build: Only run e2e tests if there are e2e test files

Author: jimmidyson

make/go.mk

@@ -80,7 +80,10 @@ E2E_FLAKE_ATTEMPTS ?= 1
 e2e-test: ## Runs e2e tests
 e2e-test: install-tool.golang install-tool.ginkgo install-tool.gojq
 	$(info $(M) running e2e tests$(if $(E2E_LABEL), labelled "$(E2E_LABEL)")$(if $(E2E_FOCUS), matching "$(E2E_FOCUS)"))
-	$(MAKE) GORELEASER_FLAGS=$$'--config=<(env GOOS=$(shell go env GOOS) GOARCH=$(shell go env GOARCH) gojq --yaml-input --yaml-output \'del(.builds[0].goarch) | del(.builds[0].goos) | .builds[0].targets|=(["linux_amd64","linux_arm64",env.GOOS+"_"+env.GOARCH] | unique | map(. | sub("_amd64";"_amd64_v1")))\' .goreleaser.yml) --rm-dist --skip-validate --skip-publish' release
+ifneq ($(wildcard test/e2e/*),)
+ifneq ($(SKIP_BUILD),true)
+	$(MAKE) GORELEASER_FLAGS=$$'--config=<(env GOOS=$(shell go env GOOS) GOARCH=$(shell go env GOARCH) gojq --yaml-input --yaml-output \'del(.builds[0].goarch) | del(.builds[0].goos) | .builds[0].targets|=(["linux_amd64","linux_arm64",env.GOOS+"_"+env.GOARCH] | unique | map(. | sub("_amd64";"_amd64_v1")))\' .goreleaser.yml) --clean --skip-validate --skip-publish' release
+endif
 	ginkgo run \
 		--r \
 		--race \
@@ -107,6 +110,7 @@ e2e-test: install-tool.golang install-tool.ginkgo install-tool.gojq
 	go tool cover \
 		-html=coverage-e2e.out \
 		-o coverage-e2e.html
+endif
 
 GOLANGCI_CONFIG_FILE ?= $(wildcard $(REPO_ROOT)/.golangci.y*ml)