[llvm-dev] Proposing a llvm-patch helper script in-tree to create/apply patches without arc

[James Henderson via llvm-dev]

I like the concept, and a quick glance at the script is essentially what
I'd expect, though I haven't looked at it in depth. I'm quite okay with
jumping through the current hoops needed to do those three items, but they
are also my most common operations, so a script would definitely simplify
things for me. Unfortunately, I don't currently have the time to invest in
it myself.

On Tue, 21 Jan 2020 at 02:16, Florian Hahn via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi,
>
> One takeaway for me from the recent Phabricator vs Github PR discussions
> was that arc (arcanist) can be a pain to set up and may pose a hurdle for
> some contributors.
>
> I think those points could be addressed relatively easily by adding a
> llvm-patch script (or an even better name) that allows users to create and
> apply patches from reviews.llvm.org using Phabricators API. In my
> experience, the three most common uses cases are:
>
> 1. Create a new review from the current HEAD commit in the working
> directory and let me optionally add subscribers/reviewers
> 2. Update the diff for an existing review with the current HEAD commit in
> the working directory
> 3. Download the latest diff for a revision and apply it to the working
> directory, using the commit message from Phabricator.
>
> Those should be fairly easy to implement and as a proof-of-concept I went
> ahead and put up a patch implementing 3. from the list above:
> https://reviews.llvm.org/D73075 .
>
>  Please note that the script is probably a bit rough around the edges and
> I probably won’t have time to implement 1. and 2. in the near future on my
> own, but maybe someone would be interested in helping out.
>
> I think that could improve the experience for new contributors
> substantially:
>  * Create a new patch: `llvm-patch upload`
>  * Apply a patch from a review: `llvm-patch apply D12345`.
>
> WDYT?
>
> Cheers,
> Florian
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