Rust can't find crate

Question

I'm trying to create a module in Rust and then use it from a different file. This is my file structure:

matthias@X1:~/projects/bitter-oyster$ tree . ├── Cargo.lock ├── Cargo.toml ├── Readme.md ├── src │   ├── liblib.rlib │   ├── lib.rs │   ├── main.rs │   ├── main.rs~ │   └── plot │       ├── line.rs │       └── mod.rs └── target     └── debug         ├── bitter_oyster.d         ├── build         ├── deps         ├── examples         ├── libbitter_oyster.rlib         └── native  8 directories, 11 files 

This is Cargo.toml:

[package] name = "bitter-oyster" version = "0.1.0" authors = ["matthias"]  [dependencies] 

This is main.rs:

extern crate plot;  fn main() {     println!("----");     plot::line::test(); } 

This is lib.rs:

mod plot; 

this is plot/mod.rs

mod line; 

and this is plot/line.rs

pub fn test(){     println!("Here line"); } 

When I try to compile my program using: cargo run I get:

   Compiling bitter-oyster v0.1.0 (file:///home/matthias/projects/bitter-oyster) /home/matthias/projects/bitter-oyster/src/main.rs:1:1: 1:19 error: can't find crate for `plot` [E0463] /home/matthias/projects/bitter-oyster/src/main.rs:1 extern crate plot; 

How do I compile my program? As far as I can tell from online documentations this should work, but it doesn't.

Answer 1

If you see this error:

error[E0463]: can't find crate for `PACKAGE`   | 1 | extern crate PACKAGE;   | ^^^^^^^^^^^^^^^^^^^^^ can't find crate 

it could be that you haven't added the desired crate to the dependencies list in your Cargo.toml:

[dependencies] PACKAGE = "1.2.3" 

See specifying dependencies in the Cargo docs.