face9000.bash

#!/bin/bash -
readonly argv0=aur
readonly lib_dir=${AUR_EXEC_PATH:-'AURUTILS_LIB_DIR'}
XDG_CONFIG_HOME=${XDG_CONFIG_HOME:-$HOME/.config}
config_file=$XDG_CONFIG_HOME/aurutils/aurutils.conf
shopt -s nullglob

usage() {
    printf >&2 'usage: %s [-K] [command]\n\n' "$argv0"
    printf >&2 'available commands:\n'

    for p in "$lib_dir"/aur-*; do
        printf '%q\n' "${p##*/aur-}"
    done | column >&2

    printf >&2 '\navailable user commands:\n'

    compgen -c aur- | sort -u | while IFS= read -r; do
        if ! [[ -f $lib_dir/$REPLY ]]; then
            printf '%q\n' "${REPLY#aur-}"
        fi
    done | column >&2

    exit 1
}

if [[ -z $1 ]]; then
    usage
fi

if [[ "$PATH" != "$lib_dir:"* ]]; then
    readonly PATH=$lib_dir:$PATH
fi

read_options() {
    #global options
    local key value

    while IFS='=' read -r key value; do
        if [[ $value ]]; then
            options+=("$key=$value")
        else
            options+=("$key")
        fi
    done < <(pacini --section="$2" "$1") 
}

options=()
case $1 in
    -K|--config) # XXX take configuration file as argument
        shift; 
        if [[ -z $1 ]]; then
            usage
        fi
        
        if [[ -f $config_file ]]; then
            case $1 in
                # aur-sync uses both aur-build and its own specific options
                sync)
                    if pacini "$config_file" --section-list | grep -q build; then
                        read_options "$config_file" build
                    fi

                    if pacini "$config_file" --section-list | grep -q sync; then
                        read_options "$config_file" sync
                    fi
                    ;;
                # options for other tools
                *)
                    if pacini "$config_file" --section-list | grep -q "$1"; then
                        read_options "$config_file" "$1"
                    fi
                    ;;
            esac
        else
            printf >&2 '%s: no such file or directory\n' "$config_file"
            exit 1
        fi 
        ;;
    *)
esac

if type -P "aur-$1" >/dev/null; then
    exec "aur-$1" "${options[@]}" "${@:2}"
else
    printf >&2 '%s: %q is not an aur command\n' "$argv0" "$1"
    exit 1
fi