rake_completion

# Adapted from <http://willcode4beer.com/tips.jsp?set=tabMaven>
_rake()
{
  COMPREPLY=()
  local cur=${COMP_WORDS[COMP_CWORD]}
  local rake="$1"

  if [[ ${cur} == -* ]] ; then   # complete long options
    local opts='--classic-namespace --describe --dry-run --execute \
      --execute-print --execute-continue --libdir --prereqs --quiet --rakefile \
      --rakelibdir --rakelib --require --rules --no-search --nosearch --silent \
      --quiet --system --no-system --nosystem --tasks --trace --verbose \
      --version --help'
    COMPREPLY=($(compgen -W '$opts' -- $cur))
    return 0

  else                            # complete tasks
    # Work-around bash_completion issue where bash interprets a colon
    # as a separator.
    # Work-around borrowed from the darcs work-around for the same
    # issue.
    local colonprefixes=${cur%"${cur##*:}"}
    local tasks="$(rake -T | awk '/^rake / {print $2}')"
    COMPREPLY=($(compgen -W '$tasks' -- $cur))
    local i=${#COMPREPLY[*]}
    while [ $((--i)) -ge 0 ]; do
      COMPREPLY[$i]=${COMPREPLY[$i]#"$colonprefixes"}
    done

    return 0
  fi
} &&
complete -o bashdefault -o default -F _rake rake