Jupyter Lab build fails after installing extension: path names too long for Windows about ipympl HOT 6 CLOSED

Ah, I recently added a check (not in that version of JLab) that verifies node 5+ before trying to install an extension, because it installs maximally flat, which allows use to dedupe packages and avoids the long path problem on Windows.

Let's call this one closed, thanks!

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Hi @jmbejara, thanks for the report! Which version of npm are you using? npm.com -v

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Also, this is Windows 10 I assume?

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Thanks. No problem! It's npm version 5.0.3 on Windows 10.

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FWIW I just tried on Windows 10 with [email protected] with the above commands and it worked. I also verified that I don't have LongPathsEnabled set in my registry.

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Hmm. I can't replicate it myself. I reset LongPathsEnabled and rebooted, uninstalled nodejs and jupyterlab et al, and then started from scratch. However, everything seems to be working fine this time. A possible reason is that when I was first trying to get it to work, I realized I had two copies of nodejs installed---one that I installed a year and a half ago (4.4.7 with npm v. 2.15.8) and the other freshly from conda. I removed the old version while I was tinkering and proceeded to try things to get it to work. Maybe that had something to do with it? While I was trying to replicate the error, I tried with this older version of npm and everything still seemed to work fine. So, I don't really know what happened. I don't see the directory @jupyter-widgets being created (or at least persisting) after the build this time.

So, anyway, sorry to bother with this one. I guess it's probably not worth looking into further. Thanks for checking it though!

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