We make v2 client code a module go.etcd.io/etcd/client/v2.
Pretty mechanical change that can be summarized as:
mkdir client/v2
cd client/v2 && git mod init go.etcd.io/etcd/client/v2
git mv client/*.go client/v2/
find -name '*.go' | xargs sed -i --follow-symlinks 's|/v3/client["]|/client/v2\"|g'
+ fixing changelog, bom, go.mod etc.
"snapshot" Restore/Status code was the only remaining dependency of client on 'server'
code. The code is solelly used by etcdctl. Long-term the snapshot code
should be migrated to 'etcdadm' style of tool such that we can
distinguish tool solelly depending on networking API vs. tools that
operation on etcd files directly.
We left snapshot.Save() code in clientv3.snapshot package, such that
clients can benefits from automated download&safe to file snapshot
functionality over the wire.
There was undetected 'conflict' between
11ba1a610939218c6779a960f764b2bcfdd7fb83
and 2c66612e0ecb42abde6a4761cd708f5d285e0635.
Moving the file to proper location.
We introduce a LazyCluster abstraction (instead of copy-pasted logic)
that makes clusters to be created only if there are runnable tests
in need for the infrastructure.
This CL tries to connect 2 objectives:
- Examples should be close (the same package) to the original code,
such that they can participate in documentation.
- Examples should be runnable - such that they are not getting out of
sync with underlying API/implementation.
In case of etcd-client, the examples are assuming running 'integration'
style, i.e. thay do connect to fully functional etcd-server.
That would lead to a cyclic dependencies between modules:
- server depends on client (as client need to be lightweight)
- client (for test purposes) depend on server.
Go modules does not allow to distingush testing dependency from
prod-code dependency.
Thus to meet the objective:
- The examples are getting executed within testing/integration packages against real etcd
- The examples are symlinked to 'unit' tests, such that they included in documentation.
- Long-term the unit examples should get rewritten to use 'mocks' instead of real integration tests.
