Compile Latex Documents On Change

cltex.sh

#!/usr/bin/env sh
# vi: ft=sh
if ! (command -v lualatex >/dev/null 2>&1); then
    printf "CLTEX: %s\n" "Please install lualatex!"
    exit 1
fi

# Make sure the file exists
if ! [ -f "${1}" ]; then
    printf "CLTEX: %s\n" "Target file does not exist!"
    exit 1
else
    printf "CLTEX: %s\n" "Target file found - proceeding."
fi

# Pre-run cleaning step
# Remove any existing auxiliary files, if they already exist
#for file in ./*.{aux,log}; do
#    rm "${file}"
#done

# Start loop
last_change=""
current_change=""
while true; do
    # Stat file contents
    current_change="$(stat "${1}" | grep -oP '(?<=Change: )[0-9\.\-_:\s]+$')"
    # Do something if change gets detected
    if ! [ "${current_change}" = "${last_change}" ]; then
        # Compile Document
        lualatex --halt-on-error --shell-escape "${1}"
        lualatex --halt-on-error --shell-escape "${1}"

        # Remove all auxiliary files that were created when building
        #for file in ./*.{aux,idx,ilg,ind,log,toc}; do
        #    rm -v "${file}"
        #done
    fi
    # Update the last change
    last_change="${current_change}"
    # Wait one second before statting again
    sleep 1;
done