Crate cargo_list 

use cargo_list::{expanduser, Crates};
let path = expanduser("~/.cargo/.crates2.json");

match Crates::from(&path) {
    Ok(installed) => {
        if installed.is_empty() {
            println!("No crates installed!");
        } else {
            let all = installed.crates();
            let outdated = all
                .par_iter()
                .filter_map(|(&name, &c)| c.outdated.then_some((name, c)))
                .collect::<BTreeMap<_, _>>();

            if outdated.is_empty() {
                // List all crates in CSV
                println!("Name,Installed");
                for (name, c) in &all {
                    println!("{name},{}", c.installed);
                }
            } else {
                // List outdated crates in CSV
                println!("Name,Installed,Available");
                for (name, c) in &outdated {
                    println!("{name},{},{}", c.installed, c.available);
                }

                // Print the `cargo install` commands for outdated crates
                // for command in outdated
                //     .iter()
                //     .map(|(_name, c)| c.update_command().join(" "))
                // {
                //     println!("{command}");
                // }

                // Update outdated crates
                // outdated.iter().for_each(|(_name, c)| c.update());
            }
        }
    }
    Err(e) => {
        eprintln!("Error: {e}");
    }
}

If you want to include just a subset of the crates, instead of Crates::from(&path), use Crates::from_include(&path, &patterns) where patterns is a slice of &str regex patterns.

Structs

Crate

Individual installed crate

Crates

All installed crates

Enums

Kind

Crate kind

Constants

ALL_KINDS

All crate kinds

Functions

active_toolchain

Get the active toolchain

expanduser

Expand a path with an optional tilde (~)

latest

Get the latest available (not prerelease or yanked) version(s) for a crate, optionally matching a required version