internal static Diff NewFileDiff(string content, string path)
{
var fileOne = new NullFile();
var fileTwo = new File('b', path);
var header = new DiffHeader(new DiffFormatType("generated"), new IFile[] { fileOne, fileTwo });
var lines = content.SplitIntoLines()
.Select(x => (ILine)new AdditionLine(x));
var range = new ChunkRange(new ChangeRange(0, 0), new ChangeRange(1, lines.Count()));
var snippet = new AdditionSnippet(lines);
var chunk = new Chunk(range, new[] { snippet });
return new Diff(header, new IHeader[0], new ChunksHeader(fileOne, fileTwo), new[] { chunk });
}
public IList<IFile> GetDiffFilesFromBinaryFiles(string binaryFilesRawFileDefs)
{
List<IFile> files = new List<IFile>(2);
string rawFileDefs = binaryFilesRawFileDefs;
// rawFileDefs has the following format:
// '<file def> and <file def> differ'
// See IsValidFileDef for valid values of <file def>.
// 1. remove ' differ' from the end
int index = rawFileDefs.IndexOf(" differ");
if(index != -1) {
rawFileDefs = rawFileDefs.Substring(0, index);
} else {
System.Diagnostics.Trace.TraceWarning("Missing string ' differ' at end of BinaryFiles raw line: '{0}'", binaryFilesRawFileDefs);
}
// 2. repeatedly split at ' and ' positions, and find the ones where we have valid file names
var candidates = new List<KeyValuePair<string, string>>(1);
index = 0;
while(true) {
index = rawFileDefs.IndexOf(" and ", index);
if(index == -1) break;
string filename1 = rawFileDefs.Substring(0, index);
string filename2 = rawFileDefs.Substring(index + 5 /* " and ".Length */);
if(AreValidFileDefs(filename1, filename2)) {
candidates.Add(new KeyValuePair<string, string>(filename1, filename2));
}
}
// 3. find the right candidate
if(candidates.Count == 0) {
System.Diagnostics.Trace.TraceWarning("Missing file names in BinaryFiles raw line '{0}'", binaryFilesRawFileDefs);
} else if(candidates.Count == 1) {
files[0] = FileFromFileDef(candidates[0].Key);
files[1] = FileFromFileDef(candidates[0].Value);
} else {
// We got at least one file name with ' and b/' or ' and /dev/null' in its path ...
// We can consult the diff header's raw string, which looks like this:
// '<file def> <file def>'
// Try to find a matching pair of candidates.
foreach(var candidate in candidates) {
if(this.headerSplitCandidates.Any(headerCandidate => CandidatesMatch(candidate.Key, headerCandidate.Key, candidate.Value, headerCandidate.Value))) {
files[0] = FileFromFileDef(candidate.Key);
files[1] = FileFromFileDef(candidate.Value);
break;
}
}
if(files.Count < 2) {
System.Diagnostics.Trace.TraceWarning("Could not find any pair of file names in BinaryFiles header that match the diff header file names.");
}
}
// 4. check if we found anything, and choose a default if not
if(files.Count < 2) {
if(candidates.Count > 0) {
System.Diagnostics.Trace.TraceWarning("Defaulting to first candidate.");
files[0] = FileFromFileDef(candidates[0].Key);
files[1] = FileFromFileDef(candidates[0].Value);
} else {
System.Diagnostics.Trace.TraceWarning("Defaulting to NullFiles.");
files[0] = new NullFile();
files[1] = new NullFile();
}
}
return files;
}
