Method: Jarbler::Config#define_jruby_version

Defined in:
lib/jarbler/config.rb

#define_jruby_version ⇒ Object

define JRuby version if not set in config file



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# File 'lib/jarbler/config.rb', line 152

def define_jruby_version
  if @jruby_version.nil? && File.exist?('.ruby-version')                    # not yet defined in config file but .ruby-version file exists
    # read the file RAILS_ROOT/.ruby-version starting from char at position 6 to the end of the line
    full_jruby_version_string = File.read('.ruby-version')
    if full_jruby_version_string[0..5] == 'jruby-'
      @jruby_version = full_jruby_version_string[6..20].strip
      if @jruby_version =~ /\d+\.\d+\.\d+\.\d+/                        # check if the version is valid with four digits
        debug "Jarbler::Config.define_jruby_version: JRuby version used from .ruby-version file: #{@jruby_version}"
      else
        debug "Jarbler::Config.define_jruby_version: Invalid JRuby version in .ruby-version file (not four digits delimited by dot): #{full_jruby_version_string}"
        @jruby_version = nil
      end
    else
      debug "Jarbler::Config.define_jruby_version: Version info from .ruby-version file not applicable: #{full_jruby_version_string}"
    end
  end

  if @jruby_version.nil?                                                    # not yet defined in config file and .ruby-version file
    # no .ruby-version file to be used, use JRuby version of the latest Gem
    # Fetch the gem specification from Rubygems.org
    # search for the gem and get the JSON response
    response = Gem::SpecFetcher.fetcher.search_for_dependency(Gem::Dependency.new('jruby-jars'))
    debug("Jarbler::Config.define_jruby_version: Response from search_for_dependency = #{response.inspect}")
    # extract the versions from the response
    @jruby_version = response&.first&.first&.first&.version&.to_s
    raise "Unable to determine the latest available version of jruby-jars gem!\nResponse = #{response.inspect}" unless @jruby_version

    debug "Jarbler::Config.define_jruby_version: JRuby version from latest jruby-jars gem: #{jruby_version}"
  end
end