mirror of https://github.com/dyne/zuper.git
sub/command optarg parser refurbished from Tomb
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Jaromil
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f0417a1c03
commit
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150
zuper
150
zuper
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@ -704,6 +704,7 @@ EOF
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func "$_num key/values stored in $_path"
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}
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# }}} Key/Value filesave
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# {{{ Get/Set REST API
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@ -845,6 +846,155 @@ EOF
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# }}} Get/Set REST API
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# {{{ Parse commandline options
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# for example usage, see Tomb http://tomb.dyne.org
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vars+=(subcommand)
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arrs+=(option_main option_params)
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maps+=(option option_subcommands)
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# Hi, dear developer! Are you trying to add a new subcommand, or
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# to add some options? Well, keep in mind that option names are
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# global: they cannot bear a different meaning or behaviour across
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# subcommands. The only exception is "-o" which means: "options
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# passed to the local subcommand", and thus can bear a different
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# meaning for different subcommands.
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#
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# For example, "-s" means "size" and accepts one argument. If you
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# are tempted to add an alternate option "-s" (e.g., to mean
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# "silent", and that doesn't accept any argument) DON'T DO IT!
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#
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# There are two reasons for that:
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# I. Usability; users expect that "-s" is "size"
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# II. Option parsing WILL EXPLODE if you do this kind of bad
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# things (it will complain: "option defined more than once")
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#
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# If you want to use the same option in multiple commands then you
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# can only use the non-abbreviated long-option version like:
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# -force and NOT -f
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option.is_set() {
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# Check whether a commandline option is set.
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#
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# Synopsis: option_is_set -flag [out]
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#
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# First argument is the commandline flag (e.g., "-s").
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# If the second argument is present and set to 'out', print out the
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# result: either 'set' or 'unset' (useful for if conditions).
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#
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# Return 0 if is set, 1 otherwise
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local -i r # the return code (0 = set, 1 = unset)
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[[ -n ${(k)option[$1]} ]];
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r=$?
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[[ $2 == "out" ]] && {
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[[ $r == 0 ]] && { print 'set' } || { print 'unset' }
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}
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return $r;
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}
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# Print the option value matching the given flag
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# Unique argument is the commandline flag (e.g., "-s").
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option.value() {
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print -n - "${option[$1]}"
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}
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option.parse() {
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### Detect subcommand
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local -aU every_opts #every_opts behave like a set; that is, an array with unique elements
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for optspec in ${option_subcommands}${option_main}; do
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for opt in ${=optspec}; do
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every_opts+=${opt}
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done
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done
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local -a oldstar
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oldstar=("${(@)argv}")
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#### detect early: useful for --option-parsing
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zparseopts -M -D -Adiscardme ${every_opts}
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if [[ -n ${(k)discardme[--option-parsing]} ]]; then
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print $1
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if [[ -n "$1" ]]; then
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return 1
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fi
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return 0
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fi
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unset discardme
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if ! zparseopts -M -E -D -Adiscardme ${every_opts}; then
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_failure "Error parsing."
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return 127
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fi
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unset discardme
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subcommand=${1}
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if [[ -z $subcommand ]]; then
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subcommand="__default"
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fi
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if [[ -z ${(k)option_subcommands[$subcommand]} ]]; then
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_warning "There's no such command \"::1 subcommand::\"." $subcommand
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exitv=127 _failure "Please try -h for help."
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fi
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argv=("${(@)oldstar}")
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unset oldstar
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### Parsing global + command-specific options
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# zsh magic: ${=string} will split to multiple arguments when spaces occur
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set -A cmd_opts ${option_main} ${=option_subcommands[$subcommand]}
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# if there is no option, we don't need parsing
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if [[ -n $cmd_opts ]]; then
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zparseopts -M -E -D -Aoption ${cmd_opts}
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if [[ $? != 0 ]]; then
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_warning "Some error occurred during option processing."
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exitv=127 _failure "See \"sdk help\" for more info."
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fi
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fi
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#build option_params (array of arguments) and check if there are unrecognized options
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ok=0
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option_params=()
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for arg in $*; do
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if [[ $arg == '--' || $arg == '-' ]]; then
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ok=1
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continue #it shouldn't be appended to option_params
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elif [[ $arg[1] == '-' ]]; then
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if [[ $ok == 0 ]]; then
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exitv=127 _failure "Unrecognized option ::1 arg:: for subcommand ::2 subcommand::" $arg $subcommand
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fi
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fi
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option_params+=$arg
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done
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# First parameter actually is the subcommand: delete it and shift
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[[ $subcommand != '__default' ]] && { option_params[1]=(); shift }
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### End parsing command-specific options
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[[ "$option_params" == "" ]] && {
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func "sdk command: ::1 subcommand::" $subcommand
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} || {
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func "sdk command: ::1 subcommand:: ::2 param::" $subcommand $option_params
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}
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}
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# Later: process subcommand
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# case "$subcommand" in
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# help)
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# print "TODO: help"
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# ;;
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# __default)
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# zdump
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# ;;
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# # Reject unknown command and suggest help
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# *)
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# _warning "Command \"::1 subcommand::\" not recognized." $subcommand
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# _message "Try -h for help."
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# return 1
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# ;;
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# esac
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# }}}
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# {{{ Helpers
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function helper.isfound isfound() {
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