private void AddLine(string line)
{
string content = DiffLineHelper.GetContent(line);
current.Changes.Add(new LineDiff(type: LineChangeType.Add, index: inAdd++, content: content));
file.Additions++;
}
private void ParseNormalLine(string line)
{
if (file == null ||
string.IsNullOrEmpty(line) ||
current == null)
{
return;
}
string content = DiffLineHelper.GetContent(line);
current.Changes.Add(new LineDiff(
oldIndex: line == Noeol ? 0 : inDel++,
newIndex: line == Noeol ? 0 : inAdd++,
content: content));
}
public static IEnumerable <FileDiff> Parse(string input, string lineEnding = "\n")
{
var lines = StringHelper.SplitLines(input, lineEnding).ToList();
if (!lines.Any())
{
return(Enumerable.Empty <FileDiff>());
}
var files = new List <FileDiff>();
var inDel = 0;
var inAdd = 0;
Chunk current = null;
FileDiff file = null;
int oldStart, newStart;
int oldLines, newLines;
ParserAction start = (line, m) =>
{
file = new FileDiff();
files.Add(file);
if (file.To == null && file.From == null)
{
var fileNames = ParseFile(line);
if (fileNames != null)
{
file.From = fileNames[0];
file.To = fileNames[1];
}
}
};
ParserAction restart = (line, m) =>
{
if (file == null || file.Chunks.Count != 0)
{
start(null, null);
}
};
ParserAction new_file = (line, m) =>
{
restart(null, null);
file.Type = FileChangeType.Add;
file.From = "/dev/null";
};
ParserAction deleted_file = (line, m) =>
{
restart(null, null);
file.Type = FileChangeType.Delete;
file.To = "/dev/null";
};
ParserAction index = (line, m) =>
{
restart(null, null);
file.Index = line.Split(' ').Skip(1);
};
ParserAction from_file = (line, m) =>
{
restart(null, null);
file.From = ParseFileFallback(line);
};
ParserAction to_file = (line, m) =>
{
restart(null, null);
file.To = ParseFileFallback(line);
};
ParserAction chunk = (line, match) =>
{
inDel = oldStart = int.Parse(match.Groups[1].Value);
oldLines = match.Groups[2].Success ? int.Parse(match.Groups[2].Value) : 0;
inAdd = newStart = int.Parse(match.Groups[3].Value);
newLines = match.Groups[4].Success ? int.Parse(match.Groups[4].Value) : 0;
ChunkRangeInfo rangeInfo = new ChunkRangeInfo(
new ChunkRange(oldStart, oldLines),
new ChunkRange(newStart, newLines));
current = new Chunk(line, rangeInfo);
file.Chunks.Add(current);
};
ParserAction del = (line, match) =>
{
string content = DiffLineHelper.GetContent(line);
current.Changes.Add(new LineDiff(type: LineChangeType.Delete, index: inDel++, content: content));
file.Deletions++;
};
ParserAction add = (line, m) =>
{
string content = DiffLineHelper.GetContent(line);
current.Changes.Add(new LineDiff(type: LineChangeType.Add, index: inAdd++, content: content));
file.Additions++;
};
const string noeol = "\\ No newline at end of file";
Action <string> normal = line =>
{
if (file == null)
{
return;
}
string content = DiffLineHelper.GetContent(line);
current.Changes.Add(new LineDiff(
oldIndex: line == noeol ? 0 : inDel++,
newIndex: line == noeol ? 0 : inAdd++,
content: content));
};
var schema = new Dictionary <Regex, ParserAction>
{
{ new Regex(@"^diff\s"), start },
{ new Regex(@"^new file mode \d+$"), new_file },
{ new Regex(@"^deleted file mode \d+$"), deleted_file },
{ new Regex(@"^index\s[\da-zA-Z]+\.\.[\da-zA-Z]+(\s(\d+))?$"), index },
{ new Regex(@"^---\s"), from_file },
{ new Regex(@"^\+\+\+\s"), to_file },
{ new Regex(@"^@@\s+\-(\d+),?(\d+)?\s+\+(\d+),?(\d+)?\s@@"), chunk },
{ new Regex(@"^-"), del },
{ new Regex(@"^\+"), add }
};
Func <string, bool> parse = line =>
{
foreach (var p in schema)
{
var m = p.Key.Match(line);
if (m.Success)
{
p.Value(line, m);
return(true);
}
}
return(false);
};
foreach (var line in lines)
{
if (!parse(line))
{
normal(line);
}
}
return(files);
}
