feat(ci): rebuild openapi client code in CI and check for differences

This ensures that we fail CI if the openapi client code that's commited to git is different than what the current code would generate

.travis.yml

@@ -107,6 +107,18 @@ jobs:
       <<: *DEFAULTS_JS
       script: make lint-docs
 
+    - stage: Lint
+      name: Verify OpenAPI client code
+      if: (repo = prymitive/karma AND type != pull_request) OR (repo != prymitive/karma AND type = pull_request)
+      language: generic
+      addons:
+        apt:
+          packages:
+            - docker-ce
+      script:
+        - travis_retry make openapi-client
+        - git diff --exit-code
+
     - stage: Snapshots
       name: Percy UI snapshots
       if: (repo = prymitive/karma AND type != pull_request) OR (repo != prymitive/karma AND type = pull_request)

Makefile

@@ -167,6 +167,10 @@ format-go: .build/deps-build-go.ok
 format-js: .build/deps-build-node.ok
 	cd ui && ./node_modules/.bin/prettier --write 'src/**/*.js'
 
+.PHONY: openapi-client
+openapi-client:
+	for f in $(wildcard internal/mapper/*/Dockerfile) ; do $(MAKE) -C `dirname "$$f"` ; done
+
 .PHONY: show-version
 show-version:
 	@echo $(VERSION)