def _register_singletons(self, singletons):
"""Register the given singletons dict.
Singleton tasks are those that are the default for a particular type(product). Like
intrinsics, singleton tasks create Runnables that are not cacheable.
"""
for product_type, rule in singletons.items():
self._native.lib.singleton_task_add(
self._scheduler, Function(self._to_id(rule.func)),
self._to_constraint(product_type))
def _register_tasks(self, tasks):
"""Register the given tasks dict with the native scheduler."""
registered = set()
for output_type, rules in tasks.items():
output_constraint = self._to_constraint(output_type)
for rule in rules:
# TODO: The task map has heterogeneous keys, so we normalize them to type constraints
# and dedupe them before registering to the native engine:
# see: https://github.com/pantsbuild/pants/issues/4005
key = (output_constraint, rule)
if key in registered:
continue
registered.add(key)
_, input_selects, func = rule.as_triple()
self._native.lib.tasks_task_begin(self._tasks, Function(self._to_id(func)), output_constraint)
for selector in input_selects:
selector_type = type(selector)
product_constraint = self._to_constraint(selector.product)
if selector_type is Select:
self._native.lib.tasks_add_select(self._tasks, product_constraint)
elif selector_type is SelectVariant:
key_buf = self._to_utf8_buf(selector.variant_key)
self._native.lib.tasks_add_select_variant(self._tasks,
product_constraint,
key_buf)
elif selector_type is SelectLiteral:
# NB: Intentionally ignores subject parameter to provide a literal subject.
self._native.lib.tasks_add_select_literal(self._tasks,
self._to_key(selector.subject),
product_constraint)
elif selector_type is SelectDependencies:
self._native.lib.tasks_add_select_dependencies(self._tasks,
product_constraint,
self._to_constraint(selector.dep_product),
self._to_utf8_buf(selector.field),
self._to_ids_buf(selector.field_types))
elif selector_type is SelectTransitive:
self._native.lib.tasks_add_select_transitive(self._tasks,
product_constraint,
self._to_constraint(selector.dep_product),
self._to_utf8_buf(selector.field),
self._to_ids_buf(selector.field_types))
elif selector_type is SelectProjection:
if len(selector.fields) != 1:
raise ValueError("TODO: remove support for projecting multiple fields at once.")
field = selector.fields[0]
self._native.lib.tasks_add_select_projection(self._tasks,
self._to_constraint(selector.product),
TypeId(self._to_id(selector.projected_subject)),
self._to_utf8_buf(field),
self._to_constraint(selector.input_product))
else:
raise ValueError('Unrecognized Selector type: {}'.format(selector))
self._native.lib.tasks_task_end(self._tasks)
def _register_intrinsics(self, intrinsics):
"""Register the given intrinsics dict.
Intrinsic tasks are those that are the default for a particular type(subject), type(product)
pair. By default, intrinsic tasks create Runnables that are not cacheable.
"""
for (subject_type, product_type), rule in intrinsics.items():
self._native.lib.intrinsic_task_add(
self._scheduler, Function(self._to_id(rule.func)),
TypeId(self._to_id(subject_type)),
self._to_constraint(subject_type),
self._to_constraint(product_type))
def _register_task(self, output_constraint, rule):
"""Register the given TaskRule with the native scheduler."""
input_selects = rule.input_selectors
func = rule.func
self._native.lib.tasks_task_begin(self._tasks,
Function(self._to_id(func)),
output_constraint)
for selector in input_selects:
selector_type = type(selector)
product_constraint = self._to_constraint(selector.product)
if selector_type is Select:
self._native.lib.tasks_add_select(self._tasks,
product_constraint)
elif selector_type is SelectVariant:
key_buf = self._to_utf8_buf(selector.variant_key)
self._native.lib.tasks_add_select_variant(
self._tasks, product_constraint, key_buf)
elif selector_type is SelectDependencies:
self._native.lib.tasks_add_select_dependencies(
self._tasks, product_constraint,
self._to_constraint(selector.dep_product),
self._to_utf8_buf(selector.field),
self._to_ids_buf(selector.field_types))
elif selector_type is SelectTransitive:
self._native.lib.tasks_add_select_transitive(
self._tasks, product_constraint,
self._to_constraint(selector.dep_product),
self._to_utf8_buf(selector.field),
self._to_ids_buf(selector.field_types))
elif selector_type is SelectProjection:
self._native.lib.tasks_add_select_projection(
self._tasks, self._to_constraint(selector.product),
TypeId(self._to_id(selector.projected_subject)),
self._to_utf8_buf(selector.field),
self._to_constraint(selector.input_product))
else:
raise ValueError(
'Unrecognized Selector type: {}'.format(selector))
self._native.lib.tasks_task_end(self._tasks)