src/kernel-install/00-entry-directory.install

#!/usr/bin/env bash
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh

COMMAND="$1"
KERNEL_VERSION="$2"
ENTRY_DIR_ABS="$3"
KERNEL_IMAGE="$4"
INITRD_OPTIONS_START="5"

if ! [[ $KERNEL_INSTALL_MACHINE_ID ]]; then
    exit 0
fi

if [[ $COMMAND != add ]]; then
     exit 0
fi

# If the boot dir exists (e.g. $ESP/<machine-id>),
# create the entry directory ($ESP/<machine-id>/<kernel-version>).
# This is the only function of this plugin.
MACHINE_ID_DIR="${ENTRY_DIR_ABS%/*}"
if ! [ -d "$MACHINE_ID_DIR" ]; then
    exit 0
fi

if [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ]; then
    echo "+mkdir -v -p $ENTRY_DIR_ABS"
    exec mkdir -v -p "$ENTRY_DIR_ABS"
else
    exec mkdir -p "$ENTRY_DIR_ABS"
fi