Add BASE_BOOTARGS -- variable containing arguments to bootloader

features.in/bootloader/config.mk

@@ -13,6 +13,7 @@ use/bootloader: use/pkgpriorities
 	@$(call try,BASE_BOOTLOADER,grub)
 	@$(call xport,BASE_BOOTLOADER)
 	@$(call add,BASE_LISTS,$$(BASE_BOOTLOADER))
+	@$(call xport,BASE_BOOTARGS)
 ifeq (distro,$(IMAGE_CLASS))
 	@$(call add,BASE_PACKAGES,alterator-$$(BASE_BOOTLOADER))
 	@$(call add,PINNED_PACKAGES,alterator-$$(BASE_BOOTLOADER))

features.in/bootloader/rootfs/image-scripts.d/50-bootargs

+#!/bin/sh -eu
+
+if [ -n "${GLOBAL_BASE_BOOTARGS-}" ]; then
+    if [ -s /etc/sysconfig/grub2 ]; then
+        sed -Ei \
+            "s/(GRUB_CMDLINE_LINUX_DEFAULT=)(.*)(['\"])/\1\2 $GLOBAL_BASE_BOOTARGS\3/" \
+            /etc/sysconfig/grub2
+    fi
+fi

features.in/tty/config.mk

@@ -2,13 +2,16 @@ use/tty:
 	@$(call add_feature)
 	@$(call xport,TTY_DEV)
 	@$(call xport,TTY_RATE)
+	@$(call xport,BASE_BOOTARGS)
 ifeq (distro,$(IMAGE_CLASS))
 	@$(call add,INSTALL2_PACKAGES,installer-feature-serial-stage2)
 	@$(call add,BASE_PACKAGES,installer-feature-serial-stage3)
 endif
 
+comma := ,
 use/tty/S0 use/tty/SI0 use/tty/AMA0: use/tty/%: use/tty
 	@$(call add,THE_PACKAGES,agetty)
 	@$(call add,TTY_DEV,tty$*)
 	@$(call set,TTY_RATE,115200)
 	@$(call add,SYSLINUX_CFG,tty$*)
+	@$(call add,BASE_BOOTARGS,console=tty1 console=$$(TTY_DEV)$(comma)$$(TTY_RATE)n8)