duct.rs

A Rust port of duct.py. Here's the crates.io package. A work in progress.

```rust

[macro_use(cmd)]

extern crate duct;

use duct::sh;

fn main() { // Read the name of the current git branch. let currentbranch = sh("git symbolic-ref --short HEAD").read().unwrap(); asserteq!(current_branch, "master");

// Log the current branch, with git taking over the terminal as usual.
cmd!("git", "log", current_branch).run().unwrap();

// Gratuitously pipe a bunch of commands together.
let result = sh("echo -n The future")
    .then(sh("echo $HORRIFYING_ERROR >&2"))
    .env("HORRIFYING_ERROR", "was then!")
    .stderr_to_stdout()
    .pipe(cmd!("sed", "s/was then/ is now/"))
    .capture_stdout()
    .run()
    .unwrap();
assert_eq!(result.status, 0);
assert_eq!(result.stdout, b"The future is now!\n");
assert_eq!(result.stderr, b"");

} ```