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GradleProvisioner.java
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GradleProvisioner.java
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/*
* Copyright 2016-2022 DiffPlug
*
* 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.diffplug.gradle.spotless;
import java.io.File;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import org.gradle.api.GradleException;
import org.gradle.api.Project;
import org.gradle.api.artifacts.Configuration;
import org.gradle.api.artifacts.ConfigurationContainer;
import org.gradle.api.artifacts.dsl.DependencyHandler;
import org.gradle.api.attributes.Bundling;
import org.gradle.api.initialization.dsl.ScriptHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.diffplug.common.base.Unhandled;
import com.diffplug.common.collect.ImmutableList;
import com.diffplug.spotless.Provisioner;
/** Should be package-private. */
class GradleProvisioner {
private GradleProvisioner() {}
enum Policy {
INDEPENDENT, ROOT_PROJECT, ROOT_BUILDSCRIPT;
public DedupingProvisioner dedupingProvisioner(Project project) {
switch (this) {
case ROOT_PROJECT:
return new DedupingProvisioner(forProject(project));
case ROOT_BUILDSCRIPT:
return new DedupingProvisioner(forRootProjectBuildscript(project));
case INDEPENDENT:
default:
throw Unhandled.enumException(this);
}
}
}
static class DedupingProvisioner implements Provisioner {
private final Provisioner provisioner;
private final Map<Request, Set<File>> cache = new HashMap<>();
DedupingProvisioner(Provisioner provisioner) {
this.provisioner = provisioner;
}
@Override
public Set<File> provisionWithTransitives(boolean withTransitives, Collection<String> mavenCoordinates) {
Request req = new Request(withTransitives, mavenCoordinates);
Set<File> result;
synchronized (cache) {
result = cache.get(req);
}
if (result != null) {
return result;
} else {
synchronized (cache) {
result = cache.get(req);
if (result == null) {
result = provisioner.provisionWithTransitives(req.withTransitives, req.mavenCoords);
cache.put(req, result);
}
return result;
}
}
}
/** A child Provisioner which retries cached elements only. */
final Provisioner cachedOnly = (withTransitives, mavenCoordinates) -> {
Request req = new Request(withTransitives, mavenCoordinates);
Set<File> result;
synchronized (cache) {
result = cache.get(req);
}
if (result != null) {
return result;
}
throw new GradleException("Add a step with " + req.mavenCoords + " into the `spotlessPredeclare` block in the root project.");
};
}
static Provisioner forProject(Project project) {
return forConfigurationContainer(project, project.getConfigurations(), project.getDependencies());
}
static Provisioner forRootProjectBuildscript(Project project) {
Project rootProject = project.getRootProject();
ScriptHandler buildscript = rootProject.getBuildscript();
return forConfigurationContainer(rootProject, buildscript.getConfigurations(), buildscript.getDependencies());
}
private static Provisioner forConfigurationContainer(Project project, ConfigurationContainer configurations, DependencyHandler dependencies) {
return (withTransitives, mavenCoords) -> {
try {
Configuration config = configurations.create("spotless"
+ new Request(withTransitives, mavenCoords).hashCode());
mavenCoords.stream()
.map(dependencies::create)
.forEach(config.getDependencies()::add);
config.setDescription(mavenCoords.toString());
config.setTransitive(withTransitives);
config.attributes(attr -> {
attr.attribute(Bundling.BUNDLING_ATTRIBUTE, project.getObjects().named(Bundling.class, Bundling.EXTERNAL));
});
return config.resolve();
} catch (Exception e) {
String projName = project.getPath().substring(1).replace(':', '/');
if (!projName.isEmpty()) {
projName = projName + "/";
}
logger.error(
"You need to add a repository containing the '" + mavenCoords + "' artifact in '" + projName + "build.gradle'.\n" +
"E.g.: 'repositories { mavenCentral() }'",
e);
throw e;
}
};
}
private static final Logger logger = LoggerFactory.getLogger(GradleProvisioner.class.getName());
/** Models a request to the provisioner. */
private static class Request {
final boolean withTransitives;
final ImmutableList<String> mavenCoords;
public Request(boolean withTransitives, Collection<String> mavenCoords) {
this.withTransitives = withTransitives;
this.mavenCoords = ImmutableList.copyOf(mavenCoords);
}
@Override
public int hashCode() {
return withTransitives ? mavenCoords.hashCode() : ~mavenCoords.hashCode();
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
} else if (obj instanceof Request) {
Request o = (Request) obj;
return o.withTransitives == withTransitives && o.mavenCoords.equals(mavenCoords);
} else {
return false;
}
}
@Override
public String toString() {
String coords = mavenCoords.toString();
StringBuilder builder = new StringBuilder();
builder.append(coords, 1, coords.length() - 1); // strip off []
if (withTransitives) {
builder.append(" with transitives");
} else {
builder.append(" no transitives");
}
return builder.toString();
}
}
}