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# frozen_string_literal: true
require 'strscan'
module SemverDialects
module Maven
ALPHA = -5
BETA = -4
MILESTONE = -3
RC = -2
SNAPSHOT = -1
SP = 'sp'
class Version < BaseVersion # rubocop:todo Style/Documentation
attr_accessor :addition
# Return an array similar to the one Maven generates when parsing versions.
#
# $ java -jar ${MAVEN_HOME}/lib/maven-artifact-3.9.6.jar 1a1
# Display parameters as parsed by Maven (in canonical form and as a list of tokens) and comparison result:
# 1. 1a1 -> 1-alpha-1; tokens: [1, [alpha, [1]]]
#
def to_a
return tokens if addition.nil?
tokens.clone.append(addition.to_a)
end
def to_s(as_addition = false) # rubocop:disable Style/OptionalBooleanParameter
s = ''
if tokens.any?
s += '-' if as_addition
s += tokens.map do |token|
case token
when String
token
when Integer
case token
when ALPHA
'alpha'
when BETA
'beta'
when MILESTONE
'milestone'
when RC
'rc'
when SNAPSHOT
'snapshot'
else
token.to_s
end
end
end.join('.')
end
s += addition.to_s(true) if addition
s
end
private
# Compare tokens as specified in https://maven.apache.org/pom.html#version-order-specification.
# Negative integers are alpha, beta, milestone, rc, and snapshot qualifiers.
# Special qualifier "sp" is right after GA and before any lexical or numeric token.
# Strings should be converted to lower case before being compared by this method.
# 1-a0 == 1-alpha < 1-0 == 1 == 1final == 1 ga < 1sp < 1-a < 1-1
def compare_token_pair(a = 0, b = 0) # rubocop:todo Naming/MethodParameterName
a ||= 0
b ||= 0
if a.is_a?(Integer) && b.is_a?(String)
return a <= 0 ? -1 : 1
end
if a.is_a?(String) && b.is_a?(Integer)
return b <= 0 ? 1 : -1
end
return -1 if a == SP && b.is_a?(String) && b != SP
return 1 if b == SP && a.is_a?(String) && a != SP
# Identifiers have both the same type.
# This returns nil if the identifiers can't be compared.
a <=> b
end
def empty_addition
Version.new([])
end
end
class VersionParser # rubocop:todo Style/Documentation
def self.parse(input)
new(input).parse
end
attr_reader :input
def initialize(input)
@input = input
end
def parse
@scanner = StringScanner.new(input.downcase)
@version = Version.new([])
@result = @version
parse_version(false)
raise InvalidVersionError, input if @result.to_a.empty?
result
end
private
attr_reader :scanner, :version, :result
# Parse a version and all its additions recursively.
# It automatically creates a new partition for numbers
# if number_begins_partition is true.
def parse_version(number_begins_partition)
# skip leading v if any
scanner.skip(/v/)
until scanner.eos?
if (s = scanner.scan(/\d+/))
if number_begins_partition
parse_addition(s.to_i)
else
version.tokens << s.to_i
end
elsif (s = scanner.match?(/a\d+/))
# aN is equivalent to alpha-N
scanner.skip('a')
parse_addition(ALPHA)
elsif (s = scanner.match?(/b\d+/))
# bN is equivalent to beta-N
scanner.skip('b')
parse_addition(BETA)
elsif (s = scanner.match?(/m\d+/))
# mN is equivalent to milestone-N
scanner.skip('m')
parse_addition(MILESTONE)
elsif (s = scanner.scan(/(alpha|beta|milestone|rc|cr|sp|ga|final|release|snapshot)[a-z]+/))
# process "alpha" and others as normal lexical tokens if they're followed by a letter
parse_addition(s)
elsif (s = scanner.scan('alpha'))
# handle alphaN, alpha-X, alpha.X, or ending alpha
parse_addition(ALPHA)
elsif (s = scanner.scan('beta'))
parse_addition(BETA)
elsif (s = scanner.scan('milestone'))
parse_addition(MILESTONE)
elsif (s = scanner.scan(/(rc|cr)/))
parse_addition(RC)
elsif (s = scanner.scan('snapshot'))
parse_addition(SNAPSHOT)
elsif (s = scanner.scan(/ga|final|release/))
parse_addition
elsif (s = scanner.scan('sp'))
parse_addition(SP)
# The `+` character is allowed per the official Maven version parser,
# so it's also parsed as an addition.
#
# See for more info https://gitlab.com/gitlab-org/gitlab/-/issues/466158
elsif (s = scanner.scan(/[a-z_+]+/))
parse_addition(s)
elsif (s = scanner.scan('.'))
number_begins_partition = false
elsif (s = scanner.scan('-'))
number_begins_partition = true
else
raise IncompleteScanError, scanner.rest
end
end
end
# Create an addition for the current version, make it the current version, and parse it.
# Numbers start a new partition.
def parse_addition(token = nil)
version.addition = Version.new([token].compact)
@version = version.addition
scanner.skip(/-+/)
parse_version(true)
end
end
end
end
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