Class: PatternPatch::Patch

Inherits:
Object
  • Object
show all
Defined in:
lib/pattern_patch/patch.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Patch

Returns a new instance of Patch.

Raises:

  • (ArgumentError) 


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# File 'lib/pattern_patch/patch.rb', line 51

def initialize(options = {})
  raise ArgumentError, "text and text_file are mutually exclusive" if options[:text] && options[:text_file]

  @regexp = options[:regexp]
  @text_file = options[:text_file]

  if @text_file
    @text = File.read @text_file
  else
    @text = options[:text]
  end

  @mode = options[:mode] || :append
  @global = options[:global].nil? ? false : options[:global]
end

Instance Attribute Details

#global ⇒ Object

Returns the value of attribute global.



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# File 'lib/pattern_patch/patch.rb', line 10

def global
  @global
end

#mode ⇒ Object

Returns the value of attribute mode.



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# File 'lib/pattern_patch/patch.rb', line 9

def mode
  @mode
end

#regexp ⇒ Object

Returns the value of attribute regexp.



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# File 'lib/pattern_patch/patch.rb', line 7

def regexp
  @regexp
end

#text ⇒ Object

Returns the value of attribute text.



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# File 'lib/pattern_patch/patch.rb', line 8

def text
  @text
end

#text_file ⇒ Object

Returns the value of attribute text_file.



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# File 'lib/pattern_patch/patch.rb', line 11

def text_file
  @text_file
end

Class Method Details

.from_yaml(path) ⇒ Object 



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# File 'lib/pattern_patch/patch.rb', line 14

def from_yaml(path)
  hash = YAML.load_file(path).symbolize_keys

  # Adjust string fields from YAML

  if hash[:regexp].kind_of? String
    regexp_string = hash[:regexp]
    if (matches = %r{^/(.+)/([imx]*)$}.match regexp_string)
      flags = 0
      if matches[2] =~ /i/
        flags |= Regexp::IGNORECASE
      end
      if matches[2] =~ /x/
        flags |= Regexp::EXTENDED
      end
      if matches[2] =~ /m/
        flags |= Regexp::MULTILINE
      end
      hash[:regexp] = Regexp.new matches[1], flags
      puts "Regexp from YAML: #{hash[:regexp].inspect}"
    else
      hash[:regexp] = /#{regexp_string}/
    end
  end

  if hash[:mode].kind_of? String
    hash[:mode] = hash[:mode].to_sym
  end

  if hash[:text_file]
    hash[:text_file] = File.expand_path hash[:text_file], File.dirname(path)
  end

  new hash
end

Instance Method Details

#apply(files, options = {}) ⇒ Object 



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# File 'lib/pattern_patch/patch.rb', line 72

def apply(files, options = {})
  offset = options[:offset] || 0
  files = [files] if files.kind_of? String

  if options[:binding]
    patch_text = ERB.new(text).result(options[:binding])
  else
    patch_text = text
  end

  files.each do |path|
    modified = Utilities.apply_patch File.read(path),
                                     regexp,
                                     patch_text,
                                     global,
                                     mode,
                                     offset
    File.write path, modified
  end
end

#inspect ⇒ Object 



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# File 'lib/pattern_patch/patch.rb', line 114

def inspect
  "#<PatternPatch::Patch regexp=#{regexp.inspect} text=#{text.inspect} mode=#{mode.inspect} global=#{global.inspect}>"
end

#revert(files, options = {}) ⇒ Object 



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# File 'lib/pattern_patch/patch.rb', line 93

def revert(files, options = {})
  offset = options[:offset] || 0
  files = [files] if files.kind_of? String

  if options[:binding]
    patch_text = ERB.new(text).result(options[:binding])
  else
    patch_text = text
  end

  files.each do |path|
    modified = Utilities.revert_patch File.read(path),
                                      regexp,
                                      patch_text,
                                      global,
                                      mode,
                                      offset
    File.write path, modified
  end
end