1 files changed, 46 insertions, 0 deletions
diff --git a/third_party/rust/midir/examples/test_list_ports.rs b/third_party/rust/midir/examples/test_list_ports.rs
new file mode 100644
index 0000000000..4bc4c6b948
--- /dev/null
+++ b/third_party/rust/midir/examples/test_list_ports.rs
@@ -0,0 +1,46 @@
+extern crate midir;
+
+use std::io::{stdin, stdout, Write};
+use std::error::Error;
+
+use midir::{MidiInput, MidiOutput, Ignore};
+
+fn main() {
+    match run() {
+        Ok(_) => (),
+        Err(err) => println!("Error: {}", err)
+    }
+}
+
+fn run() -> Result<(), Box<dyn Error>> {
+    let mut midi_in = MidiInput::new("midir test input")?;
+    midi_in.ignore(Ignore::None);
+    let midi_out = MidiOutput::new("midir test output")?;
+
+    let mut input = String::new();
+
+    loop {
+        println!("Available input ports:");
+        for (i, p) in midi_in.ports().iter().enumerate() {
+            println!("{}: {}", i, midi_in.port_name(p)?);
+        }
+        
+        println!("\nAvailable output ports:");
+        for (i, p) in midi_out.ports().iter().enumerate() {
+            println!("{}: {}", i, midi_out.port_name(p)?);
+        }
+
+        // run in endless loop if "--loop" parameter is specified
+        match ::std::env::args().nth(1) {
+            Some(ref arg) if arg == "--loop" => {}
+            _ => break
+        }
+        print!("\nPress <enter> to retry ...");
+        stdout().flush()?;
+        input.clear();
+        stdin().read_line(&mut input)?;
+        println!("\n");
+    }
+    
+    Ok(())
+}