Use clap to parse arguments from the CLI

Cargo.toml

@@ -7,6 +7,7 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+clap = "2.33.3"
 dbus = "0.9.3"
 midi-control = "0.2.0"
 midir = "0.7.0"

src/main.rs

@@ -3,6 +3,7 @@ use std::{
     time::Duration,
 };
 
+use clap::clap_app;
 use dbus::blocking::Connection;
 use dbus::message::MatchRule;
 use dbus::Message;
@@ -10,13 +11,39 @@ use dbus::{arg::messageitem::MessageItem, channel::MatchingReceiver};
 use midi_control::*;
 use midir::*;
 
+struct BwowwwConfig {
+    browser: String,
+    port: usize,
+}
+
+fn parse_cli_opts() -> BwowwwConfig {
+    let matches = clap_app!(bwowww =>
+        (version: "1.0")
+        (author: "Agatha Rose <agatharose@wantscuddl.es>")
+        (@arg BROWSER: -b --browser +takes_value "Set a custom browser")
+        (@arg PORT: -p --port +takes_value "Select a MIDI port")
+    )
+    .get_matches();
+
+    let browser = matches.value_of("BROWSER").unwrap_or("Nightly");
+    let browser = browser.to_string();
+
+    let port = matches
+        .value_of("PORT")
+        .and_then(|s| s.parse().ok())
+        .unwrap_or(1);
+
+    BwowwwConfig { browser, port }
+}
+
 fn main() {
+    let conf = parse_cli_opts();
+
     let midi_device = MidiOutput::new("synth output meow").expect("could not find device");
     let ports = midi_device.ports();
     // assumes that the device is connected on port 1
-    // TODO: add port selection
     let midi_out = midi_device
-        .connect(&ports[1], "meow port")
+        .connect(&ports[conf.port], "meow port")
         .expect("oh dear");
     let midi_out = Arc::new(Mutex::new(midi_out));
 
@@ -40,7 +67,7 @@ fn main() {
         conn.start_receive(
             rule,
             Box::new(move |msg, _| {
-                midi_hook(midi_out.clone(), &msg);
+                midi_hook(&conf, midi_out.clone(), &msg);
                 true
             }),
         );
@@ -48,7 +75,7 @@ fn main() {
         // Start matching using old scheme
         rule.eavesdrop = true;
         conn.add_match(rule, move |_: (), _, msg| {
-            midi_hook(midi_out.clone(), &msg);
+            midi_hook(&conf, midi_out.clone(), &msg);
             true
         })
         .expect("add_match failed");
@@ -60,7 +87,7 @@ fn main() {
     // TODO: use the ctrlc crate to handle the midi connection closing
 }
 
-fn midi_hook(midi_out: Arc<Mutex<MidiOutputConnection>>, msg: &Message) {
+fn midi_hook(conf: &BwowwwConfig, midi_out: Arc<Mutex<MidiOutputConnection>>, msg: &Message) {
     let args = msg.get_items();
 
     // do nothing if args are empty
@@ -69,8 +96,7 @@ fn midi_hook(midi_out: Arc<Mutex<MidiOutputConnection>>, msg: &Message) {
     }
 
     // only apply to firefox notifications
-    // TODO: make browser name configurable
-    if args[0] == "Nightly".into() {
+    if args[0] == conf.browser.as_str().into() {
         // get the dict of values inside the message's args
         let dict_values = match &args[6] {
             MessageItem::Dict(v) => v.clone().into_vec(),