Class: Deprewriter::Diff

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source, rewritten_source, filepath, timestamp: Time.now) ⇒ Diff

Returns a new instance of Diff.



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# File 'lib/deprewriter/diff.rb', line 10

def initialize(source, rewritten_source, filepath, timestamp: Time.now)
  @source = source
  @rewritten_source = rewritten_source
  @filepath = filepath
  @timestamp = timestamp
end

Instance Attribute Details

#rewritten_source ⇒ Object (readonly)

Returns the value of attribute rewritten_source.



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# File 'lib/deprewriter/diff.rb', line 8

def rewritten_source
  @rewritten_source
end

Instance Method Details

#different? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/deprewriter/diff.rb', line 17

def different?
  @source != @rewritten_source
end

#id ⇒ Object 



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# File 'lib/deprewriter/diff.rb', line 36

def id
  "deprewriter_#{Digest::MD5.hexdigest(to_s)}.patch"
end

#to_s ⇒ Object 



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# File 'lib/deprewriter/diff.rb', line 21

def to_s
  @output ||= begin
    original_diff = Diffy::Diff.new(@source, @rewritten_source, include_diff_info: true, diff: "-u").to_s

    # Create a header to indicate a filepath since original_diff doesn't contain a correct filepath
    formatted_timestamp = @timestamp.strftime("%Y-%m-%d %H:%M:%S.%N %z")
    header = [
      "--- #{@filepath}\t#{formatted_timestamp}",
      "+++ #{@filepath}\t#{formatted_timestamp}"
    ].join("\n")

    [header, original_diff.lines[2..].join].join("\n")
  end
end