Shader hot reloading no longer works for locally imported shaders

[DGriffin91]

Bevy version 0.12

In 0.11 it was possible to hot reload locally imported shaders. This no longer works in 0.12.

#import "shaders/bar.wgsl"::bar
[...]
let a = bar(frag_coord);

If I try to edit shaders/bar.wgsl I get:

2023-11-10T21:55:48.695089Z  INFO bevy_asset::server: Reloading shaders\bar.wgsl because it has changed
2023-11-10T21:55:48.707801Z ERROR bevy_render::render_resource::pipeline_cache: failed to process shader:
error: required import '"shaders/bar.wgsl"' not found
   ┌─ shaders/foo.wgsl:83:13
   │
83 │     let a = bar(frag_coord);
   │             ^
   │
   = missing import '"shaders/bar.wgsl"'

[cart]

This is what the Embedded Asset Source / multiple asset sources was built for. The old DebugAssetServer approach was pretty clunky and I didn't want to carry that pattern forward in Bevy Asset V2. We haven't ported built in shaders over yet unfortunately. I think an important step is to move to implicit module names (as in, the module syntax directly desugars to the embedded asset paths).

Edit: I misread. This is a different issue.

[cart]

Have you enabled the file_watcher feature? I can hot reload changes to custom_material.wgsl and custom_material_import.wgsl in the shader_material example.

[DGriffin91]

I have enabled the file_watcher feature. If I edit custom_material_import.wgsl I get:

2023-11-10T22:44:27.261541Z ERROR bevy_render::render_resource::pipeline_cache: failed to process shader:
error: required import '"shaders/custom_material_import.wgsl"' not found
   ┌─ shaders/custom_material.wgsl:17:94
   │
17 │     return material.color * textureSample(base_color_texture, base_color_sampler, mesh.uv) * COLOR_MULTIPLIER;
   │                                                                                              ^
   │
   = missing import '"shaders/custom_material_import.wgsl"'

[cart]

Very strange. This is what I ran:

git checkout v0.12.0
cargo update
cargo run --example shader_material --features file_watcher

I can change either file, add new imports, etc and it all works.

I'm on linux.