Install packages with pip as if you were in the past!

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Miscellaneous pypi-timemachine
Overview

A PyPI time machine

Do you wish you could just install packages with pip as if you were at some fixed date in the past? If so, the PyPI time machine is for you!

Disclaimer: this is alpha-quality software - for now it is a quick hack, but I'd love to make this more robust/usable with your help!

Installing

To install:

pip install pypi-timemachine

Using

Once installed, you can run a PyPI server with:

pypi-timemachine 2014-02-03

or if you need to specify a precise time (in UTC):

pypi-timemachine 2014-02-03T12:33:02

This will start up a Flask app, and will print out a line such as:

Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)

You can then call pip with:

pip install --index-url http://127.0.0.1:5000/ astropy

and this will then install the requested packages and all dependencies, ignoring any releases after the cutoff date specified above.

Caveats/warnings

If a package is already installed, pip will not try installing it again. This means that if e.g. you try and run pip as described above, but the package you are trying to install (or any of its dependencies) is already installed, no matter how recent the version, it will not be installed again. Therefore, I recommend using pip with the custom index URL inside a clean environment (but you can run the pypi-timemachine command inside your regular environment.)

Comments
  • Make date to be part of the index url

    Make date to be part of the index url

    I am here in a follow up to https://github.com/ReproNim/repropip/issues/1 and I think pypi-timemachine is exactly what I need besides one "wishlist" aspect: be able to specify date not while starting up the pypi-timemachine but rather in the index-url, e.g.

     pip install --index-url http://127.0.0.1:5000/2014-02-03T12:33:02/ astropy

    thus making it possible to reuse the same server for various dates, similarly to how https://snapshot.debian.org/ works. Do you think it is possible to implement or would be prohibitively expensive. (I haven't checked yet how pypi-timemachine functions, decided to just ask first... socializing you know ;-) )

    opened by yarikoptic 1
  • Add a command to start other processes such as `pip` with index server configured

    Add a command to start other processes such as `pip` with index server configured

    First of all, thanks for the awesome tool!

    I'm using this in tox, testing my addon against several versions of an app that is available in pypi but doesn't pin its dependencies. Therefore I opted for using pypi-timemachine and not tox-timemachine. The tool works, but I have to jump through a few hoops to get its port and then to kill it when done.

    It would be nice if the tool allowed launching stuff directly, like for instance xvfb-run vs Xvfb. I imagine something like this:

    pypi_timemachine --cutoff-date=2022-05-05 run pip install foo bar

    This can be achieved simply by setting PIP_INDEX_SERVER and waiting for the child process to finish.

    opened by oakkitten 0
  • Can not find version that exists at specific date

    Can not find version that exists at specific date

    I want to install the scikit-learn 0.21.2 but don't want to install its latest dependences I notice that scikit-learn 0.21.2 release on May 24, 2019

    With the following command I start the timemachine pypi-timemachine 2019-05-26

    However, when I type in the command pip install --no-cache-dir --index-url http://127.0.0.1:46403/ scikit-learn==0.21.2

    It failed and the error message is above image Am I made some mistakes or it's a bug?

    opened by Reset816 2
  • Tests

    Tests

    In order to validate my rpm package, some sort of tests are needed. https://build.opensuse.org/package/show/home:jayvdb:py-new/python-pypi-timemachine

    opened by jayvdb 0
  • Mention pip's

    Mention pip's "--ignore-installed" option?

    pip's "--ignore-installed" option should let you forcibly downgrade an existing environment (although making a new env is still going to be more reliable)

    opened by ncoghlan 1
Owner
Thomas Robitaille
Thomas Robitaille
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