build: Rewrite gettext domain when exporting zips

Now that every extension picks up its gettext domain from
its metadata, we can easily change it when exporting the
zips.

That ensures that every extension only binds its own domain
instead of messing up other extension's translations.

https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/issues/335

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/merge_requests/179>

export-zips.sh

@@ -20,6 +20,10 @@ for f in $extensiondir/*; do
   uuid=$name@gnome-shell-extensions.gcampax.github.com
   schema=$schemadir/org.gnome.shell.extensions.$name.gschema.xml
 
+  olddomain=gnome-shell-extensions
+  newdomain=gnome-shell-extension-$name
+  sed -i "/gettext-domain/ s:$olddomain:$newdomain:" $f/metadata.json
+
   xgettext --from-code=UTF-8 --output-dir=$builddir --output=$name.pot $f/*.js
 
   if [ -f $builddir/$name.pot ]; then