support custom profiles instead of the predefines

[liuhongxuan23]

$ wasm-pack build --profile release-wasm
[INFO]: Checking for the Wasm target...
[INFO]: Compiling to Wasm...
error: conflicting usage of --profile=release-wasm and --release
The `--release` flag is the same as `--profile=release`.
Remove one flag or the other to continue.
Error: Compiling your crate to WebAssembly failed
Caused by: failed to execute `cargo build`: exited with exit status: 101
  full command: "cargo" "build" "--lib" "--release" "--target" "wasm32-unknown-unknown" "--profile" "release-wasm"

[fbjork]

+1

[babymotte]

+1

[mitiko]

This would be very useful for conditional compilation in staging environments, where binary size is still important but you need to do some extra logging for example.

[float3]

Please implement this!

[float3]

https://github.com/rustwasm/wasm-pack/blob/master/src/build/mod.rs#L103-L105 it looks like they don't specify a profile if you run wasm-pack with --dev

edit: https://github.com/rustwasm/wasm-pack/blob/b9b38890cf47074417c76b6d19f08a2682f4207b/src/build/mod.rs#L103-L105

[net]

https://github.com/rustwasm/wasm-pack/blob/master/src/build/mod.rs#L103-L105 it looks like they don't specify a profile if you run wasm-pack with --dev

Unfortunately, that will also cause wasm-pack to use the debug target directory.

https://github.com/rustwasm/wasm-pack/blob/master/src/bindgen.rs#L26-L29