From b475cb2ea3d36a1692b42fa656398d68d6615cb9 Mon Sep 17 00:00:00 2001
From: Alex Crawford <alex.crawford@coreos.com>
Date: Mon, 31 Aug 2015 23:02:25 -0700
Subject: [PATCH] grub: run Ignition on first boot

---
 build_library/grub.cfg | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/build_library/grub.cfg b/build_library/grub.cfg
index e9120b718a..b1be733f33 100644
--- a/build_library/grub.cfg
+++ b/build_library/grub.cfg
@@ -11,9 +11,10 @@ insmod all_video
 set default="coreos"
 set timeout=1
 
-# Default kernel args for root filesystem and console.
+# Default kernel args for root filesystem, console, and Ignition.
 set linux_root="root=LABEL=ROOT"
 set linux_console=""
+set ignition=""
 
 # Anything else the OEM adds should use this variable.
 set linux_append=""
@@ -36,6 +37,13 @@ if [ "$secure_boot" = "0" ]; then
    fi
 fi
 
+# Determine if this is a first boot. Run Ignition if so.
+search --no-floppy --set first_boot \
+       --disk-uuid 00000000-0000-0000-0000-000000000001
+if [ -n "$first_boot" ]; then
+    set ignition="coreos.ignition.run=1"
+fi
+
 # If no specific console has been set by the OEM then select based on
 # platform, most systems use vga text as primary and ttyS0 as secondary.
 if [ -z "$linux_console" ]; then
@@ -61,20 +69,20 @@ fi
 menuentry "CoreOS default" --id=coreos {
     gptprio.next -d usr -u usr_uuid
     if [ "$usr_uuid" = "7130c94a-213a-4e5a-8e26-6cce9662f132" ]; then
-       linux$suf /coreos/vmlinuz-a $linux_console $linux_root \
+       linux$suf /coreos/vmlinuz-a $ignition $linux_console $linux_root \
             @@MOUNTUSR@@=PARTUUID=$usr_uuid $linux_append
     else
-       linux$suf /coreos/vmlinuz-b $linux_console $linux_root \
+       linux$suf /coreos/vmlinuz-b $ignition $linux_console $linux_root \
             @@MOUNTUSR@@=PARTUUID=$usr_uuid $linux_append
     fi
 }
 
 menuentry "CoreOS USR-A" --id=coreos-a {
-   linux$suf /coreos/vmlinuz-a $linux_console $linux_root \
+   linux$suf /coreos/vmlinuz-a $ignition $linux_console $linux_root \
         @@MOUNTUSR@@=PARTLABEL=USR-A $linux_append
 }
 
 menuentry "CoreOS USR-B" --id=coreos-b {
-   linux$suf /coreos/vmlinuz-b $linux_console $linux_root \
+   linux$suf /coreos/vmlinuz-b $ignition $linux_console $linux_root \
         @@MOUNTUSR@@=PARTLABEL=USR-B $linux_append
 }