The "qml" tool was the only way of loading QML files that would respect
a shebang line. This is problematic as this way you cannot load such
files programatically using QQmlComponent, limiting their re-use. Common
tools like Qt Creator, but also qmllint, qmlformat, qmlcachegen, etc
would not recognize files with shebangs.
By moving she-bang support directly in the lexer all tools implicitly
support it.
Note that we could just as easily support '#' as extra comment
character along with //, but here we narrowly add support for in
the first line only, as node does (this means that javascript files
using she-bang accepted by node, are now accepted also by qml).
The only tool needing some adjustments is qmlformat, that has to emit
the she-bang again as she-bang and as first line.
Add tests for qmlformat, and sprinkle some she-bangs in the other
tests just to be sure it doesn't affect anything.
Change-Id: I1f6d881c7438bdb23163b5dbe829d59a35d11132
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
6d51f997df