cargo: rejigger crate type

convert to hybrid crate, with arch-dependent stuff as a ‘bin’ crate,
with the underlying support in ‘lib’.

the reason for this change is to allow for automated unit-testing on
the device-independent bits. to facilitate this, a ‘t’ alias is
provided which will run the unit tests. this target assumes you're on
a linux system, but you can't have everything.

3 files changed, 24 insertions, 6 deletions

diff --git a/src/main.rs b/src/bin/luchie.rs
index 9797da5..7dedc8d 100755
--- a/src/main.rs
+++ b/src/bin/luchie.rs
@@ -3,10 +3,10 @@
 
 //extern crate panic_semihosting;
 
-mod cirque;
-mod log;
-
-use cirque::Cirque;
+use luchie::{
+    cirque::Cirque,
+    log, logger, logln,
+};
 
 use cortex_m::{
     asm::{bkpt, wfi},
@@ -62,7 +62,7 @@ fn main() -> ! {
     );
     let (tx, _) = serial.split();
 
-    log::init(tx);
+    logger::init(tx);
 
     logln!("🐁 luchie starting…");
 
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100755
index 0000000..821bdeb
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,18 @@
+#![no_std]
+
+pub mod cirque;
+pub mod logger;
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn pass() {
+        assert!(0 == 0);
+    }
+
+    #[test]
+    #[should_panic]
+    fn fail() {
+        assert!(1 == 0);
+    }
+}
diff --git a/src/log.rs b/src/logger.rs
index ccc9ebc..453e268 100644
--- a/src/log.rs
+++ b/src/logger.rs
@@ -8,7 +8,7 @@ use cortex_m::interrupt::{self, Mutex};
 #[macro_export]
 macro_rules! log {
     ($($args:tt)+) => {
-        $crate::log::log_args(core::format_args!($($args)+))
+        $crate::logger::log_args(core::format_args!($($args)+))
     }
 }