add option to suppress header ref #29662

framework/src/base/MooseApp.C

@@ -247,6 +247,10 @@ MooseApp::validParams()
       "Continue the calculation. Without <file base>, the most recent recovery file will be used");
   params.setGlobalCommandLineParam("recover");
 
+  params.addCommandLineParam<bool>(
+      "suppress_header", "--suppress-header", "Flag to print the App header");
+  params.setGlobalCommandLineParam("suppress_header");
+
   params.addCommandLineParam<bool>(
       "test_checkpoint_half_transient",
       "--test-checkpoint-half-transient",
@@ -730,7 +734,8 @@ MooseApp::setupOptions()
   TIME_SECTION("setupOptions", 5, "Setting Up Options");
 
   // Print the header, this is as early as possible
-  _console << header() << std::endl;
+  if (isParamValid("suppress_header") && !getParam<bool>("suppress_header"))
+    _console << header() << std::endl;
 
   if (getParam<bool>("error_unused"))
     setCheckUnusedFlag(true);

test/tests/multiapps/multilevel/tests

@@ -35,6 +35,14 @@
       expect_out = 'MOOSE Test App\n\nsub0: MOOSE Test App\nsub0: \nsub0_sub0: MOOSE Test App'
       detail = "and append the subapp number to the header"
     []
+    [suppress_subapp_header]
+      type = 'RunApp'
+      input = 'dt_from_parent_parent.i'
+      prereq = group/header_check
+      cli_args = 'MultiApps/sub/cli_args=--suppress-header'
+      expect_out = 'MOOSE Test App\n\nFramework Information:'
+      detail = "and suppress the subapp header."
+    []
   []
 
   [console_to_file]