Class: Bootloader::Sections

Inherits:

Object

• Object
• Bootloader::Sections

show all

Includes:

Yast::Logger

Defined in:

src/lib/bootloader/sections.rb

Overview

Instance Attribute Summary (collapse)

• - (Object) all readonly

  Returns the value of attribute all.

Instance Method Summary (collapse)

• - (String) default

  Name of default section.

• - (Object) default=(value)

  Sets default section internally.

• - (Sections) initialize(grub_cfg = nil) constructor

  or nil if not available yet.

• - (Object) write

  writes default to system making it persistent.

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# File 'src/lib/bootloader/sections.rb', line 15

def initialize(grub_cfg = nil)
  @all = grub_cfg ? grub_cfg.sections : []
end

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# File 'src/lib/bootloader/sections.rb', line 11

def all
  @all
end

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# File 'src/lib/bootloader/sections.rb', line 20

def default
  return @default if @default

  return @default = "" if Yast::Stage.initial

  # Execute.on_target can return nil if call failed. It shows users error popup, but bootloader
  # can continue with empty default section
  saved = Yast::Execute.on_target("/usr/bin/grub2-editenv", "list", stdout: :capture) || ""
  saved_line = saved.lines.grep(/saved_entry=/).first

  @default = saved_line ? saved_line[/saved_entry=(\S*)/, 1] : all.first
end

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# File 'src/lib/bootloader/sections.rb', line 35

def default=(value)
  log.info "set new default to '#{value.inspect}'"

  # empty value mean no default specified
  raise "Unknown value #{value.inspect}" if !all.include?(value) && !value.empty?

  @default = value
end

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# File 'src/lib/bootloader/sections.rb', line 45

def write
  return if default.empty?
  Yast::Execute.on_target("/usr/sbin/grub2-set-default", default)
end