public override void Hotload(List <string> changedFiles)
{
// TODO smarter hotloading. Handle removed files.
var loadedFileNames = new HashSet <string>(AllFiles.Keys);
foreach (string file in FindConfigsInBaseDir())
{
string fileName = GetFileNameFromPath(file);
loadedFileNames.Remove(fileName);
if (!AllFiles.TryGetValue(fileName, out var fileInfo))
{
// New file, add it.
var newFileInfo = ReadFile(file);
AllFiles.Add(newFileInfo.Name, newFileInfo);
changedFiles.Add(newFileInfo.Name);
continue;
}
var fileSize = new FileInfo(file).Length;
var modified = File.GetLastWriteTimeUtc(file);
// Timestamp or size need to differ before we bother generating a checksum of the file.
// Timestamps are considered different if there's at least 1 second between them.
if (fileSize == fileInfo.Size && Math.Abs((modified - fileInfo.Modified).TotalSeconds) < 1f)
{
continue;
}
using (var fileStream = File.OpenRead(file)) {
int checksum = Internal.ChecksumUtils.Checksum(fileStream);
fileStream.Seek(0, SeekOrigin.Begin);
// Update the modified timestamp and file size even if the checksum is the same.
// Because we didn't early out a few lines above, we know that at least one of these values
// is stale.
fileInfo.Modified = modified;
fileInfo.Size = fileSize;
if (checksum == fileInfo.Checksum)
{
// The files are identical.
continue;
}
// File has changed. Hotload it.
fileInfo.Checksum = checksum;
fileInfo.Modified = modified;
fileInfo.Parsed = Configs.LoadDocFromStream(fileStream, file);
changedFiles.Add(fileName);
}
}
foreach (string deletedFile in loadedFileNames)
{
AllFiles.Remove(deletedFile);
changedFiles.Add(deletedFile);
}
}
/// Reads and parses a file's contents.
ConfigFileInfo ReadFile(string filePath)
{
using (var fileStream = File.OpenRead(filePath)) {
int checksum = Internal.ChecksumUtils.Checksum(fileStream);
fileStream.Seek(0, SeekOrigin.Begin);
return(new ConfigFileInfo {
Name = GetFileNameFromPath(filePath),
Checksum = checksum,
Size = new FileInfo(filePath).Length,
Modified = File.GetLastWriteTimeUtc(filePath),
Parsed = Configs.LoadDocFromStream(fileStream, filePath)
});
}
}
