}

    private String suggestDowngradePlugin(String pluginId) {
        return "Downgrade plugin " + pluginId + " to an older version compatible with " + currentGradleVersion + ".";
    }

	cfg.HSTSPreload = hstsPreload

	referrerPolicy := env.Get(EnvBrowserReferrerPolicy, kvs.GetWithDefault(browserReferrerPolicy, DefaultKVS))
	switch referrerPolicy {
	case "no-referrer", "no-referrer-when-downgrade", "origin", "origin-when-cross-origin", "same-origin", "strict-origin", "strict-origin-when-cross-origin", "unsafe-url":
		cfg.ReferrerPolicy = referrerPolicy
	default:

		// If a resource has to be stored in a version that is not the
		// latest, then it can be listed here. Usually this is the case
		// when a new version for a resource gets introduced and a
		// downgrade to an older apiserver that doesn't know the new
		// version still needs to be supported for one release.
		//
		// Example from Kubernetes 1.24 where csistoragecapacities had just
		// graduated to GA:
		//

        output.contains "org.jacoco:org.jacoco.ant:"
    }

    def "allows configuring tool dependencies explicitly"() {
        when:
        buildFile << """
            dependencies {
                //downgrade version:
                jacocoAgent "org.jacoco:org.jacoco.agent:0.6.0.201210061924"
                jacocoAnt "org.jacoco:org.jacoco.ant:0.6.0.201210061924"
            }
        """

		// When Server Side Apply is not enabled, fallback to Update. This is required when running
		// 1.21 since api-server can be 1.20 during the upgrade/downgrade.
		// Since Server Side Apply is enabled by default in Beta, this fallback only kicks in
		// if the feature has been disabled using its feature flag.
		err = c.updateClusterRoles(ctx, sharedClusterRole, newPolicyRules)
	}

	flags.Uint64Var(&opts.port, "port", 0,
		"etcd client port to use during migration operations. "+
			"This should be a different port than typically used by etcd to avoid clients accidentally connecting during upgrade/downgrade operations. "+
			"If unset default to 18629 or 18631 depending on <data-dir>.")
	flags.Uint64Var(&opts.peerPort, "peer-port", 0,

go mod tidy -go=1.16
cmp go.mod go.mod.116

go mod tidy
cmp go.mod go.mod.116


go mod tidy -go=1.17
cmp go.mod go.mod.117

go mod tidy
cmp go.mod go.mod.117


# If we downgrade back to 1.15, we should re-resolve d to v0.2.0 instead
# of the original v0.1.0 (because the original requirement is lost).

go mod tidy -go=1.15
cmp go.mod go.mod.115-2

stderr '^go: added toolchain go1.22.1$'
! stderr '(added|removed|upgraded|downgraded) go'
grep 'toolchain go1.22.1' go.mod

go get toolchain@none
stderr '^go: removed toolchain go1.22.1$'
! stderr '(added|removed|upgraded|downgraded) go'
! grep toolchain go.mod

go get toolchain@go1.22.1
stderr '^go: added toolchain go1.22.1$'
! stderr '(added|removed|upgraded|downgraded) go'
grep 'toolchain go1.22.1' go.mod

go get go@1.22.3

example.com/latemigrate/v2 v2.0.0
written by hand

This repository migrated to modules in v2.0.1 after v2.0.0 was already tagged.
All versions require rsc.io/quote so we can test downgrades.

v2.0.0 is technically part of example.com/latemigrate as v2.0.0+incompatible.
Proxies may serve it as part of the version list for example.com/latemigrate/v2.
'go get' must be able to ignore these versions.

-- .mod --
module example.com/latemigrate
-- .info --

utility bundled with the image.

In addition to the latest etcd version, each `registry.k8s.io/etcd` image contains
etcd and etcdctl binaries for older versions of etcd. These are used by the
migration operator utility when performing downgrades and multi-step upgrades,
but can also be used as the etcd target version.

#### Usage

Always run `/usr/local/bin/migrate` (or the
`/usr/local/bin/migrate-if-needed.sh` wrapper script) before starting the etcd