content: package ganymede.shell.builtin;
  /*-
   * ##########################################################################
   * Ganymede
   * %%
   * Copyright (C) 2021, 2022 Allen D. Ball
   * %%
   * 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.
   * ##########################################################################
   */
  import ball.annotation.ServiceProviderFor;
  import ganymede.notebook.Description;
  import ganymede.notebook.Magic;
  import ganymede.shell.Builtin;
  import ganymede.shell.Shell;
  import ganymede.util.PathPropertyMap;
  import java.io.File;
  import java.io.InputStream;
  import java.io.PrintStream;
  import java.util.stream.Stream;
  import lombok.NoArgsConstructor;
  import lombok.ToString;
  import lombok.extern.log4j.Log4j2;
  
  /**
   * {@link Classpath} {@link Builtin}.  See
   * {@link jdk.jshell.JShell#addToClasspath(String)}.
   *
   * @author {@link.uri mailto:ball@hcf.dev Allen D. Ball}
   */
  @ServiceProviderFor({ Builtin.class, Magic.class })
  @Description("Add to or print JShell classpath")
  @NoArgsConstructor @ToString @Log4j2
  public class Classpath extends Builtin {
      private static final String SEPARATOR = System.getProperty("path.separator");
  
      @Override
      public void execute(Shell shell, InputStream in, PrintStream out, PrintStream err, Application application) throws Exception {
          var code = application.getCode();
  
          if (! code.isBlank()) {
              var files =
                  HELPER.replacePlaceholders(code, System.getProperties()).lines()
                  .filter(t -> (! t.isBlank()))
                  .map(String::strip)
                  .flatMap(t -> Stream.of(t.split(SEPARATOR)))
                  .filter(t -> (! t.isBlank()))
                  .map(String::strip)
                  .map(File::new)
                  .toArray(File[]::new);
  
              shell.addToClasspath(files);
          } else {
              var map = new PathPropertyMap();
  
              shell.resolver().classpath().stream()
                  .map(Object::toString)
                  .map(map::shorten)
                  .forEach(out::println);
          }
      }
  }
  