Add simple-build, which builds gnu hello as if it were a PR

ofborg/src/bin/simple-build.rs

@@ -0,0 +1,39 @@
+extern crate ofborg;
+extern crate amqp;
+extern crate env_logger;
+
+#[macro_use]
+extern crate log;
+
+use std::env;
+
+use std::path::Path;
+use std::fs::File;
+use std::io::Read;
+use ofborg::config;
+
+
+fn main() {
+    let cfg = config::load(env::args().nth(1).unwrap().as_ref());
+
+    if let Err(_) = env::var("RUST_LOG") {
+        env::set_var("RUST_LOG", "info");
+        env_logger::init().unwrap();
+        info!("Defaulting RUST_LOG environment variable to info");
+    } else {
+        env_logger::init().unwrap();
+    }
+
+    let nix = cfg.nix();
+
+    match nix.safely_build_attrs(&Path::new("./"), "./default.nix", vec![String::from("hello"),]) {
+        Ok(mut out) => { print!("{}", file_to_str(&mut out)); }
+        Err(mut out) => { print!("{}", file_to_str(&mut out)) }
+    }
+}
+
+fn file_to_str(f: &mut File) -> String {
+    let mut buffer = Vec::new();
+    f.read_to_end(&mut buffer).expect("Reading eval output");
+    return String::from(String::from_utf8_lossy(&buffer));
+}