Module: PuppetX::AugeasprovidersGrub::Util

Defined in:
lib/puppetx/augeasproviders_grub/menuentry.rb

Class Method Summary collapse

Class Method Details

.grub2_cfg ⇒ String

Return the contents of the GRUB2 configuration on the system. Raise an error if not found.

Returns:

  • (String) —

    The contents of the GRUB2 configuration on the system.



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# File 'lib/puppetx/augeasproviders_grub/menuentry.rb', line 163

def self.grub2_cfg
  return File.read(grub2_cfg_path)
end

.grub2_cfg_path ⇒ String

Return the location of the GRUB2 configuration on the system. Raise an error if not found.

Returns:

  • (String) —

    The full path to the GRUB2 configuration file.

Raises:

  • (Puppet::Error) 


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# File 'lib/puppetx/augeasproviders_grub/menuentry.rb', line 128

def self.grub2_cfg_path
  paths = [
    '/etc/grub2.cfg',
    '/boot/grub2/grub.cfg'
  ]

  if File.exist?('/sys/firmware/efi')
    os_info = Facter.value(:os)
    if os_info
      os_name = Facter.value(:os)['name']
    else
      # Support for old versions of Facter
      unless os_name
        os_name = Facter.value(:operatingsystem)
      end
    end

    paths = [
      '/etc/grub2-efi.cfg',
      # Handle the standard EFI naming convention
      "/boot/efi/EFI/#{os_name.downcase}/grub.cfg"
    ] + paths
  end

  paths.each do |path|
    return path if (File.readable?(path) && !File.directory?(path))
  end

  raise Puppet::Error, 'Could not find a GRUB2 configuration on the system'
end

.munge_grubby_value(value, flavor, grubby_info) ⇒ Object

Take care of copying ‘:default:’ values and ensure that the leading ‘boot’ entries are stripped off of passed entries.



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# File 'lib/puppetx/augeasproviders_grub/menuentry.rb', line 103

def self.munge_grubby_value(value, flavor, grubby_info)
  if value == ':default:'
    if grubby_info.empty? || !grubby_info[flavor]
      raise Puppet::Error, "No default GRUB information found for `#{flavor}`"
    end

    value = grubby_info[flavor]

    # In some cases, /boot gets shoved on by GRUB and we can't compare againt
    # that.
    value = value.split('/')
    if value[1] == 'boot'
      value.delete_at(1)
    end

    value = value.join('/')
  end

  return value
end

.munge_options(system_opts, new_opts, default_opts = []) ⇒ Array

Return a merge of the system options and the new options.

The following format is supported for the new options ‘:defaults:’ => Copy defaults from the default GRUB entry ‘:preserve:’ => Preserve all existing options (if present)

‘:defaults:’ and ‘:preserve:’ are mutually exclusive!

All of the options below supersede any items affected by the above

‘entry(=.*)?’ => Ensure that ‘entry` exists *as entered*; replaces all

other options with the same name

‘!entry(=.*)? => Add this option to the end of the arguments,

preserving any other options of the same name

‘-:entry’ => Ensure that all instances of ‘entry` do not exist ’-:entry=foo’ => Ensure that only instances of ‘entry` with value `foo` do not exist

Parameters:

  • system_opts (Array) —

    the current system options for this entry

  • new_opts (Array) —

    the new options for this entry

  • default_opts (Array) (defaults to: []) —

    the default entry options (if applicable)

Returns:

  • (Array) —

    a merged/manipulated array of options



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# File 'lib/puppetx/augeasproviders_grub/menuentry.rb', line 25

def self.munge_options(system_opts, new_opts, default_opts=[])
  sys_opts = Array(system_opts).flatten.map(&:strip)
  opts     = Array(new_opts).flatten.map(&:strip)
  def_opts = Array(default_opts).flatten.map(&:strip)

  result_opts = []

  if opts.delete(':defaults:')
    result_opts += def_opts
  end

  if opts.delete(':preserve:')
    # Need to remove any result opts that are being preserved
    sys_opts_keys = sys_opts.map{|x| x = x.split('=').first.strip}

    result_opts.delete_if do |x|
      key = x.split('=').first.strip

      sys_opts_keys.include?(key)
    end

    result_opts += sys_opts
  end

  # Get rid of everything with a '-:'
  discards = Array(opts.select{|x| x =~ /^-:/}.map{|x| x = x[2..-1]})
  opts.delete_if{|x| x =~ /^-:/}

  result_opts.delete_if{|x|
    discards.index{|d|
      ( d == x ) || ( d == x.split('=').first )
    }
  }

  # Prepare to append everything with a '!:'
  appends = Array(opts.select{|x| x =~ /^!:/}.map{|x| x = x[2..-1]})
  opts.delete_if{|x| x =~ /^!:/}

  # We only want to append items that aren't in the list already
  appends.delete_if{|x| result_opts.include?(x)}

  # Replace these items in place if possible
  tmp_results = []
  new_results = []

  opts.each do |opt|
    key = opt.split('=').first

    old_entry = result_opts.index{|x| x.split('=').first == key}

    if old_entry
      # Replace the first instance of a given item with the matching option.
      tmp_results[old_entry] = opt
      result_opts.map!{|x| x = (x.split('=').first == key) ? nil : x}
    else
      # Keep track of everything that we aren't replacing
      new_results << opt
    end
  end

  # Copy in all of the remaining options in place
  result_opts.each_index do |i|
    if result_opts[i]
      tmp_results[i] = result_opts[i]
    end
  end

  result_opts = tmp_results.compact + new_results + appends
  return result_opts
end

.munged_options(old_opts, new_opts, default_kernel, default_kernel_opts, prepend_kernel_path = false) ⇒ Array[String]

Return a list of options that have the kernel path prepended and are formatted with all processing arguments handled.

Parameters:

  • old_opts (Array[String]) —

    An array of all old options

  • new_opts (Array[String]) —

    An array of all new options

  • default_kernel (String) —

    The default kernel

  • default_kernel_opts (Array[String]) —

    The default kernel options

  • prepend_kernel_path (Boolean) (defaults to: false) —

    If true, add the kernel itself to the default kernel options

Returns:

  • (Array[String]) —

    An Array of processed options



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# File 'lib/puppetx/augeasproviders_grub/menuentry.rb', line 176

def self.munged_options(old_opts, new_opts, default_kernel, default_kernel_opts, prepend_kernel_path=false)
  # You need to prepend the kernel path for the defaults if you're trying to
  # format for `module` lines.

  default_kernel_opts = Array(default_kernel_opts)

  if default_kernel
    if prepend_kernel_path
      default_kernel_opts = Array(default_kernel) + default_kernel_opts
    end
  end

  return munge_options(old_opts, new_opts, default_kernel_opts)
end