makefile+travis: add mod check and tidy and check modules in travis

Author: carlaKC

.travis.yml

@@ -23,7 +23,7 @@ sudo: required
 
 script:
   - export GO111MODULE=on
-  - make lint unit build
+  - make lint unit build mod-check
 
 after_script:
   - echo "Uploading to termbin.com..." && find *.log | xargs -I{} sh -c "cat {} | nc termbin.com 9999 | xargs -r0 printf '{} uploaded to %s'"

Makefile

@@ -7,6 +7,7 @@ GOTEST := GO111MODULE=on go test -v
 GO_BIN := ${GOPATH}/bin
 GOBUILD := GO111MODULE=on go build -v
 GOINSTALL := GO111MODULE=on go install -v
+GOMOD := GO111MODULE=on go mod
 
 COMMIT := $(shell git describe --abbrev=40 --dirty)
 LDFLAGS := -ldflags "-X $(PKG)/build.Commit=$(COMMIT)"
@@ -26,6 +27,12 @@ TEST_FLAGS = -test.timeout=20m
 
 UNIT := $(GOLIST) | $(XARGS) env $(GOTEST) $(TEST_FLAGS)
 
+GREEN := "\\033[0;32m"
+NC := "\\033[0m"
+define print
+	echo $(GREEN)$1$(NC)
+endef
+
 $(LINT_BIN):
 	@$(call print, "Fetching linter")
 	$(DEPGET) $(LINT_PKG)@$(LINT_COMMIT)
@@ -42,6 +49,15 @@ lint: $(LINT_BIN)
 	@$(call print, "Linting source.")
 	$(LINT)
 
+mod-tidy:
+	@$(call print, "Tidying modules.")
+	$(GOMOD) tidy
+
+mod-check:
+	@$(call print, "Checking modules.")
+	$(GOMOD) tidy
+	if test -n "$$(git status | grep -e "go.mod\|go.sum")"; then echo "Running go mod tidy changes go.mod/go.sum"; git status; git diff; exit 1; fi
+
 # ============
 # INSTALLATION
 # ============