Class: Connect::Dsl

Inherits:
Racc::Parser show all
Extended by:
Forwardable
Defined in:
lib/connect/dsl.rb,
lib/connect/lexer.rb,
lib/connect/parser.rb

Overview

This class contains all methods called by the DSL parser

rubocop:disable ClassLength

Defined Under Namespace

Classes: ScanError

Constant Summary collapse

STATE_VARIABLES =

This instance variables are saved when pushing and popping parser state The parser is popped and pushed on includes

[
  :ss,
  :lineno,
  :current_file,
  :racc_state,
  :racc_t,
  :racc_val,
  :racc_read_next,
]
Racc_arg = 
[
racc_action_table,
racc_action_check,
racc_action_default,
racc_action_pointer,
racc_goto_table,
racc_goto_check,
racc_goto_default,
racc_goto_pointer,
racc_nt_base,
racc_reduce_table,
racc_token_table,
racc_shift_n,
racc_reduce_n,
racc_use_result_var ]
Racc_token_to_s_table = 
[
"$end",
"error",
"SCOPE",
"IDENTIFIER",
"INTEGER",
"FLOAT",
"\"-\"",
"\"+\"",
"connection",
"DO",
"\"{\"",
"END",
"\"}\"",
"DOUBLE_QUOTED",
"SINGLE_QUOTED",
"BOOLEAN",
"UNDEF",
"\",\"",
"\"^\"",
"\"*\"",
"\"/\"",
"OR",
"AND",
"\"[\"",
"\"]\"",
"DOUBLE_DOTS",
"\".\"",
"\"(\"",
"\")\"",
"\"&\"",
"\":\"",
"WITH",
"HASH_ROCKET",
"\"=\"",
"INCLUDE",
"INTO",
"IMPORT",
"FROM",
"TO",
"ITERATE",
"STEP",
"$start",
"dsl",
"config",
"number",
"assignment",
"include",
"import",
"object_definition",
"with",
"block_begin",
"block_end",
"literal",
"string",
"scalar",
"string_number_reference",
"reference",
"value",
"array",
"hash",
"object_reference",
"values",
"expression",
"parameters",
"parameter",
"selectors",
"selector",
"array_selector",
"function_selector",
"special_selector",
"with_scope_do",
"optional_comma",
"hashpairs",
"hashpair",
"hashkey",
"hash_seperator",
"import_with_scope_begin",
"import_with_scope_end",
"datasource",
"import_block",
"import_statements",
"import_statement",
"iterators",
"definition_block",
"iterator",
"step" ]
Racc_debug_parser = 
false

Constants inherited from Racc::Parser

Racc::Parser::Racc_Runtime_Core_Revision_R, Racc::Parser::Racc_Runtime_Core_Version_R, Racc::Parser::Racc_Runtime_Revision, Racc::Parser::Racc_Runtime_Version

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Racc::Parser

#_racc_do_parse_rb, #_racc_do_reduce, #_racc_evalact, #_racc_init_sysvars, #_racc_setup, #_racc_yyparse_rb, #do_parse, #on_error, #racc_accept, #racc_e_pop, #racc_next_state, #racc_print_stacks, #racc_print_states, #racc_read_token, #racc_reduce, racc_runtime_type, #racc_shift, #racc_token2str, #token_to_str, #yyaccept, #yyerrok, #yyerror, #yyparse

Constructor Details

#initialize(values_table = nil, objects_table = nil, interpolator = nil, includer = nil) ⇒ Dsl

Returns a new instance of Dsl.



104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
 
# File 'lib/connect/dsl.rb', line 104

def initialize(values_table    = nil,
                  objects_table = nil,
                  interpolator  = nil,
                  includer      = nil
                  )
  # @yydebug = true
  @values_table  = values_table || ValuesTable.new
  @objects_table = objects_table || ObjectsTable.new
  Connect::Entry::Base.values_table  = @values_table
  Connect::Entry::Base.objects_table = @objects_table
  @interpolator  = interpolator || Interpolator.new(self)
  @includer      = includer || Includer.new
  @include_stack = []
  @current_scope = []
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



68
69
70
 
# File 'lib/connect/dsl.rb', line 68

def config
  @config
end

#current_file ⇒ Object (readonly)

Returns the value of attribute current_file.



68
69
70
 
# File 'lib/connect/dsl.rb', line 68

def current_file
  @current_file
end

#filename ⇒ Object (readonly)

Returns the value of attribute filename.



16
17
18
 
# File 'lib/connect/lexer.rb', line 16

def filename
  @filename
end

#interpolator ⇒ Object (readonly)

Returns the value of attribute interpolator.



68
69
70
 
# File 'lib/connect/dsl.rb', line 68

def interpolator
  @interpolator
end

#lineno ⇒ Object (readonly)

Returns the value of attribute lineno.



15
16
17
 
# File 'lib/connect/lexer.rb', line 15

def lineno
  @lineno
end

#state ⇒ Object

Returns the value of attribute state.



17
18
19
 
# File 'lib/connect/lexer.rb', line 17

def state
  @state
end

Class Method Details

.config ⇒ Object 



92
93
94
 
# File 'lib/connect/dsl.rb', line 92

def config
  @config ||= Config.new
end

.instance(include_dir) ⇒ Object

Coveneance function to create a dsl object for a specfic include directory



99
100
101
102
 
# File 'lib/connect/dsl.rb', line 99

def self.instance(include_dir)
  includer = Includer.new(include_dir)
  new(nil, nil, nil, includer)
end

Instance Method Details

#_next_token ⇒ Object 



56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
 
# File 'lib/connect/lexer.rb', line 56

def _next_token
  text = @ss.peek(1)
  @lineno  +=  1  if text == "\n"
  token = case @state
  when nil
    case
    when (text = @ss.scan(/\n/))
      ;

    when (text = @ss.scan(/\#.*\n/))
       action { @lineno += 1; nil}

    when (text = @ss.scan(/\#.*$/))
      ;

    when (text = @ss.scan(/iterate\s/))
       action { [:ITERATE, text]}

    when (text = @ss.scan(/step\s/))
       action { [:STEP, text]}

    when (text = @ss.scan(/or\s|(\|\|)/))
       action { [:OR, text]}

    when (text = @ss.scan(/and\s|\&\&/))
       action { [:AND, text]}

    when (text = @ss.scan(/do\s/))
       action { [:DO, text]}

    when (text = @ss.scan(/end\s/))
       action { [:END, text]}

    when (text = @ss.scan(/from\s/))
       action { [:FROM, text]}

    when (text = @ss.scan(/to\s/))
       action { [:TO, text]}

    when (text = @ss.scan(/import\s/))
       action { [:IMPORT, text]}

    when (text = @ss.scan(/into\s/))
       action { [:INTO, text]}

    when (text = @ss.scan(/with\s/))
       action { [:WITH, text]}

    when (text = @ss.scan(/include\s/))
       action { [:INCLUDE, text] }

    when (text = @ss.scan(/TRUE|true/))
       action { [:BOOLEAN, true]}

    when (text = @ss.scan(/FALSE|false/))
       action { [:BOOLEAN, false]}

    when (text = @ss.scan(/undefined|undef|nil/))
       action { [:UNDEF, nil]}

    when (text = @ss.scan(/(?:(?:[a-zA-Z][a-zA-Z0-9_]*)?::)+/))
       action { [:SCOPE, text]}

    when (text = @ss.scan(/[a-zA-Z][a-zA-Z0-9_]*/))
       action { [:IDENTIFIER, text] }

    when (text = @ss.scan(/\=\>/))
       action { [:HASH_ROCKET, text]}

    when (text = @ss.scan(/[0-9]+\.[0-9]+/))
       action { [:FLOAT, text.to_f] }

    when (text = @ss.scan(/[0-9]+/))
       action { [:INTEGER, text.to_i] }

    when (text = @ss.scan(/\"(\\.|[^\\"])*\"/))
       action { [:DOUBLE_QUOTED, dequote(text)]}

    when (text = @ss.scan(/\'(\\.|[^\\'])*\'/))
       action { [:SINGLE_QUOTED, dequote(text)]}

    when (text = @ss.scan(/\.\./))
       action { [:DOUBLE_DOTS, text]}

    when (text = @ss.scan(/[\s|\t]+/))
      ;

    when (text = @ss.scan(/./))
       action { [text, text] }

    else
      text = @ss.string[@ss.pos .. -1]
      raise  ScanError, "can not match: '" + text + "'"
    end  # if

  else
    raise  ScanError, "undefined state: '" + state.to_s + "'"
  end  # case state
  token
end

#_reduce_none(val, _values, result) ⇒ Object 



1000
1001
1002
 
# File 'lib/connect/parser.rb', line 1000

def _reduce_none(val, _values, result)
  val[0]
end

#action ⇒ Object 



25
26
27
 
# File 'lib/connect/lexer.rb', line 25

def action
  yield
end

#add_objects_with_iterators(type, name, values, xdef, iterators) ⇒ Object 



233
234
235
236
237
238
239
240
241
242
243
244
 
# File 'lib/connect/dsl.rb', line 233

def add_objects_with_iterators(type, name, values, xdef, iterators)
  iterator_values = {}
  iterators.each_pair {|k,v| iterator_values[k] = values_from_iterator(v,k)}
  max_size  = iterator_values.collect{|k,v| v.size}.max
  iterator_values.each_pair {|k,v| iterator_values[k] = v * ((max_size/v.size) + (max_size % v.size))}
  (0..max_size).each do | index|
    value_hash = iterator_values.keys.reduce({}) {|v,k| v.merge!({k.to_sym => iterator_values[k][index]})}
    object_name   = name % value_hash
    object_values = substitute_values(values, value_hash)
    add_object(type, object_name, object_values, xdef)
  end
end

#assign(name, value, xdef = nil) ⇒ Object

Assign the value to the name

Parameters:

  • name (String) —

    the name of the assignment

  • value (Any) —

    the value of the assignment



126
127
128
129
130
131
132
133
134
135
 
# File 'lib/connect/dsl.rb', line 126

def assign(name, value, xdef = nil)
  if value.is_a?(Connect::Entry::Base)
    Connect.debug "Assign #{value.inspect} to #{name}."
  else
    Connect.debug "Assign #{value} to #{name}."
  end
  name = scoped_name_for(name)
  entry = ValuesTable.value_entry(name, value, nil, xdef)
  add_value(entry)
end

#datasource(name, *parameters) ⇒ Object

create a datasource with the specfied name. A datasource object will be created who’s type is Connect::Datasources::name. The Puppet autoloader will try to locate this object in any of the loaded gems and modules.

When it is found, it is initialized whit the name and the passed parameters

Parameters:

  • name (String) —

    the name of the datasource

  • parameters (Array) —

    an arry of parameters to pass to the datasource



193
194
195
196
197
198
199
200
201
202
203
 
# File 'lib/connect/dsl.rb', line 193

def datasource(name, *parameters)
  Connect.debug "Loading datasource #{name}"
  source_name = name.to_s.split('_').collect(&:capitalize).join # Camelize
  klass_name = "Connect::Datasources::#{source_name}"
  klass = Puppet::Pops::Types::ClassLoader.provide_from_string(klass_name)
  if klass
    @current_importer = klass.new(name, *parameters)
  else
    fail ArgumentError, "specfied importer '#{name}' doesn't exist"
  end
end

#define_object(type, name, values = nil, iterators = nil, xdef = nil) ⇒ Object

Define an object. If the values is empty, this method returns just the values. It the values parameter is set, a new entry will be added to the objects table



221
222
223
224
225
226
227
228
229
230
231
 
# File 'lib/connect/dsl.rb', line 221

def define_object(type, name, values = nil, iterators = nil, xdef = nil)
  Connect.debug("Defining object #{name} as type #{type}.")
  fail ArgumentError, 'Iterators only allowed with block definition' if values.nil? && !iterators.nil?
  validate_iterators(iterators) unless iterators.nil?
  if iterators
    add_objects_with_iterators(type, name, values, xdef, iterators)
  else
    add_object(type, name, values, xdef) if values
  end
  Entry::ObjectReference.new(type, name, nil, xdef)
end

#dequote(line) ⇒ Object

def _next_token



157
158
159
160
 
# File 'lib/connect/lexer.rb', line 157

def dequote(line)
  line.chop![0] = ''
  line
end

#import(variable_name, lookup) ⇒ Object

Import the specified data into the values list



209
210
211
212
213
214
 
# File 'lib/connect/dsl.rb', line 209

def import(variable_name, lookup)
  Connect.debug "Importing variable #{variable_name}."
  fail 'no current importer' unless @current_importer
  value = @current_importer.lookup(lookup)
  assign(variable_name, value)
end

#include_file(names, scope = nil) ⇒ Object

include the specfied file in the parse process.



170
171
172
173
174
175
176
177
178
179
180
 
# File 'lib/connect/dsl.rb', line 170

def include_file(names, scope = nil)
  in_scope(scope) do
    @includer.include(names) do |content, file_name|
      push_current_parse_state
      @current_file = file_name
      Connect.debug "parsing Connect config file #{file_name}."
      scan_str(content) unless empty_definition?(content)
      pop_current_parse_state
    end
  end
end

#load_file(filename) ⇒ Object 



35
36
37
38
39
40
 
# File 'lib/connect/lexer.rb', line 35

def load_file( filename )
  @filename = filename
  open(filename, "r") do |f|
    scan_setup(f.read)
  end
end

#lookup_objects(type, keys) ⇒ Object 



137
138
139
140
141
142
143
 
# File 'lib/connect/dsl.rb', line 137

def lookup_objects(type, keys)
  @objects_table.entries(type, keys).reduce([]) do | c, v | 
    type = v[0]
    name = v[1]
    c << [type, lookup_object(type, name).full_representation]
  end
end

#lookup_values(keys) ⇒ Object 



145
146
147
 
# File 'lib/connect/dsl.rb', line 145

def lookup_values(keys)
  @values_table.entries(keys).reduce([]) {| c, v| c << [v,lookup_value(v)]}
end

#next_token ⇒ Object 



48
49
50
51
52
53
54
 
# File 'lib/connect/lexer.rb', line 48

def next_token
  return if @ss.eos?
  
  # skips empty actions
  until token = _next_token or @ss.eos?; end
  token
end

#pop_scope ⇒ Object

Pop’s the last scope from the stack



269
270
271
 
# File 'lib/connect/dsl.rb', line 269

def pop_scope
  @current_scope.pop
end

#push_scope(scope) ⇒ Object

Push the current variable scope to the stack.

Parameters:

  • scope (String) —

    the new scope scope



261
262
263
 
# File 'lib/connect/dsl.rb', line 261

def push_scope(scope)
  @current_scope << scope unless scope.nil?
end

#reference(parameter, xref = nil) ⇒ Object

Connect the variable to an other variable in the value table



162
163
164
165
 
# File 'lib/connect/dsl.rb', line 162

def reference(parameter, xref = nil)
  value_reference(parameter, xref)
  Entry::Reference.new(parameter, nil, xref)
end

#reference_object(type, name, xref = nil) ⇒ Object

Create an object reference.



251
252
253
254
 
# File 'lib/connect/dsl.rb', line 251

def reference_object(type, name, xref = nil)
  object_reference(type,name, xref)
  Entry::ObjectReference.new(type, name, nil, xref)
end

#scan_file(filename) ⇒ Object 



42
43
44
45
 
# File 'lib/connect/lexer.rb', line 42

def scan_file( filename )
  load_file(filename)
  do_parse
end

#scan_setup(str) ⇒ Object 



19
20
21
22
23
 
# File 'lib/connect/lexer.rb', line 19

def scan_setup(str)
  @ss = StringScanner.new(str)
  @lineno =  1
  @state  = nil
end

#scan_str(str) ⇒ Object Also known as: scan 



29
30
31
32
 
# File 'lib/connect/lexer.rb', line 29

def scan_str(str)
  scan_setup(str)
  do_parse
end

#selector(value, selector) ⇒ Object

Add the selector to the last object



153
154
155
156
 
# File 'lib/connect/dsl.rb', line 153

def selector(value, selector)
  value.selector = selector
  value
end

#to_param(parameters) ⇒ Object

Translate strings in a set of parameters to quoted strings

Parameters:

  • parameters (Array) —

    the set of parameters to recieve from the parser



279
280
281
282
 
# File 'lib/connect/dsl.rb', line 279

def to_param(parameters)
  parameters = [parameters] unless parameters.is_a?(Array)
  parameters.collect { |p| p.is_a?(String) ? "'#{p}'" : p }.join(',')
end

#tokenize(code) ⇒ Object 



161
162
163
164
165
166
167
168
 
# File 'lib/connect/lexer.rb', line 161

def tokenize(code)
  scan_setup(code)
  tokens = []
  while token = next_token
    tokens << token
  end
  tokens
end

#xdef ⇒ Object 



288
289
290
 
# File 'lib/connect/dsl.rb', line 288

def xdef
  Xdef.new(current_file, lineno)
end

#xref ⇒ Object 



284
285
286
 
# File 'lib/connect/dsl.rb', line 284

def xref
  Xref.new(current_file, lineno)
end