[core-workflow] Updated draft of PEP 512

[Maciej Szulik]

On Wed, Jan 20, 2016 at 1:51 AM, Brett Cannon <brett at python.org> wrote:

> Bot to handle pull request merging
> ''''''''''''''''''''''''''''''''''
> As stated in the section entitled
> "`Document steps to commit a pull request`_", the desire is to
> maintain a linear history for cpython. Unfortunately,
> Github's [#github]_ web-based workflow does not support a linear
> history. Because of this, a bot should be written to substitute for
> GitHub's in-browser commit abilities.
>
> To start, the bot should accept commands to commit a pull request
> against a list of branches. This allows for committing a pull request
> that fixes a bug in multiple versions of Python.
>
> More advanced features such as a commit queue can come later. This
> would linearly apply accepted pull requests and verify that the
> commits did not interfere with each other by running the test suite
> and backing out commits if the test run failed. To help facilitate
> the speed of testing, all patches committed since the last test run
> can be applied and run in a single test run as the optimistic
> assumption is that the patches will work in tandem.
>
> Inspiration or basis of the bot could be taken from pre-existig bots
> such as Homu [#homu]_ or Zuul [#zuul]_.
>
>
>
>From the experience on both OpenShift [1] and Kubernetes [2] I know there's
a need to
rerun tests quite frequently (flakes, errors, etc). One option is to close
and re-open the issue to
trigger the integrated CI services to re-run, which is cumbersome imho.
Both of the aforementioned
projects have testing bots. The one in orgin [1] is more sophisticated in
that it allows core-devs
running finer grained tests before actually merging the PR. The merge bot
runs quite bit
of the tests, but not all, possible examples include benchmarks.
Just a food for thought ;)

Maciej


[1] https://github.com/openshift/origin/
[2] https://github.com/kubernetes/kubernetes
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