/// <summary>
/// Load the operation state from the provided directory
/// </summary>
public static bool TryLoadState(
Path operationGraphFile,
FileSystemState fileSystemState,
out OperationGraph result)
{
// Verify the requested file exists
if (!System.IO.File.Exists(operationGraphFile.ToString()))
{
Log.Info("Operation graph file does not exist");
result = new OperationGraph();
return(false);
}
// Open the file to read from
using (var fileStream = System.IO.File.OpenRead(operationGraphFile.ToString()))
using (var reader = new System.IO.BinaryReader(fileStream))
{
// Read the contents of the build state file
try
{
var loadedResult = OperationGraphReader.Deserialize(reader);
// Map up the incoming file ids to the active file system state ids
var activeFileIdMap = new Dictionary <FileId, FileId>();
for (var i = 0; i < loadedResult.GetReferencedFiles().Count; i++)
{
var fileReference = loadedResult.GetReferencedFiles()[i];
var activeFileId = fileSystemState.ToFileId(fileReference.Path);
activeFileIdMap.Add(fileReference.FileId, activeFileId);
// Update the referenced id
fileReference.FileId = activeFileId;
}
// Update all of the operations
foreach (var operationReference in loadedResult.GetOperations())
{
var operation = operationReference.Value;
UpdateFileIds(operation.DeclaredInput, activeFileIdMap);
UpdateFileIds(operation.DeclaredOutput, activeFileIdMap);
UpdateFileIds(operation.ObservedInput, activeFileIdMap);
UpdateFileIds(operation.ObservedOutput, activeFileIdMap);
}
result = loadedResult;
return(true);
}
catch
{
Log.Error("Failed to parse operation graph");
result = new OperationGraph();
return(false);
}
}
}
