Kingfisher can now generate an auditor-friendly HTML report

src/cli/commands/output.rs

@@ -52,6 +52,9 @@ pub enum ReportOutputFormat {
 
     /// SARIF format (experimental)
     Sarif,
+
+    /// Standalone HTML audit report
+    Html,
 }
 
 // -----------------------------------------------------------------------------

src/cli/commands/view.rs

@@ -1,5 +1,6 @@
 use std::{
     net::SocketAddr,
+    net::TcpListener as StdTcpListener,
     path::{Path, PathBuf},
     sync::Arc,
 };
@@ -44,6 +45,17 @@ struct AppState {
     report: Option<Vec<u8>>,
 }
 
+pub fn ensure_port_available(port: u16) -> Result<()> {
+    StdTcpListener::bind(("127.0.0.1", port)).map_err(|err| match err.kind() {
+        std::io::ErrorKind::AddrInUse => anyhow!(
+            "Port {} is already in use. Re-run with --port <PORT> to choose a different port.",
+            port
+        ),
+        _ => err.into(),
+    })?;
+    Ok(())
+}
+
 /// Run the `kingfisher view` subcommand.
 pub async fn run(args: ViewArgs) -> Result<()> {
     let report = if let Some(report_bytes) = args.report_bytes.as_ref() {