Class: IniFile

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/inifile.rb

Overview

This class represents the INI file and can be used to parse, modify, and write INI files.

Defined Under Namespace

Classes: Error

Constant Summary collapse

VERSION =
'2.0.2'

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(content = nil, opts = {}) ⇒ IniFile

Public: Create a new INI file from the given content String which contains the INI file lines. If the content are omitted, then the :filename option is used to read in the content of the INI file. If neither the content for a filename is provided then an empty INI file is created.

content - The String containing the INI file contents opts - The Hash of options (default: {})

:comment   - String containing the comment character(s)
:parameter - String used to separate parameter and value
:encoding  - Encoding String for reading / writing (Ruby 1.9)
:escape    - Boolean used to control character escaping
:default   - The String name of the default global section
:filename  - The filename as a String

Examples

IniFile.new
#=> an empty IniFile instance

IniFile.new( "[global]\nfoo=bar" )
#=> an IniFile instance

IniFile.new( :filename => 'file.ini', :encoding => 'UTF-8' )
#=> an IniFile instance

IniFile.new( "[global]\nfoo=bar", :comment => '#' )
#=> an IniFile instance


76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
# File 'lib/inifile.rb', line 76

def initialize( content = nil, opts = {} )
  opts, content = content, nil if Hash === content

  @content = content

  @comment  = opts.fetch(:comment, ';#')
  @param    = opts.fetch(:parameter, '=')
  @encoding = opts.fetch(:encoding, nil)
  @escape   = opts.fetch(:escape, true)
  @default  = opts.fetch(:default, 'global')
  @filename = opts.fetch(:filename, nil)

  @ini = Hash.new {|h,k| h[k] = Hash.new}

  if    @content  then parse!
  elsif @filename then read
  end
end

Instance Attribute Details

#encodingObject

Get and set the encoding (Ruby 1.9)



42
43
44
# File 'lib/inifile.rb', line 42

def encoding
  @encoding
end

#escapeObject

Enable or disable character escaping



45
46
47
# File 'lib/inifile.rb', line 45

def escape
  @escape
end

#filenameObject

Get and set the filename



39
40
41
# File 'lib/inifile.rb', line 39

def filename
  @filename
end

Class Method Details

.load(filename, opts = {}) ⇒ Object

Public: Open an INI file and load the contents.

filename - The name of the fiel as a String opts - The Hash of options (default: {})

:comment   - String containing the comment character(s)
:parameter - String used to separate parameter and value
:encoding  - Encoding String for reading / writing (Ruby 1.9)
:escape    - Boolean used to control character escaping
:default   - The String name of the default global section

Examples

IniFile.load('file.ini')
#=> IniFile instance

IniFile.load('does/not/exist.ini')
#=> nil

Returns an IniFile intsnace or nil if the file could not be opened.



33
34
35
36
# File 'lib/inifile.rb', line 33

def self.load( filename, opts = {} )
  return unless File.file? filename
  new(opts.merge(:filename => filename))
end

Instance Method Details

#[](section) ⇒ Object

Public: Get the section Hash by name. If the section does not exist, then it will be created.

section - The section name as a String.

Examples

inifile['global']
#=> global section Hash

Returns the Hash of parameter/value pairs for this section.



276
277
278
279
# File 'lib/inifile.rb', line 276

def []( section )
  return nil if section.nil?
  @ini[section.to_s]
end

#[]=(section, value) ⇒ Object

Public: Set the section to a hash of parameter/value pairs.

section - The section name as a String. value - The Hash of parameter/value pairs.

Examples

inifile['tenderloin'] = { 'gritty' => 'yes' }
#=> { 'gritty' => 'yes' }

Returns the value Hash.



293
294
295
# File 'lib/inifile.rb', line 293

def []=( section, value )
  @ini[section.to_s] = value
end

#cloneObject

Public: Produces a duplicate of this IniFile. The duplicate is independent of the original – i.e. the duplicate can be modified without changing the original. The tainted state and the frozen state of the original is copied to the duplicate.

Returns a new IniFile.



375
376
377
378
379
# File 'lib/inifile.rb', line 375

def clone
  other = dup
  other.freeze if self.frozen?
  other
end

#delete_section(section) ⇒ Object

Public: Remove a section identified by name from the IniFile.

section - The section name as a String.

Returns the deleted section Hash.



260
261
262
# File 'lib/inifile.rb', line 260

def delete_section( section )
  @ini.delete section.to_s
end

#dupObject

Public: Produces a duplicate of this IniFile. The duplicate is independent of the original – i.e. the duplicate can be modified without changing the original. The tainted state of the original is copied to the duplicate.

Returns a new IniFile.



360
361
362
363
364
365
366
# File 'lib/inifile.rb', line 360

def dup
  other = super
  other.instance_variable_set(:@ini, Hash.new {|h,k| h[k] = Hash.new})
  @ini.each_pair {|s,h| other[s].merge! h}
  other.taint if self.tainted?
  other
end

#eachObject

Public: Yield each INI file section, parameter, and value in turn to the given block.

block - The block that will be iterated by the each method. The block will

be passed the current section and the parameter / value pair.

Examples

inifile.each do |section, parameter, value|
  puts "#{parameter} = #{value} [in section - #{section}]"
end

Returns this IniFile.



225
226
227
228
229
230
231
232
233
# File 'lib/inifile.rb', line 225

def each
  return unless block_given?
  @ini.each do |section,hash|
    hash.each do |param,val|
      yield section, param, val
    end
  end
  self
end

#each_sectionObject

Public: Yield each section in turn to the given block.

block - The block that will be iterated by the each method. The block will

be passed the current section as a Hash.

Examples

inifile.each_section do |section|
  puts section.inspect
end

Returns this IniFile.



248
249
250
251
252
# File 'lib/inifile.rb', line 248

def each_section
  return unless block_given?
  @ini.each_key {|section| yield section}
  self
end

#eql?(other) ⇒ Boolean Also known as: ==

Public: Compare this IniFile to some other IniFile. For two INI files to be equivalent, they must have the same sections with the same parameter / value pairs in each section.

other - The other IniFile.

Returns true if the INI files are equivalent and false if they differ.

Returns:

  • (Boolean)


389
390
391
392
393
# File 'lib/inifile.rb', line 389

def eql?( other )
  return true if equal? other
  return false unless other.instance_of? self.class
  @ini == other.instance_variable_get(:@ini)
end

#freezeObject

Public: Freeze the state of this IniFile object. Any attempts to change the object will raise an error.

Returns this IniFile.



335
336
337
338
339
340
# File 'lib/inifile.rb', line 335

def freeze
  super
  @ini.each_value {|h| h.freeze}
  @ini.freeze
  self
end

#has_section?(section) ⇒ Boolean

Public: Check to see if the IniFile contains the section.

section - The section name as a String.

Returns true if the section exists in the IniFile.

Returns:

  • (Boolean)


320
321
322
# File 'lib/inifile.rb', line 320

def has_section?( section )
  @ini.has_key? section.to_s
end

#match(regex) ⇒ Object

Public: Create a Hash containing only those INI file sections whose names match the given regular expression.

regex - The Regexp used to match section names.

Examples

inifile.match(/^tree_/)
#=> Hash of matching sections

Return a Hash containing only those sections that match the given regular expression.



310
311
312
# File 'lib/inifile.rb', line 310

def match( regex )
  @ini.dup.delete_if { |section, _| section !~ regex }
end

#merge(other) ⇒ Object

Public: Creates a copy of this inifile with the entries from the other_inifile merged into the copy.

other - The other IniFile.

Returns a new IniFile.



180
181
182
# File 'lib/inifile.rb', line 180

def merge( other )
  self.dup.merge!(other)
end

#merge!(other) ⇒ Object

Public: Merges other_inifile into this inifile, overwriting existing entries. Useful for having a system inifile with user over-ridable settings elsewhere.

other - The other IniFile.

Returns this IniFile.



192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
# File 'lib/inifile.rb', line 192

def merge!( other )
  my_keys = @ini.keys
  other_keys =
      case other
      when IniFile; other.instance_variable_get(:@ini).keys
      when Hash; other.keys
      else raise "cannot merge contents from '#{other.class.name}'" end

  (my_keys & other_keys).each do |key|
    @ini[key].merge!(other[key])
  end

  (other_keys - my_keys).each do |key|
    @ini[key] = other[key]
  end

  self
end

#read(opts = {}) ⇒ Object Also known as: restore

Public: Read the contents of the INI file from the file system and replace and set the state of this IniFile instance. If left unspecified the currently configured filename and encoding will be used when reading from the file system. Otherwise the filename and encoding can be specified in the options hash.

opts - The default options Hash

:filename - The filename as a String
:encoding - The encoding as a String (Ruby 1.9)

Returns this IniFile instance if the read was successful; nil is returned if the file could not be read.



137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
# File 'lib/inifile.rb', line 137

def read( opts = {} )
  filename = opts.fetch(:filename, @filename)
  encoding = opts.fetch(:encoding, @encoding)
  return unless File.file? filename

  mode = (RUBY_VERSION >= '1.9' && encoding) ?
         "r:#{encoding.to_s}" :
         'r'
  fd = File.open(filename, mode)
  @content = fd.read

  parse!
  self
ensure
  fd.close if fd && !fd.closed?
end

#sectionsObject

Returns an Array of section names contained in this IniFile.



326
327
328
# File 'lib/inifile.rb', line 326

def sections
  @ini.keys
end

#taintObject

Public: Mark this IniFile as tainted – this will traverse each section marking each as tainted.

Returns this IniFile.



347
348
349
350
351
352
# File 'lib/inifile.rb', line 347

def taint
  super
  @ini.each_value {|h| h.taint}
  @ini.taint
  self
end

#to_hObject

Returns this IniFile converted to a Hash.



169
170
171
# File 'lib/inifile.rb', line 169

def to_h
  @ini.dup
end

#to_sObject

Returns this IniFile converted to a String.



157
158
159
160
161
162
163
164
165
# File 'lib/inifile.rb', line 157

def to_s
  s = []
  @ini.each do |section,hash|
    s << "[#{section}]"
    hash.each {|param,val| s << "#{param} #{@param} #{escape_value val}"}
    s << ""
  end
  s.join("\n")
end

#write(opts = {}) ⇒ Object Also known as: save

Public: Write the contents of this IniFile to the file system. If left unspecified, the currently configured filename and encoding will be used. Otherwise the filename and encoding can be specified in the options hash.

opts - The default options Hash

:filename - The filename as a String
:encoding - The encoding as a String (Ruby 1.9)

Returns this IniFile instance.



105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
# File 'lib/inifile.rb', line 105

def write( opts = {} )
  filename = opts.fetch(:filename, @filename)
  encoding = opts.fetch(:encoding, @encoding)
  mode = (RUBY_VERSION >= '1.9' && encoding) ?
       "w:#{encoding.to_s}" :
       'w'

  File.open(filename, mode) do |f|
    @ini.each do |section,hash|
      f.puts "[#{section}]"
      hash.each {|param,val| f.puts "#{param} #{@param} #{escape_value val}"}
      f.puts
    end
  end

  self
end