make downloading work on Windows. Unzipping doesn't work though

install/torch_installer.nim

@@ -8,8 +8,11 @@
 import
   std/[asyncdispatch, httpclient,
      strformat, strutils, os],
+  #zippy/ziparchives,
   zip/zipfiles
 
+{.passl: "-lz".}
+
 type
   Acceleration* = enum
     Cpu = "cpu"
@@ -26,17 +29,17 @@ type
 proc getProjectDir(): string {.compileTime.} =
   currentSourcePath.rsplit(DirSep, 1)[0]
 
-proc onProgressChanged(total, progress, speed: BiggestInt) {.async.} =
+proc onProgressChanged(total, progress, speed: BiggestInt) =
   echo &"Downloaded {progress} of {total}"
   echo &"Current rate: {speed.float64 / (1000*1000):4.3f} MiBi/s" # TODO the unit is neither MB or Mb or MiBi ???
 
-proc downloadTo(url, targetDir, filename: string) {.async.} =
-  var client = newAsyncHttpClient()
+proc downloadTo(url, targetDir, filename: string) =
+  var client = newHttpClient()
   defer: client.close()
   client.onProgressChanged = onProgressChanged
   echo "Starting download of \"", url, '\"'
   echo "Storing temporary into: \"", targetDir, '\"'
-  await client.downloadFile(url, targetDir / filename)
+  client.downloadFile(url, targetDir / filename)
 
 proc getUrlAndFilename(version = "1.8.1", accel = Cuda111, abi = Cpp11): tuple[url, filename: string] =
   result.filename = "libtorch-"
@@ -47,16 +50,50 @@ proc getUrlAndFilename(version = "1.8.1", accel = Cuda111, abi = Cpp11): tuple[u
       result.filename &= &"%2B{accel}"
     result.filename &= ".zip"
   elif defined(windows):
+    let abi = Cpp
     doAssert abi == Cpp, "LibTorch for Windows does not support the C++11 ABI"
-    result.filename &= &"-win-{abi}-{version}.zip"
+    result.filename &= &"win-{abi}-{version}"
+    result.filename &= &"%2B{accel}"
+    result.filename &= ".zip"
   elif defined(osx):
     doAssert accel == Cpu, "LibTorch for MacOS does not support GPU acceleration"
     result.filename &= &"macos-{version}.zip"
 
   result.url = &"https://download.pytorch.org/libtorch/{accel}/{result.filename}"
 
 proc downloadLibTorch(url, targetDir, filename: string) =
-  waitFor url.downloadTo(targetDir, filename)
+  if not fileExists(targetDir / "libtorch.zip"):
+    url.downloadTo(targetDir, "libtorch.zip")
+  else:
+    echo "File is already downloaded"
+
+#[ proc uncompress(targetDir, filename: string, delete = false) =
+  let tmpZip = targetDir / filename
+  var tmpDir = getTempDir() / "libtorch_temp_download"
+  var i = 0
+  while dirExists(tmpDir & $i):
+    inc(i)
+  tmpDir = tmpDir & $i
+  echo "Tempdir: ", tmpDir
+  let folderName = filename[0 ..< ^4] # remove .zip
+  let targetDir = targetDir# / "test"
+  #removeDir(tmpDir)
+  #createDir(tmpDir)
+  echo "Decompressing \"", tmpZip, "\" and storing into \"", targetDir, "\""
+  extractAll(tmpZip, tmpDir)
+  echo "Extraction done! Now copying from temp"
+  removeDir(targetDir / "libtorch") # remove old install
+  echo "Removed old folder"
+  copyDir(tmpDir, targetDir)
+  echo "Copy done!"
+  removeDir(tmpDir)
+  echo "Done."
+  
+  if delete:
+    echo "Deleting \"", tmpZip, "\""
+    removeFile(tmpZip)
+  else:
+    echo "Not deleting \"", tmpZip, "\"" ]#
 
 proc uncompress(targetDir, filename: string, delete = false) =
   var z: ZipArchive