Fix installed tool command probes

crates/clusterflux-coordinator/src/main.rs

@@ -5,17 +5,40 @@ use clusterflux_core::{ProjectId, TenantId, UserId};
 use serde_json::json;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let raw_args = std::env::args().skip(1).collect::<Vec<_>>();
+    match raw_args.as_slice() {
+        [flag] if matches!(flag.as_str(), "--version" | "-V") => {
+            println!("clusterflux-coordinator {}", env!("CARGO_PKG_VERSION"));
+            return Ok(());
+        }
+        [flag] if matches!(flag.as_str(), "--help" | "-h") => {
+            println!(
+                "Clusterflux coordinator.\n\n\
+                 Usage: clusterflux-coordinator [OPTIONS]\n\n\
+                 Options:\n  \
+                   --listen <ADDRESS>                 [default: 127.0.0.1:0]\n  \
+                   --allow-local-trusted-loopback\n  \
+                   -h, --help\n  \
+                   -V, --version"
+            );
+            return Ok(());
+        }
+        _ => {}
+    }
+
     let mut listen = "127.0.0.1:0".to_owned();
     let mut allow_local_trusted = std::env::var("CLUSTERFLUX_ALLOW_LOCAL_TRUSTED_LOOPBACK")
         .ok()
         .as_deref()
         == Some("1");
-    let mut args = std::env::args().skip(1);
+    let mut args = raw_args.into_iter();
     while let Some(arg) = args.next() {
         if arg == "--listen" {
             listen = args.next().ok_or("--listen requires an address")?;
         } else if arg == "--allow-local-trusted-loopback" {
             allow_local_trusted = true;
+        } else {
+            return Err(format!("unknown argument: {arg}").into());
         }
     }