Rust

language: rust
outputs:
  type: object
  properties:
    input_bytes:
      type: number

use std::{env, error::Error, fs};

fn main() -> Result<(), Box<dyn Error>> {
    let path = env::var("TERMORQ_INPUT")?;
    let input = fs::read(path)?;
    println!("{{\"input_bytes\":{}}}", input.len());
    Ok(())
}

Things to know

• The runner compiles with rustc --edition 2024 -O, then runs the binary. There’s no Cargo, so crates such as serde_json aren’t available.
• The standard library has no JSON parser. Use Rust for byte, line, or number processing, and use another language for JSON field transformations.
• Use format! and println! for output. Escape { and } by doubling them. Only interpolate values that can’t contain quotes, backslashes, or newlines, or escape them yourself.
• Returning Err from main exits with a non-zero code, so the block fails.

use std::{env, fs};
fn main() {
    let text = fs::read_to_string(env::var("TERMORQ_INPUT").unwrap()).unwrap();
    println!("{{\"lines\":{}}}", text.lines().count());
}