Class: SmartDiff

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file_one, file_two) ⇒ SmartDiff

Create a SmartDiff object which will create diff of two source files based on AST generated by JRubyParser.

Parameters:

  • file_one (String) —

    The path to the first source file.

  • file_two (String) —

    The path to the second source file.



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# File 'lib/smart_diff.rb', line 20

def initialize(file_one, file_two)
  @file_one = file_one
  @file_two = file_two
  @node_diff = diff()
end

Instance Attribute Details

#code_one ⇒ Object

Returns the value of attribute code_one.



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# File 'lib/smart_diff.rb', line 9

def code_one
  @code_one
end

#code_two ⇒ Object

Returns the value of attribute code_two.



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# File 'lib/smart_diff.rb', line 9

def code_two
  @code_two
end

#file_one ⇒ Object

Returns the value of attribute file_one.



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# File 'lib/smart_diff.rb', line 9

def file_one
  @file_one
end

#file_two ⇒ Object

Returns the value of attribute file_two.



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# File 'lib/smart_diff.rb', line 9

def file_two
  @file_two
end

#node_diff ⇒ Object

Returns the value of attribute node_diff.



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# File 'lib/smart_diff.rb', line 9

def node_diff
  @node_diff
end

Instance Method Details

#diff ⇒ java.util.ArrayList<DeepDiff>

Create a diff of the two AST objects.

Returns:

  • (java.util.ArrayList<DeepDiff>) —

    The differences.



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# File 'lib/smart_diff.rb', line 67

def diff()
  @code_one = read(@file_one)
  @code_two = read(@file_two)
  if @code_one && @code_two
    nodeA = parse(@code_one, @file_one)
    nodeB = parse(@code_two, @file_two)
    nd = org.jrubyparser.util.diff.NodeDiff.new(nodeA, @code_one, nodeB, @code_two)
    nd.deep_diff
  end
end

#parse(code_to_parse, file_name) ⇒ org.jrubyparser.Node

Parse the source into an abstract syntax tree.

Parameters:

  • code_to_parse (String) —

    Ruby source code.

  • file_name (String) —

    The path to the file containing code_to_parse

Returns:

  • (org.jrubyparser.Node) —

    A Node object representing the code as AST.



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# File 'lib/smart_diff.rb', line 50

def parse(code_to_parse, file_name)
  begin
    JRubyParser.parse(code_to_parse, { :filename => file_name })
  rescue SyntaxException => e
    message = e.message
    message << "\nThis file, #{file_name} ,is not valid ruby."
    message << "\nCheck syntax and try again."
    se = SyntaxException.new(e.pid, e.position, message)
    raise se
  end
end

#read(file_name) ⇒ String

Read the source code into a string.

Parameters:

  • file_name (String) —

    the path to a file containing ruby source

Returns:

  • (String) —

    The code read in from the file path passed in.



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# File 'lib/smart_diff.rb', line 33

def read(file_name)
  path = Pathname.new(file_name).expand_path
  if path.exist?
    File.read path
  else
    raise "#{path} not found. Check the path."
  end
end