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# frozen_string_literal: true
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module SeleniumRake
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  class CrazyFun
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    def initialize
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      @mappings = {}
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      add_mapping('java_binary')
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      add_mapping('java_library')
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      add_mapping('java_test')
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    end
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    def add_mapping(type_name, handler = detonating_handler)
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      @mappings[type_name] = [] unless @mappings.key?(type_name)
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      @mappings[type_name].push handler
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    end
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    def prebuilt_roots
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      @prebuilt_roots ||= []
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    end
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    def find_prebuilt(of)
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      prebuilt_roots.each do |root|
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        root_parts = root.split('/')
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        src = generate_src(of, root_parts)
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        return src if File.exist? src
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      end
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      nil
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    end
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    def create_tasks(files)
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      files.each do |f|
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        puts "Parsing #{f}" if $DEBUG
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        outputs = BuildFile.new.parse_file(f)
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        outputs.each do |type|
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          crash_if_no_mapping_key(type)
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          mappings = @mappings[type.name]
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          mappings.each do |mapping|
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            mapping.handle(self, File.dirname(f), type.args)
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          end
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        end
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      end
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    end
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    private
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    def detonating_handler
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      SeleniumRake::DetonatingHandler.new
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    end
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    def generate_src(of, root_parts)
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      if root_parts.first == of_parts(of).first
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        of_parts(of)[0] = root
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        of_parts(of).join('/')
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      else
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        "#{root}/#{of}"
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      end
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    end
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    def of_parts(of)
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      @of_parts ||=
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        if of =~ %r{build([/\\])}
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          of.split(Regexp.last_match(1))[1..-1]
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        else
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          of.split(Platform.dir_separator)
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        end
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    end
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    def crash_if_no_mapping_key(type)
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      raise "No mapping for type #{type.name}" unless @mappings.key?(type.name)
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    end
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  end
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end
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