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ostree-grub-generator: allow adding custom scripts to grub.cfg

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This changes allow us to customize grub.cfg without manually editing it.

Now, whatever files found under /etc/ostree.d are added (in alphabetical
order) between the cfg header and its menuentries, allowing to add
custom logic to the bootloader in a non intrusive way.

Signed-off-by: Eduardo Ferreira <eduardo.barbosa@toradex.com>
This commit is contained in:
Eduardo Ferreira 2024-02-08 10:31:04 -03:00
parent da89214065
commit c9260ffc55
1 changed files with 13 additions and 0 deletions
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13
src/boot/grub2/ostree-grub-generator
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@ -25,6 +25,7 @@ script=$(basename ${0})
# Atomically safe location where to generete grub.cfg when executing system upgrade. # Atomically safe location where to generete grub.cfg when executing system upgrade.
new_grub2_cfg=${2} new_grub2_cfg=${2}
entries_path=$(dirname $new_grub2_cfg)/entries entries_path=$(dirname $new_grub2_cfg)/entries
custom_scripts="/etc/ostree.d"
read_config() read_config()
{ {
@ -105,10 +106,22 @@ timeout=10
EOF EOF
} }
populate_custom_section()
{
if [ -d "$custom_scripts" ]; then
for script in $(ls -v $custom_scripts/*); do
echo -e "\n### BEGIN ${script} ###" >> ${new_grub2_cfg}
cat ${script} >> ${new_grub2_cfg}
echo -e "\n### END ${script} ###\n" >> ${new_grub2_cfg}
done
fi
}
generate_grub2_cfg() generate_grub2_cfg()
{ {
populate_warning populate_warning
populate_header populate_header
populate_custom_section
populate_menu populate_menu
} }