Properly handle multiple entries for the same device in lsblk output

[st-matskevich]

I'm using dev-mapper to stitch partitions into one disk. Because dev-mapped devices appear under every source device, grep'ing produces multiple entries and breaks logic. This PR simply adds uniq to all lsblk calls to avoid such problems.

lsblk output

NAME         MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
loop0          7:0    0  21.1G  1 loop
└─overlay    254:0    0    22G  0 dm
  ├─overlay1 254:1    0   255M  0 part /mnt/export-boot
  └─overlay2 254:2    0  21.1G  0 part /mnt/export-windows
loop1          7:1    0    22G  0 loop
└─overlay    254:0    0    22G  0 dm
  ├─overlay1 254:1    0   255M  0 part /mnt/export-boot
  └─overlay2 254:2    0  21.1G  0 part /mnt/export-windows

Result without uniq

Checking block devices for ESP (sudo required)...
Partition at /dev/mapper/overlay1 is vfat
vfat format.
ESP must be FAT or NTFS format.

Result with uniq

Checking block devices for ESP (sudo required)...
Copy the EFI boot files to the ESP...
Build the main BCD store...
Loader GUID: {ab1c6758-6c9a-47e3-bf03-836974eb7037}
Resume GUID: {e7b626e8-44d9-414d-9bb8-bfabe704c49f}
Build the recovery BCD store...
Copy the BCD hives to the ESP folders...
Copy bootmgfw.efi to default boot path...
Clean up temporary files...
Finished configuring UEFI boot files.

[st-matskevich]

@jpz4085 what do you think about this one? Could you please review it?

[jpz4085]

Hi @st-matskevich this looks good to me. Sorry for the prolonged delay but I didn't have time to look at this until now. Thanks!