/**
* Returns the configurable attribute conditions necessary to evaluate the given configured
* target, or null if not all dependencies have yet been SkyFrame-evaluated.
*/
@Nullable
private Set<ConfigMatchingProvider> getConfigurableAttributeConditions(
TargetAndConfiguration ctg, Environment env) {
if (!(ctg.getTarget() instanceof Rule)) {
return ImmutableSet.of();
}
Rule rule = (Rule) ctg.getTarget();
RawAttributeMapper mapper = RawAttributeMapper.of(rule);
Set<SkyKey> depKeys = new LinkedHashSet<>();
for (Attribute attribute : rule.getAttributes()) {
for (Label label : mapper.getConfigurabilityKeys(attribute.getName(), attribute.getType())) {
if (!BuildType.Selector.isReservedLabel(label)) {
depKeys.add(ConfiguredTargetValue.key(label, ctg.getConfiguration()));
}
}
}
Map<SkyKey, SkyValue> cts = env.getValues(depKeys);
if (env.valuesMissing()) {
return null;
}
ImmutableSet.Builder<ConfigMatchingProvider> conditions = ImmutableSet.builder();
for (SkyValue ctValue : cts.values()) {
ConfiguredTarget ct = ((ConfiguredTargetValue) ctValue).getConfiguredTarget();
conditions.add(Preconditions.checkNotNull(ct.getProvider(ConfigMatchingProvider.class)));
}
return conditions.build();
}
@Nullable
@Override
public SkyValue compute(SkyKey skyKey, Environment env)
throws SkyFunctionException, InterruptedException {
ImmutableMap<Action, ConflictException> badActions = PrecomputedValue.BAD_ACTIONS.get(env);
ConfiguredTargetValue ctValue =
(ConfiguredTargetValue)
env.getValue(ConfiguredTargetValue.key((ConfiguredTargetKey) skyKey.argument()));
SkyframeDependencyResolver resolver =
buildViewProvider.getSkyframeBuildView().createDependencyResolver(env);
if (env.valuesMissing()) {
return null;
}
for (Action action : ctValue.getActions()) {
if (badActions.containsKey(action)) {
throw new ActionConflictFunctionException(badActions.get(action));
}
}
ConfiguredTarget ct = ctValue.getConfiguredTarget();
TargetAndConfiguration ctgValue =
new TargetAndConfiguration(ct.getTarget(), ct.getConfiguration());
Set<ConfigMatchingProvider> configConditions =
getConfigurableAttributeConditions(ctgValue, env);
if (configConditions == null) {
return null;
}
ListMultimap<Attribute, Dependency> deps;
try {
BuildConfiguration hostConfiguration =
buildViewProvider.getSkyframeBuildView().getHostConfiguration(ct.getConfiguration());
deps =
resolver.dependentNodeMap(
ctgValue, hostConfiguration, /*aspect=*/ null, configConditions);
if (ct.getConfiguration() != null && ct.getConfiguration().useDynamicConfigurations()) {
deps =
ConfiguredTargetFunction.trimConfigurations(
env, ctgValue, deps, hostConfiguration, ruleClassProvider);
}
} catch (EvalException e) {
throw new PostConfiguredTargetFunctionException(e);
} catch (ConfiguredTargetFunction.DependencyEvaluationException e) {
throw new PostConfiguredTargetFunctionException(e);
}
env.getValues(Iterables.transform(deps.values(), TO_KEYS));
if (env.valuesMissing()) {
return null;
}
return new PostConfiguredTargetValue(ct);
}
/**
* Requests Skyframe to compute the dependent values and returns them.
*
* <p>The keys must all be {@link SkyFunctions#RECURSIVE_FILESYSTEM_TRAVERSAL} keys.
*/
private static Collection<RecursiveFilesystemTraversalValue> traverseChildren(
Environment env, Iterable<SkyKey> keys) throws MissingDepException {
Map<SkyKey, SkyValue> values = env.getValues(keys);
if (env.valuesMissing()) {
throw new MissingDepException();
}
return Collections2.transform(
values.values(),
new Function<SkyValue, RecursiveFilesystemTraversalValue>() {
@Override
public RecursiveFilesystemTraversalValue apply(SkyValue input) {
return (RecursiveFilesystemTraversalValue) input;
}
});
}
SkyValue computeInternal(
SkyKey skyKey, Environment env, @Nullable Set<SkyKey> visitedKeysForCycle)
throws SkyFunctionException, InterruptedException {
PackageIdentifier arg = (PackageIdentifier) skyKey.argument();
PathFragment file = arg.getPackageFragment();
ASTFileLookupValue astLookupValue = null;
try {
SkyKey astLookupKey = ASTFileLookupValue.key(arg);
astLookupValue =
(ASTFileLookupValue)
env.getValueOrThrow(
astLookupKey,
ErrorReadingSkylarkExtensionException.class,
InconsistentFilesystemException.class);
} catch (ErrorReadingSkylarkExtensionException e) {
throw new SkylarkImportLookupFunctionException(
SkylarkImportFailedException.errorReadingFile(file, e.getMessage()));
} catch (InconsistentFilesystemException e) {
throw new SkylarkImportLookupFunctionException(e, Transience.PERSISTENT);
}
if (astLookupValue == null) {
return null;
}
if (astLookupValue.getAST() == null) {
// Skylark import files have to exist.
throw new SkylarkImportLookupFunctionException(SkylarkImportFailedException.noFile(file));
}
BuildFileAST ast = astLookupValue.getAST();
if (ast.containsErrors()) {
throw new SkylarkImportLookupFunctionException(
SkylarkImportFailedException.skylarkErrors(file));
}
Label label = pathFragmentToLabel(arg.getRepository(), file, env);
if (label == null) {
Preconditions.checkState(env.valuesMissing(), "null label with no missing %s", file);
return null;
}
Map<Location, PathFragment> astImports = ast.getImports();
Map<PathFragment, Extension> importMap = Maps.newHashMapWithExpectedSize(astImports.size());
ImmutableList.Builder<SkylarkFileDependency> fileDependencies = ImmutableList.builder();
Map<SkyKey, PathFragment> skylarkImports = Maps.newHashMapWithExpectedSize(astImports.size());
for (Map.Entry<Location, PathFragment> entry : ast.getImports().entrySet()) {
try {
skylarkImports.put(
PackageFunction.getImportKey(entry, ruleClassProvider.getPreludePath(), file, arg),
entry.getValue());
} catch (ASTLookupInputException e) {
throw new SkylarkImportLookupFunctionException(e, Transience.PERSISTENT);
}
}
Map<SkyKey, SkyValue> skylarkImportMap;
boolean valuesMissing = false;
if (visitedKeysForCycle == null) {
// Not inlining.
skylarkImportMap = env.getValues(skylarkImports.keySet());
valuesMissing = env.valuesMissing();
} else {
// inlining calls to SkylarkImportLookupFunction.
if (!visitedKeysForCycle.add(skyKey)) {
ImmutableList<SkyKey> cycle =
CycleUtils.splitIntoPathAndChain(Predicates.equalTo(skyKey), visitedKeysForCycle)
.second;
if (env.getValue(SkylarkImportUniqueCycleValue.key(cycle)) == null) {
return null;
}
throw new SkylarkImportLookupFunctionException(
new SkylarkImportFailedException("Skylark import cycle"));
}
skylarkImportMap = Maps.newHashMapWithExpectedSize(astImports.size());
for (SkyKey skylarkImport : skylarkImports.keySet()) {
SkyValue skyValue = this.computeWithInlineCalls(skylarkImport, env, visitedKeysForCycle);
if (skyValue == null) {
Preconditions.checkState(
env.valuesMissing(), "no skylark import value for %s", skylarkImport);
// Don't give up on computing. This is against the Skyframe contract, but we don't want to
// pay the price of serializing all these calls, since they are fundamentally independent.
valuesMissing = true;
} else {
skylarkImportMap.put(skylarkImport, skyValue);
}
}
// All imports traversed, this key can no longer be part of a cycle.
visitedKeysForCycle.remove(skyKey);
}
if (valuesMissing) {
// This means some imports are unavailable.
return null;
}
for (Map.Entry<SkyKey, SkyValue> entry : skylarkImportMap.entrySet()) {
SkylarkImportLookupValue importLookupValue = (SkylarkImportLookupValue) entry.getValue();
importMap.put(
skylarkImports.get(entry.getKey()), importLookupValue.getEnvironmentExtension());
fileDependencies.add(importLookupValue.getDependency());
}
// Skylark UserDefinedFunction-s in that file will share this function definition Environment,
// which will be frozen by the time it is returned by createExtension.
Extension extension = createExtension(ast, file, importMap, env);
return new SkylarkImportLookupValue(
extension, new SkylarkFileDependency(label, fileDependencies.build()));
}
@Override
public SkyValue compute(SkyKey skyKey, Environment env)
throws SkyFunctionException, InterruptedException {
PackageIdentifier arg = (PackageIdentifier) skyKey.argument();
PathFragment file = arg.getPackageFragment();
ASTFileLookupValue astLookupValue = null;
try {
SkyKey astLookupKey = ASTFileLookupValue.key(arg);
astLookupValue =
(ASTFileLookupValue)
env.getValueOrThrow(
astLookupKey,
ErrorReadingSkylarkExtensionException.class,
InconsistentFilesystemException.class);
} catch (ErrorReadingSkylarkExtensionException e) {
throw new SkylarkImportLookupFunctionException(
SkylarkImportFailedException.errorReadingFile(file, e.getMessage()));
} catch (InconsistentFilesystemException e) {
throw new SkylarkImportLookupFunctionException(e, Transience.PERSISTENT);
}
if (astLookupValue == null) {
return null;
}
if (astLookupValue.getAST() == null) {
// Skylark import files have to exist.
throw new SkylarkImportLookupFunctionException(SkylarkImportFailedException.noFile(file));
}
BuildFileAST ast = astLookupValue.getAST();
if (ast.containsErrors()) {
throw new SkylarkImportLookupFunctionException(
SkylarkImportFailedException.skylarkErrors(file));
}
Map<Location, PathFragment> astImports = ast.getImports();
Map<PathFragment, Extension> importMap = Maps.newHashMapWithExpectedSize(astImports.size());
ImmutableList.Builder<SkylarkFileDependency> fileDependencies = ImmutableList.builder();
Map<SkyKey, PathFragment> skylarkImports = Maps.newHashMapWithExpectedSize(astImports.size());
for (Map.Entry<Location, PathFragment> entry : ast.getImports().entrySet()) {
try {
skylarkImports.put(
PackageFunction.getImportKey(entry, ruleClassProvider.getPreludePath(), file, arg),
entry.getValue());
} catch (ASTLookupInputException e) {
throw new SkylarkImportLookupFunctionException(e, Transience.PERSISTENT);
}
}
Map<SkyKey, SkyValue> skylarkImportMap = env.getValues(skylarkImports.keySet());
if (env.valuesMissing()) {
// This means some imports are unavailable.
return null;
}
for (Map.Entry<SkyKey, SkyValue> entry : skylarkImportMap.entrySet()) {
SkylarkImportLookupValue importLookupValue = (SkylarkImportLookupValue) entry.getValue();
importMap.put(
skylarkImports.get(entry.getKey()), importLookupValue.getEnvironmentExtension());
fileDependencies.add(importLookupValue.getDependency());
}
Label label = pathFragmentToLabel(arg.getRepository(), file, env);
if (label == null) {
Preconditions.checkState(env.valuesMissing(), "label null but no missing for %s", file);
return null;
}
// Skylark UserDefinedFunction-s in that file will share this function definition Environment,
// which will be frozen by the time it is returned by createExtension.
Extension extension = createExtension(ast, file, importMap, env);
return new SkylarkImportLookupValue(
extension, new SkylarkFileDependency(label, fileDependencies.build()));
}