Rust 导入：将大文件拆分为小文件

Question

我正在用 rust 编写一个 TUI 应用程序来管理一些游戏服务器。应用程序本身运行良好，但 main.rs 文件现在超过 1k 行，因此我决定将其拆分为多个文件以使其更易于使用。每个文件都需要能够访问其他文件中的结构和函数。拆分文件具有以下结构。

src \
    main.rs
    render.rs
    ark.rs
    db.rs

这是我当前的 Cargo.toml

[package]
name = "ark-manager"
version = "0.1.0"
authors = ["Nan0Scho1ar <scorch267@gmail.com>"]
edition = "2018"

[dependencies]
crossterm = { version = "0.19", features = [ "serde" ] }
serde = {version = "1.0", features = ["derive"] }
serde_json = "1.0"
chrono = { version = "0.4", features = ["serde"] }
rand = { version = "0.7.3", default-features = false, features = ["std"] }
tui = { version = "0.14", default-features = false, features = ['crossterm', 'serde'] }
thiserror = "1.0"

我尝试按照我在此处找到的文档进行操作。 https://doc.rust-lang.org/stable/book/ch07-05-separating-modules-into-different-files.html

这让我相信解决方案看起来像这样。

main.rs

mod render;
mod db;
mod ark;

pub use crate::render::*;
pub use crate::db::*;
pub use crate::ark::*;

//Main loop etc
...

ark.rs

pub mod ark {
    pub use crate::render::*;
    pub use crate::db::*;

    //Structs, enums etc
    pub enum Event<I> {
        Input(I),
        Tick
    }
    ...
}

db.rs

pub mod db {
    pub use crate::render::*;
    pub use crate::ark::*;


    //DB functions
    ...
}

render.rs

pub mod render {
    pub use crate::db::*;
    pub use crate::ark::*;

    //Render functions
    ...
}

我还更新了对现在位于单独模块中的事物的引用

//E.G.
if let Ok(_) = tx.send(Event::Tick) {
//Becomes
if let Ok(_) = tx.send(ark::Event::Tick) {
//And
Event::Input(event) => match event.code {
//Becomes
ark::Event::Input(event) => match event.code {

但这导致了以下错误。

error[E0433]: failed to resolve: could not find `Event` in `ark`
  --> src/main.rs:79:45
   |
79 |                 if let Ok(_) = tx.send(ark::Event::Tick) {
   |                                             ^^^^^ could not find `Event` in `ark`

error[E0433]: failed to resolve: could not find `Event` in `ark`
   --> src/main.rs:216:22
    |
216 |                 ark::Event::Input(event) => match event.code {
    |                      ^^^^^ could not find `Event` in `ark`

error[E0433]: failed to resolve: could not find `Event` in `ark`
   --> src/main.rs:226:22
    |
226 |                 ark::Event::Tick => {}
    |                      ^^^^^ could not find `Event` in `ark`

error[E0433]: failed to resolve: could not find `Event` in `ark`
   --> src/main.rs:230:22
    |
230 |                 ark::Event::Input(event) => match event.code {
    |                      ^^^^^ could not find `Event` in `ark`

...

在尝试让它工作一段时间后，我决定看看其他人是如何解决这个问题的，我找到了许多关于堆栈溢出问题的答案，比如这个。 Rust import error 我尝试使用接受的答案中概述的导入，看起来像这样。

main.rs

mod render;
mod db;
mod ark;

//Main loop etc
...

ark.rs

use render;
use db;

//Structs, enums etc
...

db.rs

use render;
use ark;

//DB functions
...

render.rs

use db;
use ark;

//Render functions
...

但是这种结构会导致以下错误。

error[E0432]: unresolved import `db`
 --> src/render.rs:1:9
  |
1 |     use db;
  |         ^^ no external crate `db`

error[E0432]: unresolved import `ark`
 --> src/render.rs:2:9
  |
2 |     use ark;
  |         ^^^ no external crate `ark`

error[E0432]: unresolved import `render`
 --> src/db.rs:1:9
  |
1 |     use render;
  |         ^^^^^^ no external crate `render`

error[E0432]: unresolved import `ark`
 --> src/db.rs:2:9
  |
2 |     use ark;
  |         ^^^ no external crate `ark`

error[E0432]: unresolved import `render`
 --> src/ark.rs:1:9
  |
1 |     use render;
  |         ^^^^^^ no external crate `render`

error[E0432]: unresolved import `db`
 --> src/ark.rs:2:9
  |
2 |     use db;
  |         ^^ no external crate `db`

...

将我的 main.rs 文件拆分为 4 个较小文件的正确方法是什么，以便每个文件都可以使用其他文件中的结构和函数。

Answer 1

主要：

mod render;
mod db;
mod ark;

然后在其他所有方面：

use crate::render;
use crate::db;
// ...