adguardhome: Implement initial package recipe

AdGuardHome is a network-wide ads and trackers blocking DNS server.
After installing it with opkg, start it like every service:
/etc/init.d/adguardhome start

In order to complete the installation vist http://{YOUR_ROUTERS_IP}:3000.

Then you can setup dnsmasq to forward DNS traffic to AdGuardHome:
uci -q delete dhcp.@dnsmasq[0].server
uci add_list dhcp.@dnsmasq[0].server=127.0.0.1#{PORT_SET_DURING_INSTALL}
uci set dhcp.@dnsmasq[0].noresolv=1
uci commit dhcp
/etc/init.d/dnsmasq restart

Signed-off-by: Dobroslaw Kijowski <dobo90@gmail.com>

net/adguardhome/Makefile

@@ -0,0 +1,66 @@
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=adguardhome
+PKG_VERSION:=0.103.3
+PKG_RELEASE:=1
+
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_VERSION:=v$(PKG_VERSION)
+PKG_SOURCE_URL:=https://github.com/AdguardTeam/AdGuardHome
+PKG_MIRROR_HASH:=edf00ede9d208b7f78574e267ad2617dd4d4f06548cb2e6369cc1ad702427d9a
+
+PKG_LICENSE:=GPL-3.0-only
+PKG_LICENSE_FILES:=LICENSE.txt
+PKG_MAINTAINER:=Dobroslaw Kijowski <dobo90@gmail.com>
+
+PKG_BUILD_DEPENDS:=golang/host node/host packr/host
+PKG_BUILD_PARALLEL:=1
+PKG_USE_MIPS16:=0
+
+GO_PKG:=github.com/AdguardTeam/AdGuardHome
+GO_PKG_EXCLUDES:=dhcpd/standalone
+GO_PKG_LDFLAGS_X:=main.version=$(PKG_VERSION) main.channel=release main.goarm=$(GO_ARM)
+
+include $(INCLUDE_DIR)/package.mk
+include ../../lang/golang/golang-package.mk
+
+define Package/adguardhome
+	SECTION:=net
+	CATEGORY:=Network
+	TITLE:=Network-wide ads and trackers blocking DNS server
+	URL:=https://github.com/AdguardTeam/AdGuardHome
+	DEPENDS:=$(GO_ARCH_DEPENDS) +ca-bundle
+endef
+
+define Package/adguardhome/conffiles
+/etc/adguardhome.yaml
+endef
+
+define Package/adguardhome/description
+Free and open source, powerful network-wide ads and trackers blocking DNS server.
+endef
+
+define Build/Compile
+	( \
+		pushd $(PKG_BUILD_DIR) ; \
+		npm --prefix client ci ; \
+		npm --prefix client run build-prod ; \
+		packr -z -v -i home ; \
+		popd ; \
+		$(call GoPackage/Build/Compile) ; \
+	)
+endef
+
+define Package/adguardhome/install
+	$(call GoPackage/Package/Install/Bin,$(1))
+	$(INSTALL_DIR) $(1)/etc/init.d
+	$(INSTALL_BIN) ./files/adguardhome.init $(1)/etc/init.d/adguardhome
+endef
+
+$(eval $(call GoBinPackage,adguardhome))
+$(eval $(call BuildPackage,adguardhome))

net/adguardhome/files/adguardhome.init

@@ -0,0 +1,17 @@
+#!/bin/sh /etc/rc.common
+
+PROG=/usr/bin/AdGuardHome
+USE_PROCD=1
+
+# starts after network starts
+START=21
+# stops before networking stops
+STOP=89
+
+start_service() {
+  procd_open_instance
+  procd_set_param command "$PROG" -c /etc/adguardhome.yaml -w /tmp/adguardhome --no-check-update
+  procd_set_param stdout 1
+  procd_set_param stderr 1
+  procd_close_instance
+}