Add script for automatic solution building with latexmk.

.gitignore

@@ -0,0 +1,12 @@
+*.aux
+*.bbl
+*.bcf
+*.blg
+*.fdb_latexmk
+*.fls
+*.log
+*.out
+*.pdf
+*.run.xml
+*.toc
+*-solution.tex

.latexmkrc

@@ -0,0 +1,4 @@
+$pdf_mode = 1;
+$pdflatex = 'pdflatex -synctex=1 -file-line-error -interaction=nonstopmode -halt-on-error %O %S';
+$bibtex_use = 2;
+@generated_exts = (@generated_exts, 'bbl', 'run.xml', 'synctex.gz');

acAssignment.cls

@@ -782,4 +782,4 @@
             \clearpage%
             \addtocounter{page}{-1}%
             \thispagestyle{acBlankPage}%
-            \textit{\@acLocBlankPages}}}}
+            \textit{\@acLocBlankPages}}}}

example-assignment-english.tex

@@ -20,7 +20,7 @@
 % Enable warnings about problematic code
 \RequirePackage[l2tabu, orthodox]{nag}
 
-\documentclass[solution]{acAssignment}
+\documentclass{acAssignment}
 
 % Parse this file as UTF-8 (included in LaTeX by default since 2018 but included
 % here for backwards-compatibility). If you use something else, change this.
@@ -371,4 +371,4 @@ \section{First-order Basics}
         \end{acSolution}
 \end{enumerate}
 
-\end{document}
+\end{document}

example-assignment-german.tex

@@ -19,7 +19,7 @@
 % Enable warnings about problematic code
 \RequirePackage[l2tabu, orthodox]{nag}
 
-\documentclass[german, solution]{acAssignment}
+\documentclass[german]{acAssignment}
 
 \acCourse[https://west.uni-koblenz.de/studying/ws1920/algorithmen-und-datenstrukturen]
     {Algorithmen und Datenstrukturen}
@@ -448,4 +448,4 @@ \section{Hinweise zur Abgabe}
         Um nun eine Testklasse auszuführen, Rechtsklick auf die entprechende \texttt{.java}-Datei und erst \texttt{Run As} und dann \texttt{JUnit Test} auswählen.
 \end{itemize}
 
-\end{document}
+\end{document}

example-bibliography.bib

@@ -39,4 +39,4 @@ @book{DBLP:books/lib/MittelbachGB04
   publisher = {Addison-Wesley},
   year      = {2004},
   url       = {https://www.worldcat.org/oclc/53972111},
-}
+}

example-exam-english.tex

@@ -20,7 +20,7 @@
 % Enable warnings about problematic code
 \RequirePackage[l2tabu, orthodox]{nag}
 
-\documentclass[exam, sectionseven, solution]{acAssignment}
+\documentclass[exam, sectionseven]{acAssignment}
 
 % Parse this file as UTF-8 (included in LaTeX by default since 2018 but included
 % here for backwards-compatibility). If you use something else, change this.
@@ -393,4 +393,4 @@ \section{PageRank}
 
 \acBlankPages{3}
 
-\end{document}
+\end{document}

example-exam-german.tex

@@ -147,4 +147,4 @@ \subsection{Einfügen}
 
 \acBlankPages{3}
 
-\end{document}
+\end{document}

latexmk-solutions.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+
+from pathlib import Path
+import re
+import subprocess
+
+PATTERN = re.compile(
+    r"^\\documentclass\[?([^\]]*)\]?\{acAssignment\}", re.MULTILINE)
+
+for tex_file in Path(".").iterdir():
+    if (
+        not tex_file.name.endswith(".tex") or
+        tex_file.name == "acAssignment.tex"
+    ):
+        continue
+
+    tex_file_solution = (
+        tex_file.parent / (tex_file.name.replace(".tex", "-solution.tex"))
+    )
+
+    contents = tex_file.read_text(encoding="UTF-8")
+    match = PATTERN.search(contents)
+    if not match:
+        continue
+
+    options = [
+        option.strip()
+        for option in match.group(1).split(",")
+        if option.strip()
+    ]
+    options.append("solution")
+    options_str = ", ".join(options)
+
+    contents_solution = PATTERN.sub(
+        rf"\\documentclass[{options_str}]{{acAssignment}}", contents
+    )
+    tex_file_solution.write_text(contents_solution, encoding="UTF-8")
+
+subprocess.call(["latexmk"])