human_version_to_cfbundle_version.rb from redshed at Krugle

Show human_version_to_cfbundle_version.rb syntax highlighted

#! /usr/bin/ruby
# 
# human_version_to_cfbundle_version.rb 1.0d1 (or 01000.00.01 ;-)
#   Based on <http://www.dribin.org/dave/blog/archives/2006/08/02/versioning_os_x_apps/>
#   Copyright (c) 2006 Jonathan 'Wolf' Rentzsch.
#   Some rights reserved: <http://creativecommons.org/licenses/by/2.0/>
#
# A tool that generates CFVersionNumber+Launch Services-happy version numbers given a human version number.
# For example, 1.2.3b4 => becomes 01020.32.04.
# All information is encoded -- no information is lost. It's thus reversible, which this tool also does.

class VersionNumber
  DEVELOPMENT = 'd'
  ALPHA = 'a'
  BETA = 'b'
  FINAL_CANDIDATE = 'fc'
  FINAL = ''
  CFBUNDLEVERSION_MAP = {DEVELOPMENT=>0,ALPHA=>1,BETA=>2,FINAL_CANDIDATE=>3,FINAL=>9}
  def initialize(version_string)
    # First try to match CFBundleVersion's format ('01031.08.04').
    m = version_string.strip.match(/^(\d\d)(\d\d)(\d\.\d)([01239])\.(\d\d)$/)
    if m.nil?
      # Nope, try human-style ('1.3.10b4').
      # Man, where's RCR 237 (Named capture) when I need it?
      m = version_string.gsub(/\s/,'').match(/^(\d{1,2})(\.(\d{1,2}))?(\.(\d{1,2}))?((d|a|b|fc)(\d{1,2}))?$/)
      raise ArgumentError, "can't parse '#{version_string}'" if m.nil?
      @major = $1.to_i
      @minor = $3.to_i
      @bug = $5.to_i
      if $7.nil?
        @stage = FINAL
        @stageNum = 0
      else
        @stage = $7 # Kept as a string.
        @stageNum = $8.to_i
      end
      @original_version_string_was_human = true
    else
      @major = $1.to_i
      @minor = $2.to_i
      @bug = $3.delete('.').to_i
      @stage = CFBUNDLEVERSION_MAP.invert[$4.to_i]
      @stageNum = $5.to_i
      @original_version_string_was_human = false
    end
  end
  def human_version
    result = "#{@major}.#{@minor}"
    result += ".#{@bug}" if @bug != 0
    result += "#{@stage}"+"#{@stageNum}" if @stage != FINAL
    result
  end
  alias to_s human_version
  def cfbundle_version
    result = sprintf('%02d%02d%02d%s.%02d',
      @major.to_i,
      @minor.to_i,
      @bug.to_i,
      CFBUNDLEVERSION_MAP[@stage],
      @stageNum.to_i)
    result.insert(5,'.') # Weird placement for the first decimal: it lands in the middle of the 2-digit bug number.
  end
  def other_version
    @original_version_string_was_human ? cfbundle_version : human_version
  end
end

if ARGV[0]
  puts VersionNumber.new(ARGV[0]).other_version
else
  puts 'usage: ruby human_version_to_cfbundle_version.rb 1.3.10b4'
end
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