gabs-build-chroot

#!/bin/zsh -x

# Find and load script config
local SCRIPTS_DIR="${0:A:h}"
[[ ! -d "${SCRIPTS_DIR}" ]] && exit 1

source "${SCRIPTS_DIR}/gabs-build-common" || exit $?

local CHROOT_MOUNT=
local CHROOT_FILE=
local EPHEMERAL_DIR=
local CHROOT_NAME=
local CLEANUP=false
local SETUP=false
local REMAKE_CHROOT=false
local LOOP_DEVICE_SIZE=50G

while [[ $# -gt 0 ]]; do
	case "${1}" in
        -ed) EPHEMERAL_DIR="${2}"; shift;;
		-cn) CHROOT_NAME="${2}"; shift;;
		-cm) CHROOT_MOUNT="${2}"; shift;;
		-cf) CHROOT_FILE="${2}"; shift;;
        -c) CLEANUP=true;;
        -s) SETUP=true;;
        -rm) REMAKE_CHROOT=true;;
        -lds) LOOP_DEVICE_SIZE="${2}"; shift;;
        --help)
            >&2 echo "Please refer to the man page."
            exit
        ;;
        *) # unknown option
			>&2 echo "Unkown option \"${1}\""
            exit 1
        ;;
    esac
    shift
done

if [[ "${CHROOT_NAME}" == "" ]]; then
    CHROOT_NAME="chroot"
    print_fallback_param "CHROOT_NAME" "${CHROOT_NAME}"
fi

if [[ "${EPHEMERAL_DIR}" != "" ]]; then
    if [[ "${CHROOT_FILE}" == "" ]]; then
        CHROOT_FILE="${EPHEMERAL_DIR}/chroots/${CHROOT_NAME}.img"
        print_fallback_param "CHROOT_FILE" "${CHROOT_FILE}"
    fi

    if [[ "${SETUP}" == "true" ]]; then
        if [[ "${CHROOT_MOUNT}" == "" ]]; then
            CHROOT_MOUNT="${EPHEMERAL_DIR}/chroots/${CHROOT_NAME}"
            print_fallback_param "CHROOT_MOUNT" "${CHROOT_MOUNT}"
        fi
        error_blank_param CHROOT_MOUNT
    fi
fi

[[ "${REMAKE_CHROOT}" == false ]] \
    && error_blank_nondir_param -f CHROOT_FILE \
    || error_blank_param CHROOT_FILE

[[ "${CLEANUP}" == "true" ]] && cleanup_loopdevice

if [[ "${SETUP}" == "true" ]]; then
    local LOOP_DEVICE="$(losetup -f)"
    UNMOUNT_LOOP_DEVICE=false
    setup_loopdevice || exit $?
    echo "${LOOP_DEVICE}"
fi