gnome-tweak-tool: new package

A tool to customize advanced GNOME 3 options

https://wiki.gnome.org/action/show/Apps/GnomeTweakTool

nixos/modules/services/x11/desktop-managers/gnome3.nix

@@ -105,6 +105,7 @@ in {
         gnome3.gnome-user-docs
 
         gnome3.file-roller
+        gnome3.gnome-tweak-tool
       ] config.environment.gnome3.excludePackages);
   };
 

pkgs/desktops/gnome-3/default.nix

@@ -162,4 +162,6 @@ rec {
   libgit2-glib = callPackage ./misc/libgit2-glib { };
   
   gexiv2 = callPackage ./misc/gexiv2 { };
+
+  gnome-tweak-tool = callPackage ./misc/gnome-tweak-tool { };
 }

pkgs/desktops/gnome-3/misc/gnome-tweak-tool/default.nix

@@ -0,0 +1,46 @@
+{ stdenv, intltool, fetchurl, python, pygobject3, atk
+, pkgconfig, gtk3, glib, hicolor_icon_theme, libsoup
+, bash, makeWrapper, itstool, libxml2, python3Packages
+, gnome3, librsvg, gdk_pixbuf, file, libnotify }:
+
+stdenv.mkDerivation rec {
+  name = "gnome-tweak-tool-3.10.1";
+
+  src = fetchurl {
+    url = "mirror://gnome/sources/gnome-tweak-tool/3.10/${name}.tar.xz";
+    sha256 = "fb5af9022c0521a925ef9f295e4080212b1b45427cd5f5f3a901667590afa7ec";
+  };
+
+  doCheck = true;
+
+  propagatedUserEnvPkgs = [ gnome3.gnome_themes_standard ];
+
+  makeFlags = [ "DESTDIR=/" ];
+
+  buildInputs = [ pkgconfig gtk3 glib intltool itstool libxml2
+                  gnome3.gsettings_desktop_schemas makeWrapper file
+                  gdk_pixbuf gnome3.gnome_icon_theme librsvg
+                  hicolor_icon_theme gnome3.gnome_icon_theme_symbolic
+                  python pygobject3 libnotify gnome3.gnome_shell
+                  libsoup gnome3.gnome_settings_daemon gnome3.nautilus
+                  gnome3.gnome_desktop ];
+
+  preFixup = ''
+    wrapProgram "$out/bin/gnome-tweak-tool" \
+      --set GDK_PIXBUF_MODULE_FILE "$GDK_PIXBUF_MODULE_FILE" \
+      --prefix XDG_DATA_DIRS : "${gtk3}/share:${gnome3.gnome_themes_standard}/share:$out/share:$XDG_ICON_DIRS:$GSETTINGS_SCHEMAS_PATH" \
+      --prefix GI_TYPELIB_PATH : "$GI_TYPELIB_PATH" \
+      --prefix LD_LIBRARY_PATH ":" "${libsoup}/lib:${gnome3.gnome_desktop}/lib:${libnotify}/lib:${gtk3}/lib:${atk}/lib" \
+      --prefix PYTHONPATH : "$PYTHONPATH:$(toPythonPath $out)"
+  '';
+
+  patches = [ ./find_gsettings.patch ];
+
+  meta = with stdenv.lib; {
+    homepage = https://wiki.gnome.org/action/show/Apps/GnomeTweakTool;
+    description = "A tool to customize advanced GNOME 3 options";
+    maintainers = with maintainers; [ lethalman ];
+    license = licenses.gpl3;
+    platforms = platforms.linux;
+  };
+}

pkgs/desktops/gnome-3/misc/gnome-tweak-tool/find_gsettings.patch

@@ -0,0 +1,22 @@
+diff --git a/gtweak/gsettings.py b/gtweak/gsettings.py
+index a00fe19..dce74b2 100644
+--- a/gtweak/gsettings.py
++++ b/gtweak/gsettings.py
+@@ -33,10 +33,15 @@ class GSettingsMissingError(Exception):
+ 
+ class _GSettingsSchema:
+     def __init__(self, schema_name, schema_dir=None, schema_filename=None, **options):
+-        if not schema_dir:
+-            schema_dir = gtweak.GSETTINGS_SCHEMA_DIR
+         if not schema_filename:
+             schema_filename = schema_name + ".gschema.xml"
++        if not schema_dir:
++            schema_dir = gtweak.GSETTINGS_SCHEMA_DIR
++            for xdg_dir in GLib.get_system_data_dirs():
++                dir = os.path.join(xdg_dir, "glib-2.0", "schemas")
++                if os.path.exists(os.path.join(dir, schema_filename)):
++                    schema_dir = dir
++                    break
+ 
+         schema_path = os.path.join(schema_dir, schema_filename)
+         if not os.path.exists(schema_path):