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Viewing changes to contrib/NGit/NGit/RefWriter.cs

  • Committer: Bazaar Package Importer
  • Author(s): Jo Shields
  • Date: 2011-06-27 17:03:13 UTC
  • mto: (1.8.1 upstream)
  • mto: This revision was merged to the branch mainline in revision 54.
  • Revision ID: james.westby@ubuntu.com-20110627170313-6cvz3s19x6e9hqe9
Import upstream version 2.5.92+dfsg

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contrib/NGit/NGit/RefWriter.cs
 
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/*
 
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This code is derived from jgit (http://eclipse.org/jgit).
 
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Copyright owners are documented in jgit's IP log.
 
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This program and the accompanying materials are made available
 
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under the terms of the Eclipse Distribution License v1.0 which
 
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accompanies this distribution, is reproduced below, and is
 
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available at http://www.eclipse.org/org/documents/edl-v10.php
 
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All rights reserved.
 
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Redistribution and use in source and binary forms, with or
 
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without modification, are permitted provided that the following
 
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conditions are met:
 
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- Redistributions of source code must retain the above copyright
 
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  notice, this list of conditions and the following disclaimer.
 
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- Redistributions in binary form must reproduce the above
 
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  copyright notice, this list of conditions and the following
 
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  disclaimer in the documentation and/or other materials provided
 
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  with the distribution.
 
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- Neither the name of the Eclipse Foundation, Inc. nor the
 
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  names of its contributors may be used to endorse or promote
 
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  products derived from this software without specific prior
 
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  written permission.
 
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
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*/
 
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using System.Collections.Generic;
 
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using System.IO;
 
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using NGit;
 
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using NGit.Storage.File;
 
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using NGit.Util;
 
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using Sharpen;
 
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namespace NGit
 
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{
 
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        /// <summary>
 
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        /// Writes out refs to the
 
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        /// <see cref="Constants.INFO_REFS">Constants.INFO_REFS</see>
 
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        /// and
 
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        /// <see cref="Constants.PACKED_REFS">Constants.PACKED_REFS</see>
 
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        /// files.
 
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        /// This class is abstract as the writing of the files must be handled by the
 
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        /// caller. This is because it is used by transport classes as well.
 
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        /// </summary>
 
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        public abstract class RefWriter
 
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        {
 
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                private readonly ICollection<Ref> refs;
 
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                /// <param name="refs">
 
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                /// the complete set of references. This should have been computed
 
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                /// by applying updates to the advertised refs already discovered.
 
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                /// </param>
 
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                public RefWriter(ICollection<Ref> refs)
 
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                {
 
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                        this.refs = RefComparator.Sort(refs);
 
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                }
 
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                /// <param name="refs">
 
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                /// the complete set of references. This should have been computed
 
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                /// by applying updates to the advertised refs already discovered.
 
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                /// </param>
 
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                public RefWriter(IDictionary<string, Ref> refs)
 
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                {
 
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                        if (refs is RefMap)
 
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                        {
 
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                                this.refs = refs.Values;
 
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                        }
 
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                        else
 
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                        {
 
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                                this.refs = RefComparator.Sort(refs.Values);
 
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                        }
 
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                }
 
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                /// <param name="refs">
 
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                /// the complete set of references. This should have been computed
 
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                /// by applying updates to the advertised refs already discovered.
 
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                /// </param>
 
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                public RefWriter(RefList<Ref> refs)
 
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                {
 
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                        this.refs = refs.AsList();
 
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                }
 
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                /// <summary>
 
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                /// Rebuild the
 
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                /// <see cref="Constants.INFO_REFS">Constants.INFO_REFS</see>
 
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                /// .
 
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                /// <p>
 
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                /// This method rebuilds the contents of the
 
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                /// <see cref="Constants.INFO_REFS">Constants.INFO_REFS</see>
 
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                /// file
 
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                /// to match the passed list of references.
 
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                /// </summary>
 
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                /// <exception cref="System.IO.IOException">
 
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                /// writing is not supported, or attempting to write the file
 
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                /// failed, possibly due to permissions or remote disk full, etc.
 
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                /// </exception>
 
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                public virtual void WriteInfoRefs()
 
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                {
 
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                        StringWriter w = new StringWriter();
 
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                        char[] tmp = new char[Constants.OBJECT_ID_STRING_LENGTH];
 
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                        foreach (Ref r in refs)
 
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                        {
 
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                                if (Constants.HEAD.Equals(r.GetName()))
 
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                                {
 
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                                        // Historically HEAD has never been published through
 
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                                        // the INFO_REFS file. This is a mistake, but its the
 
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                                        // way things are.
 
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                                        //
 
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                                        continue;
 
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                                }
 
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                                r.GetObjectId().CopyTo(tmp, w);
 
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                                w.Write('\t');
 
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                                w.Write(r.GetName());
 
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                                w.Write('\n');
 
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                                if (r.GetPeeledObjectId() != null)
 
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                                {
 
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                                        r.GetPeeledObjectId().CopyTo(tmp, w);
 
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                                        w.Write('\t');
 
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                                        w.Write(r.GetName());
 
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                                        w.Write("^{}\n");
 
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                                }
 
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                        }
 
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                        WriteFile(Constants.INFO_REFS, Constants.Encode(w.ToString()));
 
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                }
 
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                /// <summary>
 
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                /// Rebuild the
 
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                /// <see cref="Constants.PACKED_REFS">Constants.PACKED_REFS</see>
 
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                /// file.
 
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                /// <p>
 
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                /// This method rebuilds the contents of the
 
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                /// <see cref="Constants.PACKED_REFS">Constants.PACKED_REFS</see>
 
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                /// file to match the passed list of references, including only those refs
 
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                /// that have a storage type of
 
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                /// <see cref="RefStorage.PACKED">RefStorage.PACKED</see>
 
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                /// .
 
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                /// </summary>
 
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                /// <exception cref="System.IO.IOException">
 
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                /// writing is not supported, or attempting to write the file
 
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                /// failed, possibly due to permissions or remote disk full, etc.
 
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                /// </exception>
 
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                public virtual void WritePackedRefs()
 
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                {
 
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                        bool peeled = false;
 
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                        foreach (Ref r in refs)
 
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                        {
 
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                                if (r.GetStorage().IsPacked() && r.IsPeeled())
 
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                                {
 
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                                        peeled = true;
 
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                                        break;
 
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                                }
 
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                        }
 
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                        StringWriter w = new StringWriter();
 
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                        if (peeled)
 
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                        {
 
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                                w.Write(RefDirectory.PACKED_REFS_HEADER);
 
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                                if (peeled)
 
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                                {
 
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                                        w.Write(RefDirectory.PACKED_REFS_PEELED);
 
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                                }
 
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                                w.Write('\n');
 
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                        }
 
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                        char[] tmp = new char[Constants.OBJECT_ID_STRING_LENGTH];
 
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                        foreach (Ref r_1 in refs)
 
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                        {
 
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                                if (r_1.GetStorage() != RefStorage.PACKED)
 
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                                {
 
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                                        continue;
 
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                                }
 
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                                r_1.GetObjectId().CopyTo(tmp, w);
 
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                                w.Write(' ');
 
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                                w.Write(r_1.GetName());
 
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                                w.Write('\n');
 
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                                if (r_1.GetPeeledObjectId() != null)
 
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                                {
 
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                                        w.Write('^');
 
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                                        r_1.GetPeeledObjectId().CopyTo(tmp, w);
 
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                                        w.Write('\n');
 
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                                }
 
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                        }
 
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                        WriteFile(Constants.PACKED_REFS, Constants.Encode(w.ToString()));
 
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                }
 
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                /// <summary>
 
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                /// Handles actual writing of ref files to the git repository, which may
 
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                /// differ slightly depending on the destination and transport.
 
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                /// </summary>
 
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                /// <remarks>
 
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                /// Handles actual writing of ref files to the git repository, which may
 
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                /// differ slightly depending on the destination and transport.
 
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                /// </remarks>
 
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                /// <param name="file">path to ref file.</param>
 
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                /// <param name="content">byte content of file to be written.</param>
 
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                /// <exception cref="System.IO.IOException">System.IO.IOException</exception>
 
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                protected internal abstract void WriteFile(string file, byte[] content);
 
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        }
 
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}