Read and parse Cargo.toml using the toml crate defining our own structs

Cargo.toml

This is the real Cargo.toml of this project that we are going to parse

examples/read-and-parse-cargo-toml/Cargo.toml

[package]
name = "read-and-parse-cargo-toml"
version = "0.1.0"
edition = "2021"
rust_version = "1.76"
rust-version = "1.75"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
serde = { version = "1.0.197", features = ["derive"] }
toml = "0.8.12"

Code

This is the code including the definition of the structs.

examples/read-and-parse-cargo-toml/src/main.rs

#![allow(dead_code)]
use serde::Deserialize;
use toml::Value;


#[derive(Deserialize, Debug)]
struct Package {
    name: String,
    version: String,
    edition: Option<String>,

    rust_version: Option<String>,

    #[serde(alias = "rust-version")]
    rust_dash_version: Option<String>,
}


#[derive(Deserialize, Debug)]
struct Cargo {
    package: Package,
    dependencies: Value
}


fn main() {
    let filename = "Cargo.toml";
    let content = std::fs::read_to_string(filename).unwrap();
    let parsed: Cargo = toml::from_str(&content).unwrap();
    println!("{:#?}", parsed);
    println!("name: {}", parsed.package.name);
    println!("version: {}", parsed.package.version);
    println!("edition: {:?}", parsed.package.edition);
    println!("rust_version: {:?}", parsed.package.rust_version);
    println!("rust-version: {:?}", parsed.package.rust_dash_version);

    println!("dependencies: {:?}", parsed.dependencies);
}