Filename or extension too long (OSError) on Windows

[abhidg]

From @jsteyn - creating a venv and installing inside it fixes the issue

[ethanwhite]

Thanks @abhidg & @jsteyn. We aren't seeing this in our Windows tests (or on our local Windows machine) so we'll need some more detail in order to explore it.

[hturner]

Okay, for example on Windows 10 with Python 3.9.12

Requirement already satisfied: idna<4,>=2.5 in c:\users\heather\anaconda3\lib\site-packages (from requests->offlinedatasci) (3.3)                                                                                                               
Installing collected packages: offlinedatasci                                                                           
ERROR: Could not install packages due to an OSError: [WinError 206] The filename or extension is too long: 'C:\\Users\\Heather\\anaconda3\\Lib\\site-packages\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\offlinedatasci'  

or with a different Python instead of the one from Anaconda

Installing collected packages: offlinedatasci                                                                          
ERROR: Could not install packages due to an OSError: [WinError 206] The filename or extension is too long: 'C:\\Users\\Heather\\AppData\\Local\\Programs\\Python\\Python310\\Lib\\site-packages\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build\\lib\\build' 

The second one is Python 3.10.4.

[ethanwhite]

The large number of nest directories \\lib\\build\\lib\\build\\lib\\build... is really weird. Is this behavior exclusive to offlinedatasci or does it happen with other packages?

[hturner]

It does seem to be specific to offlinedatasci. E.g. pip install rptree and py -m pip install codetiming both work fine, but equivalent commands for offlinedatasci give above error, unless in a virtual environment.

Maybe related to pypa/setuptools#4076?

[ethanwhite]

Thanks @hturner! That's super helpful. Based on that I'm guessing that this was an issue with repeated local builds as part of the testing effort. If that's right the #126 should fix the issue. Can you checkout that PR and see if that fixes things for you.

Since I just had to look this up again yesterday for the 42nd time here's how to checkout the PR:

git fetch upstream pull/126/head:test-branch
git switch test-branch

[abhidg]

@ethanwhite if you have gh installed, you can also do gh pr checkout 126. This only works for GitHub repos though.

[ethanwhite]

@ethanwhite if you have gh installed, you can also do gh pr checkout 126. This only works for GitHub repos though.

Ooh that is nice!

[ethanwhite]

Reopening since we still need someone to confirm that the fixed worked. The fix has now been merged into main so reinstalling from main is all we need for a test.

[hturner]

Reinstalling from main with pip install git+https://git@github.com/carpentriesoffline/offlinedatasci.git works for me.

[ethanwhite]

Awesome! Thanks @hturner! As soon as we get a couple of other things merged I'll role a new release.