/*
* Copyright 2010 the original author or authors.
*
* 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 org.gradle.api.internal.tasks;
import com.google.common.base.Function;
import com.google.common.collect.ImmutableSortedSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Iterators;
import com.google.common.collect.Lists;
import groovy.lang.Closure;
import org.gradle.api.Describable;
import org.gradle.api.Task;
import org.gradle.api.file.FileCollection;
import org.gradle.api.internal.TaskExecutionHistory;
import org.gradle.api.internal.TaskInternal;
import org.gradle.api.internal.TaskOutputCachingState;
import org.gradle.api.internal.TaskOutputsInternal;
import org.gradle.api.internal.file.CompositeFileCollection;
import org.gradle.api.internal.file.FileResolver;
import org.gradle.api.internal.file.collections.FileCollectionResolveContext;
import org.gradle.api.internal.tasks.CacheableTaskOutputFilePropertySpec.OutputType;
import org.gradle.api.internal.tasks.execution.SelfDescribingSpec;
import org.gradle.api.specs.AndSpec;
import org.gradle.api.specs.Spec;
import org.gradle.api.tasks.TaskOutputFilePropertyBuilder;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.Callable;
import static org.gradle.api.internal.tasks.TaskOutputCachingDisabledReasonCategory.*;
public class DefaultTaskOutputs implements TaskOutputsInternal {
private static final TaskOutputCachingState ENABLED = DefaultTaskOutputCachingState.enabled();
public static final TaskOutputCachingState DISABLED = DefaultTaskOutputCachingState.disabled(BUILD_CACHE_DISABLED, "Task output caching is disabled");
private static final TaskOutputCachingState CACHING_NOT_ENABLED = DefaultTaskOutputCachingState.disabled(TaskOutputCachingDisabledReasonCategory.NOT_ENABLED_FOR_TASK, "Caching has not been enabled for the task");
private static final TaskOutputCachingState NO_OUTPUTS_DECLARED = DefaultTaskOutputCachingState.disabled(TaskOutputCachingDisabledReasonCategory.NO_OUTPUTS_DECLARED, "No outputs declared");
private final FileCollection allOutputFiles;
private AndSpec<TaskInternal> upToDateSpec = AndSpec.empty();
private List<SelfDescribingSpec<TaskInternal>> cacheIfSpecs = new LinkedList<SelfDescribingSpec<TaskInternal>>();
private List<SelfDescribingSpec<TaskInternal>> doNotCacheIfSpecs = new LinkedList<SelfDescribingSpec<TaskInternal>>();
private TaskExecutionHistory history;
private final List<TaskOutputPropertySpecAndBuilder> filePropertiesInternal = Lists.newArrayList();
private ImmutableSortedSet<TaskOutputFilePropertySpec> fileProperties;
private final FileResolver resolver;
private final TaskInternal task;
private final TaskMutator taskMutator;
public DefaultTaskOutputs(FileResolver resolver, final TaskInternal task, TaskMutator taskMutator) {
this.resolver = resolver;
this.task = task;
this.taskMutator = taskMutator;
this.allOutputFiles = new TaskOutputUnionFileCollection(task);
}
@Override
public Spec<? super TaskInternal> getUpToDateSpec() {
return upToDateSpec;
}
@Override
public void upToDateWhen(final Closure upToDateClosure) {
taskMutator.mutate("TaskOutputs.upToDateWhen(Closure)", new Runnable() {
public void run() {
upToDateSpec = upToDateSpec.and(upToDateClosure);
}
});
}
@Override
public void upToDateWhen(final Spec<? super Task> spec) {
taskMutator.mutate("TaskOutputs.upToDateWhen(Spec)", new Runnable() {
public void run() {
upToDateSpec = upToDateSpec.and(spec);
}
});
}
@Override
public TaskOutputCachingState getCachingState() {
if (cacheIfSpecs.isEmpty()) {
return CACHING_NOT_ENABLED;
}
if (!hasDeclaredOutputs()) {
return NO_OUTPUTS_DECLARED;
}
TaskExecutionHistory.OverlappingOutputs overlappingOutputs = getOverlapOutputs();
if (overlappingOutputs!=null) {
String relativePath = task.getProject().relativePath(overlappingOutputs.getOverlappedFilePath());
return DefaultTaskOutputCachingState.disabled(TaskOutputCachingDisabledReasonCategory.OVERLAPPING_OUTPUTS,
String.format("Gradle does not know how file '%s' was created (output property '%s'). Task output caching requires exclusive access to output paths to guarantee correctness.",
relativePath, overlappingOutputs.getPropertyName()));
}
for (TaskPropertySpec spec : getFileProperties()) {
if (spec instanceof NonCacheableTaskOutputPropertySpec) {
return DefaultTaskOutputCachingState.disabled(
PLURAL_OUTPUTS,
"Declares multiple output files for the single output property '"
+ spec.getPropertyName()
+ "' via `@OutputFiles`, `@OutputDirectories` or `TaskOutputs.files()`"
);
}
}
for (SelfDescribingSpec<TaskInternal> selfDescribingSpec : cacheIfSpecs) {
if (!selfDescribingSpec.isSatisfiedBy(task)) {
return DefaultTaskOutputCachingState.disabled(
CACHE_IF_SPEC_NOT_SATISFIED,
"'" + selfDescribingSpec.getDisplayName() + "' not satisfied"
);
}
}
for (SelfDescribingSpec<TaskInternal> selfDescribingSpec : doNotCacheIfSpecs) {
if (selfDescribingSpec.isSatisfiedBy(task)) {
return DefaultTaskOutputCachingState.disabled(
DO_NOT_CACHE_IF_SPEC_SATISFIED,
"'" + selfDescribingSpec.getDisplayName() + "' satisfied"
);
}
}
return ENABLED;
}
private TaskExecutionHistory.OverlappingOutputs getOverlapOutputs() {
return history!=null ? history.getOverlappingOutputDetection() : null;
}
@Override
public void cacheIf(final Spec<? super Task> spec) {
cacheIf("Task outputs cacheable", spec);
}
@Override
public void cacheIf(final String cachingEnabledReason, final Spec<? super Task> spec) {
taskMutator.mutate("TaskOutputs.cacheIf(Spec)", new Runnable() {
public void run() {
cacheIfSpecs.add(new SelfDescribingSpec<TaskInternal>(spec, cachingEnabledReason));
}
});
}
@Override
public void doNotCacheIf(final String cachingDisabledReason, final Spec<? super Task> spec) {
taskMutator.mutate("TaskOutputs.doNotCacheIf(Spec)", new Runnable() {
public void run() {
doNotCacheIfSpecs.add(new SelfDescribingSpec<TaskInternal>(spec, cachingDisabledReason));
}
});
}
@Override
public boolean getHasOutput() {
return hasDeclaredOutputs() || !upToDateSpec.isEmpty();
}
@Override
public boolean hasDeclaredOutputs() {
return !filePropertiesInternal.isEmpty();
}
@Override
public FileCollection getFiles() {
return allOutputFiles;
}
@Override
public ImmutableSortedSet<TaskOutputFilePropertySpec> getFileProperties() {
if (fileProperties == null) {
TaskPropertyUtils.ensurePropertiesHaveNames(filePropertiesInternal);
Iterator<TaskOutputFilePropertySpec> flattenedProperties = Iterators.concat(Iterables.transform(filePropertiesInternal, new Function<TaskPropertySpec, Iterator<? extends TaskOutputFilePropertySpec>>() {
@Override
public Iterator<? extends TaskOutputFilePropertySpec> apply(TaskPropertySpec propertySpec) {
if (propertySpec instanceof CompositeTaskOutputPropertySpec) {
return ((CompositeTaskOutputPropertySpec) propertySpec).resolveToOutputProperties();
} else {
return Iterators.singletonIterator((TaskOutputFilePropertySpec) propertySpec);
}
}
}).iterator());
fileProperties = TaskPropertyUtils.collectFileProperties("output", flattenedProperties);
}
return fileProperties;
}
@Override
public TaskOutputFilePropertyBuilder file(final Object path) {
return taskMutator.mutate("TaskOutputs.file(Object)", new Callable<TaskOutputFilePropertyBuilder>() {
@Override
public TaskOutputFilePropertyBuilder call() throws Exception {
return addSpec(new DefaultCacheableTaskOutputFilePropertySpec(task.getName(), resolver, OutputType.FILE, path));
}
});
}
@Override
public TaskOutputFilePropertyBuilder dir(final Object path) {
return taskMutator.mutate("TaskOutputs.dir(Object)", new Callable<TaskOutputFilePropertyBuilder>() {
@Override
public TaskOutputFilePropertyBuilder call() throws Exception {
return addSpec(new DefaultCacheableTaskOutputFilePropertySpec(task.getName(), resolver, OutputType.DIRECTORY, path));
}
});
}
@Override
public TaskOutputFilePropertyBuilder files(final Object... paths) {
return taskMutator.mutate("TaskOutputs.files(Object...)", new Callable<TaskOutputFilePropertyBuilder>() {
@Override
public TaskOutputFilePropertyBuilder call() throws Exception {
return addSpec(new CompositeTaskOutputPropertySpec(task.getName(), resolver, OutputType.FILE, paths));
}
});
}
@Override
public TaskOutputFilePropertyBuilder dirs(final Object... paths) {
return taskMutator.mutate("TaskOutputs.dirs(Object...)", new Callable<TaskOutputFilePropertyBuilder>() {
@Override
public TaskOutputFilePropertyBuilder call() throws Exception {
return addSpec(new CompositeTaskOutputPropertySpec(task.getName(), resolver, OutputType.DIRECTORY, paths));
}
});
}
private TaskOutputFilePropertyBuilder addSpec(TaskOutputPropertySpecAndBuilder spec) {
filePropertiesInternal.add(spec);
return spec;
}
@Override
public FileCollection getPreviousOutputFiles() {
if (history == null) {
throw new IllegalStateException("Task history is currently not available for this task.");
}
return history.getOutputFiles();
}
@Override
public void setHistory(TaskExecutionHistory history) {
this.history = history;
}
private class TaskOutputUnionFileCollection extends CompositeFileCollection implements Describable {
private final TaskInternal buildDependencies;
public TaskOutputUnionFileCollection(TaskInternal buildDependencies) {
this.buildDependencies = buildDependencies;
}
@Override
public String getDisplayName() {
return "task '" + task.getName() + "' output files";
}
@Override
public void visitContents(FileCollectionResolveContext context) {
for (TaskFilePropertySpec propertySpec : getFileProperties()) {
context.add(propertySpec.getPropertyFiles());
}
}
@Override
public void visitDependencies(TaskDependencyResolveContext context) {
context.add(buildDependencies);
super.visitDependencies(context);
}
}
}