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package com.amadornes.artifactural.gradle;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import org.gradle.api.Project;
import org.gradle.api.artifacts.ClientModule;
import org.gradle.api.artifacts.Configuration;
import org.gradle.api.artifacts.Dependency;
import org.gradle.api.artifacts.DependencyArtifact;
import org.gradle.api.artifacts.FileCollectionDependency;
import org.gradle.api.artifacts.ModuleDependency;
import java.io.File;
import java.util.Set;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
public class DependencyResolver {
private final Project project;
private final AtomicInteger counter = new AtomicInteger(0);
private final Cache<String, CompletableFuture<Set<File>>> resolved = CacheBuilder.newBuilder().expireAfterWrite(30, TimeUnit.MINUTES).build();
public DependencyResolver(Project project) {
this.project = project;
}
/**
* Resolves a dependency, downloading the file and its transitives
* if not cached and returns the set of files.
*/
public Set<File> resolveDependency(Dependency dependency) {
if (dependency instanceof FileCollectionDependency) {
return ((FileCollectionDependency) dependency).getFiles().getFiles();
}
String name = dependency.getGroup() + ":" + dependency.getName() + ":" + dependency.getVersion();
if (dependency instanceof ModuleDependency) {
Set<DependencyArtifact> artifacts = ((ModuleDependency) dependency).getArtifacts();
if (!artifacts.isEmpty()) {
DependencyArtifact artifact = artifacts.iterator().next();
name += ":" + artifact.getClassifier() + "@" + artifact.getExtension();
}
}
// If this dep is being resolved on another thread, let it do it
CompletableFuture<Set<File>> future;
boolean found = true;
synchronized (resolved) {
future = resolved.getIfPresent(name);
if (future == null) {
resolved.put(name, future = new CompletableFuture<>());
found = false;
}
}
if (found) {
try {
return future.get();
} catch (InterruptedException | ExecutionException ex) {
throw new RuntimeException(ex);
}
}
// No other thread is resolving this dep and we've claimed it, so let's go!
int currentID = counter.getAndIncrement();
Configuration cfg = project.getConfigurations().maybeCreate("resolve_dep_" + currentID);
cfg.getDependencies().add(dependency);
Set<File> files = cfg.resolve();
project.getConfigurations().remove(cfg);
future.complete(files);
return files;
}
/**
* Resolves a dependency, downloading the file and its transitives
* if not cached and returns the set of files.
*/
public Set<File> resolveDependency(Object dependency) {
Dependency dep = project.getDependencies().create(dependency);
return resolveDependency(dep);
}
/**
* Resolves a dependency, downloading the file and its transitives
* if not cached and returns the set of files.
*/
public Set<File> resolveDependency(Object dependency, boolean transitive) {
Dependency dep = project.getDependencies().create(dependency);
if (dep instanceof ClientModule) {
dep = ((ClientModule) dep).copy().setTransitive(transitive);
}
return resolveDependency(dep);
}
/**
* Resolves a single dependency without any of its transitives
* if not cached and returns the file.
*/
public File resolveSingleDependency(Object dependency) {
return resolveDependency(dependency, false).iterator().next();
}
}
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