[bug] sidecar: No such file or directory (os error 2)

[trevorparscal]

Describe the bug

Appears to be similar to issue #3612.

Works in build, but not in dev.

Moving app-* (app-aarch64-apple-darwin in this case) to the src-tauri directory and changing "bin/app" to "app" did not work.

Reproduction

1. Add a sidecar app

Relevant sections of my tauri.conf.json

{
    "tauri": {
        "allowlist": {
            "shell": {
                "sidecar": true,
                "scope": [
                    {
                        "name": "bin/app",
                        "sidecar": true
                    }
                ]
            },
            ...
        },
        "bundle": {
            "externalBin": [
                "bin/app"
            ],
            ...
        }
        ...
    }
}

And of the JavaScript...

const command = Command.sidecar( 'bin/app' );
console.log( await command.execute() );

2. Use tauri dev
3. See "No such file or directory (os error 2)" error in console when running command
4. See that it works with tauri build

Expected behavior

Dev and build should behave the same.

Platform and versions

macOS 12.4 (21F79), M1 chip

tauri = { version = "1.0.5", features = ["api-all"] }

tauri-build = { version = "1.0.4", features = [] }

Stack trace

No response

Additional context

The example sidecar app only has one line, logging a string to the console.

[trevorparscal]

I solved this by changing the name of the sidecar to something other than app, something I discovered as a possible fix by finding 3663 was resolved this way as well.

However, even though the documentation uses an example of "my_sidecar", the example uses "app", which is how I found my way down this path.

Maybe there could be some sort of error message forbidding this, or some fix to ensure tauri isn't confused by it?

[trevorparscal]

Perhaps I should leave this open, assuming this is a bug in tauri.

[FabianLars]

i thought that this is a known limitation, in which case we'd need to change the example, but maybe it indeed is just a bug 🤔

[lucasfernog]

Happens because the CLI renames the app executable (from Cargo.toml to the product name defined in the config file), so you lose the sidecar binary in that process. I'll add a validation for it.

[HerrHansen]

i thought that this is a known limitation, in which case we'd need to change the example, but maybe it indeed is just a bug 🤔

+1 For changing the example. Spent hours until I found my way to this thread 🙃.