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AppEnginePlugin.java
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AppEnginePlugin.java
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/*
* Copyright 2016 Google LLC. 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.cloud.tools.gradle.appengine;
import com.google.cloud.tools.gradle.appengine.appyaml.AppEngineAppYamlPlugin;
import com.google.cloud.tools.gradle.appengine.standard.AppEngineStandardPlugin;
import com.google.cloud.tools.gradle.appengine.util.GradleCompatibility;
import java.nio.file.Files;
import java.nio.file.Path;
import org.gradle.api.GradleException;
import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.api.plugins.WarPlugin;
import org.gradle.api.plugins.WarPluginConvention;
import org.gradle.util.GradleVersion;
/**
* This is a getting-started plugin that auto detects the user's configuration and assigns it a
* appengine-web.xml or app.yaml based build.
*/
public class AppEnginePlugin implements Plugin<Project> {
@Override
public void apply(Project project) {
checkGradleVersion();
if (isAppEngineWebXmlBased(project)) {
project.getPluginManager().apply(AppEngineStandardPlugin.class);
} else {
project.getPluginManager().apply(AppEngineAppYamlPlugin.class);
}
}
private boolean isAppEngineWebXmlBased(Project project) {
// ask the war plugin if it has appengine-web.xml
if (project.getPlugins().hasPlugin(WarPlugin.class)) {
WarPluginConvention warConfig = project.getConvention().getPlugin(WarPluginConvention.class);
Path appengineWebXml = warConfig.getWebAppDir().toPath().resolve("WEB-INF/appengine-web.xml");
if (Files.exists(appengineWebXml)) {
return true;
}
}
// convention based lookup of appengine-web.xml as a fallback
Path appengineWebXml =
project.getProjectDir().toPath().resolve("src/main/webapp/WEB-INF/appengine-web.xml");
return Files.exists(appengineWebXml);
}
private void checkGradleVersion() {
if (GradleCompatibility.getMinimumGradleVersion().compareTo(GradleVersion.current()) > 0) {
throw new GradleException(
"Detected "
+ GradleVersion.current()
+ ", but the appengine-gradle-plugin requires "
+ GradleCompatibility.getMinimumGradleVersion()
+ " or higher.");
}
}
}