wic: Prepare wicboot to allow custom bootloader config

Currently wic does the bootloader configuration file on the fly.
This change introduce a configfile variable for the bootloader;
this is to have a user defined configuration file for the
bootloaders (grub, syslinux, and gummiboot). This is particular
useful when having a multiboot system or scripts embedded in the
configuration file.

[YOCTO #8728]

(From OE-Core rev: 8347aee95ea271921c15ea8e580f0ff62325aa26)

Signed-off-by: Mariano Lopez <mariano.lopez@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/scripts/lib/wic/kickstart/__init__.py b/scripts/lib/wic/kickstart/__init__.py
index c9b0e51f3c..79b39fbf3f 100644
--- a/scripts/lib/wic/kickstart/__init__.py
+++ b/scripts/lib/wic/kickstart/__init__.py
@@ -97,6 +97,13 @@ def get_timeout(kickstart, default=None):
         return default
     return int(kickstart.handler.bootloader.timeout)
 
+def get_bootloader_file(kickstart, default=None):
+    if not hasattr(kickstart.handler.bootloader, "configfile"):
+        return default
+    if kickstart.handler.bootloader.configfile is None:
+        return default
+    return kickstart.handler.bootloader.configfile
+
 def get_kernel_args(kickstart, default="ro rd.live.image"):
     if not hasattr(kickstart.handler.bootloader, "appendLine"):
         return default