Write dummy file to ensure directories exist for remote execution

1 files changed, 14 insertions, 0 deletions

diff --git a/zenserver/upstream/upstreamapply.cpp b/zenserver/upstream/upstreamapply.cpp
index 1779099ff..e34781eb0 100644
--- a/zenserver/upstream/upstreamapply.cpp
+++ b/zenserver/upstream/upstreamapply.cpp
@@ -37,6 +37,9 @@ namespace zen {
 
 using namespace std::literals;
 
+static const IoBuffer EmptyBuffer;
+static const IoHash	  EmptyBufferId = IoHash::HashBuffer(EmptyBuffer);
+
 namespace detail {
 
 	class HordeUpstreamApplyEndpoint final : public UpstreamApplyEndpoint
@@ -705,6 +708,8 @@ namespace detail {
 
 		[[nodiscard]] bool ProcessApplyKey(const UpstreamApplyRecord& ApplyRecord, UpstreamData& Data)
 		{
+			using namespace fmt::literals;
+
 			std::string								ExecutablePath;
 			std::map<std::string, std::string>		Environment;
 			std::set<std::filesystem::path>			InputFiles;
@@ -736,6 +741,15 @@ namespace detail {
 				}
 			}
 
+			for (auto& It : ApplyRecord.WorkerDescriptor["dirs"sv])
+			{
+				std::string_view Directory = It.AsString();
+				std::string		 DummyFile = "{}/.zen_empty_file"_format(Directory);
+				InputFiles.insert(DummyFile);
+				Data.Blobs[EmptyBufferId] = EmptyBuffer;
+				InputFileHashes[DummyFile]	= EmptyBufferId;
+			}
+
 			for (auto& It : ApplyRecord.WorkerDescriptor["environment"sv])
 			{
 				std::string_view Env   = It.AsString();