Add cli module

build.sbt

@@ -54,3 +54,12 @@ lazy val core = project
     testOptions in Test  := Seq(Tests.Argument(TestFrameworks.JUnit, "-a")),
     automaticModuleName("dev.dirs")
   )
+
+lazy val cli = project
+  .dependsOn(core)
+  .settings(
+    sharedSettings,
+    name                 := "directories-cli",
+    libraryDependencies  += "info.picocli" % "picocli" % "4.4.0",
+    automaticModuleName("dev.dirs.cli")
+  )

cli/src/main/java/dev/dirs/cli/DirectoriesCli.java

@@ -0,0 +1,71 @@
+package dev.dirs.cli;
+
+import dev.dirs.ProjectDirectories;
+import picocli.CommandLine;
+import picocli.CommandLine.*;
+
+@Command(name = "directories", mixinStandardHelpOptions = true, version = "20")
+public class DirectoriesCli implements Runnable {
+  @Option(names = {"--cache"}, description = "Prints cache directory")
+  boolean cache;
+  @Option(names = {"--config"}, description = "Prints config directory")
+  boolean config;
+  @Option(names = {"--data"}, description = "Prints data directory")
+  boolean data;
+  @Option(names = {"--data-local"}, description = "Prints local data directory")
+  boolean dataLocal;
+  @Option(names = {"--preferences"}, description = "Prints preferences directory")
+  boolean preferences;
+  @Option(names = {"--runtime"}, description = "Prints runtime directory")
+  boolean runtime;
+
+  @Parameters(index = "0")
+  String project;
+
+  @Override
+  public void run() {
+    int dirCount = 0;
+    if (cache) dirCount += 1;
+    if (config) dirCount += 1;
+    if (data) dirCount += 1;
+    if (dataLocal) dirCount += 1;
+    if (preferences) dirCount += 1;
+    if (runtime) dirCount += 1;
+
+    boolean all = dirCount == 0;
+
+    ProjectDirectories projDirs = ProjectDirectories.from(null, null, project);
+
+    if (dirCount == 1) {
+      if (cache)
+        System.out.println(projDirs.cacheDir);
+      if (config)
+        System.out.println(projDirs.configDir);
+      if (data)
+        System.out.println(projDirs.dataDir);
+      if (dataLocal)
+        System.out.println(projDirs.dataLocalDir);
+      if (preferences)
+        System.out.println(projDirs.preferenceDir);
+      if (runtime)
+        System.out.println(projDirs.runtimeDir);
+    } else {
+      if (all || cache)
+        System.out.println("cache:      " + projDirs.cacheDir);
+      if (all || config)
+        System.out.println("config:     " + projDirs.configDir);
+      if (all || data)
+        System.out.println("data:       " + projDirs.dataDir);
+      if (all || dataLocal)
+        System.out.println("local data: " + projDirs.dataLocalDir);
+      if (all || preferences)
+        System.out.println("preference: " + projDirs.preferenceDir);
+      if (all || runtime)
+        System.out.println("runtime:    " + projDirs.runtimeDir);
+    }
+  }
+
+  public static void main(String... args) {
+    System.exit(new CommandLine(new DirectoriesCli()).execute(args));
+  }
+}