Only compile necessary frontmatter/backmatter additions (e.g., bib) for single subfiles

preamble.tex

@@ -166,7 +166,8 @@
     pdfcreator={LuaLaTeX}
   }
 
-  % Starting pages
+  % Only compile title/glossaries/toc with the main document
+  \ifSubfilesClassLoaded{}{%
     \pagestyle{empty}
     \pagenumbering{gobble}
     \input{titlepage}
@@ -186,6 +187,7 @@
     \cleardoublepage%
     \printglossary%
     \cleardoublepage%
+  }
 
   \mainmatter%
   \pagestyle{headings}
@@ -205,6 +207,8 @@
   % \printbibliography%
   \cleardoublepage%
 
+  % Only compile lists/declaration with the main document
+  \ifSubfilesClassLoaded{}{%
     \phantomsection%
     \addcontentsline{toc}{chapter}{Lists}
 
@@ -228,6 +232,7 @@
     \addcontentsline{toc}{chapter}{Statutory Declaration}
     \includepdf[pages=-]{declaration_signed.pdf}
   }
+}
 
 % Colors
 \definecolor{tuCorporateGreen}{HTML}{639A00}