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require 'shellwords' require 'optparse' require 'rake/task_manager' require 'rake/file_list' require 'rake/thread_pool' require 'rake/thread_history_display' require 'rake/trace_output' require 'rake/win32' module Rake CommandLineOptionError = Class.new(StandardError) ###################################################################### # Rake main application object. When invoking +rake+ from the # command line, a Rake::Application object is created and run. # class Application include TaskManager include TraceOutput # The name of the application (typically 'rake') attr_reader :name # The original directory where rake was invoked. attr_reader :original_dir # Name of the actual rakefile used. attr_reader :rakefile # Number of columns on the terminal attr_accessor :terminal_columns # List of the top level task names (task names from the command line). attr_reader :top_level_tasks DEFAULT_RAKEFILES = [ 'rakefile', 'Rakefile', 'rakefile.rb', 'Rakefile.rb' ].freeze # Initialize a Rake::Application object. def initialize super @name = 'rake' @rakefiles = DEFAULT_RAKEFILES.dup @rakefile = nil @pending_imports = [] @imported = [] @loaders = {} @default_loader = Rake::DefaultLoader.new @original_dir = Dir.pwd @top_level_tasks = [] add_loader('rb', DefaultLoader.new) add_loader('rf', DefaultLoader.new) add_loader('rake', DefaultLoader.new) @tty_output = STDOUT.tty? @terminal_columns = ENV['RAKE_COLUMNS'].to_i end # Run the Rake application. The run method performs the following # three steps: # # * Initialize the command line options (+init+). # * Define the tasks (+load_rakefile+). # * Run the top level tasks (+top_level+). # # If you wish to build a custom rake command, you should call # +init+ on your application. Then define any tasks. Finally, # call +top_level+ to run your top level tasks. def run standard_exception_handling do init load_rakefile top_level end end # Initialize the command line parameters and app name. def init(app_name='rake') standard_exception_handling do @name = app_name handle_options collect_tasks end end # Find the rakefile and then load it and any pending imports. def load_rakefile standard_exception_handling do raw_load_rakefile end end # Run the top level tasks of a Rake application. def top_level run_with_threads do if options.show_tasks display_tasks_and_comments elsif options.show_prereqs display_prerequisites else top_level_tasks.each { |task_name| invoke_task(task_name) } end end end # Run the given block with the thread startup and shutdown. def run_with_threads thread_pool.gather_history if options.job_stats == :history yield thread_pool.join if options.job_stats stats = thread_pool.statistics puts "Maximum active threads: #{stats[:max_active_threads]}" puts "Total threads in play: #{stats[:total_threads_in_play]}" end ThreadHistoryDisplay.new(thread_pool.history).show if options.job_stats == :history end # Add a loader to handle imported files ending in the extension # +ext+. def add_loader(ext, loader) ext = ".#{ext}" unless ext =~ /^\./ @loaders[ext] = loader end # Application options from the command line def options @options ||= OpenStruct.new end # Return the thread pool used for multithreaded processing. def thread_pool # :nodoc: @thread_pool ||= ThreadPool.new(options.thread_pool_size || FIXNUM_MAX) end # private ---------------------------------------------------------------- def invoke_task(task_string) name, args = parse_task_string(task_string) t = self[name] t.invoke(*args) end def parse_task_string(string) if string =~ /^([^\[]+)(\[(.*)\])$/ name = $1 args = $3.split(/\s*,\s*/) else name = string args = [] end [name, args] end # Provide standard exception handling for the given block. def standard_exception_handling yield rescue SystemExit # Exit silently with current status raise rescue OptionParser::InvalidOption => ex $stderr.puts ex.message exit(false) rescue Exception => ex # Exit with error message display_error_message(ex) exit_because_of_exception(ex) end # Exit the program because of an unhandle exception. # (may be overridden by subclasses) def exit_because_of_exception(ex) exit(false) end # Display the error message that caused the exception. def display_error_message(ex) trace "#{name} aborted!" trace ex.message if options.backtrace trace ex.backtrace.join("\n") else trace Backtrace.collapse(ex.backtrace).join("\n") end trace "Tasks: #{ex.chain}" if has_chain?(ex) trace "(See full trace by running task with --trace)" unless options.backtrace end # Warn about deprecated usage. # # Example: # Rake.application.deprecate("import", "Rake.import", caller.first) # def deprecate(old_usage, new_usage, call_site) unless options.ignore_deprecate $stderr.puts "WARNING: '#{old_usage}' is deprecated. " + "Please use '#{new_usage}' instead.\n" + " at #{call_site}" end end # Does the exception have a task invocation chain? def has_chain?(exception) exception.respond_to?(:chain) && exception.chain end private :has_chain? # True if one of the files in RAKEFILES is in the current directory. # If a match is found, it is copied into @rakefile. def have_rakefile @rakefiles.each do |fn| if File.exist?(fn) others = FileList.glob(fn, File::FNM_CASEFOLD) return others.size == 1 ? others.first : fn elsif fn == '' return fn end end return nil end # True if we are outputting to TTY, false otherwise def tty_output? @tty_output end # Override the detected TTY output state (mostly for testing) def tty_output=(tty_output_state) @tty_output = tty_output_state end # We will truncate output if we are outputting to a TTY or if we've been # given an explicit column width to honor def truncate_output? tty_output? || @terminal_columns.nonzero? end # Display the tasks and comments. def display_tasks_and_comments displayable_tasks = tasks.select { |t| (options.show_all_tasks || t.comment) && t.name =~ options.show_task_pattern } case options.show_tasks when :tasks width = displayable_tasks.map { |t| t.name_with_args.length }.max || 10 if truncate_output? max_column = terminal_width - name.size - width - 7 else max_column = nil end displayable_tasks.each do |t| printf("#{name} %-#{width}s # %s\n", t.name_with_args, max_column ? truncate(t.comment, max_column) : t.comment) end when :describe displayable_tasks.each do |t| puts "#{name} #{t.name_with_args}" comment = t.full_comment || "" comment.split("\n").each do |line| puts " #{line}" end puts end when :lines displayable_tasks.each do |t| t.locations.each do |loc| printf "#{name} %-30s %s\n", t.name_with_args, loc end end else fail "Unknown show task mode: '#{options.show_tasks}'" end end def terminal_width if @terminal_columns.nonzero? result = @terminal_columns else result = unix? ? dynamic_width : 80 end (result < 10) ? 80 : result rescue 80 end # Calculate the dynamic width of the def dynamic_width @dynamic_width ||= (dynamic_width_stty.nonzero? || dynamic_width_tput) end def dynamic_width_stty %x{stty size 2>/dev/null}.split[1].to_i end def dynamic_width_tput %x{tput cols 2>/dev/null}.to_i end def unix? RbConfig::CONFIG['host_os'] =~ /(aix|darwin|linux|(net|free|open)bsd|cygwin|solaris|irix|hpux)/i end def windows? Win32.windows? end def truncate(string, width) if string.nil? "" elsif string.length <= width string else (string[0, width - 3] || "") + "..." end end # Display the tasks and prerequisites def display_prerequisites tasks.each do |t| puts "#{name} #{t.name}" t.prerequisites.each { |pre| puts " #{pre}" } end end def trace(*strings) options.trace_output ||= $stderr trace_on(options.trace_output, *strings) end def sort_options(options) options.sort_by { |opt| opt.select { |o| o =~ /^-/ }.map { |o| o.downcase }.sort.reverse } end private :sort_options # A list of all the standard options used in rake, suitable for # passing to OptionParser. def standard_rake_options sort_options( [ ['--all', '-A', "Show all tasks, even uncommented ones", lambda { |value| options.show_all_tasks = value } ], ['--backtrace=[OUT]', "Enable full backtrace. OUT can be stderr (default) or stdout.", lambda { |value| options.backtrace = true select_trace_output(options, 'backtrace', value) } ], ['--comments', "Show commented tasks only", lambda { |value| options.show_all_tasks = !value } ], ['--describe', '-D [PATTERN]', "Describe the tasks (matching optional PATTERN), then exit.", lambda { |value| select_tasks_to_show(options, :describe, value) } ], ['--dry-run', '-n', "Do a dry run without executing actions.", lambda { |value| Rake.verbose(true) Rake.nowrite(true) options.dryrun = true options.trace = true } ], ['--execute', '-e CODE', "Execute some Ruby code and exit.", lambda { |value| eval(value) exit } ], ['--execute-print', '-p CODE', "Execute some Ruby code, print the result, then exit.", lambda { |value| puts eval(value) exit } ], ['--execute-continue', '-E CODE', "Execute some Ruby code, " + "then continue with normal task processing.", lambda { |value| eval(value) } ], ['--jobs', '-j [NUMBER]', "Specifies the maximum number of tasks to execute in parallel. " + "(default is 2)", lambda { |value| options.thread_pool_size = [(value || 2).to_i, 2].max } ], ['--job-stats [LEVEL]', "Display job statistics. " + "LEVEL=history displays a complete job list", lambda { |value| if value =~ /^history/i options.job_stats = :history else options.job_stats = true end } ], ['--libdir', '-I LIBDIR', "Include LIBDIR in the search path for required modules.", lambda { |value| $:.push(value) } ], ['--multitask', '-m', "Treat all tasks as multitasks.", lambda { |value| options.always_multitask = true } ], ['--no-search', '--nosearch', '-N', "Do not search parent directories for the Rakefile.", lambda { |value| options.nosearch = true } ], ['--prereqs', '-P', "Display the tasks and dependencies, then exit.", lambda { |value| options.show_prereqs = true } ], ['--quiet', '-q', "Do not log messages to standard output.", lambda { |value| Rake.verbose(false) } ], ['--rakefile', '-f [FILE]', "Use FILE as the rakefile.", lambda { |value| value ||= '' @rakefiles.clear @rakefiles << value } ], ['--rakelibdir', '--rakelib', '-R RAKELIBDIR', "Auto-import any .rake files in RAKELIBDIR. " + "(default is 'rakelib')", lambda { |value| options.rakelib = value.split(File::PATH_SEPARATOR) } ], ['--require', '-r MODULE', "Require MODULE before executing rakefile.", lambda { |value| begin require value rescue LoadError => ex begin rake_require value rescue LoadError raise ex end end } ], ['--rules', "Trace the rules resolution.", lambda { |value| options.trace_rules = true } ], ['--silent', '-s', "Like --quiet, but also suppresses the " + "'in directory' announcement.", lambda { |value| Rake.verbose(false) options.silent = true } ], ['--suppress-backtrace PATTERN', "Suppress backtrace lines matching regexp PATTERN. " + "Ignored if --trace is on.", lambda { |value| options.suppress_backtrace_pattern = Regexp.new(value) } ], ['--system', '-g', "Using system wide (global) rakefiles " + "(usually '~/.rake/*.rake').", lambda { |value| options.load_system = true } ], ['--no-system', '--nosystem', '-G', "Use standard project Rakefile search paths, " + "ignore system wide rakefiles.", lambda { |value| options.ignore_system = true } ], ['--tasks', '-T [PATTERN]', "Display the tasks (matching optional PATTERN) " + "with descriptions, then exit.", lambda { |value| select_tasks_to_show(options, :tasks, value) } ], ['--trace=[OUT]', '-t', "Turn on invoke/execute tracing, enable full backtrace. " + "OUT can be stderr (default) or stdout.", lambda { |value| options.trace = true options.backtrace = true select_trace_output(options, 'trace', value) Rake.verbose(true) } ], ['--verbose', '-v', "Log message to standard output.", lambda { |value| Rake.verbose(true) } ], ['--version', '-V', "Display the program version.", lambda { |value| puts "rake, version #{RAKEVERSION}" exit } ], ['--where', '-W [PATTERN]', "Describe the tasks (matching optional PATTERN), then exit.", lambda { |value| select_tasks_to_show(options, :lines, value) options.show_all_tasks = true } ], ['--no-deprecation-warnings', '-X', "Disable the deprecation warnings.", lambda { |value| options.ignore_deprecate = true } ], ]) end def select_tasks_to_show(options, show_tasks, value) options.show_tasks = show_tasks options.show_task_pattern = Regexp.new(value || '') Rake::TaskManager.record_task_metadata = true end private :select_tasks_to_show def select_trace_output(options, trace_option, value) value = value.strip unless value.nil? case value when 'stdout' options.trace_output = $stdout when 'stderr', nil options.trace_output = $stderr else fail CommandLineOptionError, "Unrecognized --#{trace_option} option '#{value}'" end end private :select_trace_output # Read and handle the command line options. def handle_options options.rakelib = ['rakelib'] options.trace_output = $stderr OptionParser.new do |opts| opts.banner = "#{Rake.application.name} [-f rakefile] {options} targets..." opts.separator "" opts.separator "Options are ..." opts.on_tail("-h", "--help", "-H", "Display this help message.") do puts opts exit end standard_rake_options.each { |args| opts.on(*args) } opts.environment('RAKEOPT') end.parse! end # Similar to the regular Ruby +require+ command, but will check # for *.rake files in addition to *.rb files. def rake_require(file_name, paths=$LOAD_PATH, loaded=$") fn = file_name + ".rake" return false if loaded.include?(fn) paths.each do |path| full_path = File.join(path, fn) if File.exist?(full_path) Rake.load_rakefile(full_path) loaded << fn return true end end fail LoadError, "Can't find #{file_name}" end def find_rakefile_location here = Dir.pwd until (fn = have_rakefile) Dir.chdir("..") return nil if Dir.pwd == here || options.nosearch here = Dir.pwd end [fn, here] ensure Dir.chdir(Rake.original_dir) end def print_rakefile_directory(location) $stderr.puts "(in #{Dir.pwd})" unless options.silent or original_dir == location end def raw_load_rakefile # :nodoc: rakefile, location = find_rakefile_location if (! options.ignore_system) && (options.load_system || rakefile.nil?) && system_dir && File.directory?(system_dir) print_rakefile_directory(location) glob("#{system_dir}/*.rake") do |name| add_import name end else fail "No Rakefile found (looking for: #{@rakefiles.join(', ')})" if rakefile.nil? @rakefile = rakefile Dir.chdir(location) print_rakefile_directory(location) Rake.load_rakefile(File.expand_path(@rakefile)) if @rakefile && @rakefile != '' options.rakelib.each do |rlib| glob("#{rlib}/*.rake") do |name| add_import name end end end load_imports end def glob(path, &block) FileList.glob(path.gsub("\\", '/')).each(&block) end private :glob # The directory path containing the system wide rakefiles. def system_dir @system_dir ||= begin if ENV['RAKE_SYSTEM'] ENV['RAKE_SYSTEM'] else standard_system_dir end end end # The standard directory containing system wide rake files. if Win32.windows? def standard_system_dir #:nodoc: Win32.win32_system_dir end else def standard_system_dir #:nodoc: File.join(File.expand_path('~'), '.rake') end end private :standard_system_dir # Collect the list of tasks on the command line. If no tasks are # given, return a list containing only the default task. # Environmental assignments are processed at this time as well. def collect_tasks @top_level_tasks = [] ARGV.each do |arg| if arg =~ /^(\w+)=(.*)$/m ENV[$1] = $2 else @top_level_tasks << arg unless arg =~ /^-/ end end @top_level_tasks.push(default_task_name) if @top_level_tasks.empty? end # Default task name ("default"). # (May be overridden by subclasses) def default_task_name "default" end # Add a file to the list of files to be imported. def add_import(fn) @pending_imports << fn end # Load the pending list of imported files. def load_imports while fn = @pending_imports.shift next if @imported.member?(fn) fn_task = lookup(fn) and fn_task.invoke ext = File.extname(fn) loader = @loaders[ext] || @default_loader loader.load(fn) @imported << fn end end def rakefile_location(backtrace=caller) backtrace.map { |t| t[/([^:]+):/, 1] } re = /^#{@rakefile}$/ re = /#{re.source}/i if windows? backtrace.find { |str| str =~ re } || '' end private FIXNUM_MAX = (2**(0.size * 8 - 2) - 1) # :nodoc: end end