[OE-core] [PATCH] wic: isoimage-isohybrid: implement grubefi menu logic

[Ed Bartosh]

Hi Ioan-Adrian,

Did you test if this patch works on master?
>From the first look I'd say it will not work as --menu bootloader
option is not implemented there.

On Mon, Apr 18, 2016 at 03:46:22PM +0300, Ioan-Adrian Ratiu wrote:
> Right now isoimage-isohybrid creates a single boot menu entry "boot"
> and passes it the arguments supplied with "--append". There is logic
> for creating custom grub menus, but it is sadly not used. "boot" is
> hardcoded.
> 
> This change makes isoimage use the wic bootloader "--menu" argument to
> create its menus. The syntax used for menu specification was chosen so
> it does not conflict with the kernel parameter syntax (you can pass
> custom kernel arguments from the generated grub menu entries, like for
> example silent booting, thread affinity etc.).
> 
> The "--menu" argument syntax is as following. The argument supplies a
> collection of menu entry names and kernel parameters. Menu name entries
> can contain any ASCII character except | or : which are separators.
> Kernel parameters obey the syntax defined by the kernel documentation.
> | is the menu separator and : is the separator between the menu names
> and parameters.
> 
> Example for use in wks files:
>   --menu "Menu Name:firstarg,secondard|Menu Name 2:anotherarg,otherarg"
> 
> Signed-off-by: Ioan-Adrian Ratiu <adrian.ratiu at ni.com>
> ---
>  .../lib/wic/plugins/source/isoimage-isohybrid.py   | 35 ++++++++++++++++------
>  1 file changed, 26 insertions(+), 9 deletions(-)
> 
> diff --git a/scripts/lib/wic/plugins/source/isoimage-isohybrid.py b/scripts/lib/wic/plugins/source/isoimage-isohybrid.py
> index bc99283..4b0b035 100644
> --- a/scripts/lib/wic/plugins/source/isoimage-isohybrid.py
> +++ b/scripts/lib/wic/plugins/source/isoimage-isohybrid.py
> @@ -101,23 +101,40 @@ class IsoImagePlugin(SourcePlugin):
>              splashline = ""
>  
>          bootloader = creator.ks.bootloader
> +        kernel = "/bzImage"
> +        default_options = bootloader.append
> +        default_menu_to_boot = "Default boot"
> +        grub_menus = ""
> +
> +        # menu separators are '|', custom boot args separated by ':', ex.
> +        # --menu "Menu Name:firstarg,secondard|Menu Name 2:anotherarg,otherarg"
> +        for menu in bootloader.menus.split('|'):
> +            menu_list = menu.split(":")
> +            menu_name = menu_list[0]
> +            grub_menu_options = ""
> +
> +            if (len(menu_list) > 1):
> +                menu_params = menu_list[1]
> +                for param in menu_params.split(','):
> +                    if param.lower() == "default":
> +                        default_menu_to_boot = menu_name
> +                    else: grub_menu_options += " " + param
> +
> +            grub_menus += "menuentry '%s' {\n" % menu_name
> +            grub_menus += "linux %s rootwait %s %s\n" % \
> +                (kernel, default_options, grub_menu_options)
> +            grub_menus += "initrd /initrd \n"
> +            grub_menus += "}\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 += "default=%s\n" % default_menu_to_boot
>          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"
> -
> -        grubefi_conf += "linux %s rootwait %s\n" \
> -            % (kernel, bootloader.append)
> -        grubefi_conf += "initrd /initrd \n"
> -        grubefi_conf += "}\n"
> +        grubefi_conf += grub_menus
>  
>          if splashline:
>              grubefi_conf += "%s\n" % splashline

--
Regards,
Ed