scripts/library/parse_options.sh

   1 # getopt like parser
   2 parse_options() {
   3         local short_options=$1; shift;
   4         local long_options=$1; shift;
   5         local ret=0;
   6         local unused_options=""
   7         local i
   8
   9         while [[ -n $1 ]]; do
  10                 if [[ ${1:0:2} = '--' ]]; then
  11                         if [[ -n ${1:2} ]]; then
  12                                 local match=""
  13                                 for i in ${long_options//,/ }; do
  14                                         if [[ ${1:2} = ${i//:} ]]; then
  15                                                 match=$i
  16                                                 break
  17                                         fi
  18                                 done
  19                                 if [[ -n $match ]]; then
  20                                         local needsargument=0
  21
  22                                         [[ ${match} = ${1:2}: ]] && needsargument=1
  23                                         [[ ${match} = ${1:2}:: && -n $2 && ${2:0:1} != "-" ]] && needsargument=1
  24
  25                                         if (( ! needsargument )); then
  26                                                 printf ' %s' "$1"
  27                                         else
  28                                                 if [[ -n $2 ]]; then
  29                                                         printf ' %s ' "$1"
  30                                                         shift
  31                                                         printf "'%q" "$1"
  32                                                         while [[ -n $2 && ${2:0:1} != "-" ]]; do
  33                                                                 shift
  34                                                                 printf " %q" "$1"
  35                                                         done
  36                                                         printf "'"
  37                                                 else
  38                                                         printf "@SCRIPTNAME@: $(gettext "option %s requires an argument\n")" "'$1'" >&2
  39                                                         ret=1
  40                                                 fi
  41                                         fi
  42                                 else
  43                                         echo "@SCRIPTNAME@: $(gettext "unrecognized option") '$1'" >&2
  44                                         ret=1
  45                                 fi
  46                         else
  47                                 shift
  48                                 break
  49                         fi
  50                 elif [[ ${1:0:1} = '-' ]]; then
  51                         for ((i=1; i<${#1}; i++)); do
  52                                 if [[ $short_options =~ ${1:i:1} ]]; then
  53                                         local needsargument=0
  54
  55                                         [[ $short_options =~ ${1:i:1}: && ! $short_options =~ ${1:i:1}:: ]] && needsargument=1
  56                                         [[ $short_options =~ ${1:i:1}:: && \
  57                                                 ( -n ${1:$i+1} || ( -n $2 && ${2:0:1} != "-" ) ) ]] && needsargument=1
  58
  59                                         if (( ! needsargument )); then
  60                                                 printf ' -%s' "${1:i:1}"
  61                                         else
  62                                                 if [[ -n ${1:$i+1} ]]; then
  63                                                         printf ' -%s ' "${1:i:1}"
  64                                                         printf "'%q" "${1:$i+1}"
  65                                                         while [[ -n $2 && ${2:0:1} != "-" ]]; do
  66                                                                 shift
  67                                                                 printf " %q" "$1"
  68                                                         done
  69                                                         printf "'"
  70                                                 else
  71                                                         if [[ -n $2 ]]; then
  72                                                                 printf ' -%s ' "${1:i:1}"
  73                                                                 shift
  74                                                                 printf "'%q" "$1"
  75                                                                 while [[ -n $2 && ${2:0:1} != "-" ]]; do
  76                                                                         shift
  77                                                                         printf " %q" "$1"
  78                                                                 done
  79                                                                 printf "'"
  80
  81                                                         else
  82                                                                 printf "@SCRIPTNAME@: $(gettext "option %s requires an argument\n")" "'-${1:i:1}'" >&2
  83                                                                 ret=1
  84                                                         fi
  85                                                 fi
  86                                                 break
  87                                         fi
  88                                 else
  89                                         echo "@SCRIPTNAME@: $(gettext "unrecognized option") '-${1:i:1}'" >&2
  90                                         ret=1
  91                                 fi
  92                         done
  93                 else
  94                         unused_options="${unused_options} '$1'"
  95                 fi
  96                 shift
  97         done
  98
  99         printf " --"
 100         [[ $unused_options ]] && printf ' %s' "${unused_options[@]}"
 101         [[ $1 ]] && printf " '%s'" "$@"
 102         printf "\n"
 103
 104         return $ret
 105 }