use gomods; update generated; add CI check for tidy+generate

.github/workflows/relayer.yml

@@ -57,3 +57,21 @@ jobs:
             ./relayer/coverage.txt
             ./relayer/race_coverage.txt
 
+  check-tidy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
+      - name: Set up Go
+        uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
+        with:
+          go-version-file: "relayer/go.mod"
+      - name: Ensure "make gomodtidy" has been run
+        run: |
+          make gomodtidy
+          git diff --exit-code
+      - name: Ensure "make generate" has been run
+        run: |
+          make rm-mocked
+          make generate
+          git diff --stat --exit-code

Makefile

@@ -130,12 +130,25 @@ format-go-fmt:
 	cd ./ops && go fmt ./...
 	cd ./integration-tests && go fmt ./...
 
+.PHONY: gomods
+gomods: ## Install gomods
+	go install github.com/jmank88/gomods@v0.1.3
+
 .PHONY: gomodtidy
-gomodtidy:
-	cd ./relayer && go mod tidy
-	cd ./monitoring && go mod tidy
-	cd ./ops && go mod tidy
-	cd ./integration-tests && go mod tidy
+gomodtidy: gomods
+	gomods tidy
+
+.PHONY: mockery
+mockery: $(mockery) ## Install mockery.
+	go install github.com/vektra/mockery/v2@v2.43.2
+
+.PHONY: rm-mocked
+rm-mocked:
+	grep -rl "^// Code generated by mockery" | grep .go$ | xargs -r rm
+
+.PHONY: generate
+generate: mockery gomods
+	gomods -w go generate -x ./...
 
 .PHONY: format-cairo
 format-cairo: