MycroftOS: Firstboot systemd system

- System to run sccripts at the very first boot. Now currently used
  only for resizing the partion using the full SD size.
- Can be expanded to run other scripts to prepare stuff at the
  very first boot.

buildroot-external/Config.in

@@ -1,4 +1,5 @@
 menu "Mycroft A.I. Personal Assistant"
+	source "$BR2_EXTERNAL_MYCROFTOS_PATH/package/firstboot-service/Config.in"
 	source "$BR2_EXTERNAL_MYCROFTOS_PATH/package/python-mycroft/Config.in"
 	source "$BR2_EXTERNAL_MYCROFTOS_PATH/package/mycroft-service/Config.in"
 	source "$BR2_EXTERNAL_MYCROFTOS_PATH/package/mycroft-splash/Config.in"

buildroot-external/configs/mycroftos_rpi3_defconfig

@@ -187,6 +187,7 @@ BR2_PACKAGE_HOST_PYTHON_CYTHON=y
 BR2_PACKAGE_HOST_PYTHON_LXML=y
 BR2_PACKAGE_HOST_PYTHON_SIX=y
 BR2_PACKAGE_HOST_PYTHON_XLRD=y
+BR2_PACKAGE_FIRSTBOOT_SERVICE=y
 BR2_PACKAGE_PYTHON_MYCROFT=y
 BR2_PACKAGE_MYCROFT_SERVICE=y
 BR2_PACKAGE_MYCROFT_SPLASH=y

buildroot-external/package/firstboot-service/Config.in

@@ -0,0 +1,8 @@
+config BR2_PACKAGE_FIRSTBOOT_SERVICE
+	bool "firstboot-service"
+	help
+	  A systemd service that only runs on first boot
+	  which can be used to run certain scripts that
+	  prepare the rootfs. For now being used to auto
+	  expand the filesystem over the full size of the
+	  SD card.

buildroot-external/package/firstboot-service/firstboot

@@ -0,0 +1,4 @@
+#!/bin/bash
+#
+/usr/sbin/resizeSD &&
+rm /etc/firstboot

buildroot-external/package/firstboot-service/firstboot-service.mk

@@ -0,0 +1,24 @@
+################################################################################
+#
+# firstboot-service
+#
+################################################################################
+
+FIRSTBOOT_SERVICE_VERSION = 0.1.0
+FIRSTBOOT_SERVICE_SITE = $(BR2_EXTERNAL_MYCROFTOS_PATH)/package/firstboot-service
+FIRSTBOOT_SERVICE_SITE_METHOD = local
+FIRSTBOOT_SERVICE_LICENSE = Apache License 2.0
+FIRSTBOOT_SERVICE_LICENSE_FILES = LICENSE
+
+define FIRSTBOOT_SERVICE_INSTALL_TARGET_CMDS
+	$(INSTALL) -m 0755 $(@D)/resizeSD $(TARGET_DIR)/usr/sbin/
+	$(INSTALL) -m 0755 $(@D)/firstboot $(TARGET_DIR)/usr/sbin/
+	$(INSTALL) -D -m 644 $(@D)/firstboot.service \
+		$(TARGET_DIR)/usr/lib/systemd/system/firstboot.service
+	mkdir -p $(TARGET_DIR)/etc/systemd/system/sysinit.target.wants
+	ln -fs ../../../../usr/lib/systemd/system/firstboot.service \
+		$(TARGET_DIR)/etc/systemd/system/sysinit.target.wants/firstboot.service
+	touch $(TARGET_DIR)/etc/firstboot
+endef
+
+$(eval $(generic-package))

buildroot-external/package/firstboot-service/firstboot.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=First Boot run script
+DefaultDependencies=no
+Conflicts=shutdown.target
+After=systemd-remount-fs.service
+Before=sysinit.target shutdown.target
+ConditionPathIsReadWrite=/etc
+ConditionFirstBoot=yes
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/sbin/resizeSD
+
+[Install]
+WantedBy=sysinit.target

buildroot-external/package/firstboot-service/resizeSD

@@ -0,0 +1,9 @@
+#!/bin/bash
+#
+printf "Resize data partition ..."
+parted /dev/mmcblk0 unit % resizepart 2 100% &&
+partprobe /dev/mmcblk0 &&
+sync &&
+resize2fs /dev/mmcblk0p2 &&
+echo "[OK]"
+