move simple-build to a separate project

This is mostly intended as an example and since this is only useful for
testing it should be relatively safe.

Cargo.lock

@@ -461,6 +461,14 @@ dependencies = [
  "uuid 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "ofborg-simple-build"
+version = "0.1.0"
+dependencies = [
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ofborg 0.1.8",
+]
+
 [[package]]
 name = "openssl"
 version = "0.9.24"

Cargo.toml

@@ -1,6 +1,7 @@
 [workspace]
 members = [
-    "ofborg"
+    "ofborg",
+    "ofborg-simple-build"
 ]
 
 [profile.release]

ofborg-simple-build/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "ofborg-simple-build"
+version = "0.1.0"
+authors = ["Daiderd Jordan <daiderd@gmail.com>"]
+edition = "2018"
+
+[dependencies]
+ofborg = { path = "../ofborg" }
+
+log = "0.3.8"

ofborg-simple-build/src/main.rs

@@ -1,18 +1,22 @@
-use ofborg::config;
-use ofborg::nix;
+#[macro_use]
+extern crate log;
 
 use std::env;
 use std::fs::File;
 use std::io::Read;
 use std::path::Path;
 
-fn main() {
-    let cfg = config::load(env::args().nth(1).unwrap().as_ref());
+use ofborg::config;
+use ofborg::nix;
 
+fn main() {
     ofborg::setup_log();
 
+    log::info!("Loading config...");
+    let cfg = config::load(env::args().nth(1).unwrap().as_ref());
     let nix = cfg.nix();
 
+    log::info!("Running build...");
     match nix.safely_build_attrs(
         &Path::new("./"),
         nix::File::DefaultNixpkgs,