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/*
 * Copyright 2000-2013 JetBrains s.r.o.
 *
 * 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 git4idea.test;

import com.intellij.openapi.project.Project;
import com.intellij.openapi.vcs.ProjectLevelVcsManager;
import com.intellij.openapi.vcs.impl.ProjectLevelVcsManagerImpl;
import com.intellij.openapi.vfs.LocalFileSystem;
import com.intellij.openapi.vfs.VirtualFile;
import git4idea.GitUtil;
import git4idea.GitVcs;
import git4idea.repo.GitRepository;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.ide.BuiltInServerManagerImpl;

import java.io.File;

import static com.intellij.openapi.vcs.Executor.*;
import static git4idea.test.GitExecutor.git;
import static junit.framework.Assert.assertNotNull;
import static org.junit.Assume.assumeTrue;

public class GitTestUtil {

  public static final String USER_NAME = "John Doe";
  public static final String USER_EMAIL = "John.Doe@example.com";

  /**
   * <p>Creates file structure for given paths. Path element should be a relative (from project root)
   * path to a file or a directory. All intermediate paths will be created if needed.
   * To create a dir without creating a file pass "dir/" as a parameter.</p>
   * <p>Usage example:
   * <code>createFileStructure("a.txt", "b.txt", "dir/c.txt", "dir/subdir/d.txt", "anotherdir/");</code></p>
   * <p>This will create files a.txt and b.txt in the project dir, create directories dir, dir/subdir and anotherdir,
   * and create file c.txt in dir and d.txt in dir/subdir.</p>
   * <p>Note: use forward slash to denote directories, even if it is backslash that separates dirs in your system.</p>
   * <p>All files are populated with "initial content" string.</p>
   */
  public static void createFileStructure(@NotNull VirtualFile rootDir, String... paths) {
    for (String path : paths) {
      cd(rootDir);
      boolean dir = path.endsWith("/");
      if (dir) {
        mkdir(path);
      }
      else {
        touch(path, "initial_content_" + Math.random());
      }
    }
  }

  private static void initRepo(@NotNull String repoRoot, boolean makeInitialCommit) {
    cd(repoRoot);
    git("init");
    setupUsername();
    if (makeInitialCommit) {
      touch("initial.txt");
      git("add initial.txt");
      git("commit -m initial");
    }
  }

  public static void setupUsername() {
    git("config user.name '" + USER_NAME + "'");
    git("config user.email '" + USER_EMAIL + "'");
  }

  /**
   * Creates a Git repository in the given root directory;
   * registers it in the Settings;
   * return the {@link GitRepository} object for this newly created repository.
   */
  @NotNull
  public static GitRepository createRepository(@NotNull Project project, @NotNull String root) {
    return createRepository(project, root, true);
  }

  public static GitRepository createRepository(@NotNull Project project, @NotNull String root, boolean makeInitialCommit) {
    initRepo(root, makeInitialCommit);
    return registerRepo(project, root);
  }

  @NotNull
  public static GitRepository registerRepo(Project project, String root) {
    ProjectLevelVcsManagerImpl vcsManager = (ProjectLevelVcsManagerImpl)ProjectLevelVcsManager.getInstance(project);
    vcsManager.setDirectoryMapping(root, GitVcs.NAME);
    VirtualFile file = LocalFileSystem.getInstance().findFileByIoFile(new File(root));
    GitRepository repository = GitUtil.getRepositoryManager(project).getRepositoryForRoot(file);
    assertNotNull("Couldn't find repository for root " + root, repository);
    return repository;
  }

  /**
   * Default port will be occupied by main idea instance => define the custom default to avoid searching of free port
   */
  public static void setDefaultBuiltInServerPort() {
    System.setProperty(BuiltInServerManagerImpl.PROPERTY_RPC_PORT, "64463");
  }

  public static void assumeSupportedGitVersion(@NotNull GitVcs vcs) {
    assumeTrue(vcs.getVersion().isSupported());
  }
}