doctor.rb

require "cmd/missing"
require "formula"
require "keg"
require "version"

class Volumes
  def initialize
    @volumes = get_mounts
  end

  def which path
    vols = get_mounts path

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

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

  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 << $1
        end
      end
    end
    return vols
  end
end


class Checks

############# HELPERS
  # Finds files in HOMEBREW_PREFIX *and* /usr/local.
  # Specify paths relative to a prefix eg. "include/foo.h".
  # Sets @found for your convenience.
  def find_relative_paths *relative_paths
    @found = %W[#{HOMEBREW_PREFIX} /usr/local].uniq.inject([]) do |found, prefix|
      found + relative_paths.map{|f| File.join(prefix, f) }.select{|f| File.exist? f }
    end
  end

  def inject_file_list(list, str)
    list.inject(str) { |s, f| s << "    #{f}\n" }
  end

  # Git will always be on PATH because of the wrapper script in
  # Library/Contributions/cmd, so we check if there is a *real*
  # git here to avoid multiple warnings.
  def git?
    return @git if instance_variable_defined?(:@git)
    @git = system "git --version >/dev/null 2>&1"
  end