module Rake::TaskManager

The TaskManager module is a mixin for managing tasks.

Attributes

last_description[RW]

Track the last comment made in the Rakefile.

Public Instance Methods

[](task_name, scopes=nil) click to toggle source

Find a matching task for task_name.

# File rake-13.0.1/lib/rake/task_manager.rb, line 54
def [](task_name, scopes=nil)
  task_name = task_name.to_s
  self.lookup(task_name, scopes) or
    enhance_with_matching_rule(task_name) or
    synthesize_file_task(task_name) or
    fail generate_message_for_undefined_task(task_name)
end
clear() click to toggle source

Clear all tasks in this application.

# File rake-13.0.1/lib/rake/task_manager.rb, line 182
def clear
  @tasks.clear
  @rules.clear
end
current_scope() click to toggle source

Return the list of scope names currently active in the task manager.

# File rake-13.0.1/lib/rake/task_manager.rb, line 222
def current_scope
  @scope
end
enhance_with_matching_rule(task_name, level=0) click to toggle source

If a rule can be found that matches the task name, enhance the task with the prerequisites and actions from the rule. Set the source attribute of the task appropriately for the rule. Return the enhanced task or nil of no rule was found.

# File rake-13.0.1/lib/rake/task_manager.rb, line 151
def enhance_with_matching_rule(task_name, level=0)
  fail Rake::RuleRecursionOverflowError,
    "Rule Recursion Too Deep" if level >= 16
  @rules.each do |pattern, args, extensions, order_only, block|
    if pattern && pattern.match(task_name)
      task = attempt_rule(task_name, pattern, args, extensions, block, level)
      task | order_only unless order_only.nil?
      return task if task
    end
  end
  nil
rescue Rake::RuleRecursionOverflowError => ex
  ex.add_target(task_name)
  fail ex
end
generate_did_you_mean_suggestions(task_name) click to toggle source
# File rake-13.0.1/lib/rake/task_manager.rb, line 68
def generate_did_you_mean_suggestions(task_name)
  return "" unless defined?(::DidYouMean::SpellChecker)

  suggestions = ::DidYouMean::SpellChecker.new(dictionary: @tasks.keys).correct(task_name.to_s)
  if ::DidYouMean.respond_to?(:formatter)# did_you_mean v1.2.0 or later
    ::DidYouMean.formatter.message_for(suggestions)
  elsif defined?(::DidYouMean::Formatter) # before did_you_mean v1.2.0
    ::DidYouMean::Formatter.new(suggestions).to_s
  else
    ""
  end
end
generate_message_for_undefined_task(task_name) click to toggle source
# File rake-13.0.1/lib/rake/task_manager.rb, line 62
def generate_message_for_undefined_task(task_name)
  message = "Don't know how to build task '#{task_name}' "\
            "(See the list of available tasks with `#{Rake.application.name} --tasks`)"
  message + generate_did_you_mean_suggestions(task_name)
end
in_namespace(name) { |ns| ... } click to toggle source

Evaluate the block in a nested namespace named name. Create an anonymous namespace if name is nil.

# File rake-13.0.1/lib/rake/task_manager.rb, line 228
def in_namespace(name)
  name ||= generate_name
  @scope = Scope.new(name, @scope)
  ns = NameSpace.new(self, @scope)
  yield(ns)
  ns
ensure
  @scope = @scope.tail
end
intern(task_class, task_name) click to toggle source

Lookup a task. Return an existing task if found, otherwise create a task of the current type.

# File rake-13.0.1/lib/rake/task_manager.rb, line 49
def intern(task_class, task_name)
  @tasks[task_name.to_s] ||= task_class.new(task_name, self)
end
lookup(task_name, initial_scope=nil) click to toggle source

Lookup a task, using scope and the scope hints in the task name. This method performs straight lookups without trying to synthesize file tasks or rules. Special scope names (e.g. ‘^’) are recognized. If no scope argument is supplied, use the current scope. Return nil if the task cannot be found.

# File rake-13.0.1/lib/rake/task_manager.rb, line 192
def lookup(task_name, initial_scope=nil)
  initial_scope ||= @scope
  task_name = task_name.to_s
  if task_name =~ /^rake:/
    scopes = Scope.make
    task_name = task_name.sub(/^rake:/, "")
  elsif task_name =~ /^(\^+)/
    scopes = initial_scope.trim($1.size)
    task_name = task_name.sub(/^(\^+)/, "")
  else
    scopes = initial_scope
  end
  lookup_in_scope(task_name, scopes)
end
resolve_args(args) click to toggle source

Resolve the arguments for a task/rule. Returns a tuple of [task_name, arg_name_list, prerequisites, order_only_prerequisites].

# File rake-13.0.1/lib/rake/task_manager.rb, line 88
def resolve_args(args)
  if args.last.is_a?(Hash)
    deps = args.pop
    resolve_args_with_dependencies(args, deps)
  else
    resolve_args_without_dependencies(args)
  end
end
tasks() click to toggle source

List of all defined tasks in this application.

# File rake-13.0.1/lib/rake/task_manager.rb, line 168
def tasks
  @tasks.values.sort_by { |t| t.name }
end
tasks_in_scope(scope) click to toggle source

List of all the tasks defined in the given scope (and its sub-scopes).

# File rake-13.0.1/lib/rake/task_manager.rb, line 174
def tasks_in_scope(scope)
  prefix = scope.path
  tasks.select { |t|
    /^#{prefix}:/ =~ t.name
  }
end

Private Instance Methods

add_location(task) click to toggle source

Add a location to the locations field of the given task.

# File rake-13.0.1/lib/rake/task_manager.rb, line 241
def add_location(task)
  loc = find_location
  task.locations << loc if loc
  task
end
attempt_rule(task_name, task_pattern, args, extensions, block, level) click to toggle source

Attempt to create a rule given the list of prerequisites.

# File rake-13.0.1/lib/rake/task_manager.rb, line 271
def attempt_rule(task_name, task_pattern, args, extensions, block, level)
  sources = make_sources(task_name, task_pattern, extensions)
  prereqs = sources.map { |source|
    trace_rule level, "Attempting Rule #{task_name} => #{source}"
    if File.exist?(source) || Rake::Task.task_defined?(source)
      trace_rule level, "(#{task_name} => #{source} ... EXIST)"
      source
    elsif parent = enhance_with_matching_rule(source, level + 1)
      trace_rule level, "(#{task_name} => #{source} ... ENHANCE)"
      parent.name
    else
      trace_rule level, "(#{task_name} => #{source} ... FAIL)"
      return nil
    end
  }
  task = FileTask.define_task(task_name, { args => prereqs }, &block)
  task.sources = prereqs
  task
end
find_location() click to toggle source

Find the location that called into the dsl layer.

# File rake-13.0.1/lib/rake/task_manager.rb, line 248
def find_location
  locations = caller
  i = 0
  while locations[i]
    return locations[i + 1] if locations[i] =~ /rake\/dsl_definition.rb/
    i += 1
  end
  nil
end
generate_name() click to toggle source

Generate an anonymous namespace name.

# File rake-13.0.1/lib/rake/task_manager.rb, line 259
def generate_name
  @seed ||= 0
  @seed += 1
  "_anon_#{@seed}"
end
get_description(task) click to toggle source

Return the current description, clearing it in the process.

# File rake-13.0.1/lib/rake/task_manager.rb, line 319
def get_description(task)
  desc = @last_description
  @last_description = nil
  desc
end
lookup_in_scope(name, scope) click to toggle source

Lookup the task name

# File rake-13.0.1/lib/rake/task_manager.rb, line 208
def lookup_in_scope(name, scope)
  loop do
    tn = scope.path_with_task_name(name)
    task = @tasks[tn]
    return task if task
    break if scope.empty?
    scope = scope.tail
  end
  nil
end
make_sources(task_name, task_pattern, extensions) click to toggle source

Make a list of sources from the list of file name extensions / translation procs.

# File rake-13.0.1/lib/rake/task_manager.rb, line 293
def make_sources(task_name, task_pattern, extensions)
  result = extensions.map { |ext|
    case ext
    when /%/
      task_name.pathmap(ext)
    when %r{/}
      ext
    when /^\./
      source = task_name.sub(task_pattern, ext)
      source == ext ? task_name.ext(ext) : source
    when String
      ext
    when Proc, Method
      if ext.arity == 1
        ext.call(task_name)
      else
        ext.call
      end
    else
      fail "Don't know how to handle rule dependent: #{ext.inspect}"
    end
  }
  result.flatten
end
resolve_args_without_dependencies(args) click to toggle source

Resolve task arguments for a task or rule when there are no dependencies declared.

The patterns recognized by this argument resolving function are:

task :t
task :t, [:a]
# File rake-13.0.1/lib/rake/task_manager.rb, line 105
def resolve_args_without_dependencies(args)
  task_name = args.shift
  if args.size == 1 && args.first.respond_to?(:to_ary)
    arg_names = args.first.to_ary
  else
    arg_names = args
  end
  [task_name, arg_names, [], nil]
end