copy: provide compression info about copied blobs

When copying a compressed blob without making any modifications to it, set the CompressionFormat in the returned BlobInfo to reflect the compression algorithm that was used to compress the blob. Signed-off-by: Nalin Dahyabhai <[email protected]>
containers · Feb 8, 2021 · e15955f · e15955f
1 parent 6ac2fbc
commit e15955f
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/copy/copy.go b/copy/copy.go
@@ -1353,7 +1353,11 @@ func (c *copier) copyBlobFromStream(ctx context.Context, srcStream io.Reader, sr
 		compressionOperation = types.PreserveOriginal
 		inputInfo = srcInfo
 		uploadCompressorName = srcCompressorName
-		uploadCompressionFormat = nil
+		if isCompressed {
+			uploadCompressionFormat = &compressionFormat
+		} else {
+			uploadCompressionFormat = nil
+		}
 	}
 
 	// === Encrypt the stream for valid mediatypes if ociEncryptConfig provided