Class: SemverDialects::SemanticVersion

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

Overview

SemanticVersion is a generic version class. It parses and compares versions of any syntax. It can’t always be accurate because a single comparison logic can’t possibly handle all the supported syntaxes. Since it’s generic, it doesn’t validate versions.

Constant Summary collapse

ANY_NUMBER = 
'x'
VERSION_PATTERN =

String to build a regexp that matches a version.

A version might start with a leading “v”, then it must have a digit, then it might have any sequence made of alphanumerical characters, underscores, dots, dashes, and wildcards.

'v?[0-9][a-zA-Z0-9_.*+-]*'
VERSION_ONLY_REGEXP =

Regexp for a string that only contains a single version string.

Regexp.new("\\A#{VERSION_PATTERN}\\z").freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(version_string) ⇒ SemanticVersion

Returns a new instance of SemanticVersion.

Raises:



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# File 'lib/semver_dialects/semantic_version.rb', line 28

def initialize(version_string)
  raise InvalidVersionError, version_string unless VERSION_ONLY_REGEXP.match version_string

  @version_string = version_string
  @prefix_segments = []
  @suffix_segments = []
  version, = version_string.delete_prefix('v').split('+')
  @segments = split_version_string!(version)
end

Instance Attribute Details

#prefix_segments ⇒ Object (readonly)

Returns the value of attribute prefix_segments.



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# File 'lib/semver_dialects/semantic_version.rb', line 16

def prefix_segments
  @prefix_segments
end

#segments ⇒ Object (readonly)

Returns the value of attribute segments.



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# File 'lib/semver_dialects/semantic_version.rb', line 16

def segments
  @segments
end

#suffix_segments ⇒ Object (readonly)

Returns the value of attribute suffix_segments.



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# File 'lib/semver_dialects/semantic_version.rb', line 16

def suffix_segments
  @suffix_segments
end

#version_string ⇒ Object (readonly)

Returns the value of attribute version_string.



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# File 'lib/semver_dialects/semantic_version.rb', line 16

def version_string
  @version_string
end

Instance Method Details

#<=>(other) ⇒ Object 



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# File 'lib/semver_dialects/semantic_version.rb', line 111

def <=>(other)
  return nil unless other.is_a?(SemanticVersion)

  self_array, other_array = get_equalized_arrays_for(self, other)
  zipped_arrays = self_array.zip(other_array)
  zipped_arrays.each do |(a, b)|
    return 0 if a.wildcard? || b.wildcard?

    cmp = a <=> b
    return cmp if cmp != 0
  end
  0
end

#_get_equalized_arrays_for(array_a, array_b) ⇒ Object 



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# File 'lib/semver_dialects/semantic_version.rb', line 74

def _get_equalized_arrays_for(array_a, array_b)
  first_array = array_a.clone
  second_array = array_b.clone
  if first_array.size < second_array.size
    (second_array.size - first_array.size).times do
      first_array << SemanticVersionSegment.new('0')
    end
  elsif first_array.size > second_array.size
    (first_array.size - second_array.size).times do
      second_array << SemanticVersionSegment.new('0')
    end
  end
  [first_array, second_array]
end

#get_equalized_arrays_for(semver_a, semver_b) ⇒ Object 



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# File 'lib/semver_dialects/semantic_version.rb', line 89

def get_equalized_arrays_for(semver_a, semver_b)
  first_array_prefix = semver_a.prefix_segments.clone
  second_array_prefix = semver_b.prefix_segments.clone
  first_array_suffix = semver_a.suffix_segments.clone
  second_array_suffix = semver_b.suffix_segments.clone
  first_array_prefix, second_array_prefix = _get_equalized_arrays_for(first_array_prefix, second_array_prefix)
  first_array_suffix, second_array_suffix = _get_equalized_arrays_for(first_array_suffix, second_array_suffix)
  [first_array_prefix.concat(first_array_suffix), second_array_prefix.concat(second_array_suffix)]
end

#is_zero? ⇒ Boolean

rubocop:todo Naming/PredicateName

Returns:

  • (Boolean) 


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# File 'lib/semver_dialects/semantic_version.rb', line 99

def is_zero? # rubocop:todo Naming/PredicateName
  @prefix_segments.empty? || @prefix_segments.all?(&:is_zero?)
end

#major ⇒ Object 



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# File 'lib/semver_dialects/semantic_version.rb', line 137

def major
  @prefix_segments.size >= 2 ? @prefix_segments[0].to_s : '0'
end

#minor ⇒ Object 



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# File 'lib/semver_dialects/semantic_version.rb', line 133

def minor
  @prefix_segments.size >= 1 ? @prefix_segments[1].to_s : '0'
end

#patch ⇒ Object 



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# File 'lib/semver_dialects/semantic_version.rb', line 141

def patch
  @prefix_segments.size >= 3 ? @prefix_segments[2].to_s : '0'
end

#post_release? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/semver_dialects/semantic_version.rb', line 107

def post_release?
  @suffix_segments.any?(&:is_post_release)
end

#pre_release? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/semver_dialects/semantic_version.rb', line 103

def pre_release?
  @suffix_segments.any?(&:is_pre_release)
end

#split_version_string!(version_string) ⇒ Object 



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# File 'lib/semver_dialects/semantic_version.rb', line 38

def split_version_string!(version_string)
  delim_pattern = /[.-]/
  split_array = version_string.split(delim_pattern).map do |grp|
    grp.split(/(\d+)/).reject { |cell| cell.nil? || cell.empty? }
  end.flatten

  # go as far to the right as possible considering numbers and placeholders
  prefix_delimiter = 0
  (0..split_array.size - 1).each do |i|
    break unless split_array[i].number? || split_array[i] == 'X' || split_array[i] == 'x'

    prefix_delimiter = i
  end

  # remove redundant trailing zeros
  prefix_delimiter.downto(0).each do |i|
    break unless split_array[i] == '0'

    split_array.delete_at(i)
    prefix_delimiter -= 1
  end

  unless prefix_delimiter.negative?
    @prefix_segments = split_array[0..prefix_delimiter].map do |group_string|
      SemanticVersionSegment.new(group_string)
    end
  end
  if split_array.size - 1 >= prefix_delimiter + 1
    @suffix_segments = split_array[prefix_delimiter + 1, split_array.size].map do |group_string|
      SemanticVersionSegment.new(group_string)
    end
  end

  @prefix_segments.clone.concat(@suffix_segments)
end

#to_normalized_s ⇒ Object 



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# File 'lib/semver_dialects/semantic_version.rb', line 125

def to_normalized_s
  @segments.map(&:to_normalized_s).join(':')
end

#to_s ⇒ Object 



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# File 'lib/semver_dialects/semantic_version.rb', line 129

def to_s
  @version_string
end