Handle time.Duration in Preparer

[arichardet]

At some point, a date in ISO 8601 will need to be accepted for a field for the user module. This may be useful for other modules, so we probably want to handle this in the preparer.

[BrianHicks]

How about this?

type Blah struct {
    Timeout    time.Duration `hcl:"timeout"`
    ExpiryDate time.Time     `hcl:"time"`
}

if the parser hits a time.Duration it will parse it with time.ParseDuration and expose the error (if any) to the user.

If the parser hits a time.Time, it will parse it as "YYYY-MM-DDThh:mm:ssz". If that fails, it will try parsing as "YYYY-MM-DD" and set the time of day to zero and the timezone to the system timezone.

[arichardet]

Yes, that seems to make sense.

[arichardet]

Closing this issue for the implementation of time.Duration. Opening issue #490 to handle adding time.Time.