diff options
author | yorah <yoram.harmelin@gmail.com> | 2013-01-11 19:42:42 +0400 |
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committer | yorah <yoram.harmelin@gmail.com> | 2013-12-13 17:26:41 +0400 |
commit | 36d40bd80e858004c3c8b92553082e3ceca4cf46 (patch) | |
tree | fcb428288a08894ae4b7264a386bbb237d851e71 /LibGit2Sharp/TarArchiver.cs | |
parent | f2d5b19c35d703738d406d48e6c63b679246513d (diff) |
Add archive as tar functionality
Implemented as an extension method of `ObjectDatabase`.
Lots of logic taken from [archive-tar.c](https://github.com/git/git/blob/master/archive-tar.c).
Diffstat (limited to 'LibGit2Sharp/TarArchiver.cs')
-rw-r--r-- | LibGit2Sharp/TarArchiver.cs | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/LibGit2Sharp/TarArchiver.cs b/LibGit2Sharp/TarArchiver.cs new file mode 100644 index 00000000..f6fe7520 --- /dev/null +++ b/LibGit2Sharp/TarArchiver.cs @@ -0,0 +1,88 @@ +using System; +using System.IO; +using System.Text; +using LibGit2Sharp.Core; + +namespace LibGit2Sharp +{ + /// <summary> + /// Logic for tar archiving (not the actual tar format, but the overal logic related to tar+git) is taken + /// from https://github.com/git/git/blob/master/archive-tar.c. + /// </summary> + internal class TarArchiver : ArchiverBase, IDisposable + { + private readonly TarWriter writer; + + public TarArchiver(FileStream output) + { + writer = new TarWriter(output); + } + + #region Overrides of ArchiverBase + + public override void BeforeArchiving(Tree tree, ObjectId oid, DateTimeOffset modificationTime) + { + if (oid == null) + { + return; + } + + // Store the sha in the pax_global_header + using (var stream = new MemoryStream(Encoding.ASCII.GetBytes(string.Format("52 comment={0}\n", oid.Sha)))) + { + writer.Write("pax_global_header", stream, modificationTime, "666".OctalToInt32(), + "0", "0", 'g', "root", "root", "0", "0", oid.Sha, false); + } + } + + protected override void AddTreeEntry(string path, TreeEntry entry, DateTimeOffset modificationTime) + { + switch (entry.Mode) + { + case Mode.GitLink: + case Mode.Directory: + writer.Write(path + "/", null, modificationTime, "775".OctalToInt32(), + "0", "0", '5', "root", "root", "0", "0", entry.TargetId.Sha, false); + break; + case Mode.ExecutableFile: + case Mode.NonExecutableFile: + case Mode.NonExecutableGroupWritableFile: + var blob = ((Blob) entry.Target); + + WriteStream(path, entry, modificationTime, + () => blob.IsBinary ? blob.GetContentStream() : blob.GetContentStream(new FilteringOptions(path))); + break; + case Mode.SymbolicLink: + using (Stream contentStream = ((Blob)entry.Target).GetContentStream(new FilteringOptions(path))) + { + writer.Write(path, contentStream, modificationTime, "777".OctalToInt32(), + "0", "0", '2', "root", "root", "0", "0", entry.TargetId.Sha, true); + } + break; + default: + throw new InvalidOperationException(string.Format("Unsupported file mode: {0} (sha1: {1}).", entry.Mode, entry.TargetId.Sha)); + } + } + + private void WriteStream(string path, TreeEntry entry, DateTimeOffset modificationTime, Func<Stream> streamer) + { + using (Stream contentStream = streamer()) + { + writer.Write(path, contentStream, modificationTime, + (entry.Mode == Mode.ExecutableFile) ? "775".OctalToInt32() : "664".OctalToInt32(), + "0", "0", '0', "root", "root", "0", "0", entry.TargetId.Sha, false); + } + } + + #endregion + + #region Implementation of IDisposable + + public void Dispose() + { + writer.Dispose(); + } + + #endregion + } +} |