code upon push
>>> > > time.  That will be the ultimate solution to help ensure that our code
>>> > > will be properly formatted at all times.
>>> >
>>> > Have you considered something like running clang-format automatically
>>> > during landing (i.e. as part of what Lando does to the patch)? That
>>> > seems like it would achieve the best of both worlds, by not placing
>>> > any requirements on what developers do locally, while also ensuring
>>> > the tree is always properly formatted without cleanup commits.
>>> >
>>>
>>> I chatted with Sylvestre earlier today. While I don't want to speak for
>>> him, I believe we both generally agree that the formatting should happen
>>> "automagically" as part of the patch review and landing lifecycle, even if
>>> the client doesn't have their machine configured for formatting on save.
>>> This would mean that patches are either:
>>>
>>> a) auto-formatted on clients as part of being submitted to Phabricator
>>> b) updated automatically by bots after submission to Phabricator
>>> c) auto-formatted by Lando as part of landing
>>>
>>> Lando rewrites/rebases commits as part of landing, so commit hashes already
>>> change. So if auto-formatting magically occurs and "just works" as part of
>>> the review/landing process, there should be little to no developer
>>> inconvenience compared to what happens today. i.e. developers don't need to
>>> do anything special to have their patches land with proper formatting.
>>> _______________________________________________
>>> dev-platform mailing list
>>> dev-platform@lists.mozilla.org
>>> https://lists.mozilla.org/listinfo/dev-platform
>
>
>
> --
> Ehsan
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