The Extensions app code is now independent enough from the rest of the code
base to move it to its own subprojects, like we did for the extensions-tool.
This allows for stand-alone builds of the app, which we are about to use
for distributing it as flatpak.
https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1133
The browser plugin is crashy and broken; there are dozens of bugs filed
against it on Bugzilla and nobody is looking at them. Chrome and Firefox
have both dropped support for NPAPI plugins. Epiphany still has support,
but it's hidden behind a gsetting and all the UI to enable it has been
removed, so very few users would be able to figure out how to enable.
I've even previously considered blacklisting this plugin in the past due
to all the crashes.
Since this plugin has not actually worked in any browsers for a long
time now, time to delete it.
https://bugzilla.gnome.org/show_bug.cgi?id=766776
Auto-detect options add some convenience for platforms where a
particular feature isn't available - systemd on non-Linux OS comes
to mind - but the downside is that it is easy to accidentally build
without a desired feature. We consider the latter much more serious
nowadays, so turn our auto-detect options into regular boolean
options.
https://bugzilla.gnome.org/show_bug.cgi?id=791007
Meson options are typed, so the prefix isn't necessary, and indeed
looks odd when used to disable the option:
-Denable_foo=false
Also replace underscores with dashes, which is the preferred meson
style.
https://bugzilla.gnome.org/show_bug.cgi?id=791007
Meson is on track to replace autotools as the build system of choice,
so support it in addition to autotools. If all goes well, we'll
eventually be able to drop the latter ...
https://bugzilla.gnome.org/show_bug.cgi?id=783229
