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Generates Micronaut applications
/*
* Copyright 2017-2022 original 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
*
* https://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.micronaut.starter.cli.command;
import io.micronaut.core.util.StringUtils;
import io.micronaut.core.util.SupplierUtil;
import io.micronaut.starter.application.ApplicationType;
import io.micronaut.starter.application.Project;
import io.micronaut.starter.feature.AvailableFeatures;
import io.micronaut.starter.feature.BaseAvailableFeatures;
import io.micronaut.starter.feature.Feature;
import io.micronaut.starter.options.BuildTool;
import io.micronaut.starter.options.JdkVersion;
import io.micronaut.starter.options.Language;
import io.micronaut.starter.options.MicronautJdkVersionConfiguration;
import io.micronaut.starter.options.TestFramework;
import io.micronaut.starter.util.NameUtils;
import org.jline.reader.EndOfFileException;
import org.jline.reader.LineReader;
import org.jline.reader.LineReaderBuilder;
import org.jline.reader.UserInterruptException;
import org.jline.reader.impl.DefaultParser;
import org.jline.reader.impl.completer.StringsCompleter;
import org.jline.terminal.Terminal;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import static picocli.CommandLine.Help.Ansi.AUTO;
/**
* Abstract class to be extended by interactive commands.
* @author Sergio del Amo
* @since 3.8.0
*/
public abstract class BuilderCommand extends BaseCommand implements Callable {
// Wrapped in a memoized Supplier, so it's not created at build time
public static final Supplier PROMPT = SupplierUtil.memoized(() -> AUTO.string("@|blue > |@"));
protected List getFeatures(ApplicationType applicationType, Terminal terminal, List features) {
AvailableFeatures availableFeatures = new BaseAvailableFeatures(features, applicationType);
List featureNames = availableFeatures.getFeatures().map(Feature::getName).collect(Collectors.toList());
LineReader featuresReader = LineReaderBuilder.builder()
.terminal(terminal)
.completer(new StringsCompleter(featureNames))
.parser(new DefaultParser())
.variable(LineReader.LIST_MAX, 50) // max tab completion candidates
.build();
out("Enter any features to apply. Use tab for autocomplete and separate by a space.");
while (true) {
String featuresLine = featuresReader.readLine(PROMPT.get());
if (StringUtils.trimToNull(featuresLine) == null) {
out("");
return new ArrayList<>();
}
List selectedFeatures = Arrays.asList(featuresLine.split(" "));
List invalidFeatures = new ArrayList<>();
for (String name: selectedFeatures) {
if (!availableFeatures.findFeature(name).isPresent()) {
invalidFeatures.add(name);
}
}
if (!invalidFeatures.isEmpty()) {
err("The following features are not valid: " + invalidFeatures);
} else {
out("");
return selectedFeatures;
}
}
}
protected BuildTool getBuildTool(LineReader reader, Language language) {
out("Choose your preferred build tool. (enter for default)");
return getEnumOption(
BuildTool.class,
BuildTool::getTitle,
language.getDefaults().getBuild(),
reader
);
}
protected JdkVersion getJdkVersion(LineReader reader) {
List candidates = new JdkVersionCandidates();
JdkVersion defaultOption = MicronautJdkVersionConfiguration.DEFAULT_OPTION;
if (candidates.size() == 1) {
return defaultOption;
}
out("Choose the target JDK. (enter for default)");
return JdkVersion.valueOf(Integer.parseInt(getListOption(
candidates,
s -> s,
String.valueOf(defaultOption.majorVersion()),
reader
)));
}
protected int getOption(LineReader reader, int max) throws UserInterruptException, EndOfFileException {
String line;
while (true) {
line = reader.readLine(PROMPT.get());
try {
if (line == null || line.isEmpty()) {
return -1;
}
int choice = Integer.parseInt(line);
if (choice > max || choice < 1) {
err("Invalid selection");
} else {
return choice;
}
} catch (NumberFormatException e) {
err("Invalid selection");
}
}
}
protected > T getEnumOption(T[] types,
Function titleFunc,
T defaultOption,
LineReader reader) throws UserInterruptException, EndOfFileException {
for (int i = 0; i < types.length; i++) {
T type = types[i];
out(AUTO.string("@|blue " + (type == defaultOption ? "*" : " ") + (i + 1) + ")|@ " + titleFunc.apply(type)));
}
int option = getOption(reader, types.length);
out("");
if (option == -1) {
return defaultOption;
}
int choice = option - 1;
return types[choice];
}
protected String getListOption(List types,
Function titleFunc,
String defaultOption,
LineReader reader) throws UserInterruptException, EndOfFileException {
for (int i = 0; i < types.size(); i++) {
String type = types.get(i);
out(AUTO.string("@|blue " + (type.equals(defaultOption) ? "*" : " ") + (i + 1) + ")|@ " + titleFunc.apply(type)));
}
int option = getOption(reader, types.size());
out("");
if (option == -1) {
return defaultOption;
}
int choice = option - 1;
return types.get(choice);
}
protected > T getEnumOption(Class enumClass,
Function titleFunc,
T defaultOption,
LineReader reader) throws UserInterruptException, EndOfFileException {
T[] types = enumClass.getEnumConstants();
return getEnumOption(types, titleFunc, defaultOption, reader);
}
protected Feature getFeatureOption(List features,
Function titleFunc,
Feature defaultOption,
LineReader reader) throws UserInterruptException, EndOfFileException {
for (int i = 0; i < features.size(); i++) {
Feature feature = features.get(i);
out(AUTO.string("@|blue " + (feature.getName().equals(defaultOption.getName()) ? "*" : " ") + (i + 1) + ")|@ " + titleFunc.apply(feature)));
}
int option = getOption(reader, features.size());
out("");
if (option == -1) {
return defaultOption;
}
int choice = option - 1;
return features.get(choice);
}
protected Project getProject(LineReader reader) {
out("Enter a name for the project.");
while (true) {
try {
String name = reader.readLine(PROMPT.get());
Project project = NameUtils.parse(name);
out("");
return project;
} catch (IllegalArgumentException e) {
err(e.getMessage());
}
}
}
protected TestFramework getTestFramework(LineReader reader, Language language) {
out("Choose your preferred test framework. (enter for default)");
return getEnumOption(
TestFramework.class,
TestFramework::getTitle,
language.getDefaults().getTest(),
reader
);
}
}