/*
    * Copyright (C) 2013, Matthias Sohn <matthias.sohn@sap.com> and others
    *
    * This program and the accompanying materials are made available under the
    * terms of the Eclipse Distribution License v. 1.0 which is available at
    * https://www.eclipse.org/org/documents/edl-v10.php.
    *
    * SPDX-License-Identifier: BSD-3-Clause
    */
  package org.eclipse.jgit.pgm;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.eclipse.jgit.api.DescribeCommand;
  import org.eclipse.jgit.api.Git;
  import org.eclipse.jgit.api.errors.GitAPIException;
  import org.eclipse.jgit.api.errors.RefNotFoundException;
  import org.eclipse.jgit.errors.InvalidPatternException;
  import org.eclipse.jgit.lib.ObjectId;
  import org.eclipse.jgit.pgm.internal.CLIText;
  import org.kohsuke.args4j.Argument;
  import org.kohsuke.args4j.Option;
  
  @Command(common = true, usage = "usage_Describe")
  class Describe extends TextBuiltin {
  
  	@Argument(index = 0, metaVar = "metaVar_treeish")
  	private ObjectId tree;
  
  	@Option(name = "--long", usage = "usage_LongFormat")
  	private boolean longDesc;
  
  	@Option(name = "--tags", usage = "usage_UseTags")
  	private boolean useTags;
  
  	@Option(name = "--always", usage = "usage_AlwaysFallback")
  	private boolean always;
  
  	@Option(name = "--match", usage = "usage_Match", metaVar = "metaVar_pattern")
  	private List<String> patterns = new ArrayList<>();
  
  	/** {@inheritDoc} */
  	@Override
  	protected void run() {
  		try (Gitit.html#Git">Git git = new Git(db)) {
  			DescribeCommand cmd = git.describe();
  			if (tree != null) {
  				cmd.setTarget(tree);
  			}
  			cmd.setLong(longDesc);
  			cmd.setTags(useTags);
  			cmd.setAlways(always);
  			cmd.setMatch(patterns.toArray(new String[0]));
  			String result = null;
  			try {
  				result = cmd.call();
  			} catch (RefNotFoundException e) {
  				throw die(CLIText.get().noNamesFound, e);
  			}
  			if (result == null) {
  				throw die(CLIText.get().noNamesFound);
  			}
  
  			outw.println(result);
  		} catch (IOException | InvalidPatternException | GitAPIException e) {
  			throw die(e.getMessage(), e);
  		}
  	}
  }