void createDeltaForSingleFile(FileInfo targetFile, DirectoryInfo workingDirectory, Dictionary<string, string> baseFileListing)
{
// NB: There are three cases here that we'll handle:
//
// 1. Exists only in new => leave it alone, we'll use it directly.
// 2. Exists in both old and new => write a dummy file so we know
// to keep it.
// 3. Exists in old but changed in new => create a delta file
//
// The fourth case of "Exists only in old => delete it in new"
// is handled when we apply the delta package
var relativePath = targetFile.FullName.Replace(workingDirectory.FullName, "");
if (!baseFileListing.ContainsKey(relativePath)) {
this.Log().Info("{0} not found in base package, marking as new", relativePath);
return;
}
var oldData = File.ReadAllBytes(baseFileListing[relativePath]);
var newData = File.ReadAllBytes(targetFile.FullName);
if (bytesAreIdentical(oldData, newData)) {
this.Log().Info("{0} hasn't changed, writing dummy file", relativePath);
File.Create(targetFile.FullName + ".diff").Dispose();
File.Create(targetFile.FullName + ".shasum").Dispose();
targetFile.Delete();
return;
}
this.Log().Info("Delta patching {0} => {1}", baseFileListing[relativePath], targetFile.FullName);
var msDelta = new MsDeltaCompression();
try {
msDelta.CreateDelta(baseFileListing[relativePath], targetFile.FullName, targetFile.FullName + ".diff");
} catch (Exception) {
this.Log().Warn("We couldn't create a delta for {0}, attempting to create bsdiff", targetFile.Name);
var of = default(FileStream);
try {
of = File.Create(targetFile.FullName + ".bsdiff");
BinaryPatchUtility.Create(oldData, newData, of);
// NB: Create a dummy corrupt .diff file so that older
// versions which don't understand bsdiff will fail out
// until they get upgraded, instead of seeing the missing
// file and just removing it.
File.WriteAllText(targetFile.FullName + ".diff", "1");
} catch (Exception ex) {
this.Log().WarnException(String.Format("We really couldn't create a delta for {0}", targetFile.Name), ex);
return;
} finally {
if (of != null) of.Dispose();
}
}
var rl = ReleaseEntry.GenerateFromFile(new MemoryStream(newData), targetFile.Name + ".shasum");
File.WriteAllText(targetFile.FullName + ".shasum", rl.EntryAsString, Encoding.UTF8);
targetFile.Delete();
}
void createDeltaForSingleFile(FileInfo targetFile, DirectoryInfo workingDirectory, Dictionary<string, string> baseFileListing)
{
// NB: There are three cases here that we'll handle:
//
// 1. Exists only in new => leave it alone, we'll use it directly.
// 2. Exists in both old and new => write a dummy file so we know
// to keep it.
// 3. Exists in old but changed in new => create a delta file
//
// The fourth case of "Exists only in old => delete it in new"
// is handled when we apply the delta package
var relativePath = targetFile.FullName.Replace(workingDirectory.FullName, "");
if (!baseFileListing.ContainsKey(relativePath)) {
this.Log().Info("{0} not found in base package, marking as new", relativePath);
return;
}
var oldData = File.ReadAllBytes(baseFileListing[relativePath]);
var newData = File.ReadAllBytes(targetFile.FullName);
if (bytesAreIdentical(oldData, newData)) {
this.Log().Info("{0} hasn't changed, writing dummy file", relativePath);
File.Create(targetFile.FullName + ".diff").Dispose();
File.Create(targetFile.FullName + ".shasum").Dispose();
targetFile.Delete();
return;
}
this.Log().Info("Delta patching {0} => {1}", baseFileListing[relativePath], targetFile.FullName);
var msDelta = new MsDeltaCompression();
try {
msDelta.CreateDelta(baseFileListing[relativePath], targetFile.FullName, targetFile.FullName + ".diff");
} catch (Win32Exception ex) {
this.Log().Warn("We couldn't create a delta for {0}, writing full file", targetFile.Name);
return;
}
var rl = ReleaseEntry.GenerateFromFile(new MemoryStream(newData), targetFile.Name + ".shasum");
File.WriteAllText(targetFile.FullName + ".shasum", rl.EntryAsString, Encoding.UTF8);
targetFile.Delete();
}
