#!/bin/sh
set -o pipefail

fail=0

for file in *.tex *.cls; do
	basename="$(basename -- "$file")"
	filefail=0

	(grep -n $'\t' "$file" | sed 's/\t/↹/g') && echo -e "$file: Found tab (expected only spaces)\n" && filefail=1
	(grep -n '\s$' "$file" | sed 's/\s/·/g') && echo -e "$file: Trailing whitespace\n" && filefail=1
	[ "${basename##*.}" = "tex" ] && (grep -nE '^ [^&]*\\\\' "$file") && echo -e "$file: Forced linebreak outside of table\n" && filefail=1
	[[ -x "$file" ]] && echo -e "$file: Executable bit is set (but filetype does not need to be executable)\n" && filefail=1

	if [ "$filefail" = "1" ]; then
		fail=1
		echo # additional newline after each failed file
	fi
done

if [ "$CI" = "true" ]; then
	pdfs=$(find . -iname "*.pdf" -not -path "./attachments/*")
	[ -n "$pdfs" ] && echo -e "Found PDF files not in ./attachments/:\n$pdfs" && fail=1
fi

if [ "$fail" = "1" ]; then
	exit 1
else
	echo "Linting passed"
fi