Updates to address comments

README.md

@@ -15,13 +15,14 @@ This is the harmony CLI, a minimal implementation
 The current help text:
 
 ```
-Usage: example-cli [OPTIONS] --run <RUN>
+Usage: example-cli [OPTIONS]
 
 Options:
   -r, --run <RUN>        Name of score to run
   -i, --interactive      Run interactive or not
   -a, --all              Run all or nth
   -n, --number <NUMBER>  Run nth matching, zero indexed [default: 0]
+  -l, --list             list scores, will also be affected by run filter
   -h, --help             Print help
   -V, --version          Print version
 ```

harmony_cli/Cargo.toml

@@ -12,4 +12,5 @@ harmony_tui = { path = "../harmony_tui", optional = true }
 
 
 [features]
+default = ["tui"]
 tui = ["dep:harmony_tui"]

harmony_cli/src/lib.rs

@@ -1,5 +1,5 @@
-use clap::Parser;
 use clap::builder::ArgPredicate;
+use clap::{Arg, CommandFactory, Parser};
 use harmony;
 use harmony::{score::Score, topology::Topology};
 
@@ -14,9 +14,9 @@ struct Args {
     #[arg(
         short,
         long,
-        default_value_if("interactive", ArgPredicate::IsPresent, Some("unused"))
+        default_value_if("interactive", ArgPredicate::IsPresent, Some(""))
     )]
-    run: String,
+    run: Option<String>,
 
     /// Name of score to run
     #[cfg(not(feature = "tui"))]
@@ -34,6 +34,10 @@ struct Args {
     /// Run nth matching, zero indexed
     #[arg(short, long, default_value_t = 0)]
     number: u8,
+
+    /// list scores, will also be affected by run filter
+    #[arg(short, long, default_value_t = false)]
+    list: bool,
 }
 
 pub async fn init<T: Topology + std::fmt::Debug + Send + Sync + 'static>(
@@ -51,24 +55,40 @@ pub async fn init<T: Topology + std::fmt::Debug + Send + Sync + 'static>(
         return Err("Not compiled with interactive support".into());
     }
 
+    // if no score to run provided, and list isn't specified, print help
+    if args.run.is_none() && !args.list {
+        Args::command().print_help();
+        return Ok(());
+    }
+
     let scores = maestro.scores();
     let scores_read = scores.read().expect("Should be able to read scores");
-    let filtered: Vec<Box<dyn Score<T>>> = scores_read
-        .iter()
-        .map(|s| s.clone_box())
-        .filter(|s| s.name().contains(&args.run))
-        .collect();
+    let scores_vec: Vec<Box<dyn Score<T>>> = match args.run.clone() {
+        Some(filter) => scores_read
+            .iter()
+            .map(|s| s.clone_box())
+            .filter(|s| s.name().contains(&filter))
+            .collect(),
+        None => scores_read.iter().map(|s| s.clone_box()).collect(),
+    };
 
-    if filtered.len() == 0 {
+    // if list option is specified, print filtered list and exit
+    if args.list {
+        println!("Available scores: {:#?}", scores_vec);
+        return Ok(());
+    }
+
+    if scores_vec.len() == 0 {
         return Err("No score containing query found".into());
     }
 
+    // if all is specified, run all. Otherwise, run the first match or specified index
     if args.all {
-        for s in filtered {
+        for s in scores_vec {
             println!("Running: {}", s.clone_box().name());
         }
     } else {
-        let score = filtered.get(args.number as usize);
+        let score = scores_vec.get(args.number as usize);
         match score {
             Some(s) => println!("Running: {}", s.clone_box().name()),
             None => return Err("Invalid index given".into()),