use _console for app header

[tophmatthews]

Motivation

When running multiapps, a nice color indentation appears for outputs from the sub apps that looks like:

Time Step 0, time = 0

Time Step 1, time = 0.25, dt = 0.25
sub0: 
sub0: Time Step 1, time = 0.25, dt = 0.25
sub0_sub0: 
sub0_sub0: Time Step 1, time = 0.25, dt = 0.25

Some subapps have headers defined in SomeApp::header() const. The current implementation of the header call in MooseApp::setupOptions() gets close by coloring the header and adding :, but misses out on the subapp:

// Print the header, this is as early as possible
  auto hdr = header();
  if (hdr.length() != 0)
  {
    if (multiAppLevel() > 0)
      MooseUtils::indentMessage(_name, hdr);
    Moose::out << hdr << std::endl;
  }

Sometimes there are things in that header that are worth seeing for each sub app instance, so having sub0: output before the header would be nice.

Even other times, it would be nice to suppress it all together.

Design

Change the header output to simply

// Print the header, this is as early as possible
  _console << header() << std::endl;

Second, use command line options to provide a flag to suppress output altogether.

Impact

More consistant multiapps.

[pbehne]

The current implementation of the header call in MooseApp::setupOptions() gets close by coloring the header and adding :, but misses out on the subapp:

Sometimes there are things in that header that are worth seeing for each sub app instance, so having sub0: output before the header would be nice.

I don't fully understand these statements. Could you please elaborate?

[tophmatthews]

Sure. It's basically this:

sub009: Centipede version:  git commit da4a829 on 2024-12-17
sub009: Units:              nanometer, second, kelvin, eV
sub009: Command line:       some_value=2.9276796160740592
sub009: 
sub009: The following total 20 aux variables:

vs this:

: Centipede version:  git commit da4a829 on 2024-12-17
: Units:              nanometer, second, kelvin, eV
: Command line:       some_value=2.9276796160740592
: 
: The following total 20 aux variables:

[tophmatthews]

Since some_value might be different depending on which app, I would like to be able to correlate header to subapp number.