latex-compile

#!/usr/bin/env bash

# Latex command template where %s is filename
LATEX_COMMAND="latexmk"
LATEX_ARGS="-f -shell-escape --synctex=1 --pdf"
LATEX_PIPE=""

flag_auto=''
flag_supress=''
flag_debug=''
watch_files=''
compile_count='1'
compile_files=''
latex_recipe='pdflatex' 	# unused
latex_extra_args=''		# unused

print_usage() {
    printf "latex-compile: Helper tool to autocompile latex files.\n"
    printf "\nUsage: latex-compile [-a|--auto] [-s|--supress]"
    printf " [-d|--debug] [-w|--watch <files>]"
    printf " [-r|--recipe <recipe>] [-c|--commands <args>]"
    printf " [-h|--help] [<files>]\n"
    
    printf "\nOptions:\n"
    printf "  [-a|--auto]\n"
    printf "    Automatically compile latex each time file is modified.\n"
    printf "  [-s|--supress]\n"
    printf "    Supress as much output as possible.\n"
    printf "  [-d|--debug]\n"
    printf "    Debug mode; print variables and exit.\n"
    printf "  [-w|--watch] <files>\n"
    printf "    Add more files to watch list which trigger auto compile.\n"
    printf "  [-r|--recipe] <recipe>\n"
    printf "    Recipe to use for compilation\n"
    printf "  [-c|--commands] <args>\n"
    printf "    Arguments to pass to latex compile program.\n"
    printf "  [-C|--clean]\n"
    printf "    Clean the extra files generated by pdflatex (keep .tex and .pdf).\n"
    printf "  [-h|--help]\n"
    printf "    Display this and exit.\n"
    printf "  [<files>]\n"
    printf "    Files to compile, defaults to all .tex in PWD.\n"
}


compile_(){
    for i in $(seq $compile_count); do
	for arg in $compile_files; do
	    printf "$LATEX_COMMAND $LATEX_ARGS $PWD/%s $LATEX_PIPE\n" "$arg"
	    $(printf "$LATEX_COMMAND $LATEX_ARGS $PWD/%s $LATEX_PIPE\n" "$arg")
	done
    done
}

TEMP=$(getopt -o 'asdt:w:r:c:Ch' --long 'auto,supress,debug,times:,watch:,recipe:,commands:,clean,help' -n 'latex-compile' -- "$@")

if [ $? -ne 0 ]; then
    echo 'Erro in parsing Arguments...' >&2
    print_usage
    exit 1
fi

eval set -- "$TEMP"
unset TEMP

while true; do
  case "$1" in
      '-a'|'--auto')
	  flag_auto='true'
	  shift
	  continue
	  ;;
      '-s'|'--supress')
	  flag_supress='true'
	  LATEX_ARGS="$LATEX_ARGS --interaction=batchmode"
	  LATEX_PIPE=" 2>&1 > /dev/null"
	  shift
	  continue
	  ;;
      '-d'|'--debug')
	  flag_debug='true'
	  shift
	  continue
	  ;;
      '-w'|'--watch')
	  watch_files="$PWD/$2 $watch_files"
	  shift 2
	  continue
	  ;;
      '-C'|'--clean')
	  rm $PWD/*.{aux,log,out}
	  exit 0
	  ;;
      '-r'|'--recipe')
	  recipe="$2"
	  shift 2
	  continue
	  ;;
      '-t'|'--times')
	  compile_count="$2"
	  shift 2
	  continue
	  ;;
      '-h'|'--help')
	  print_usage
	  shift
	  exit
	  ;;
      '--')
	  shift
	  break
	  ;;
      *) printf "Internal Error!\n"
	 exit 1
	 ;;
  esac
done

compile_files="$@"

# if none given defaults to all the tex files in PWD
if [[ -z $compile_files ]]; then
    compile_files="*.tex"
fi

# outputs for debug mode
if [[ -n $flag_debug ]]; then
    echo "---------Settings---------"
    printf "LaTeX Command = \t {%s}\n" "$LATEX_COMMAND"
    printf "LaTeX Args = \t {%s}\n" "$LATEX_ARGS"
    printf "LaTeX PIPE = \t {%s}\n" "$LATEX_PIPE"
    echo "------User Arguments------"
    printf "flag_auto = \t {%s}\n" "$flag_auto"
    printf "flag_supress = \t {%s}\n" "$flag_supress"
    printf "flag_debug = \t {%s}\n" "$watch_files"
    printf "recipe = \t {%s}\n" "$latex_recipe"
    printf "args = \t {%s}\n" "$latex_extra_args"
    printf "compile_count = \t {%s}\n" "$compile_count"
    echo "-----------Files----------"
    printf "watch_files: \n\t {%s}\n" "$watch_files"
    printf "compile_files: \n\t {%s}\n" "$compile_files"
    exit
fi

# just compile and exit if it's not in auto mode
if [[ -z $flag_auto ]]; then
    compile_
    exit
fi

for file in $compile_files; do
    watch_files="$watch_files $PWD/$file"
done


printf "Waiting for changes in the watch files.\n$watch_files\n"
# listen to events and compile when one of the files is modified
inotifywait -q -m -e modify $watch_files |
    while read -r filename event; do
	printf "Changes detected in: %s\n" "$filename"
	compile_
	printf "Waiting for changes in the watch files.\n$watch_files\n"
done