The main purpose is to replace context.TODO with a context provided by the
caller. A secondary purpose is to enable contextual logging.
Modifying the existing interfaces and APIs would have a big impact on the
ecosystem. This is a no-go. Instead, the following approach was taken:
- All interfaces get duplicated in a *WithContext variant where the methods
also have a *WithContext suffix and the ctx parameter. All methods are
treated this way except for obvious local get methods (like RESTClient)
because it cannot be ruled out entirely that some implementation may
need a context.
- Implementations of these interfaces implement both method variants
which is possible because the method names are different.
The old methods are implemented as thin wrappers around the updated
code which is now the body of the new methods or shared helpers.
In some cases there is additional overhead (type checks, potentially
additional allocations) when using the old methods.
- To*WithContext helpers bridge from the old to the new interfaces. They
try a type cast first. Because the in-tree implementations implement
both, they can be used directly. For other implementations wrappers
are used.
- All old APIs and interfaces are marked as deprecated. There is no
intent to ever remove them, but consumers should be made aware
that there are now better alternatives. Implementations also
get marked this way even if nothing ever calls them directly
because it shows which code, at least theoretically, could get
removed.
- Existing unit tests do not get updated to the new APIs. This gives
us unit test coverage of the old and new API because the old
APIs call the new ones.
- In-tree consumers will be updated in follow-up PRs. This is likely
to be a longer process. Because of the deprecation comment,
`hack/golangci-lint.sh -n` can be used to find code which needs
to be updated.
Kubernetes-commit: 025b844bcabe0212c4dd56395ee18481602d7c65
reflect latest struct changes
use correct discovery openapi test data layout
make the OpenAPIv3 interface less blue
field grouping
add copyrights
implement cached discovery client
add cached discovery tests
address review feedback
Kubernetes-commit: 075866b3e3ea029c243d82d8d6eb99e96d9c49d3
