Use copy file command to speed up export

Now runs in 0.1s instead of 8s

Author: LocalIdentity

src/Export/Scripts/passivetree_ggg.lua

@@ -646,11 +646,10 @@ for _, strFile in ipairs(fileAssets) do
 
 	-- this file contains frame & meta
 	local fileNameMeta =  dataFrame.meta.image
-	-- copy the file to tree data destination
-	-- this assume you are on windows
-	local copyResult = os.execute(string.format('copy /Y "%s\\%s" "%s"', assetsFolder, fileNameMeta, path))
-	if copyResult ~= 0 then
+	local copied, copyErr = copyFile(assetsFolder .. "\\" .. fileNameMeta, path .. fileNameMeta)
+	if not copied then
 		printf("Error copying asset " .. fileNameMeta)
+		printf(copyErr)
 		return
 	end
 

src/Modules/Common.lua

@@ -801,11 +801,11 @@ function getFormatSec(dec)
 end
 
 function copyFile(srcName, dstName)
-	local inFile, msg = io.open(srcName, "r")
+	local inFile, msg = io.open(srcName, "rb")
 	if not inFile then
 		return nil, "Couldn't open '"..srcName.."': "..msg
 	end
-	local outFile, msg = io.open(dstName, "w")
+	local outFile, msg = io.open(dstName, "wb")
 	if not outFile then
 		return nil, "Couldn't create '"..dstName.."': "..msg
 	end