private static <T> T cast(
String paramName, ClassObject struct, Class<T> expectedType, Location loc)
throws EvalException {
Object value = struct.getValue(paramName);
return SkylarkType.cast(
value,
expectedType,
loc,
"expected %s for '%s' but got %s instead: %s",
SkylarkType.of(expectedType),
paramName,
EvalUtils.getDataTypeName(value, false),
value);
}
private void checkCompositeSkylarkObjectSafe(Object object) {
if (object instanceof SkylarkApiProvider) {
return;
} else if (object instanceof SkylarkList) {
SkylarkList list = (SkylarkList) object;
if (list == SkylarkList.EMPTY_LIST
|| isSimpleSkylarkObjectSafe(list.getContentType().getType())) {
// Try not to iterate over the list if avoidable.
return;
}
// The list can be a tuple or a list of composite items.
for (Object listItem : list) {
checkSkylarkObjectSafe(listItem);
}
return;
} else if (object instanceof SkylarkNestedSet) {
// SkylarkNestedSets cannot have composite items.
Class<?> contentType = ((SkylarkNestedSet) object).getContentType().getType();
if (!contentType.equals(Object.class) && !isSimpleSkylarkObjectSafe(contentType)) {
throw new IllegalArgumentException(EvalUtils.getDataTypeName(contentType));
}
return;
} else if (object instanceof Map<?, ?>) {
for (Map.Entry<?, ?> entry : ((Map<?, ?>) object).entrySet()) {
checkSkylarkObjectSafe(entry.getKey());
checkSkylarkObjectSafe(entry.getValue());
}
return;
} else if (object instanceof ClassObject) {
ClassObject struct = (ClassObject) object;
for (String key : struct.getKeys()) {
checkSkylarkObjectSafe(struct.getValue(key));
}
return;
}
throw new IllegalArgumentException(EvalUtils.getDataTypeName(object));
}
private static void addOutputGroups(
Object value, Location loc, RuleConfiguredTargetBuilder builder) throws EvalException {
Map<String, SkylarkValue> outputGroups =
SkylarkType.castMap(value, String.class, SkylarkValue.class, "output_groups");
for (String outputGroup : outputGroups.keySet()) {
SkylarkValue objects = outputGroups.get(outputGroup);
NestedSet<Artifact> artifacts;
String typeErrorMessage =
"Output group '%s' is of unexpected type. "
+ "Should be list or set of Files, but got '%s' instead.";
if (objects instanceof SkylarkList) {
NestedSetBuilder<Artifact> nestedSetBuilder = NestedSetBuilder.stableOrder();
for (Object o : (SkylarkList) objects) {
if (o instanceof Artifact) {
nestedSetBuilder.add((Artifact) o);
} else {
throw new EvalException(
loc,
String.format(
typeErrorMessage,
outputGroup,
"list with an element of " + EvalUtils.getDataTypeNameFromClass(o.getClass())));
}
}
artifacts = nestedSetBuilder.build();
} else {
artifacts =
SkylarkType.cast(
objects,
SkylarkNestedSet.class,
Artifact.class,
loc,
typeErrorMessage,
outputGroup,
EvalUtils.getDataTypeName(objects, true))
.getSet(Artifact.class);
}
builder.addOutputGroup(outputGroup, artifacts);
}
}
@Override
public boolean containsKey(Object key, Location loc) throws EvalException {
if (!(key instanceof SkylarkClassObjectConstructor)) {
throw new EvalException(
loc,
String.format(
"Type Target only supports querying by object constructors, got %s instead",
EvalUtils.getDataTypeName(key)));
}
SkylarkClassObjectConstructor constructor = (SkylarkClassObjectConstructor) key;
SkylarkProviders provider = getProvider(SkylarkProviders.class);
if (provider != null) {
Object declaredProvider = provider.getDeclaredProvider(constructor.getKey());
if (declaredProvider != null) {
return true;
}
}
return false;
}
@Override
public Object getIndex(Object key, Location loc) throws EvalException {
if (!(key instanceof SkylarkClassObjectConstructor)) {
throw new EvalException(
loc,
String.format(
"Type Target only supports indexing by object constructors, got %s instead",
EvalUtils.getDataTypeName(key)));
}
SkylarkClassObjectConstructor constructor = (SkylarkClassObjectConstructor) key;
SkylarkProviders provider = getProvider(SkylarkProviders.class);
if (provider != null) {
Object declaredProvider = provider.getDeclaredProvider(constructor.getKey());
if (declaredProvider != null) {
return declaredProvider;
}
}
// Either provider or declaredProvider is null
throw new EvalException(
loc,
String.format(
"Object of type Target doesn't contain declared provider %s",
constructor.getKey().getExportedName()));
}
private void resolveLateBoundAttributes(
Rule rule,
BuildConfiguration configuration,
BuildConfiguration hostConfiguration,
AttributeMap attributeMap,
Iterable<Attribute> attributes,
ImmutableSortedKeyListMultimap.Builder<Attribute, LabelAndConfiguration> builder)
throws EvalException, InterruptedException {
for (Attribute attribute : attributes) {
if (!attribute.isLateBound() || !attribute.getCondition().apply(attributeMap)) {
continue;
}
List<BuildConfiguration> actualConfigurations = ImmutableList.of(configuration);
if (attribute.getConfigurationTransition() instanceof SplitTransition<?>) {
Preconditions.checkState(attribute.getConfigurator() == null);
// TODO(bazel-team): This ends up applying the split transition twice, both here and in the
// visitRule method below - this is not currently a problem, because the configuration graph
// never contains nested split transitions, so the second application is idempotent.
actualConfigurations =
configuration.getSplitConfigurations(
(SplitTransition<?>) attribute.getConfigurationTransition());
}
for (BuildConfiguration actualConfig : actualConfigurations) {
@SuppressWarnings("unchecked")
LateBoundDefault<BuildConfiguration> lateBoundDefault =
(LateBoundDefault<BuildConfiguration>) attribute.getLateBoundDefault();
if (lateBoundDefault.useHostConfiguration()) {
actualConfig = hostConfiguration;
}
// TODO(bazel-team): This might be too expensive - can we cache this somehow?
if (!lateBoundDefault.getRequiredConfigurationFragments().isEmpty()) {
if (!actualConfig.hasAllFragments(lateBoundDefault.getRequiredConfigurationFragments())) {
continue;
}
}
// TODO(bazel-team): We should check if the implementation tries to access an undeclared
// fragment.
Object actualValue = lateBoundDefault.getDefault(rule, actualConfig);
if (EvalUtils.isNullOrNone(actualValue)) {
continue;
}
try {
if (attribute.getType() == BuildType.LABEL) {
Label label = BuildType.LABEL.cast(actualValue);
builder.put(attribute, LabelAndConfiguration.of(label, actualConfig));
} else if (attribute.getType() == BuildType.LABEL_LIST) {
for (Label label : BuildType.LABEL_LIST.cast(actualValue)) {
builder.put(attribute, LabelAndConfiguration.of(label, actualConfig));
}
} else {
throw new IllegalStateException(
String.format(
"Late bound attribute '%s' is not a label or a label list",
attribute.getName()));
}
} catch (ClassCastException e) {
throw new EvalException(
rule.getLocation(),
String.format(
"When computing the default value of %s, expected '%s', got '%s'",
attribute.getName(),
attribute.getType(),
EvalUtils.getDataTypeName(actualValue, true)));
}
}
}
}