disko/disk-deactivate/disk-deactivate.jq
danjujan f7424625dc
Rework Hybrid MBR https://github.com/nix-community/disko/pull/168 (#508)
Add hybrid MBR functionality to the gpt type
2024-01-26 21:59:23 +01:00

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# since lsblk lacks zfs support, we have to do it this way
def remove:
if .fstype == "zfs_member" then
"zpool destroy -f \(.label)"
elif .fstype == "LVM2_member" then
[
"vg=$(pvs \(.path) --noheadings --options vg_name | grep -o '[a-zA-Z0-9-]*')",
"vgchange -a n \"$vg\"",
"vgremove -f \"$vg\""
]
elif .fstype == "swap" then
"swapoff \(.path)"
elif .fstype == null then
# maybe its zfs
[
# the next line has some horrible escaping
"zpool=$(zdb -l \(.path) | sed -nr $'s/ +name: \\'(.*)\\'/\\\\1/p')",
"if [[ -n \"${zpool}\" ]]; then zpool destroy -f \"$zpool\"; fi",
"unset zpool"
]
else
[]
end
;
def deactivate:
if .type == "disk" or .type == "loop" then
[
# If this disk is a member of raid, stop that raid
"md_dev=$(lsblk \(.path) -l -p -o type,name | awk 'match($1,\"raid.*\") {print $2}')",
"if [[ -n \"${md_dev}\" ]]; then umount \"$md_dev\"; mdadm --stop \"$md_dev\"; fi",
# Remove all file-systems and other magic strings
"wipefs --all -f \(.path)",
# Remove the MBR bootstrap code
"dd if=/dev/zero of=\(.path) bs=440 count=1"
]
elif .type == "part" then
[
"wipefs --all -f \(.path)"
]
elif .type == "crypt" then
[
"cryptsetup luksClose \(.path)",
"wipefs --all -f \(.path)"
]
elif .type == "lvm" then
(.name | split("-")[0]) as $vgname |
(.name | split("-")[1]) as $lvname |
[
"lvremove -fy \($vgname)/\($lvname)"
]
elif (.type | contains("raid")) then
[
"mdadm --stop \(.name)"
]
else
["echo Warning: unknown type '\(.type)'. Consider handling this in https://github.com/nix-community/disko/blob/master/disk-deactivate/disk-deactivate.jq"]
end
;
def walk:
[
(.mountpoints[] | select(. != null) | "umount -R \(.)"),
((.children // []) | map(walk)),
remove,
deactivate
]
;
def init:
"/dev/\(.name)" as $disk |
if $disk == $disk_to_clear then
[
"set -fu",
walk
]
else
[]
end
;
.blockdevices | map(init) | flatten | join("\n")