From 80433de3ad9fb71065b9aa6e4994f4a5a02f8316 Mon Sep 17 00:00:00 2001
From: Colin Walters <walters@verbum.org>
Date: Fri, 14 Sep 2018 12:27:41 -0400
Subject: [PATCH] build: Add Rust

So far we have lots of shell script, some Python, Go from mantle...
clearly, we need to add Rust!

More seriously so...I like the language, I am not excited about
writing more dynamically typed and slow shell script/Python.

There's a definite argument for Go, since we could share code
with Mantle.  I personally like Rust a lot though...but
this is an RFE to see how people feel.

My vision for this was that we could start implementing some of
the VM installation work in it, along with defining Serde
structs for the metadata, etc.
---
 Cargo.toml              | 12 ++++++++++++
 Makefile                |  8 ++++++--
 src/coreos-assembler.rs | 38 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 56 insertions(+), 2 deletions(-)
 create mode 100644 Cargo.toml
 create mode 100644 src/coreos-assembler.rs

diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000000..1e0a91932a
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "coreos-assembler"
+version = "0.1.0"
+authors = ["Colin Walters <walters@verbum.org>"]
+
+[dependencies]
+clap = "~2.28"
+failure = "0.1.1"
+
+[[bin]]
+name = "coreos-assembler-rs"
+path = "src/coreos-assembler.rs"
\ No newline at end of file
diff --git a/Makefile b/Makefile
index 597abdf843..d0a1ec358c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,15 +1,19 @@
 PREFIX ?= /usr
 DESTDIR ?=
 
-.PHONY: all mantle install
+.PHONY: all rust mantle install
 
-all: mantle
+all: mantle rust
+
+rust:
+	cargo build --release
 
 mantle:
 	cd mantle && ./build ore kola kolet
 
 install:
 	install -D -t $(DESTDIR)$(PREFIX)/bin coreos-assembler $$(find src/compat -maxdepth 1 -type f)
+	install -D -t $(DESTDIR)$(PREFIX)/libexec target/release/coreos-assembler-rs
 	install -D -t $(DESTDIR)$(PREFIX)/libexec/coreos-assembler $$(find src/ -maxdepth 1 -type f)
 	install -D -t $(DESTDIR)$(PREFIX)/bin mantle/bin/{ore,kola}
 	install -D -m 0755 -t $(DESTDIR)$(PREFIX)/lib/kola/amd64 mantle/bin/amd64/kolet
diff --git a/src/coreos-assembler.rs b/src/coreos-assembler.rs
new file mode 100644
index 0000000000..5547ad8005
--- /dev/null
+++ b/src/coreos-assembler.rs
@@ -0,0 +1,38 @@
+extern crate clap;
+#[macro_use]
+extern crate failure;
+
+use failure::Error;
+use clap::{App, SubCommand};
+
+fn hello() -> Result<(), Error> {
+    println!("🦀");
+    Ok(())
+}
+
+fn run() -> Result<(), Error> {
+    let matches = App::new("coreos-assembler")
+        .version("0.1")
+        .about("CoreOS assembler")
+        .subcommand(
+            SubCommand::with_name("hello")
+                .about("Say hello")
+        )
+        .get_matches();
+
+    match matches.subcommand() {
+        ("hello", _) => hello(),
+        ("", _) => bail!("No command given"),
+        _ => unreachable!(),
+    }
+}
+
+fn main() {
+    match run() {
+        Ok(_) => {}
+        Err(e) => {
+            eprintln!("{:?}", e);
+            std::process::exit(1)
+        }
+    }
+}