pick up existing cache (#299)

- Improvement: Scavenge .zen temp folders for existing data (downloaded, decompressed or written) from previous failed run
- Improvement: Faster abort during stream compression
- Improvement: Try to move downloaded blobs with rename if possible avoiding an extra disk write
- Improvement: Only clean temp folders on successful or cancelled build - keep it if download fails

2 files changed, 2 insertions, 2 deletions

diff --git a/src/zencore/include/zencore/basicfile.h b/src/zencore/include/zencore/basicfile.h
index a78132879..57798b6f4 100644
--- a/src/zencore/include/zencore/basicfile.h
+++ b/src/zencore/include/zencore/basicfile.h
@@ -186,7 +186,7 @@ private:
 	uint64_t	   m_BufferEnd;
 };
 
-IoBuffer WriteToTempFile(const CompositeBuffer& Buffer, const std::filesystem::path& Path);
+IoBuffer WriteToTempFile(CompositeBuffer&& Buffer, const std::filesystem::path& Path);
 
 ZENCORE_API void basicfile_forcelink();
 
diff --git a/src/zencore/include/zencore/compress.h b/src/zencore/include/zencore/compress.h
index 3969e9dbd..74fd5f767 100644
--- a/src/zencore/include/zencore/compress.h
+++ b/src/zencore/include/zencore/compress.h
@@ -209,7 +209,7 @@ public:
 	 */
 	[[nodiscard]] ZENCORE_API bool DecompressToStream(uint64_t															   RawOffset,
 													  uint64_t															   RawSize,
-													  std::function<void(uint64_t Offset, const CompositeBuffer& Range)>&& Callback) const;
+													  std::function<bool(uint64_t Offset, const CompositeBuffer& Range)>&& Callback) const;
 
 	/** A null compressed buffer. */
 	static const CompressedBuffer Null;