cafe-grader-judge-scripts Commit

cafe-grader-judge-scripts

Commit `r103:933325ce824a` public

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Description:

locks dir based on temp file, does not copy dir when copying scripts, added proper rescue for ln_s

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[Not Reviewed]

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r103:933325ce824a - Sun, 25 Apr 2010 02:11:41 - 4 files changed: 4 inserted, 3 deleted

lib/dir_init.rb ¶ +1 -1

               require 'ftools'
               # DirInit::Manager handles directory initialization and clean-up when
               # there are many concurrent processes that wants to modify the
               # directory in the same way.
               #
               # An example usage is when each process wants to copy some temporary
               # files to the directory and delete these files after finishing its
               # job.  Problems may occur when the first process delete the files
               # while the second process is still using the files.
               #
               # This library maintain a reference counter on the processes using the
               # directory.  It locks the dir to manage critical section when
               # updating the reference counter.
               module DirInit
                 class Manager
                   def initialize(dir_name, usage_filename='.usage_counter')
                     @dir_name = dir_name
                     @usage_filename = usage_filename
                   end
                   # Check if someone has initialized the dir.  If not, call block.
                   def setup    # :yields: block
-            -       dir = File.new(@dir_name)
+            +       dir = File.new(@dir_name + '/lockfile',"w+")
                     dir.flock(File::LOCK_EX)
                     begin
                       counter_filename = get_counter_filename
                       if File.exist? counter_filename
                         # someone is here
                         f = File.new(counter_filename,"r+")
                         counter = f.read.to_i
                         f.seek(0)
                         f.write("#{counter+1}\n")
                         f.close
                       else
                         # i'm the first, create the counter file
                         counter = 0
                         f = File.new(counter_filename,"w")
                         f.write("1\n")
                         f.close
                       end
                       # if no one is here
                       if counter == 0
                         if block_given?
                           yield
                         end
                       end
                     rescue
                       raise
                     ensure
                       # make sure it unlock the directory
                       dir.flock(File::LOCK_UN)
                       dir.close
                     end
                   end
                   # Check if I am the last one using the dir.  If true, call block.
                   def teardown
                     dir = File.new(@dir_name)
                     dir.flock(File::LOCK_EX)
                     begin
                       counter_filename = get_counter_filename
                       if File.exist? counter_filename
                         # someone is here
                         f = File.new(counter_filename,"r+")
                         counter = f.read.to_i
                         f.seek(0)
                         f.write("#{counter-1}\n")
                         f.close
                         if counter == 1
                           # i'm the last one
                           File.delete(counter_filename)
                           if block_given?
                             yield
                           end
                         end
                       else
                         # This is BAD
                         raise "Error: reference count missing"
                       end
                     rescue
                       raise
                     ensure
                       # make sure it unlock the directory
                       dir.flock(File::LOCK_UN)
                       dir.close
                     end
                   end
                   protected
                   def get_counter_filename
                     return File.join(@dir_name,@usage_filename)
                   end
                 end
               end

lib/engine.rb ¶ +1

               require 'fileutils'
               require File.join(File.dirname(__FILE__),'dir_init')
               module Grader
                 #
                 # A grader engine grades a submission, against anything: a test
                 # data, or a user submitted test data.  It uses two helpers objects:
                 # room_maker and reporter.
                 #
                 class Engine
                   attr_writer :room_maker
                   attr_writer :reporter
                   def initialize(options={})
                     # default options
                     if not options.include? :room_maker
                       options[:room_maker] = Grader::SubmissionRoomMaker.new
                     end
                     if not options.include? :reporter
                       options[:reporter] =  Grader::SubmissionReporter.new
                     end
                     @config = Grader::Configuration.get_instance
                     @room_maker = options[:room_maker]
                     @reporter = options[:reporter]
                   end
                   # takes a submission, asks room_maker to produce grading directories,
                   # calls grader scripts, and asks reporter to save the result
                   def grade(submission)
                     current_dir = FileUtils.pwd
                     user = submission.user
                     problem = submission.problem
                     # TODO: will have to create real exception for this
                     if user==nil or problem == nil
                       @reporter.report_error(submission,"Grading error: problem with submission")
                       #raise "engine: user or problem is nil"
                     end
                     # TODO: this is another hack so that output only task can be judged
                     if submission.language!=nil
                       language = submission.language.name
                       lang_ext = submission.language.ext
                     else
                       language = 'c'
                       lang_ext = 'c'
                     end
                     # FIX THIS
                     talk 'some hack on language'
                     if language == 'cpp'
                       language = 'c++'
                     end
                     # COMMENT: should it be only source.ext?
                     if problem!=nil
                       source_name = "#{problem.name}.#{lang_ext}"
                     else
                       source_name = "source.#{lang_ext}"
                     end
                     begin
                       grading_dir = @room_maker.produce_grading_room(submission)
                       @room_maker.save_source(submission,source_name)
                       problem_home = @room_maker.find_problem_home(submission)
                       # puts "GRADING DIR: #{grading_dir}"
                       # puts "PROBLEM DIR: #{problem_home}"
                       if !FileTest.exist?(problem_home)
                         raise "No test data."
                       end
                       dinit = DirInit::Manager.new(problem_home)
                       dinit.setup do
                         copy_log = copy_script(problem_home)
                         save_copy_log(problem_home,copy_log)
                       end
                       call_judge(problem_home,language,grading_dir,source_name)
                       @reporter.report(submission,"#{grading_dir}/test-result")
                       dinit.teardown do
                         copy_log = load_copy_log(problem_home)
                         clear_copy_log(problem_home)
                         clear_script(copy_log,problem_home)
                       end
                     rescue RuntimeError => msg
                       @reporter.report_error(submission, msg)
                     ensure
                       @room_maker.clean_up(submission)
                       Dir.chdir(current_dir)   # this is really important
                     end
                   end
                   protected
                   def talk(str)
                     if @config.talkative
                       puts str
                     end
                   end
                   def call_judge(problem_home,language,grading_dir,fname)
                     ENV['PROBLEM_HOME'] = problem_home
                     talk grading_dir
                     Dir.chdir grading_dir
                     cmd = "#{problem_home}/script/judge #{language} #{fname}"
                     talk "CMD: #{cmd}"
                     system(cmd)
                   end
                   def get_std_script_dir
                     GRADER_ROOT + '/std-script'
                   end
                   def copy_script(problem_home)
                     script_dir = "#{problem_home}/script"
                     std_script_dir = get_std_script_dir
                     raise "std-script directory not found" if !FileTest.exist?(std_script_dir)
                     scripts = Dir[std_script_dir + '/*']
                     copied = []
                     scripts.each do |s|
                       fname = File.basename(s)
+            +         next if FileTest.directory?(s)
                       if !FileTest.exist?("#{script_dir}/#{fname}")
                         copied << fname
                         FileUtils.cp(s, "#{script_dir}")
                       end
                     end
                     return copied
                   end
                   def copy_log_filename(problem_home)
                     return File.join(problem_home, '.scripts_copied')
                   end
                   def save_copy_log(problem_home, log)
                     f = File.new(copy_log_filename(problem_home),"w")
                     log.each do |fname|
                       f.write("#{fname}\n")
                     end
                     f.close
                   end
                   def load_copy_log(problem_home)
                     f = File.new(copy_log_filename(problem_home),"r")
                     log = []
                     f.readlines.each do |line|
                       log << line.strip
                     end
                     f.close
                     log
                   end
                   def clear_copy_log(problem_home)
                     File.delete(copy_log_filename(problem_home))
                   end
                   def clear_script(log,problem_home)
                     log.each do |s|
                       FileUtils.rm("#{problem_home}/script/#{s}")
                     end
                   end
                   def mkdir_if_does_not_exist(dirname)
                     Dir.mkdir(dirname) if !FileTest.exist?(dirname)
                   end
                 end
               end

lib/test_request_helper.rb ¶ +1 -1

               #
               # This part contains various test_request helpers for interfacing
               # with Grader::Engine.  There are TestRequestRoomMaker and
               # TestRequestReporter.
               module Grader
                 def self.link_or_copy(src, des)
                   begin
                     FileUtils.ln_s(src, des)
-            -     rescue
+            +     rescue NotImplementedError
                     FileUtils.cp(src,des)
                   end
                 end
                 def self.call_and_log(error_message)
                   begin
                     yield
                   rescue
                     msg = "ERROR: #{error_message}"
                     raise msg
                   end
                 end
                 #
                 # A TestRequestRoomMaker is a helper object for Engine
                 # - finds grading room: in user_result_dir/(user)/test_request/ ...
                 # - prepare problem configuration for grading --- basically it copy
                 #   all config files, and copy user's input into the testcase
                 #   directory.  First, it finds the template from problem template
                 #   directory; if it can't find a template, it'll use the template
                 #   from default template.
                 class TestRequestRoomMaker
                   def initialize
                     @config = Grader::Configuration.get_instance
                   end
                   def produce_grading_room(test_request)
                     grading_room = grading_room_dir(test_request)
                     FileUtils.mkdir_p(grading_room)
                     #
                     # Also copy additional submitted file to this directory as well.
                     # The program would see this file only if it is copied
                     #    to the sandbox directory later.  The run script should do it.
                     #
                     if FileTest.exists?("#{test_request.input_file_name}.files")
                       FileUtils.cp_r("#{test_request.input_file_name}.files/.",
                                      "#{grading_room}")
                     end
                     grading_room
                   end
                   def find_problem_home(test_request)
                     problem_name = test_request.problem_name
                     template_dir = "#{@config.test_request_problem_templates_dir}/" + problem_name
                     raise "Test Request: error template not found" if !File.exists?(template_dir)
                     problem_home = problem_home_dir(test_request)
                     FileUtils.mkdir_p(problem_home)
                     copy_problem_template(template_dir,problem_home)
                     link_input_file(test_request,problem_home)
                     problem_home
                   end
                   def save_source(test_request,source_name)
                     dir = self.produce_grading_room(test_request)
                     submission = test_request.submission
                     f = File.open("#{dir}/#{source_name}","w")
                     f.write(submission.source)
                     f.close
                   end
                   def clean_up(test_request)
                     problem_home = problem_home_dir(test_request)
                     remove_data_files(problem_home)
                   end
                   protected
                   def grading_room_dir(test_request)
                     problem_name = test_request.problem_name
                     user = test_request.user
                     grading_room = "#{@config.user_result_dir}" +
                       "/#{user.login}/test_request" +
                       "/#{problem_name}/#{test_request.id}"
                     grading_room
                   end
                   def problem_home_dir(test_request)
                     problem_name = test_request.problem_name
                     user = test_request.user
                     "#{@config.user_result_dir}" +
                       "/#{user.login}/test_request/#{problem_name}"
                   end
                   def copy_problem_template(template_dir,problem_home)
                     Grader::call_and_log("Test Request: cannot copy problem template") {
                       FileUtils.cp_r("#{template_dir}/.","#{problem_home}")
                     }
                   end
                   def link_input_file(test_request, problem_home)
                     input_fname = "#{test_request.input_file_name}"
                     if !File.exists?(input_fname)
                       raise "Test Request: input file not found."
                     end
                     input_fname_problem_home = "#{problem_home}/test_cases/1/input-1.txt"
                     if File.exists?(input_fname_problem_home)
                       FileUtils.rm([input_fname_problem_home], :force => true)
                     end
                     Grader::link_or_copy("#{input_fname}", "#{input_fname_problem_home}")
                   end
                   def remove_data_files(problem_home)
                     if File.exists?("#{problem_home}/test_cases/1/input-1.txt")
                       Grader::call_and_log("Test Request: cannot remove data files") {
                         FileUtils.rm Dir.glob("#{problem_home}/test_cases/1/*")
                       }
                     end
                   end
                 end
                 class TestRequestReporter
                   def initialize
                     @config = Grader::Configuration.get_instance
                   end
                   def report(test_request,test_result_dir)
                     save_result(test_request,read_result(test_result_dir))
                   end
                   def report_error(test_request, msg)
                     save_result(test_request, {:running_stat => {
                                     :msg => "#{msg}",
                                     :running_time => nil,
                                     :exit_status => "Some error occured. Program did not run",
                                     :memory_usage => nil
                                   }})
                   end
                   protected
                   def read_result(test_result_dir)
                     # TODO:
                     cmp_msg_fname = "#{test_result_dir}/compiler_message"
                     cmp_file = File.open(cmp_msg_fname)
                     cmp_msg = cmp_file.read
                     cmp_file.close
                     result_file_name = "#{test_result_dir}/1/result"
                     if File.exists?(result_file_name)
                       output_file_name = "#{test_result_dir}/1/output.txt"
                       results = File.open("#{test_result_dir}/1/result").readlines
                       stat = extract_running_stat(results)
                       return {
                         :output_file_name => output_file_name,
                         :running_stat => stat,
                         :comment => "",
                         :cmp_msg => cmp_msg}
                     else
                       return {
                         :running_stat => nil,
                         :comment => "Compilation error",
                         :cmp_msg => cmp_msg}
                     end
                   end
                   def extract_running_stat(results)
                     running_stat_line = results[-1]
                     # extract exit status line
                     run_stat = ""
                     if !(/[Cc]orrect/.match(results[0]))
                       run_stat = results[0].chomp
                     else
                       run_stat = 'Program exited normally'
                     end
                     # extract running time
                     if res = /r(.*)u(.*)s/.match(running_stat_line)
                       seconds = (res[1].to_f + res[2].to_f)
                       time_stat = "Time used: #{seconds} sec."
                     else
                       seconds = nil
                       time_stat = "Time used: n/a sec."
                     end
                     # extract memory usage
                     if res = /s(.*)m/.match(running_stat_line)
                       memory_used = res[1].to_i
                     else
                       memory_used = -1
                     end

std-script/.gitignore ¶ +1 -1

@@ -1,2 +1,2
1	box	1	box
2	-	2	+ box.exe

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r103:933325ce824a - Sun, 25 Apr 2010 02:11:41 - 4 files changed: 4 inserted, 3 deleted

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r103:933325ce824a - Sun, 25 Apr 2010 02:11:41 - 4 files changed: 4 inserted, 3 deleted

Commit `r103:933325ce824a` public