def sig_implicit_deps(self):
bld = self.generator.bld
key = self.uid()
prev = bld.imp_sigs.get(key, [])
if prev:
try:
if prev == self.compute_sig_implicit_deps():
return prev
except Errors.TaskNotReady:
raise
except EnvironmentError:
for x in bld.node_deps.get(self.uid(), []):
if not x.is_bld() and not x.exists():
try:
del x.parent.children[x.name]
except KeyError:
pass
del bld.imp_sigs[key]
raise Errors.TaskRescan('rescan')
(bld.node_deps[key], bld.raw_deps[key]) = self.scan()
if Logs.verbose:
Logs.debug('deps: scanner for %s: %r; unresolved: %r', self,
bld.node_deps[key], bld.raw_deps[key])
try:
bld.imp_sigs[key] = self.compute_sig_implicit_deps()
except EnvironmentError:
for k in bld.node_deps.get(self.uid(), []):
if not k.exists():
Logs.warn(
'Dependency %r for %r is missing: check the task declaration and the build order!',
k, self)
raise
def sig_implicit_deps(self):
"""
Used by :py:meth:`waflib.Task.Task.signature`; it hashes node signatures
obtained by scanning for dependencies (:py:meth:`waflib.Task.Task.scan`).
The exception :py:class:`waflib.Errors.TaskRescan` is thrown
when a file has changed. In this case, the method :py:meth:`waflib.Task.Task.signature` is called
once again, and return here to call :py:meth:`waflib.Task.Task.scan` and searching for dependencies.
"""
bld = self.generator.bld
# get the task signatures from previous runs
key = self.uid()
prev = bld.imp_sigs.get(key, [])
# for issue #379
if prev:
try:
if prev == self.compute_sig_implicit_deps():
return prev
except Errors.TaskNotReady:
raise
except OSError:
# when a file was renamed, remove the stale nodes (headers in folders without source files)
# this will break the order calculation for headers created during the build in the source directory (should be uncommon)
# the behaviour will differ when top != out
for x in bld.node_deps.get(self.uid(), []):
if not x.is_bld() and not x.exists():
try:
del x.parent.children[x.name]
except KeyError:
pass
del bld.imp_sigs[key]
raise Errors.TaskRescan("rescan")
# no previous run or the signature of the dependencies has changed, rescan the dependencies
(bld.node_deps[key], bld.raw_deps[key]) = self.scan()
if Logs.verbose:
Logs.debug(
"deps: scanner for %s: %r; unresolved: %r",
self,
bld.node_deps[key],
bld.raw_deps[key],
)
# recompute the signature and return it
try:
bld.imp_sigs[key] = self.compute_sig_implicit_deps()
except OSError:
for k in bld.node_deps.get(self.uid(), []):
if not k.exists():
Logs.warn(
"Dependency %r for %r is missing: check the task declaration and the build order!",
k,
self,
)
raise
def sig_implicit_deps(self):
bld = self.generator.bld
key = self.uid()
prev = bld.task_sigs.get((key, 'imp'), [])
if prev:
try:
if prev == self.compute_sig_implicit_deps():
return prev
except Errors.TaskNotReady:
raise
except EnvironmentError:
for x in bld.node_deps.get(self.uid(), []):
if not x.is_bld():
try:
os.stat(x.abspath())
except OSError:
try:
del x.parent.children[x.name]
except KeyError:
pass
del bld.task_sigs[(key, 'imp')]
raise Errors.TaskRescan('rescan')
(nodes, names) = self.scan()
if Logs.verbose:
Logs.debug('deps: scanner for %s returned %s %s' %
(str(self), str(nodes), str(names)))
bld.node_deps[key] = nodes
bld.raw_deps[key] = names
self.are_implicit_nodes_ready()
try:
bld.task_sigs[(key,
'imp')] = sig = self.compute_sig_implicit_deps()
except Exception:
if Logs.verbose:
for k in bld.node_deps.get(self.uid(), []):
try:
k.get_bld_sig()
except Exception:
Logs.warn(
'Missing signature for node %r (may cause rebuilds)'
% k)
else:
return sig
def sig_implicit_deps(self):
bld = self.generator.bld
key = self.uid()
prev = bld.task_sigs.get((key, 'imp'), [])
if prev:
try:
if prev == self.compute_sig_implicit_deps():
return prev
except IOError:
pass
del bld.task_sigs[(key, 'imp')]
raise Errors.TaskRescan('rescan')
(nodes, names) = self.scan()
if Logs.verbose:
Logs.debug('deps: scanner for %s returned %s %s' %
(str(self), str(nodes), str(names)))
bld.node_deps[key] = nodes
bld.raw_deps[key] = names
self.are_implicit_nodes_ready()
bld.task_sigs[(key, 'imp')] = sig = self.compute_sig_implicit_deps()
return sig
def sig_implicit_deps(self):
"""
Used by :py:meth:`waflib.Task.Task.signature` hashes node signatures obtained by scanning for dependencies (:py:meth:`waflib.Task.Task.scan`).
The exception :py:class:`waflib.Errors.TaskRescan` is thrown
when a file has changed. When this occurs, :py:meth:`waflib.Task.Task.signature` is called
once again, and this method will be executed once again, this time calling :py:meth:`waflib.Task.Task.scan`
for searching the dependencies.
:rtype: hash value
"""
bld = self.generator.bld
# get the task signatures from previous runs
key = self.uid()
prev = bld.task_sigs.get((key, 'imp'), [])
# for issue #379
if prev:
try:
if prev == self.compute_sig_implicit_deps():
return prev
except Exception:
# when a file was renamed (IOError usually), remove the stale nodes (headers in folders without source files)
# this will break the order calculation for headers created during the build in the source directory (should be uncommon)
# the behaviour will differ when top != out
for x in bld.node_deps.get(self.uid(), []):
if x.is_child_of(bld.srcnode):
try:
os.stat(x.abspath())
except OSError:
try:
del x.parent.children[x.name]
except KeyError:
pass
del bld.task_sigs[(key, 'imp')]
raise Errors.TaskRescan('rescan')
# no previous run or the signature of the dependencies has changed, rescan the dependencies
(nodes, names) = self.scan()
if Logs.verbose:
Logs.debug('deps: scanner for %s returned %s %s' %
(str(self), str(nodes), str(names)))
# store the dependencies in the cache
bld.node_deps[key] = nodes
bld.raw_deps[key] = names
# might happen
self.are_implicit_nodes_ready()
# recompute the signature and return it
try:
old_sig_debug_log = self.sig_implicit_debug_log
bld.task_sigs[(key,
'imp')] = sig = self.compute_sig_implicit_deps()
# Make the equality check since it's possible we didn't have a prior imp key but had prior nodes
# and said nodes didn't change
if Logs.sig_delta and old_sig_debug_log != self.sig_implicit_debug_log:
self.capture_signature_log('\nImplicit(Old):\n')
self.capture_signature_log(old_sig_debug_log)
self.capture_signature_log('\nImplicit(New):\n')
self.capture_signature_log(self.sig_implicit_debug_log)
except Exception:
if Logs.verbose:
for k in bld.node_deps.get(self.uid(), []):
try:
k.get_bld_sig()
except Exception:
Logs.warn(
'Missing signature for node %r (may cause rebuilds)'
% k)
self.capture_signature_log(
'Missing signature for node %r (may cause rebuilds)\n'
% k)
else:
return sig