rust的包管理

foo/bar.rs
foo.rs
main.rs

//bar.rs

pub struct Bar;
impl Bar {
    pub fn hi() {
        println!("hello Bar");
    }
}

//foo.rs

mod bar;
pub use self::bar::Bar;

pub fn do_foo() {
    println!("hi from foo!");
}

//main.rs
mod foo;
use foo::Bar;

fn main() {
    foo::do_foo();
    Bar::hi();
    println!("Hello, world!");
}

foo/f1.rs
foo/g1.rs
foo/mod.rs
main.rs

//f1.rs
pub fn ff() {
    println!("f1 func")
}

//g1.rs
pub fn gf() {
    println!("g1 func")
}
//mod.rs
pub mod g1;
pub mod f1;

//main.rs

mod foo;
use foo::f1;
use foo::g1;

fn main() {
    println!("Hello, world!");
    
    f1::ff();
    g1::gf();

}