grub-btrfs: Add possibility to configure where grub-btrfs.cfg is created and searched for

Closes #187 Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>
2026-03-04 13:05:00 +08:00 · 2022-11-26 10:55:01 +01:00
parent 1d760ad730
commit bfad9dcc1d
4 changed files with 124 additions and 53 deletions
--- a/22
+++ b/22
@@ -91,6 +91,10 @@ btrfs_subvolume_sort="--sort=${GRUB_BTRFS_SUBVOLUME_SORT:-"-rootid"}"
 grub_directory=${GRUB_BTRFS_GRUB_DIRNAME:-"/boot/grub"}
 ## Customize BOOT directory, where kernels/initrams/microcode is saved.
 boot_directory=${GRUB_BTRFS_BOOT_DIRNAME:-"/boot"}
+## Customize GRUB-BTRFS.cfg directory, where "grub-btrfs.cfg" file is saved
+grub_btrfs_directory=${GRUB_BTRFS_GBTRFS_DIRNAME:-"/boot/grub"}
+## Customize directory where "grub-btrfs.cfg" file is searched for by grub
+grub_btrfs_search_directory=${GRUB_BTRFS_GBTRFS_SEARCH_DIRNAME:-"\${prefix}"}
 ## Password protection management for submenu
 # Protection support for submenu (--unrestricted)
 case "${GRUB_BTRFS_DISABLE_PROTECTION_SUBMENU,,}" in
@@ -177,7 +181,7 @@ fi
 ## Create entry
 entry()
 {
-    echo "$@" >> "$grub_directory/grub-btrfs.new"
+    echo "$@" >> "$grub_btrfs_directory/grub-btrfs.new"
 }

 ## menu entries
@@ -494,7 +498,7 @@ header_menu()
            local lenght_title_column_right=$(((${#var}-lenght_title_column_left)+1)) #+1 is necessary for extra "|" character
            header_entry+=$(printf "%${lenght_title_column_left}s%${lenght_title_column_right}s" "${title_column[${GRUB_BTRFS_TITLE_FORMAT[$key],,}]}" "|") # Final "|" is for visuals only
        done
-    sed -i "1imenuentry '|${header_entry}' { echo }" "$grub_directory/grub-btrfs.new" # First "|" is for visuals only
+    sed -i "1imenuentry '|${header_entry}' { echo }" "$grub_btrfs_directory/grub-btrfs.new" # First "|" is for visuals only
 }

 ## List of kernels, initramfs and microcode in snapshots
@@ -561,8 +565,8 @@ boot_separate()
    IFS=$oldIFS
 }

-rm -f "$grub_directory/grub-btrfs.new"
-> "$grub_directory/grub-btrfs.new" # Create a "grub-btrfs.new" file in "grub_directory"
+rm -f "$grub_btrfs_directory/grub-btrfs.new"
+> "$grub_btrfs_directory/grub-btrfs.new" # Create a "grub-btrfs.new" file in "grub_btrfs_directory"
 # Create mount point then mounting
 [[ ! -d $grub_btrfs_mount_point ]] && mkdir -p "$grub_btrfs_mount_point"
 mount -o ro,subvolid=5 /dev/disk/by-uuid/"$root_uuid" "$grub_btrfs_mount_point/"
@@ -585,16 +589,16 @@ if [[ "${count_limit_snap}" = "0" || -z "${count_limit_snap}" ]]; then
 fi
 # Make a submenu in GRUB (grub.cfg) and move "grub-btrfs.new" to "grub-btrfs.cfg"
 header_menu
-if "${bindir}/${GRUB_BTRFS_SCRIPT_CHECK:-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"
+if "${bindir}/${GRUB_BTRFS_SCRIPT_CHECK:-grub-script-check}" "$grub_btrfs_directory/grub-btrfs.new"; then
+    cat "$grub_btrfs_directory/grub-btrfs.new" > "$grub_btrfs_directory/grub-btrfs.cfg"
+    rm -f "$grub_btrfs_directory/grub-btrfs.new"
    cat << EOF
 submenu '${submenuname}' ${protection_authorized_users}${unrestricted_access_submenu}{
-    configfile "\${prefix}/grub-btrfs.cfg"
+    configfile "${grub_btrfs_search_directory}/grub-btrfs.cfg"
 }
 EOF
 else
-    print_error "Syntax errors were detected in generated ${grub_directory}/grub-btrfs.new file. Old grub-btrfs.cfg (if present) was not replaced."
+    print_error "Syntax errors were detected in generated ${grub_btrfs_directory}/grub-btrfs.new file. Old grub-btrfs.cfg (if present) was not replaced."
 fi

 # warn when this script is run but there is no entry in grub.cfg
--- a/20
+++ b/20
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash

-GRUB_BTRFS_VERSION=4.12-20221123
+GRUB_BTRFS_VERSION=4.12-make-prefix-configurable-2022-11-26T14:14:00+00:00

 # Disable grub-btrfs.
 # Default: "false"
@@ -99,6 +99,24 @@ GRUB_BTRFS_IGNORE_PREFIX_PATH=("var/lib/docker" "@var/lib/docker" "@/var/lib/doc
 # Default: "/boot"
 #GRUB_BTRFS_BOOT_DIRNAME="/boot"

+# Location where grub-btrfs.cfg should be saved.
+# Some distributions (like OpenSuSE) store those file at the snapshot directory
+# instead of boot. Be aware that this direcory must be available for grub during
+# startup of the system.
+# Default: "/boot/grub"
+#GRUB_BTRFS_GBTRFS_DIRNAME="/boot/grub"
+
+# Location of the directory where Grub searches for the grub-btrfs.cfg file.
+# Some distributions (like OpenSuSE) store those file at the snapshot directory
+# instead of boot. Be aware that this direcory must be available for grub during
+# startup of the system.
+# Default: "\${prefix}" # This is a grub variable that resolves to where grub is
+# installed. (like /boot/grub, /boot/efi/grub)
+# NOTE: If variables of grub are used here (like ${prefix}) they need to be escaped
+# with `\` before the `$`
+#GRUB_BTRFS_GBTRFS_SEARCH_DIRNAME="\${prefix}"
+
+
 # Name/path of grub-mkconfig command, use by "grub-btrfs.service"
 # Might be 'grub2-mkconfig' on some systems (Fedora ...)
 # Default paths are /sbin:/bin:/usr/sbin:/usr/bin,
--- a/manpages/grub-btrfs.8.man
+++ b/manpages/grub-btrfs.8.man
@@ -48,16 +48,16 @@ Example: \fCGRUB_BTRFS_DISABLE="true"\fP
 The snapshot entries submenu in Grub are added according to this line. It is possible to change to order of the fields.
 .IP \(em 4
 Default: (“date” “snapshot” “type” “description”)
-.PP
-Example: \fCGRUB_BTRFS_TITLE_FORMAT=("date" "snapshot" "type" "description")\fP
+.IP \(em 4
+Example: \fCGRUB_BTRFS_TITLE_FORMAT=("date" "snapshot" "type" "description")\fP

 .SS "\fCGRUB_BTRFS_LIMIT\fP"
 .PP
 Maximum number of snapshots in the GRUB snapshots sub menu.
 .IP \(em 4
 Default: “50”
-.PP
-Example: \fCGRUB_BTRFS_LIMIT="50"\fP
+.IP \(em 4
+Example: \fCGRUB_BTRFS_LIMIT="50"\fP

 .SS "\fCGRUB_BTRFS_SUBVOLUME_SORT\fP"
 .PP
@@ -69,16 +69,16 @@ See Sorting section in
 “-rootid” means list snapshot by new ones first.
 .IP \(em 4
 Default: “-rootid”
-.PP
-Example: \fCGRUB_BTRFS_SUBVOLUME_SORT="+ogen,\-gen,path,rootid"\fP
+.IP \(em 4
+Example: \fCGRUB_BTRFS_SUBVOLUME_SORT="+ogen,\-gen,path,rootid"\fP

 .SS "\fCGRUB_BTRFS_SHOW_SNAPSHOTS_FOUND\fP"
 .PP
 Show snapshots found during run “grub-mkconfig”
 .IP \(em 4
 Default: “true”
-.PP
-Example: \fCGRUB_BTRFS_SHOW_SNAPSHOTS_FOUND="false"\fP
+.IP \(em 4
+Example: \fCGRUB_BTRFS_SHOW_SNAPSHOTS_FOUND="false"\fP

 .SS "\fCGRUB_BTRFS_ROOTFLAGS\fP"
 .PP
@@ -89,8 +89,8 @@ takes priority over `fstab` entries.
 NB: Do NOT include “subvol=...” or “subvolid=...” here.
 .IP \(em 4
 Default: “”
-.PP
-Example: \fCGRUB_BTRFS_ROOTFLAGS="space_cache,commit=10,norecovery"\fP
+.IP \(em 4
+Example: \fCGRUB_BTRFS_ROOTFLAGS="space_cache,commit=10,norecovery"\fP

 .SS "\fCGRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION\fP"
 .PP
@@ -99,8 +99,8 @@ either located at the system root or on a separate partition or in a subvolume,
 Change to “true” if your boot partition is not detected as separate.
 .IP \(em 4
 Default: “false”
-.PP
-Example: \fCGRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION="true"\fP
+.IP \(em 4
+Example: \fCGRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION="true"\fP

 .SS "CUSTOM KERNELS"
 .SS "\fCGRUB_BTRFS_NKERNEL\fP / \fCGRUB_BTRFS_NINIT\fP / \fCGRUB_BTRFS_CUSTOM_MICROCODE\fP"
@@ -109,10 +109,10 @@ By default, “grub-btrfs” automatically detects most existing kernels, initra
 Customs kernel, initramfs and microcodes that are not detected can be added in these variables.
 .IP \(em 4
 Default: (“”)
-.PP
-Example: \fCGRUB_BTRFS_NKERNEL=("kernel\-5.19.4\-custom" "vmlinux\-5.19.4\-custom")\fP
-          \fCGRUB_BTRFS_NINIT=("initramfs\-5.19.4\-custom.img" "initrd\-5.19.4\-custom.img" "otherinit\-5.19.4\-custom.gz")\fP
-          \fCGRUB_BTRFS_CUSTOM_MICROCODE=("custom\-ucode.img" "custom\-uc.img "custom_ucode.cpio")\fP
+.IP \(em 4
+Example: \fCGRUB_BTRFS_NKERNEL=("kernel\-5.19.4\-custom" "vmlinux\-5.19.4\-custom")\fP
+\fCGRUB_BTRFS_NINIT=("initramfs\-5.19.4\-custom.img" "initrd\-5.19.4\-custom.img" "otherinit\-5.19.4\-custom.gz")\fP
+\fCGRUB_BTRFS_CUSTOM_MICROCODE=("custom\-ucode.img" "custom\-uc.img "custom_ucode.cpio")\fP

 .SS "SNAPSHOT FILTERING"
 .SS "\fCGRUB_BTRFS_IGNORE_SPECIFIC_PATH\fP"
@@ -122,8 +122,8 @@ Only exact paths are ignored.
 e.g : if `specific path` = @, only `@` snapshot will be ignored.
 .IP \(em 4
 Default: (“@”)
-.PP
-Example: \fCGRUB_BTRFS_IGNORE_SPECIFIC_PATH=("@home")\fP
+.IP \(em 4
+Example: \fCGRUB_BTRFS_IGNORE_SPECIFIC_PATH=("@home")\fP

 .SS "\fCGRUB_BTRFS_IGNORE_PREFIX_PATH\fP"
 .PP
@@ -132,8 +132,8 @@ Any path starting with the specified string will be ignored.
 e.g : if `prefix path` = @, all snapshots beginning with “@/...” will be ignored.
 .IP \(em 4
 Default: (“var/lib/docker” “@var/lib/docker” “@/var/lib/docker”)
-.PP
-Example: \fCGRUB_BTRFS_IGNORE_PREFIX_PATH=("var/lib/docker" "@var/lib/docker" "@/var/lib/docker")\fP
+.IP \(em 4
+Example: \fCGRUB_BTRFS_IGNORE_PREFIX_PATH=("var/lib/docker" "@var/lib/docker" "@/var/lib/docker")\fP

 .SS "\fCGRUB_BTRFS_IGNORE_SNAPSHOT_TYPE\fP"
 .PP
@@ -144,16 +144,16 @@ For Timeshift:
 Tag = boot, ondemand, hourly, daily, weekly, monthly.
 .IP \(em 4
 Default: (“”)
-.PP
-Example: \fCGRUB_BTRFS_IGNORE_SNAPSHOT_TYPE=("ondemand")\fP
+.IP \(em 4
+Example: \fCGRUB_BTRFS_IGNORE_SNAPSHOT_TYPE=("ondemand")\fP

 .SS "\fCGRUB_BTRFS_IGNORE_SNAPSHOT_DESCRIPTION\fP"
 .PP
 Ignore specific description of snapshot during run “grub-mkconfig”.
 .IP \(em 4
 Default: (“”)
-.PP
-Example: \fCGRUB_BTRFS_IGNORE_SNAPSHOT_DESCRIPTION=("timeline")\fP
+.IP \(em 4
+Example: \fCGRUB_BTRFS_IGNORE_SNAPSHOT_DESCRIPTION=("timeline")\fP

 .SS "DISTRIBUTION DEPENDENT SETTINGS"
 .SS "\fCGRUB_BTRFS_BOOT_DIRNAME\fP"
@@ -162,8 +162,8 @@ Location of kernels/initramfs/microcode.
 Used by “grub-btrfs” to detect the boot partition and the location of kernels, initramfs and microcodes.
 .IP \(em 4
 Default: “/boot”
-.PP
-Example: \fCGRUB_BTRFS_BOOT_DIRNAME="/"\fP
+.IP \(em 4
+Example: \fCGRUB_BTRFS_BOOT_DIRNAME="/"\fP

 .SS "\fCGRUB_BTRFS_GRUB_DIRNAME\fP"
 .PP
@@ -173,8 +173,37 @@ Might be grub2 on some systems.
 For example, on Fedora with EFI : “/boot/efi/EFI/fedora”
 .IP \(em 4
 Default: “/boot/grub”
+.IP \(em 4
+Example: \fCGRUB_BTRFS_GRUB_DIRNAME="/boot/grub2"\fP
+
+.SS "\fCGRUB_BTRFS_GBTRFS_DIRNAME\fP"
 .PP
-Example: \fCGRUB_BTRFS_GRUB_DIRNAME="/boot/grub2"\fP
+Location where grub-btrfs.cfg should be saved.
+Some distributions (like OpenSuSE) store those file at the snapshot directory
+instead of boot. Be aware that this direcory must be available for grub during
+startup of the system.
+.IP \(em 4
+Default: “/boot/grub”
+.IP \(em 4
+Example GRUB\d\s-2BTRFS\s+2\u\d\s-2GBTRFS\s+2\u\d\s-2DIRNAME\s+2\u=“/boot/grub”
+
+.SS "\fCGRUB_BTRFS_GBTRFS_SEARCH_DIRNAME\fP"
+.PP
+Location of the directory where Grub searches for the grub-btrfs.cfg file.
+Some distributions (like OpenSuSE) store those file at the snapshot directory
+instead of boot. Be aware that this direcory must be available for grub during
+startup of the system.
+.IP \(em 4
+Default: “\${prefix}” (This is a grub variable that resolves to where grub is
+.PP
+installed. (like /boot/grub, /boot/efi/grub))
+.IP \(em 4
+NOTE: If variables of grub are used here like ${prefix}, they need to be escaped
+.PP
+with `$\` before the `$`
+.IP \(em 4
+Example: GRUB\d\s-2BTRFS\s+2\u\d\s-2GBTRFS\s+2\u\d\s-2SEARCH\s+2\u\d\s-2DIRNAME\s+2\u=“\${prefix}”
+

 .SS "\fCGRUB_BTRFS_MKCONFIG\fP"
 .PP
@@ -184,8 +213,8 @@ Default paths are /sbin:/bin:/usr/sbin:/usr/bin, if your path is missing, report
 You can use the name of the command only or full the path.
 .IP \(em 4
 Default: grub-mkconfig
-.PP
-Example: \fCGRUB_BTRFS_MKCONFIG=/sbin/grub2\-mkconfig\fP
+.IP \(em 4
+Example: \fCGRUB_BTRFS_MKCONFIG=/sbin/grub2\-mkconfig\fP

 .SS "\fCGRUB_BTRFS_SCRIPT_CHECK\fP"
 .PP
--- a/manpages/grub-btrfs.8.org
+++ b/manpages/grub-btrfs.8.org
@@ -35,12 +35,12 @@ Disable grub-btrfs if true.
 *** ~GRUB_BTRFS_TITLE_FORMAT~
 The snapshot entries submenu in Grub are added according to this line. It is possible to change to order of the fields.
 - Default: ("date" "snapshot" "type" "description")
-Example: ~GRUB_BTRFS_TITLE_FORMAT=("date" "snapshot" "type" "description")~
+- Example: ~GRUB_BTRFS_TITLE_FORMAT=("date" "snapshot" "type" "description")~

 *** ~GRUB_BTRFS_LIMIT~
 Maximum number of snapshots in the GRUB snapshots sub menu.
 - Default: "50"
-Example: ~GRUB_BTRFS_LIMIT="50"~
+- Example: ~GRUB_BTRFS_LIMIT="50"~

 *** ~GRUB_BTRFS_SUBVOLUME_SORT~
 Sort the found subvolumes by "ogeneration" or "generation" or "path" or "rootid".
@@ -50,12 +50,12 @@ Sort the found subvolumes by "ogeneration" or "generation" or "path" or "rootid"
 #+END_MAN
 "-rootid" means list snapshot by new ones first.
 - Default: "-rootid"
-Example: ~GRUB_BTRFS_SUBVOLUME_SORT="+ogen,-gen,path,rootid"~
+- Example: ~GRUB_BTRFS_SUBVOLUME_SORT="+ogen,-gen,path,rootid"~

 *** ~GRUB_BTRFS_SHOW_SNAPSHOTS_FOUND~
 Show snapshots found during run "grub-mkconfig"
 - Default: "true"
-Example: ~GRUB_BTRFS_SHOW_SNAPSHOTS_FOUND="false"~
+- Example: ~GRUB_BTRFS_SHOW_SNAPSHOTS_FOUND="false"~

 *** ~GRUB_BTRFS_ROOTFLAGS~
 Comma seperated mount options to be used when booting a snapshot.
@@ -64,14 +64,14 @@ They can be defined here as well as in the "/" line inside the respective snapsh
 takes priority over `fstab` entries.
 NB: Do NOT include "subvol=..." or "subvolid=..." here.
 - Default: ""
-Example: ~GRUB_BTRFS_ROOTFLAGS="space_cache,commit=10,norecovery"~
+- Example: ~GRUB_BTRFS_ROOTFLAGS="space_cache,commit=10,norecovery"~

 *** ~GRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION~
 By default "grub-btrfs" automatically detects your boot partition,
 either located at the system root or on a separate partition or in a subvolume,
 Change to "true" if your boot partition is not detected as separate.
 - Default: "false"
-Example: ~GRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION="true"~
+- Example: ~GRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION="true"~

 ** CUSTOM KERNELS

@@ -79,7 +79,7 @@ Change to "true" if your boot partition is not detected as separate.
 By default, "grub-btrfs" automatically detects most existing kernels, initramfs and microcode.
 Customs kernel, initramfs and microcodes that are not detected can be added in these variables.
 - Default: ("")
-Example: ~GRUB_BTRFS_NKERNEL=("kernel-5.19.4-custom" "vmlinux-5.19.4-custom")~
+- Example: ~GRUB_BTRFS_NKERNEL=("kernel-5.19.4-custom" "vmlinux-5.19.4-custom")~
          ~GRUB_BTRFS_NINIT=("initramfs-5.19.4-custom.img" "initrd-5.19.4-custom.img" "otherinit-5.19.4-custom.gz")~
          ~GRUB_BTRFS_CUSTOM_MICROCODE=("custom-ucode.img" "custom-uc.img "custom_ucode.cpio")~

@@ -90,14 +90,14 @@ Ignore specific path during run "grub-mkconfig".
 Only exact paths are ignored.
 e.g : if `specific path` = @, only `@` snapshot will be ignored.
 - Default: ("@")
-Example: ~GRUB_BTRFS_IGNORE_SPECIFIC_PATH=("@home")~
+- Example: ~GRUB_BTRFS_IGNORE_SPECIFIC_PATH=("@home")~

 *** ~GRUB_BTRFS_IGNORE_PREFIX_PATH~
 Ignore prefix path during run "grub-mkconfig".
 Any path starting with the specified string will be ignored.
 e.g : if `prefix path` = @, all snapshots beginning with "@/..." will be ignored.
 - Default: ("var/lib/docker" "@var/lib/docker" "@/var/lib/docker")
-Example: ~GRUB_BTRFS_IGNORE_PREFIX_PATH=("var/lib/docker" "@var/lib/docker" "@/var/lib/docker")~
+- Example: ~GRUB_BTRFS_IGNORE_PREFIX_PATH=("var/lib/docker" "@var/lib/docker" "@/var/lib/docker")~

 *** ~GRUB_BTRFS_IGNORE_SNAPSHOT_TYPE~
 Ignore specific type/tag of snapshot during run "grub-mkconfig".
@@ -106,12 +106,12 @@ Type = single, pre, post.
 For Timeshift:
 Tag = boot, ondemand, hourly, daily, weekly, monthly.
 - Default: ("")
-Example: ~GRUB_BTRFS_IGNORE_SNAPSHOT_TYPE=("ondemand")~
+- Example: ~GRUB_BTRFS_IGNORE_SNAPSHOT_TYPE=("ondemand")~

 *** ~GRUB_BTRFS_IGNORE_SNAPSHOT_DESCRIPTION~
 Ignore specific description of snapshot during run "grub-mkconfig".
 - Default: ("")
-Example: ~GRUB_BTRFS_IGNORE_SNAPSHOT_DESCRIPTION=("timeline")~
+- Example: ~GRUB_BTRFS_IGNORE_SNAPSHOT_DESCRIPTION=("timeline")~

 ** DISTRIBUTION DEPENDENT SETTINGS

@@ -119,7 +119,7 @@ Ignore specific description of snapshot during run "grub-mkconfig".
 Location of kernels/initramfs/microcode.
 Used by "grub-btrfs" to detect the boot partition and the location of kernels, initramfs and microcodes.
 - Default: "/boot"
-Example: ~GRUB_BTRFS_BOOT_DIRNAME="/"~
+- Example: ~GRUB_BTRFS_BOOT_DIRNAME="/"~

 *** ~GRUB_BTRFS_GRUB_DIRNAME~
 Location of the folder containing the "grub.cfg" file.
@@ -127,7 +127,27 @@ Used by grub-btrfs to save the file "grub-btrfs.cfg".
 Might be grub2 on some systems.
 For example, on Fedora with EFI : "/boot/efi/EFI/fedora"
 - Default: "/boot/grub"
-Example: ~GRUB_BTRFS_GRUB_DIRNAME="/boot/grub2"~
+- Example: ~GRUB_BTRFS_GRUB_DIRNAME="/boot/grub2"~
+
+*** ~GRUB_BTRFS_GBTRFS_DIRNAME~
+ Location where grub-btrfs.cfg should be saved.
+ Some distributions (like OpenSuSE) store those file at the snapshot directory
+ instead of boot. Be aware that this direcory must be available for grub during
+ startup of the system.
+- Default: "/boot/grub"
+- Example GRUB_BTRFS_GBTRFS_DIRNAME="/boot/grub"
+
+*** ~GRUB_BTRFS_GBTRFS_SEARCH_DIRNAME~
+Location of the directory where Grub searches for the grub-btrfs.cfg file.
+Some distributions (like OpenSuSE) store those file at the snapshot directory
+instead of boot. Be aware that this direcory must be available for grub during
+startup of the system.
+- Default: "\${prefix}" (This is a grub variable that resolves to where grub is
+installed. (like /boot/grub, /boot/efi/grub))
+- NOTE: If variables of grub are used here like ${prefix}, they need to be escaped
+with `\` before the `$`
+- Example: GRUB_BTRFS_GBTRFS_SEARCH_DIRNAME="\${prefix}"
+

 *** ~GRUB_BTRFS_MKCONFIG~
 Name/path of the command to generate the grub menu, used by "grub-btrfs.service"
@@ -135,7 +155,7 @@ Might be 'grub2-mkconfig' on some systems (e.g. Fedora)
 Default paths are /sbin:/bin:/usr/sbin:/usr/bin, if your path is missing, report it on the upstream project.
 You can use the name of the command only or full the path.
 - Default: grub-mkconfig
-Example: ~GRUB_BTRFS_MKCONFIG=/sbin/grub2-mkconfig~
+- Example: ~GRUB_BTRFS_MKCONFIG=/sbin/grub2-mkconfig~

 *** ~GRUB_BTRFS_SCRIPT_CHECK~
 Name of grub-script-check command, used by "grub-btrfs"