/*
    * Copyright (C) 2010, Google Inc.
    * Copyright (C) 2008, Jonas Fonseca <fonseca@diku.dk>
    * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org> 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.List;
  
  import org.eclipse.jgit.lib.AnyObjectId;
  import org.eclipse.jgit.lib.Ref;
  import org.eclipse.jgit.lib.RefComparator;
  
  @Command(usage = "usage_ShowRef")
  class ShowRef extends TextBuiltin {
  	/** {@inheritDoc} */
  	@Override
  	protected void run() {
  		try {
  			for (Ref r : getSortedRefs()) {
  				show(r.getObjectId(), r.getName());
  				if (r.getPeeledObjectId() != null) {
  					show(r.getPeeledObjectId(), r.getName() + "^{}"); //$NON-NLS-1$
  				}
  			}
  		} catch (IOException e) {
  			throw die(e.getMessage(), e);
  		}
  	}
  
  	private Iterable<Ref> getSortedRefs() throws IOException {
  		List<Ref> all = db.getRefDatabase().getRefs();
  		// TODO(jrn) check if we can reintroduce fast-path by e.g. implementing
  		// SortedList
  		return RefComparator.sort(all);
  	}
  
  	private void show(AnyObjectId id, String name)
  			throws IOException {
  		outw.print(id.name());
  		outw.print('\t');
  		outw.print(name);
  		outw.println();
  	}
  }