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ProjectGenerator.java
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/*
* 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 io.spring.initializr.generator;
import java.beans.PropertyDescriptor;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import io.spring.initializr.InitializrException;
import io.spring.initializr.metadata.BillOfMaterials;
import io.spring.initializr.metadata.Dependency;
import io.spring.initializr.metadata.InitializrConfiguration.Env.Maven.ParentPom;
import io.spring.initializr.metadata.InitializrMetadata;
import io.spring.initializr.metadata.InitializrMetadataProvider;
import io.spring.initializr.metadata.MetadataElement;
import io.spring.initializr.util.TemplateRenderer;
import io.spring.initializr.util.Version;
import io.spring.initializr.util.VersionProperty;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeanWrapperImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.util.Assert;
import org.springframework.util.FileSystemUtils;
import org.springframework.util.StreamUtils;
/**
* Generate a project based on the configured metadata.
*
* @author Dave Syer
* @author Stephane Nicoll
* @author Sebastien Deleuze
* @author Andy Wilkinson
*/
public class ProjectGenerator {
private static final Logger log = LoggerFactory.getLogger(ProjectGenerator.class);
private static final Version VERSION_1_2_0_RC1 = Version.parse("1.2.0.RC1");
private static final Version VERSION_1_3_0_M1 = Version.parse("1.3.0.M1");
private static final Version VERSION_1_4_0_M2 = Version.parse("1.4.0.M2");
private static final Version VERSION_1_4_0_M3 = Version.parse("1.4.0.M3");
private static final Version VERSION_1_4_2_M1 = Version.parse("1.4.2.M1");
private static final Version VERSION_1_5_0_M1 = Version.parse("1.5.0.M1");
private static final Version VERSION_2_0_0_M1 = Version.parse("2.0.0.M1");
@Autowired
private ApplicationEventPublisher eventPublisher;
@Autowired
private InitializrMetadataProvider metadataProvider;
@Autowired
private ProjectRequestResolver requestResolver;
@Autowired
private TemplateRenderer templateRenderer = new TemplateRenderer();
@Autowired
private ProjectResourceLocator projectResourceLocator = new ProjectResourceLocator();
@Value("${TMPDIR:.}/initializr")
private String tmpdir;
private File temporaryDirectory;
private transient Map<String, List<File>> temporaryFiles = new LinkedHashMap<>();
public InitializrMetadataProvider getMetadataProvider() {
return metadataProvider;
}
public void setEventPublisher(ApplicationEventPublisher eventPublisher) {
this.eventPublisher = eventPublisher;
}
public void setMetadataProvider(InitializrMetadataProvider metadataProvider) {
this.metadataProvider = metadataProvider;
}
public void setRequestResolver(ProjectRequestResolver requestResolver) {
this.requestResolver = requestResolver;
}
public void setTemplateRenderer(TemplateRenderer templateRenderer) {
this.templateRenderer = templateRenderer;
}
public void setProjectResourceLocator(ProjectResourceLocator projectResourceLocator) {
this.projectResourceLocator = projectResourceLocator;
}
public void setTmpdir(String tmpdir) {
this.tmpdir = tmpdir;
}
public void setTemporaryDirectory(File temporaryDirectory) {
this.temporaryDirectory = temporaryDirectory;
}
public void setTemporaryFiles(Map<String, List<File>> temporaryFiles) {
this.temporaryFiles = temporaryFiles;
}
/**
* Generate a Maven pom for the specified {@link ProjectRequest}.
*/
public byte[] generateMavenPom(ProjectRequest request) {
try {
Map<String, Object> model = resolveModel(request);
if (!isMavenBuild(request)) {
throw new InvalidProjectRequestException("Could not generate Maven pom, "
+ "invalid project type " + request.getType());
}
byte[] content = doGenerateMavenPom(model);
publishProjectGeneratedEvent(request);
return content;
}
catch (InitializrException ex) {
publishProjectFailedEvent(request, ex);
throw ex;
}
}
/**
* Generate a Gradle build file for the specified {@link ProjectRequest}.
*/
public byte[] generateGradleBuild(ProjectRequest request) {
try {
Map<String, Object> model = resolveModel(request);
if (!isGradleBuild(request)) {
throw new InvalidProjectRequestException(
"Could not generate Gradle build, " + "invalid project type "
+ request.getType());
}
byte[] content = doGenerateGradleBuild(model);
publishProjectGeneratedEvent(request);
return content;
}
catch (InitializrException ex) {
publishProjectFailedEvent(request, ex);
throw ex;
}
}
/**
* Generate a project structure for the specified {@link ProjectRequest}. Returns a
* directory containing the project.
*/
public File generateProjectStructure(ProjectRequest request) {
try {
return doGenerateProjectStructure(request);
}
catch (InitializrException ex) {
publishProjectFailedEvent(request, ex);
throw ex;
}
}
protected File doGenerateProjectStructure(ProjectRequest request) {
Map<String, Object> model = resolveModel(request);
File rootDir;
try {
rootDir = File.createTempFile("tmp", "", getTemporaryDirectory());
}
catch (IOException e) {
throw new IllegalStateException("Cannot create temp dir", e);
}
addTempFile(rootDir.getName(), rootDir);
rootDir.delete();
rootDir.mkdirs();
File dir = initializerProjectDir(rootDir, request);
if (isGradleBuild(request)) {
String gradle = new String(doGenerateGradleBuild(model));
writeText(new File(dir, "build.gradle"), gradle);
writeGradleWrapper(dir, Version.safeParse(request.getBootVersion()));
}
else {
String pom = new String(doGenerateMavenPom(model));
writeText(new File(dir, "pom.xml"), pom);
writeMavenWrapper(dir);
}
generateGitIgnore(dir, request);
generateDockerFile(dir, model);
String applicationName = request.getApplicationName();
String language = request.getLanguage();
String codeLocation = language;
File src = new File(new File(dir, "src/main/" + codeLocation),
request.getPackageName().replace(".", "/"));
src.mkdirs();
String extension = ("kotlin".equals(language) ? "kt" : language);
write(new File(src, applicationName + "." + extension),
"Application." + extension, model);
if ("war".equals(request.getPackaging())) {
String fileName = "ServletInitializer." + extension;
write(new File(src, fileName), fileName, model);
}
File test = new File(new File(dir, "src/test/" + codeLocation),
request.getPackageName().replace(".", "/"));
test.mkdirs();
setupTestModel(request, model);
write(new File(test, applicationName + "Tests." + extension),
"ApplicationTests." + extension, model);
File resources = new File(dir, "src/main/resources");
resources.mkdirs();
writeText(new File(resources, "application.properties"), "");
if (request.hasWebFacet()) {
new File(dir, "src/main/resources/templates").mkdirs();
new File(dir, "src/main/resources/static").mkdirs();
}
publishProjectGeneratedEvent(request);
return rootDir;
}
/**
* Create a distribution file for the specified project structure directory and
* extension
*/
public File createDistributionFile(File dir, String extension) {
File download = new File(getTemporaryDirectory(), dir.getName() + extension);
addTempFile(dir.getName(), download);
return download;
}
private File getTemporaryDirectory() {
if (temporaryDirectory == null) {
temporaryDirectory = new File(tmpdir, "initializr");
temporaryDirectory.mkdirs();
}
return temporaryDirectory;
}
/**
* Clean all the temporary files that are related to this root directory.
* @see #createDistributionFile
*/
public void cleanTempFiles(File dir) {
List<File> tempFiles = temporaryFiles.remove(dir.getName());
if (!tempFiles.isEmpty()) {
tempFiles.forEach((File file) -> {
if (file.isDirectory()) {
FileSystemUtils.deleteRecursively(file);
}
else if (file.exists()) {
file.delete();
}
});
}
}
private void publishProjectGeneratedEvent(ProjectRequest request) {
ProjectGeneratedEvent event = new ProjectGeneratedEvent(request);
eventPublisher.publishEvent(event);
}
private void publishProjectFailedEvent(ProjectRequest request, Exception cause) {
ProjectFailedEvent event = new ProjectFailedEvent(request, cause);
eventPublisher.publishEvent(event);
}
protected void generateDockerFile(File dir, Map<String, Object> model){
write(new File(dir, "Dockerfile"), "Dockerfile", model);
write(new File(dir, "docker.sh"), "docker.sh", model);
write(new File(dir, "docker-run.sh"), "docker-run.sh", model);
}
/**
* Generate a {@code .gitignore} file for the specified {@link ProjectRequest}
* @param dir the root directory of the project
* @param request the request to handle
*/
protected void generateGitIgnore(File dir, ProjectRequest request) {
Map<String, Object> model = new LinkedHashMap<>();
if (isMavenBuild(request)) {
model.put("build", "maven");
model.put("mavenBuild", true);
}
else {
model.put("build", "gradle");
}
write(new File(dir, ".gitignore"), "gitignore.tmpl", model);
}
/**
* Resolve the specified {@link ProjectRequest} and return the model to use to
* generate the project
* @param originalRequest the request to handle
* @return a model for that request
*/
protected Map<String, Object> resolveModel(ProjectRequest originalRequest) {
Assert.notNull(originalRequest.getBootVersion(), "boot version must not be null");
Map<String, Object> model = new LinkedHashMap<>();
InitializrMetadata metadata = metadataProvider.get();
ProjectRequest request = requestResolver.resolve(originalRequest, metadata);
// request resolved so we can log what has been requested
List<Dependency> dependencies = request.getResolvedDependencies();
List<String> dependencyIds = dependencies.stream().map(Dependency::getId)
.collect(Collectors.toList());
log.info("Processing request{type=" + request.getType() + ", dependencies="
+ dependencyIds);
if (isWar(request)) {
model.put("war", true);
}
if (isMavenBuild(request)) {
model.put("mavenBuild", true);
ParentPom parentPom = metadata.getConfiguration().getEnv().getMaven()
.resolveParentPom(request.getBootVersion());
if (parentPom.isIncludeSpringBootBom()
&& !request.getBoms().containsKey("spring-boot")) {
request.getBoms().put("spring-boot", metadata.createSpringBootBom(
request.getBootVersion(), "spring-boot.version"));
}
model.put("mavenParentGroupId", parentPom.getGroupId());
model.put("mavenParentArtifactId", parentPom.getArtifactId());
model.put("mavenParentVersion", parentPom.getVersion());
model.put("includeSpringBootBom", parentPom.isIncludeSpringBootBom());
}
model.put("repositoryValues", request.getRepositories().entrySet());
if (!request.getRepositories().isEmpty()) {
model.put("hasRepositories", true);
}
List<Map<String,String>> resolvedBoms = buildResolvedBoms(request);
model.put("resolvedBoms", resolvedBoms);
ArrayList<Map<String,String>> reversedBoms = new ArrayList<>(resolvedBoms);
Collections.reverse(reversedBoms);
model.put("reversedBoms", reversedBoms);
model.put("compileDependencies",
filterDependencies(dependencies, Dependency.SCOPE_COMPILE));
model.put("runtimeDependencies",
filterDependencies(dependencies, Dependency.SCOPE_RUNTIME));
model.put("compileOnlyDependencies",
filterDependencies(dependencies, Dependency.SCOPE_COMPILE_ONLY));
model.put("providedDependencies",
filterDependencies(dependencies, Dependency.SCOPE_PROVIDED));
model.put("testDependencies",
filterDependencies(dependencies, Dependency.SCOPE_TEST));
request.getBoms().forEach((k, v) -> {
if (v.getVersionProperty() != null) {
request.getBuildProperties().getVersions().computeIfAbsent(
v.getVersionProperty(), key -> v::getVersion);
}
});
Map<String, String> versions = new LinkedHashMap<>();
model.put("buildPropertiesVersions", versions.entrySet());
request.getBuildProperties().getVersions().forEach((k, v) ->
versions.put(computeVersionProperty(request,k), v.get()));
Map<String, String> gradle = new LinkedHashMap<>();
model.put("buildPropertiesGradle", gradle.entrySet());
request.getBuildProperties().getGradle().forEach((k, v) ->
gradle.put(k, v.get()));
Map<String, String> maven = new LinkedHashMap<>();
model.put("buildPropertiesMaven", maven.entrySet());
request.getBuildProperties().getMaven().forEach((k, v) -> maven.put(k, v.get()));
// Add various versions
model.put("dependencyManagementPluginVersion", metadata.getConfiguration()
.getEnv().getGradle().getDependencyManagementPluginVersion());
model.put("kotlinVersion",
metadata.getConfiguration().getEnv().getKotlin().getVersion());
if ("kotlin".equals(request.getLanguage())) {
model.put("kotlin", true);
}
if ("groovy".equals(request.getLanguage())) {
model.put("groovy", true);
}
model.put("isRelease", request.getBootVersion().contains("RELEASE"));
// @SpringBootApplication available as from 1.2.0.RC1
model.put("useSpringBootApplication", VERSION_1_2_0_RC1
.compareTo(Version.safeParse(request.getBootVersion())) <= 0);
// Gradle plugin has changed as from 1.3.0
model.put("bootOneThreeAvailable", VERSION_1_3_0_M1
.compareTo(Version.safeParse(request.getBootVersion())) <= 0);
model.put("bootTwoZeroAvailable", VERSION_2_0_0_M1
.compareTo(Version.safeParse(request.getBootVersion())) <= 0);
// Gradle plugin has changed again as from 1.4.2
model.put("springBootPluginName",
(VERSION_1_4_2_M1
.compareTo(Version.safeParse(request.getBootVersion())) <= 0
? "org.springframework.boot" : "spring-boot"));
// New testing stuff
model.put("newTestInfrastructure", isNewTestInfrastructureAvailable(request));
// New Servlet Initializer location
model.put("newServletInitializer", isNewServletInitializerAvailable(request));
// Java versions
model.put("isJava6", isJavaVersion(request, "1.6"));
model.put("isJava7", isJavaVersion(request, "1.7"));
model.put("isJava8", isJavaVersion(request, "1.8"));
// Append the project request to the model
BeanWrapperImpl bean = new BeanWrapperImpl(request);
for (PropertyDescriptor descriptor : bean.getPropertyDescriptors()) {
if (bean.isReadableProperty(descriptor.getName())) {
model.put(descriptor.getName(),
bean.getPropertyValue(descriptor.getName()));
}
}
if (!request.getBoms().isEmpty()) {
model.put("hasBoms", true);
}
return model;
}
private List<Map<String,String>> buildResolvedBoms(ProjectRequest request) {
return request.getBoms().values().stream()
.sorted(Comparator.comparing(BillOfMaterials::getOrder))
.map(bom -> toBomModel(request, bom))
.collect(Collectors.toList());
}
private Map<String,String> toBomModel(ProjectRequest request, BillOfMaterials bom) {
Map<String, String> model = new HashMap<>();
model.put("groupId", bom.getGroupId());
model.put("artifactId", bom.getArtifactId());
model.put("versionToken", (bom.getVersionProperty() != null
? "${" + computeVersionProperty(request, bom.getVersionProperty()) + "}"
: bom.getVersion()));
return model;
}
private String computeVersionProperty(ProjectRequest request,
VersionProperty property) {
if (isGradleBuild(request)) {
return property.toCamelCaseFormat();
}
return property.toStandardFormat();
}
protected void setupTestModel(ProjectRequest request, Map<String, Object> model) {
String imports = "";
String testAnnotations = "";
boolean newTestInfrastructure = isNewTestInfrastructureAvailable(request);
if (newTestInfrastructure) {
imports += String.format(
generateImport("org.springframework.boot.test.context.SpringBootTest",
request.getLanguage()) + "%n");
imports += String.format(
generateImport("org.springframework.test.context.junit4.SpringRunner",
request.getLanguage()) + "%n");
}
else {
imports += String.format(generateImport(
"org.springframework.boot.test.SpringApplicationConfiguration",
request.getLanguage()) + "%n");
imports += String.format(generateImport(
"org.springframework.test.context.junit4.SpringJUnit4ClassRunner",
request.getLanguage()) + "%n");
}
if (request.hasWebFacet() && !newTestInfrastructure) {
imports += String.format(generateImport(
"org.springframework.test.context.web.WebAppConfiguration",
request.getLanguage()) + "%n");
testAnnotations = String.format("@WebAppConfiguration%n");
}
model.put("testImports", imports);
model.put("testAnnotations", testAnnotations);
}
protected String generateImport(String type, String language) {
String end = ("groovy".equals(language) || "kotlin".equals(language)) ? "" : ";";
return "import " + type + end;
}
private static boolean isGradleBuild(ProjectRequest request) {
return "gradle".equals(request.getBuild());
}
private static boolean isMavenBuild(ProjectRequest request) {
return "maven".equals(request.getBuild());
}
private static boolean isWar(ProjectRequest request) {
return "war".equals(request.getPackaging());
}
private static boolean isNewTestInfrastructureAvailable(ProjectRequest request) {
return VERSION_1_4_0_M2
.compareTo(Version.safeParse(request.getBootVersion())) <= 0;
}
private static boolean isNewServletInitializerAvailable(ProjectRequest request) {
return VERSION_1_4_0_M3
.compareTo(Version.safeParse(request.getBootVersion())) <= 0;
}
private static boolean isGradle3Available(Version bootVersion) {
return VERSION_1_5_0_M1.compareTo(bootVersion) <= 0;
}
private static boolean isJavaVersion(ProjectRequest request, String version) {
return request.getJavaVersion().equals(version);
}
private byte[] doGenerateMavenPom(Map<String, Object> model) {
return templateRenderer.process("starter-pom.xml", model).getBytes();
}
private byte[] doGenerateGradleBuild(Map<String, Object> model) {
return templateRenderer.process("starter-build.gradle", model).getBytes();
}
private void writeGradleWrapper(File dir, Version bootVersion) {
String gradlePrefix = isGradle3Available(bootVersion) ? "gradle3" : "gradle";
writeTextResource(dir, "gradlew.bat", gradlePrefix + "/gradlew.bat");
writeTextResource(dir, "gradlew", gradlePrefix + "/gradlew");
File wrapperDir = new File(dir, "gradle/wrapper");
wrapperDir.mkdirs();
writeTextResource(wrapperDir, "gradle-wrapper.properties",
gradlePrefix + "/gradle/wrapper/gradle-wrapper.properties");
writeBinaryResource(wrapperDir, "gradle-wrapper.jar",
gradlePrefix + "/gradle/wrapper/gradle-wrapper.jar");
}
private void writeMavenWrapper(File dir) {
writeTextResource(dir, "mvnw.cmd", "maven/mvnw.cmd");
writeTextResource(dir, "mvnw", "maven/mvnw");
File wrapperDir = new File(dir, ".mvn/wrapper");
wrapperDir.mkdirs();
writeTextResource(wrapperDir, "maven-wrapper.properties",
"maven/wrapper/maven-wrapper.properties");
writeBinaryResource(wrapperDir, "maven-wrapper.jar",
"maven/wrapper/maven-wrapper.jar");
}
private File writeBinaryResource(File dir, String name, String location) {
return doWriteProjectResource(dir, name, location, true);
}
private File writeTextResource(File dir, String name, String location) {
return doWriteProjectResource(dir, name, location, false);
}
private File doWriteProjectResource(File dir, String name, String location,
boolean binary) {
File target = new File(dir, name);
if (binary) {
writeBinary(target, projectResourceLocator
.getBinaryResource("classpath:project/" + location));
}
else {
writeText(target, projectResourceLocator
.getTextResource("classpath:project/" + location));
}
return target;
}
private File initializerProjectDir(File rootDir, ProjectRequest request) {
if (request.getBaseDir() != null) {
File dir = new File(rootDir, request.getBaseDir());
dir.mkdirs();
return dir;
}
else {
return rootDir;
}
}
public void write(File target, String templateName, Map<String, Object> model) {
String body = templateRenderer.process(templateName, model);
writeText(target, body);
}
private void writeText(File target, String body) {
try (OutputStream stream = new FileOutputStream(target)) {
StreamUtils.copy(body, Charset.forName("UTF-8"), stream);
}
catch (Exception e) {
throw new IllegalStateException("Cannot write file " + target, e);
}
}
private void writeBinary(File target, byte[] body) {
try (OutputStream stream = new FileOutputStream(target)) {
StreamUtils.copy(body, stream);
}
catch (Exception e) {
throw new IllegalStateException("Cannot write file " + target, e);
}
}
private void addTempFile(String group, File file) {
temporaryFiles.computeIfAbsent(group, key -> new ArrayList<>()).add(file);
}
private static List<Dependency> filterDependencies(List<Dependency> dependencies,
String scope) {
return dependencies.stream().filter(dep -> scope.equals(dep.getScope()))
.sorted(Comparator.comparing(MetadataElement::getId))
.collect(Collectors.toList());
}
}