jonjohnsonjr 3c6a907da9 Add additional output formats (tarball and layout) (#134) ...

* Create a MultiPublisher

MultiPublisher mimics io.MultiWriter in that it will publish an image to
multiple publish.Interface implementations.

* Add publish.{Tarball,Layout}Publisher

This adds support for publishing in the tarball format and to an OCI
image layout.

The tarball format isn't great, yet. It only supports writing once
instead of appending.

* Consolidate options

These were spread all over the place for no reasons. Now all the
publisher related options are grouped together.

* Add options for tarball/layout

Adds --oci-layout-path, --tarball, and --push flags.

--push=false will disable the default behavior of publishing to a
registry.

* go mod vendor

* Add Close method to publish.Interface

This allows us to defer writing to the tarball until we've collected all
the images that have been published.

* Fix tests

2020-02-19 09:30:01 -08:00

..

testing

Add additional output formats (tarball and layout) (#134)

2020-02-19 09:30:01 -08:00