From 56cab8bb71bcd0b23ca360fe496f689dd19438c6 Mon Sep 17 00:00:00 2001
From: Seppo Yli-Olli <seppo.yliolli@gmail.com>
Date: Wed, 1 Feb 2023 17:55:51 +0200
Subject: [PATCH] Support building only sysa with chroot mode

This is intended primarily for external build systems that directly
bind into sysa and sysc rather than using rootfs Python wrapper.
---
 rootfs.py   | 1 +
 sysa/run.sh | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/rootfs.py b/rootfs.py
index 5a49208..7717a2b 100755
--- a/rootfs.py
+++ b/rootfs.py
@@ -31,6 +31,7 @@ def create_configuration_file(args):
     with open(config_path, "w", encoding="utf_8") as config:
         config.write("FORCE_TIMESTAMPS=" + str(args.force_timestamps) + "\n")
         config.write("CHROOT=" + str(args.chroot or args.bwrap) + "\n")
+        config.write("CHROOT_ONLY_SYSA=False\n")
         config.write("UPDATE_CHECKSUMS=" + str(args.update_checksums) + "\n")
         config.write("DISK=sda1\n")
 
diff --git a/sysa/run.sh b/sysa/run.sh
index 6463d58..7428e7d 100755
--- a/sysa/run.sh
+++ b/sysa/run.sh
@@ -250,4 +250,6 @@ fi
 # In chroot mode transition directly into System C.
 SYSC=/sysc_image
 sys_transfer "${SYSC}" /sysc gzip patch
-exec chroot "${SYSC}" /init
+if [ "${CHROOT_ONLY_SYSA}" != True ]; then
+    exec chroot "${SYSC}" /init
+fi