Kubernetes master changed the way that releases are tagged, which needed

changes to kind. There are 3 changes made to prow.sh:

1. Use a master commit of kind that includes the fix for Kubernetes
master.
2. Use git clone instead of git checkout (shallow) to source Kubernetes.
This lets kind correctly figure out the Kubernetes release tag.
3. Build kind with make install. The kind fix was not working correctly
when built with go build.

Author: msau42

prow.sh

@@ -101,7 +101,7 @@ configvar CSI_PROW_GO_VERSION_GINKGO "${CSI_PROW_GO_VERSION_BUILD}" "Go version
 # kind version to use. If the pre-installed version is different,
 # the desired version is downloaded from https://github.com/kubernetes-sigs/kind/releases/download/
 # (if available), otherwise it is built from source.
-configvar CSI_PROW_KIND_VERSION v0.4.0 "kind"
+configvar CSI_PROW_KIND_VERSION 2555d8e09d5a77ee718414cec9f6083dfa028dc5 "kind"
 
 # ginkgo test runner version to use. If the pre-installed version is
 # different, the desired version is built from source.
@@ -379,8 +379,8 @@ install_kind () {
     if run curl --fail --location -o "${CSI_PROW_WORK}/bin/kind" "https://github.com/kubernetes-sigs/kind/releases/download/${CSI_PROW_KIND_VERSION}/kind-linux-amd64"; then
         chmod u+x "${CSI_PROW_WORK}/bin/kind"
     else
-        git_checkout https://github.com/kubernetes-sigs/kind "$GOPATH/src/sigs.k8s.io/kind" "${CSI_PROW_KIND_VERSION}" --depth=1 &&
-        run_with_go "${CSI_PROW_GO_VERSION_KIND}" go build -o "${CSI_PROW_WORK}/bin/kind" sigs.k8s.io/kind
+        git_checkout https://github.com/kubernetes-sigs/kind "${GOPATH}/src/sigs.k8s.io/kind" "${CSI_PROW_KIND_VERSION}" --depth=1 &&
+        (cd "${GOPATH}/src/sigs.k8s.io/kind" && make install INSTALL_DIR="${CSI_PROW_WORK}/bin")
     fi
 }
 
@@ -427,6 +427,27 @@ git_checkout () {
     (cd "$path" && run git clean -fdx) || die "failed to clean $path"
 }
 
+# This clones a repo ("https://github.com/kubernetes/kubernetes")
+# in a certain location ("$GOPATH/src/k8s.io/kubernetes") at
+# a the head of a specific branch (i.e., release-1.13, master).
+# The directory cannot exist.
+git_clone_branch () {
+    local repo path branch parent
+    repo="$1"
+    shift
+    path="$1"
+    shift
+    branch="$1"
+    shift
+
+    parent="$(dirname "$path")"
+    mkdir -p "$parent"
+    (cd "$parent" && run git clone --single-branch --branch "$branch" "$repo" "$path") || die "cloning $repo" failed
+    # This is useful for local testing or when switching between different revisions in the same
+    # repo.
+    (cd "$path" && run git clean -fdx) || die "failed to clean $path"
+}
+
 list_gates () (
     set -f; IFS=','
     # Ignore: Double quote to prevent globbing and word splitting.
@@ -472,25 +493,10 @@ start_cluster () {
             if [ "$version" = "latest" ]; then
                 version=master
             fi
-            git_checkout https://github.com/kubernetes/kubernetes "$GOPATH/src/k8s.io/kubernetes" "$version" --depth=1 || die "checking out Kubernetes $version failed"
-
-            # "kind build" and/or the Kubernetes build rules need at least one tag, which we don't have
-            # when doing a shallow fetch. Therefore we fake one:
-            # release-1.12 -> v1.12.0-release.<rev>.csiprow
-            # latest or <revision> -> v1.14.0-<rev>.csiprow
-            case "${CSI_PROW_KUBERNETES_VERSION}" in
-                release-*)
-                    # Ignore: See if you can use ${variable//search/replace} instead.
-                    # shellcheck disable=SC2001
-                    tag="$(echo "${CSI_PROW_KUBERNETES_VERSION}" | sed -e 's/release-\(.*\)/v\1.0-release./')";;
-                *)
-                    # We have to make something up. v1.0.0 did not work for some reasons.
-                    tag="v999.999.999-";;
-            esac
-            tag="$tag$(cd "$GOPATH/src/k8s.io/kubernetes" && git rev-list --abbrev-commit HEAD).csiprow"
-            (cd "$GOPATH/src/k8s.io/kubernetes" && run git tag -f "$tag") || die "git tag failed"
-            go_version="$(go_version_for_kubernetes "$GOPATH/src/k8s.io/kubernetes" "$version")" || die "cannot proceed without knowing Go version for Kubernetes"
-            run_with_go "$go_version" kind build node-image --type bazel --image csiprow/node:latest --kube-root "$GOPATH/src/k8s.io/kubernetes" || die "'kind build node-image' failed"
+            git_clone_branch https://github.com/kubernetes/kubernetes "${CSI_PROW_WORK}/src/kubernetes" "$version" || die "checking out Kubernetes $version failed"
+
+            go_version="$(go_version_for_kubernetes "${CSI_PROW_WORK}/src/kubernetes" "$version")" || die "cannot proceed without knowing Go version for Kubernetes"
+            run_with_go "$go_version" kind build node-image --type bazel --image csiprow/node:latest --kube-root "${CSI_PROW_WORK}/src/kubernetes" || die "'kind build node-image' failed"
             csi_prow_kind_have_kubernetes=true
         fi
         image="csiprow/node:latest"