[webkit-dev] (no subject)

Dirk Pranke dpranke at chromium.org
Tue Feb 28 13:06:25 PST 2012

On Tue, Feb 28, 2012 at 10:58 AM, Ojan Vafai <ojan at chromium.org> wrote:
> On Mon, Feb 27, 2012 at 5:56 PM, Dirk Pranke <dpranke at chromium.org> wrote:
>> Hi all,
>> If you don't use webkit-patch and Git, you can stop reading now. Otherwise
>> ...
>> Currently, webkit-patch -g has some special logic for figuring out
>> what to diff against for Git checkouts.
>> Specifically, webkit-patch "-g commitish" gets translated to the git
>> equivalent of 'git diff commitish^..commitish'. Then, we have an
>> additional tweak that rewrites '-g HEAD' to '-g HEAD..' in order to
>> pick up any uncommitted changes, and if nothing is specified, we will
>> attempt to diff against the remote master/trunk version.
>> This is very useful if you typically want to just upload a single
>> commit issue, but is a bit un-git-like, and actually thwarts some
>> other use cases.
>> My questions are:
>> 1) Do you use "-g foo" to upload a single change? If so, would you be
>> annoyed if I changed that syntax to a different argument, or
>> eliminated it completely (so that you would have to type foo^..foo)?
>> 2) Do you object to changing the default to match what 'git diff'
>> does? This would change the defaults so that:
>>  a) instead of no arguments meaning "diff against remote master", it
>> would mean "diff against what is staged for commit"
> I'd rather this not change. It used to work like this and there was much
> happiness when it changed to the current scheme. I think a lot of people's
> workflows depend on the no argument case uploading all the changes in their
> branch.
>>  b) 'git diff commitish" would show the diff between commitish and
>> your current working directory
> Now that I think about it, I realize that this doesn't really work without
> also changing (a). Also, there seem to be at least a few people who expect
> -g to work like cherry-pick.
> I'm beginning to think it probably makes sense to add a different
> commandline argument that works exactly like diff (e.g. takes an optional
> second value). --git-diff perhaps?

Based on the responses on this thread, I agree with you. It looks like
a fair number of people either want "cherry-pick" or "diff against
remote master". I will probably implement a separate switch for "pure

-- Dirk

>> If there is a consensus that we shouldn't change the defaults, I will
>> likely implement a different command line argument that does mirror
>> what git does.
>> As an aside, I will probably be adding a patch that will figure out
>> what the 'tracking' branch (as defined by branch.<branchname>.merge)
>> is for your current checkout, and give webkit-patch a way to use that
>> instead of the remote head (this would make using stacked local
>> branches much easier). I haven't decided if this should be the default
>> or if you should have to request this via something like 'webkit-patch
>> diff -g UPSTREAM' instead; if you have an opinion, feel free to
>> comment.
>> There is a bug tracking this work at
>> https://bugs.webkit.org/show_bug.cgi?id=76958 if you want to comment
>> there instead of here or follow along with whatever ends up happening.
>> Thanks,
>> -- Dirk
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