Automated cherry pick of #115377: Fetch go version using gimme if needed

LICENSES/third_party/gimme/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015-2018 gimme contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

build/common.sh

@@ -526,6 +526,8 @@ function kube::build::run_build_command_ex() {
     --env "KUBE_BUILD_WITH_COVERAGE=${KUBE_BUILD_WITH_COVERAGE:-}"
     --env "KUBE_BUILD_PLATFORMS=${KUBE_BUILD_PLATFORMS:-}"
     --env "KUBE_CGO_OVERRIDES=' ${KUBE_CGO_OVERRIDES[*]:-} '"
+    --env "FORCE_HOST_GO=${FORCE_HOST_GO:-}"
+    --env "GO_VERSION=${GO_VERSION:-}"
     --env "GOFLAGS=${GOFLAGS:-}"
     --env "GOGCFLAGS=${GOGCFLAGS:-}"
     --env "SOURCE_DATE_EPOCH=${SOURCE_DATE_EPOCH:-}"

hack/.spelling_failures

@@ -1,5 +1,6 @@
 CHANGELOG
 go.mod
 go.sum
+third_party/
 translations/
 vendor/

hack/jenkins/test-dockerized.sh

@@ -48,7 +48,6 @@ export LOG_LEVEL=4
 cd "${GOPATH}/src/k8s.io/kubernetes"
 
 make generated_files
-go install ./cmd/...
 ./hack/install-etcd.sh
 
 make test-cmd

hack/lib/golang.sh

@@ -470,7 +470,21 @@ kube::golang::create_gopath_tree() {
 }
 
 # Ensure the go tool exists and is a viable version.
+# Inputs:
+#   env-var GO_VERSION is the desired go version to use, downloading it if needed (defaults to content of .go-version)
+#   env-var FORCE_HOST_GO set to a non-empty value uses the go version in the $PATH and skips ensuring $GO_VERSION is used
 kube::golang::verify_go_version() {
+  # default GO_VERSION to content of .go-version
+  GO_VERSION="${GO_VERSION:-"$(cat "${KUBE_ROOT}/.go-version")"}"
+  # only setup go if we haven't set FORCE_HOST_GO, or `go version` doesn't match GO_VERSION
+  if ! ([ -n "${FORCE_HOST_GO:-}" ] || \
+      (command -v go >/dev/null && [ "$(go version | cut -d' ' -f3)" = "go${GO_VERSION}" ])); then
+      export GIMME_ENV_PREFIX=${GIMME_ENV_PREFIX:-"${KUBE_OUTPUT}/.gimme/envs"}
+      export GIMME_VERSION_PREFIX=${GIMME_VERSION_PREFIX:-"${KUBE_OUTPUT}/.gimme/versions"}
+      # eval because the output of this is shell to set PATH etc.
+      eval "$("${KUBE_ROOT}/third_party/gimme/gimme" "${GO_VERSION}")"
+  fi
+
   if [[ -z "$(command -v go)" ]]; then
     kube::log::usage_from_stdin <<EOF
 Can't find 'go' in PATH, please fix and retry.

third_party/gimme/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015-2018 gimme contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

third_party/gimme/README.md

@@ -0,0 +1,6 @@
+# gimme
+
+This is an unmodified copy of [gimme], so we don't have to download it
+from the internet.
+
+[gimme]: https://github.com/travis-ci/gimme