CopyDir recursively copies a directory tree, attempting to preserve permissions.

CopyDirChildren recursively copies a directory tree's children, attempting to preserve permissions.

CopyFile copies the contents of the file named src to the file named by dst.

CreateIfNotExist will create the file at the specific path if it does not exist.

DeleteIfExists will delete a file if it exists.

DownloadFile will download a url to a local file.

Exists returns whether the given file or directory exists.

Unzip will decompress a zip archive, moving all files and folders Source: https://golangcode.com/unzip-files-in-go/ within the zip file (parameter 1) to an output directory (parameter 2).