Add OS agent (#1269)

* Add OS Agent

* Do go vendoring as part of the buildroot build

* Allow to skip confirmation in datactl

buildroot-external/package/os-agent/Config.in

@@ -0,0 +1,4 @@
+config BR2_PACKAGE_OS_AGENT
+	bool "Home Assistant OS Agent"
+	help
+	  Install the Home Assistant OS Agent

buildroot-external/package/os-agent/os-agent.mk

@@ -0,0 +1,27 @@
+################################################################################
+#
+# foo
+#
+################################################################################
+
+OS_AGENT_VERSION = 0cb548c6acfb7e0a9542e6c85ffbce626af04cce
+OS_AGENT_SITE = $(call github,home-assistant,os-agent,$(OS_AGENT_VERSION))
+OS_AGENT_LICENSE = Apache License 2.0
+OS_AGENT_LICENSE_FILES = LICENSE
+OS_AGENT_GOMOD = github.com/home-assistant/os-agent
+
+define OS_AGENT_INSTALL_INIT_SYSTEMD
+	$(INSTALL) -D -m 0644 $(@D)/contrib/io.homeassistant.conf \
+		$(TARGET_DIR)/etc/dbus-1/system.d/io.homeassistant.conf
+	$(INSTALL) -D -m 0644 $(@D)/contrib/haos-agent.service \
+		$(TARGET_DIR)/usr/lib/systemd/system/haos-agent.service
+endef
+
+define OS_AGENT_GO_VENDORING
+	(cd $(@D); \
+		$(HOST_DIR)/bin/go mod vendor)
+endef
+
+OS_AGENT_POST_PATCH_HOOKS += OS_AGENT_GO_VENDORING
+
+$(eval $(golang-package))