lib/cruxutils/packagedb.rb

   1 module CruxUtils
   2
   3 class PackageDb
   4         class PackageDbError < CruxUtilsError; end
   5         class PackageNotFoundError < PackageDbError; end
   6
   7         FILE = "/var/lib/pkg/db"
   8
   9         def PackageDb.open
  10                 db = PackageDb.new
  11
  12                 yield db
  13         ensure
  14                 db.close
  15         end
  16
  17         def initialize
  18                 @lines = File.read(FILE).split("\n").map { |l| l.strip }
  19         end
  20
  21         def close
  22         end
  23
  24         def [](name)
  25                 name = name.to_str.strip
  26                 found = -1
  27
  28                 found = @lines.find { |l| l == name }
  29                 raise(PackageNotFoundError) if found.nil?
  30
  31                 i = @lines.index(found)
  32
  33                 version, release = @lines[i + 1].match(/^(.*)-(\d+)$/).captures
  34                 files = []
  35
  36                 (i + 2).upto(@lines.length) do |i|
  37                         break if @lines[i].strip.empty?
  38
  39                         files << @lines[i]
  40                 end
  41
  42                 Package.new(name, version, release, files.sort)
  43         end
  44 end
  45
  46 end