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nixgl: add module

This module enables wrapping programs which require access to libGL
with nixGL on non-NixOS systems.
This commit is contained in:
Mel Bourgeois 2024-04-29 19:37:24 -05:00 committed by Robert Helgesson
parent 82378b3f7f
commit 446293584f
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3 changed files with 77 additions and 0 deletions

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@ -1801,6 +1801,18 @@ in {
itself. itself.
''; '';
} }
{
time = "2024-10-25T08:18:30+00:00";
condition = hostPlatform.isLinux;
message = ''
A new module is available: 'nixGL'.
NixGL solve the "OpenGL" problem with nix. The 'nixGL' module provides
integration of NixGL into Home Manager. See the "GPU on non-NixOS
systems" section in the Home Manager mantual for more.
'';
}
]; ];
}; };
} }

64
modules/misc/nixgl.nix Normal file
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@ -0,0 +1,64 @@
{ config, lib, pkgs, ... }:
let cfg = config.nixGL;
in {
meta.maintainers = [ lib.maintainers.smona ];
options.nixGL.prefix = lib.mkOption {
type = lib.types.str;
default = "";
example = lib.literalExpression
''"''${inputs.nixGL.packages.x86_64-linux.nixGLIntel}/bin/nixGLIntel"'';
description = ''
The nixGL command that `lib.nixGL.wrap` should wrap packages with.
This can be used to provide libGL access to applications on non-NixOS systems.
Some packages are wrapped by default (e.g. kitty, firefox), but you can wrap other packages
as well, with `(config.lib.nixGL.wrap <package>)`. If this option is empty (the default),
then `lib.nixGL.wrap` is a no-op.
'';
};
config = {
lib.nixGL.wrap = # Wrap a single package with the configured nixGL wrapper
pkg:
if cfg.prefix == "" then
pkg
else
# Wrap the package's binaries with nixGL, while preserving the rest of
# the outputs and derivation attributes.
(pkg.overrideAttrs (old: {
name = "nixGL-${pkg.name}";
# Make sure this is false for the wrapper derivation, so nix doesn't expect
# a new debug output to be produced. We won't be producing any debug info
# for the original package.
separateDebugInfo = false;
buildCommand = ''
set -eo pipefail
${
# Heavily inspired by https://stackoverflow.com/a/68523368/6259505
pkgs.lib.concatStringsSep "\n" (map (outputName: ''
echo "Copying output ${outputName}"
set -x
cp -rs --no-preserve=mode "${
pkg.${outputName}
}" "''$${outputName}"
set +x
'') (old.outputs or [ "out" ]))}
rm -rf $out/bin/*
shopt -s nullglob # Prevent loop from running if no files
for file in ${pkg.out}/bin/*; do
echo "#!${pkgs.bash}/bin/bash" > "$out/bin/$(basename $file)"
echo "exec -a \"\$0\" ${cfg.prefix} $file \"\$@\"" >> "$out/bin/$(basename $file)"
chmod +x "$out/bin/$(basename $file)"
done
shopt -u nullglob # Revert nullglob back to its normal default state
'';
}));
};
}

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@ -31,6 +31,7 @@ let
./misc/gtk.nix ./misc/gtk.nix
./misc/lib.nix ./misc/lib.nix
./misc/news.nix ./misc/news.nix
./misc/nixgl.nix
./misc/numlock.nix ./misc/numlock.nix
./misc/pam.nix ./misc/pam.nix
./misc/qt.nix ./misc/qt.nix