jsbookmarklet – Minify JavaScript file as browser bookmarklet

jsbookmarklet

#!/bin/sh
#
# jsbookmarklet
# 
# remi@remino.net
# 2018-04-19
#
# Minify JavaScript file using uglify then save it to a file,
# output it to the screen, or copy the output to clipboard (macOS only),
# for usage as a browser bookmarklet.
#
# No guarantees. Public domain.

jsbookmarklet_main() {
  [ $# -lt 1 ] && jsbookmarklet_usage && return 1
  OPTIND=
  DEFAULT_ECHO=1

  while getopts "cehs" OPTION
  do
    case "$OPTION" in
      c) COPY=1 && DEFAULT_ECHO=0 ;;
      e) ECHO=1 ;;
      h) jsbookmarklet_usage ;;
      s) SAVE=1 && DEFAULT_ECHO=0 ;;
    esac
  done

  shift `expr $OPTIND - 1`

  INPUT="$1"
  OUTPUT="$2"

  _true "$DEFAULT_ECHO" && _false "$ECHO" && ECHO=1
  [ "$OUTPUT" == "-" ] && OUTPUT="" && ECHO=1
  [ -z "$OUTPUT" ] && OUTPUT="` basename "$INPUT" .js `.build.js"

  [ ! -f "$INPUT" ] && _error "Cannot find file: $INPUT" && return 2

  code="javascript:` uglifyjs -cm -- "$INPUT" `"

  _true "$ECHO" && echo "$code"
  _true "$SAVE" && echo "$code" > "$OUTPUT"
  _true "$COPY" && echo "$code" | pbcopy
}

jsbookmarklet_usage() {
  echo "Usage: ` basename "$0" ` [-ces] input.js [output.js]"
  echo
  echo "Minify JavaScript file using uglify then save it to a file,"
  echo "output it to the screen, or copy the output to clipboard (macOS only)."
  echo "for usage as a browser bookmarklet."
  echo
  echo "  -c    Copy output to clipboard."
  echo "  -e    Echo output. (Default)"
  echo "  -h    This help screen."
  echo "  -s    Save output to file."
  echo
}

_error() {
  echo $@ 1>&2
}

_false() {
  [ -z "$1" ] || [ "$1" == "0" ]
}

_true() {
  [ "$1" == "1" ]
}

jsbookmarklet_main $@