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Implement configure_fstab() as a replacement of ogConfigureFstab.
Create src/utils/fstab.py to implement the main fstab
configuration functions. Define two fstab helper classes,
FstabBuilder and FstabEntry.
FstabEntry
Represents each line in the fstab file.
Has the values: device, mountpoint, fstype, options, dump_code
and pass_code.
FstabBuilder
Contains a list of FstabEntry. Handles loading of a
preexisting fstab file and the serialization of multiple
FstabEntry into a file.
The fstab configuration has 3 main steps:
Root partition:
- Update the device field with the device where
the new system is installed.
Swap partition:
- Preserve all the swapfile entries in every case.
- If the filesystem has a swap partition: update the device field
in the first fstab swap entry and remove the rest swap entries
pointing to a swap partition. Only one swap partition is supported.
Create a new fstab entry if no preexisting swap entry exists.
- If the system has no swap partition remove every swap partition
entry.
EFI partition:
- Update the device field of the EFI fstab entry if it exists.
Create a new fstab entry if no preexisting EFI entry exists.
Add get_filesystem_id to disk.py to obtain the UUID.
Define every device field as a UUID. That method is more robust
than a plain device path as it works after disks being added or
removed.
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