45 lines
1.5 KiB
Nix
45 lines
1.5 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.xserver.gdk-pixbuf;
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# Get packages to generate the cache for. We always include gdk-pixbuf.
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effectivePackages = unique ([pkgs.gdk-pixbuf] ++ cfg.modulePackages);
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# Generate the cache file by running gdk-pixbuf-query-loaders for each
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# package and concatenating the results.
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loadersCache = pkgs.runCommand "gdk-pixbuf-loaders.cache" { preferLocalBuild = true; } ''
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(
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for package in ${concatStringsSep " " effectivePackages}; do
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module_dir="$package/${pkgs.gdk-pixbuf.moduleDir}"
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if [[ ! -d $module_dir ]]; then
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echo "Warning (services.xserver.gdk-pixbuf): missing module directory $module_dir" 1>&2
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continue
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fi
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GDK_PIXBUF_MODULEDIR="$module_dir" \
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${pkgs.stdenv.hostPlatform.emulator pkgs.buildPackages} ${pkgs.gdk-pixbuf.dev}/bin/gdk-pixbuf-query-loaders
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done
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) > "$out"
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'';
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in
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{
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options = {
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services.xserver.gdk-pixbuf.modulePackages = mkOption {
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type = types.listOf types.package;
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default = [ ];
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description = "Packages providing GDK-Pixbuf modules, for cache generation.";
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};
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};
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# If there is any package configured in modulePackages, we generate the
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# loaders.cache based on that and set the environment variable
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# GDK_PIXBUF_MODULE_FILE to point to it.
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config = mkIf (cfg.modulePackages != [] || pkgs.stdenv.hostPlatform != pkgs.stdenv.buildPlatform) {
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environment.variables = {
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GDK_PIXBUF_MODULE_FILE = "${loadersCache}";
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};
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};
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}
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