#! bash
# bash completion for the `gem` command.
#
# Copyright (c) 2008 Daniel Luz <dev at mernen dot com>.
# Distributed under the MIT license.
# http://mernen.com/projects/completion-ruby
#
# To use, source this file on bash:
# . completion-gem
__gem() {
local cmd=$1
local cur=$2
local prev=$3
COMPREPLY=()
local options="
-h --help -v --version -V --verbose --no-verbose -q --quiet
--config-file --backtrace --debug"
local gem_command
__gem_get_command
case $prev in
--config-file)
# leave COMPREPLY blank, let the default handle it
return;;
esac
local choices
case $gem_command in
"")
choices=$(__gem_available_commands);;
help)
choices="commands examples platforms $commands";;
uninstall | cleanup)
choices=$(__gem_installed_gems);;
esac
[[ $cur == -* ]] && choices=$options
COMPREPLY=($(compgen -W "$choices" -- "$cur"))
}
# Stores in $gem_command the name of the gem command currently in use.
# If no command is found, the variable is not set.
__gem_get_command() {
local i
for ((i=1; i < $COMP_CWORD; ++i)); do
local arg=${COMP_WORDS[$i]}
case $arg in
-h | --help | -v | --version)
# these two options are command-killers
gem_command=-
return;;
--config-file)
# skip argument
((++i));;
[^-]*)
gem_command=$arg
return;;
esac
done
}
# Outputs a list of installed gems, one per line.
__gem_installed_gems() {
"$cmd" list --local --no-details | awk '/^[^ ]+ \(/ { print $1 }'
}
# Outputs a list of available commands, one per line.
__gem_available_commands() {
"$cmd" help commands | awk '/^ [^ ]/ { print $1 }'
}
complete -F __gem -o default gem gem1.8 gem1.9 jgem
# vim: ai ft=sh sw=2 sts=2 et
