How to decompress and write data from a .tgz file?

[owencraston]

I am trying to decompress a tgz file and write it to a specified directory. Upon success we will return the location of the uncompressed data. The contents of the tgz file is a directory with different js files inside it so I am not sure if that complicates things. Here is what I have so far that is not working.

  func uncompressTgzFile(atPath path: String, toDirectory directory: String) throws -> String {
    print("uncompressTgzFile called with", path, directory)
    let tgzData = try Data(contentsOf: URL(fileURLWithPath: path))
    let decompressedData = try! SWCompression.GzipArchive.unarchive(archive: tgzData)
    print("uncompressTgzFile decompressedData", decompressedData)
    let toFilePath = URL(fileURLWithPath: directory)
    try! decompressedData.write(to: toFilePath)
    return toFilePath.path
  }

Here are the params...
path "/Users/owencraston/Library/Developer/CoreSimulator/Devices/91A956BB-437B-42D2-AE67-DF25C6751A33/data/Containers/Data/Application/FC2E87B9-E2BA-4F60-BB4D-DF530A406B1E/Documents/archive.tgz"
directory "/Users/owencraston/Library/Developer/CoreSimulator/Devices/91A956BB-437B-42D2-AE67-DF25C6751A33/data/Containers/Data/Application/FC2E87B9-E2BA-4F60-BB4D-DF530A406B1E/Documents"

I am getting the error
Error Domain=NSCocoaErrorDomain Code=512 "The file “Documents” couldn’t be saved in the folder “5A7C2620-2D6F-4261-9A7E-77212FE6B2E9”." UserInfo={NSFilePath=/Users/owencraston/Library/Developer/CoreSimulator/Devices/91A956BB-437B-42D2-AE67-DF25C6751A33/data/Containers/Data/Application/5A7C2620-2D6F-4261-9A7E-77212FE6B2E9/Documents, NSUnderlyingError=0x6000011dc000 {Error Domain=NSPOSIXErrorDomain Code=21 "Is a directory"}}

for the try! decompressedData.write(to: toFilePath) call.

Here is a file you can test with...
filsnap-2.3.12.tgz

[tsolomko]

The tgz file is actually tar.gz file, which means that this is a TAR archive that was afterwards compressed with GZip. So when you do this:

  let decompressedData = try! SWCompression.GzipArchive.unarchive(archive: tgzData)

you get a TAR archive that has to be further processed with either TarContainer.open or TarReader.

The error you're seeing is unrelated to the above: you are trying to write a file into an existing path, which is a directory. You have to specify a file name in the URL you are writing to. Data.write(to:) doesn't automatically append any file names to the path that was provided.