Panic when calling shell() on AppHandle

[aakside]

I've been trying to start a sidecar with Tauri v2, but I keep getting a state() called before manage() for given type error, and it seems to happen on a call to shell on an AppHandle. See below for more details.

Cargo.toml:

[package]
name = "shell-test"
version = "0.1.0"
description = "A Tauri App"
authors = ["you"]
edition = "2021"

[lib]
name = "shell_test_lib"
crate-type = ["staticlib", "cdylib", "rlib"]

[build-dependencies]
tauri-build = { version = "2", features = [] }

[dependencies]
tauri = { version = "2", features = [] }
tauri-plugin-opener = "2"
serde = { version = "1", features = ["derive"] }
serde_json = "1"
tauri-plugin-shell = "2.2.0"

src/lib.rs:

use tauri::App;
use tauri_plugin_shell::ShellExt;

#[tauri::command]
fn start_sidecar(app_handle: tauri::AppHandle) -> () {
    let shell = app_handle.shell();

    let command = shell
        .sidecar("node-web-server")
        .unwrap();

    ()
}

fn set_up_tauri_app(app: &mut App) -> () {
    start_sidecar(app.handle().clone());
    ()
}

#[cfg_attr(mobile, tauri::mobile_entry_point)]
pub fn run() {
    tauri::Builder::default()
        .plugin(tauri_plugin_opener::init())
        .setup(|app| {
            set_up_tauri_app(app);
            Ok(())
        })
        .invoke_handler(tauri::generate_handler![start_sidecar])
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}

The error and backtrace:

thread 'main' panicked at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tauri-2.1.1/src/lib.rs:735:8:
state() called before manage() for given type
stack backtrace:
   0: rust_begin_unwind
             at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/std/src/panicking.rs:665:5
   1: core::panicking::panic_fmt
             at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/panicking.rs:74:14
   2: core::panicking::panic_display
             at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/panicking.rs:264:5
   3: core::option::expect_failed
             at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/option.rs:2030:5
   4: core::option::Option<T>::expect
             at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/option.rs:933:21
   5: tauri::Manager::state
             at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tauri-2.1.1/src/lib.rs:731:5
   6: <T as tauri_plugin_shell::ShellExt<R>>::shell
             at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tauri-plugin-shell-2.2.0/src/lib.rs:99:9
   7: shell_test_lib::start_sidecar
             at ./src/lib.rs:6:17
   8: shell_test_lib::set_up_tauri_app
             at ./src/lib.rs:16:5
   9: shell_test_lib::run::{{closure}}
             at ./src/lib.rs:25:13
  10: core::ops::function::FnOnce::call_once{{vtable.shim}}
             at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/ops/function.rs:250:5
  11: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/alloc/src/boxed.rs:2070:9
  12: tauri::app::setup
             at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tauri-2.1.1/src/app.rs:2150:5
  13: tauri::app::App<R>::run::{{closure}}
             at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tauri-2.1.1/src/app.rs:1148:25
  14: tauri_runtime_wry::handle_event_loop
             at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tauri-runtime-wry-2.2.0/src/lib.rs:3585:7
  15: <tauri_runtime_wry::Wry<T> as tauri_runtime::Runtime<T>>::run::{{closure}}
             at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tauri-runtime-wry-2.2.0/src/lib.rs:2832:7
  16: tao::platform_impl::platform::event_loop::EventLoop<T>::run_return::{{closure}}
             at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tao-0.30.8/src/platform_impl/linux/event_loop.rs:1094:24
  17: glib::main_context::<impl glib::auto::main_context::MainContext>::with_thread_default
             at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/glib-0.18.5/src/main_context.rs:154:12
  18: tao::platform_impl::platform::event_loop::EventLoop<T>::run_return
             at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tao-0.30.8/src/platform_impl/linux/event_loop.rs:1018:5
  19: tao::platform_impl::platform::event_loop::EventLoop<T>::run
             at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tao-0.30.8/src/platform_impl/linux/event_loop.rs:972:21
  20: tao::event_loop::EventLoop<T>::run
             at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tao-0.30.8/src/event_loop.rs:215:5
  21: <tauri_runtime_wry::Wry<T> as tauri_runtime::Runtime<T>>::run
             at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tauri-runtime-wry-2.2.0/src/lib.rs:2812:5
  22: tauri::app::App<R>::run
             at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tauri-2.1.1/src/app.rs:1146:5
  23: tauri::app::Builder<R>::run
             at /home/aak/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tauri-2.1.1/src/app.rs:2069:5
  24: shell_test_lib::run
             at ./src/lib.rs:22:5
  25: shell_test::main
             at ./src/main.rs:5:5
  26: core::ops::function::FnOnce::call_once
             at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[FabianLars]

You have to register the shell plugin like the opener plugin on the tauri::Builder before you can use the shell() function