This issue came up in the thread about speeding up start up of desktop app snaps, but seems to have gotten lost in the noise. I would like the ability to have a part modify the contents of the stage/ directory after all parts have staged their content.
A concrete use case for this is compiling GSettings schemas. Schemas are XML files that are generally installed to
$datadir/glib-2.0/schemas, and the compilation process produces a
gschemas.compiled file that covers all the schemas in that directory.
If we have multiple parts that install schemas to the same directory, we’d need to generate a
gschemas.compiled file that covers all of them. This means no part can produce the file without knowing what all the other parts are going to stage.
From a brief look it isn’t currently possible to do this, even with a custom part plugin. So would it be possible to enable a feature like this?