Rust: dependency graph

deps.rs

use std::io;
fn main() {
    println!("digraph {{");
    let mut input = io::stdin();
    let mut lines = input.lines();
    loop {
        match lines.next() {
            Some(line) => {
                let line = line.unwrap();
                let line = line.as_slice();
                if !line.starts_with("DEPS_") { continue }

                let mut parts = line.as_slice().words();
                let name = parts.next().unwrap();
                let name = name.slice_from(5);
                let _ign = parts.next();

                for dep in parts {
                    if dep.starts_with("native:") { continue }
                    if dep == "\\" {
                        let newline = lines.next().unwrap().unwrap();
                        for word in newline.as_slice().words() {
                            if word.starts_with("native:") { continue }
                            println!("    {} -> {};", name, word);
                        }
                    } else {
                        println!("    {} -> {};", name, dep);
                    }
                }
            }
            None => break
        }
    }
    println!("}}");
}

gistfile1.sh

cat rust/mk/crates.mk | ./deps | dot -Tpdf > deps.pdf