On Sat, 4 Aug 2018 at 09:18, Chris Jerdonek <chris.jerdo...@gmail.com> wrote: > > On Sat, Aug 4, 2018 at 1:08 AM, Paul Moore <p.f.mo...@gmail.com> wrote: > > On Sat, 4 Aug 2018 at 08:35, Jeroen Demeyer <j.deme...@ugent.be> wrote: > > > >> So both are different issues, and I agree with both: during the source > >> extraction and build process, you want to preserve timestamps as much as > >> possible. But for the installation, you do NOT want to preserve timestamps. > > > > If this is about the distutils install command, it's worth noting that > > pip is moving to a situation where we'll never use the > > distutils/setuptools "install" command, bur rather we'll build wheels > > and install from wheel. The new PEP 517 installation code will use > > that route exclusively (there's not even a provision in PEP 517 for > > direct installs from source). So the behaviour of the "setup.py > > install" command won't affect pip installs at all in the longer term. > > (How long, I don't know - it depends on how soon we feel we can switch > > fully to PEP 517, and it's a bit premature to decide on that, as the > > PEP 517 code isn't even released yet!) > > How is the new pip code path slated to behave with respect to Jeroen's > question / preference? Is it already specified or does it fall out of > the behavior of existing components, or is it still TBD?
For files extracted from wheels, this is the subject of https://github.com/pypa/pip/issues/5648, as noted earlier in the thread by Jeroen (and the commenters on that issue seem to favour preserving timestamps - Jeroen seemed to say he agreed with this, but I'm not sure I see how that matches his stated requirement for installs to not preserve timestamps...). Whether timestamps are preserved by the wheel building process depends on the build system - so the question boils down to "does setup.py bdist_wheel preserve timestamps?" in the case of the setuptools backend - which is really a question for the wheel project. In the more general case, you'd have to ask the same question of flit, and any other backends you cared about. So: * wheel -> installed: Currently under discussion, with (as far as I can see) conflicting preferences. From the comments in issue 5648 it seems like pip currently alters timestamps, but the commenters there think it would be a "rather uncontroversial patch" (https://github.com/pypa/pip/issues/5648#issuecomment-408439568) to change that * source -> wheel: the backend's responsibility Personally, I have no opinion on the matter. Paul -- Distutils-SIG mailing list -- distutils-sig@python.org To unsubscribe send an email to distutils-sig-le...@python.org https://mail.python.org/mm3/mailman3/lists/distutils-sig.python.org/ Message archived at https://mail.python.org/mm3/archives/list/distutils-sig@python.org/message/KY66KDCRR72PRK6RFMAK5O6EGVPX4BK4/
