(Swift 3/4) SFTP Delete Directory

Demonstrates how to delete a directory on the remote SFTP server. The directory should be empty prior to deleting.

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func chilkatTest() {
    //  Important: It is helpful to send the contents of the
    //  sftp.LastErrorText property when requesting support.

    let sftp = CkoSFtp()!

    //  Any string automatically begins a fully-functional 30-day trial.
    var success: Bool = sftp.unlockComponent("Anything for 30-day trial")
    if success != true {
        print("\(sftp.lastErrorText!)")
        return
    }

    //  Set some timeouts, in milliseconds:
    sftp.connectTimeoutMs = 5000
    sftp.idleTimeoutMs = 10000

    //  Connect to the SSH server.
    //  The standard SSH port = 22
    //  The hostname may be a hostname or IP address.
    var port: Int
    var hostname: String?
    hostname = "www.my-ssh-server.com"
    port = 22
    success = sftp.connect(hostname, port: port)
    if success != true {
        print("\(sftp.lastErrorText!)")
        return
    }

    //  Authenticate with the SSH server.  Chilkat SFTP supports
    //  both password-based authenication as well as public-key
    //  authentication.  This example uses password authenication.
    success = sftp.authenticatePw("myLogin", password: "myPassword")
    if success != true {
        print("\(sftp.lastErrorText!)")
        return
    }

    //  After authenticating, the SFTP subsystem must be initialized:
    success = sftp.initializeSftp()
    if success != true {
        print("\(sftp.lastErrorText!)")
        return
    }

    //  Delete a directory on the server.
    //  The directory should be empty prior to deleting.
    success = sftp.removeDir("abc123")
    if success != true {
        print("\(sftp.lastErrorText!)")
        return
    }

    print("Directory Deleted!")

}