\NeedsTeXFormat{LaTeX2e}[2021/11/15]
\ProvidesPackage{example}

\RequirePackage{etoolbox}

% Options {{{1

\DeclareOption{biblatex}{\booltrue{biblatex}}
\DeclareOption{doublespaced}{\booltrue{doublespaced}}

\newbool{biblatex}
\newbool{doublespaced}

\ProcessOptions\relax

% Packages {{{1

\RequirePackage{fontspec}
\RequirePackage[
  shorthands=off,
  latin,
  english.american,
]{babel}
\RequirePackage[babel]{microtype}
\RequirePackage[
  strict,
  autostyle,
  latin=britishquotes,
]{csquotes}
\RequirePackage{geometry}
\AddToHook{begindocument/before}{\RequirePackage{hyperref}}

% biblatex {{{2
\ifbool{biblatex}{
  \RequirePackage[
    authordate,
    autolang=hyphen,
    pagetracker=false,
    doi=false,
    isbn=false,
    url=false,
    dashed=false,
    compresspages=true,
    formatbib=minwo,
  ]{biblatex-chicago}
  \addbibresource{my_library.bib}
}{}
% }}}2

% Layout {{{1

% Paragraph {{{2
\clubpenalty=10000
\widowpenalty=10000
\babelprovide[hyphenrules=classiclatin]{latin}
\hyphenation{Prem-ise Prem-ises}

% Document {{{2
\setmainfont{Brill}
\geometry{hscale=0.64}

\ifbool{doublespaced}{% {{{3
  \RequirePackage{setspace}
  \doublespacing
  \ifbool{biblatex{\setlength{\bibitemsep}{0pt}}}{}
}{}
% }}}3
% }}}2

% }}}1