CAN_BIND=${CAN_BIND:-1}

# Bind a directory or copy it on error
#
# usage: ynh_bind_or_cp srcdir destdir as_root
# | arg: srcdir - directory to bind or copy
# | arg: destdir - mountpoint or destination directory
# | arg: as_root - 1 to execute commands as root
ynh_bind_or_cp() {
    local SRCDIR=$1
    local DESTDIR=$2
    local SUDO_CMD=
    [[ "${3}" = "1" ]] && SUDO_CMD="sudo"

    [[ ! -f "${DESTDIR}" ]] || {
        echo "Destination directory '${DESTDIR}' already exists" >&2
        return 1
    }

    # attempt to bind mounting the directory
    if [[ "${CAN_BIND}" = "1" ]]; then
        eval $SUDO_CMD mkdir -p "${DESTDIR}"

        if sudo mount --rbind "${SRCDIR}" "${DESTDIR}"; then
            return 0
        else
            CAN_BIND=0
            echo "Bind mounting seems to be disabled on your system."
            echo "You have maybe to check your apparmor configuration."
        fi

        # delete mountpoint directory safely
        mountpoint -q "${DESTDIR}" && sudo umount -R "${DESTDIR}"
        eval $SUDO_CMD rm -rf "${DESTDIR}"
    fi

    # ... or just copy the directory
    eval $SUDO_CMD mkdir -p $(dirname "${DESTDIR}")
    eval $SUDO_CMD cp -a "${SRCDIR}" "${DESTDIR}"
}

# Create a directory under /tmp
#
# usage: ynh_mkdir_tmp
# | ret: the created directory path
ynh_mkdir_tmp() {
    TMPDIR="/tmp/$(ynh_string_random 6)"
    while [ -d $TMPDIR ]; do
        TMPDIR="/tmp/$(ynh_string_random 6)"
    done
    mkdir -p "$TMPDIR" && echo "$TMPDIR"
}