Slimmed down variant from the reverted #8375.
The rationale behind the name change is to give Godot's project file a unique
extension (".godot") that can be registered on the OS to be associated with
the Godot binary (OS registration not implemented here).
This PR also adds the possibility to start the game or editor if launched
with the project.godot passed as argument, which paves the way for allowing
a similar behaviour on a double-click in the OS file manager (code originally
by @Hinsbart).
Closes#6915.
"ALL IS GOOD" was a lie.
In particular, removes verbose "path not recognized" false positive.
The actual logic is to (somewhat naively) check all ResourceFormatLoaders
and to pick the first good match, so no need to warn about the formats
that do not match the type hint.
Notable changes:
- Now ScriptLanguages have the option to override the global external editor setting.
If `ScriptLanguage::open_in_external_editor()` returns `ERR_UNAVAILABLE` (which it does by default), then the global external editor option will be used.
- Added formatting to the external editor execution arguments. Now it's possible to write something like this: `{project} -g {file}:{line}:{col}`.
- `VisualScript::get_member_line()` now can return the line of functions (well, it returns the id of the _Function_ node of the function). I guess there is nothing else we can get a "line" from.
Fixes:
- Fixes a bug where `ScriptEditor::script_goto_method()` would not work if the script is not already open in the built-in editor.
- Fixes wrong DEFVAL for `cursor_set_column` and `cursor_set_line` in TextEdit.
- `Script::get_member_line()` now returns -1 ("found nothing") by default.
Now project files don't have to be named "godot.cfg" anymore, they can have any name so as long as it ends with *.godot.
Also godot will automatically start the editor now if launched with a project file as an argument.
This allows for double-clicking of projects to open them :)
Code-wise this should be complete, but there's still work to do:
- Make a nice icon for godot projects.
- Work on installers/packaging -> register the extension and icon with godot.
- Update the 2.1 to 3.0 exporter.
Tested on linux and windows so far.
