wasm-pack do not find the correct `target/` folder

[eivbsmed]

🐛 Bug description

wasm-pack do not find the correct target/ folder when using a root level Cargo.toml to define a multi crate work space

🤔 Expected Behavior

It should find the files where the work space put the. In the target folder on the root level.

👟 Steps to reproduce

Set up a workspace whit multiple crates. One of them having a wasm target. Try to compile

  [1/9] Checking `rustc` version...
  [2/9] Checking crate configuration...
  [3/9] Adding WASM target...
  info: component 'rust-std' for target 'wasm32-unknown-unknown' is up to date
  [4/9] Compiling to WASM...
     Compiling id_generator v0.1.0 (<redacted>/id_generator)
      Finished release [optimized] target(s) in 0.27s
  [5/9] Creating a pkg directory...
  [6/9] Writing a package.json...
   [INFO]: Optional fields missing from Cargo.toml: 'description', 'repository', and 'license'. These are not necessary, but recommended
  [7/9] Copying over your README...
  :-) [WARN]: origin crate has no README
  wasm-bindgen 0.2.31 (b04f60cf2)
  [8/9] wasm-bindgen already installed...
  [9/9] Running WASM-bindgen...
  error: failed to read `target/wasm32-unknown-unknown/release/id_generator.wasm`
|       caused by: No such file or directory (os error 2)
Running the wasm-bindgen CLI
Caused by: Process exited with exit code: 1: `wasm-bindgen` did not exit successfully.

stdout:

stderr:

error: failed to read `target/wasm32-unknown-unknown/release/id_generator.wasm`
        caused by: No such file or directory (os error 2)

The file can be found at ../target/wasm32-unknown-unknown/release/id_generator.wasm

🌍 Your environment

Include the relevant details of your environment.
wasm-pack version: 0.5.1
rustc version: 1.31.1 (b6c32da9b 2018-12-18)

[ashleygwilliams]

if you install wasm-pack from master today it will now support workspaces! i'm working super hard to get the release out today (there's been a few set backs...) but this should be released and fixed for you soon!

closing, as this is fixed on master

[eivbsmed]

Thank you :-) I'll test it tomorrow

[kaimast]

Did you test this with custom values for CARGO_TARGET_DIR?

I'm trying to work around rust-lang/cargo#8716 by setting a different target directory.
However, when setting the target dir to something like build, wasm-pack generates binaries in the crate's folder, not the top-level workspace folder.
As a result it fails to generate the final package, with an error like the one below:

error: failed to read `/home/kai/dev/simba/build/wasm32-unknown-unknown/debug/simba_wasm.wasm`

Caused by:
    0: failed to read `/home/kai/dev/simba/build/wasm32-unknown-unknown/debug/simba_wasm.wasm`
    1: No such file or directory (os error 2)
Error: Running the wasm-bindgen CLI
Caused by: failed to execute `wasm-bindgen`: exited with exit status: 1

  full command: "/home/kai/.cache/.wasm-pack/wasm-bindgen-e63eccbd87203048/wasm-bindgen" "/home/kai/dev/simba/build/wasm32-unknown-unknown/debug/simba_wasm.wasm" "--out-dir" "./simba-wasm/pkg" "--typescript" "--target" "web" "--debug"