Some registries require getting a token even to download an image
anonymously. So, if no auth has been configured, before prompting
the user for username/password, try without a BasicAuth header.
Signed-off-by: Owen W. Taylor <otaylor@fishsoup.net>
We rely on broadcast signals for authenticator replies rather than unicast
as these are not filtered by the sandbox (due to them being opt-in by the
receiver).
Actually this already worked fine in the flatpak side as the generated
code already subscribes to the signals, this just switches the internal
authenticators (test and oci) to using the new way to emit signals.
We look in these, in this order:
~/.config/flatpak/oci-auth.json
/etc/flatpak/oci-auth.json
/run/user/$uid/containers/auth.json
/run/containers/$uid/auth.json
~/.docker/config.json
The first two are flatpak specific, and the others are what
skopeo and docker use.
Given a configuration like:
[remote "oci-remote"]
url=oci+http://some.server.com/api/v1/organization/foo?index=labels
xa.authenticator-name=org.flatpak.Authenticator.Oci
xa.default-token-type=1
xa.authenticator-options={"auth": <"a-token-here">}
I was able to install an app from an OCI remote that required a login
