We seem to just focus on how to avoid the conflict with the name "external"
used in bazel. Since we consider the possibility of renaming, why not
revisit the modules "external" contains?

Looks like kinds of the modules external directory contains are 1) Docker
2) Connectors 3) Sink on Dropwizard metrics (only ganglia here, and it
seems to be just that Ganglia is LGPL)

Would it make sense if each kind deserves a top directory? We can probably
give better generalized names, and as a side-effect we will no longer have
"external".

On Fri, Mar 18, 2022 at 5:45 AM Dongjoon Hyun <dongjoon.h...@gmail.com>
wrote:

> Thank you for posting this, Alkis.
>
> Before the question (1) and (2), I'm curious if the Apache Spark community
> has other downstreams using Bazel.
>
> To All. If there are some Bazel users with Apache Spark code, could you
> share your practice? If you are using renaming, what is your renamed
> directory name?
>
> Dongjoon.
>
>
> On Thu, Mar 17, 2022 at 11:56 AM Alkis Evlogimenos
> <alkis.evlogime...@databricks.com.invalid> wrote:
>
>> AFAIK there is not. `external` has been baked in bazel since the
>> beginning and there is no plan from bazel devs to attempt to fix this
>> <https://github.com/bazelbuild/bazel/issues/4508#issuecomment-724055371>.
>>
>> On Thu, Mar 17, 2022 at 7:52 PM Sean Owen <sro...@gmail.com> wrote:
>>
>>> Just checking - there is no way to tell bazel to look somewhere else for
>>> whatever 'external' means to it?
>>> It's a kinda big ugly change but it's not a functional change. If
>>> anything it might break some downstream builds that rely on the current
>>> structure too. But such is life for developers? I don't have a strong
>>> reason we can't.
>>>
>>> On Thu, Mar 17, 2022 at 1:47 PM Alkis Evlogimenos
>>> <alkis.evlogime...@databricks.com.invalid> wrote:
>>>
>>>> Hi Spark devs.
>>>>
>>>> The Apache Spark repo has a top level external/ directory. This is a
>>>> reserved name for the bazel build system and it causes all sorts of
>>>> problems: some can be worked around and some cannot (for some details on
>>>> one that cannot see
>>>> https://github.com/hedronvision/bazel-compile-commands-extractor/issues/30
>>>> ).
>>>>
>>>> Some forks of Apache Spark use bazel as a build system. It would be
>>>> nice if we can make this change in Apache Spark without resorting to
>>>> complex renames/merges whenever changes are pulled from upstream.
>>>>
>>>> As such I proposed to rename external/ directory to want to rename the
>>>> external/ directory to something else [SPARK-38569
>>>> <https://issues.apache.org/jira/browse/SPARK-38569>]. I also sent a
>>>> tentative [PR-35874 <https://github.com/apache/spark/pull/35874>] that
>>>> renames external/ to vendor/.
>>>>
>>>> My questions to you are:
>>>> 1. Are there any objections to renaming external to X?
>>>> 2. Is vendor a good new name for external?
>>>>
>>>> Cheers,
>>>>
>>>

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