Add an option to --keep-debug

[connor4312]

💡 Feature description

With rustwasm/wasm-bindgen#2389, DWARF symbols work in wasm-bindgen when --keep-debug is passed. However, this cannot be passed from the wasm-pack interface (as far as I know)

💻 Basic example

Currently one manually has to do

cargo build --target wasm32-unknown-unknown &&  wasm-bindgen --keep-debug --web --out-dir pkg ./target/wasm32-unknown-unknown/

It would be better to add some wasm-pack build --keep-debug, or even make that the default for dev builds.

[wvffle]

+1

[TimoWilhelm]

While this is disabled by default in the Cargo.toml Configuration it can be enabled by adding the following to your Cargo.toml and running with the --dev profile:

[package.metadata.wasm-pack.profile.dev.wasm-bindgen]
dwarf-debug-info = true

if you run it with RUST_LOG=info wasm-pack build you should see that it adds the --keep-debug flag to the wasm-bindgen command.

[haraldreingruber-dedalus]

Here is a small demo repo, for DWARF debugging:
https://github.com/haraldreingruber-dedalus/rust-wasm-dwarf-debugging
Happy to hear if that's useful for anybody, or if something can be improved. Also, PR's welcome!