Class: Prick::Diff

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

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(db1, db2) ⇒ Diff

Returns a new instance of Diff.



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# File 'lib/prick/diff.rb', line 3

def initialize(db1, db2)
  @db1, @db2 = db1, db2
  @diffed = false
  @diff = nil
  @result = nil
end

Class Method Details

.same?(db1, db2) ⇒ Boolean

Returns:

  • (Boolean) 


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

def self.same?(db1, db2) Diff.new(db1, db2).same? end

Instance Method Details

#read ⇒ Object

Return the diff between the two databases or nil if they’re equal



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# File 'lib/prick/diff.rb', line 20

def read
  @diffed ? @diff : do_diff
end

#same? ⇒ Boolean

Return true if the two databases are equal. Named #same? to avoid name collision with the built in #equal?

Returns:

  • (Boolean) 


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# File 'lib/prick/diff.rb', line 14

def same?
  do_diff if @result.nil?
  @result
end

#write(file) ⇒ Object

Write the diff between the databases to the given file. Return true if the databases are equal



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# File 'lib/prick/diff.rb', line 26

def write(file)
  if @diffed
    IO.write(file, @diff)
  else
    do_diff(file)
  end
  @result
end