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chromium: build chromiumOzone #85197

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offlinehacker commented Apr 14, 2020

Motivation for this change

I need chromium build for wayland and do not want to rebuild every time myself, as it takes a long time to build. Here is people having their own forks, and having their own CI for that, so i see others have similar needs: https://github.com/colemickens/nixpkgs-chromium. This makes me think having hydra build chromium with ozone support is beneficial for others.

Currently to have it start you need to have gallium iris driver: https://nixos.wiki/wiki/Intel_Graphics and start with chromium --ozone-platform=wayland

Things done
  • Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
  • Built on platform(s)
    • NixOS
    • macOS
    • other Linux distributions
  • Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
  • Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
  • Tested execution of all binary files (usually in ./result/bin/)
  • Determined the impact on package closure size (by running nix path-info -S before and after)
  • Ensured that relevant documentation is up to date
  • Fits CONTRIBUTING.md.
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primeos commented Apr 14, 2020

Related discussion: #82443

This will unfortunately have to wait for a bit until we've resolved #85253 but we can discuss it in the meantime.

I also thought about this and I'd prefer to call it chromium-experimental. Why?:

  • It's not officially supported (both upstream and by us as we only have capacity to test one build and maintaining Chromium is already demanding enough - i.e. while we'll try to avoid it the build might be broken at times). This is also the main reason for the name.
  • We can use chromium-experimental to test other features as well (e.g. before using them in chromium).
  • Ozone might become the default in 2020 (which would make the attribute obsolete).
@primeos primeos self-assigned this Apr 14, 2020
@offlinehacker
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offlinehacker commented May 9, 2020

Do I change this to chromium-unstable and enable ozone and hardware video decode?

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primeos commented May 13, 2020

@offlinehacker I'm not sure what you mean. I was suggesting chromium-experimental as that seems to fit best IMO while e.g. chromium-unstable sounds more like e.g. a more recent / development version (but this is up for discussion).

Regarding hardware accelerated video decode with Ozone: That seems to be tricky (and it's probably best to ignore this for now). I got past the libva initialisation errors but VA-API still wasn't selected for decoding (I didn't have a closer look, but there seem to be code paths for this). My latest attempt is here: https://github.com/primeos/nixpkgs/commits/chromium-experimental

And lastly some core members should probably decide if it's ok to build a second Chromium derivation on Hydra.

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offlinehacker commented May 20, 2020

I see, so I will close this pull request for now. chromium-experimental built by hydra would be really useful.

@primeos primeos mentioned this pull request Jun 6, 2020
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