blob: ff9e1a63441dd07019fcf9c254abb709d7eeb22b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
##
# The YAML module allows you to use one of the two YAML engines that ship with
# ruby. By default Psych is used but the old and unmaintained Syck may be
# chosen.
#
# See Psych or Syck for usage and documentation.
#
# To set the YAML engine to syck:
#
# YAML::ENGINE.yamler = 'syck'
#
# To set the YAML engine back to psych:
#
# YAML::ENGINE.yamler = 'psych'
module YAML
class EngineManager # :nodoc:
attr_reader :yamler
def initialize
@yamler = nil
end
def syck?
'syck' == @yamler
end
def yamler= engine
raise(ArgumentError, "bad engine") unless %w{syck psych}.include?(engine)
require engine unless (engine == 'syck' ? Syck : Psych).const_defined?(:VERSION)
Object.class_eval <<-eorb, __FILE__, __LINE__ + 1
remove_const 'YAML'
YAML = #{engine.capitalize}
remove_method :to_yaml
alias :to_yaml :#{engine}_to_yaml
eorb
@yamler = engine
engine
end
end
##
# Allows changing the current YAML engine. See YAML for details.
ENGINE = YAML::EngineManager.new
end
if defined?(Psych)
engine = 'psych'
elsif defined?(Syck)
engine = 'syck'
else
begin
require 'psych'
engine = 'psych'
rescue LoadError
warn "#{caller[0]}:"
warn "It seems your ruby installation is missing psych (for YAML output)."
warn "To eliminate this warning, please install libyaml and reinstall your ruby."
require 'syck'
engine = 'syck'
end
end
module Syck
ENGINE = YAML::ENGINE
end
module Psych
ENGINE = YAML::ENGINE
end
YAML::ENGINE.yamler = engine
|
