Module: SemverDialects::IntervalParser

Defined in:
lib/semver_dialects/interval_parser.rb

Overview

rubocop:todo Style/Documentation

Constant Summary collapse

CONSTRAINT_REGEXP =

Version string validation is only validated not to be white space. All other version validation is delegated to the version parsers.

Regexp.new('(?<op>[><=]+)\s*(?<version>[^\s]+)').freeze

Class Method Summary collapse

Class Method Details

.parse(typ, versionstring) ⇒ Object 



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# File 'lib/semver_dialects/interval_parser.rb', line 23

def self.parse(typ, versionstring)
  if versionstring == '=*'
    # special case = All Versions
    return Interval.new(IntervalType::LEFT_OPEN | IntervalType::RIGHT_OPEN, BelowAll.new, AboveAll.new)
  end

  version_items = versionstring.split(' ')
  interval = Interval.new(IntervalType::LEFT_OPEN | IntervalType::RIGHT_OPEN, BelowAll.new, AboveAll.new)
  version_items.each do |version_item|
    matches = version_item.match CONSTRAINT_REGEXP
    raise InvalidConstraintError, versionstring if matches.nil?

    version = SemverDialects.parse_version(typ, matches[:version])
    boundary = Boundary.new(version)
    case matches[:op]
    when '>='
      new_interval = Interval.new(IntervalType::LEFT_CLOSED | IntervalType::RIGHT_OPEN, boundary, AboveAll.new)
      interval = interval.intersect(new_interval)
    when '<='
      new_interval = Interval.new(IntervalType::LEFT_OPEN | IntervalType::RIGHT_CLOSED, BelowAll.new, boundary)
      interval = interval.intersect(new_interval)
    when '<'
      new_interval = Interval.new(IntervalType::LEFT_OPEN | IntervalType::RIGHT_OPEN, BelowAll.new, boundary)
      interval = interval.intersect(new_interval)
    when '>'
      new_interval = Interval.new(IntervalType::LEFT_OPEN | IntervalType::RIGHT_OPEN, boundary, AboveAll.new)
      interval = interval.intersect(new_interval)
    when '=', '=='
      new_interval = Interval.new(IntervalType::LEFT_CLOSED | IntervalType::RIGHT_CLOSED, boundary, boundary)
      interval = interval.intersect(new_interval)
    end
  end
  interval
rescue InvalidVersionError
  raise InvalidConstraintError, versionstring
end