/*
 * Copyright 2012-present Facebook, Inc.
 *
 * 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.facebook.buck.step.fs;

import com.facebook.buck.step.ExecutionContext;
import com.facebook.buck.step.Step;
import com.facebook.buck.util.Escaper;
import com.google.common.base.Preconditions;
import java.io.File;

/**
 * Command that runs equivalent command of {@code mkdir -p} on the specified directory.
 */
public class MkdirStep implements Step {

  private final String pathRelativeToProjectRoot;

  public MkdirStep(String pathRelativeToProjectRoot) {
    this.pathRelativeToProjectRoot = Preconditions.checkNotNull(pathRelativeToProjectRoot);
  }

  @Override
  public int execute(ExecutionContext context) {
    synchronized(MkdirStep.class) {
      File directory = new File(getPath(context));
      if (directory.exists()) {
        return 0;
      }
      return directory.mkdirs() ? 0 : -1;
    }
  }

  @Override
  public String getShortName() {
    return "mkdir";
  }

  @Override
  public String getDescription(ExecutionContext context) {
    return String.format("mkdir -p %s",
        Escaper.escapeAsBashString(getPath(context)));
  }

  /**
   * Get the path of the directory to make.
   * @return Path of the directory to make.
   */
  public String getPath(ExecutionContext context) {
    return context.getProjectFilesystem().getPathRelativizer().apply(pathRelativeToProjectRoot);
  }
}