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-rw-r--r--scripts/library/README24
-rw-r--r--scripts/library/parse_options.sh105
-rw-r--r--scripts/library/parseopts.sh141
3 files changed, 160 insertions, 110 deletions
diff --git a/scripts/library/README b/scripts/library/README
index 1e9c962b..c71c0714 100644
--- a/scripts/library/README
+++ b/scripts/library/README
@@ -8,8 +8,22 @@ and can be silenced by defining 'QUIET'. The 'warning' and 'error'
functions print to stderr with the appropriate prefix added to the
message.
-parse_options.sh:
-A getopt replacement to avoids portability issues, in particular the
-lack of long option name support in the default getopt provided by some
-platforms.
-Usage: parse_option $SHORT_OPTS $LONG_OPTS "$@"
+parseopts.sh:
+A getopt_long-like parser which portably supports longopts and shortopts
+with some GNU extensions. It does not allow for options with optional
+arguments. For both short and long opts, options requiring an argument
+should be suffixed with a colon. After the first argument containing
+the short opts, any number of valid long opts may be be passed. The end
+of the options delimiter must then be added, followed by the user arguments
+to the calling program.
+
+Reccommended Usage:
+ OPT_SHORT='fb:z'
+ OPT_LONG=('foo' 'bar:' 'baz')
+ if ! parseopts "$OPT_SHORT" "${OPT_LONG[@]}" -- "$@"; then
+ exit 1
+ fi
+ set -- "${OPTRET[@]}"
+Returns:
+ 0: parse success
+ 1: parse failure (error message supplied)
diff --git a/scripts/library/parse_options.sh b/scripts/library/parse_options.sh
deleted file mode 100644
index 039eef92..00000000
--- a/scripts/library/parse_options.sh
+++ /dev/null
@@ -1,105 +0,0 @@
-# getopt like parser
-parse_options() {
- local short_options=$1; shift;
- local long_options=$1; shift;
- local ret=0;
- local unused_options=""
- local i
-
- while [[ -n $1 ]]; do
- if [[ ${1:0:2} = '--' ]]; then
- if [[ -n ${1:2} ]]; then
- local match=""
- for i in ${long_options//,/ }; do
- if [[ ${1:2} = ${i//:} ]]; then
- match=$i
- break
- fi
- done
- if [[ -n $match ]]; then
- local needsargument=0
-
- [[ ${match} = ${1:2}: ]] && needsargument=1
- [[ ${match} = ${1:2}:: && -n $2 && ${2:0:1} != "-" ]] && needsargument=1
-
- if (( ! needsargument )); then
- printf ' %s' "$1"
- else
- if [[ -n $2 ]]; then
- printf ' %s ' "$1"
- shift
- printf "'%q" "$1"
- while [[ -n $2 && ${2:0:1} != "-" ]]; do
- shift
- printf " %q" "$1"
- done
- printf "'"
- else
- printf "@SCRIPTNAME@: $(gettext "option %s requires an argument\n")" "'$1'" >&2
- ret=1
- fi
- fi
- else
- echo "@SCRIPTNAME@: $(gettext "unrecognized option") '$1'" >&2
- ret=1
- fi
- else
- shift
- break
- fi
- elif [[ ${1:0:1} = '-' ]]; then
- for ((i=1; i<${#1}; i++)); do
- if [[ $short_options =~ ${1:i:1} ]]; then
- local needsargument=0
-
- [[ $short_options =~ ${1:i:1}: && ! $short_options =~ ${1:i:1}:: ]] && needsargument=1
- [[ $short_options =~ ${1:i:1}:: && \
- ( -n ${1:$i+1} || ( -n $2 && ${2:0:1} != "-" ) ) ]] && needsargument=1
-
- if (( ! needsargument )); then
- printf ' -%s' "${1:i:1}"
- else
- if [[ -n ${1:$i+1} ]]; then
- printf ' -%s ' "${1:i:1}"
- printf "'%q" "${1:$i+1}"
- while [[ -n $2 && ${2:0:1} != "-" ]]; do
- shift
- printf " %q" "$1"
- done
- printf "'"
- else
- if [[ -n $2 ]]; then
- printf ' -%s ' "${1:i:1}"
- shift
- printf "'%q" "$1"
- while [[ -n $2 && ${2:0:1} != "-" ]]; do
- shift
- printf " %q" "$1"
- done
- printf "'"
-
- else
- printf "@SCRIPTNAME@: $(gettext "option %s requires an argument\n")" "'-${1:i:1}'" >&2
- ret=1
- fi
- fi
- break
- fi
- else
- echo "@SCRIPTNAME@: $(gettext "unrecognized option") '-${1:i:1}'" >&2
- ret=1
- fi
- done
- else
- unused_options="${unused_options} '$1'"
- fi
- shift
- done
-
- printf " --"
- [[ $unused_options ]] && printf ' %s' "${unused_options[@]}"
- [[ $1 ]] && printf " '%s'" "$@"
- printf "\n"
-
- return $ret
-}
diff --git a/scripts/library/parseopts.sh b/scripts/library/parseopts.sh
new file mode 100644
index 00000000..11589ce3
--- /dev/null
+++ b/scripts/library/parseopts.sh
@@ -0,0 +1,141 @@
+# getopt-like parser
+parseopts() {
+ local opt= optarg= i= shortopts=$1
+ local -a longopts=() unused_argv=()
+
+ shift
+ while [[ $1 && $1 != '--' ]]; do
+ longopts+=("$1")
+ shift
+ done
+ shift
+
+ longoptmatch() {
+ local o longmatch=()
+ for o in "${longopts[@]}"; do
+ if [[ ${o%:} = "$1" ]]; then
+ longmatch=("$o")
+ break
+ fi
+ [[ ${o%:} = "$1"* ]] && longmatch+=("$o")
+ done
+
+ case ${#longmatch[*]} in
+ 1)
+ # success, override with opt and return arg req (0 == none, 1 == required)
+ opt=${longmatch%:}
+ if [[ $longmatch = *: ]]; then
+ return 1
+ else
+ return 0
+ fi ;;
+ 0)
+ # fail, no match found
+ return 255 ;;
+ *)
+ # fail, ambiguous match
+ printf "@SCRIPTNAME@: $(gettext "option '%s' is ambiguous; possibilities:")" "--$1"
+ printf " '%s'" "${longmatch[@]%:}"
+ printf '\n'
+ return 254 ;;
+ esac >&2
+ }
+
+ while (( $# )); do
+ case $1 in
+ --) # explicit end of options
+ shift
+ break
+ ;;
+ -[!-]*) # short option
+ for (( i = 1; i < ${#1}; i++ )); do
+ opt=${1:i:1}
+
+ # option doesn't exist
+ if [[ $shortopts != *$opt* ]]; then
+ printf "@SCRIPTNAME@: $(gettext "invalid option") -- '%s'\n" "$opt" >&2
+ OPTRET=(--)
+ return 1
+ fi
+
+ OPTRET+=("-$opt")
+ # option requires optarg
+ if [[ $shortopts = *$opt:* ]]; then
+ # if we're not at the end of the option chunk, the rest is the optarg
+ if (( i < ${#1} - 1 )); then
+ OPTRET+=("${1:i+1}")
+ break
+ # if we're at the end, grab the the next positional, if it exists
+ elif (( i == ${#1} - 1 )) && [[ $2 ]]; then
+ OPTRET+=("$2")
+ shift
+ break
+ # parse failure
+ else
+ printf "@SCRIPTNAME@: $(gettext "option requires an argument") -- '%s'\n" "$opt" >&2
+ OPTRET=(--)
+ return 1
+ fi
+ fi
+ done
+ ;;
+ --?*=*|--?*) # long option
+ IFS='=' read -r opt optarg <<< "${1#--}"
+ longoptmatch "$opt"
+ case $? in
+ 0)
+ # parse failure
+ if [[ $optarg ]]; then
+ printf "@SCRIPTNAME@: $(gettext "option '%s' does not allow an argument")\n" "--$opt" >&2
+ OPTRET=(--)
+ return 1
+ # --longopt
+ else
+ OPTRET+=("--$opt")
+ shift
+ continue 2
+ fi
+ ;;
+ 1)
+ # --longopt=optarg
+ if [[ $optarg ]]; then
+ OPTRET+=("--$opt" "$optarg")
+ shift
+ # --longopt optarg
+ elif [[ $2 ]]; then
+ OPTRET+=("--$opt" "$2" )
+ shift 2
+ # parse failure
+ else
+ printf "@SCRIPTNAME@: $(gettext "option '%s' requires an argument")\n" "--$opt" >&2
+ OPTRET=(--)
+ return 1
+ fi
+ continue 2
+ ;;
+ 254)
+ # ambiguous option -- error was reported for us by longoptmatch()
+ OPTRET=(--)
+ return 1
+ ;;
+ 255)
+ # parse failure
+ printf "@SCRIPTNAME@: $(gettext "invalid option") '--%s'\n" "$opt" >&2
+ OPTRET=(--)
+ return 1
+ ;;
+ esac
+ ;;
+ *) # non-option arg encountered, add it as a parameter
+ unused_argv+=("$1")
+ ;;
+ esac
+ shift
+ done
+
+ # add end-of-opt terminator and any leftover positional parameters
+ OPTRET+=('--' "${unused_argv[@]}" "$@")
+ unset longoptmatch
+
+ return 0
+}
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