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Allison Karlitskaya authored
When debugging a program or testing a change to an installed version, it is often useful to be able to replace resources in the program or a library, without recompiling. To support this, for debugging and hacking purposes, it's now possible to define a G_RESOURCE_OVERLAYS environment variable as a colon-separated list of substitutions to perform when looking up GResources. A substitution has the form "/org/gtk/libgtk=/home/desrt/gtk-overlay" The part before the '=' is the resource subpath for which the overlay applies. The part after is a filesystem path which contains files and subdirectories as you would like to be loaded as resources with the equivalent names. In the example above, if an application tried to load a resource with the resource path '/org/gtk/libgtk/ui/gtkdialog.ui' then GResource would check the filesystem path '/home/desrt/gtk-overlay/ui/gtkdialog.ui'. If a file was found there, it would be used instead. Substitutions must start with a slash, and must not have a trailing slash before the '='. It is possible to overlay the location of a single resource with an individual file. https://bugzilla.gnome.org/show_bug.cgi?id=765668
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