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#
# Monkey patches to ruby classes for compatibility
#
#
# In earlier versions of ruby (e.g. 1.8.1) yaml serialized symbols with an explicit
# type designation. Later versions understand the explicit form in addition to the
# implicit "literal" form (e.g. :symbol) which they produce.
#
# This causes problems when the puppet master and the client are running on different
# versions of ruby; the newer version can produce yaml that it's older partner can't
# decypher.
#
# This patch causes newer versions to produce the older encoding for Symbols. It is
# only applied if the existing library does not already produce them. Thus it will
# not be applied on older rubys and it will not be applied more than once. It also
# checks that it has been applied to a version which support it and, if not reverts
# to the original.
#
require "yaml"
if :test.to_yaml !~ %r{!ruby/sym}
class Symbol
if !respond_to? :original_to_yaml
alias :original_to_yaml :to_yaml
def to_yaml(opts={})
YAML::quick_emit(nil,opts) { |out|
if out.respond_to? :scalar
# 1.8.5 through 1.8.8, possibly others
out.scalar("tag:ruby:sym", to_s,:to_yaml_style)
elsif out.respond_to? :<<
# 1.8.2, possibly others
out << "!ruby/sym "
self.id2name.to_yaml( :Emitter => out )
else
# go back to the base version if neither of the above work
alias :to_yaml :original_to_yaml
to_yaml(opts)
end
}
end
end
end
end
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