Module: Vers::MavenVersion

Defined in:
lib/vers/maven_version.rb

Defined Under Namespace

Classes: MavenComponent

Constant Summary collapse

QUALIFIER_ORDER = 
{
  "alpha" => 1,
  "beta" => 2,
  "milestone" => 3,
  "rc" => 4,
  "snapshot" => 5,
  "" => 6,
  "sp" => 7
}.freeze
UNKNOWN_QUALIFIER_ORDER = 
8

Class Method Summary collapse

Class Method Details

.compare(a, b) ⇒ Object 



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# File 'lib/vers/maven_version.rb', line 25

def compare(a, b)
  return 0 if a == b

  parts_a = parse_maven_version(a)
  parts_b = parse_maven_version(b)

  max_len = [parts_a.length, parts_b.length].max

  max_len.times do |i|
    comp_a = i < parts_a.length ? parts_a[i] : MavenComponent.new(is_null: true)
    comp_b = i < parts_b.length ? parts_b[i] : MavenComponent.new(is_null: true)

    cmp = compare_components(comp_a, comp_b)
    return cmp unless cmp == 0
  end

  0
end

.compare_components(a, b) ⇒ Object 



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# File 'lib/vers/maven_version.rb', line 154

def compare_components(a, b)
  return 0 if a.is_null && b.is_null

  if a.is_null
    return compare_to_null(b) * -1
  end
  if b.is_null
    return compare_to_null(a)
  end

  if a.after_dash != b.after_dash
    if a.after_dash
      return b.is_numeric ? -1 : 1
    else
      return a.is_numeric ? 1 : -1
    end
  end

  if a.is_numeric && b.is_numeric
    return a.numeric <=> b.numeric
  end

  if a.is_numeric && !b.is_numeric
    return 1
  end
  if !a.is_numeric && b.is_numeric
    return -1
  end

  order_a = qualifier_order(a.qualifier)
  order_b = qualifier_order(b.qualifier)

  if order_a != order_b
    return order_a <=> order_b
  end

  known_a = QUALIFIER_ORDER.key?(a.qualifier)
  known_b = QUALIFIER_ORDER.key?(b.qualifier)

  if !known_a && !known_b
    return a.qualifier <=> b.qualifier
  end

  0
end

.compare_to_null(comp) ⇒ Object 



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# File 'lib/vers/maven_version.rb', line 200

def compare_to_null(comp)
  if comp.is_numeric
    if comp.numeric == 0
      0
    else
      1
    end
  else
    order_comp = qualifier_order(comp.qualifier)
    order_null = QUALIFIER_ORDER[""]
    order_comp <=> order_null
  end
end

.normalize_components(components) ⇒ Object 



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# File 'lib/vers/maven_version.rb', line 132

def normalize_components(components)
  return components if components.empty?

  first_sublist_idx = components.index { |c| c.after_dash }

  if first_sublist_idx && first_sublist_idx > 0
    base_end = first_sublist_idx
    while base_end > 1 && components[base_end - 1].is_numeric && components[base_end - 1].numeric == 0
      base_end -= 1
    end
    if base_end < first_sublist_idx
      components = components[0...base_end] + components[first_sublist_idx..]
    end
  elsif first_sublist_idx.nil?
    while components.length > 0 && components.last.is_numeric && components.last.numeric == 0
      components.pop
    end
  end

  components
end

.normalize_qualifier(q, next_is_digit) ⇒ Object 



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# File 'lib/vers/maven_version.rb', line 116

def normalize_qualifier(q, next_is_digit)
  if next_is_digit && q.length == 1
    case q
    when "a" then return "alpha"
    when "b" then return "beta"
    when "m" then return "milestone"
    end
  end

  case q
  when "cr" then "rc"
  when "ga", "final", "release" then ""
  else q
  end
end

.parse_maven_version(s) ⇒ Object 



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# File 'lib/vers/maven_version.rb', line 44

def parse_maven_version(s)
  s = s.downcase

  parts, after_dash_flags = split_with_separators(s)

  result = []
  parts.each_with_index do |part, i|
    next if part.empty?

    next_is_digit = if i + 1 < parts.length
                      parts[i + 1].match?(/\A\d+\z/)
                    else
                      false
                    end

    normalized = normalize_qualifier(part, next_is_digit)
    next if normalized.empty?

    after_dash = i < after_dash_flags.length ? after_dash_flags[i] : false

    if normalized.match?(/\A\d+\z/)
      result << MavenComponent.new(is_numeric: true, numeric: normalized.to_i, after_dash: after_dash)
    else
      result << MavenComponent.new(qualifier: normalized, after_dash: after_dash)
    end
  end

  normalize_components(result)
end

.qualifier_order(q) ⇒ Object 



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# File 'lib/vers/maven_version.rb', line 214

def qualifier_order(q)
  QUALIFIER_ORDER.fetch(q, UNKNOWN_QUALIFIER_ORDER)
end

.split_with_separators(s) ⇒ Object 



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# File 'lib/vers/maven_version.rb', line 74

def split_with_separators(s)
  parts = []
  after_dash = []
  current = +""
  last_was_digit = false
  first_char = true
  current_after_dash = false

  s.each_char do |c|
    if c == "." || c == "-"
      if current.length > 0
        parts << current
        after_dash << current_after_dash
        current = +""
      end
      current_after_dash = (c == "-")
      first_char = true
      next
    end

    is_digit = c >= "0" && c <= "9"

    if !first_char && is_digit != last_was_digit && current.length > 0
      parts << current
      after_dash << current_after_dash
      current = +""
      current_after_dash = true
    end

    current << c
    last_was_digit = is_digit
    first_char = false
  end

  if current.length > 0
    parts << current
    after_dash << current_after_dash
  end

  [parts, after_dash]
end