gresource-add-overrides.sh

#!/bin/bash

theme_path="./theme/"
overrides_path="./overrides/"
gresource_path="/usr/share/gnome-shell/gnome-shell-theme.gresource"
xml_name="gnome-shell-theme.gresource.xml"
gresource_name="gnome-shell-theme.gresource"

extract_gresource () {
	for r in `gresource list $1`; do
		r=${r#\/org\/gnome\/shell/}
		if [ ! -d ${r%/*} ]; then
	  	mkdir -p ${r%/*}
		fi
	done

	for r in `gresource list $1`; do
        	gresource extract $1 $r >${r#\/org\/gnome\/shell/}
	done
}

create_xml () {
	xml='<?xml version="1.0" encoding="UTF-8"?>
	<gresources>
	<gresource prefix="/org/gnome/shell/theme">'
	for path in `find $1 -type f | sed -e 's@^'$1'@@g'`; do
		xml="$xml
	<file>$path</file>"
	done
	xml="$xml
	</gresource>
</gresources>"
	echo "$xml" > "$1$2"
}

add_overrides() {
	for f in $1*; do
		cp -f $f "$theme_path"
	done
}

[ -d "$theme_path" ] && rm -r "$theme_path"
extract_gresource "$gresource_path"
add_overrides "$overrides_path" "$theme_path"
create_xml "$theme_path" "$xml_name"
glib-compile-resources --sourcedir="$theme_path" --target "$gresource_name" "$theme_path$xml_name"