private static Patch CreatePatchFromString([ItemNotNull, NotNull] string[] lines, [NotNull] Lazy <Encoding> filesContentEncoding, ref int lineIndex)
{
if (lineIndex >= lines.Length)
{
return(null);
}
string header = lines[lineIndex];
var headerMatch = _patchHeaderRegex.Match(header);
if (!headerMatch.Success)
{
return(null);
}
header = VsrModule.ReEncodeFileNameFromLossless(header);
var state = PatchProcessorState.InHeader;
string fileNameA, fileNameB;
var isCombinedDiff = headerMatch.Groups["type"].Value != "git";
if (!isCombinedDiff)
{
// diff --git a/GitCommands/CommitInformationTest.cs b/GitCommands/CommitInformationTest.cs
// diff --git b/Benchmarks/App.config a/Benchmarks/App.config
Match match = Regex.Match(header, "^diff --git [\\\"]?[abiwco12]/(.*)[\\\"]? [\\\"]?[abiwco12]/(.*)[\\\"]?$");
if (!match.Success)
{
throw new FormatException("Invalid patch header: " + header);
}
fileNameA = match.Groups[1].Value.Trim();
fileNameB = match.Groups[2].Value.Trim();
}
else
{
Match match = Regex.Match(header, "^diff --(cc|combined) [\\\"]?(?<filenamea>.*)[\\\"]?$");
if (!match.Success)
{
throw new FormatException("Invalid patch header: " + header);
}
fileNameA = match.Groups["filenamea"].Value.Trim();
fileNameB = null;
}
string index = null;
var changeType = PatchChangeType.ChangeFile;
var fileType = PatchFileType.Text;
var patchText = new StringBuilder();
patchText.Append(header);
if (lineIndex < lines.Length - 1)
{
patchText.Append("\n");
}
var done = false;
var i = lineIndex + 1;
for (; i < lines.Length; i++)
{
var line = lines[i];
if (IsStartOfANewPatch(line))
{
lineIndex = i - 1;
done = true;
break;
}
if (line.StartsWith("@@"))
{
// Starting a new chunk
state = PatchProcessorState.InBody;
break;
}
// header lines are encoded in VsrModule.SystemEncoding
line = VsrModule.ReEncodeStringFromLossless(line, VsrModule.SystemEncoding);
if (line.StartsWith("index "))
{
// Index line
index = line;
patchText.Append(line);
if (i < lines.Length - 1)
{
patchText.Append("\n");
}
continue;
}
if (line.StartsWith("new file mode "))
{
changeType = PatchChangeType.NewFile;
}
else if (line.StartsWith("deleted file mode "))
{
changeType = PatchChangeType.DeleteFile;
}
else if (line.StartsWith("old mode "))
{
changeType = PatchChangeType.ChangeFileMode;
}
else if (line.StartsWith("Binary files a/") && line.EndsWith(" and /dev/null differ"))
{
// Unlisted binary file deletion
if (changeType != PatchChangeType.DeleteFile)
{
throw new FormatException("Change not parsed correctly: " + line);
}
fileType = PatchFileType.Binary;
state = PatchProcessorState.OutsidePatch;
break;
}
else if (line.StartsWith("Binary files /dev/null and b/") && line.EndsWith(" differ"))
{
// Unlisted binary file addition
if (changeType != PatchChangeType.NewFile)
{
throw new FormatException("Change not parsed correctly: " + line);
}
fileType = PatchFileType.Binary;
state = PatchProcessorState.OutsidePatch;
break;
}
else if (line.StartsWith("GIT binary patch"))
{
fileType = PatchFileType.Binary;
state = PatchProcessorState.OutsidePatch;
break;
}
if (line.StartsWith("--- /dev/null"))
{
// there is no old file, so this should be a new file
if (changeType != PatchChangeType.NewFile)
{
throw new FormatException("Change not parsed correctly: " + line);
}
}
else if (line.StartsWith("--- "))
{
// old file name
line = VsrModule.UnescapeOctalCodePoints(line);
Match regexMatch = Regex.Match(line, "[-]{3} [\\\"]?[abiwco12]/(.*)[\\\"]?");
if (regexMatch.Success)
{
fileNameA = regexMatch.Groups[1].Value.Trim();
}
else
{
throw new FormatException("Old filename not parsed correctly: " + line);
}
}
else if (line.StartsWith("+++ /dev/null"))
{
// there is no new file, so this should be a deleted file
if (changeType != PatchChangeType.DeleteFile)
{
throw new FormatException("Change not parsed correctly: " + line);
}
}
else if (line.StartsWith("+++ "))
{
// new file name
line = VsrModule.UnescapeOctalCodePoints(line);
Match regexMatch = Regex.Match(line, "[+]{3} [\\\"]?[abiwco12]/(.*)[\\\"]?");
if (regexMatch.Success)
{
fileNameB = regexMatch.Groups[1].Value.Trim();
}
else
{
throw new FormatException("New filename not parsed correctly: " + line);
}
}
patchText.Append(line);
if (i < lines.Length - 1)
{
patchText.Append("\n");
}
}
// process patch body
for (; !done && i < lines.Length; i++)
{
var line = lines[i];
if (IsStartOfANewPatch(line))
{
lineIndex = i - 1;
break;
}
if (state == PatchProcessorState.InBody && line.StartsWithAny(new[] { " ", "-", "+", "@" }))
{
// diff content
line = VsrModule.ReEncodeStringFromLossless(line, filesContentEncoding.Value);
}
else
{
// warnings, messages ...
line = VsrModule.ReEncodeStringFromLossless(line, VsrModule.SystemEncoding);
}
if (i < lines.Length - 1)
{
line += "\n";
}
patchText.Append(line);
}
lineIndex = i - 1;
return(new Patch(header, index, fileType, fileNameA, fileNameB, isCombinedDiff, changeType, patchText.ToString()));
}