_pdflatex

#!/bin/bash

LOG_DIR=".log"

# export PDF_COMPILER="lualatex"
[ -z "$PDF_COMPILER" ] && PDF_COMPILER="pdflatex"
SINK=''

# unset PDF_FILENAME
CLEAN=false

build() {
    TEXFILE="$1"

    job_name="$(echo "$TEXFILE" | sed 's,\.[^.]*,,')"
    # job_name="${texfile%.tex}"
    
    echo $PDF_COMPILER

    # Option: -interaction=nonstopmode

	  mkdir -p "$LOG_DIR"
    case "$PDF_COMPILER" in
        lualatex) lualatex -output-directory="$LOG_DIR" \
             "$TEXFILE" $SINK || return;;
        pdflatex) pdflatex -output-directory="$LOG_DIR" \
             "$TEXFILE" $SINK || return;;
    esac;
        
    [ -z "$PDF_FILENAME" ] && PDF_FILENAME="$job_name.pdf"
    [ -f "$LOG_DIR/$job_name.pdf" ] && \
	      mv "$LOG_DIR/$job_name.pdf" "$PDF_FILENAME"
}

main () {
    mkdir -p "$LOG_DIR"

    echo $1
    $CLEAN && {
        rm -r "$LOG_DIR"
        exit 0;
    }

    [ -z "$1" ] && {
        echo "Not enough arguments! Expects $0 'texfile'"
        exit 1
    }

    # $WATCH && { 
    #     Check: https://superuser.com/questions/181517/how-to-execute-a-command-whenever-a-file-changes#181543
    #     watchexec -e md make build "$1";
    #     exit 0;
    # }

    build "$1"
}

_usage() {
    printf "Usage: $0 [-sc] <texfile> \n\t OPTIONS:\n"
    printf "\t\t :  \topens the pdf file with 'gio open'.\n"
    printf "\t\t -s, --silent: \tcompiles with minimal output.\n"
    printf "\t\t -c, --clean:  \tremoves compile files.\n"
    printf "\t\t -o, --output: \toutput filename\n"
    # printf "\t\t watch: \trecomplies when file is changed.\n"
}

# Read arguments
POSITIONAL=()
while [[ $# -gt 0 ]]; do
case $1 in
    --print|-p)  PRINT=true ;;
    -h|--help)   _usage; exit 2 ;;
    -c|--clean)  CLEAN=true ;;
    -s|--silent) SINK="> /dev/null" ;;
    -o|--output) PDF_FILENAME="$2"; shift ;;
    --compiler)  PDF_COMPILER="$2"; shift ;;
    -*) echo "Invalid option '$1'" > /dev/stderr; exit 1 ;;
    *) POSITIONAL+=("$1") ;;
esac; shift;
done
main "${POSITIONAL[@]}"