Set TEXINPUTS in a system independent way

[FG-TUM]

Description

Problem

Prepending environment variables to commands works differently (if at all) on Windows. Sadly, you can't just do FOO=value myCommand. For this reason, the pdflatex alias command in latexmkrc does not work on Windows.

Fix

Use latexmk's ensure_path() function to be compatible with any operating system. See the official documentation (page 54).

Additional context

• We don't need to append ':' to the new value, since ensure_path() prepends this value to the existing one and fills in the system-appropriate path separators.
• Yes, I know there is a docker container, but if the tools we use are already system independent, why not employ them that way? :)

Tests

• executed make pdf-local on Windows successfully
• executed make pdf-local on Linux successfully