[OE-core] [PATCH] wic: isoimage-isohybrid: add grubefi configfile support

[Ioan-Adrian Ratiu]

The latest wic kickstart refactoring introduced a bootloader option
"--configfile" which lets wks' specify a custom grub.cfg for use
while booting. This is very useful for creating stuff like boot menus.

This change lets isoimage-isohybrid use --configfile; if this option is
not specified in a wks, it generates a default cfg as before.

Signed-off-by: Ioan-Adrian Ratiu <adrian.ratiu at ni.com>
---
 .../lib/wic/plugins/source/isoimage-isohybrid.py   | 53 +++++++++++++---------
 1 file changed, 32 insertions(+), 21 deletions(-)

diff --git a/scripts/lib/wic/plugins/source/isoimage-isohybrid.py b/scripts/lib/wic/plugins/source/isoimage-isohybrid.py
index bc99283..8440581 100644
--- a/scripts/lib/wic/plugins/source/isoimage-isohybrid.py
+++ b/scripts/lib/wic/plugins/source/isoimage-isohybrid.py
@@ -27,6 +27,7 @@ import glob
 
 from wic import msger
 from wic.pluginbase import SourcePlugin
+from wic.utils.misc import get_custom_config
 from wic.utils.oe.misc import exec_cmd, exec_native_cmd, get_bitbake_var
 
 class IsoImagePlugin(SourcePlugin):
@@ -94,33 +95,43 @@ class IsoImagePlugin(SourcePlugin):
         """
         Create loader-specific (grub-efi) config
         """
-        splash = os.path.join(cr_workdir, "/EFI/boot/splash.jpg")
-        if os.path.exists(splash):
-            splashline = "menu background splash.jpg"
+        configfile = creator.ks.bootloader.configfile
+        if configfile:
+            grubefi_conf = get_custom_config(configfile)
+            if grubefi_conf:
+                msger.debug("Using custom configuration file "
+                        "%s for grub.cfg" % configfile)
+            else:
+                msger.error("configfile is specified but failed to "
+                        "get it from %s." % configfile)
         else:
-            splashline = ""
+            splash = os.path.join(cr_workdir, "/EFI/boot/splash.jpg")
+            if os.path.exists(splash):
+                splashline = "menu background splash.jpg"
+            else:
+                splashline = ""
 
-        bootloader = creator.ks.bootloader
+            bootloader = creator.ks.bootloader
 
-        grubefi_conf = ""
-        grubefi_conf += "serial --unit=0 --speed=115200 --word=8 "
-        grubefi_conf += "--parity=no --stop=1\n"
-        grubefi_conf += "default=boot\n"
-        grubefi_conf += "timeout=%s\n" % (bootloader.timeout or 10)
-        grubefi_conf += "\n"
-        grubefi_conf += "search --set=root --label %s " % part.label
-        grubefi_conf += "\n"
-        grubefi_conf += "menuentry 'boot'{\n"
+            grubefi_conf = ""
+            grubefi_conf += "serial --unit=0 --speed=115200 --word=8 "
+            grubefi_conf += "--parity=no --stop=1\n"
+            grubefi_conf += "default=boot\n"
+            grubefi_conf += "timeout=%s\n" % (bootloader.timeout or 10)
+            grubefi_conf += "\n"
+            grubefi_conf += "search --set=root --label %s " % part.label
+            grubefi_conf += "\n"
+            grubefi_conf += "menuentry 'boot'{\n"
 
-        kernel = "/bzImage"
+            kernel = "/bzImage"
 
-        grubefi_conf += "linux %s rootwait %s\n" \
-            % (kernel, bootloader.append)
-        grubefi_conf += "initrd /initrd \n"
-        grubefi_conf += "}\n"
+            grubefi_conf += "linux %s rootwait %s\n" \
+                            % (kernel, bootloader.append)
+            grubefi_conf += "initrd /initrd \n"
+            grubefi_conf += "}\n"
 
-        if splashline:
-            grubefi_conf += "%s\n" % splashline
+            if splashline:
+                grubefi_conf += "%s\n" % splashline
 
         msger.debug("Writing grubefi config %s/EFI/BOOT/grub.cfg" \
                         % cr_workdir)
-- 
2.8.0