module Rake::TaskManager

The TaskManager module is a mixin for managing tasks.

Attributes

last_comment[RW]

Track the last comment made in the Rakefile.

last_description[RW]

Track the last comment made in the Rakefile.

Public Class Methods

new() click to toggle source
Calls superclass method
# File lib/rake/task_manager.rb, line 9
def initialize
  super
  @tasks = Hash.new
  @rules = Array.new
  @scope = Scope.make
  @last_description = nil
end

Public Instance Methods

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

Find a matching task for task_name.

# File lib/rake/task_manager.rb, line 44
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() click to toggle source

Clear all tasks in this application.

# File lib/rake/task_manager.rb, line 146
def clear
  @tasks.clear
  @rules.clear
end
create_rule(*args, &block) click to toggle source
# File lib/rake/task_manager.rb, line 17
def create_rule(*args, &block)
  pattern, args, deps = resolve_args(args)
  pattern = Regexp.new(Regexp.quote(pattern) + '$') if String === pattern
  @rules << [pattern, args, deps, block]
end
current_scope() click to toggle source

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

# File lib/rake/task_manager.rb, line 186
def current_scope
  @scope
end
define_task(task_class, *args, &block) click to toggle source
# 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.map { |d| d.to_s }
  task = intern(task_class, task_name)
  task.set_arg_names(arg_names) unless arg_names.empty?
  if Rake::TaskManager.record_task_metadata
    add_location(task)
    task.add_description(get_description(task))
  end
  task.enhance(deps, &block)
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 lib/rake/task_manager.rb, line 116
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, block|
    if pattern.match(task_name)
      task = attempt_rule(task_name, args, 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) { |ns| ... } click to toggle source

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

# File lib/rake/task_manager.rb, line 192
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 lib/rake/task_manager.rb, line 39
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 lib/rake/task_manager.rb, line 156
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 triplet of [task_name, arg_name_list, prerequisites].

# File lib/rake/task_manager.rb, line 59
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) click to toggle source
# File lib/rake/task_manager.rb, line 52
def synthesize_file_task(task_name)
  return nil unless File.exist?(task_name)
  define_task(Rake::FileTask, task_name)
end
tasks() click to toggle source

List of all defined tasks in this application.

# File lib/rake/task_manager.rb, line 132
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 lib/rake/task_manager.rb, line 138
def tasks_in_scope(scope)
  prefix = scope.path
  tasks.select { |t|
    /^#{prefix}:/ =~ t.name
  }
end