Bake workflow

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

hack/dockerfiles/vendor.Dockerfile

@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.3
+# syntax=docker/dockerfile:1.3-labs
 
 ARG GO_VERSION=1.17.0
 
@@ -6,20 +6,30 @@ FROM golang:${GO_VERSION}-alpine AS vendored
 RUN  apk add --no-cache git rsync
 WORKDIR /src
 RUN --mount=target=/context \
-  --mount=target=.,type=tmpfs,readwrite  \
-  --mount=target=/go/pkg/mod,type=cache \
-  rsync -a /context/. . && \
-  go mod tidy && go mod vendor && \
-  mkdir /out && cp -r go.mod go.sum vendor /out
+  --mount=target=.,type=tmpfs  \
+  --mount=target=/go/pkg/mod,type=cache <<EOT
+set -e
+rsync -a /context/. .
+go mod tidy
+go mod vendor
+mkdir /out
+cp -r go.mod go.sum vendor /out
+EOT
 
 FROM scratch AS update
 COPY --from=vendored /out /out
 
 FROM vendored AS validate
 RUN --mount=target=/context \
-  --mount=target=.,type=tmpfs,readwrite  \
-  rsync -a /context/. . && \
-  git add -A && \
-  rm -rf vendor && \
-  cp -rf /out/* . && \
-  ./hack/validate-vendor check
+  --mount=target=.,type=tmpfs <<EOT
+set -e
+rsync -a /context/. .
+git add -A
+rm -rf vendor
+cp -rf /out/* .
+if [ -n "$(git status --porcelain -- go.mod go.sum vendor)" ]; then
+  echo >&2 'ERROR: Vendor result differs. Please vendor your package with "make vendor"'
+  git status --porcelain -- go.mod go.sum vendor
+  exit 1
+fi
+EOT