ifdef imagesize
  ROOT_MB := $(shell printf '%i\n' "$$(( ${imagesize} - ${BOOT_MB} - 3 ))")
endif

PACKAGES += btrfs-tools bzip2 ca-certificates cron deborphan firmware-linux-free gzip htop ifupdown iputils-ping irqbalance isc-dhcp-client less make net-tools nmap ntpdate openssh-client psmisc rsync sshfs sudo traceroute unzip vim wget wireless-tools wpasupplicant xz-utils zip

ifdef packages
  PACKAGES += $(subst ${comma_},${space_},${packages})
endif

export DEBCONF

define DEBCONF :=

keyboard-configuration	keyboard-configuration/model	select	Generic 105-key (Intl) PC
keyboard-configuration	keyboard-configuration/variant	select	English (US) - English (Macintosh)
endef

.PHONY: _debconf_selections
_install: _debconf_selections
_debconf_selections: ${SYSROOT}
	printf '%s\n' "$${DEBCONF}" |chroot "$${SYSROOT}" debconf-set-selections

.PHONY: _timezone _locales

ifdef timezone
  export timezone
  PACKAGES += tzdata
  _config: _timezone
endif

ifdef locales
  PACKAGES += locales
  _config: _locales
endif

_timezone: ${CFGROOT}
	printf '%s\n' "$${timezone}" >"$${CFGROOT}/etc/timezone"
	ln -sf /usr/share/zoneinfo/"$${timezone}" "$${CFGROOT}/etc/localtime"

_locales: ${CFGROOT}
	for l in $(subst ${comma_},${space_},${locales}); do \
		printf '%s %s\n' "$${l}" "$${l#*.}"; \
	done >"$${CFGROOT}/etc/locale.gen"
	printf 'LANG=%s\n' "$(firstword $(subst ${comma_},${space_},${locales}))" >"$${CFGROOT}/etc/default/locale"
	chroot "$${CFGROOT}" locale-gen

.PHONY: _rootpass _users _hostname

ifdef rootpass
  export rootpass
  _config: _rootpass
endif

ifdef rootkey
  export rootkey
  _config: _rootkey
endif

ifdef users
  _config: _users
endif

ifdef hostname
  export hostname
  _config: _hostname
endif

_rootpass: ${CFGROOT}
	chroot "$${CFGROOT}" usermod -p "$$(openssl passwd "$${rootpass}")" root

${rootkey}.pub:
	ssh-keygen -N '' -f "$${rootkey}"

_rootkey: ${CFGROOT} ${rootkey}.pub
	mkdir -m 700 "$${CFGROOT}/root/.ssh/"
	cp "$${rootkey}.pub" "$${CFGROOT}/root/.ssh/authorized_keys"

_users: ${CFGROOT}
	for u in $(subst ${comma_},${space_},${users}); do \
		chroot "$${CFGROOT}" useradd -m -s /bin/bash -p "$$(openssl passwd "")" "$$u"; \
	done

_hostname: ${CFGROOT}
	printf '%s\n' "$${hostname}" "$${CFGROOT}/etc/hostname"

ifdef wifi
  _config: ${CFGROOT}/etc/network/interfaces.d/wifi
  ifdef wifipass
    export wifi wifipass
    ${CFGROOT}/etc/network/interfaces.d/wifi: ${CFGROOT}
	printf 'auto wlan0\nallow-hotplug wlan0\n\niface wlan0 inet dhcp\n' >$@
	printf '  wpa-ssid "%s"\n  wpa-psk "%s"\n' "$$wifi" "$$wifipass" >>$@
  else
    export wifi
    ${CFGROOT}/etc/network/interfaces.d/wifi: ${CFGROOT}
	printf 'auto wlan0\nallow-hotplug wlan0\n\niface wlan0 inet dhcp\n' >$@
	printf '  wireless-ssid "%s"\n' "$$wifi" >>$@
  endif
endif