Work around missing libudev.so.0 with post-link symlink to libudev.so.1

ryanvolz commented 4 years ago

Work around missing libudev.so.0 on modern Linux systems. This has been a pain for a while now, and something I've had to instruct multiple users to work around.

This adds a post-link script that checks for missing libudev.so.0 and, if missing, adds a symbolic link to the environment that points to the system's libudev.so.1. There is also a pre-unlink script that removes that symbolic link if required. And if any of that fails, it should just carry on anyway.

This is pretty hacky, but it works for me locally with my Ubuntu system. Hopefully I made it general enough to work with other distributions as well? If/when the libudev CDT gets updated (for, say, CentOS 7) this probably won't be necessary anymore, but I think it could be pretty helpful until then.

Checklist

[x] Used a fork of the feedstock to propose changes
[x] Bumped the build number (if the version is unchanged)
[x] Reset the build number to 0 (if the version changed)
[x] Re-rendered with the latest conda-smithy (Use the phrase code>@<space/conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
[x] Ensured the license file is being packaged.

Fixes #1

conda-forge-linter commented 4 years ago

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe:

Jinja2 variable references are suggested to take a {{<one space><variable name><one space>}} form. See lines [9].
License is not an SPDX identifier (or a custom LicenseRef) nor an SPDX license expression.

conda-forge-linter commented 4 years ago

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

hoechenberger commented 4 years ago

@ryanvolz Thanks for the contribution! Looks okay to me :)

hoechenberger commented 4 years ago

Would you like to add yourself as a maintainer too?

ryanvolz commented 4 years ago

I already am 😉, I just thought this one could use some looking over.

hoechenberger commented 4 years ago

Oh. Haha sorry :) Too much stuff going on around me :D Yeah I suggest we merge this and if users report any problems, we reconvene? ;)

ryanvolz commented 4 years ago

Sounds good!

conda-forge / libusb-feedstock

Work around missing libudev.so.0 with post-link symlink to libudev.so.1 #4