auto_complete.sh

#! /bin/bash

SOURCES_FILE="sources.txt"

pushd . > /dev/null 2>&1

function setScriptDir {
    if [[ x"${MARS_SCRIPT_DIR}" == "x" ]]; then
        MARS_SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
    fi
    export MARS_SCRIPT_DIR=${MARS_SCRIPT_DIR}
}

setScriptDir

function parse_yaml {
   local s='[[:space:]]*' w='[a-zA-Z0-9_-]*' fs=$(echo @|tr @ '\034')
   sed -ne "/.:./d" \
        -e "/#/d" \
        -e "s|^\($s\)\($w\)$s:$s\(.*\)$s\$|\2|p" $1
}

packages1="bootstrap install rebuild clean fetch update diff"
packages=""
while read source_file; do
    source_file=${source_file/\#*/}
    if [[ x${source_file} = x ]]; then
        continue
    fi
    p=$(parse_yaml "${MARS_SCRIPT_DIR}/${source_file}")
    IFS='
'
    set -f
    for line in ${p}; do
	if [[ x${packages} != x ]]; then
	    packages+=" "
	fi
	packages+=${line}
    done
    set +f
    unset IFS
done < ${MARS_SCRIPT_DIR}/${SOURCES_FILE}

txt_files=$(ls ${MARS_SCRIPT_DIR} | grep ".txt")
IFS='
'
set -f
for line in ${txt_files}; do
	  if [[ x${packages} != x ]]; then
	      packages+=" "
	  fi
	  packages+=${line}
done
set +f
unset IFS

# use the bash-builtin to provide basic package-completions.
#
# note that zsh for example does not know this commend.
if [ -n "$BASH_VERSION" ]; then
    complete -o default -W "${packages1} ${packages}" mars.sh
    complete -o default -W "${packages}" mars_install
    complete -o default -W "${packages}" mars_bootstrap
    complete -o default -W "${packages}" mars_rebuild
    complete -o default -W "${packages}" mars_diff
fi

popd > /dev/null 2>&1