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✨ [release-0.8] Add client.StrategicMergeFrom #1413

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timebertt
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Cherry-pick of #1406:

This PR adds client.StrategicMergeFrom.
The function is similar to client.{MergeFrom,MergeFromWithOptions}, but it creates a strategic-merge-patch instead of a merge-patch. See doc strings for more details about the differences of the two patch types and to figure out when to use which one.

Note, that strategic merge patches are not supported by CRDs.

@k8s-ci-robot k8s-ci-robot added the cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. label Mar 4, 2021
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Hi @timebertt. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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@k8s-ci-robot k8s-ci-robot added needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. size/L Denotes a PR that changes 100-499 lines, ignoring generated files. labels Mar 4, 2021
@timebertt
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I wasn't sure, if we can backport this feature to 0.8, so I'm kindly asking if it's reasonable by opening this PR.
/assign @alvaroaleman

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/ok-to-test

@k8s-ci-robot k8s-ci-robot added ok-to-test Indicates a non-member PR verified by an org member that is safe to test. and removed needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. labels Mar 4, 2021
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@alvaroaleman alvaroaleman left a comment

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/lgtm
/approve

@k8s-ci-robot k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Mar 4, 2021
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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alvaroaleman, timebertt

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@k8s-ci-robot k8s-ci-robot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Mar 4, 2021
@k8s-ci-robot k8s-ci-robot merged commit c7e9da4 into kubernetes-sigs:release-0.8 Mar 4, 2021
@timebertt timebertt deleted the enh/strategic-merge-patch-0.8 branch March 4, 2021 20:31
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Great, thank you!

rfranzke added a commit to rfranzke/gardener that referenced this pull request Mar 9, 2021
Due to kubernetes-sigs/controller-runtime#1413,
naive gomock expectations don't work anymore. The reason is that the
`mergeFromPatch` struct has now a function attribute (`createPatch`),
and as `gomega` is using `reflect.DeepEqual` under the hood, the
comparison now fails:

> Func values are deeply equal if both are nil; otherwise they are not deeply equal.
(from https://golang.org/pkg/reflect/#DeepEqual)

Hence, we introduce our own `test.EXPECTPatch()` function.

Thanks to @timuthy for pointing this out.
rfranzke added a commit to rfranzke/gardener that referenced this pull request Mar 12, 2021
Due to kubernetes-sigs/controller-runtime#1413,
naive gomock expectations don't work anymore. The reason is that the
`mergeFromPatch` struct has now a function attribute (`createPatch`),
and as `gomega` is using `reflect.DeepEqual` under the hood, the
comparison now fails:

> Func values are deeply equal if both are nil; otherwise they are not deeply equal.
(from https://golang.org/pkg/reflect/#DeepEqual)

Hence, we introduce our own `test.EXPECTPatch()` function.

Thanks to @timuthy for pointing this out.
This was referenced Mar 15, 2021
timuthy pushed a commit to gardener/gardener that referenced this pull request Mar 15, 2021
* make revendor generate

* Get rid of third_party/forked/kubernetes

* Adapt Patch() expectations of MockClient

Due to kubernetes-sigs/controller-runtime#1413,
naive gomock expectations don't work anymore. The reason is that the
`mergeFromPatch` struct has now a function attribute (`createPatch`),
and as `gomega` is using `reflect.DeepEqual` under the hood, the
comparison now fails:

> Func values are deeply equal if both are nil; otherwise they are not deeply equal.
(from https://golang.org/pkg/reflect/#DeepEqual)

Hence, we introduce our own `test.EXPECTPatch()` function.

Thanks to @timuthy for pointing this out.

* Adapt kubelet config
krgostev pushed a commit to krgostev/gardener that referenced this pull request Apr 21, 2022
* make revendor generate

* Get rid of third_party/forked/kubernetes

* Adapt Patch() expectations of MockClient

Due to kubernetes-sigs/controller-runtime#1413,
naive gomock expectations don't work anymore. The reason is that the
`mergeFromPatch` struct has now a function attribute (`createPatch`),
and as `gomega` is using `reflect.DeepEqual` under the hood, the
comparison now fails:

> Func values are deeply equal if both are nil; otherwise they are not deeply equal.
(from https://golang.org/pkg/reflect/#DeepEqual)

Hence, we introduce our own `test.EXPECTPatch()` function.

Thanks to @timuthy for pointing this out.

* Adapt kubelet config
krgostev pushed a commit to krgostev/gardener that referenced this pull request Jul 5, 2022
* make revendor generate

* Get rid of third_party/forked/kubernetes

* Adapt Patch() expectations of MockClient

Due to kubernetes-sigs/controller-runtime#1413,
naive gomock expectations don't work anymore. The reason is that the
`mergeFromPatch` struct has now a function attribute (`createPatch`),
and as `gomega` is using `reflect.DeepEqual` under the hood, the
comparison now fails:

> Func values are deeply equal if both are nil; otherwise they are not deeply equal.
(from https://golang.org/pkg/reflect/#DeepEqual)

Hence, we introduce our own `test.EXPECTPatch()` function.

Thanks to @timuthy for pointing this out.

* Adapt kubelet config
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3 participants