如何指定在货物工作区的根目录中默认运行哪个板条箱？

Question

现在我有一个有三个成员的货物工作区。

[workspace]
members = [
    "foo",
    "bar",
    "baz",
]

如果在根目录中运行cargo run，则会出现以下错误：

错误：清单路径/home/lukas/dev/mahboi/cargo.toml是一个虚拟清单，但此命令需要在此工作区中针对实际包运行

default-members = ["foo"]

Answer 1

这是从Rust 1.30开始提供的。以下是我测试的完整文件集：

Cargo.Toml

[workspace]
members = [
    "foo",
    "bar",
    "baz",
]

foo/cargo.toml

[package]
name = "foo"
version = "0.1.0"
authors = ["An Devloper <[e-mail]>"]

[dependencies]

fn main() {
    println!("Hello, world!");
}

[package]
name = "bar"
version = "0.1.0"
authors = ["An Devloper <[e-mail]>"]

[dependencies]

#[cfg(test)]
mod tests {
    #[test]
    fn it_works() {
        assert_eq!(2 + 2, 4);
    }
}

[package]
name = "baz"
version = "0.1.0"
authors = ["An Devloper <[e-mail]>"]

[dependencies]

#[cfg(test)]
mod tests {
    #[test]
    fn it_works() {
        assert_eq!(2 + 2, 4);
    }
}

$ tree .
.
├── Cargo.lock
├── Cargo.toml
├── bar
│   ├── Cargo.toml
│   └── src
│       └── lib.rs
├── baz
│   ├── Cargo.toml
│   └── src
│       └── lib.rs
├── foo
│   ├── Cargo.toml
│   └── src
│       └── main.rs
├── src
│   └── lib.rs
└── target
    └── ...

$ cargo run
   Compiling baz v0.1.0 (file:///private/tmp/example/baz)
   Compiling bar v0.1.0 (file:///private/tmp/example/bar)
   Compiling foo v0.1.0 (file:///private/tmp/example/foo)
    Finished dev [unoptimized + debuginfo] target(s) in 0.39s
     Running `target/debug/foo`
Hello, world!

[package]
name = "foo"
version = "0.0.1"
authors = ["An Devloper <[e-mail]>"]
default-run = "foo"