scripts: copy prow integration from master

Copy all test-infra scripts and cloudbuild.yaml from master.

Also cherry-pick the required poll-image Makefile target.

(copied from commit a08fb66fa7)

Makefile

@@ -104,6 +104,18 @@ push:
 	$(IMAGE_PUSH_CMD) $(IMAGE_TAG)
 	for tag in $(IMAGE_EXTRA_TAGS); do $(IMAGE_PUSH_CMD) $$tag; done
 
+poll-image:
+	set -e; \
+	image=$(IMAGE_REPO):$(IMAGE_TAG_NAME); \
+	base_url=`echo $(IMAGE_REPO) | sed -e s'!\([^/]*\)!\1/v2!'`; \
+	errors=`curl -fsS -X GET https://$$base_url/manifests/$(IMAGE_TAG_NAME)|jq .errors`;  \
+	if [ "$$errors" = "null" ]; then \
+	  echo Image $$image found; \
+	else \
+	  echo Image $$image not found; \
+	  exit 1; \
+	fi;
+
 site-build:
 	@mkdir -p docs/vendor/bundle
 	$(SITE_BUILD_CMD) sh -c "bundle install && jekyll build $(JEKYLL_OPTS)"

cloudbuild.yaml

@@ -0,0 +1,12 @@
+steps:
+  - name: gcr.io/k8s-testimages/gcb-docker-gcloud:v20200824-5d057db
+    entrypoint: scripts/test-infra/push-image.sh
+    env:
+    - IMAGE_REGISTRY=gcr.io/$PROJECT_ID
+    - _GIT_TAG=$_GIT_TAG
+    - IMAGE_EXTRA_TAG_NAMES=$_PULL_BASE_REF
+substitutions:
+  _GIT_TAG: '0.0.0'
+  _PULL_BASE_REF: 'master'
+options:
+  substitution_option: ALLOW_LOOSE

scripts/test-infra/build-gh-pages.sh

@@ -0,0 +1,11 @@
+#!/bin/bash -e
+
+# Pre-create output directory with all write access. The Jekyll docker image is
+# stupid enough to do all sorts of uid/gid/chown magic making build fail for
+# root user. In prow we run as root because of DIND.
+_outdir="docs/_site"
+mkdir -p "$_outdir"
+chmod a+rwx "$_outdir"
+
+# Build docs
+make site-build

scripts/test-infra/build-image.sh

@@ -0,0 +1,3 @@
+#!/bin/bash -e
+
+make image

scripts/test-infra/build.sh

@@ -0,0 +1,3 @@
+#!/bin/bash -e
+
+make build

scripts/test-infra/push-image.sh

@@ -0,0 +1,9 @@
+#!/bin/bash -e
+
+# Override VERSION if _GIT_TAG is specified. Strip 10 first characters
+# ('vYYYYMMDD-') from _GIT_TAG in order to get a reproducible version and
+# container image tag
+VERSION_OVERRIDE=${_GIT_TAG+VERSION=${_GIT_TAG:10}}
+
+make image $VERSION_OVERRIDE
+make push $VERSION_OVERRIDE

scripts/test-infra/test-e2e.sh

@@ -0,0 +1,34 @@
+#!/bin/bash -e
+
+# Install deps
+curl -o $HOME/bin/aws-iam-authenticator --create-dirs https://amazon-eks.s3-us-west-2.amazonaws.com/1.10.3/2018-07-26/bin/linux/amd64/aws-iam-authenticator
+chmod a+x $HOME/bin/aws-iam-authenticator
+export PATH=$PATH:$HOME/bin
+
+
+# Configure environment
+export KUBECONFIG=`pwd`/kubeconfig
+export E2E_TEST_CONFIG=`pwd`/e2e-test-config
+
+echo "$KUBECONFIG_DATA" > "$KUBECONFIG"
+echo "$E2E_TEST_CONFIG_DATA" > "$E2E_TEST_CONFIG"
+
+
+# Wait for the image to be built and published
+i=1
+while true; do
+    if make poll-image; then
+        break
+    elif [ $i -ge 10 ]; then
+        "ERROR: too many tries when polling for image"
+        exit 1
+    fi
+    sleep 60
+
+    i=$(( $i + 1 ))
+done
+
+
+# Configure environment and run tests
+make e2e-test
+

scripts/test-infra/verify.sh

@@ -0,0 +1,9 @@
+#!/bin/bash -e
+
+# Install deps
+curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s -- -b $(go env GOPATH)/bin v1.30.0
+export PATH=$PATH:$(go env GOPATH)/bin
+
+# Run verify steps
+make gofmt-verify
+make ci-lint