Copy newer Go into goreleaser image

releasing/cloudbuild.yaml

@@ -37,6 +37,14 @@ steps:
   - checkout
   - $TAG_NAME
 
+# Copy a newer version of Go into the goreleaser workspace.
+# Use the same source image as the builder in kustomize.Dockerfile
+- name: golang:alpine
+  entrypoint: /bin/sh
+  args:
+  - '-c'
+  - 'mkdir -p /workspace/bin && cp $(go env GOROOT)/bin/go /workspace/bin'
+
 # Run goreleaser indirectly via a shell script
 # to configure it properly.
 - name: goreleaser/goreleaser:v0.179.0
@@ -44,6 +52,8 @@ steps:
   entrypoint: /bin/sh
   dir: myClone
   secretEnv: ['GITHUB_TOKEN']
+  env:
+  - 'GO_BINARY_PATH=/workspace/bin/go'
   args:
   - releasing/cloudbuild.sh
   - $TAG_NAME

releasing/run-goreleaser.sh

@@ -51,6 +51,16 @@ echo "module=$module"
 semVer=${fullTag#$module/}
 echo "semVer=$semVer"
 
+# Because of https://github.com/kubernetes-sigs/kustomize/issues/4542
+# we need to manually install a newer version of Go into an older goreleaser image.
+# This points goreleaser to that version of Go, or the version discovered from PATH if unspecified.
+goBinary="go"
+if [[ -n "${GO_BINARY_PATH:-}" ]]; then
+    echo "GO_BINARY_PATH is set, using go version from $GO_BINARY_PATH"
+    goBinary="$GO_BINARY_PATH"
+fi
+sh -c "$goBinary version"
+
 # Generate the changelog for this release
 # using the last two tags for the module
 changeLogFile=$(mktemp)
@@ -101,6 +111,8 @@ builds:
     -X sigs.k8s.io/kustomize/api/provenance.gitCommit={{.Commit}}
     -X sigs.k8s.io/kustomize/api/provenance.buildDate={{.Date}}
 
+  gobinary: ${goBinary}
+
   goos:
   - linux
   - darwin