Module: Pgpass

Defined in:
lib/pgpass.rb,
lib/pgpass/version.rb

Defined Under Namespace

Classes: Entry

Constant Summary collapse

LOCATIONS = 
[ENV['PGPASSFILE'], './.pgpass', '~/.pgpass']
VERSION = 
"2012.01.18"

Class Method Summary collapse

Class Method Details

.guess(paths = PATH) ⇒ Object 



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# File 'lib/pgpass.rb', line 131

def guess(paths = PATH)
  PATH.each do |path|
    begin
      load_file(File.join(path, ".pgpass"))
    rescue Errno::ENOENT => ex
      warn(ex)
    end
  end
end

.load(io) ⇒ Object 



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# File 'lib/pgpass.rb', line 145

def load(io)
  io.each_line.map{|line| parse_line(line) }
end

.load_file(path) ⇒ Object 



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# File 'lib/pgpass.rb', line 141

def load_file(path)
  File.open(File.expand_path(path), 'r'){|io| load(io) }
end

.match(given_options = {}) ⇒ Object 



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# File 'lib/pgpass.rb', line 107

def match(given_options = {})
  search = Entry.create(
    user:     (ENV['PGUSER'] || '*'),
    password: ENV['PGPASSWORD'],
    host:     (ENV['PGHOST'] || '*'),
    port:     (ENV['PGPORT'] || '*'),
    database: (ENV['PGDATABASE'] || '*'),
  ).merge(given_options)

  LOCATIONS.compact.each do |path|
    path = File.expand_path(path)
    # consider only files
    next unless File.file?(path)
    # that aren't world/group accessible
    next unless File.stat(path).mode & 077 == 0

    load_file(path).each do |entry|
      return entry.complement(search) if entry == search
    end
  end

  nil
end

.parse_line(line) ⇒ Object 



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# File 'lib/pgpass.rb', line 149

def parse_line(line)
  sc = StringScanner.new(line)
  entry = Entry.new
  key_index = 0
  value = ''

  loop do
    pos = sc.pos

    if sc.bol?
      if sc.scan(/\s*#/)
        # commented line
        return
      elsif sc.scan(/\s*$/)
        # empty line
        return
      end
    end

    if sc.eos?
      entry[Entry.members[key_index]] = value
      return entry # end of string
    end

    if sc.scan(/\\:/)
      value << ':'
    elsif sc.scan(/\\\\/)
      value << '\\'
    elsif sc.scan(/:/)
      entry[Entry.members[key_index]] = value
      key_index += 1
      value = ''
    elsif sc.scan(/\r\n|\r|\n/)
      entry[Entry.members[key_index]] = value
      return entry
    elsif sc.scan(/./)
      value << sc[0]
    end

    if sc.pos == pos
      raise "position didn't advance, stuck in parsing"
    end
  end

  return entry
end