#!/bin/sh

# A helper script for LaTeX/groff files used by `compiler` and `opout`.
# The user can add the root file of a larger project as a comment as below:
# % root = mainfile.tex
# And the compiler script will run on that instead of the opened file.

texroot="$(sed -n 's/^\s*%.*root\s*=\s*\(\S\+\).*/\1/p' "${1}")"
[ -f "${texroot}" ] && readlink -f "${texroot}" || exit "1"