test: opt to avoid building the integration tests image

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

hack/test

@@ -3,35 +3,25 @@
 set -eu -o pipefail
 
 : "${BUILDX_CMD=docker buildx}"
-: "${CACHE_FROM=}"
+
-: "${CACHE_TO=}"
+: "${TEST_IMAGE_BUILD=1}"
+: "${TEST_IMAGE_ID=buildx-tests}"
 
 : "${TEST_REPORT_SUFFIX=}"
 : "${TEST_KEEP_CACHE=}"
 : "${TEST_DOCKERD=}"
 : "${TEST_BUILDKIT_IMAGE=}"
 
-if [ -n "$CACHE_FROM" ]; then
+if [ "$TEST_IMAGE_BUILD" = "1" ]; then
-  for cfrom in $CACHE_FROM; do
+  ${BUILDX_CMD} bake integration-test --set "*.output=type=docker,name=$TEST_IMAGE_ID"
-    setFlags+=(--set "*.cache-from=$cfrom")
-  done
-fi
-if [ -n "$CACHE_TO" ]; then
-  for cto in $CACHE_TO; do
-    setFlags+=(--set "*.cache-to=$cto")
-  done
 fi
 
-iid="buildx-tests"
-
 testReportsDir="$(pwd)/bin/testreports"
 mkdir -p "$testReportsDir"
 testReportsVol="-v $testReportsDir:/testreports"
 gotestsumArgs="--format=standard-verbose --jsonfile=/testreports/go-test-report$TEST_REPORT_SUFFIX.json --junitfile=/testreports/junit-report$TEST_REPORT_SUFFIX.xml"
 gotestArgs="-mod=vendor -coverprofile=/testreports/coverage-report$TEST_REPORT_SUFFIX.txt -covermode=atomic"
 
-${BUILDX_CMD} bake integration-test "${setFlags[@]}" --set "*.output=type=docker,name=$iid"
-
 cacheVolume="buildx-test-cache"
 if ! docker container inspect "$cacheVolume" >/dev/null 2>/dev/null; then
   docker create -v /root/.cache -v /root/.cache/registry -v /go/pkg/mod --name "$cacheVolume" alpine
@@ -40,5 +30,5 @@ if [ "$TEST_KEEP_CACHE" != "1" ]; then
   trap 'docker rm -v $cacheVolume' EXIT
 fi
 
-cid=$(docker create --rm -v /tmp $testReportsVol --volumes-from=$cacheVolume -e GITHUB_REF -e TEST_DOCKERD -e TEST_BUILDKIT_IMAGE -e SKIP_INTEGRATION_TESTS -e GOTESTSUM_FORMAT ${BUILDKIT_INTEGRATION_SNAPSHOTTER:+"-eBUILDKIT_INTEGRATION_SNAPSHOTTER"} -e BUILDKIT_REGISTRY_MIRROR_DIR=/root/.cache/registry --privileged $iid gotestsum $gotestsumArgs --packages="${TESTPKGS:-./...}" -- $gotestArgs ${TESTFLAGS:--v})
+cid=$(docker create --rm -v /tmp $testReportsVol --volumes-from=$cacheVolume -e GITHUB_REF -e TEST_DOCKERD -e TEST_BUILDKIT_IMAGE -e SKIP_INTEGRATION_TESTS -e GOTESTSUM_FORMAT ${BUILDKIT_INTEGRATION_SNAPSHOTTER:+"-eBUILDKIT_INTEGRATION_SNAPSHOTTER"} -e BUILDKIT_REGISTRY_MIRROR_DIR=/root/.cache/registry --privileged $TEST_IMAGE_ID gotestsum $gotestsumArgs --packages="${TESTPKGS:-./...}" -- $gotestArgs ${TESTFLAGS:--v})
 docker start -a -i $cid