How do I auto-adjust sector geometry when deleting a partition?

[Yurii-huang]

created partition sda1、sda2、sda3.
When I delete sda2,
It doesn't automatically rearrange the sector positions, is there any good way to implement it?

[vojtechtrefny]

If we are talking about partitions that are not created yet, just scheduled to be created than running do_partitioning after removing the sda2 partition should automatically move the third partition:

In [1]: import blivet; b=blivet.Blivet(); b.reset()

In [2]: sdf = b.devicetree.get_device_by_name("sdf")

In [4]: part1 = b.new_partition(size=blivet.size.Size("1 GiB"), parents=[sdf])

In [5]: b.create_device(part1)

In [6]: part2 = b.new_partition(size=blivet.size.Size("1 GiB"), parents=[sdf])

In [7]: b.create_device(part2)

In [8]: part3 = b.new_partition(size=blivet.size.Size("1 GiB"), parents=[sdf])

In [9]: b.create_device(part3)

In [10]: blivet.partitioning.do_partitioning(b)

In [11]: part1.parted_partition.geometry.start
Out[11]: 2099200

In [12]: part2.parted_partition.geometry.start
Out[12]: 4196352

In [13]: part3.parted_partition.geometry.start
Out[13]: 6297600

In [14]: b.destroy_device(part2)

In [15]: blivet.partitioning.do_partitioning(b)

In [16]: part3.parted_partition.geometry.start
Out[16]: 4196352

see the part3 start moving from 6297600 to 4196352 after removing part2.