hack: base build scripts

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

hack/validate-vendor

@@ -0,0 +1,49 @@
+#!/usr/bin/env sh
+
+set -eu
+
+: ${CONTINUOUS_INTEGRATION=}
+: ${DOCKER_BUILDKIT=}
+
+progressFlag=""
+if [ "$CONTINUOUS_INTEGRATION" = "true" ]; then progressFlag="--progress=plain"; fi
+
+case ${1:-} in
+'')
+  . $(dirname $0)/util
+  case $buildmode in
+  "buildkit")
+    buildctl build $progressFlag --frontend=dockerfile.v0 --local context=. --local dockerfile=. --frontend-opt filename=./hack/dockerfiles/vendor.Dockerfile --frontend-opt target=validate
+    ;;
+  "docker-buildkit")
+    export DOCKER_BUILDKIT=1
+    iidfile=$(mktemp -t docker-iidfile.XXXXXXXXXX)
+    docker build --iidfile $iidfile -f ./hack/dockerfiles/vendor.Dockerfile --target validate --force-rm . || exit 1
+    iid=$(cat $iidfile)
+    docker rmi $iid
+    rm -f $iidfile
+    ;;
+  *)
+		echo "buildkit support is required"
+    exit 1
+    ;;
+  esac
+  ;;
+check)
+  status="$(git status --porcelain -- go.mod go.sum vendor 2>/dev/null)"
+  diffs=$(echo "$status" | grep -v '^[RAD] ' || true)
+  if [ "$diffs" ]; then
+      {
+	set +x
+        echo 'The result of "make vendor" differs'
+        echo
+        echo "$diffs"
+        echo
+        echo 'Please vendor your package with "make vendor"'
+        echo
+      } >&2
+      exit 1
+  fi
+  echo 'Congratulations! All vendoring changes are done the right way.'
+  ;;
+esac