Parcel: 🐛 Error compiling simple rust project: multiple input filenames provided

[robjtede]

🐛 bug report

🎛 Configuration (.babelrc, package.json, cli command)

package.json

{
  "name": "rust-wasm",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "MIT",
  "dependencies": {
    "parcel-bundler": "^1.5.1"
  }
}

Run parcel index.js

🤔 Expected Behavior

Should compile

😯 Current Behavior

Console output:

Server running at http://localhost:1234
🚨  /Users/rob/Development/testing/web/rust-wasm/ops.rs: Command failed: rustc +nightly --target wasm32-unknown-unknown -O --crate-type=cdylib /Users/rob/Development/testing/web/rust-wasm/ops.rs -o /Users/rob/Development/testing/web/rust-wasm/.cache/933d122f8546a30c5660c45821247fad.wasm
error: multiple input filenames provided

error: multiple input filenames provided


    at ChildProcess.exithandler (child_process.js:275:12)
    at emitTwo (events.js:126:13)
    at ChildProcess.emit (events.js:214:7)
    at maybeClose (internal/child_process.js:925:16)
    at Socket.stream.socket.on (internal/child_process.js:346:11)
    at emitOne (events.js:116:13)
    at Socket.emit (events.js:211:7)
    at Pipe._handle.close [as _onclose] (net.js:554:12)

🔦 Context

Just a simple test of Rust support

💻 Code Sample

index.js

import { add } from './ops.rs'

console.log(add(4, 6))

ops.rs

#[no_mangle]
pub fn add(a: i32, b: i32) -> i32 {
  return a + b
}

🌍 Your Environment

| Software | Version(s) |
| ---------------- | ---------- |
| Parcel | 1.5.1 |
| Node | v8.9.3 |
| npm/Yarn | npm 5.5.1 |
| Operating System | macOS 10.13.4 beta (17E139j) |
| Rust | nightly-x86_64-apple-darwin unchanged - rustc 1.25.0-nightly (90eb44a58 2018-01-29) |

[davidnagli]

\cc @albizures

[albizures]

hey @robjtede, I made a quick test with the two files that you sent, but I couldn't reproduce the error, could you please provide a repo with this error?

[devongovett]

hmm i only see one input file in the command. maybe the version of rust you're using has a bug?

[robjtede]

@devongovett I was wondering if that might be the case, it's possible its mis-handing the arguments.

@albizures I'll get one together, yes.

[robjtede]

Simplified the command all the way to rustc +nightly ./ops.rs and still getting error: multiple input filenames provided. Seems that +nightly is causing the problems?

[albizures]

@robjtede do you tried without the +nightly?

I have been trying, but I can't get the "multiple input filenames provided" message 😞

[robjtede]

@albizures yes but the wasm32-unknown-unknown target is not available on stable yet, afaik. So while that will work adding the --target argument wont.

I just tried this on a Linux machine and it worked fine. Seems there are other factors...

[albizures]

ooh right, so but you could try, setting nightly as default and without the flag

[robjtede]

Okay, so it turns out that rustc installed via homebrew doesn't respect the +nightly modifier. That coupled with rustup being used to install toolchains and such results in the case where the toolchains are installed to the ~/.cargo installation but parcel tries to use (rightly) the first occurence of rustc in the PATH; which in this case was the homebrew version.

TL;DR: uninstalled homebrew version. it works now.