Working wireguard client recipe

wireguard-client.bb

DESCRIPTION = "Wireguard VPN client configuration on /data partition"
HOMEPAGE = "https://connectorio.com/"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"

# variables used to pre-populate wireguard interface

export WG_CLIENT_ADDRESS ?= ""
export WG_CLIENT_PRIVATE_KEY ?= ""
export WG_CLIENT_PRESHARED_KEY ?= ""
export WG_CLIENT_ALLOWED_IP ?= ""
export WG_CLIENT_KEEP_ALIVE ?= "15"

export WG_SERVER_PUBLIC_KEY ?= ""
export WG_SERVER_ADDRESS ?= ""
export WG_SERVER_PORT ?= "51820"

DEPENDS_${PN} = "wireguard-tools systemd"
RDEPENDS_${PN} = "wireguard-tools systemd"
PACKAGECONFIG = "wireguard-tools systemd"

# Additional file necessary to fix systemd unit location, patched
# file://wg-quick@.service
SRC_URI = " \
    file://wg0.conf \
"
PR = "r1"

do_configure[noexec] = "1"
do_compile[noexec] = "1"

do_install() {
    install -d -m 0700 ${D}${PERSISTENT_DATA_DIR}/system/etc/wireguard
    install -m 0640 ${WORKDIR}/wg0.conf ${D}${PERSISTENT_DATA_DIR}/system/etc/wireguard/wg0.conf

    install -d -m 0700 ${D}${sysconfdir}/wireguard
    lnr ${D}${PERSISTENT_DATA_DIR}/system/etc/wireguard/wg0.conf ${D}${sysconfdir}/wireguard/wg0.conf

    sed -i -e "s#@WG_CLIENT_ADDRESS@#$WG_CLIENT_ADDRESS#g" \
      -e "s#@WG_CLIENT_PRIVATE_KEY@#$WG_CLIENT_PRIVATE_KEY#g" \
      -e "s#@WG_CLIENT_PRESHARED_KEY@#$WG_CLIENT_PRESHARED_KEY#g" \
      -e "s#@WG_CLIENT_ALLOWED_IP@#$WG_CLIENT_ALLOWED_IP#g" \
      -e "s#@WG_CLIENT_KEEP_ALIVE@#$WG_CLIENT_KEEP_ALIVE#g" \
      -e "s#@WG_SERVER_PUBLIC_KEY@#$WG_SERVER_PUBLIC_KEY#g" \
      -e "s#@WG_SERVER_PORT@#$WG_SERVER_PORT#g" \
      -e "s#@WG_SERVER_ADDRESS@#$WG_SERVER_ADDRESS#g" \
      ${D}${PERSISTENT_DATA_DIR}/system/etc/wireguard/wg0.conf
}

# ${systemd_system_unitdir}/wg-quick@.service
FILES_${PN} =  "\
    ${PERSISTENT_DATA_DIR}/system/etc/wireguard/wg0.conf \
    ${sysconfdir}/wireguard/wg0.conf \
    "

# Below section will not work unless we switch recipe to append to wireguard-tools
# we leave it commented cause it is enabled during first boot
#inherit systemd
#SYSTEMD_PACKAGES = "wireguard-tools"
#SYSTEMD_PACKAGES_${PN} = "wireguard-tools"
#SYSTEMD_SERVICE_${PN} = "wg-quick@wg0.service"
#SYSTEMD_AUTO_ENABLE = "enable"