Class: SemanticVersion

Inherits:
Object show all
Includes:
Comparable
Defined in:
lib/epitools/semantic_version.rb

Constant Summary collapse

A_NEWER = 
1
B_NEWER = 
-1
A_EQ_B = 
0

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(val) ⇒ SemanticVersion

Returns a new instance of SemanticVersion.



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# File 'lib/epitools/semantic_version.rb', line 11

def initialize(val)
  @val = val
end

Instance Attribute Details

#val ⇒ Object (readonly)

Returns the value of attribute val.



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# File 'lib/epitools/semantic_version.rb', line 9

def val
  @val
end

Class Method Details

.compare(a, b) ⇒ Object 



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# File 'lib/epitools/semantic_version.rb', line 15

def self.compare(a,b)
  new(a) <=> new(b)
end

Instance Method Details

#<=>(other) ⇒ Object 



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# File 'lib/epitools/semantic_version.rb', line 19

def <=>(other)
  version_a, version_b = val, other.val

  return A_EQ_B if version_a == version_b

  chars_a, chars_b = version_a.chars, version_b.chars

  while chars_a.size != 0 and chars_b.size != 0
    # logger.debug('starting loop comparing %s '
    #        'to %s', chars_a, chars_b)
    check_leading(chars_a, chars_b)

    if chars_a.first == '~' and chars_b.first == '~'
      chars_a.shift
      chars_b.shift
    elsif chars_a.first == '~'
      return B_NEWER
    elsif chars_b.first == '~'
      return A_NEWER
    end

    break if chars_a.size == 0 or chars_b.size == 0

    block_res = get_block_result(chars_a, chars_b)
    return block_res if block_res != A_EQ_B
  end

  if chars_a.size == chars_b.size
    # logger.debug('versions are equal')
    return A_EQ_B
  else
    # logger.debug('versions not equal')
    chars_a.size > chars_b.size ? A_NEWER : B_NEWER
  end
end