def collect_node_states(self):
# returns (is_up_to_date, cached_error, cachable)
# where is_up_to_date is 1, if the node(s) are up_to_date
# cached_error is 1, if the node(s) are up_to_date, but the
# build will fail
# cachable is 0, if some nodes are not in our cache
T = 0
changed = False
cached_error = False
cachable = True
for t in self.targets:
if T: Trace('%s' % (t))
bi = t.get_stored_info().binfo
if isinstance(bi, SConfBuildInfo):
if T: Trace(': SConfBuildInfo')
if cache_mode == CACHE:
t.set_state(SCons.Node.up_to_date)
if T: Trace(': set_state(up_to-date)')
else:
if T: Trace(': get_state() %s' % t.get_state())
if T: Trace(': changed() %s' % t.changed())
if (t.get_state() != SCons.Node.up_to_date
and t.changed()):
changed = True
if T: Trace(': changed %s' % changed)
cached_error = cached_error or bi.result
else:
if T: Trace(': else')
# the node hasn't been built in a SConf context or doesn't
# exist
cachable = False
changed = (t.get_state() != SCons.Node.up_to_date)
if T: Trace(': changed %s' % changed)
if T: Trace('\n')
return (not changed, cached_error, cachable)
def changed(self, node=None):
"""
Returns if the node is up-to-date with respect to the BuildInfo
stored last time it was built. The default behavior is to compare
it against our own previously stored BuildInfo, but the stored
BuildInfo from another Node (typically one in a Repository)
can be used instead.
Note that we now *always* check every dependency. We used to
short-circuit the check by returning as soon as we detected
any difference, but we now rely on checking every dependency
to make sure that any necessary Node information (for example,
the content signature of an #included .h file) is updated.
"""
t = 0
if t: Trace('changed(%s [%s], %s)' % (self, classname(self), node))
if node is None:
node = self
result = False
bi = node.get_stored_info().binfo
then = bi.bsourcesigs + bi.bdependsigs + bi.bimplicitsigs
children = self.children()
diff = len(children) - len(then)
if diff:
# The old and new dependency lists are different lengths.
# This always indicates that the Node must be rebuilt.
# We also extend the old dependency list with enough None
# entries to equal the new dependency list, for the benefit
# of the loop below that updates node information.
then.extend([None] * diff)
result = True
for child, prev_ni in zip(children, then):
if child.changed_since_last_build(self, prev_ni):
if t: Trace(': %s changed' % child)
result = True
contents = self.get_executor().get_contents()
if self.has_builder():
import SCons.Util
newsig = SCons.Util.MD5signature(contents)
if bi.bactsig != newsig:
if t: Trace(': bactsig %s != newsig %s' % (bi.bactsig, newsig))
result = True
if not result:
if t: Trace(': up to date')
if t: Trace('\n')
return result
def trace(token, newstate):
from SCons.Debug import Trace
statename = newstate.__class__.__name__
Trace('token = %s, state = %s\n' % (repr(token), statename))
