live-install: preserve BASE_BOOTARGS in installed system

features.in/live-install/live/image-scripts.d/11-base-bootargs

+#!/bin/sh -efu
+
+# BASE_BOOTARGS are profile-provided arguments for installed systems.
+# install2 does not consume them directly, so store the materialized profile
+# value and add a preinstall hook that updates the target GRUB configuration.
+
+[ -n "${GLOBAL_BASE_BOOTARGS-}" ] || exit 0
+
+hookdir="/usr/share/install2/preinstall.d"
+args_file="/usr/share/install2/base-bootargs"
+hook="$hookdir/72-base-bootargs"
+
+install -d "$hookdir"
+printf '%s\n' "$GLOBAL_BASE_BOOTARGS" > "$args_file"
+
+cat > "$hook" << 'EOF'
+#!/bin/sh -efu
+
+. install2-init-functions
+
+args_file="@BASE_BOOTARGS_FILE@"
+grubcfg="$destdir"/etc/sysconfig/grub2
+
+[ -s "$args_file" ] || exit 0
+[ -f "$grubcfg" ] || exit 0
+
+base_bootargs="$(cat "$args_file")"
+[ -n "$base_bootargs" ] || exit 0
+
+current_bootargs="$(sed -n \
+	"s/^GRUB_CMDLINE_LINUX_DEFAULT='\\(.*\\)'$/\\1/p" \
+	"$grubcfg")"
+
+missing_bootargs=
+for arg in $base_bootargs; do
+	case " $current_bootargs$missing_bootargs " in
+		*" $arg "*) ;;
+		*) missing_bootargs="$missing_bootargs $arg" ;;
+	esac
+done
+[ -n "$missing_bootargs" ] || exit 0
+
+subst "s|^GRUB_CMDLINE_LINUX_DEFAULT='|&$missing_bootargs |" "$grubcfg" ||:
+
+:
+EOF
+
+sed -i "s|@BASE_BOOTARGS_FILE@|$args_file|" "$hook"
+chmod +x "$hook"