Godot: Cannot build GodotSharp project

[xDGameStudios]

Godot version:

The current build is #538c8eec1

OS/device including version:
Mac OSX Mojave

Issue description:
When I try to build I get a "Failed to generate GodotSharp solution. Error 30":

I also have the following output error message:

[akien-mga]

That's likely caused by #29941.
There was a mismatch for the parent type of EditorImportPlugin which was fixed in https://github.com/godotengine/godot/pull/29941/files#diff-f8fca47e37ec343018622e4738ed772aR37

I'm not sure why it would cause an error though, especially since ResourceImporter is in core and is properly registered in ClassDB. CC @neikeq.

@xDGameStudios Did you rebuild your Mono glue?

[xDGameStudios]

@akien-mga I used the following commands to compile... from the compile with Mono from the manual: https://docs.godotengine.org/en/3.1/development/compiling/compiling_with_mono.html

scons platform=osx tools=yes module_mono_enabled=yes mono_glue=no
bin/godot.osx.tools.64.mono --generate-mono-glue modules/mono/glue
scons p=osx target=release_debug tools=yes module_mono_enabled=yes

also this is the output from the --generate-mono-glue

Mono: Logfile is: /Users/franciscodias/Library/Application Support/Godot/mono/mono_logs/2019_06_27 17.45.58 (42269).txt
WARNING: init: This binary is built with `mono_glue=no` and cannot be used for scripting
   At: modules/mono/csharp_script.cpp:113.
Ignoring type `BulletPhysicsDirectBodyState` because it's not exposed
Ignoring type `BulletPhysicsServer` because it's not exposed
Ignoring type `GDScriptNativeClass` because it's not exposed
Ignoring type `IP_Unix` because it's not exposed
Ignoring type `InputDefault` because it's not exposed
Ignoring type `Physics2DDirectBodyStateSW` because it's not exposed
Ignoring type `Physics2DServerSW` because it's not exposed
Name of method `Popup` is ambiguous with the name of its enclosing class `Popup`. Renaming method to `Popup_`
Name of method `Reference` is ambiguous with the name of its enclosing class `Reference`. Renaming method to `Reference_`
Ignoring type `ResourceImporter` because it's not exposed
Ignoring type `RootMotionView` because it's not enabled
Name of property `TextureProgress` is ambiguous with the name of its enclosing class `TextureProgress`. Renaming property to `TextureProgress_`
Generating ARVRAnchor...
Generating ARVRCamera...
Generating ARVRController...
Generating ARVRInterface...
...

then the list goes on!! Just posted the beginning because it looks strange!

[neikeq]

@akien-mga Are you sure ResourceImporter is exposed? I can't find where the register_virtual_class<ResourceImporter>() call is, but my fork is a few days behind.

[xDGameStudios]

@akien-mga and @neikeq looking at the output from the glue generation:

Ignoring type `ResourceImporter` because it's not exposed

It doesn't seem to be exposed

[mysticfall]

I encountered the same problem after updating my build from 05a0a68c7 to 6e0323657.

[piratesephiroth]

yep, this makes the mono version unusable

[aaronfranke]

Just tried to compile Godot and run my project, spent awhile regression testing to find that it was indeed caused by #29941 (eaaff9da3178fa515a0f051fda932c1dd04d53db), as the previous commit works fine (d8c96461183f0dc3208c3d624674fa4544212ea5)

 modules/mono/editor/bindings_generator.cpp:1211 - Base type 'ResourceImporter' does not exist, for class EditorImportPlugin
 modules/mono/editor/bindings_generator.cpp:1122 - Generation of the Editor API C# project failed

Please fix soon, as this makes Mono module impossible to use as far as I can tell.