LuaLaTeX font fallback configuration

Question

I am currently creating a LaTeX class that my students can use for their theses. For this, I would like to use fonts that I personally find very appealing. Unfortunately, I have installed several fonts on my system over the past few months and now I am unsure which ones are included by default in LaTeX distributions.

Does anyone know which of the fonts listed below need to be installed manually?

Additionally, I would be interested to know if there is a suitable combination to my standard set "XCharter, Fira Sans, DejaVu Sans Mono" that is included by default.

Here is my MWE:

\documentclass[margin=1cm,varwidth]{standalone}

\usepackage{fontspec}

% Main font with fallback options
\IfFontExistsTF{XCharter}{
  \setmainfont{XCharter}
}{
  \IfFontExistsTF{QTPalatine}{
    \setmainfont{QTPalatine}
  }{
    \setmainfont{Latin Modern Roman}
  }
}

% Sans font with fallback options
\IfFontExistsTF{Fira Sans}{
  \setsansfont{Fira Sans}
}{
  \IfFontExistsTF{Lato}{
    \setsansfont{Lato}
  }{
    \setsansfont{Latin Modern Sans}
  }
}

% Mono font with fallback options
\IfFontExistsTF{DejaVu Sans Mono}{
  \setmonofont{DejaVu Sans Mono}[Scale=0.9]
}{
  \IfFontExistsTF{JetBrains Mono}{
    \setmonofont{JetBrains Mono}
  }{
    \IfFontExistsTF{Inconsolata}{
      \setmonofont{Inconsolata}
    }{
      \setmonofont{Latin Modern Mono}
    }
  }
}

\begin{document}

The quick brown fox jumps over the lazy dog

\textsf{The quick brown fox jumps over the lazy dog}

\texttt{The quick brown fox jumps over the lazy dog}

\end{document}

Answer 1

Thanks to @cfr I was able to figure it out for my current TEXLive 2024 installation on Mac OS X and finally came up with this solution:

\documentclass[margin=1cm,varwidth]{standalone}

\usepackage{fontspec}

% Main font with fallback options
\IfFontExistsTF{XCharter}{
  \setmainfont{XCharter}                        % part of TEX Live
}{
  \IfFontExistsTF{QTPalatine}{
    \setmainfont{QTPalatine}                    % part of TEX Live
  }{
    \IfFontExistsTF{Noto Serif}{
      \setmainfont{Noto Serif}                  % part of TEX Live
    }{
      \setmainfont{TeX Gyre Pagella}            % part of TEX Live
    }
  }
}

% Sans font with fallback options
\IfFontExistsTF{Fira Sans}{
  \setsansfont{Fira Sans}                       % Not part of TEX Live
}{
  \IfFontExistsTF{Lato}{
    \setsansfont{Lato}                          % Not part of TEX Live
  }{
    \IfFontExistsTF{Noto Sans}{
      \setsansfont{Noto Sans}[Scale=0.95]       % part of TEX Live
    }{
      \setsansfont{TeX Gyre Heros}[Scale=0.9]   % part of TEX Live
    }
  }
}

% Mono font with fallback options
\IfFontExistsTF{DejaVu Sans Mono}{
  \setmonofont{DejaVu Sans Mono}[Scale=0.9]     % Not part of TEX Live
}{
  \IfFontExistsTF{JetBrains Mono}{
    \setmonofont{JetBrains Mono}                % Not part of TEX Live
  }{
    \IfFontExistsTF{Inconsolata}{
      \setmonofont{Inconsolata}                 % Not part of TEX Live
    }{
      \setmonofont{AnonymousPro}                % part of TEX Live
    }
  }
}

\begin{document}

The quick brown fox jumps over the lazy dog

\textsf{The quick brown fox jumps over the lazy dog}

\texttt{The quick brown fox jumps over the lazy dog}

\texttt{\itshape The quick brown fox jumps over the lazy dog}

\end{document}