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From Marco de Abreu <marco.g.ab...@gmail.com>
Subject Re: Stop redistributing source code of 3rdparty dependencies to avoid licensing issues
Date Fri, 17 Jan 2020 21:04:53 GMT
I agree with Tianqi. We may change our build system, but this won't free us
from the necessity to validate the licenses of our dependencies.

The question at this point is whether we are allowed to differentiate
between our main-source and hold it to the strict standards while treating
the third party folder as dependency, where we only have to verify that the
projects are licensed with an Apache compatible license.

At the moment, the project already treats them different: our license
checks exclude third party. I think this is where the disparity is coming
from. I'd recommend we discuss with Apache how we can handle this
situation: package third party code for user convenience while limiting
responsibility.

In the end, we still have to ensure that everything is licensed properly,
so maybe we should try to align both processes to match the real world
instead of changing the real world to match the process.

-Marco

Tianqi Chen <tqchen@cs.washington.edu> schrieb am Fr., 17. Jan. 2020, 20:44:

> I don't have an opinion, but would like to list pros and cons of doing so.
>
> The pro of doing so is that it indeed simplifies the release process, as
> these additional dependencies becomes category-B level dependencies as in
> https://www.apache.org/legal/resolved.html
>
> The con of doing so is that it brings additional burden to the users of the
> software to check the license of these dependencies, in some sense,
> including these information in the
> license actually gives an extra level of transparency.
>
> The copyright message in some of the dependencies are a bit unfortunate,
> one potential way to run the check is to write a python script to go
> through the files and detect the line Copyright and cross match and add
> them.
>
> Note that good models to follow are
> - hadoop: https://github.com/apache/hadoop/tree/trunk/licenses
> - flink: https://github.com/apache/flink
>
> Each of the repo have a licenses folder that contains licenses, and things
> points to them.
>
> I am not a lawyer, but the case for ps-lite seems can be resolved as long
> as we can confirm these files follows Apache-2.0, as
> https://www.apache.org/licenses/LICENSE-2.0 only requires us to
> redistribute
> the license and anything in the NOTICE, but we do not have the obligation
> to list all the copyright messages in the source content.
>
> TQ
>
> On Fri, Jan 17, 2020 at 11:10 AM Yuan Tang <terrytangyuan@gmail.com>
> wrote:
>
> > +1
> >
> > On Fri, Jan 17, 2020 at 1:59 PM Chris Olivier <cjolivier01@gmail.com>
> > wrote:
> >
> > > +1
> > >
> > > On Fri, Jan 17, 2020 at 10:19 AM Lausen, Leonard
> > <lausen@amazon.com.invalid
> > > >
> > > wrote:
> > >
> > > > Dear MXNet community,
> > > >
> > > > as per recent mail on general@incubator.apache.org [1] there are a
> > > number
> > > > of
> > > > licensing issues in MXNet 1.6rc1. Based on anecdotal evidence I
> believe
> > > > there
> > > > has been no release so far without any licensing issues, which is a
> > > > blocker to
> > > > MXNet graduating from it's incubating status. One contributing factor
> > is
> > > > that we
> > > > bundle 3rdparty source code in our releases [2].
> > > >
> > > > One key factor is that 3rdparty projects don't always enforce
> licensing
> > > > best
> > > > practice in the way we do. For example, 3rdparty/ps-lite doesn't
> > enforce
> > > > license
> > > > headers in the source files and there has been confusion about the
> > > license
> > > > of
> > > > recent contributions by ByteDance (See [1]).
> > > >
> > > > To avoid such licensing issues in MXNet releases a simple solution is
> > to
> > > > stop
> > > > distributing the 3rdparty code in our source releases. Instead, we
> can
> > > > adapt our
> > > > buildsystem to download 3rdparty code as part of the build
> > configuration
> > > > process. CMake makes this very easy with the FetchContent module [3].
> > > >
> > > > For development purpose involving changes to the 3rdparty source or
> > build
> > > > systems that can't access the internet, there are easy means for
> > > > specifying the
> > > > location of local sources (instead of downloading), via the
> > > > FETCHCONTENT_SOURCE_DIR_<someName> variable [4].
> > > >
> > > > Would there be any concerns about such approach? Obviously it can
> only
> > be
> > > > fully
> > > > implemented as soon as the CMake build system is feature complete and
> > the
> > > > Makefile build can be dropped. (Note that the Makefile build is being
> > > > deprecated
> > > > and removed as part of MXNet 2 roadmap [5])
> > > >
> > > > Best regards
> > > > Leonard
> > > >
> > > > [1]:
> > > >
> > > >
> > >
> >
> https://lists.apache.org/thread.html/rb83ff64bdac464df2f0cf2fe8fb4c6b9d3b8fa62b645763dc606045f%40%3Cgeneral.incubator.apache.org%3E
> > > > [2]: See the .tar.gz files at
> > > > https://incubator.apache.org/clutch/mxnet.html
> > > > [3]: https://cmake.org/cmake/help/latest/module/FetchContent.html
> > > > [4]: https://cmake.org/pipermail/cmake/2019-June/069709.html
> > > > [5]: https://github.com/apache/incubator-mxnet/issues/16167
> > > >
> > >
> >
>

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