home-manager/modules/misc/xdg-mime.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.xdg.mime;
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in {
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options = {
xdg.mime.enable = mkOption {
type = types.bool;
default = pkgs.stdenv.hostPlatform.isLinux;
defaultText =
literalExpression "true if host platform is Linux, false otherwise";
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description = ''
Whether to install programs and files to support the
XDG Shared MIME-info specification and XDG MIME Applications
specification at
<link xlink:href="https://specifications.freedesktop.org/shared-mime-info-spec/shared-mime-info-spec-latest.html"/>
and
<link xlink:href="https://specifications.freedesktop.org/mime-apps-spec/mime-apps-spec-latest.html"/>,
respectively.
'';
};
};
config = mkIf config.xdg.mime.enable {
assertions =
[ (hm.assertions.assertPlatform "xdg.mime" pkgs platforms.linux) ];
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home.packages = [
# Explicitly install package to provide basic mime types.
pkgs.shared-mime-info
# Make sure the target directories will be real directories.
(pkgs.runCommandLocal "dummy-xdg-mime-dirs1" { } ''
mkdir -p $out/share/{applications,mime/packages}
'')
(pkgs.runCommandLocal "dummy-xdg-mime-dirs2" { } ''
mkdir -p $out/share/{applications,mime/packages}
'')
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];
home.extraProfileCommands = ''
if [[ -w $out/share/mime && -w $out/share/mime/packages && -d $out/share/mime/packages ]]; then
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XDG_DATA_DIRS=$out/share \
PKGSYSTEM_ENABLE_FSYNC=0 \
${pkgs.buildPackages.shared-mime-info}/bin/update-mime-database \
-V $out/share/mime > /dev/null
fi
if [[ -w $out/share/applications ]]; then
${pkgs.buildPackages.desktop-file-utils}/bin/update-desktop-database \
$out/share/applications
fi
'';
};
}