/*
* Copyright 2012-2017 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.springframework.boot.cli.command.install;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.codehaus.groovy.control.CompilationFailedException;
import org.springframework.boot.cli.compiler.GroovyCompiler;
import org.springframework.boot.cli.compiler.GroovyCompilerConfiguration;
/**
* A {@code DependencyResolver} implemented using Groovy's {@code @Grab}.
*
* @author Dave Syer
* @author Andy Wilkinson
* @since 1.2.0
*/
class GroovyGrabDependencyResolver implements DependencyResolver {
private final GroovyCompilerConfiguration configuration;
GroovyGrabDependencyResolver(GroovyCompilerConfiguration configuration) {
this.configuration = configuration;
}
@Override
public List<File> resolve(List<String> artifactIdentifiers)
throws CompilationFailedException, IOException {
GroovyCompiler groovyCompiler = new GroovyCompiler(this.configuration);
List<File> artifactFiles = new ArrayList<>();
if (!artifactIdentifiers.isEmpty()) {
List<URL> initialUrls = getClassPathUrls(groovyCompiler);
groovyCompiler.compile(createSources(artifactIdentifiers));
List<URL> artifactUrls = getClassPathUrls(groovyCompiler);
artifactUrls.removeAll(initialUrls);
for (URL artifactUrl : artifactUrls) {
artifactFiles.add(toFile(artifactUrl));
}
}
return artifactFiles;
}
private List<URL> getClassPathUrls(GroovyCompiler compiler) {
return new ArrayList<>(Arrays.asList(compiler.getLoader().getURLs()));
}
private String createSources(List<String> artifactIdentifiers) throws IOException {
File file = File.createTempFile("SpringCLIDependency", ".groovy");
file.deleteOnExit();
OutputStreamWriter stream = new OutputStreamWriter(new FileOutputStream(file),
"UTF-8");
try {
for (String artifactIdentifier : artifactIdentifiers) {
stream.write("@Grab('" + artifactIdentifier + "')");
}
// Dummy class to force compiler to do grab
stream.write("class Installer {}");
}
finally {
stream.close();
}
// Windows paths get tricky unless you work with URI
return file.getAbsoluteFile().toURI().toString();
}
private File toFile(URL url) {
try {
return new File(url.toURI());
}
catch (URISyntaxException ex) {
return new File(url.getPath());
}
}
}