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Make 'grub-mkconfig' command name configurable (#56)

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* Make 'grub-mkconfig' command name configurable

- Use 'grub-mkconfig' as the default
- Note that some systems use 'grub2-mkconfig'
- Update 10-update_grub.conf to use the configurable grub directory name
- Refactor the systemd commands for clarity and to avoid duplicate regeneration on first run

* Update check_uuid_required() to work for partial regeneration of the GRUB menu
This commit is contained in:
Nathan Parsons
2018-08-15 13:02:13 +01:00
committed by Antynea
parent a1a48d26b7
commit 35703e71c1
5 changed files with 37 additions and 20 deletions
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7
10-update_grub.conf
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@@ -1,2 +1,7 @@
[Service]
ExecStartPost=/usr/sbin/grub-mkconfig -o /boot/grub/grub.cfg
# Set the possible paths for `grub-mkconfig`
Environment="PATH=/sbin:/bin:/usr/sbin:/usr/bin"
# Load environment variables from the configuration
EnvironmentFile=/etc/grub.d/41_snapshots-btrfs_config
# Regenerate just '/boot/grub/grub-btrfs.cfg' if it exists, else regenerate the whole grub menu
ExecStartPost=/bin/bash -c 'if [ -s "/boot/${GRUB_BTRFS_DIRNAME:-grub}/grub-btrfs.cfg" ]; then /etc/grub.d/41_snapshots-btrfs; else ${GRUB_BTRFS_MKCONFIG:-/usr/bin/grub-mkconfig} -o /boot/${GRUB_BTRFS_DIRNAME:-grub}/grub.cfg; fi'

34
41_snapshots-btrfs
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@@ -5,7 +5,7 @@
# Written by: Antynea
# BTC donation address: 1Lbvz244WA8xbpHek9W2Y12cakM6rDe5Rt
# Github: https://github.com/Antynea/grub-btrfs
#
#
# Purpose: Include btrfs snapshots at boot options (grub-menu).
#
# What this script does:
@@ -96,14 +96,20 @@ grub_directory=${GRUB_BTRFS_DIRNAME:-"grub"}
## Internationalization (default : english)
export TEXTDOMAIN=grub-btrfs-git
export TEXTDOMAINDIR="/usr/share/locale"
## hints string
hs_boot=$(${grub_probe} --target="hints_string" "/boot" 2>/dev/null)
## UUID of the boot partition
boot_uuid=$(${grub_probe} --target="fs_uuid" "/boot" 2>/dev/null)
## Type filesystem of boot partition
## Probe info "Boot partition"
# Boot device
boot_device=$(${grub_probe} --target=device "/boot")
# hints string
boot_hs=$(${grub_probe} --device "${boot_device}" --target="hints_string" 2>/dev/null)
# UUID of the boot partition
boot_uuid=$(${grub_probe} --device "${boot_device}" --target="fs_uuid" 2>/dev/null)
# Type filesystem of boot partition
boot_fs=$(${grub_probe} --target="fs" "/boot" 2>/dev/null)
## UUID of the root partition
root_uuid=$(${grub_probe} "/" --target="fs_uuid" 2>/dev/null)
## Probe info "Root partition"
# Root device
root_device=$(${grub_probe} --target=device "/")
# UUID of the root partition
root_uuid=$(${grub_probe} --device "${root_device}" --target="fs_uuid" 2>/dev/null)
## Parameters passed to the kernel
kernel_parameters="$GRUB_CMDLINE_LINUX $GRUB_CMDLINE_LINUX_DEFAULT"
## Mount point location
@@ -114,12 +120,12 @@ CLASS="--class snapshots --class gnu-linux --class gnu --class os"
oldIFS=$IFS
## Detect uuid requirement (lvm,btrfs...)
check_uuid_required() {
if [ "x${GRUB_DEVICE_UUID}" = "x" ] || [ "x${GRUB_DISABLE_LINUX_UUID}" = "xtrue" ] \
|| ! test -e "/dev/disk/by-uuid/${GRUB_DEVICE_UUID}" \
|| ( test -e "${GRUB_DEVICE}" && uses_abstraction "${GRUB_DEVICE}" lvm ); then
LINUX_ROOT_DEVICE=${GRUB_DEVICE}
if [ "x${root_uuid}" = "x" ] || [ "x${GRUB_DISABLE_LINUX_UUID}" = "xtrue" ] \
|| ! test -e "/dev/disk/by-uuid/${root_uuid}" \
|| ( test -e "${root_device}" && uses_abstraction "${root_device}" lvm ); then
LINUX_ROOT_DEVICE=${root_device}
else
LINUX_ROOT_DEVICE=UUID=${GRUB_DEVICE_UUID}
LINUX_ROOT_DEVICE=UUID=${root_uuid}
fi
}
@@ -193,7 +199,7 @@ make_menu_entries()
set gfxpayload=keep
insmod ${boot_fs}
if [ x\$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root ${hs_boot} ${boot_uuid}
search --no-floppy --fs-uuid --set=root ${boot_hs} ${boot_uuid}
else
search --no-floppy --fs-uuid --set=root ${boot_uuid}
fi

3
41_snapshots-btrfs_config
View File

@@ -14,5 +14,6 @@
# GRUB_BTRFS_IGNORE_SPECIFIC_PATH=("var/lib/docker") # Ignore specific path during run "grub-mkconfig"
# GRUB_BTRFS_SNAPPER_CONFIG="root" # Snapper's config name to use
# GRUB_BTRFS_DISABLE="false" # Disable Grub-btrfs
# GRUB_BTRFS_DIRNAME=grub # Might be grub2 on some systems ex. /boot/grub2/...
# GRUB_BTRFS_DIRNAME=grub # Might be grub2 on some systems ex. /boot/grub2/...
# GRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION="false" # Change to "true" if you have a boot partition in a different subvolume
# GRUB_BTRFS_MKCONFIG=grub-mkconfig # Might be 'grub2-mkconfig' on some systems

4
README.md
View File

@@ -93,6 +93,10 @@ Add this lines to /etc/default/grub:
* GRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION="false"
(Change to "true" if you have a boot partition in a different subvolume)
* GRUB_BTRFS_MKCONFIG=grub-mkconfig
(Name or path of the 'grub-mkconfig' executable; this is 'grub2-mkconfig' on some systems)
Generate grub.cfg (on Arch linux use grub-mkconfig -o /boot/grub/grub.cfg )
grub-btrfs automatically generates snapshots entries.

9
grub-btrfs.service
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@@ -3,8 +3,9 @@ Description=Regenerate grub-btrfs.cfg
[Service]
Type=oneshot
#Inital setup
# Set the possible paths for `grub-mkconfig`
Environment="PATH=/sbin:/bin:/usr/sbin:/usr/bin"
# Load environment variables from the configuration
EnvironmentFile=/etc/grub.d/41_snapshots-btrfs_config
ExecStartPre=-/bin/bash -c '[ ! -f "/boot/${GRUB_BTRFS_DIRNAME:-grub}/grub-btrfs.cfg" ] && grub2-mkconfig -o /boot/${GRUB_BTRFS_DIRNAME:-grub}/grub.cfg'
#Regenerate grub-btrfs.cfg instead of the whole grub menu
ExecStart=/etc/grub.d/41_snapshots-btrfs
# Regenerate just '/boot/grub/grub-btrfs.cfg' if it exists and is not empty, else regenerate the whole grub menu
ExecStart=/bin/bash -c 'if [ -s "/boot/${GRUB_BTRFS_DIRNAME:-grub}/grub-btrfs.cfg" ]; then /etc/grub.d/41_snapshots-btrfs; else ${GRUB_BTRFS_MKCONFIG:-/usr/bin/grub-mkconfig} -o /boot/${GRUB_BTRFS_DIRNAME:-grub}/grub.cfg; fi'