/// <summary>
/// Returns a unique redirected directory (located under the process unique redirected directory root) that is stable across builds
/// </summary>
private AbsolutePath GetUniqueRedirectedDirectory(Process process, ref ReserveFoldersResolver reserveFoldersResolver, AbsolutePath originalDirectory)
{
var name = originalDirectory.GetName(m_pathTable);
var count = reserveFoldersResolver.GetNextId(name);
var stringTable = m_pathTable.StringTable;
var pathAtom = count == 0
? name
: PathAtom.Create(stringTable, $"{name.ToString(stringTable)}_{count}");
var redirectedDirectory = process.UniqueRedirectedDirectoryRoot.Combine(m_pathTable, pathAtom);
return(redirectedDirectory);
}
private void CreateMappingForOutputs(Process process, out MultiValueDictionary <AbsolutePath, ExpandedAbsolutePath> originalDirectories, out MultiValueDictionary <ExpandedAbsolutePath, ExpandedAbsolutePath> redirectedDirectories)
{
// Collect all predicted outputs (directories and files) for the given process
var directories = CollectAllOutputDirectories(m_pathTable, process);
// In order to keep the filter configuration to its minimum, let's remove directories that are nested within each other
var dedupDirectories = AbsolutePathUtilities.CollapseDirectories(directories, m_pathTable, out var originalToCollapsedMapping);
var stringTable = m_pathTable.StringTable;
var reserveFoldersResolver = new ReserveFoldersResolver(new object());
originalDirectories = new MultiValueDictionary <AbsolutePath, ExpandedAbsolutePath>(originalToCollapsedMapping.Count);
redirectedDirectories = new MultiValueDictionary <ExpandedAbsolutePath, ExpandedAbsolutePath>(dedupDirectories.Count, ExpandedAbsolutePathEqualityComparer.Instance);
// Map from original dedup directories to unique redirected directories
var uniqueRedirectedDirectories = new Dictionary <AbsolutePath, ExpandedAbsolutePath>(dedupDirectories.Count);
foreach (var kvp in originalToCollapsedMapping)
{
AbsolutePath originalDirectory = kvp.Key;
AbsolutePath originalCollapsedDirectory = kvp.Value;
if (!uniqueRedirectedDirectories.TryGetValue(originalCollapsedDirectory, out var uniqueRedirectedDirectory))
{
uniqueRedirectedDirectory = GetUniqueRedirectedDirectory(process, ref reserveFoldersResolver, originalCollapsedDirectory).Expand(m_pathTable);
uniqueRedirectedDirectories.Add(originalCollapsedDirectory, uniqueRedirectedDirectory);
redirectedDirectories.Add(uniqueRedirectedDirectory, originalCollapsedDirectory.Expand(m_pathTable));
}
// Let's reconstruct the redirected directory
var redirectedDirectory = originalDirectory.Relocate(m_pathTable, originalCollapsedDirectory, uniqueRedirectedDirectory.Path);
originalDirectories.Add(originalDirectory, redirectedDirectory.Expand(m_pathTable));
}
}
