There's code in Swarming (I don't remember where) that finds the NVIDIA driver version based only on the files installed, not by creating OpenGL contexts.

Ideally we would figure out a way to do the same for Mesa.

There's no generic way to get the GPU driver version on linux, here's the code specifically for nvidia:
https://cs.chromium.org/chromium/infra/luci/appengine/swarming/swarming_bot/api/platforms/linux.py?l=87

Please add the code path that works for your case.

Thanks maruel@ for the pointer.

Yang, Yunchao: is it possible to detect the installed Mesa version from looking at files on disk? In the Swarming code it's not possible to create an OpenGL context in order to detect the Mesa or driver version.

Thanks.

Removing restricted view as there's nothing private about this.

Yunchao, may I assign this to you to find someone from your team to help with identifying the Mesa version from just the on-disk files? Thanks.

Ken, it is OK. Xinghua will take a look. 

There is a tool named glxinfo provided by package "mesa-utils", but it needs to create context (I think this is the most official way to get version of Mesa). 
Like maruel@ mentioned above, there is no generic way to get GPU info on Linux. Is your system Ubuntu? If so, we may have some alternatives (Other distributions may have similar method):
1) dpkg -s libgl1-mesa-dri |grep Version
I got "Version: 18.0.5-0ubuntu0~18.04.1" on my machine, while "18.0.5" is the Mesa version.
2) cat /var/lib/dpkg/status |grep -A9 "Package: libgl1-mesa-dri"
I got below output on my machine.
Package: libgl1-mesa-dri
Status: install ok installed
Priority: optional
Section: libs
Installed-Size: 134299
Maintainer: Ubuntu X-SWAT <ubuntu-x@lists.ubuntu.com>
Architecture: amd64
Multi-Arch: same
Source: mesa
Version: 18.0.5-0ubuntu0~18.04.1

I'm fine with dpkg route, make sure to also check it is installed.

yang.gu@: per our concall yesterday, would greatly appreciate it if someone from your team could check out this repository:
https://chromium.googlesource.com/infra/luci/luci-py/

Add the code to appengine/swarming/swarming_bot/api/platforms/linux.py to detect the Mesa version when it's available (please make the code gracefully fall back and return None if anything fails, like _get_nvidia_version() does), and hook it up to get_gpu():
https://cs.chromium.org/chromium/infra/luci/appengine/swarming/swarming_bot/api/platforms/linux.py?l=202

Appreciate your help hooking this up - our team doesn't have any local Linux workstations with Intel GPUs, only ones in the data center, so it'll be much simpler for your team to write and test this locally.

Thanks again.

Not sure how to submit the patch to luci-py for review. Let me just upload it here and PTAL. 

Deleted: 0001-Add-Intel-GPU-Mesa-driver-version-on-Ubuntu.patch 1.6 KB

0001-Add-Intel-GPU-Mesa-driver-version-on-Ubuntu.patch 1.6 KB Download

Proposed as https://chromium-review.googlesource.com/1349371 with modifications.

The following revision refers to this bug:
  https://chromium.googlesource.com/infra/luci/luci-py.git/+/d6a0b5a09d7c99ce9bd7e91009147e6cb83e5686

commit d6a0b5a09d7c99ce9bd7e91009147e6cb83e5686
Author: Marc-Antoine Ruel <maruel@chromium.org>
Date: Sat Nov 24 18:47:52 2018

Add Intel GPU Mesa driver version on Ubuntu

As context creation is not allowed, dpkg command is used against key
Intel Mesa driver package to get version information.

Change based on a patch contributed by yang.gu@intel.com

Bug:  900285 
Change-Id: I28a33d4bb0977624b0e5b9646de4c50e29f4fa59
Reviewed-on: https://chromium-review.googlesource.com/c/1349371
Commit-Queue: Marc-Antoine Ruel <maruel@chromium.org>
Reviewed-by: Quinten Yearsley <qyearsley@chromium.org>

[modify] https://crrev.com/d6a0b5a09d7c99ce9bd7e91009147e6cb83e5686/appengine/swarming/swarming_bot/api/platforms/linux.py

This will be live to prod next week.

This is live:
https://chromium-swarm.appspot.com/botlist?c=id&c=task&c=gpu&c=os&c=pool&c=status&d=asc&f=os%3AUbuntu&f=pool%3AChrome-GPU&f=gpu%3A8086%3A5912&k=gpu&s=id%3Aasc

Nice, thank you, yang.gu@ and maruel@!

Thank you Yang and Marc-Antoine for adding this information! It will make it much easier to maintain these bots.