ChangeDirectoryAction.java

/*
 * Copyright (c) 2009-present the original author or 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
 *
 * 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.
 */
package com.planet57.gshell.commands.file;

import java.io.File;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

import com.planet57.gshell.command.Command;
import com.planet57.gshell.command.CommandContext;
import com.planet57.gshell.util.io.IO;
import com.planet57.gshell.util.io.FileAssert;
import com.planet57.gshell.util.cli2.Argument;
import com.planet57.gshell.util.cli2.Option;
import com.planet57.gshell.util.io.FileSystemAccess;
import com.planet57.gshell.util.jline.Complete;

/**
 * Changes the current directory.
 *
 * @since 2.0
 */
@Command(name = "cd", description = "Changes the current directory")
public class ChangeDirectoryAction
    extends FileCommandActionSupport
{
  @Option(name = "v", longName = "verbose")
  private boolean verbose;

  @Nullable
  @Argument(description = "The path of the directory to change to", token = "PATH")
  @Complete("directory-name")
  private String path;

  @Override
  public Object execute(@Nonnull final CommandContext context) throws Exception {
    IO io = context.getIo();
    FileSystemAccess fs = getFileSystem();

    File file;
    if (path == null) {
      file = fs.getUserHomeDir();
    }
    else {
      file = fs.resolveFile(path);
    }

    new FileAssert(file).exists().isDirectory();
    fs.setUserDir(file);
    if (verbose) {
      io.println(file.getPath());
    }

    return null;
  }
}