Link library with a test C program

Make a test `includer.c` program that includes the Rust library and
calls our `c_run_key_action()` to see if it actually works. Currently it
doesn't, we get `(null)` printed to stdout.

Add a Makefile with the build command for the C program.

cbindgen.toml:
Remove `KeyActionResult` from exported types, as the `Option` field it
contains caused `gcc` to complain.

cocoa_bridge.rs:
* Comment out all 'cocoa' crate related code as the 'cocoa' code was
  interfering with GCC compilation as a result of my not linking to
  Cocoa frameworks.
* Add a new test map definition that corresponds with the one we look
  for in `includer.c`.

parser.rs:
Add `#[repr(C)]` to `MapKind` because it needs to be exported in the
library and generated into our C header file.

3 files changed, 28 insertions, 26 deletions

diff --git a/src/cocoa_bridge.rs b/src/cocoa_bridge.rs
index f2d5f45..fe65533 100644
--- a/src/cocoa_bridge.rs
+++ b/src/cocoa_bridge.rs
@@ -2,8 +2,8 @@ use std::ffi::CString;
 use std::ptr;
 use std::slice;
 
-use cocoa::base::nil;
-use cocoa::foundation::{NSArray, NSAutoreleasePool, NSDictionary};
+// use cocoa::base::nil;
+// use cocoa::foundation::{NSArray, NSAutoreleasePool, NSDictionary};
 use libc::{c_char, size_t};
 
 use {HeadphoneButton, MapGroup, MapKind};
@@ -12,28 +12,28 @@ use {HeadphoneButton, MapGroup, MapKind};
 struct renameMeMapGroup {
 }
 
-pub extern "C" fn parse_mappings() {
-    let sample_maps = "map <up> k
-map <down> j";
-
-    let map_group = MapGroup::parse(sample_maps).unwrap();
-
-    unsafe {
-        let _pool = NSAutoreleasePool::new(nil);
-
-        let maps = NSDictionary::init(nil).autorelease();
-        let modes = NSDictionary::init(nil).autorelease();
-
-        for (trigger, action) in map_group.maps {
-            // let t = NSArray::arrayWithObjects(nil, &trigger).autorelease();
-
-            // maps.
-        }
-
-        for (trigger, modes) in map_group.modes {
-        }
-    }
-}
+// pub extern "C" fn parse_mappings() {
+//     let sample_maps = "map <up> k
+// map <down> j";
+//
+//     let map_group = MapGroup::parse(sample_maps).unwrap();
+//
+//     unsafe {
+//         let _pool = NSAutoreleasePool::new(nil);
+//
+//         let maps = NSDictionary::init(nil).autorelease();
+//         let modes = NSDictionary::init(nil).autorelease();
+//
+//         for (trigger, action) in map_group.maps {
+//             // let t = NSArray::arrayWithObjects(nil, &trigger).autorelease();
+//
+//             // maps.
+//         }
+//
+//         for (trigger, modes) in map_group.modes {
+//         }
+//     }
+// }
 
 // Different method:
 // Call Rust function with trigger
@@ -97,7 +97,8 @@ pub extern "C" fn run_key_action(
     trigger: &[HeadphoneButton]
 ) -> Option<KeyActionResult> {
     let sample_maps = "map <up> k
-map <down> j";
+map <down> j
+map <play><down> works!";
 
     // Figure out how to persist this without re-parsing
     let map_group = MapGroup::parse(sample_maps).unwrap();
diff --git a/src/lib.rs b/src/lib.rs
index cf7dd1e..3124178 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-extern crate cocoa;
+// extern crate cocoa;
 
 #[macro_use]
 extern crate combine;
diff --git a/src/parser.rs b/src/parser.rs
index c6c8cce..1d9aa56 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -23,6 +23,7 @@ pub enum HeadphoneButton {
 type Trigger = Vec<HeadphoneButton>;
 type Action = String;
 
+#[repr(C)]
 #[derive(Debug, PartialEq)]
 pub enum MapKind {
     Map,