1# 2# Originally from: 3# 4#Message-ID: <3B13EC65.179451AE@wanadoo.fr> 5#Date: Tue, 29 May 2001 20:37:25 +0200 6#From: Manu Rouat <emmanuel.rouat@wanadoo.fr> 7#Subject: [bash] Universal command options completion? 8# 9# 10#In the recent versions of bash (after 2.04) programmable 11#completion is available. A useful completion function 12#is , for a particular command, to enumerate all flags 13#that can be used in the command. Now, most GNU unix 14#commands have so-called 'long options' for example: 15# 16#ls --color=always --no-group --size 17# 18#and these are all listed when you issue a '--help' flag. 19#So the idea is to use that, then parse the output of the 20#'--help' and reinject this to compgen. The basis of the 21#following 'universal' completion funtion was the _configure_func' 22#written by Ian McDonnald (or is it Chet Ramey ?) 23#A dedicated function will always be better, but this is quite 24#convenient. I chose to use 'long options' because they are 25#easy to parse and explicit too (it's the point I guess...) 26#Lots of room for improvement ! 27 28_longopt_func () 29{ 30 case "$2" in 31 -*) ;; 32 *) return ;; 33 esac 34 35 case "$1" in 36 \~*) eval cmd=$1 ;; 37 *) cmd="$1" ;; 38 esac 39 COMPREPLY=( $("$cmd" --help | sed -e '/--/!d' -e 's/.*--\([^ ]*\).*/--\1/'| \ 40grep ^"$2" |sort -u) ) 41} 42 43complete -o default -F _longopt_func ldd wget bash id info # some examples that work 44