Class: Homebrew::Diagnostic::Volumes

Inherits:
Object
  • Object
show all
Defined in:
Library/Homebrew/diagnostic.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Volumes

Returns a new instance of Volumes.


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# File 'Library/Homebrew/diagnostic.rb', line 24

def initialize
  @volumes = get_mounts
end

Instance Method Details

#get_mounts(path = nil) ⇒ Object 


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# File 'Library/Homebrew/diagnostic.rb', line 40

def get_mounts(path = nil)
  vols = []
  # get the volume of path, if path is nil returns all volumes

  args = %w[/bin/df -P]
  args << path if path

  Utils.popen_read(*args) do |io|
    io.each_line do |line|
      case line.chomp
        # regex matches: /dev/disk0s2   489562928 440803616  48247312    91%    /
      when /^.+\s+[0-9]+\s+[0-9]+\s+[0-9]+\s+[0-9]{1,3}%\s+(.+)/
        vols << Regexp.last_match(1)
      end
    end
  end
  vols
end

#which(path) ⇒ Object 


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# File 'Library/Homebrew/diagnostic.rb', line 28

def which(path)
  vols = get_mounts path

  # no volume found
  return -1 if vols.empty?

  vol_index = @volumes.index(vols[0])
  # volume not found in volume list
  return -1 if vol_index.nil?
  vol_index
end