create abstract method
Creates a symbolic link in the file system.
The created link will point to the path at target, whether that path
exists or not.
Returns a Future<Link> that completes with
the link when it has been created. If the link path already exists,
the future will complete with an error.
If recursive is false, the default, the link is created
only if all directories in its path exist.
If recursive is true, all non-existing parent paths
are created first. The directories in the path of target are
not affected, unless they are also in path.
On the Windows platform, this call will create a true symbolic link
instead of a junction. Windows treats links to files and links to
directories as different and non-interchangable kinds of links.
Each link is either a file-link or a directory-link, and the type is
chosen when the link is created, and the link then counts as either a
file or directory for most purposes. Different Win32 API calls are
used to manipulate each. For example, the DeleteFile function is
used to delete links to files, and RemoveDirectory must be used to
delete links to directories.
The created Windows symbolic link will match the type of the target,
if target exists, otherwise a file-link is created. The type of the
created link will not change if target is later replaced by something
of a different type, but then the link will not be resolvable by
resolveSymbolicLinks.
In order to create a symbolic link on Windows, Dart must be run in
Administrator mode or the system must have Developer Mode enabled,
otherwise a FileSystemException will be raised with
ERROR_PRIVILEGE_NOT_HELD set as the errno when this call is made.
On other platforms, the POSIX symlink() call is used to make a symbolic
link containing the string target. If target is a relative path,
it will be interpreted relative to the directory containing the link.
Implementation
Future<Link> create(String target, {bool recursive = false});