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|
# vim:sw=4:ts=4
# $Id$
#
# YAML.rb
#
# Loads the parser/loader and emitter/writer.
#
module YAML
begin
require 'yaml/syck'
@@parser = YAML::Syck::Parser
@@loader = YAML::Syck::DefaultLoader
@@emitter = YAML::Syck::Emitter
rescue LoadError
require 'yaml/parser'
@@parser = YAML::Parser
@@loader = YAML::DefaultLoader
require 'yaml/emitter'
@@emitter = YAML::Emitter
end
require 'yaml/loader'
require 'yaml/stream'
#
# Load a single document from the current stream
#
def YAML.dump( obj, io = nil )
io ||= ""
io << obj.to_yaml
io
end
#
# Load a single document from the current stream
#
def YAML.load( io )
yp = @@parser.new.load( io )
end
#
# Parse a single document from the current stream
#
def YAML.parse( io )
yp = @@parser.new( :Model => :Generic ).load( io )
end
#
# Load all documents from the current stream
#
def YAML.each_document( io, &doc_proc )
yp = @@parser.new.load_documents( io, &doc_proc )
end
#
# Identical to each_document
#
def YAML.load_documents( io, &doc_proc )
YAML.each_document( io, &doc_proc )
end
#
# Parse all documents from the current stream
#
def YAML.each_node( io, &doc_proc )
yp = @@parser.new( :Model => :Generic ).load_documents( io, &doc_proc )
end
#
# Parse all documents from the current stream
#
def YAML.parse_documents( io, &doc_proc )
YAML.each_node( io, &doc_proc )
end
#
# Load all documents from the current stream
#
def YAML.load_stream( io )
yp = @@parser.new
d = nil
yp.load_documents( io ) { |doc|
d = YAML::Stream.new( yp.options ) if not d
d.add( doc )
}
return d
end
#
# Add a transfer method to a domain
#
def YAML.add_domain_type( domain, type_re, &transfer_proc )
@@loader.add_domain_type( domain, type_re, &transfer_proc )
end
#
# Add a transfer method for a builtin type
#
def YAML.add_builtin_type( type_re, &transfer_proc )
@@loader.add_builtin_type( type_re, &transfer_proc )
end
#
# Add a transfer method for a builtin type
#
def YAML.add_ruby_type( type, &transfer_proc )
@@loader.add_ruby_type( type, &transfer_proc )
end
#
# Add a private document type
#
def YAML.add_private_type( type_re, &transfer_proc )
@@loader.add_private_type( type_re, &transfer_proc )
end
#
# Detect typing of a string
#
def YAML.detect_implicit( val )
@@loader.detect_implicit( val )
end
#
# Apply a transfer method to a Ruby object
#
def YAML.transfer( type_id, obj )
@@loader.transfer( type_id, obj )
end
#
# Apply any implicit a node may qualify for
#
def YAML.try_implicit( obj )
YAML.transfer( YAML.detect_implicit( obj ), obj )
end
#
# Method to extract colon-seperated type and class, returning
# the type and the constant of the class
#
def YAML.read_type_class( type, obj_class )
scheme, domain, type, tclass = type.split( ':', 4 )
tclass.split( "::" ).each { |c| obj_class = obj_class.const_get( c ) } if tclass
return [ type, obj_class ]
end
#
# Allocate blank object
#
def YAML.object_maker( obj_class, val, is_attr = false )
if Hash === val
name = obj_class.name
ostr = sprintf( "\004\006o:%c%s\000", name.length + 5, name )
if is_attr
ostr[ -1, 1 ] = Marshal.dump( val ).sub( /^[^{]+\{/, '' )
p ostr
end
o = ::Marshal.load( ostr )
unless is_attr
val.each_pair { |k,v|
o.instance_eval "@#{k} = v"
}
end
o
else
raise YAML::Error, "Invalid object explicitly tagged !ruby/Object: " + val.inspect
end
end
#
# Allocate an Emitter if needed
#
def YAML.quick_emit( oid, opts = {}, &e )
old_opt = nil
if opts[:Emitter].is_a? @@emitter
out = opts.delete( :Emitter )
old_opt = out.options.dup
out.options.update( opts )
else
out = @@emitter.new( opts )
end
aidx = out.start_object( oid )
if aidx
out.simple( "*#{ aidx }" )
else
e.call( out )
end
if old_opt.is_a? Hash
out.options = old_opt
end
out.end_object
end
end
require 'yaml/rubytypes'
require 'yaml/types'
#
# ryan: You know how Kernel.p is a really convenient way to dump ruby
# structures? The only downside is that it's not as legible as
# YAML.
#
# _why: (listening)
#
# ryan: I know you don't want to urinate all over your users' namespaces.
# But, on the other hand, convenience of dumping for debugging is,
# IMO, a big YAML use case.
#
# _why: Go nuts! Have a pony parade!
#
# ryan: Either way, I certainly will have a pony parade.
#
module Kernel
def y( x )
puts x.to_yaml
end
end
|
