[PATCH v4] ref-manual: Describe grub-efi-cfg overrides and GRUB_TITLE

[PATCH v4] ref-manual: Describe grub-efi-cfg overrides and GRUB_TITLE

[Simon A. Eugster]

This patch describes how to use overrides for grub-efi-cfg because that
is otherwise only clear after reading the .bbclass file. It also adds
a description for GRUB_TITLE.

Signed-off-by: Simon A. Eugster <simon.eu@gmail.com>
---
 documentation/ref-manual/classes.rst   | 16 ++++++++++++++++
 documentation/ref-manual/variables.rst |  5 +++++
 2 files changed, 21 insertions(+)

diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst
index 761be7b545..8bc60e24aa 100644
--- a/documentation/ref-manual/classes.rst
+++ b/documentation/ref-manual/classes.rst
@@ -991,6 +991,7 @@ This class supports several variables:
 
 -  :term:`INITRD`: Indicates list of filesystem images to
    concatenate and use as an initial RAM disk (initrd) (optional).
+   Can be specified for each ``LABEL``.
 
 -  :term:`ROOTFS`: Indicates a filesystem image to include
    as the root filesystem (optional).
@@ -1004,6 +1005,9 @@ This class supports several variables:
 -  :term:`APPEND`: An override list of append strings for
    each ``LABEL``.
 
+-  :term:`GRUB_TITLE`: A custom title for each ``LABEL``. If a label does not
+   have a custom title, the label is used as title for the GRUB menu entry.
+
 -  :term:`GRUB_OPTS`: Additional options to add to the
    configuration (optional). Options are delimited using semi-colon
    characters (``;``).
@@ -1011,6 +1015,18 @@ This class supports several variables:
 -  :term:`GRUB_TIMEOUT`: Timeout before executing
    the default ``LABEL`` (optional).
 
+Each ``LABEL`` defined in the :term:`LABELS` variable creates a GRUB boot
+entry, and some variables can be defined individually per ``LABEL``. The label
+specific override names are defined as ``grub_LABEL``.
+
+For example, for a label ``factory``, the override name would be
+``grub_factory``. A custom GRUB menu entry titled "Factory Install" with the
+additional parameter ``factory=yes`` can be achieved as follows::
+
+   LABELS:append = " factory"
+   APPEND:grub_factory = "factory=yes"
+   GRUB_TITLE:grub_factory = "Factory Install"
+
 .. _ref-classes-gsettings:
 
 ``gsettings``
diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index 0c5c7aab97..4eb11abede 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -3320,6 +3320,11 @@ system and gives an overview of their function and contents.
       :ref:`ref-classes-grub-efi` class for more information
       on how this variable is used.
 
+   :term:`GRUB_TITLE`
+      Specifies custom titles for GRUB labels defined in  :term:`LABELS`. See
+      the :ref:`ref-classes-grub-efi` class for more information on how this
+      variable is used.
+
    :term:`GTKIMMODULES_PACKAGES`
       When inheriting the :ref:`ref-classes-gtk-immodules-cache` class,
       this variable specifies the packages that contain the GTK+ input
-- 
2.43.0

Re: [PATCH v4] ref-manual: Describe grub-efi-cfg overrides and GRUB_TITLE

[Antonin Godard]

Hi Simon,

On Fri Jan 31, 2025 at 1:17 PM CET, Simon A. Eugster wrote:
> This patch describes how to use overrides for grub-efi-cfg because that
> is otherwise only clear after reading the .bbclass file. It also adds
> a description for GRUB_TITLE.
>
> Signed-off-by: Simon A. Eugster <simon.eu@gmail.com>
> ---
>  documentation/ref-manual/classes.rst   | 16 ++++++++++++++++
>  documentation/ref-manual/variables.rst |  5 +++++
>  2 files changed, 21 insertions(+)
>
> diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst
> index 761be7b545..8bc60e24aa 100644
> --- a/documentation/ref-manual/classes.rst
> +++ b/documentation/ref-manual/classes.rst
> @@ -991,6 +991,7 @@ This class supports several variables:
>  
>  -  :term:`INITRD`: Indicates list of filesystem images to
>     concatenate and use as an initial RAM disk (initrd) (optional).
> +   Can be specified for each ``LABEL``.
>  
>  -  :term:`ROOTFS`: Indicates a filesystem image to include
>     as the root filesystem (optional).
> @@ -1004,6 +1005,9 @@ This class supports several variables:
>  -  :term:`APPEND`: An override list of append strings for
>     each ``LABEL``.
>  
> +-  :term:`GRUB_TITLE`: A custom title for each ``LABEL``. If a label does not
> +   have a custom title, the label is used as title for the GRUB menu entry.
> +
>  -  :term:`GRUB_OPTS`: Additional options to add to the
>     configuration (optional). Options are delimited using semi-colon
>     characters (``;``).
> @@ -1011,6 +1015,18 @@ This class supports several variables:
>  -  :term:`GRUB_TIMEOUT`: Timeout before executing
>     the default ``LABEL`` (optional).
>  
> +Each ``LABEL`` defined in the :term:`LABELS` variable creates a GRUB boot
> +entry, and some variables can be defined individually per ``LABEL``. The label
> +specific override names are defined as ``grub_LABEL``.
> +
> +For example, for a label ``factory``, the override name would be
> +``grub_factory``. A custom GRUB menu entry titled "Factory Install" with the
> +additional parameter ``factory=yes`` can be achieved as follows::
> +
> +   LABELS:append = " factory"
> +   APPEND:grub_factory = "factory=yes"
> +   GRUB_TITLE:grub_factory = "Factory Install"
> +
>  .. _ref-classes-gsettings:
>  
>  ``gsettings``
> diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
> index 0c5c7aab97..4eb11abede 100644
> --- a/documentation/ref-manual/variables.rst
> +++ b/documentation/ref-manual/variables.rst
> @@ -3320,6 +3320,11 @@ system and gives an overview of their function and contents.
>        :ref:`ref-classes-grub-efi` class for more information
>        on how this variable is used.
>  
> +   :term:`GRUB_TITLE`
> +      Specifies custom titles for GRUB labels defined in  :term:`LABELS`. See
> +      the :ref:`ref-classes-grub-efi` class for more information on how this
> +      variable is used.
> +
>     :term:`GTKIMMODULES_PACKAGES`
>        When inheriting the :ref:`ref-classes-gtk-immodules-cache` class,
>        this variable specifies the packages that contain the GTK+ input

Reviewed-by: Antonin Godard <antonin.godard@bootlin.com>

Thank you!
Antonin

-- 
Antonin Godard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

Re: [PATCH v4] ref-manual: Describe grub-efi-cfg overrides and GRUB_TITLE

[Antonin Godard]

On Fri, 31 Jan 2025 13:17:05 +0100, Simon A. Eugster wrote:
> This patch describes how to use overrides for grub-efi-cfg because that
> is otherwise only clear after reading the .bbclass file. It also adds
> a description for GRUB_TITLE.

Applied, thanks!

[1/1] ref-manual: Describe grub-efi-cfg overrides and GRUB_TITLE
      commit: b9ec7d124c9cbaf6c05415277fa028a39ce9e02f

Best regards,
-- 
Antonin Godard <antonin.godard@bootlin.com>