check autogenerated modules in travis

.travis.yml

@@ -5,6 +5,13 @@ go:
 before_install:
   - go get github.com/mattn/goveralls
   - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.15.0
+  - env GO111MODULE=on go get ./cmd/goqueryset
 script:
   - env GO111MODULE=on make test
   - env GO111MODULE=on $HOME/gopath/bin/goveralls -ignore "internal/queryset/generator/test/autogenerated_models.go,examples/comparison/*/*.go,internal/queryset/generator/test/pkgimport/*.go,internal/queryset/generator/test/pkgimport/*/*/*.go" -v -service=travis-ci
+  - make clean_autogenerated
+  - env GO111MODULE=on make gen
+  - test -z "$(git status -s)" && exit 0
+  - echo "Folowing modules should be regenerated:\n$(git status -s)\n"
+  - echo "Call 'make gen' to fix this issue."
+  - exit 1

Makefile

@@ -24,3 +24,6 @@ gen:
 	@- $(foreach F,$(AUTOGEN_FILES), \
 		go generate $$(dirname $F); \
 	)
+
+clean_autogenerated:
+	@rm -f $(AUTOGEN_FILES)