# bash completion for ugrep-indexer
# recommended: add the following lines to ~/.inputrc
# set colored-stats on
# set colored-completion-prefix on

if ! declare -F _init_completion >/dev/null 2>&1; then
    return
fi

_comp_cmd_ugrep_indexer()
{
    local IFS=$' \t\n'
    local cur prev words cword
    _init_completion -s || return

    if [[ $cword -eq 1 && "${words[1]}" == "" ]]; then
        _comp_cmd_ugrep_indexer_usage
        return
    fi

    local i
    for i in "${!words[@]}"; do
        if [ "${words[$i]}" = "--" ]; then
            if [ $cword -gt $i ]; then
                _filedir
                return
            fi
            words=( "${words[@]:0:$i}" )
            break
        fi
    done

    case $cur in
    --*)
        # complete long options by generating them
        COMPREPLY=( $(compgen -W "$(_parse_help _comp_cmd_ugrep_indexer_help)" -- $cur) )
        if [[ ! "${COMPREPLY[@]}" =~ "=" ]]; then
            # add space after long options that do not end with a =
            compopt +o nospace
        fi
        return
        ;;
    -?*)
        # add space after short option(s)
        COMPREPLY=( $cur )
        compopt +o nospace
        return
        ;;
    -)
        _comp_cmd_ugrep_indexer_usage
        return
        ;;
    esac

    _filedir
} &&
    complete -o nospace -F _comp_cmd_ugrep_indexer ugrep-indexer

_comp_cmd_ugrep_indexer_usage()
{
    local -a usage=()
    local line i=0
    case $COMP_TYPE in
    33|63|64)
        # generate list of options, concat the first sentence to them
        usage[0]="Usage:"
        while read -r line; do
            # truncate to screen width
            (( ++i ))
            usage[$i]=${line:0:$COLUMNS}
        done < <(_comp_cmd_ugrep_indexer_help)
        ;;
    37)
        # generate list of options
        while read -r line; do
            # keep initial option only, remove the rest
            usage[$i]=${line%%[[, ]*}
            (( ++i ))
        done < <(_comp_cmd_ugrep_indexer_help)
        ;;
    esac
    COMPREPLY=( "${usage[@]}" )
    compopt -o nosort
}

_comp_cmd_ugrep_indexer_help()
{
cat <<'END'
--accuracy=DIGIT, -0, -1, -2, -3, -4, -5, -6, -7, -8, -9 Specifies indexing accuracy.
-., --hidden Index hidden files and directories.
-?, --help Display a help message and exit.
-c, --check Recursively check and report indexes without reindexing files.
-d, --delete Recursively remove index files.
-f, --force Force reindexing of files.
-I, --ignore-binary Do not index binary files.
-q, --quiet, --silent Quiet mode: do not display indexing statistics.
-S, --dereference-files Follow symbolic links to files.
-s, --no-messages Silent mode: nonexistent and unreadable files are ignored, i.e. their error messages and warnings are suppressed.
-V, --version Display version and exit.
-v, --verbose Produce verbose output.
-X, --ignore-files, --ignore-files=FILE Do not index files and directories matching the globs in FILE encountered during indexing.
-z, --decompress Index the contents of compressed files and archives.
--zmax=NUM When used with option -z (--decompress), indexes the contents of compressed files and archives stored within archives by up to NUM expansion levels deep.
END
}