mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-26 23:54:01 +00:00
88 lines
3.3 KiB
Nix
88 lines
3.3 KiB
Nix
{ config, lib, pkgs, ... }:
|
|
|
|
with lib;
|
|
{
|
|
options = {
|
|
gtk.iconCache.enable = mkOption {
|
|
type = types.bool;
|
|
default = config.services.xserver.enable;
|
|
defaultText = literalExpression "config.services.xserver.enable";
|
|
description = ''
|
|
Whether to build icon theme caches for GTK applications.
|
|
'';
|
|
};
|
|
};
|
|
|
|
config = mkIf config.gtk.iconCache.enable {
|
|
|
|
# (Re)build icon theme caches
|
|
# ---------------------------
|
|
# Each icon theme has its own cache. The difficult is that many
|
|
# packages may contribute with icons to the same theme by installing
|
|
# some icons.
|
|
#
|
|
# For instance, on my current NixOS system, the following packages
|
|
# (among many others) have icons installed into the hicolor icon
|
|
# theme: hicolor-icon-theme, psensor, wpa_gui, caja, etc.
|
|
#
|
|
# As another example, the mate icon theme has icons installed by the
|
|
# packages mate-icon-theme, mate-settings-daemon, and libmateweather.
|
|
#
|
|
# The HighContrast icon theme also has icons from different packages,
|
|
# like gnome-theme-extras and meld.
|
|
|
|
# When the cache is built all of its icons has to be known. How to
|
|
# implement this?
|
|
#
|
|
# I think that most themes have all icons installed by only one
|
|
# package. On my system there are 71 themes installed. Only 3 of them
|
|
# have icons installed from more than one package.
|
|
#
|
|
# If the main package of the theme provides a cache, presumably most
|
|
# of its icons will be available to applications without running this
|
|
# module. But additional icons offered by other packages will not be
|
|
# available. Therefore I think that it is good that the main theme
|
|
# package installs a cache (although it does not completely fixes the
|
|
# situation for packages installed with nix-env).
|
|
#
|
|
# The module solution presented here keeps the cache when there is
|
|
# only one package contributing with icons to the theme. Otherwise it
|
|
# rebuilds the cache taking into account the icons provided all
|
|
# packages.
|
|
|
|
environment.extraSetup = ''
|
|
# For each icon theme directory ...
|
|
|
|
find $out/share/icons -mindepth 1 -maxdepth 1 -print0 | while read -d $'\0' themedir
|
|
do
|
|
|
|
# In order to build the cache, the theme dir should be
|
|
# writable. When the theme dir is a symbolic link to somewhere
|
|
# in the nix store it is not writable and it means that only
|
|
# one package is contributing to the theme. If it already has
|
|
# a cache, no rebuild is needed. Otherwise a cache has to be
|
|
# built, and to be able to do that we first remove the
|
|
# symbolic link and make a directory, and then make symbolic
|
|
# links from the original directory into the new one.
|
|
|
|
if [ ! -w "$themedir" -a -L "$themedir" -a ! -r "$themedir"/icon-theme.cache ]; then
|
|
name=$(basename "$themedir")
|
|
path=$(readlink -f "$themedir")
|
|
rm "$themedir"
|
|
mkdir -p "$themedir"
|
|
ln -s "$path"/* "$themedir"/
|
|
fi
|
|
|
|
# (Re)build the cache if the theme dir is writable, replacing any
|
|
# existing cache for the theme
|
|
|
|
if [ -w "$themedir" ]; then
|
|
rm -f "$themedir"/icon-theme.cache
|
|
${pkgs.buildPackages.gtk3.out}/bin/gtk-update-icon-cache --ignore-theme-index "$themedir"
|
|
fi
|
|
done
|
|
'';
|
|
};
|
|
|
|
}
|