Replace external bspwm desktop input

We no longer need to setup complicated pipe things to have usable
panels.

src/external.rs → src/bspwm.rs

@@ -1,13 +1,26 @@
 use comm;
 use comm::Channel;
 use config::Config;
-use std::io;
+use std::io::prelude::*;
+use std::io::BufReader;
+use std::process::{Command, Stdio};
+
+pub fn bspwm(tx: &Channel, _cfg: &Config) {
+    let bspc = Command::new("bspc")
+        .arg("subscribe")
+        .arg("report")
+        .stdout(Stdio::piped())
+        .spawn()
+        .ok()
+        .expect("Failed to start bspc subscribe");
+
+    let stdout = bspc.stdout.unwrap();
+    let mut reader = BufReader::new(stdout);
 
-pub fn external(tx: &Channel, _cfg: &Config) {
     let mut line = String::new();
     loop {
         line.clear();
-        io::stdin().read_line(&mut line).ok().expect("Failed to read line");
+        reader.read_line(&mut line).ok().expect("Failed to read line");
         let kind = line.remove(0);
         let line = line.trim();
 

src/main.rs

@@ -1,7 +1,7 @@
 mod sensors;
 mod comm;
 mod config;
-mod external;
+mod bspwm;
 mod bar;
 mod store;
 mod music;
@@ -23,7 +23,7 @@ fn main() {
 
     let cfg = Arc::new(cfg);
     let (tx, rx) = mpsc::channel::<Message>();
-    make_thread(&tx, &cfg, external::external);
+    make_thread(&tx, &cfg, bspwm::bspwm);
     make_thread(&tx, &cfg, sensors::sensors);
     make_thread(&tx, &cfg, music::music);
     make_thread(&tx, &cfg, wm::wm);