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xdg-mime-apps: add defaultApplicationPackages option

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This option allows a user to inject default applications directly from
a list of specified packages. It was previously possible to do this,
but only through import from derivation.
This commit is contained in:
Robert Helgesson 2025-09-18 12:56:55 +02:00
parent e387519338
commit efcba687d3
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4 changed files with 102 additions and 38 deletions
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65
modules/misc/xdg-mime-apps.nix
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@ -75,6 +75,24 @@ in
the list is attempted, and so on.
'';
};
defaultApplicationPackages = mkOption {
type = types.listOf types.package;
default = [ ];
example = [
pkgs.eog
pkgs.evince
];
description = ''
Packages whose `.desktop` files will be used to establish default
mimetype associations.
These associations are appended to the associations in
[](#opt-xdg.mimeApps.defaultApplications). If multiple packages
associate with the same mime type, then the priority among them is
determined by their order in the list.
'';
};
};
config = lib.mkMerge [
@ -106,8 +124,12 @@ in
done
done > "$out"
'';
processAll = p: processLines (builtins.readFile (associations p));
warning = "The Home Manager `lib.xdg.mimeAssociations` function is deprecated, you can now instead use the option `xdg.mimeApps.defaultApplicationPackages` to achieve the same without import from derivation";
in
p: processLines (builtins.readFile (associations p));
lib.warn warning processAll;
}
(lib.mkIf cfg.enable {
@ -118,15 +140,44 @@ in
# Deprecated but still used by some applications.
xdg.dataFile."applications/mimeapps.list".source = config.xdg.configFile."mimeapps.list".source;
xdg.configFile."mimeapps.list".text =
xdg.configFile."mimeapps.list".source =
let
joinValues = lib.mapAttrs (n: lib.concatStringsSep ";");
baseFile = (pkgs.formats.ini { }).generate "mimeapps.list" {
"Added Associations" = joinValues cfg.associations.added;
"Removed Associations" = joinValues cfg.associations.removed;
"Default Applications" = joinValues cfg.defaultApplications;
};
# With default application packages merged into the generated base file.
mergedFile = pkgs.runCommand "mimeapps.list" { ps = cfg.defaultApplicationPackages; } ''
export PATH=$PATH:${pkgs.crudini}/bin
function mergeEntry() {
local mime="$1"
local name="$2"
local existing
existing="$(crudini --get $out 'Default Applications' "$mime" 2>/dev/null || true)"
local value="$existing''${existing:+;}''$name"
crudini --inplace --set $out 'Default Applications' "$mime" "$value"
}
install -m644 ${baseFile} $out
for p in $ps ; do
for path in "$p"/share/applications/*.desktop ; do
name="''${path##*/}"
mimes=$(crudini --get "$path" 'Desktop Entry' MimeType 2>/dev/null || true)
for mime in ''${mimes//;/ }; do
mergeEntry "$mime" "$name"
done
done
done
'';
in
lib.generators.toINI { } {
"Added Associations" = joinValues cfg.associations.added;
"Removed Associations" = joinValues cfg.associations.removed;
"Default Applications" = joinValues cfg.defaultApplications;
};
if cfg.defaultApplicationPackages == [ ] then baseFile else mergedFile;
})
];
}