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Make GIT_DIFF_SHOW_BINARY flag settable by users through CompareOptions #1967

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56 changes: 56 additions & 0 deletions LibGit2Sharp.Tests/DiffTreeToTreeFixture.cs
Original file line number Diff line number Diff line change
Expand Up @@ -148,6 +148,62 @@ public void CanDetectABinaryDeletion()
}
}

[Fact]
public void CanProvideBinaryDeflateDeltaInfo()
{
using (var repo = new Repository(SandboxStandardTestRepo()))
{
const string filename = "newBin.file";
var filepath = Path.Combine(repo.Info.WorkingDirectory, filename);

CreateBinaryFile(filepath);

var compareOptions = new CompareOptions();
compareOptions.ShowBinary = true;
using (Patch patch = repo.Diff.Compare<Patch>(repo.Commits.FirstOrDefault().Tree, DiffTargets.WorkingDirectory, null, null, compareOptions))
{
var withBinaryDeltaDiff = new StringBuilder()
.Append("diff --git a/newBin.file b/newBin.file\n")
.Append("new file mode 100644\n")
.Append("index 0000000000000000000000000000000000000000..689732707188cb8aedfe69d84c9536fd5655d814\n")
.Append("GIT binary patch\n")
.Append("literal 4000\n")
.Append("dc%1FSF%19!3<IEc{zX^D9!O{|RaI40Uk|E93%LLQ\n\n")
.Append("literal 0\n")
.Append("Hc$@<O00001");

Assert.True(patch[filename].IsBinaryComparison);
Assert.Contains(withBinaryDeltaDiff.ToString(), patch[filename].Patch.Trim());
}

}
}

[Fact]
public void DoesNotProvideBinaryDeflateDeltaInfoByDefault()
{
using (var repo = new Repository(SandboxStandardTestRepo()))
{
const string filename = "newBin.file";
var filepath = Path.Combine(repo.Info.WorkingDirectory, filename);

CreateBinaryFile(filepath);

var compareOptions = new CompareOptions();
using (Patch patch = repo.Diff.Compare<Patch>(repo.Commits.FirstOrDefault().Tree, DiffTargets.WorkingDirectory, null, null, compareOptions))
{
var noBinaryDeltaDiff = new StringBuilder()
.Append("diff --git a/newBin.file b/newBin.file\n")
.Append("new file mode 100644\n")
.Append("index 0000000..6897327\n")
.Append("Binary files /dev/null and b/newBin.file differ");

Assert.True(patch[filename].IsBinaryComparison);
Assert.Equal(noBinaryDeltaDiff.ToString(), patch[filename].Patch.Trim());
}
}
}

/*
* $ git diff 9fd738e..HEAD -- "1" "2/"
* diff --git a/1/branch_file.txt b/1/branch_file.txt
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6 changes: 6 additions & 0 deletions LibGit2Sharp/CompareOptions.cs
Original file line number Diff line number Diff line change
Expand Up @@ -50,5 +50,11 @@ public CompareOptions()
/// By default, this option will be false.
/// </summary>
public bool IndentHeuristic { get; set; }

/// <summary>
/// Include the necessary deflate / delta information so that `git-apply`
/// can apply given diff information to binary files.
/// </summary>
public bool ShowBinary { get; set; }
}
}
5 changes: 5 additions & 0 deletions LibGit2Sharp/Diff.cs
Original file line number Diff line number Diff line change
Expand Up @@ -63,6 +63,11 @@ private static GitDiffOptions BuildOptions(DiffModifiers diffOptions, FilePath[]
options.Flags |= GitDiffOptionFlags.GIT_DIFF_DISABLE_PATHSPEC_MATCH;
}

if (compareOptions.ShowBinary)
{
options.Flags |= GitDiffOptionFlags.GIT_DIFF_SHOW_BINARY;
}

if (compareOptions.IndentHeuristic)
{
options.Flags |= GitDiffOptionFlags.GIT_DIFF_INDENT_HEURISTIC;
Expand Down