[Bug 1745696] Re: partman hangs when partman-basicfilesystems/no_swap set and no LVM swap partition provided in expert recipe

[Chris McCoy]

You might disregard and close this bug.  I probably have my
understanding of basicfilesystems/no_swap inverted.

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Title:
  partman hangs when partman-basicfilesystems/no_swap set and no LVM
  swap partition provided in expert recipe

Status in debian-installer package in Ubuntu:
  New

Bug description:
  partman hangs when partman-basicfilesystems/no_swap is set to true and
  no LVM swap partition provided in expert recipe.

  * Conditions:

  Ubuntu 16.04.3LTS,

  Preseed configured with:

  d-i partman-basicfilesystems/no_swap boolean true

  d-i partman-partitioning/confirm_write_new_label boolean true
  d-i partman/choose_partition select finish
  d-i partman/confirm boolean true
  d-i partman/confirm_nooverwrite boolean true
  d-i partman-partitioning/default_label string gpt
  d-i partman-auto/disk string /dev/sda
  d-i partman-auto/method string lvm
  d-i partman-lvm/device_remove_lvm boolean true
  d-i partman-md/device_remove_md boolean true
  d-i partman-lvm/confirm boolean true
  d-i partman-lvm/confirm_nooverwrite boolean true
  d-i partman-auto-lvm/new_vg_name string flexflash
  d-i partman-auto/choose_recipe select partlayout
  d-i partman-auto-lvm/guided_size string max
  d-i partman-auto/expert_recipe string \
     partlayout :: \
        538 538 1075 fat32 \
           $iflabel{ gpt } \
           $reusemethod{ } \
           method{ efi } \
           format{ } \
           . \
        500 500 500 ext2 \
           method{ format } \
           format{ } \
           use_filesystem{ } \
           filesystem{ ext2 } \
           mountpoint{ /boot } \
           . \
        25600 25600 -1 xfs \
           $lvmok{ } \
           lv_name{ root } \
           method{ format } \
           format{ } \
           use_filesystem{ } \
           filesystem{ xfs } \
           mountpoint{ / } \
           .

  * Issue

  I believe the bug is caused by inverted return boolean in:

  /lib/partman/check.d/10check_swap

  if ! $swap; then
  	db_input critical partman-basicfilesystems/no_swap || true
  	db_go || true
  	db_get partman-basicfilesystems/no_swap
  	if [ "$RET" = true ]; then
  		exit 1
  	fi
  fi

  Shouldn't script return 0/true when swap not found but partman-
  basicfilesystems/no_swap is set to true?

  * Workaround

  d-i partman/early_command string sh -c 'sed -i "s^exit 1^exit 0^"
  /lib/partman/check.d/10check_swap; echo "exit 1" >>
  /lib/partman/check.d/10check_swap'

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