Hello world CLI

java-pfb-cli/README.md

@@ -0,0 +1,6 @@
+Current usage of CLI:
+First, run "fatJar" gradle task in java-pfb-cli
+
+Then, you can use the CLI with the following command:
+java -cp "java-pfb-cli/build/libs/java-pfb-cli.jar" JavaPfbCommand <command> <args>
+Only command right now: "hello"

java-pfb-cli/build.gradle

@@ -0,0 +1,30 @@
+plugins {
+    id 'java'
+}
+
+version 'unspecified'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.1'
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.1'
+    implementation 'info.picocli:picocli:4.7.4'
+}
+
+task fatJar(type: Jar) {
+    manifest {
+        attributes 'Main-Class': "JavaPfbCommand"
+    }
+    archiveBaseName.set('java-pfb-cli')
+    from {
+        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
+    }
+    with jar
+}
+
+test {
+    useJUnitPlatform()
+}

java-pfb-cli/src/main/java/JavaPfbCommand.java

@@ -0,0 +1,20 @@
+import picocli.CommandLine;
+
+import static picocli.CommandLine.Command;
+
+@Command(name = "pfb")
+public class JavaPfbCommand implements Runnable {
+    public static void main(String[] args) {
+        CommandLine.run(new JavaPfbCommand(), args);
+    }
+
+    @Override
+    public void run() {
+        System.out.println("A java implementation of pyPFB");
+    }
+
+    @Command(name = "hello")
+    public void helloCommand() {
+        System.out.println("Hello world!");
+    }
+}

settings.gradle

@@ -2,3 +2,5 @@ rootProject.name = 'javapfb'
 include('service', 'client', 'integration')
 
 gradle.ext.releaseVersion = '0.11.0'
+include 'java-pfb-cli'
+