void ExternalCommand::provideValue(BuildSystemCommandInterface& bsci,
core::Task*,
uintptr_t inputID,
const BuildValue& value) {
// Process the input value to see if we should skip this command.
// All direct inputs should be individual node values.
assert(!value.hasMultipleOutputs());
assert(value.isExistingInput() || value.isMissingInput() ||
value.isMissingOutput() || value.isFailedInput() ||
value.isVirtualInput());
// Predicate for whether the input should cause the command to skip.
auto shouldSkipForInput = [&] {
// If the value is an existing or virtual input, we are always good.
if (value.isExistingInput() || value.isVirtualInput())
return false;
// We explicitly allow running the command against a missing output, under
// the expectation that responsibility for reporting this situation falls to
// the command.
//
// FIXME: Eventually, it might be nice to harden the format so that we know
// when an output was actually required versus optional.
if (value.isMissingOutput())
return false;
// If the value is a missing input, but those are allowed, it is ok.
if (allowMissingInputs && value.isMissingInput())
return false;
// For anything else, this is an error and the command should be skipped.
return true;
};
// Check if we need to skip the command because of this input.
if (shouldSkipForInput()) {
shouldSkip = true;
if (value.isMissingInput()) {
hasMissingInput = true;
// FIXME: Design the logging and status output APIs.
bsci.getDelegate().error(
"", {}, (Twine("missing input '") + inputs[inputID]->getName() +
"' and no rule to build it"));
}
} else {
// If there is a missing input file (from a successful command), we always
// need to run the command.
if (value.isMissingOutput())
canUpdateIfNewer = false;
}
}
void ExternalCommand::provideValue(BuildSystemCommandInterface& bsci,
core::Task*,
uintptr_t inputID,
const BuildValue& value) {
// Process the input value to see if we should skip this command.
// All direct inputs should be individual node values.
assert(!value.hasMultipleOutputs());
assert(value.isExistingInput() || value.isMissingInput() ||
value.isMissingOutput() || value.isFailedInput() ||
value.isVirtualInput() || value.isSkippedCommand() ||
value.isDirectoryTreeSignature() || value.isStaleFileRemoval());
// If the input should cause this command to skip, how should it skip?
auto getSkipValueForInput = [&]() -> llvm::Optional<BuildValue> {
// If the value is an signature, existing, or virtual input, we are always
// good.
if (value.isDirectoryTreeSignature() | value.isExistingInput() ||
value.isVirtualInput() || value.isStaleFileRemoval())
return llvm::None;
// We explicitly allow running the command against a missing output, under
// the expectation that responsibility for reporting this situation falls to
// the command.
//
// FIXME: Eventually, it might be nice to harden the format so that we know
// when an output was actually required versus optional.
if (value.isMissingOutput())
return llvm::None;
// If the value is a missing input, but those are allowed, it is ok.
if (value.isMissingInput()) {
if (allowMissingInputs)
return llvm::None;
else
return BuildValue::makePropagatedFailureCommand();
}
// Propagate failure.
if (value.isFailedInput())
return BuildValue::makePropagatedFailureCommand();
// A skipped dependency doesn't cause this command to skip.
if (value.isSkippedCommand())
return llvm::None;
llvm_unreachable("unexpected input");
};
// Check if we need to skip the command because of this input.
auto skipValueForInput = getSkipValueForInput();
if (skipValueForInput.hasValue()) {
skipValue = std::move(skipValueForInput);
if (value.isMissingInput()) {
hasMissingInput = true;
// FIXME: Design the logging and status output APIs.
bsci.getDelegate().error(
"", {}, (Twine("missing input '") + inputs[inputID]->getName() +
"' and no rule to build it"));
}
} else {
// If there is a missing input file (from a successful command), we always
// need to run the command.
if (value.isMissingOutput())
canUpdateIfNewer = false;
}
}