Adds missing newline

* Adds missing newline:
  "\n" was missing.

41_snapshots-btrfs

@@ -1,6 +1,5 @@
 #! /usr/bin/env bash
 #
-#
 # Written by: Antynea
 # BTC donation address: 1Lbvz244WA8xbpHek9W2Y12cakM6rDe5Rt
 # Github: https://github.com/Antynea/grub-btrfs
@@ -21,7 +20,7 @@
 # - Automatically generate grub.cfg if you use the provided systemd service.
 #
 # Installation:
-# - Run `make install` or look into Makefile for instructions on where to put each file.
+# - Refer to https://github.com/Antynea/grub-btrfs#installation-
 #
 # Customization:
 #  You have the possibility to modify many parameters in /etc/default/grub-btrfs/config.
@@ -37,25 +36,34 @@
 
 set -e
 
-prefix="/usr"
-exec_prefix="/usr"
 datarootdir="/usr/share"
 sysconfdir="/etc"
 grub_btrfs_config="${sysconfdir}/default/grub-btrfs/config"
 
 [[ -f "$grub_btrfs_config" ]] && . "$grub_btrfs_config"
-. "$datarootdir/grub/grub-mkconfig_lib"
+[[ -f "${sysconfdir}/default/grub" ]] && . "${sysconfdir}/default/grub"
-. "${sysconfdir}/default/grub"
+
+## Exit the script, if:
+disable_script() {
+    # Disable Grub-btrfs is set to true (default=false)
+    [[ "${GRUB_BTRFS_DISABLE:-"false"}" == "true" ]] && return 1
+    # btrfs-progs isn't installed
+    if ! type btrfs >/dev/null 2>&1; then return 1; fi
+    # grub-mkconfig_lib couldn't be found
+    [[ -f "$datarootdir/grub/grub-mkconfig_lib" ]] && . "$datarootdir/grub/grub-mkconfig_lib" || return 1
+    # Root filesystem isn't btrfs
+    root_fs=$(${grub_probe} --target="fs" / 2>/dev/null)
+    [[ "$root_fs" != "btrfs" ]] && return 1
+    return 0
+}
+disable_script
 
-### Variables in /etc/default/grub-btrfs/config
-## Disable Grub-btrfs (default=active)
-[[ "${GRUB_BTRFS_DISABLE:-"false"}" == "true" ]] && exit 0
 ## Submenu name
 distro=$(awk -F "=" '/^NAME=/ {gsub(/"/, "", $2); print $2}' /etc/os-release)
 submenuname=${GRUB_BTRFS_SUBMENUNAME:-"${distro:-Linux} snapshots"}
 ## Prefix entry
 prefixentry=${GRUB_BTRFS_PREFIXENTRY:-"Snapshot:"}
-## Limit snapshots to show in the Grub menu
+## Limit snapshots to show in the Grub menu (default=50)
 limit_snap_show="${GRUB_BTRFS_LIMIT:-50}"
 ## How to sort snapshots list
 btrfssubvolsort=(--sort="${GRUB_BTRFS_SUBVOLUME_SORT:-"-rootid"}")
@@ -72,31 +80,24 @@ case "${GRUB_BTRFS_DISABLE_PROTECTION_SUBMENU:-"false"}" in
     *)      unrestricted_access_submenu=""
 esac
 # Authorized users (--users foo,bar)
-if [ ! -z "${GRUB_BTRFS_PROTECTION_AUTHORIZED_USERS}" ] ; then
+if [ -n "${GRUB_BTRFS_PROTECTION_AUTHORIZED_USERS}" ] ; then
     protection_authorized_users="--users ${GRUB_BTRFS_PROTECTION_AUTHORIZED_USERS} "
 fi
 
-### variables script
+## Probe informations of Root and Boot devices
-## Probe info "Boot partition"
+# Probe info "Root partition"
-# Boot device
+root_device=$(${grub_probe} --target=device /) # Root device
-boot_device=$(${grub_probe} --target=device ${boot_directory})
+root_uuid=$(${grub_probe} --device ${root_device} --target="fs_uuid" 2>/dev/null) # UUID of the root device
-# hints string
+# Probe info "Boot partition"
-boot_hs=$(${grub_probe} --device ${boot_device} --target="hints_string" 2>/dev/null)
+boot_device=$(${grub_probe} --target=device ${boot_directory}) # Boot device
-# UUID of the boot partition
+boot_uuid=$(${grub_probe} --device ${boot_device} --target="fs_uuid" 2>/dev/null) # UUID of the boot device
-boot_uuid=$(${grub_probe} --device ${boot_device} --target="fs_uuid" 2>/dev/null)
+boot_hs=$(${grub_probe} --device ${boot_device} --target="hints_string" 2>/dev/null) # hints string
-# Type filesystem of boot partition
+boot_fs=$(${grub_probe} --device ${boot_device} --target="fs" 2>/dev/null) # Type filesystem of boot device
-boot_fs=$(${grub_probe} --device ${boot_device} --target="fs" 2>/dev/null)
+
-## Probe info "Root partition"
-# Type filesystem of root partition
-root_fs=$(${grub_probe} --target="fs" / 2>/dev/null)
-# Root device
-root_device=$(${grub_probe} --target=device /)
-# UUID of the root partition
-root_uuid=$(${grub_probe} --device ${root_device} --target="fs_uuid" 2>/dev/null)
 ## Parameters passed to the kernel
 kernel_parameters="$GRUB_CMDLINE_LINUX $GRUB_CMDLINE_LINUX_DEFAULT"
 ## Mount point location
-gbgmp=$(mktemp -d)
+gbgmp=$(mktemp -dt grub-btrfs.XXXXXXXXXX)
 ## Class for theme
 CLASS="--class snapshots --class gnu-linux --class gnu --class os"
 ## save IFS
@@ -118,32 +119,54 @@ detect_rootflags()
                         | sed -E 's/^.*[[:space:]]([[:graph:]]+)$/\1/;s/,?subvol(id)?=[^,$]+//g;s/^,//')
     rootflags="rootflags=${fstabflags:+$fstabflags,}${GRUB_BTRFS_ROOTFLAGS:+$GRUB_BTRFS_ROOTFLAGS,}"
 }
+## Path to grub-script-check
+grub_script_check="${bindir}/grub-script-check"
 
-### Error Handling
+## Error Handling
 print_error()
 {
-    local arg="$@"
+    local err_msg="$*"
-    local nothing_to_do="If you think an error has occurred , please file a bug report at \" https://github.com/Antynea/grub-btrfs \"\nNothing to do. Abort.\n"
+    local bug_report="If you think an error has occurred , please file a bug report at \" https://github.com/Antynea/grub-btrfs \""
-    printf "${arg}\n${nothing_to_do}" >&2 ;
+    printf "%s\n" "${err_msg}" "${bug_report}" >&2 ;
     exit 0
 }
 
-test_btrfs()
+unmount_gbgmp()
 {
-    [[ "$root_fs" != "btrfs" ]] && print_error "Root partition isn't a btrfs filesystem.\nThis script only supports snapshots of the btrfs filesystem."
+if [[ -d "$gbgmp" ]]; then
-    set +e
+    local wait=true
-    type btrfs >/dev/null 2>&1
+    local wait_max=0
-    if [[ $? -ne 0 ]]; then
+    printf "Unmount %s .." "$gbgmp" >&2;
-        print_error "Unable to retrieve info from btrfs filesystem, make sure you have btrfs-progs on your system."
+    while $wait; do
+        if grep -qs "$gbgmp" /proc/mounts; then
+            wait_max=$((1+$wait_max))
+            if umount "$gbgmp" >/dev/null 2>&1; then
+                wait=false # umount successful
+                printf " Success\n" >&2;
+            elif [[ $wait_max = 10 ]]; then 
+                printf "\nWarning: Unable to unmount %s in %s\n" "$root_device" "$gbgmp" >&2;
+                break;
+            else
+                printf "." >&2 ; # output to show that the script is alive
+                sleep 2 # wait 2 seconds before retry
+            fi
+        else
+            wait=false # not mounted
+            printf " Success\n" >&2;
+        fi
+    done
+    if [[ "$wait" != true ]]; then
+        if ! rm -d "$gbgmp" >/dev/null 2>&1; then
+            printf "Unable to delete %s: Device or ressource is busy\n" "$gbgmp" >&2;
+        fi
     fi
-    set -e
+fi
 }
 
-### Script
 ## Create entry
 entry()
 {
-echo "$@" >> "$grub_directory/grub-btrfs.cfg"
+echo "$@" >> "$grub_directory/grub-btrfs.new"
 }
 
 ## menu entries
@@ -156,24 +179,24 @@ make_menu_entries()
         [[ ! -f "${boot_dir}"/"${k}" ]] && continue;
         kversion=${k#*"-"}
         for i in "${name_initramfs[@]}"; do
-            prefix_i=${i%%"-"*}
+            if [[ "${name_initramfs}" != "x" ]] ; then
-            suffix_i=${i#*"-"}
+                prefix_i=${i%%"-"*}
-            alt_suffix_i=${i##*"-"}
+                suffix_i=${i#*"-"}
-            if   [ "${kversion}" = "${suffix_i}" ];                 then i="${i}";
+                alt_suffix_i=${i##*"-"}
-            elif [ "${kversion}.img" = "${suffix_i}" ];             then i="${i}";
+                if   [ "${kversion}" = "${suffix_i}" ];                 then i="${i}";
-            elif [ "${kversion}-fallback.img" = "${suffix_i}" ];    then i="${i}";
+                elif [ "${kversion}.img" = "${suffix_i}" ];             then i="${i}";
-            elif [ "${kversion}.gz" = "${suffix_i}" ];              then i="${i}";
+                elif [ "${kversion}-fallback.img" = "${suffix_i}" ];    then i="${i}";
-            else continue ;
+                elif [ "${kversion}.gz" = "${suffix_i}" ];              then i="${i}";
-            fi
+                fi
-            for u in "${name_microcode[@]}"; do
+                for u in "${name_microcode[@]}"; do
-                if [[ "${name_microcode}" != "x" ]] ; then
+                    if [[ "${name_microcode}" != "x" ]] ; then
                     entry "
     menuentry '"${k}" & "${i}" & "${u}"' ${CLASS} "\$menuentry_id_option" 'gnulinux-snapshots-$boot_uuid' {"
-                else
+                    else
                     entry "
     menuentry '"${k}" & "${i}"' ${CLASS} "\$menuentry_id_option" 'gnulinux-snapshots-$boot_uuid' {"
-                fi
+                    fi
-                entry "\
+                    entry "\
         if [ x\$feature_all_video_module = xy ]; then
         insmod all_video
         fi
@@ -187,18 +210,50 @@ make_menu_entries()
         echo 'Loading Snapshot: "${snap_date_time}" "${snap_dir_name}"'
         echo 'Loading Kernel: "${k}" ...'
         linux \"${boot_dir_root_grub}/"${k}"\" root="${LINUX_ROOT_DEVICE}" ${kernel_parameters} ${rootflags}subvol=\""${snap_dir_name}"\""
-                if [[ "${name_microcode}" != "x" ]] ; then
+                    if [[ "${name_microcode}" != "x" ]] ; then
-                    entry "\
+                        entry "\
         echo 'Loading Microcode & Initramfs: "${u}" "${i}" ...'
         initrd \"${boot_dir_root_grub}/"${u}"\" \"${boot_dir_root_grub}/"${i}"\""
-                else
+                    else
-                    entry "\
+                        entry "\
         echo 'Loading Initramfs: "${i}" ...'
         initrd \"${boot_dir_root_grub}/"${i}"\""
-                fi
+                    fi
-                entry "    }"
+                    entry "    }"
-                count_warning_menuentries=$((1+$count_warning_menuentries))
+                    count_warning_menuentries=$((1+$count_warning_menuentries))
-            done
+                done
+            else 
+                for u in "${name_microcode[@]}"; do
+                    if [[ "${name_microcode}" != "x" ]] ; then
+                    entry "
+    menuentry '"${k}" & "${u}"' ${CLASS} "\$menuentry_id_option" 'gnulinux-snapshots-$boot_uuid' {"
+                    else
+                    entry "
+    menuentry '"${k}"' ${CLASS} "\$menuentry_id_option" 'gnulinux-snapshots-$boot_uuid' {"
+                    fi
+                    entry "\
+        if [ x\$feature_all_video_module = xy ]; then
+        insmod all_video
+        fi
+        set gfxpayload=keep
+        insmod ${boot_fs}
+        if [ x\$feature_platform_search_hint = xy ]; then
+            search --no-floppy --fs-uuid  --set=root ${boot_hs} ${boot_uuid}
+        else
+            search --no-floppy --fs-uuid  --set=root ${boot_uuid}
+        fi
+        echo 'Loading Snapshot: "${snap_date_time}" "${snap_dir_name}"'
+        echo 'Loading Kernel: "${k}" ...'
+        linux \"${boot_dir_root_grub}/"${k}"\" root="${LINUX_ROOT_DEVICE}" ${kernel_parameters} ${rootflags}subvol=\""${snap_dir_name}"\""
+                    if [[ "${name_microcode}" != "x" ]] ; then
+                        entry "\
+        echo 'Loading Microcode: "${u}" ...'
+        initrd \"${boot_dir_root_grub}/"${u}"\""
+                    fi
+                    entry "    }"
+                    count_warning_menuentries=$((1+$count_warning_menuentries))
+                done
+            fi
         done
     done
     entry  "}"
@@ -216,17 +271,16 @@ trim() {
 snapshot_list()
 {
     # Query info from snapper if it is installed
-    type snapper >/dev/null 2>&1
+    if type snapper >/dev/null 2>&1; then
-    if [ $? -eq 0 ]; then
         if [ -s "/etc/snapper/configs/$snapper_config" ]; then
-            printf "Info: snapper detected, using config '$snapper_config'\n" >&2
+            printf "Info: snapper detected, using config: %s\n" "$snapper_config" >&2
             local snapper_ids=($(snapper --no-dbus -t 0 -c "$snapper_config" list --disable-used-space | tail -n +3 | cut -d'|' -f 1))
             local snapper_types=($(snapper --no-dbus -t 0 -c "$snapper_config" list --disable-used-space | tail -n +3 | cut -d'|' -f 2))
 
             IFS=$'\n'
             local snapper_descriptions=($(snapper --no-dbus -t 0 -c "$snapper_config" list --disable-used-space | tail -n +3 | rev | cut -d'|' -f 2 | rev))
         else
-            printf "Warning: snapper detected but config '$snapper_config' does not exist\n" >&2
+            printf "Warning: snapper detected but config: %s does not exist\n" "$snapper_config" >&2
         fi
     fi
 
@@ -246,12 +300,12 @@ snapshot_list()
         [[ ${snap_path_name%%"/"*} == "<FS_TREE>" ]] && snap_path_name=${snap_path_name#*"/"}
 
         # ignore specific path during run "grub-mkconfig"
-        if [ ! -z "${GRUB_BTRFS_IGNORE_SPECIFIC_PATH}" ] ; then
+        if [ -n "${GRUB_BTRFS_IGNORE_SPECIFIC_PATH}" ] ; then
             for isp in ${GRUB_BTRFS_IGNORE_SPECIFIC_PATH[@]} ; do
                 [[ "${snap_path_name}" == "${isp}" ]] && continue 2;
             done
         fi
-        if [ ! -z "${GRUB_BTRFS_IGNORE_PREFIX_PATH}" ] ; then
+        if [ -n "${GRUB_BTRFS_IGNORE_PREFIX_PATH}" ] ; then
             for isp in ${GRUB_BTRFS_IGNORE_PREFIX_PATH[@]} ; do
                 [[ "${snap_path_name}" == "${isp}"/* ]] && continue 2;
             done
@@ -296,6 +350,18 @@ snapshot_list()
             if [[ "$snapper_id" == "$id" ]]; then
                 local snapper_type=$(trim "${snapper_types[$j]}")
                 local snapper_description=$(trim "${snapper_descriptions[$j]}")
+                
+                # ignore snapper_type or snapper_description during run "grub-mkconfig"
+                if [ -n "${GRUB_BTRFS_IGNORE_SNAPPER_TYPE}" ] ; then
+                    for ist in ${GRUB_BTRFS_IGNORE_SNAPPER_TYPE[@]} ; do
+                        [[ "${snapper_type}" == "${ist}" ]] && continue 3;
+                    done
+                fi
+                if [ -n "${GRUB_BTRFS_IGNORE_SNAPPER_DESCRIPTION}" ] ; then
+                    for isd in ${GRUB_BTRFS_IGNORE_SNAPPER_DESCRIPTION[@]} ; do
+                        [[ "${snapper_description}" == "${isd}" ]] && continue 3;
+                    done
+                fi
                 printf -v entry "%-${max_entry_length}s | %-${max_type_length}s | %s" "$entry" "$snapper_type" "$snapper_description"
                 break
             fi
@@ -319,7 +385,7 @@ detect_kernel()
     done
 
     # Custom name kernel in GRUB_BTRFS_NKERNEL
-    if [ ! -z "${GRUB_BTRFS_NKERNEL}" ] ; then
+    if [ -n "${GRUB_BTRFS_NKERNEL}" ] ; then
         for ckernel in "${boot_dir}/${GRUB_BTRFS_NKERNEL[@]}" ; do
             [[ ! -f "${ckernel}" ]] && continue;
             list_kernel+=("$ckernel")
@@ -342,12 +408,13 @@ detect_initramfs()
     done
 
     # Custom name initramfs in GRUB_BTRFS_NINIT
-    if [ ! -z "${GRUB_BTRFS_NINIT}" ] ; then
+    if [ -n "${GRUB_BTRFS_NINIT}" ] ; then
         for cinitramfs in "${boot_dir}/${GRUB_BTRFS_NINIT[@]}" ; do
             [[ ! -f "${cinitramfs}" ]] && continue;
             list_initramfs+=("$cinitramfs")
         done
     fi
+    if [ -z "${list_initramfs}" ]; then list_initramfs=(x); fi
 }
 
 ## Detect microcode in "/boot"
@@ -367,7 +434,7 @@ detect_microcode()
     done
 
     # Custom name microcode in GRUB_BTRFS_CUSTOM_MICROCODE
-    if [ ! -z "${GRUB_BTRFS_CUSTOM_MICROCODE}" ] ; then
+    if [ -n "${GRUB_BTRFS_CUSTOM_MICROCODE}" ] ; then
         for cucode in "${boot_dir}/${GRUB_BTRFS_CUSTOM_MICROCODE[@]}" ; do
             [[ ! -f "${cucode}" ]] && continue
             list_ucode+=("$cucode")
@@ -424,7 +491,6 @@ boot_bounded()
         detect_rootflags
         # Initramfs (Original + custom initramfs)
         detect_initramfs
-        if [ -z "${list_initramfs}" ]; then continue; fi
         name_initramfs=("${list_initramfs[@]##*"/"}")
         # microcode (auto-detect + custom microcode)
         detect_microcode
@@ -444,11 +510,10 @@ boot_bounded()
         ### Limit snapshots found during run "grub-mkconfig"
         count_limit_snap=$((1+$count_limit_snap))
         [[ $count_limit_snap -ge $limit_snap_show ]] && break;
-        # Limit generation of menuentries if exceeds 250
-        # [[ $count_warning_menuentries -ge 250 ]] && break;
     done
     IFS=$oldIFS
 }
+
 boot_separate()
 {
     boot_dir="${boot_directory}"
@@ -461,7 +526,6 @@ boot_separate()
     name_kernel=("${list_kernel[@]##*"/"}")
     # Initramfs (Original + custom initramfs)
     detect_initramfs
-    if [ -z "${list_initramfs}" ]; then print_error "Initramfs not found."; fi
     name_initramfs=("${list_initramfs[@]##*"/"}")
     # microcode (auto-detect + custom microcode)
     detect_microcode
@@ -492,22 +556,17 @@ boot_separate()
         # Limit snapshots found during run "grub-mkconfig"
         count_limit_snap=$((1+$count_limit_snap))
         [[ $count_limit_snap -ge $limit_snap_show ]] && break;
-        # Limit generation of menuentries if exceeds 250
-        # [[ $count_warning_menuentries -ge 250 ]] && break;
     done
     IFS=$oldIFS
 }
 
-### Start
 printf "Detecting snapshots ...\n" >&2 ;
-# Only support btrfs snapshots
+rm -f "$grub_directory/grub-btrfs.new"
-test_btrfs
+> "$grub_directory/grub-btrfs.new"
-# Delete existing config
-#rm -f --preserve-root "$grub_directory/grub-btrfs.cfg"
-> "$grub_directory/grub-btrfs.cfg"
 # Create mount point then mounting
-[[ ! -d $gbgmp ]] && mkdir -p $gbgmp
+[[ ! -d $gbgmp ]] && mkdir -p "$gbgmp"
-mount -o subvolid=5 /dev/disk/by-uuid/$root_uuid $gbgmp/
+mount -o ro,subvolid=5 /dev/disk/by-uuid/"$root_uuid" "$gbgmp/"
+trap "unmount_gbgmp" EXIT # unmounting mount point on EXIT signal
 # Count menuentries
 count_warning_menuentries=0
 # Count snapshots
@@ -527,23 +586,25 @@ else
         boot_bounded
     fi
 fi
-# unmounting mount point
-umount $gbgmp
 # Show warn, menuentries exceeds 250 entries
-[[ $count_warning_menuentries -ge 250 ]] && printf "Generated ${count_warning_menuentries} total GRUB entries. You might experience issues loading snapshots menu in GRUB.\n" >&2 ;
+[[ $count_warning_menuentries -ge 250 ]] && printf "Generated %s total GRUB entries. You might experience issues loading snapshots menu in GRUB.\n" "${count_warning_menuentries}" >&2 ;
-# printf "menuentries = $count_warning_menuentries \n" >&2 ;
 # Show total found snapshots
-if [[ "${GRUB_BTRFS_SHOW_TOTAL_SNAPSHOTS_FOUND:-"true"}" = "true" && ! -z "${count_limit_snap}" && "${count_limit_snap}" != "0" ]]; then
+if [[ "${GRUB_BTRFS_SHOW_TOTAL_SNAPSHOTS_FOUND:-"true"}" = "true" && -n "${count_limit_snap}" && "${count_limit_snap}" != "0" ]]; then
-    printf "Found ${count_limit_snap} snapshot(s)\n" >&2 ;
+    printf "Found %s snapshot(s)\n" "${count_limit_snap}" >&2 ;
 fi
 # if no snapshot found, exit
 if [[ "${count_limit_snap}" = "0" || -z "${count_limit_snap}" ]]; then
     print_error "No snapshots found."
 fi
-# Make a submenu in GRUB (grub.cfg)
+# Make a submenu in GRUB (grub.cfg) and move "grub-btrfs.new" to "grub-btrfs.cfg"
-cat << EOF
+if ${grub_script_check} "$grub_directory/grub-btrfs.new"; then
+    cat "$grub_directory/grub-btrfs.new" > "$grub_directory/grub-btrfs.cfg"
+    rm -f "$grub_directory/grub-btrfs.new"
+    cat << EOF
 submenu '${submenuname}' ${protection_authorized_users}${unrestricted_access_submenu}{
     configfile "\${prefix}/grub-btrfs.cfg"
 }
 EOF
-### End
+else
+    print_error "Syntax errors are detected in generated grub-btrfs.cfg file."
+fi

README.md

@@ -33,7 +33,7 @@ Refer to the [documentation](https://github.com/Antynea/grub-btrfs/blob/master/i
 ##
 ### Installation :
 #### Arch Linux
-
+The package is available in the community repository [grub-btrfs](https://archlinux.org/packages/community/any/grub-btrfs/)
 ```
 pacman -S grub-btrfs
 ```
@@ -41,10 +41,13 @@ pacman -S grub-btrfs
 #### Manual
 
 * Run `make install` or look into Makefile for instructions on where to put each file.
+* Dependencies:
+  * [btrfs-progs](https://archlinux.org/packages/core/x86_64/btrfs-progs/)
+  * [grub](https://archlinux.org/packages/core/x86_64/grub/)
 
 NOTE: Generate your Grub menu after installation for the changes to take effect.  
-On Arch Linux use `grub-mkconfig -o /boot/grub/grub.cfg`.
+On Arch Linux use `grub-mkconfig -o /boot/grub/grub.cfg`.  
-
+On Debian-like distribution `update-grub` is an alias to `grub-mkconfig ...`
 ##
 ### Customization :
 

config

@@ -74,6 +74,15 @@ GRUB_BTRFS_IGNORE_SPECIFIC_PATH=("@")
 # Default: ("var/lib/docker" "@var/lib/docker" "@/var/lib/docker")
 GRUB_BTRFS_IGNORE_PREFIX_PATH=("var/lib/docker" "@var/lib/docker" "@/var/lib/docker")
 
+# Ignore specific type of snapper's snapshot during run "grub-mkconfig".
+# Type = single, pre, post.
+# Default: ("")
+GRUB_BTRFS_IGNORE_SNAPPER_TYPE=("")
+
+# Ignore specific description of snapper's snapshot during run "grub-mkconfig".
+# Default: ("")
+GRUB_BTRFS_IGNORE_SNAPPER_DESCRIPTION=("")
+
 # By default "grub-btrfs" automatically detects your boot partition,
 # either located at the system root or on a separate partition,
 # but cannot detect if it is in a subvolume.