Converting existing project?

[khuttun]

What would be a good way to convert an existing wgpu desktop project to use cargo-mobile? Have you planned any automation for this use case?

[francesca64]

Sorry for the delay, and thanks for asking!

There's currently no super nice way to do this. The process for doing it manually should look something like this:

1. In another directory, generate a wgpu project using cargo-mobile (or any other type of project - it shouldn't matter)
2. Copy the generated mobile.toml, gen/, and .cargo/ into your existing project
3. Copy the generated .gitignore's section titled # cargo-mobile into your existing project's .gitignore
4. Copy the generated Cargo.toml's [lib], [[bin]], and [target.'cfg(target_os = "android")'.dependencies] sections along with the mobile-entry-point dependency into your existing Cargo.toml
5. Rename your existing main.rs to lib.rs
6. Annotate your main function with #[mobile_entry_point] (with a use mobile_entry_point::mobile_entry_point; somewhere)

Automating this would certainly be a huge improvement. Steps 1 and 2 can be eliminated completely if we make it possible to use an existing project directly. Steps 3 and 5 are easy to automate. Steps 4 and 6 could be impractical to automate completely correctly, but a best-effort implementation would likely be adequate for most people.

[khuttun]

Thanks, this is pretty much exactly what I ended up doing. Actually automating 1 & 2 could be the first step towards direction where cargo-mobile could be used with a Rust project without storing the Android Studio/Xcode files with the project's code. cargo-mobile could just generate those platform specific files when needed. What do you think about this kind of direction for cargo-mobile?