/*
* Copyright 2012-2015 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.init;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.springframework.boot.cli.util.Log;
import org.springframework.util.FileCopyUtils;
import org.springframework.util.StreamUtils;
/**
* Helper class used to generate the project.
*
* @author Stephane Nicoll
* @since 1.2.0
*/
class ProjectGenerator {
private static final String ZIP_MIME_TYPE = "application/zip";
private final InitializrService initializrService;
ProjectGenerator(InitializrService initializrService) {
this.initializrService = initializrService;
}
public void generateProject(ProjectGenerationRequest request, boolean force)
throws IOException {
ProjectGenerationResponse response = this.initializrService.generate(request);
String fileName = (request.getOutput() != null ? request.getOutput()
: response.getFileName());
if (shouldExtract(request, response)) {
if (isZipArchive(response)) {
extractProject(response, request.getOutput(), force);
return;
}
else {
Log.info("Could not extract '" + response.getContentType() + "'");
// Use value from the server since we can't extract it
fileName = response.getFileName();
}
}
if (fileName == null) {
throw new ReportableException(
"Could not save the project, the server did not set a preferred "
+ "file name and no location was set. Specify the output location "
+ "for the project.");
}
writeProject(response, fileName, force);
}
/**
* Detect if the project should be extracted.
* @param request the generation request
* @param response the generation response
* @return if the project should be extracted
*/
private boolean shouldExtract(ProjectGenerationRequest request,
ProjectGenerationResponse response) {
if (request.isExtract()) {
return true;
}
// explicit name hasn't been provided for an archive and there is no extension
if (isZipArchive(response) && request.getOutput() != null
&& !request.getOutput().contains(".")) {
return true;
}
return false;
}
private boolean isZipArchive(ProjectGenerationResponse entity) {
if (entity.getContentType() != null) {
try {
return ZIP_MIME_TYPE.equals(entity.getContentType().getMimeType());
}
catch (Exception ex) {
// Ignore
}
}
return false;
}
private void extractProject(ProjectGenerationResponse entity, String output,
boolean overwrite) throws IOException {
File outputFolder = (output != null ? new File(output)
: new File(System.getProperty("user.dir")));
if (!outputFolder.exists()) {
outputFolder.mkdirs();
}
ZipInputStream zipStream = new ZipInputStream(
new ByteArrayInputStream(entity.getContent()));
try {
extractFromStream(zipStream, overwrite, outputFolder);
fixExecutableFlag(outputFolder, "mvnw");
fixExecutableFlag(outputFolder, "gradlew");
Log.info("Project extracted to '" + outputFolder.getAbsolutePath() + "'");
}
finally {
zipStream.close();
}
}
private void extractFromStream(ZipInputStream zipStream, boolean overwrite,
File outputFolder) throws IOException {
ZipEntry entry = zipStream.getNextEntry();
while (entry != null) {
File file = new File(outputFolder, entry.getName());
if (file.exists() && !overwrite) {
throw new ReportableException((file.isDirectory() ? "Directory" : "File")
+ " '" + file.getName()
+ "' already exists. Use --force if you want to overwrite or "
+ "specify an alternate location.");
}
if (!entry.isDirectory()) {
FileCopyUtils.copy(StreamUtils.nonClosing(zipStream),
new FileOutputStream(file));
}
else {
file.mkdir();
}
zipStream.closeEntry();
entry = zipStream.getNextEntry();
}
}
private void writeProject(ProjectGenerationResponse entity, String output,
boolean overwrite) throws IOException {
File outputFile = new File(output);
if (outputFile.exists()) {
if (!overwrite) {
throw new ReportableException("File '" + outputFile.getName()
+ "' already exists. Use --force if you want to "
+ "overwrite or specify an alternate location.");
}
if (!outputFile.delete()) {
throw new ReportableException(
"Failed to delete existing file " + outputFile.getPath());
}
}
FileCopyUtils.copy(entity.getContent(), outputFile);
Log.info("Content saved to '" + output + "'");
}
private void fixExecutableFlag(File dir, String fileName) {
File f = new File(dir, fileName);
if (f.exists()) {
f.setExecutable(true, false);
}
}
}