Add debug flag for system output

Signed-off-by: Aaron Lew <[email protected]>

Author: aaronlew02

tuf-cli/src/main/java/dev/sigstore/tuf/cli/TufConformanceServer.java

@@ -38,13 +38,17 @@
 public class TufConformanceServer {
 
   private static final Gson GSON = new Gson();
+  private static boolean debug = false;
 
   private static class ExecuteRequest {
     String[] args;
     String faketime;
   }
 
   public static void main(String[] args) throws Exception {
+    if (args.length > 0 && "--debug".equals(args[0])) {
+      debug = true;
+    }
     int port = 8080;
     Server server = new Server(port);
     server.setHandler(new TufConformanceHandler());
@@ -86,8 +90,10 @@ private static void handleExecute(HttpServletRequest request, HttpServletRespons
 
     try (PrintStream outPs = new PrintStream(outContent, true, StandardCharsets.UTF_8);
         PrintStream errPs = new PrintStream(errContent, true, StandardCharsets.UTF_8)) {
-      System.setOut(outPs);
-      System.setErr(errPs);
+      if (!debug) {
+        System.setOut(outPs);
+        System.setErr(errPs);
+      }
 
       Instant fakeNow = Instant.ofEpochSecond(Long.parseLong(executeRequest.faketime));
       TestClock.set(Clock.fixed(fakeNow, ZoneOffset.UTC));
@@ -114,8 +120,10 @@ private static void handleExecute(HttpServletRequest request, HttpServletRespons
         os.write(responseBytes);
       }
     } finally {
-      System.setOut(originalOut);
-      System.setErr(originalErr);
+      if (!debug) {
+        System.setOut(originalOut);
+        System.setErr(originalErr);
+      }
       TestClock.reset();
     }
   }