[Bug 2098075] Re: use-gap on IMSM RAID devices installs another ESP partition, despite there is one available

[Olivier Gayot]

Yao tested this using the 24.04/stable ubuntu-desktop-bootstrap snap.
Thanks Yao! Marking fix resolved.

** Changed in: subiquity (Ubuntu Noble)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/2098075

Title:
  use-gap on IMSM RAID devices installs another ESP partition, despite
  there is one available

Status in curtin:
  Fix Committed
Status in subiquity:
  Fix Released
Status in subiquity package in Ubuntu:
  Fix Released
Status in subiquity source package in Noble:
  Fix Released
Status in subiquity source package in Plucky:
  Fix Released

Bug description:
  use_gap on RAID installs another EFI partition, and I found out that
  for RAID devices, there's no device.ptable and
  common/filesystem/boot.py:_is_esp_partition was looking for it.

  
  ```
  def _is_esp_partition(partition):
      new_disk = attr.evolve(partition.device)
      new_disk._partitions = []
      if not can_be_boot_device(new_disk, with_reformatting=True):
          return False
      if partition.device.ptable == "gpt":
          return partition.flag == "boot"
  ```

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