Repository: johnpoth/jshell-maven-plugin
Branch: master
Commit: 9223ebc1c3a4
Files: 6
Total size: 26.9 KB

Directory structure:
gitextract_k9ewcfvc/

├── .gitignore
├── LICENSE
├── README.adoc
├── pom.xml
└── src/
    └── main/
        └── java/
            ├── com/
            │   └── github/
            │       └── johnpoth/
            │           └── jshell/
            │               └── JShellMojo.java
            └── module-info.java

================================================
FILE CONTENTS
================================================

================================================
FILE: .gitignore
================================================
target
*.iml
*.ipr
*.iws
.idea
.classpath
.project
.settings

================================================
FILE: LICENSE
================================================
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================================================
FILE: README.adoc
================================================
= jshell-maven-plugin

Maven Plugin for the Java Shell Tool ( https://docs.oracle.com/javase/9/jshell/introduction-jshell.htm[JShell] )

== Run it

[source,shell]
----
$mvn compile com.github.johnpoth:jshell-maven-plugin:1.4:run
|  Welcome to JShell -- Version 10
|  For an introduction type: /help intro
jshell>
----

Now you can start using your project's *runtime* classpath:

[source,shell]
----
jshell> var foo = new org.apache.camel.component.beanclass.ClassComponent()
foo ==> org.apache.camel.component.beanclass.ClassComponent@4d1b0d2a
jshell>
----

To you use your project's test classpath, add *-DtestClasspath* to the command and make sure you have compiled your test classes:
[source,shell]
----
$mvn test-compile com.github.johnpoth:jshell-maven-plugin:1.4:run
----

If you notice some resources missing, you may have to invoke the `install` phase instead:
[source,shell]
----
$mvn install com.github.johnpoth:jshell-maven-plugin:1.4:run -DskipTests
----

Once you project has been built properly, and you haven't updated your source files, you can skip the building phase and invoke the plugin directly:
[source,shell]
----
$mvn com.github.johnpoth:jshell-maven-plugin:1.4:run
----

== Options

[cols="1v,1v,1v"]
|===
|Name |Description |Default value|

class-path|Explicitly set JShell's class path||

module-path|Set JShell's module path||

add-modules|Add modules from JShell's module path||

add-exports|Explicitly add exports||

scripts|Add startup scripts to JShell ',' delimited||

useProjectClasspath|Use project class path in JShell|True|

properties| Configure Java properties||

runtimeClasspath| Add `./target/classes` in classpath|`false`|

testClasspath| Add `./target/test-classes` in classpath|`true`|

options| Add other options to JShell. See https://docs.oracle.com/javase/9/tools/jshell.htm#GUID-C337353B-074A-431C-993F-60C226163F00__OPTIONSFORJSHELL-AF4AC615[docs]||
|===

Reminder: plugin parameters when passed through the command line should be prefixed with 'jshell.' e.g:
 *mvn com.github.johnpoth:jshell-maven-plugin:1.4:run -Djshell.scripts="script0,script1"*

== Adding to pom.xml

To use the plugin's shortened prefix *jshell*, declare the plugin in your pom.xml

[source,xml]
----
<pluginManagement>
  <plugins>
    <plugin>
      <groupId>com.github.johnpoth</groupId>
      <artifactId>jshell-maven-plugin</artifactId>
      <version>1.4</version>
    </plugin>
  </plugins>
</pluginManagement>
----

And now you'll be able to run it by typing *mvn jshell:run*

[source,shell]
----
$mvn jshell:run
|  Welcome to JShell -- Version 10
|  For an introduction type: /help intro
jshell>
----


Works on Java 9, 10 and 11+ Enjoy!


================================================
FILE: pom.xml
================================================
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.github.johnpoth</groupId>
    <artifactId>jshell-maven-plugin</artifactId>
    <version>1.5-SNAPSHOT</version>
    <packaging>maven-plugin</packaging>

    <name>jshell-maven-plugin Maven Plugin</name>
    <description>JShell Maven Plugin</description>
    <url>https://github.com/johnpoth/jshell-maven-plugin</url>
    <licenses>
        <license>
            <name>Apache License 2.0</name>
            <url>http://www.apache.org/licenses/LICENSE-2.0.html</url>
        </license>
    </licenses>

    <developers>
        <developer>
            <name>John Poth</name>
            <email>poth.john@gmail.com</email>
            <timezone>+1</timezone>
        </developer>
        <developer>
            <name>Sean McNamara</name>
        </developer>
    </developers>

    <scm>
        <url>scm:git:git@github.com:johnpoth/jshell-maven-plugin.git</url>
        <connection>scm:git:git@github.com:johnpoth/jshell-maven-plugin.git</connection>
        <developerConnection>scm:git:git@github.com:johnpoth/jshell-maven-plugin.git</developerConnection>
        <tag>HEAD</tag>
    </scm>
    <distributionManagement>
        <snapshotRepository>
            <id>ossrh</id>
            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
        </snapshotRepository>
        <repository>
            <id>ossrh</id>
            <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
        </repository>
    </distributionManagement>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.apache.maven</groupId>
            <artifactId>maven-plugin-api</artifactId>
            <version>3.9.4</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.maven.plugin-tools</groupId>
            <artifactId>maven-plugin-annotations</artifactId>
            <version>3.9.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.maven</groupId>
            <artifactId>maven-artifact</artifactId>
            <version>3.9.4</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

    <build>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-release-plugin</artifactId>
                    <version>3.0.1</version>
                    <configuration>
                        <arguments>-Prelease</arguments>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-javadoc-plugin</artifactId>
                    <version>3.5.0</version>
                </plugin>
            </plugins>
        </pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.owasp</groupId>
                <artifactId>dependency-check-maven</artifactId>
                <version>8.3.1</version>
                <configuration>
                    <scanPlugins>true</scanPlugins>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.11.0</version>
                <configuration>
                    <source>9</source>
                    <target>9</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-plugin-plugin</artifactId>
                <version>3.9.0</version>
                <configuration>
                    <skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound>
                </configuration>
                <executions>
                    <execution>
                        <id>mojo-descriptor</id>
                        <goals>
                            <goal>descriptor</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

    <profiles>
        <profile>
            <id>release</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-gpg-plugin</artifactId>
                        <version>3.1.0</version>
                        <executions>
                            <execution>
                                <id>sign-artifacts</id>
                                <phase>verify</phase>
                                <goals>
                                    <goal>sign</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>
    </profiles>
</project>


================================================
FILE: src/main/java/com/github/johnpoth/jshell/JShellMojo.java
================================================
/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.github.johnpoth.jshell;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugins.annotations.LifecyclePhase;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;
import org.apache.maven.plugins.annotations.ResolutionScope;

import javax.tools.Tool;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.ServiceLoader;
import java.util.stream.Collectors;


@Mojo(name = "run", defaultPhase = LifecyclePhase.INSTALL, requiresDependencyResolution = ResolutionScope.TEST, requiresDependencyCollection = ResolutionScope.TEST)
public class JShellMojo extends AbstractMojo {

    @Parameter(defaultValue = "${project.runtimeClasspathElements}", property = "rcp", required = true)
    private List<String> runtimeClasspathElements;

    @Parameter(defaultValue = "${project.testClasspathElements}", property = "trcp", required = true)
    private List<String> testClasspathElements;

    @Parameter(property = "plugin.artifacts", required = true, readonly = true)
    private List<Artifact> pluginArtifacts;

    @Parameter(defaultValue = "false", property = "runtimeClasspath")
    private boolean runtimeClasspath;

    @Parameter(defaultValue = "true", property = "testClasspath")
    private boolean testClasspath;

    @Parameter(defaultValue = "true", property = "jshell.useProjectClasspath")
    private boolean useProjectClasspath;

    @Parameter(property = "jshell.class-path")
    private String classpath;

    @Parameter(property = "jshell.module-path")
    private String modulepath;

    @Parameter(property = "jshell.add-modules")
    private String addModules;

    @Parameter(property = "jshell.add-exports")
    private String addExports;

    @Parameter(property = "jshell.scripts")
    private List<String> scripts = new ArrayList<>();

    // additional options that may be added in future Java releases.
    @Parameter(property = "jshell.options")
    private List<String> options = new ArrayList<>();

    /**
     * Execution property overrides.
     * <p>
     * Any property defined here will take precedence over any other definition.
     */
    @Parameter
    private Map<String, String> properties;

    public void execute() throws MojoExecutionException {
        Optional<Module> module = ModuleLayer.boot().findModule("jdk.jshell");
        ClassLoader classLoader = module.get().getClassLoader();
        // Until https://issues.apache.org/jira/browse/MNG-6371 is resolved
        ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
        try {
            Thread.currentThread().setContextClassLoader(classLoader);
            ServiceLoader<Tool> sl = ServiceLoader.load(javax.tools.Tool.class);
            Tool jshell = sl.stream()
                    .filter(a -> a.get().name().equals("jshell"))
                    .findAny()
                    .orElseThrow(() -> new RuntimeException("No JShell service providers found!"))
                    .get();
            String[] args = addArguments();
            int exitCode = jshell.run(System.in, System.out, System.err, args);
            if (exitCode != 0) {
                throw new MojoExecutionException("An error was encountered while executing. Exit code:" + exitCode);
            }
        } finally {
            Thread.currentThread().setContextClassLoader(contextClassLoader);
        }
    }

    private String buildClasspath() {
        final List<String> classpathElements = new ArrayList<>();
        if (testClasspath) {
            classpathElements.addAll(testClasspathElements);
        }
        if (runtimeClasspath) {
            classpathElements.addAll(runtimeClasspathElements);
        }
        if (classpath != null) {
            classpathElements.addAll(Arrays.asList(classpath.split(File.pathSeparator)));
        }
        if (!pluginArtifacts.isEmpty()) {
            classpathElements.addAll(
                    pluginArtifacts.stream()
                            .map(artifact -> artifact.getFile().getAbsolutePath())
                            .collect(Collectors.toList())
            );
        }
        return filterClasspath(classpathElements).stream()
                .reduce("", (a, b) -> a + File.pathSeparator + b);
    }

    private List<String> filterClasspath(List<String> cp) {
        return cp.stream()
                .filter(s -> {
                    Path path = Paths.get(s);
                    if (Files.notExists(path)) {
                        getLog().warn("Removing: " + s + " from the classpath." + System.lineSeparator() +
                                "If this is unexpected, please make sure you correctly build the project beforehand by invoking the correct Maven build phase (usually `install`, `test-compile` or `compile`). For example:" + System.lineSeparator() +
                                "mvn test-compile com.github.johnpoth:jshell-maven-plugin:1.3:run" + System.lineSeparator() +
                                "For more information visit https://github.com/johnpoth/jshell-maven-plugin"
                        );
                        return false;
                    }
                    if (Files.isDirectory(path)) {
                        return true;
                    }
                    if (s.endsWith(".jar")) {
                        return true;
                    }
                    getLog().debug("Removing: " + s + " from the classpath because it is unsupported in JShell.");
                    return false;
                }).collect(Collectors.toList());
    }

    private String[] addArguments() {
        List<String> args = new ArrayList<>();
        if (useProjectClasspath) {
            String cp = buildClasspath();
            if (getLog().isDebugEnabled()) {
                getLog().debug("Using classpath: " + cp);
            }
            args.add("--class-path");
            args.add(cp);
        }
        if (modulepath != null) {
            args.add("--module-path");
            args.add(modulepath);
        }
        if (addModules != null) {
            args.add("--add-modules");
            args.add(addModules);
        }
        if (addExports != null) {
            args.add("--add-exports");
            args.add(addExports);
        }

        args.addAll(this.options);

        if (this.properties != null) {
            this.properties.forEach((key, value) -> args.add("-R -D" + key + "=" + value));
        }

        args.addAll(scripts);

        return args.toArray(new String[0]);
    }
}


================================================
FILE: src/main/java/module-info.java
================================================
module com.github.johnpoth.jshell {

   requires jdk.jshell;
   /**not modules yet*/
   requires maven.plugin.api;
   requires maven.plugin.annotations;
   requires maven.artifact;

   exports com.github.johnpoth.jshell;

   uses javax.tools.Tool;
}