die

die is a simple Rust library to make it easy to handle errors and exit in command line programs.

# Cargo.toml
[dependencies]
die = "0.2"

Example usage:

use die::Die;
// Result:
Ok(1).die("no number"); // unwraps to 1 successfully
Err("failure").die("strange error"); // prints `strange error` to stderr then exits with code 1

// Option: 
Some(1).die("no number"); // unwraps to 1 successfully
None.die("none option"); // prints `none option` to stderr then exits with code 1

// custom error codes:
Err("failure").die_code("strange error", 4); // prints `strange error` to stderr then exits with code 4
None.die_code("none option", 5); // prints `none option` to stderr then exits with code 5

// die! macro:
die!("argument to -e must be numeric"); // prints message to stderr then exits with code 1
die!(2; "argument to -e must be numeric"); // prints message to stderr then exits with code 2
die!("argument to -e must be numeric"; 3); // prints message to stderr then exits with code 3
die!("argument {} must be {}", "-e", 1; 4); // prints `argument -e must be 1` to stderr then exits with code 4
die!("argument {} must be {}", "-e", 1); // prints `argument -e must be 1` to stderr then exits with code 1
die!(2); // prints nothing, only exits with code 3
die!(); // prints nothing, only exits with code 1

License

This project is licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in die by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.