Scala examples for SOURCE_DATE_EPOCH

Note that Ruby's Datetime.strftime is locale-independent by default.

### Scala

To get milliseconds since Epoch:

```scala

sys.env.get("SOURCE_DATE_EPOCH").map(_.toLong * 1000)

```

To get a `java.util.Date`:

```scala

sys.env.get("SOURCE_DATE_EPOCH")

  .map(sde => new java.util.Date(sde.toLong * 1000))

```

### Last-resort using faketime

''As a last resort to be avoided where possible'' (e.g. if the upstream tool is too hard to patch, or too time-consuming for you right now to patch, or if they are being uncooperative or unresponsive), package maintainers may try something like the following: