Merge pull request #34 from pohly/tidy-go-mod

clean up go.mod

Author: k8s-ci-robot

go.mod

@@ -5,6 +5,7 @@ go 1.12
 require (
 	github.com/container-storage-interface/spec v1.1.0
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/evanphx/json-patch v4.5.0+incompatible // indirect
 	github.com/gogo/protobuf v1.2.1 // indirect
 	github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef // indirect
 	github.com/golang/protobuf v1.3.1
@@ -13,6 +14,10 @@ require (
 	github.com/json-iterator/go v1.1.6 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 // indirect
+	github.com/onsi/ginkgo v1.10.2 // indirect
+	github.com/onsi/gomega v1.7.0 // indirect
+	github.com/pkg/errors v0.8.1 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/stretchr/testify v1.3.0
 	golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c // indirect
 	golang.org/x/net v0.0.0-20190328230028-74de082e2cca

go.sum

@@ -7,8 +7,13 @@ github.com/container-storage-interface/spec v1.1.0/go.mod h1:6URME8mwIBbpVyZV93C
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/evanphx/json-patch v4.5.0+incompatible h1:ouOWdg56aJriqS0huScTkVXPC5IcNrDCXZ6OoTAWu7M=
+github.com/evanphx/json-patch v4.5.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
+github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/gogo/protobuf v1.2.1 h1:/s5zKNz0uPFCZ5hddgPdo2TK2TVrUNMn0OOX8/aZMTE=
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
+github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef h1:veQD95Isof8w9/WXiA+pa3tz3fJXkt5B7QaRBrM62gk=
 github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
@@ -20,6 +25,8 @@ github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf h1:+RRA9JqSOZFfKrOeq
 github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf/go.mod h1:HP5RmnzzSNb993RKQDq4+1A4ia9nllfqcQFTQJedwGI=
 github.com/googleapis/gnostic v0.2.0 h1:l6N3VoaVzTncYYW+9yOz2LJJammFZGBO13sqgEhpy9g=
 github.com/googleapis/gnostic v0.2.0/go.mod h1:sJBsCZ4ayReDTBIg8b9dl28c5xFWyhBTVRp3pOg5EKY=
+github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
+github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/json-iterator/go v1.1.6 h1:MrUvLMLTMxbqFJ9kzlvat/rYZqZnW3u4wkLzWTaFwKs=
 github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
@@ -28,8 +35,17 @@ github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 h1:Esafd1046DLDQ0W1YjYsBW+p8U2u7vzgW2SQVmlNazg=
 github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
+github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
+github.com/onsi/ginkgo v1.10.2 h1:uqH7bpe+ERSiDa34FDOF7RikN6RzXgduUF8yarlZp94=
+github.com/onsi/ginkgo v1.10.2/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
+github.com/onsi/gomega v1.7.0 h1:XPnZz8VVBHjVsy1vzJmRwIcSwiUO+JFfrv/xGiigmME=
+github.com/onsi/gomega v1.7.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
+github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
+github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
@@ -41,6 +57,7 @@ golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTk
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190328230028-74de082e2cca h1:hyA6yiAgbUwuWqtscNvWAI7U1CtlaD1KilQ6iudt1aI=
@@ -53,6 +70,7 @@ golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190329044733-9eb1bfa1ce65 h1:hOY+O8MxdkPV10pNf7/XEHaySCiPKxixMKUshfHsGn0=
 golang.org/x/sys v0.0.0-20190329044733-9eb1bfa1ce65/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -73,9 +91,15 @@ google.golang.org/genproto v0.0.0-20190327125643-d831d65fe17d/go.mod h1:VzzqZJRn
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.19.1 h1:TrBcJ1yqAl1G++wO39nD/qtgpsW9/1+QGrluyMGEYgM=
 google.golang.org/grpc v1.19.1/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/inf.v0 v0.9.1 h1:73M5CoZyi3ZLMOyDlQh031Cx6N9NDJ2Vvfl76EDAgDc=
 gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

release-tools/README.md

@@ -106,3 +106,57 @@ Kubernetes releases:
 
     CSI_PROW_KUBERNETES_VERSION=1.13.3 ./.prow.sh
     CSI_PROW_KUBERNETES_VERSION=latest ./.prow.sh
+
+Dependencies and vendoring
+--------------------------
+
+Most projects will (eventually) use `go mod` to manage
+dependencies. `dep` is also still supported by `csi-release-tools`,
+but not documented here because it's not recommended anymore.
+
+The usual instructions for using [go
+modules](https://github.com/golang/go/wiki/Modules) apply. Here's a cheat sheet
+for some of the relevant commands:
+- list available updates: `GO111MODULE=on go list -u -m all`
+- update or add a single dependency: `GO111MODULE=on go get <package>`
+- update all dependencies to their next minor or patch release:
+  `GO111MODULE=on go get ./...` (add `-u=patch` to limit to patch
+  releases)
+- lock onto a specific version: `GO111MODULE=on go get <package>@<version>`
+- clean up `go.mod`: `GO111MODULE=on go mod tidy`
+- update vendor directory: `GO111MODULE=on go mod vendor`
+
+`GO111MODULE=on` can be left out when using Go >= 1.13 or when the
+source is checked out outside of `$GOPATH`.
+
+`go mod tidy` must be used to ensure that the listed dependencies are
+really still needed. Changing import statements or a tentative `go
+get` can result in stale dependencies.
+
+The `test-vendor` verifies that it was used when run locally or in a
+pre-merge CI job. If a `vendor` directory is present, it will also
+verify that it's content is up-to-date.
+
+The `vendor` directory is optional. It is still present in projects
+because it avoids downloading sources during CI builds. If this is no
+longer deemed necessary, then a project can also remove the directory.
+
+When using packages that are part of the Kubernetes source code, the
+commands above are not enough because the [lack of semantic
+versioning](https://github.com/kubernetes/kubernetes/issues/72638)
+prevents `go mod` from finding newer releases. Importing directly from
+`kubernetes/kubernetes` also needs `replace` statements to override
+the fake `v0.0.0` versions
+(https://github.com/kubernetes/kubernetes/issues/79384). The
+`go-get-kubernetes.sh` script can be used to update all packages in
+lockstep to a different Kubernetes version. It takes a single version
+number like "1.16.0".
+
+Conversion of a repository that uses `dep` to `go mod` can be done with:
+
+    GO111MODULE=on go mod init
+    release-tools/go-get-kubernetes.sh <current Kubernetes version from Gopkg.toml>
+    GO111MODULE=on go mod tidy
+    GO111MODULE=on go mod vendor
+    git rm -f Gopkg.toml Gopkg.lock
+    git add go.mod go.sum vendor

release-tools/build.make

@@ -57,13 +57,17 @@ else
 TESTARGS =
 endif
 
+ARCH := $(if $(GOARCH),$(GOARCH),$(shell go env GOARCH))
+
 # Specific packages can be excluded from each of the tests below by setting the *_FILTER_CMD variables
 # to something like "| grep -v 'github.com/kubernetes-csi/project/pkg/foobar'". See usage below.
 
 build-%:
 	mkdir -p bin
 	CGO_ENABLED=0 GOOS=linux go build -a -ldflags '-X main.version=$(REV) -extldflags "-static"' -o ./bin/$* ./cmd/$*
-	CGO_ENABLED=0 GOOS=windows go build -a -ldflags '-X main.version=$(REV) -extldflags "-static"' -o ./bin/$*.exe ./cmd/$*
+	if [ "$$ARCH" = "amd64" ]; then \
+		CGO_ENABLED=0 GOOS=windows go build -a -ldflags '-X main.version=$(REV) -extldflags "-static"' -o ./bin/$*.exe ./cmd/$* ; \
+	fi
 
 container-%: build-%
 	docker build -t $*:latest -f $(shell if [ -e ./cmd/$*/Dockerfile ]; then echo ./cmd/$*/Dockerfile; else echo Dockerfile; fi) --label revision=$(REV) .
@@ -126,6 +130,26 @@ test-fmt:
 # - the fabricated merge commit leaves go.mod, go.sum and vendor dir unchanged
 # - release-tools also didn't change (changing rules or Go version might lead to
 #   a different result and thus must be tested)
+# - import statements not changed (because if they change, go.mod might have to be updated)
+#
+# "git diff" is intelligent enough to annotate changes inside the "import" block in
+# the start of the diff hunk:
+#
+# diff --git a/rpc/common.go b/rpc/common.go
+# index bb4a5c4..5fa4271 100644
+# --- a/rpc/common.go
+# +++ b/rpc/common.go
+# @@ -21,7 +21,6 @@ import (
+#         "fmt"
+#         "time"
+#
+# -       "google.golang.org/grpc"
+#         "google.golang.org/grpc/codes"
+#         "google.golang.org/grpc/status"
+#
+# We rely on that to find such changes.
+#
+# Vendoring is optional when using go.mod.
 .PHONY: test-vendor
 test: test-vendor
 test-vendor:
@@ -136,22 +160,37 @@ test-vendor:
 			*v0.[56789]*) dep check && echo "vendor up-to-date" || false;; \
 			*) echo "skipping check, dep >= 0.5 required";; \
 		esac; \
-	  else \
-		echo "Repo uses 'go mod' for vendoring."; \
+	elif [ -f go.mod ]; then \
+		echo "Repo uses 'go mod'."; \
 		if [ "$${JOB_NAME}" ] && \
                    ( [ "$${JOB_TYPE}" != "presubmit" ] || \
-                     [ $$(git diff "${PULL_BASE_SHA}..HEAD" -- go.mod go.sum vendor release-tools | wc -l) -eq 0 ] ); then \
-			echo "Skipping vendor check because the Prow pre-submit job does not change vendoring."; \
-		elif ! GO111MODULE=on go mod vendor; then \
+                     [ $$( (git diff "${PULL_BASE_SHA}..HEAD" -- go.mod go.sum vendor release-tools; \
+                            git diff "${PULL_BASE_SHA}..HEAD" | grep -e '^@@.*@@ import (' -e '^[+-]import') | \
+		          wc -l) -eq 0 ] ); then \
+			echo "Skipping vendor check because the Prow pre-submit job does not affect dependencies."; \
+		elif ! GO111MODULE=on go mod tidy; then \
 			echo "ERROR: vendor check failed."; \
 			false; \
-		elif [ $$(git status --porcelain -- vendor | wc -l) -gt 0 ]; then \
-			echo "ERROR: vendor directory *not* up-to-date, it did get modified by 'GO111MODULE=on go mod vendor':"; \
-			git status -- vendor; \
-			git diff -- vendor; \
+		elif [ $$(git status --porcelain -- go.mod go.sum | wc -l) -gt 0 ]; then \
+			echo "ERROR: go module files *not* up-to-date, they did get modified by 'GO111MODULE=on go mod tidy':"; \
+			git diff -- go.mod go.sum; \
 			false; \
+		elif [ -d vendor ]; then \
+			if ! GO111MODULE=on go mod vendor; then \
+				echo "ERROR: vendor check failed."; \
+				false; \
+			elif [ $$(git status --porcelain -- vendor | wc -l) -gt 0 ]; then \
+				echo "ERROR: vendor directory *not* up-to-date, it did get modified by 'GO111MODULE=on go mod vendor':"; \
+				git status -- vendor; \
+				git diff -- vendor; \
+				false; \
+			else \
+				echo "Go dependencies and vendor directory up-to-date."; \
+			fi; \
+		else \
+			echo "Go dependencies up-to-date."; \
 		fi; \
-	 fi;
+	fi
 
 .PHONY: test-subtree
 test: test-subtree

release-tools/go-get-kubernetes.sh

@@ -0,0 +1,104 @@
+#!/usr/bin/env bash
+
+# Copyright 2019 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# This script can be used while converting a repo from "dep" to "go mod"
+# by calling it after "go mod init" or to update the Kubernetes packages
+# in a repo that has already been converted. Only packages that are
+# part of kubernetes/kubernetes and thus part of a Kubernetes release
+# are modified. Other k8.io packages (like k8s.io/klog, k8s.io/utils)
+# need to be updated separately.
+
+set -o pipefail
+
+cmd=$0
+
+function help () {
+    echo "$cmd <kubernetes version = x.y.z> - update all components from kubernetes/kubernetes to that version"
+}
+
+if [ $# -ne 1 ]; then
+    help
+    exit 1
+fi
+case "$1" in -h|--help|help) help; exit 0;; esac
+
+die () {
+    echo >&2 "$@"
+    exit 1
+}
+
+k8s="$1"
+
+# If the repo imports k8s.io/kubernetes (directly or indirectly), then
+# "go mod" will try to find "v0.0.0" versions because
+# k8s.io/kubernetes has those in it's go.mod file
+# (https://github.com/kubernetes/kubernetes/blob/2bd9643cee5b3b3a5ecbd3af49d09018f0773c77/go.mod#L146-L157).
+# (https://github.com/kubernetes/kubernetes/issues/79384).
+#
+# We need to replicate the replace statements to override those fake
+# versions also in our go.mod file (idea and some code from
+# https://github.com/kubernetes/kubernetes/issues/79384#issuecomment-521493597).
+mods=$( (set -x; curl --silent --show-error --fail "https://raw.githubusercontent.com/kubernetes/kubernetes/v${k8s}/go.mod") |
+          sed -n 's|.*k8s.io/\(.*\) => ./staging/src/k8s.io/.*|k8s.io/\1|p'
+   ) || die "failed to determine Kubernetes staging modules"
+for mod in $mods; do
+    # The presence of a potentially incomplete go.mod file affects this command,
+    # so move elsewhere.
+    modinfo=$(set -x; cd /; env GO111MODULE=on go mod download -json "$mod@kubernetes-${k8s}") ||
+        die "failed to determine version of $mod: $modinfo"
+    v=$(echo "$modinfo" | sed -n 's|.*"Version": "\(.*\)".*|\1|p')
+    (set -x; env GO111MODULE=on go mod edit "-replace=$mod=$mod@$v") || die "'go mod edit' failed"
+done
+
+packages=
+
+# Beware that we have to work with packages, not modules (i.e. no -m
+# flag), because some modules trigger a "no Go code except tests"
+# error.  Getting their packages works.
+if ! packages=$( (set -x; env GO111MODULE=on go list all) | grep ^k8s.io/ | sed -e 's; *;;'); then
+    cat >&2 <<EOF
+
+Warning: "GO111MODULE=on go list all" failed, trying individual packages instead.
+
+EOF
+    if ! packages=$( (set -x; env GO111MODULE=on go list -f '{{ join .Deps "\n" }}' ./...) | grep ^k8s.io/); then
+        cat >&2 <<EOF
+
+ERROR: could not obtain package list, both of these commands failed:
+       GO111MODULE=on go list all
+       GO111MODULE=on go list -f '{{ join .Deps "\n" }}' ./pkg/...
+EOF
+        exit 1
+    fi
+fi
+
+deps=
+for package in $packages; do
+    # Some k8s.io packages do not come from Kubernetes staging and
+    # thus have different versioning (or none at all...). We need to
+    # skip those.  We know what packages are from staging because we
+    # now have "replace" statements for them in go.mod.
+    #
+    # shellcheck disable=SC2001
+    module=$(echo "$package" | sed -e 's;k8s.io/\([^/]*\)/.*;k8s.io/\1;')
+    if grep -q -w "$module *=>" go.mod; then
+        deps="$deps $(echo "$package" | sed -e "s;\$;@kubernetes-$k8s;" -e 's;^k8s.io/kubernetes\(/.*\)@kubernetes-;k8s.io/kubernetes\1@v;')"
+    fi
+done
+
+# shellcheck disable=SC2086
+(set -x; env GO111MODULE=on go get $deps 2>&1) || die "go get failed"
+echo "SUCCESS"