Module: Rake::TaskManager

Included in:
Application
Defined in:
lib/rake/task_manager.rb

Overview

The TaskManager module is a mixin for managing tasks.

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#last_description ⇒ Object Also known as: last_comment

Track the last comment made in the Rakefile.



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# File 'lib/rake/task_manager.rb', line 6

def last_description
  @last_description
end

Instance Method Details

#[](task_name, scopes = nil) ⇒ Object

Find a matching task for task_name.



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# File 'lib/rake/task_manager.rb', line 42

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 "Don't know how to build task '#{task_name}'"
end

#clear ⇒ Object

Clear all tasks in this application.



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# File 'lib/rake/task_manager.rb', line 151

def clear
  @tasks.clear
  @rules.clear
end

#create_rule(*args, &block) ⇒ Object 



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# File 'lib/rake/task_manager.rb', line 17

def create_rule(*args, &block)
  pattern, arg_names, deps = resolve_args(args)
  pattern = Regexp.new(Regexp.quote(pattern) + '$') if String === pattern
  @rules << [pattern, deps, block]
end

#current_scope ⇒ Object

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



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# File 'lib/rake/task_manager.rb', line 191

def current_scope
  @scope.dup
end

#define_task(task_class, *args, &block) ⇒ Object 



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# File 'lib/rake/task_manager.rb', line 23

def define_task(task_class, *args, &block)
  task_name, arg_names, deps = resolve_args(args)
  task_name = task_class.scope_name(@scope, task_name)
  deps = [deps] unless deps.respond_to?(:to_ary)
  deps = deps.collect {|d| d.to_s }
  task = intern(task_class, task_name)
  task.set_arg_names(arg_names) unless arg_names.empty?
  task.add_description(get_description)
  task.enhance(deps, &block)
  task
end

#enhance_with_matching_rule(task_name, level = 0) ⇒ Object

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.



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# File 'lib/rake/task_manager.rb', line 121

def enhance_with_matching_rule(task_name, level=0)
  fail Rake::RuleRecursionOverflowError,
    "Rule Recursion Too Deep" if level >= 16
  @rules.each do |pattern, extensions, block|
    if md = pattern.match(task_name)
      task = attempt_rule(task_name, extensions, block, level)
      return task if task
    end
  end
  nil
rescue Rake::RuleRecursionOverflowError => ex
  ex.add_target(task_name)
  fail ex
end

#in_namespace(name) ⇒ Object

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



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# File 'lib/rake/task_manager.rb', line 197

def in_namespace(name)
  name ||= generate_name
  @scope.push(name)
  ns = NameSpace.new(self, @scope)
  yield(ns)
  ns
ensure
  @scope.pop
end

#initialize ⇒ Object 



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# File 'lib/rake/task_manager.rb', line 9

def initialize
  super
  @tasks = Hash.new
  @rules = Array.new
  @scope = Array.new
  @last_description = nil
end

#intern(task_class, task_name) ⇒ Object

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



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# File 'lib/rake/task_manager.rb', line 37

def intern(task_class, task_name)
  @tasks[task_name.to_s] ||= task_class.new(task_name, self)
end

#lookup(task_name, initial_scope = nil) ⇒ Object

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.



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# File 'lib/rake/task_manager.rb', line 161

def lookup(task_name, initial_scope=nil)
  initial_scope ||= @scope
  task_name = task_name.to_s
  if task_name =~ /^rake:/
    scopes = []
    task_name = task_name.sub(/^rake:/, '')
  elsif task_name =~ /^(\^+)/
    scopes = initial_scope[0, initial_scope.size - $1.size]
    task_name = task_name.sub(/^(\^+)/, '')
  else
    scopes = initial_scope
  end
  lookup_in_scope(task_name, scopes)
end

#resolve_args(args) ⇒ Object

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



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# File 'lib/rake/task_manager.rb', line 57

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

#synthesize_file_task(task_name) ⇒ Object 



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# File 'lib/rake/task_manager.rb', line 50

def synthesize_file_task(task_name)
  return nil unless File.exist?(task_name)
  define_task(Rake::FileTask, task_name)
end

#tasks ⇒ Object

List of all defined tasks in this application.



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# File 'lib/rake/task_manager.rb', line 137

def tasks
  @tasks.values.sort_by { |t| t.name }
end

#tasks_in_scope(scope) ⇒ Object

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



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# File 'lib/rake/task_manager.rb', line 143

def tasks_in_scope(scope)
  prefix = scope.join(":")
  tasks.select { |t|
    /^#{prefix}:/ =~ t.name
  }
end