[Bug 1824213] [NEW] GRUB_HIDDEN_TIMEOUT still referred to in postinst scripts despite change to GRUB_TIMEOUT_STYLE=hidden

[Mathieu Trudel-Lapierre]

Public bug reported:

We've moved to using GRUB_TIMEOUT_STYLE=hidden in /etc/default/grub, but
debian/postinst.in still references GRUB_HIDDEN_TIMEOUT variable and
attempts to set that in conffile handling:

    case @PACKAGE@ in
      grub-pc)
        apply_conf_tweaks "$conf_files" merge_debconf_into_conf GRUB_TIMEOUT grub-pc/timeout
        apply_conf_tweaks "$conf_files" sed_conf 's/^(GRUB_TIMEOUT=)"([0-9][0-9]*)"/\1\2/'
        db_get grub-pc/hidden_timeout
        if [ "$RET" = false ]; then
          apply_conf_tweaks "$conf_files" sed_conf 's/^GRUB_HIDDEN_TIMEOUT=/#&/'
        fi
      ;;


This may lead to confusion in grub's conffile handling and in the resulting /etc/default/grub, potentially leading to unnecessary debconf/ucf prompts for conffile changes.

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1824213

Title:
  GRUB_HIDDEN_TIMEOUT still referred to in postinst scripts despite
  change to GRUB_TIMEOUT_STYLE=hidden

Status in grub2 package in Ubuntu:
  New

Bug description:
  We've moved to using GRUB_TIMEOUT_STYLE=hidden in /etc/default/grub,
  but debian/postinst.in still references GRUB_HIDDEN_TIMEOUT variable
  and attempts to set that in conffile handling:

      case @PACKAGE@ in
        grub-pc)
          apply_conf_tweaks "$conf_files" merge_debconf_into_conf GRUB_TIMEOUT grub-pc/timeout
          apply_conf_tweaks "$conf_files" sed_conf 's/^(GRUB_TIMEOUT=)"([0-9][0-9]*)"/\1\2/'
          db_get grub-pc/hidden_timeout
          if [ "$RET" = false ]; then
            apply_conf_tweaks "$conf_files" sed_conf 's/^GRUB_HIDDEN_TIMEOUT=/#&/'
          fi
        ;;

  
  This may lead to confusion in grub's conffile handling and in the resulting /etc/default/grub, potentially leading to unnecessary debconf/ucf prompts for conffile changes.

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