blob: 6b8b434c0b0659164e9275e8f7f537d07afcee13 [file] [log] [blame]
// Copyright 2014 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.devtools.build.lib.analysis;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Joiner;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.base.Predicate;
import com.google.common.base.Predicates;
import com.google.common.collect.ImmutableCollection;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableListMultimap;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.ImmutableSortedSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.ListMultimap;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Multimaps;
import com.google.common.collect.Sets;
import com.google.devtools.build.lib.actions.Action;
import com.google.devtools.build.lib.actions.ActionAnalysisMetadata;
import com.google.devtools.build.lib.actions.ActionKeyContext;
import com.google.devtools.build.lib.actions.ActionLookupValue;
import com.google.devtools.build.lib.actions.ActionOwner;
import com.google.devtools.build.lib.actions.ActionRegistry;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.actions.Artifact.SpecialArtifact;
import com.google.devtools.build.lib.actions.ArtifactOwner;
import com.google.devtools.build.lib.actions.ArtifactRoot;
import com.google.devtools.build.lib.analysis.AliasProvider.TargetMode;
import com.google.devtools.build.lib.analysis.ConfiguredRuleClassProvider.PrerequisiteValidator;
import com.google.devtools.build.lib.analysis.actions.ActionConstructionContext;
import com.google.devtools.build.lib.analysis.buildinfo.BuildInfoFactory.BuildInfoKey;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration.Fragment;
import com.google.devtools.build.lib.analysis.config.BuildOptions;
import com.google.devtools.build.lib.analysis.config.ConfigMatchingProvider;
import com.google.devtools.build.lib.analysis.config.FragmentCollection;
import com.google.devtools.build.lib.analysis.config.transitions.ConfigurationTransition;
import com.google.devtools.build.lib.analysis.config.transitions.NoTransition;
import com.google.devtools.build.lib.analysis.config.transitions.SplitTransition;
import com.google.devtools.build.lib.analysis.config.transitions.TransitionFactory;
import com.google.devtools.build.lib.analysis.configuredtargets.RuleConfiguredTarget.Mode;
import com.google.devtools.build.lib.analysis.constraints.ConstraintSemantics;
import com.google.devtools.build.lib.analysis.platform.PlatformInfo;
import com.google.devtools.build.lib.analysis.skylark.SymbolGenerator;
import com.google.devtools.build.lib.analysis.stringtemplate.TemplateContext;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.cmdline.RepositoryName;
import com.google.devtools.build.lib.collect.ImmutableSortedKeyListMultimap;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.events.ExtendedEventHandler.Postable;
import com.google.devtools.build.lib.events.Location;
import com.google.devtools.build.lib.packages.Aspect;
import com.google.devtools.build.lib.packages.AspectDescriptor;
import com.google.devtools.build.lib.packages.Attribute;
import com.google.devtools.build.lib.packages.AttributeMap;
import com.google.devtools.build.lib.packages.AttributeTransitionData;
import com.google.devtools.build.lib.packages.BuildType;
import com.google.devtools.build.lib.packages.BuiltinProvider;
import com.google.devtools.build.lib.packages.ConfigurationFragmentPolicy;
import com.google.devtools.build.lib.packages.ConfiguredAttributeMapper;
import com.google.devtools.build.lib.packages.FileTarget;
import com.google.devtools.build.lib.packages.FilesetEntry;
import com.google.devtools.build.lib.packages.ImplicitOutputsFunction;
import com.google.devtools.build.lib.packages.Info;
import com.google.devtools.build.lib.packages.InfoInterface;
import com.google.devtools.build.lib.packages.InputFile;
import com.google.devtools.build.lib.packages.NativeProvider;
import com.google.devtools.build.lib.packages.OutputFile;
import com.google.devtools.build.lib.packages.PackageSpecification.PackageGroupContents;
import com.google.devtools.build.lib.packages.RawAttributeMapper;
import com.google.devtools.build.lib.packages.RequiredProviders;
import com.google.devtools.build.lib.packages.Rule;
import com.google.devtools.build.lib.packages.RuleClass;
import com.google.devtools.build.lib.packages.RuleErrorConsumer;
import com.google.devtools.build.lib.packages.Target;
import com.google.devtools.build.lib.packages.TargetUtils;
import com.google.devtools.build.lib.skyframe.ConfiguredTargetAndData;
import com.google.devtools.build.lib.syntax.EvalException;
import com.google.devtools.build.lib.syntax.Type;
import com.google.devtools.build.lib.syntax.Type.LabelClass;
import com.google.devtools.build.lib.util.FileTypeSet;
import com.google.devtools.build.lib.util.OS;
import com.google.devtools.build.lib.util.OrderedSetMultimap;
import com.google.devtools.build.lib.util.StringUtil;
import com.google.devtools.build.lib.vfs.FileSystemUtils;
import com.google.devtools.build.lib.vfs.PathFragment;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import javax.annotation.Nullable;
/**
* The totality of data available during the analysis of a rule.
*
* <p>These objects should not outlast the analysis phase. Do not pass them to {@link Action}
* objects or other persistent objects. There are internal tests to ensure that RuleContext objects
* are not persisted that check the name of this class, so update those tests if you change this
* class's name.
*
* @see com.google.devtools.build.lib.analysis.RuleConfiguredTargetFactory
*/
public final class RuleContext extends TargetContext
implements ActionConstructionContext, ActionRegistry, RuleErrorConsumer {
/**
* The configured version of FilesetEntry.
*/
@Immutable
public static final class ConfiguredFilesetEntry {
private final FilesetEntry entry;
private final TransitiveInfoCollection src;
private final ImmutableList<TransitiveInfoCollection> files;
ConfiguredFilesetEntry(FilesetEntry entry, TransitiveInfoCollection src) {
this.entry = entry;
this.src = src;
this.files = null;
}
ConfiguredFilesetEntry(FilesetEntry entry, ImmutableList<TransitiveInfoCollection> files) {
this.entry = entry;
this.src = null;
this.files = files;
}
public FilesetEntry getEntry() {
return entry;
}
public TransitiveInfoCollection getSrc() {
return src;
}
/**
* Targets from FilesetEntry.files, or null if the user omitted it.
*/
@Nullable
public ImmutableList<TransitiveInfoCollection> getFiles() {
return files;
}
}
private static final String HOST_CONFIGURATION_PROGRESS_TAG = "for host";
private final Rule rule;
/**
* A list of all aspects applied to the target. If this <code>RuleContext</code>
* is for a rule implementation, <code>aspects</code> is an empty list.
*
* Otherwise, the last aspect in <code>aspects</code> list is the aspect which
* this <code>RuleCointext</code> is for.
*/
private final ImmutableList<Aspect> aspects;
private final ImmutableList<AspectDescriptor> aspectDescriptors;
private final ListMultimap<String, ConfiguredTargetAndData> targetMap;
private final ListMultimap<String, ConfiguredFilesetEntry> filesetEntryMap;
private final ImmutableMap<Label, ConfigMatchingProvider> configConditions;
private final AspectAwareAttributeMapper attributes;
private final ImmutableSet<String> enabledFeatures;
private final ImmutableSet<String> disabledFeatures;
private final String ruleClassNameForLogging;
private final BuildConfiguration hostConfiguration;
private final ConfigurationFragmentPolicy configurationFragmentPolicy;
private final ImmutableList<Class<? extends BuildConfiguration.Fragment>> universalFragments;
private final RuleErrorConsumer reporter;
@Nullable private final ToolchainContext toolchainContext;
private final ConstraintSemantics constraintSemantics;
private ActionOwner actionOwner;
private final SymbolGenerator<ActionLookupValue.ActionLookupKey> actionOwnerSymbolGenerator;
/* lazily computed cache for Make variables, computed from the above. See get... method */
private transient ConfigurationMakeVariableContext configurationMakeVariableContext = null;
private RuleContext(
Builder builder,
AttributeMap attributes,
ListMultimap<String, ConfiguredTargetAndData> targetMap,
ListMultimap<String, ConfiguredFilesetEntry> filesetEntryMap,
ImmutableMap<Label, ConfigMatchingProvider> configConditions,
ImmutableList<Class<? extends Fragment>> universalFragments,
String ruleClassNameForLogging,
ActionLookupValue.ActionLookupKey actionLookupKey,
ImmutableMap<String, Attribute> aspectAttributes,
@Nullable ToolchainContext toolchainContext,
ConstraintSemantics constraintSemantics) {
super(
builder.env,
builder.target.getAssociatedRule(),
builder.configuration,
builder.prerequisiteMap.get(null),
builder.visibility);
this.rule = builder.target.getAssociatedRule();
this.aspects = builder.aspects;
this.aspectDescriptors =
builder
.aspects
.stream()
.map(a -> a.getDescriptor())
.collect(ImmutableList.toImmutableList());
this.configurationFragmentPolicy = builder.configurationFragmentPolicy;
this.universalFragments = universalFragments;
this.targetMap = targetMap;
this.filesetEntryMap = filesetEntryMap;
this.configConditions = configConditions;
this.attributes = new AspectAwareAttributeMapper(attributes, aspectAttributes);
Set<String> allEnabledFeatures = new HashSet<>();
Set<String> allDisabledFeatures = new HashSet<>();
getAllFeatures(allEnabledFeatures, allDisabledFeatures);
this.enabledFeatures = ImmutableSortedSet.copyOf(allEnabledFeatures);
this.disabledFeatures = ImmutableSortedSet.copyOf(allDisabledFeatures);
this.ruleClassNameForLogging = ruleClassNameForLogging;
this.hostConfiguration = builder.hostConfiguration;
this.actionOwnerSymbolGenerator = new SymbolGenerator<>(actionLookupKey);
reporter = builder.reporter;
this.toolchainContext = toolchainContext;
this.constraintSemantics = constraintSemantics;
}
private void getAllFeatures(Set<String> allEnabledFeatures, Set<String> allDisabledFeatures) {
Set<String> globallyEnabled = new HashSet<>();
Set<String> globallyDisabled = new HashSet<>();
parseFeatures(getConfiguration().getDefaultFeatures(), globallyEnabled, globallyDisabled);
Set<String> packageEnabled = new HashSet<>();
Set<String> packageDisabled = new HashSet<>();
parseFeatures(getRule().getPackage().getFeatures(), packageEnabled, packageDisabled);
Set<String> ruleEnabled = new HashSet<>();
Set<String> ruleDisabled = new HashSet<>();
if (attributes().has("features", Type.STRING_LIST)) {
parseFeatures(attributes().get("features", Type.STRING_LIST), ruleEnabled, ruleDisabled);
}
Set<String> ruleDisabledFeatures =
Sets.union(ruleDisabled, Sets.difference(packageDisabled, ruleEnabled));
allDisabledFeatures.addAll(Sets.union(ruleDisabledFeatures, globallyDisabled));
Set<String> packageFeatures =
Sets.difference(Sets.union(globallyEnabled, packageEnabled), packageDisabled);
Set<String> ruleFeatures =
Sets.difference(Sets.union(packageFeatures, ruleEnabled), ruleDisabled);
allEnabledFeatures.addAll(Sets.difference(ruleFeatures, globallyDisabled));
}
private void parseFeatures(Iterable<String> features, Set<String> enabled, Set<String> disabled) {
for (String feature : features) {
if (feature.startsWith("-")) {
disabled.add(feature.substring(1));
} else if (feature.equals("no_layering_check")) {
// TODO(bazel-team): Remove once we do not have BUILD files left that contain
// 'no_layering_check'.
disabled.add(feature.substring(3));
} else {
enabled.add(feature);
}
}
}
public RepositoryName getRepository() {
return rule.getRepository();
}
@Override
public ArtifactRoot getBinDirectory() {
return getConfiguration().getBinDirectory(rule.getRepository());
}
@Override
public ArtifactRoot getMiddlemanDirectory() {
return getConfiguration().getMiddlemanDirectory(rule.getRepository());
}
public Rule getRule() {
return rule;
}
public ImmutableList<Aspect> getAspects() {
return aspects;
}
/**
* If this target's configuration suppresses analysis failures, this returns a list
* of strings, where each string corresponds to a description of an error that occurred during
* processing this target.
*
* @throws IllegalStateException if this target's configuration does not suppress analysis
* failures (if {@code getConfiguration().allowAnalysisFailures()} is false)
*/
public List<String> getSuppressedErrorMessages() {
Preconditions.checkState(getConfiguration().allowAnalysisFailures(),
"Error messages can only be retrieved via RuleContext if allow_analysis_failures is true");
Preconditions.checkState(reporter instanceof SuppressingErrorReporter,
"Unexpected error reporter");
return ((SuppressingErrorReporter) reporter).getErrorMessages();
}
/**
* If this <code>RuleContext</code> is for an aspect implementation, returns that aspect.
* (it is the last aspect in the list of aspects applied to a target; all other aspects
* are the ones main aspect sees as specified by its "required_aspect_providers")
* Otherwise returns <code>null</code>.
*/
@Nullable
public Aspect getMainAspect() {
return aspects.isEmpty() ? null : aspects.get(aspects.size() - 1);
}
/**
* Returns a rule class name suitable for log messages, including an aspect name if applicable.
*/
public String getRuleClassNameForLogging() {
return ruleClassNameForLogging;
}
/**
* Returns the workspace name for the rule.
*/
public String getWorkspaceName() {
return rule.getRepository().strippedName();
}
/**
* The configuration conditions that trigger this rule's configurable attributes.
*/
public ImmutableMap<Label, ConfigMatchingProvider> getConfigConditions() {
return configConditions;
}
/**
* Returns the host configuration for this rule.
*/
public BuildConfiguration getHostConfiguration() {
return hostConfiguration;
}
/**
* All aspects applied to the rule.
*/
public ImmutableList<AspectDescriptor> getAspectDescriptors() {
return aspectDescriptors;
}
/**
* Accessor for the attributes of the rule and its aspects.
*
* <p>The rule's native attributes can be queried both on their structure / existence and values
* Aspect attributes can only be queried on their structure.
*
* <p>This should be the sole interface for reading rule/aspect attributes in {@link RuleContext}.
* Don't expose other access points through new public methods.
*/
public AttributeMap attributes() {
return attributes;
}
@Override
public boolean hasErrors() {
return getAnalysisEnvironment().hasErrors();
}
/**
* Returns an immutable map from attribute name to list of configured targets for that attribute.
*/
public ListMultimap<String, ? extends TransitiveInfoCollection> getConfiguredTargetMap() {
return Multimaps.transformValues(targetMap, ConfiguredTargetAndData::getConfiguredTarget);
}
/**
* Returns an immutable map from attribute name to list of {@link ConfiguredTargetAndData} objects
* for that attribute.
*/
public ListMultimap<String, ConfiguredTargetAndData> getConfiguredTargetAndDataMap() {
return targetMap;
}
private List<ConfiguredTargetAndData> getConfiguredTargetAndTargetDeps(String key) {
return targetMap.get(key);
}
/**
* Returns an immutable map from attribute name to list of fileset entries.
*/
public ListMultimap<String, ConfiguredFilesetEntry> getFilesetEntryMap() {
return filesetEntryMap;
}
@Override
public ActionOwner getActionOwner() {
if (actionOwner == null) {
actionOwner =
createActionOwner(rule, aspectDescriptors, getConfiguration(), getExecutionPlatform());
}
return actionOwner;
}
/**
* We have to re-implement this method here because it is declared in the interface {@link
* ActionConstructionContext}. This class inherits from {@link TargetContext} which doesn't
* implement the {@link ActionConstructionContext} interface.
*/
@Override
public ActionKeyContext getActionKeyContext() {
return super.getActionKeyContext();
}
/**
* An opaque symbol generator to be used when identifying objects by their action owner/index of
* creation. Only needed if an object needs to know whether it was created by the same action
* owner in the same order as another object. Each symbol must call {@link
* SymbolGenerator#generate} separately to obtain a unique object.
*/
public SymbolGenerator<?> getSymbolGenerator() {
return actionOwnerSymbolGenerator;
}
/**
* Returns a configuration fragment for this this target.
*/
@Nullable
public <T extends Fragment> T getFragment(Class<T> fragment, ConfigurationTransition transition) {
return getFragment(fragment, fragment.getSimpleName(), "", transition);
}
@Nullable
protected <T extends Fragment> T getFragment(Class<T> fragment, String name,
String additionalErrorMessage, ConfigurationTransition transition) {
// TODO(bazel-team): The fragments can also be accessed directly through BuildConfiguration.
// Can we lock that down somehow?
Preconditions.checkArgument(isLegalFragment(fragment, transition),
"%s has to declare '%s' as a required fragment "
+ "in %s configuration in order to access it.%s",
getRuleClassNameForLogging(), name, FragmentCollection.getConfigurationName(transition),
additionalErrorMessage);
return getConfiguration(transition).getFragment(fragment);
}
@Nullable
public <T extends Fragment> T getFragment(Class<T> fragment) {
// No transition means target configuration.
return getFragment(fragment, NoTransition.INSTANCE);
}
@Nullable
public Fragment getSkylarkFragment(String name, ConfigurationTransition transition) {
Class<? extends Fragment> fragmentClass =
getConfiguration(transition).getSkylarkFragmentByName(name);
if (fragmentClass == null) {
return null;
}
return getFragment(fragmentClass, name,
String.format(
" Please update the '%1$sfragments' argument of the rule definition "
+ "(for example: %1$sfragments = [\"%2$s\"])",
(transition.isHostTransition()) ? "host_" : "", name),
transition);
}
public ImmutableCollection<String> getSkylarkFragmentNames(ConfigurationTransition transition) {
return getConfiguration(transition).getSkylarkFragmentNames();
}
public <T extends Fragment> boolean isLegalFragment(
Class<T> fragment, ConfigurationTransition transition) {
return universalFragments.contains(fragment)
|| fragment == PlatformConfiguration.class
|| configurationFragmentPolicy.isLegalConfigurationFragment(fragment, transition);
}
public <T extends Fragment> boolean isLegalFragment(Class<T> fragment) {
// No transition means target configuration.
return isLegalFragment(fragment, NoTransition.INSTANCE);
}
private BuildConfiguration getConfiguration(ConfigurationTransition transition) {
return transition.isHostTransition() ? hostConfiguration : getConfiguration();
}
@Override
public ArtifactOwner getOwner() {
return getAnalysisEnvironment().getOwner();
}
public ImmutableList<Artifact> getBuildInfo(BuildInfoKey key) throws InterruptedException {
return getAnalysisEnvironment()
.getBuildInfo(
AnalysisUtils.isStampingEnabled(this, getConfiguration()), key, getConfiguration());
}
@VisibleForTesting
public static ActionOwner createActionOwner(
Rule rule,
ImmutableList<AspectDescriptor> aspectDescriptors,
BuildConfiguration configuration,
@Nullable PlatformInfo executionPlatform) {
return ActionOwner.create(
rule.getLabel(),
aspectDescriptors,
rule.getLocation(),
configuration.getMnemonic(),
rule.getTargetKind(),
configuration.checksum(),
configuration.toBuildEvent(),
configuration.isHostConfiguration() ? HOST_CONFIGURATION_PROGRESS_TAG : null,
executionPlatform);
}
@Override
public void registerAction(ActionAnalysisMetadata... action) {
getAnalysisEnvironment().registerAction(action);
}
/**
* Convenience function for subclasses to report non-attribute-specific
* errors in the current rule.
*/
@Override
public void ruleError(String message) {
reporter.ruleError(message);
}
/**
* Convenience function for subclasses to report non-attribute-specific
* warnings in the current rule.
*/
@Override
public void ruleWarning(String message) {
reporter.ruleWarning(message);
}
/**
* Convenience function for subclasses to report attribute-specific errors in
* the current rule.
*
* <p>If the name of the attribute starts with <code>$</code>
* it is replaced with a string <code>(an implicit dependency)</code>.
*/
@Override
public void attributeError(String attrName, String message) {
reporter.attributeError(attrName, message);
}
/**
* Like attributeError, but does not mark the configured target as errored.
*
* <p>If the name of the attribute starts with <code>$</code>
* it is replaced with a string <code>(an implicit dependency)</code>.
*/
@Override
public void attributeWarning(String attrName, String message) {
reporter.attributeWarning(attrName, message);
}
/**
* Returns an artifact beneath the root of either the "bin" or "genfiles"
* tree, whose path is based on the name of this target and the current
* configuration. The choice of which tree to use is based on the rule with
* which this target (which must be an OutputFile or a Rule) is associated.
*/
public Artifact createOutputArtifact() {
Target target = getTarget();
PathFragment rootRelativePath = getPackageDirectory()
.getRelative(PathFragment.create(target.getName()));
return internalCreateOutputArtifact(rootRelativePath, target, OutputFile.Kind.FILE);
}
/**
* Returns an artifact beneath the root of either the "bin" or "genfiles"
* tree, whose path is based on the name of this target and the current
* configuration, with a script suffix appropriate for the current host platform. ({@code .cmd}
* for Windows, otherwise {@code .sh}). The choice of which tree to use is based on the rule with
* which this target (which must be an OutputFile or a Rule) is associated.
*/
public Artifact createOutputArtifactScript() {
Target target = getTarget();
// TODO(laszlocsomor): Use the execution platform, not the host platform.
boolean isExecutedOnWindows = OS.getCurrent() == OS.WINDOWS;
String fileExtension = isExecutedOnWindows ? ".cmd" : ".sh";
PathFragment rootRelativePath = getPackageDirectory()
.getRelative(PathFragment.create(target.getName() + fileExtension));
return internalCreateOutputArtifact(rootRelativePath, target, OutputFile.Kind.FILE);
}
/**
* Returns the output artifact of an {@link OutputFile} of this target.
*
* @see #createOutputArtifact()
*/
public Artifact createOutputArtifact(OutputFile out) {
PathFragment packageRelativePath = getPackageDirectory()
.getRelative(PathFragment.create(out.getName()));
return internalCreateOutputArtifact(packageRelativePath, out, out.getKind());
}
/**
* Implementation for {@link #createOutputArtifact()} and
* {@link #createOutputArtifact(OutputFile)}. This is private so that
* {@link #createOutputArtifact(OutputFile)} can have a more specific
* signature.
*/
private Artifact internalCreateOutputArtifact(PathFragment rootRelativePath,
Target target, OutputFile.Kind outputFileKind) {
Preconditions.checkState(
target.getLabel().getPackageIdentifier().equals(getLabel().getPackageIdentifier()),
"Creating output artifact for target '%s' in different package than the rule '%s' "
+ "being analyzed", target.getLabel(), getLabel());
ArtifactRoot root = getBinOrGenfilesDirectory();
switch (outputFileKind) {
case FILE:
return getDerivedArtifact(rootRelativePath, root);
case FILESET:
return getAnalysisEnvironment().getFilesetArtifact(rootRelativePath, root);
default:
throw new IllegalStateException();
}
}
/**
* Returns the root of either the "bin" or "genfiles" tree, based on this target and the current
* configuration. The choice of which tree to use is based on the rule with which this target
* (which must be an OutputFile or a Rule) is associated.
*/
public ArtifactRoot getBinOrGenfilesDirectory() {
return rule.hasBinaryOutput()
? getConfiguration().getBinDirectory(rule.getRepository())
: getConfiguration().getGenfilesDirectory(rule.getRepository());
}
/**
* Creates an artifact in a directory that is unique to the package that contains the rule, thus
* guaranteeing that it never clashes with artifacts created by rules in other packages.
*/
public Artifact getPackageRelativeArtifact(String relative, ArtifactRoot root) {
return getPackageRelativeArtifact(PathFragment.create(relative), root);
}
/**
* Creates an artifact in a directory that is unique to the package that contains the rule, thus
* guaranteeing that it never clashes with artifacts created by rules in other packages.
*/
public Artifact getPackageRelativeTreeArtifact(String relative, ArtifactRoot root) {
return getPackageRelativeTreeArtifact(PathFragment.create(relative), root);
}
/**
* Creates an artifact in a directory that is unique to the package that contains the rule, thus
* guaranteeing that it never clashes with artifacts created by rules in other packages.
*/
public Artifact getBinArtifact(String relative) {
return getBinArtifact(PathFragment.create(relative));
}
public Artifact getBinArtifact(PathFragment relative) {
return getPackageRelativeArtifact(
relative, getConfiguration().getBinDirectory(rule.getRepository()));
}
/**
* Creates an artifact in a directory that is unique to the package that contains the rule, thus
* guaranteeing that it never clashes with artifacts created by rules in other packages.
*/
public Artifact getGenfilesArtifact(String relative) {
return getGenfilesArtifact(PathFragment.create(relative));
}
public Artifact getGenfilesArtifact(PathFragment relative) {
return getPackageRelativeArtifact(
relative, getConfiguration().getGenfilesDirectory(rule.getRepository()));
}
@Override
public Artifact getShareableArtifact(PathFragment rootRelativePath, ArtifactRoot root) {
return getAnalysisEnvironment().getDerivedArtifact(rootRelativePath, root);
}
@Override
public Artifact getPackageRelativeArtifact(PathFragment relative, ArtifactRoot root) {
return getDerivedArtifact(getPackageDirectory().getRelative(relative), root);
}
@Override
public PathFragment getPackageDirectory() {
return getLabel().getPackageIdentifier().getSourceRoot();
}
/**
* Creates an artifact under a given root with the given root-relative path.
*
* <p>Verifies that it is in the root-relative directory corresponding to the package of the rule,
* thus ensuring that it doesn't clash with other artifacts generated by other rules using this
* method.
*/
@Override
public Artifact getDerivedArtifact(PathFragment rootRelativePath, ArtifactRoot root) {
Preconditions.checkState(rootRelativePath.startsWith(getPackageDirectory()),
"Output artifact '%s' not under package directory '%s' for target '%s'",
rootRelativePath, getPackageDirectory(), getLabel());
return getAnalysisEnvironment().getDerivedArtifact(rootRelativePath, root);
}
@Override
public SpecialArtifact getTreeArtifact(PathFragment rootRelativePath, ArtifactRoot root) {
Preconditions.checkState(rootRelativePath.startsWith(getPackageDirectory()),
"Output artifact '%s' not under package directory '%s' for target '%s'",
rootRelativePath, getPackageDirectory(), getLabel());
return getAnalysisEnvironment().getTreeArtifact(rootRelativePath, root);
}
/**
* Creates a tree artifact in a directory that is unique to the package that contains the rule,
* thus guaranteeing that it never clashes with artifacts created by rules in other packages.
*/
public Artifact getPackageRelativeTreeArtifact(PathFragment relative, ArtifactRoot root) {
return getTreeArtifact(getPackageDirectory().getRelative(relative), root);
}
/**
* Creates an artifact in a directory that is unique to the rule, thus guaranteeing that it never
* clashes with artifacts created by other rules.
*/
public Artifact getUniqueDirectoryArtifact(
String uniqueDirectory, String relative, ArtifactRoot root) {
return getUniqueDirectoryArtifact(uniqueDirectory, PathFragment.create(relative), root);
}
@Override
public Artifact getUniqueDirectoryArtifact(String uniqueDirectorySuffix, String relative) {
return getUniqueDirectoryArtifact(uniqueDirectorySuffix, relative, getBinOrGenfilesDirectory());
}
@Override
public Artifact getUniqueDirectoryArtifact(String uniqueDirectorySuffix, PathFragment relative) {
return getUniqueDirectoryArtifact(uniqueDirectorySuffix, relative, getBinOrGenfilesDirectory());
}
@Override
public Artifact getUniqueDirectoryArtifact(
String uniqueDirectory, PathFragment relative, ArtifactRoot root) {
return getDerivedArtifact(getUniqueDirectory(uniqueDirectory).getRelative(relative), root);
}
/**
* Returns true iff the rule, or any attached aspect, has an attribute with the given name and
* type.
*/
public boolean isAttrDefined(String attrName, Type<?> type) {
return attributes().has(attrName, type);
}
/**
* Returns the dependencies through a {@code LABEL_DICT_UNARY} attribute as a map from
* a string to a {@link TransitiveInfoCollection}.
*/
public Map<String, TransitiveInfoCollection> getPrerequisiteMap(String attributeName) {
Preconditions.checkState(attributes().has(attributeName, BuildType.LABEL_DICT_UNARY));
ImmutableMap.Builder<String, TransitiveInfoCollection> result = ImmutableMap.builder();
Map<String, Label> dict = attributes().get(attributeName, BuildType.LABEL_DICT_UNARY);
Map<Label, ConfiguredTarget> labelToDep = new HashMap<>();
for (ConfiguredTargetAndData dep : targetMap.get(attributeName)) {
labelToDep.put(dep.getTarget().getLabel(), dep.getConfiguredTarget());
}
for (Map.Entry<String, Label> entry : dict.entrySet()) {
result.put(entry.getKey(), Preconditions.checkNotNull(labelToDep.get(entry.getValue())));
}
return result.build();
}
/**
* Returns the prerequisites keyed by the CPU of their configurations. If the split transition
* is not active (e.g. split() returned an empty list), the key is an empty Optional.
*/
public Map<Optional<String>, ? extends List<? extends TransitiveInfoCollection>>
getSplitPrerequisites(String attributeName) {
return Maps.transformValues(
getSplitPrerequisiteConfiguredTargetAndTargets(attributeName),
(ctatList) -> Lists.transform(ctatList, ConfiguredTargetAndData::getConfiguredTarget));
}
/**
* Returns the list of ConfiguredTargetsAndTargets that feed into the target through the specified
* attribute. Note that you need to specify the correct mode for the attribute otherwise an
* exception will be raised.
*/
public List<ConfiguredTargetAndData> getPrerequisiteConfiguredTargetAndTargets(
String attributeName, Mode mode) {
Attribute attributeDefinition = attributes().getAttributeDefinition(attributeName);
if ((mode == Mode.TARGET) && (attributeDefinition.getTransitionFactory().isSplit())) {
// TODO(bazel-team): If you request a split-configured attribute in the target configuration,
// we return only the list of configured targets for the first architecture; this is for
// backwards compatibility with existing code in cases where the call to getPrerequisites is
// deeply nested and we can't easily inject the behavior we want. However, we should fix all
// such call sites.
checkAttribute(attributeName, Mode.SPLIT);
Map<Optional<String>, List<ConfiguredTargetAndData>> map =
getSplitPrerequisiteConfiguredTargetAndTargets(attributeName);
return map.isEmpty() ? ImmutableList.of() : map.entrySet().iterator().next().getValue();
}
checkAttribute(attributeName, mode);
return getConfiguredTargetAndTargetDeps(attributeName);
}
/**
* Returns the prerequisites keyed by the CPU of their configurations. If the split transition is
* not active (e.g. split() returned an empty list), the key is an empty Optional.
*/
public Map<Optional<String>, List<ConfiguredTargetAndData>>
getSplitPrerequisiteConfiguredTargetAndTargets(String attributeName) {
checkAttribute(attributeName, Mode.SPLIT);
Attribute attributeDefinition = attributes().getAttributeDefinition(attributeName);
Preconditions.checkState(attributeDefinition.getTransitionFactory().isSplit());
SplitTransition transition =
(SplitTransition)
attributeDefinition
.getTransitionFactory()
.create(
AttributeTransitionData.create(
ConfiguredAttributeMapper.of(rule, configConditions)));
BuildOptions fromOptions = getConfiguration().getOptions();
List<BuildOptions> splitOptions = transition.split(fromOptions);
List<ConfiguredTargetAndData> deps = getConfiguredTargetAndTargetDeps(attributeName);
if (SplitTransition.equals(fromOptions, splitOptions)) {
// The split transition is not active. Defer the decision on which CPU to use.
return ImmutableMap.of(Optional.<String>absent(), deps);
}
Set<String> cpus = new HashSet<>();
for (BuildOptions options : splitOptions) {
// This method should only be called when the split config is enabled on the command line, in
// which case this cpu can't be null.
cpus.add(options.get(BuildConfiguration.Options.class).cpu);
}
// Use an ImmutableListMultimap.Builder here to preserve ordering.
ImmutableListMultimap.Builder<Optional<String>, ConfiguredTargetAndData> result =
ImmutableListMultimap.builder();
for (ConfiguredTargetAndData t : deps) {
if (t.getConfiguration() != null) {
result.put(Optional.of(t.getConfiguration().getCpu()), t);
} else {
// Source files don't have a configuration, so we add them to all architecture entries.
for (String cpu : cpus) {
result.put(Optional.of(cpu), t);
}
}
}
return Multimaps.asMap(result.build());
}
/**
* Returns the specified provider of the prerequisite referenced by the attribute in the
* argument. Note that you need to specify the correct mode for the attribute, otherwise an
* assertion will be raised. If the attribute is empty or it does not support the specified
* provider, returns null.
*/
public <C extends TransitiveInfoProvider> C getPrerequisite(
String attributeName, Mode mode, Class<C> provider) {
TransitiveInfoCollection prerequisite = getPrerequisite(attributeName, mode);
return prerequisite == null ? null : prerequisite.getProvider(provider);
}
/**
* Returns the transitive info collection that feeds into this target through the specified
* attribute. Note that you need to specify the correct mode for the attribute, otherwise an
* assertion will be raised. Returns null if the attribute is empty.
*/
public TransitiveInfoCollection getPrerequisite(String attributeName, Mode mode) {
ConfiguredTargetAndData result = getPrerequisiteConfiguredTargetAndData(attributeName, mode);
return result == null ? null : result.getConfiguredTarget();
}
/**
* Returns the {@link ConfiguredTargetAndData} that feeds ino this target through the specified
* attribute. Note that you need to specify the correct mode for the attribute, otherwise an
* assertion will be raised. Returns null if the attribute is empty.
*/
public ConfiguredTargetAndData getPrerequisiteConfiguredTargetAndData(
String attributeName, Mode mode) {
checkAttribute(attributeName, mode);
List<ConfiguredTargetAndData> elements = getConfiguredTargetAndTargetDeps(attributeName);
if (elements.size() > 1) {
throw new IllegalStateException(getRuleClassNameForLogging() + " attribute " + attributeName
+ " produces more than one prerequisite");
}
return elements.isEmpty() ? null : elements.get(0);
}
/**
* For a given attribute, returns all the ConfiguredTargetAndTargets of that attribute. Each
* ConfiguredTargetAndData is keyed by the {@link BuildConfiguration} that created it.
*/
public ImmutableListMultimap<BuildConfiguration, ConfiguredTargetAndData>
getPrerequisiteCofiguredTargetAndTargetsByConfiguration(String attributeName, Mode mode) {
List<ConfiguredTargetAndData> ctatCollection =
getPrerequisiteConfiguredTargetAndTargets(attributeName, mode);
ImmutableListMultimap.Builder<BuildConfiguration, ConfiguredTargetAndData> result =
ImmutableListMultimap.builder();
for (ConfiguredTargetAndData ctad : ctatCollection) {
result.put(ctad.getConfiguration(), ctad);
}
return result.build();
}
/**
* For a given attribute, returns all declared provider provided by targets of that attribute.
* Each declared provider is keyed by the {@link BuildConfiguration} under which the provider was
* created.
*
* @deprecated use {@link #getPrerequisitesByConfiguration(String, Mode, BuiltinProvider)}
* instead
*/
@Deprecated
public <C extends Info>
ImmutableListMultimap<BuildConfiguration, C> getPrerequisitesByConfiguration(
String attributeName, Mode mode, final NativeProvider<C> provider) {
ImmutableListMultimap.Builder<BuildConfiguration, C> result =
ImmutableListMultimap.builder();
for (ConfiguredTargetAndData prerequisite :
getPrerequisiteConfiguredTargetAndTargets(attributeName, mode)) {
C prerequisiteProvider = prerequisite.getConfiguredTarget().get(provider);
if (prerequisiteProvider != null) {
result.put(prerequisite.getConfiguration(), prerequisiteProvider);
}
}
return result.build();
}
/**
* For a given attribute, returns all declared provider provided by targets of that attribute.
* Each declared provider is keyed by the {@link BuildConfiguration} under which the provider was
* created.
*/
public <C extends Info>
ImmutableListMultimap<BuildConfiguration, C> getPrerequisitesByConfiguration(
String attributeName, Mode mode, final BuiltinProvider<C> provider) {
ImmutableListMultimap.Builder<BuildConfiguration, C> result =
ImmutableListMultimap.builder();
for (ConfiguredTargetAndData prerequisite :
getPrerequisiteConfiguredTargetAndTargets(attributeName, mode)) {
C prerequisiteProvider = prerequisite.getConfiguredTarget().get(provider);
if (prerequisiteProvider != null) {
result.put(prerequisite.getConfiguration(), prerequisiteProvider);
}
}
return result.build();
}
/**
* For a given attribute, returns all {@link TransitiveInfoCollection}s provided by targets
* of that attribute. Each {@link TransitiveInfoCollection} is keyed by the
* {@link BuildConfiguration} under which the collection was created.
*/
public ImmutableListMultimap<BuildConfiguration, TransitiveInfoCollection>
getPrerequisitesByConfiguration(String attributeName, Mode mode) {
ImmutableListMultimap.Builder<BuildConfiguration, TransitiveInfoCollection> result =
ImmutableListMultimap.builder();
for (ConfiguredTargetAndData prerequisite :
getPrerequisiteConfiguredTargetAndTargets(attributeName, mode)) {
result.put(prerequisite.getConfiguration(), prerequisite.getConfiguredTarget());
}
return result.build();
}
/**
* Returns the list of transitive info collections that feed into this target through the
* specified attribute. Note that you need to specify the correct mode for the attribute,
* otherwise an assertion will be raised.
*/
public List<? extends TransitiveInfoCollection> getPrerequisites(String attributeName,
Mode mode) {
return Lists.transform(
getPrerequisiteConfiguredTargetAndTargets(attributeName, mode),
ConfiguredTargetAndData::getConfiguredTarget);
}
/**
* Returns all the providers of the specified type that are listed under the specified attribute
* of this target in the BUILD file.
*/
public <C extends TransitiveInfoProvider> Iterable<C> getPrerequisites(String attributeName,
Mode mode, final Class<C> classType) {
AnalysisUtils.checkProvider(classType);
return AnalysisUtils.getProviders(getPrerequisites(attributeName, mode), classType);
}
/**
* Returns all the declared providers (native and Skylark) for the specified constructor under the
* specified attribute of this target in the BUILD file.
*/
public <T extends InfoInterface> Iterable<T> getPrerequisites(
String attributeName, Mode mode, final NativeProvider<T> skylarkKey) {
return AnalysisUtils.getProviders(getPrerequisites(attributeName, mode), skylarkKey);
}
/**
* Returns all the declared providers (native and Skylark) for the specified constructor under the
* specified attribute of this target in the BUILD file.
*/
public <T extends InfoInterface> Iterable<T> getPrerequisites(
String attributeName, Mode mode, final BuiltinProvider<T> skylarkKey) {
return AnalysisUtils.getProviders(getPrerequisites(attributeName, mode), skylarkKey);
}
/**
* Returns the declared provider (native and Skylark) for the specified constructor under the
* specified attribute of this target in the BUILD file. May return null if there is no
* TransitiveInfoCollection under the specified attribute.
*/
@Nullable
public <T extends InfoInterface> T getPrerequisite(
String attributeName, Mode mode, final NativeProvider<T> skylarkKey) {
TransitiveInfoCollection prerequisite = getPrerequisite(attributeName, mode);
return prerequisite == null ? null : prerequisite.get(skylarkKey);
}
/**
* Returns the declared provider (native and Skylark) for the specified constructor under the
* specified attribute of this target in the BUILD file. May return null if there is no
* TransitiveInfoCollection under the specified attribute.
*/
@Nullable
public <T extends InfoInterface> T getPrerequisite(
String attributeName, Mode mode, final BuiltinProvider<T> skylarkKey) {
TransitiveInfoCollection prerequisite = getPrerequisite(attributeName, mode);
return prerequisite == null ? null : prerequisite.get(skylarkKey);
}
/**
* Returns all the providers of the specified type that are listed under the specified attribute
* of this target in the BUILD file, and that contain the specified provider.
*/
public <C extends TransitiveInfoProvider> Iterable<? extends TransitiveInfoCollection>
getPrerequisitesIf(String attributeName, Mode mode, final Class<C> classType) {
AnalysisUtils.checkProvider(classType);
return AnalysisUtils.filterByProvider(getPrerequisites(attributeName, mode), classType);
}
/**
* Returns all the providers of the specified type that are listed under the specified attribute
* of this target in the BUILD file, and that contain the specified provider.
*/
public <C extends Info> Iterable<? extends TransitiveInfoCollection> getPrerequisitesIf(
String attributeName, Mode mode, final NativeProvider<C> classType) {
return AnalysisUtils.filterByProvider(getPrerequisites(attributeName, mode), classType);
}
/**
* Returns the prerequisite referred to by the specified attribute. Also checks whether
* the attribute is marked as executable and that the target referred to can actually be
* executed.
*
* <p>The {@code mode} argument must match the configuration transition specified in the
* definition of the attribute.
*
* @param attributeName the name of the attribute
* @param mode the configuration transition of the attribute
*
* @return the {@link FilesToRunProvider} interface of the prerequisite.
*/
@Nullable
public FilesToRunProvider getExecutablePrerequisite(String attributeName, Mode mode) {
Attribute ruleDefinition = attributes().getAttributeDefinition(attributeName);
if (ruleDefinition == null) {
throw new IllegalStateException(getRuleClassNameForLogging() + " attribute " + attributeName
+ " is not defined");
}
if (!ruleDefinition.isExecutable()) {
throw new IllegalStateException(getRuleClassNameForLogging() + " attribute " + attributeName
+ " is not configured to be executable");
}
TransitiveInfoCollection prerequisite = getPrerequisite(attributeName, mode);
if (prerequisite == null) {
return null;
}
FilesToRunProvider result = prerequisite.getProvider(FilesToRunProvider.class);
if (result == null || result.getExecutable() == null) {
attributeError(
attributeName, prerequisite.getLabel() + " does not refer to a valid executable target");
}
return result;
}
public void initConfigurationMakeVariableContext(
Iterable<? extends MakeVariableSupplier> makeVariableSuppliers) {
Preconditions.checkState(configurationMakeVariableContext == null);
configurationMakeVariableContext =
new ConfigurationMakeVariableContext(
this, getRule().getPackage(), getConfiguration(), makeVariableSuppliers);
}
public void initConfigurationMakeVariableContext(MakeVariableSupplier... makeVariableSuppliers) {
initConfigurationMakeVariableContext(ImmutableList.copyOf(makeVariableSuppliers));
}
public Expander getExpander(TemplateContext templateContext) {
return new Expander(this, templateContext);
}
public Expander getExpander() {
return new Expander(this, getConfigurationMakeVariableContext());
}
/**
* Returns a cached context that maps Make variable names (string) to values (string) without any
* extra {@link MakeVariableSupplier}.
*/
public ConfigurationMakeVariableContext getConfigurationMakeVariableContext() {
if (configurationMakeVariableContext == null) {
initConfigurationMakeVariableContext(ImmutableList.<MakeVariableSupplier>of());
}
return configurationMakeVariableContext;
}
@Nullable
public ToolchainContext getToolchainContext() {
return toolchainContext;
}
public ConstraintSemantics getConstraintSemantics() {
return constraintSemantics;
}
@Override
@Nullable
public PlatformInfo getExecutionPlatform() {
if (getToolchainContext() == null) {
return null;
}
return getToolchainContext().executionPlatform();
}
private void checkAttribute(String attributeName, Mode mode) {
Attribute attributeDefinition = attributes.getAttributeDefinition(attributeName);
if (attributeDefinition == null) {
throw new IllegalStateException(getRule().getLocation() + ": " + getRuleClassNameForLogging()
+ " attribute " + attributeName + " is not defined");
}
if (attributeDefinition.getType().getLabelClass() != LabelClass.DEPENDENCY) {
throw new IllegalStateException(getRuleClassNameForLogging() + " attribute " + attributeName
+ " is not a label type attribute");
}
TransitionFactory<AttributeTransitionData> transitionFactory =
attributeDefinition.getTransitionFactory();
if (mode == Mode.HOST) {
if (transitionFactory.isSplit()) {
throw new IllegalStateException(getRule().getLocation() + ": "
+ getRuleClassNameForLogging() + " attribute " + attributeName
+ " is not configured for the host configuration");
}
} else if (mode == Mode.TARGET) {
if (transitionFactory.isSplit() && !NoTransition.isInstance(transitionFactory)) {
throw new IllegalStateException(getRule().getLocation() + ": "
+ getRuleClassNameForLogging() + " attribute " + attributeName
+ " is not configured for the target configuration");
}
} else if (mode == Mode.DATA) {
throw new IllegalStateException(getRule().getLocation() + ": "
+ getRuleClassNameForLogging() + " attribute " + attributeName
+ ": DATA transition no longer supported"); // See b/80157700.
} else if (mode == Mode.SPLIT) {
if (!(attributeDefinition.getTransitionFactory().isSplit())) {
throw new IllegalStateException(getRule().getLocation() + ": "
+ getRuleClassNameForLogging() + " attribute " + attributeName
+ " is not configured for a split transition");
}
}
}
/**
* For the specified attribute "attributeName" (which must be of type
* list(label)), resolve all the labels into ConfiguredTargets (for the
* configuration appropriate to the attribute) and return their build
* artifacts as a {@link PrerequisiteArtifacts} instance.
*
* @param attributeName the name of the attribute to traverse
*/
public PrerequisiteArtifacts getPrerequisiteArtifacts(String attributeName, Mode mode) {
return PrerequisiteArtifacts.get(this, attributeName, mode);
}
/**
* For the specified attribute "attributeName" (which must be of type label),
* resolves the ConfiguredTarget and returns its single build artifact.
*
* <p>If the attribute is optional, has no default and was not specified, then
* null will be returned. Note also that null is returned (and an attribute
* error is raised) if there wasn't exactly one build artifact for the target.
*/
public Artifact getPrerequisiteArtifact(String attributeName, Mode mode) {
TransitiveInfoCollection target = getPrerequisite(attributeName, mode);
return transitiveInfoCollectionToArtifact(attributeName, target);
}
/**
* Equivalent to getPrerequisiteArtifact(), but also asserts that
* host-configuration is appropriate for the specified attribute.
*/
public Artifact getHostPrerequisiteArtifact(String attributeName) {
TransitiveInfoCollection target = getPrerequisite(attributeName, Mode.HOST);
return transitiveInfoCollectionToArtifact(attributeName, target);
}
private Artifact transitiveInfoCollectionToArtifact(
String attributeName, TransitiveInfoCollection target) {
if (target != null) {
Iterable<Artifact> artifacts = target.getProvider(FileProvider.class).getFilesToBuild();
if (Iterables.size(artifacts) == 1) {
return Iterables.getOnlyElement(artifacts);
} else {
attributeError(attributeName, target.getLabel() + " expected a single artifact");
}
}
return null;
}
/**
* Returns the sole file in the "srcs" attribute. Reports an error and
* (possibly) returns null if "srcs" does not identify a single file of the
* expected type.
*/
public Artifact getSingleSource(String fileTypeName) {
List<Artifact> srcs = PrerequisiteArtifacts.get(this, "srcs", Mode.TARGET).list();
switch (srcs.size()) {
case 0 : // error already issued by getSrc()
return null;
case 1 : // ok
return Iterables.getOnlyElement(srcs);
default :
attributeError("srcs", "only a single " + fileTypeName + " is allowed here");
return srcs.get(0);
}
}
public Artifact getSingleSource() {
return getSingleSource(getRuleClassNameForLogging() + " source file");
}
/**
* Returns a path fragment qualified by the rule name and unique fragment to
* disambiguate artifacts produced from the source file appearing in
* multiple rules.
*
* <p>For example "pkg/dir/name" -> "pkg/&lt;fragment>/rule/dir/name.
*/
public final PathFragment getUniqueDirectory(String fragment) {
return getUniqueDirectory(PathFragment.create(fragment));
}
/**
* Returns a path fragment qualified by the rule name and unique fragment to
* disambiguate artifacts produced from the source file appearing in
* multiple rules.
*
* <p>For example "pkg/dir/name" -> "pkg/&lt;fragment>/rule/dir/name.
*/
public final PathFragment getUniqueDirectory(PathFragment fragment) {
return AnalysisUtils.getUniqueDirectory(getLabel(), fragment);
}
/**
* Check that all targets that were specified as sources are from the same
* package as this rule. Output a warning or an error for every target that is
* imported from a different package.
*/
public void checkSrcsSamePackage(boolean onlyWarn) {
PathFragment packageName = getLabel().getPackageFragment();
for (Artifact srcItem : PrerequisiteArtifacts.get(this, "srcs", Mode.TARGET).list()) {
if (!srcItem.isSourceArtifact()) {
// In theory, we should not do this check. However, in practice, we
// have a couple of rules that do not obey the "srcs must contain
// files and only files" rule. Thus, we are stuck with this hack here :(
continue;
}
Label associatedLabel = srcItem.getOwner();
PathFragment itemPackageName = associatedLabel.getPackageFragment();
if (!itemPackageName.equals(packageName)) {
String message = "please do not import '" + associatedLabel + "' directly. "
+ "You should either move the file to this package or depend on "
+ "an appropriate rule there";
if (onlyWarn) {
attributeWarning("srcs", message);
} else {
attributeError("srcs", message);
}
}
}
}
/**
* Returns the label to which the {@code NODEP_LABEL} attribute
* {@code attrName} refers, checking that it is a valid label, and that it is
* referring to a local target. Reports a warning otherwise.
*/
public Label getLocalNodepLabelAttribute(String attrName) {
Label label = attributes().get(attrName, BuildType.NODEP_LABEL);
if (label == null) {
return null;
}
if (!getTarget().getLabel().getPackageFragment().equals(label.getPackageFragment())) {
attributeWarning(attrName, "does not reference a local rule");
}
return label;
}
@Override
public Artifact getImplicitOutputArtifact(ImplicitOutputsFunction function)
throws InterruptedException {
Iterable<String> result;
try {
result =
function.getImplicitOutputs(
getAnalysisEnvironment().getEventHandler(), RawAttributeMapper.of(rule));
} catch (EvalException e) {
// It's ok as long as we don't use this method from Skylark.
throw new IllegalStateException(e);
}
return getImplicitOutputArtifact(Iterables.getOnlyElement(result));
}
/**
* Only use from Skylark. Returns the implicit output artifact for a given output path.
*/
public Artifact getImplicitOutputArtifact(String path) {
return getPackageRelativeArtifact(path, getBinOrGenfilesDirectory());
}
/**
* Convenience method to return a host configured target for the "compiler"
* attribute. Allows caller to decide whether a warning should be printed if
* the "compiler" attribute is not set to the default value.
*
* @param warnIfNotDefault if true, print a warning if the value for the
* "compiler" attribute is set to something other than the default
* @return a ConfiguredTarget using the host configuration for the "compiler"
* attribute
*/
public final FilesToRunProvider getCompiler(boolean warnIfNotDefault) {
Label label = attributes().get("compiler", BuildType.LABEL);
if (warnIfNotDefault && !label.equals(getRule().getAttrDefaultValue("compiler"))) {
attributeWarning("compiler", "setting the compiler is strongly discouraged");
}
return getExecutablePrerequisite("compiler", Mode.HOST);
}
/**
* Returns the (unmodifiable, ordered) list of artifacts which are the outputs
* of this target.
*
* <p>Each element in this list is associated with a single output, either
* declared implicitly (via setImplicitOutputsFunction()) or explicitly
* (listed in the 'outs' attribute of our rule).
*/
public final ImmutableList<Artifact> getOutputArtifacts() {
ImmutableList.Builder<Artifact> artifacts = ImmutableList.builder();
for (OutputFile out : getRule().getOutputFiles()) {
artifacts.add(createOutputArtifact(out));
}
return artifacts.build();
}
/**
* Like {@link #getOutputArtifacts()} but for a singular output item.
* Reports an error if the "out" attribute is not a singleton.
*
* @return null if the output list is empty, the artifact for the first item
* of the output list otherwise
*/
public Artifact getOutputArtifact() {
List<Artifact> outs = getOutputArtifacts();
if (outs.size() != 1) {
attributeError("out", "exactly one output file required");
if (outs.isEmpty()) {
return null;
}
}
return outs.get(0);
}
@Override
public final Artifact getRelatedArtifact(PathFragment pathFragment, String extension) {
PathFragment file = FileSystemUtils.replaceExtension(pathFragment, extension);
return getDerivedArtifact(file, getConfiguration().getBinDirectory(rule.getRepository()));
}
/**
* Returns true if the target for this context is a test target.
*/
public boolean isTestTarget() {
return TargetUtils.isTestRule(getTarget());
}
/** Returns true if the testonly attribute is set on this context. */
public boolean isTestOnlyTarget() {
return attributes().has("testonly", Type.BOOLEAN) && attributes().get("testonly", Type.BOOLEAN);
}
/**
* @return true if {@code rule} is visible from {@code prerequisite}.
*
* <p>This only computes the logic as implemented by the visibility system. The final decision
* whether a dependency is allowed is made by
* {@link ConfiguredRuleClassProvider.PrerequisiteValidator}.
*/
public static boolean isVisible(Rule rule, TransitiveInfoCollection prerequisite) {
// Check visibility attribute
for (PackageGroupContents specification :
prerequisite.getProvider(VisibilityProvider.class).getVisibility()) {
if (specification.containsPackage(rule.getLabel().getPackageIdentifier())) {
return true;
}
}
return false;
}
/**
* @return the set of features applicable for the current rule's package.
*/
public ImmutableSet<String> getFeatures() {
return enabledFeatures;
}
/** @return the set of features that are disabled for the current rule's package. */
public ImmutableSet<String> getDisabledFeatures() {
return disabledFeatures;
}
@Override
public RuleErrorConsumer getRuleErrorConsumer() {
return this;
}
@Override
public String toString() {
return "RuleContext(" + getLabel() + ", " + getConfiguration() + ")";
}
/**
* Builder class for a RuleContext.
*/
public static final class Builder implements RuleErrorConsumer {
private final AnalysisEnvironment env;
private final Target target;
private final ConfigurationFragmentPolicy configurationFragmentPolicy;
private ImmutableList<Class<? extends BuildConfiguration.Fragment>> universalFragments;
private final BuildConfiguration configuration;
private final BuildConfiguration hostConfiguration;
private final ActionLookupValue.ActionLookupKey actionOwnerSymbol;
private final PrerequisiteValidator prerequisiteValidator;
private final RuleErrorConsumer reporter;
private OrderedSetMultimap<Attribute, ConfiguredTargetAndData> prerequisiteMap;
private ImmutableMap<Label, ConfigMatchingProvider> configConditions;
private NestedSet<PackageGroupContents> visibility;
private ImmutableMap<String, Attribute> aspectAttributes;
private ImmutableList<Aspect> aspects;
private ToolchainContext toolchainContext;
private ConstraintSemantics constraintSemantics;
@VisibleForTesting
public Builder(
AnalysisEnvironment env,
Target target,
ImmutableList<Aspect> aspects,
BuildConfiguration configuration,
BuildConfiguration hostConfiguration,
PrerequisiteValidator prerequisiteValidator,
ConfigurationFragmentPolicy configurationFragmentPolicy,
ActionLookupValue.ActionLookupKey actionOwnerSymbol) {
this.env = Preconditions.checkNotNull(env);
this.target = Preconditions.checkNotNull(target);
this.aspects = aspects;
this.configurationFragmentPolicy = Preconditions.checkNotNull(configurationFragmentPolicy);
this.configuration = Preconditions.checkNotNull(configuration);
this.hostConfiguration = Preconditions.checkNotNull(hostConfiguration);
this.prerequisiteValidator = prerequisiteValidator;
this.actionOwnerSymbol = Preconditions.checkNotNull(actionOwnerSymbol);
if (configuration.allowAnalysisFailures()) {
reporter = new SuppressingErrorReporter();
} else {
reporter = new ErrorReporter(env, target.getAssociatedRule(), getRuleClassNameForLogging());
}
}
@VisibleForTesting
public RuleContext build() {
Preconditions.checkNotNull(prerequisiteMap);
Preconditions.checkNotNull(configConditions);
Preconditions.checkNotNull(visibility);
Preconditions.checkNotNull(constraintSemantics);
AttributeMap attributes =
ConfiguredAttributeMapper.of(target.getAssociatedRule(), configConditions);
validateAttributes(attributes);
ListMultimap<String, ConfiguredTargetAndData> targetMap = createTargetMap();
ListMultimap<String, ConfiguredFilesetEntry> filesetEntryMap =
createFilesetEntryMap(target.getAssociatedRule(), configConditions);
return new RuleContext(
this,
attributes,
targetMap,
filesetEntryMap,
configConditions,
universalFragments,
getRuleClassNameForLogging(),
actionOwnerSymbol,
aspectAttributes != null ? aspectAttributes : ImmutableMap.<String, Attribute>of(),
toolchainContext,
constraintSemantics);
}
private void validateAttributes(AttributeMap attributes) {
target
.getAssociatedRule()
.getRuleClassObject()
.checkAttributesNonEmpty(reporter, attributes);
}
public Builder setVisibility(NestedSet<PackageGroupContents> visibility) {
this.visibility = visibility;
return this;
}
/**
* Sets the prerequisites and checks their visibility. It also generates appropriate error or
* warning messages and sets the error flag as appropriate.
*/
public Builder setPrerequisites(
OrderedSetMultimap<Attribute, ConfiguredTargetAndData> prerequisiteMap) {
this.prerequisiteMap = Preconditions.checkNotNull(prerequisiteMap);
return this;
}
/**
* Adds attributes which are defined by an Aspect (and not by RuleClass).
*/
public Builder setAspectAttributes(Map<String, Attribute> aspectAttributes) {
this.aspectAttributes = ImmutableMap.copyOf(aspectAttributes);
return this;
}
/**
* Sets the configuration conditions needed to determine which paths to follow for this
* rule's configurable attributes.
*/
public Builder setConfigConditions(
ImmutableMap<Label, ConfigMatchingProvider> configConditions) {
this.configConditions = Preconditions.checkNotNull(configConditions);
return this;
}
/**
* Sets the fragment that can be legally accessed even when not explicitly declared.
*/
public Builder setUniversalFragments(
ImmutableList<Class<? extends BuildConfiguration.Fragment>> fragments) {
// TODO(bazel-team): Add this directly to ConfigurationFragmentPolicy, so we
// don't need separate logic specifically for checking this fragment. The challenge is
// that we need RuleClassProvider to figure out what this fragment is, and not every
// call state that creates ConfigurationFragmentPolicy has access to that.
this.universalFragments = fragments;
return this;
}
/** Sets the {@link ToolchainContext} used to access toolchains used by this rule. */
public Builder setToolchainContext(ToolchainContext toolchainContext) {
this.toolchainContext = toolchainContext;
return this;
}
public Builder setConstraintSemantics(ConstraintSemantics constraintSemantics) {
this.constraintSemantics = constraintSemantics;
return this;
}
private boolean validateFilesetEntry(FilesetEntry filesetEntry, ConfiguredTargetAndData src) {
NestedSet<Artifact> filesToBuild =
src.getConfiguredTarget().getProvider(FileProvider.class).getFilesToBuild();
if (filesToBuild.isSingleton() && Iterables.getOnlyElement(filesToBuild).isFileset()) {
return true;
}
if (filesetEntry.isSourceFileset()) {
return true;
}
Target srcTarget = src.getTarget();
if (!(srcTarget instanceof FileTarget)) {
attributeError("entries", String.format(
"Invalid 'srcdir' target '%s'. Must be another Fileset or package",
srcTarget.getLabel()));
return false;
}
if (srcTarget instanceof OutputFile) {
attributeWarning("entries", String.format("'srcdir' target '%s' is not an input file. "
+ "This forces the Fileset to be executed unconditionally",
srcTarget.getLabel()));
}
return true;
}
/**
* Determines and returns a map from attribute name to list of configured fileset entries, based
* on a PrerequisiteMap instance.
*/
private ListMultimap<String, ConfiguredFilesetEntry> createFilesetEntryMap(
final Rule rule, ImmutableMap<Label, ConfigMatchingProvider> configConditions) {
if (!target.getTargetKind().equals("Fileset rule")) {
return ImmutableSortedKeyListMultimap.<String, ConfiguredFilesetEntry>builder().build();
}
final ImmutableSortedKeyListMultimap.Builder<String, ConfiguredFilesetEntry> mapBuilder =
ImmutableSortedKeyListMultimap.builder();
for (Attribute attr : rule.getAttributes()) {
if (attr.getType() != BuildType.FILESET_ENTRY_LIST) {
continue;
}
String attributeName = attr.getName();
Map<Label, ConfiguredTargetAndData> ctMap = new HashMap<>();
for (ConfiguredTargetAndData prerequisite : prerequisiteMap.get(attr)) {
ctMap.put(
AliasProvider.getDependencyLabel(prerequisite.getConfiguredTarget()), prerequisite);
}
List<FilesetEntry> entries = ConfiguredAttributeMapper.of(rule, configConditions)
.get(attributeName, BuildType.FILESET_ENTRY_LIST);
for (FilesetEntry entry : entries) {
if (entry.getFiles() == null) {
Label label = entry.getSrcLabel();
ConfiguredTargetAndData src = ctMap.get(label);
if (!validateFilesetEntry(entry, src)) {
continue;
}
mapBuilder.put(
attributeName, new ConfiguredFilesetEntry(entry, src.getConfiguredTarget()));
} else {
ImmutableList.Builder<TransitiveInfoCollection> files = ImmutableList.builder();
for (Label file : entry.getFiles()) {
files.add(ctMap.get(file).getConfiguredTarget());
}
mapBuilder.put(attributeName, new ConfiguredFilesetEntry(entry, files.build()));
}
}
}
return mapBuilder.build();
}
/** Determines and returns a map from attribute name to list of configured targets. */
private ImmutableSortedKeyListMultimap<String, ConfiguredTargetAndData> createTargetMap() {
ImmutableSortedKeyListMultimap.Builder<String, ConfiguredTargetAndData> mapBuilder =
ImmutableSortedKeyListMultimap.builder();
for (Map.Entry<Attribute, Collection<ConfiguredTargetAndData>> entry :
prerequisiteMap.asMap().entrySet()) {
Attribute attribute = entry.getKey();
if (attribute == null) {
continue;
}
if (attribute.isSingleArtifact() && entry.getValue().size() > 1) {
attributeError(attribute.getName(), "must contain a single dependency");
continue;
}
if (attribute.isSilentRuleClassFilter()) {
Predicate<RuleClass> filter = attribute.getAllowedRuleClassesPredicate();
for (ConfiguredTargetAndData configuredTarget : entry.getValue()) {
Target prerequisiteTarget = configuredTarget.getTarget();
if ((prerequisiteTarget instanceof Rule)
&& filter.apply(((Rule) prerequisiteTarget).getRuleClassObject())) {
validateDirectPrerequisite(attribute, configuredTarget);
mapBuilder.put(attribute.getName(), configuredTarget);
}
}
} else {
for (ConfiguredTargetAndData configuredTarget : entry.getValue()) {
validateDirectPrerequisite(attribute, configuredTarget);
mapBuilder.put(attribute.getName(), configuredTarget);
}
}
}
return mapBuilder.build();
}
/**
* Post a raw event to the analysis environment's event handler. This circumvents normal
* error and warning reporting functionality to post events, and should only be used
* in rare cases where a custom event needs to be handled.
*/
public void post(Postable event) {
env.getEventHandler().post(event);
}
@Override
public void ruleError(String message) {
reporter.ruleError(message);
}
@Override
public void attributeError(String attrName, String message) {
reporter.attributeError(attrName, message);
}
@Override
public void ruleWarning(String message) {
reporter.ruleWarning(message);
}
@Override
public void attributeWarning(String attrName, String message) {
reporter.attributeWarning(attrName, message);
}
@Override
public boolean hasErrors() {
return reporter.hasErrors();
}
private String badPrerequisiteMessage(
ConfiguredTargetAndData prerequisite, String reason, boolean isWarning) {
String msgReason = reason != null ? " (" + reason + ")" : "";
if (isWarning) {
return String.format(
"%s is unexpected here%s; continuing anyway",
AliasProvider.describeTargetWithAliases(prerequisite, TargetMode.WITH_KIND),
msgReason);
}
return String.format("%s is misplaced here%s",
AliasProvider.describeTargetWithAliases(prerequisite, TargetMode.WITH_KIND), msgReason);
}
private void reportBadPrerequisite(
Attribute attribute,
ConfiguredTargetAndData prerequisite,
String reason,
boolean isWarning) {
String message = badPrerequisiteMessage(prerequisite, reason, isWarning);
if (isWarning) {
attributeWarning(attribute.getName(), message);
} else {
attributeError(attribute.getName(), message);
}
}
private void validateDirectPrerequisiteType(
ConfiguredTargetAndData prerequisite, Attribute attribute) {
Target prerequisiteTarget = prerequisite.getTarget();
Label prerequisiteLabel = prerequisiteTarget.getLabel();
if (prerequisiteTarget instanceof Rule) {
Rule prerequisiteRule = (Rule) prerequisiteTarget;
String reason =
attribute
.getValidityPredicate()
.checkValid(target.getAssociatedRule(), prerequisiteRule);
if (reason != null) {
reportBadPrerequisite(attribute, prerequisite, reason, false);
}
}
if (prerequisiteTarget instanceof Rule) {
validateRuleDependency(prerequisite, attribute);
} else if (prerequisiteTarget instanceof FileTarget) {
if (attribute.isStrictLabelCheckingEnabled()) {
if (!attribute.getAllowedFileTypesPredicate()
.apply(((FileTarget) prerequisiteTarget).getFilename())) {
if (prerequisiteTarget instanceof InputFile
&& !((InputFile) prerequisiteTarget).getPath().exists()) {
// Misplaced labels, no corresponding target exists
if (attribute.getAllowedFileTypesPredicate().isNone()
&& !((InputFile) prerequisiteTarget).getFilename().contains(".")) {
// There are no allowed files in the attribute but it's not a valid rule,
// and the filename doesn't contain a dot --> probably a misspelled rule
attributeError(attribute.getName(),
"rule '" + prerequisiteLabel + "' does not exist");
} else {
attributeError(attribute.getName(),
"target '" + prerequisiteLabel + "' does not exist");
}
} else {
// The file exists but has a bad extension
reportBadPrerequisite(attribute, prerequisite,
"expected " + attribute.getAllowedFileTypesPredicate(), false);
}
}
}
}
}
/** Returns whether the context being constructed is for the evaluation of an aspect. */
public boolean forAspect() {
return !aspects.isEmpty();
}
public Rule getRule() {
return target.getAssociatedRule();
}
/**
* Returns a rule class name suitable for log messages, including an aspect name if applicable.
*/
public String getRuleClassNameForLogging() {
if (aspects.isEmpty()) {
return target.getAssociatedRule().getRuleClass();
}
return Joiner.on(",")
.join(aspects.stream().map(a -> a.getDescriptor()).collect(Collectors.toList()))
+ " aspect on "
+ target.getAssociatedRule().getRuleClass();
}
public BuildConfiguration getConfiguration() {
return configuration;
}
/**
* @return true if {@code rule} is visible from {@code prerequisite}.
*
* <p>This only computes the logic as implemented by the visibility system. The final decision
* whether a dependency is allowed is made by
* {@link ConfiguredRuleClassProvider.PrerequisiteValidator}, who is supposed to call this
* method to determine whether a dependency is allowed as per visibility rules.
*/
public boolean isVisible(TransitiveInfoCollection prerequisite) {
return RuleContext.isVisible(target.getAssociatedRule(), prerequisite);
}
private void validateDirectPrerequisiteFileTypes(
ConfiguredTargetAndData prerequisite, Attribute attribute) {
if (attribute.isSkipAnalysisTimeFileTypeCheck()) {
return;
}
FileTypeSet allowedFileTypes = attribute.getAllowedFileTypesPredicate();
if (allowedFileTypes == null) {
// It's not a label or label_list attribute.
return;
}
if (allowedFileTypes == FileTypeSet.ANY_FILE && !attribute.isNonEmpty()
&& !attribute.isSingleArtifact()) {
return;
}
// If we allow any file we still need to check if there are actually files generated
// Note that this check only runs for ANY_FILE predicates if the attribute is NON_EMPTY
// or SINGLE_ARTIFACT
// If we performed this check when allowedFileTypes == NO_FILE this would
// always throw an error in those cases
if (allowedFileTypes != FileTypeSet.NO_FILE) {
Iterable<Artifact> artifacts =
prerequisite.getConfiguredTarget().getProvider(FileProvider.class).getFilesToBuild();
if (attribute.isSingleArtifact() && Iterables.size(artifacts) != 1) {
attributeError(
attribute.getName(),
"'" + prerequisite.getTarget().getLabel() + "' must produce a single file");
return;
}
for (Artifact sourceArtifact : artifacts) {
if (allowedFileTypes.apply(sourceArtifact.getFilename())) {
return;
}
if (sourceArtifact.isTreeArtifact()) {
return;
}
}
attributeError(
attribute.getName(),
"'"
+ prerequisite.getTarget().getLabel()
+ "' does not produce any "
+ getRuleClassNameForLogging()
+ " "
+ attribute.getName()
+ " files (expected "
+ allowedFileTypes
+ ")");
}
}
/**
* Because some rules still have to use allowedRuleClasses to do rule dependency validation. A
* dependency is valid if it is from a rule in allowedRuledClasses, OR if all of the providers
* in requiredProviders are provided by the target.
*/
private void validateRuleDependency(ConfiguredTargetAndData prerequisite, Attribute attribute) {
Set<String> unfulfilledRequirements = new LinkedHashSet<>();
if (checkRuleDependencyClass(prerequisite, attribute, unfulfilledRequirements)) {
return;
}
if (checkRuleDependencyClassWarnings(prerequisite, attribute)) {
return;
}
if (checkRuleDependencyMandatoryProviders(prerequisite, attribute, unfulfilledRequirements)) {
return;
}
// not allowed rule class and some mandatory providers missing => reject.
if (!unfulfilledRequirements.isEmpty()) {
attributeError(
attribute.getName(), StringUtil.joinEnglishList(unfulfilledRequirements, "and"));
}
}
/** Check if prerequisite should be allowed based on its rule class. */
private boolean checkRuleDependencyClass(
ConfiguredTargetAndData prerequisite,
Attribute attribute,
Set<String> unfulfilledRequirements) {
if (attribute.getAllowedRuleClassesPredicate() != Predicates.<RuleClass>alwaysTrue()) {
if (attribute
.getAllowedRuleClassesPredicate()
.apply(((Rule) prerequisite.getTarget()).getRuleClassObject())) {
// prerequisite has an allowed rule class => accept.
return true;
}
// remember that the rule class that was not allowed;
// but maybe prerequisite provides required providers? do not reject yet.
unfulfilledRequirements.add(
badPrerequisiteMessage(
prerequisite,
"expected " + attribute.getAllowedRuleClassesPredicate(),
false));
}
return false;
}
/**
* Check if prerequisite should be allowed with warning based on its rule class.
*
* <p>If yes, also issues said warning.
*/
private boolean checkRuleDependencyClassWarnings(
ConfiguredTargetAndData prerequisite, Attribute attribute) {
if (attribute
.getAllowedRuleClassesWarningPredicate()
.apply(((Rule) prerequisite.getTarget()).getRuleClassObject())) {
Predicate<RuleClass> allowedRuleClasses = attribute.getAllowedRuleClassesPredicate();
reportBadPrerequisite(
attribute,
prerequisite,
allowedRuleClasses == Predicates.<RuleClass>alwaysTrue()
? null
: "expected " + allowedRuleClasses,
true);
// prerequisite has a rule class allowed with a warning => accept, emitting a warning.
return true;
}
return false;
}
/** Check if prerequisite should be allowed based on required providers on the attribute. */
private boolean checkRuleDependencyMandatoryProviders(
ConfiguredTargetAndData prerequisite,
Attribute attribute,
Set<String> unfulfilledRequirements) {
RequiredProviders requiredProviders = attribute.getRequiredProviders();
if (requiredProviders.acceptsAny()) {
// If no required providers specified, we do not know if we should accept.
return false;
}
if (prerequisite.getConfiguredTarget().satisfies(requiredProviders)) {
return true;
}
unfulfilledRequirements.add(
String.format(
"'%s' does not have mandatory providers: %s",
prerequisite.getTarget().getLabel(),
prerequisite
.getConfiguredTarget()
.missingProviders(requiredProviders)
.getDescription()));
return false;
}
private void validateDirectPrerequisite(
Attribute attribute, ConfiguredTargetAndData prerequisite) {
validateDirectPrerequisiteType(prerequisite, attribute);
validateDirectPrerequisiteFileTypes(prerequisite, attribute);
if (attribute.performPrereqValidatorCheck()) {
prerequisiteValidator.validate(this, prerequisite, attribute);
}
}
}
/** Helper class for reporting errors and warnings. */
private static final class ErrorReporter extends EventHandlingErrorReporter
implements RuleErrorConsumer {
private final Rule rule;
ErrorReporter(AnalysisEnvironment env, Rule rule, String ruleClassNameForLogging) {
super(ruleClassNameForLogging, env);
this.rule = rule;
}
@Override
protected String getMacroMessageAppendix(String attrName) {
return rule.wasCreatedByMacro()
? String.format(
". Since this rule was created by the macro '%s', the error might have been "
+ "caused by the macro implementation in %s",
getGeneratorFunction(), rule.getAttributeLocationWithoutMacro(attrName))
: "";
}
private String getGeneratorFunction() {
return (String) rule.getAttributeContainer().getAttr("generator_function");
}
@Override
protected Label getLabel() {
return rule.getLabel();
}
@Override
protected Location getRuleLocation() {
return rule.getLocation();
}
@Override
protected Location getAttributeLocation(String attrName) {
return rule.getAttributeLocation(attrName);
}
}
/**
* Implementation of an error consumer which does not post any events, saves rule and attribute
* errors for future consumption, and drops warnings.
*/
public static final class SuppressingErrorReporter implements RuleErrorConsumer {
private final List<String> errorMessages = Lists.newArrayList();
@Override
public void ruleWarning(String message) {}
@Override
public void ruleError(String message) {
errorMessages.add(message);
}
@Override
public void attributeWarning(String attrName, String message) {}
@Override
public void attributeError(String attrName, String message) {
errorMessages.add(message);
}
@Override
public boolean hasErrors() {
return !errorMessages.isEmpty();
}
/**
* Returns the error message strings reported to this error consumer.
*/
public List<String> getErrorMessages() {
return errorMessages;
}
}
}