Merge pull request #1920 from CosmWasm/co/go-mod-tidy-ci

Add go mod tidy check to CI

.circleci/config.yml

@@ -61,6 +61,23 @@ jobs:
           paths:
             - ".git"
 
+  tidy-go:
+    executor: golang
+    steps:
+      - checkout
+      - run:
+          name: Check go mod tidy
+          # Use --diff when available (Go 1.23)
+          # https://github.com/golang/go/issues/27005
+          command: |
+            go mod tidy
+            CHANGES_IN_REPO=$(git status --porcelain)
+            if [[ -n "$CHANGES_IN_REPO" ]]; then
+              echo "Repository is dirty. Showing 'git status' and 'git --no-pager diff' for debugging now:"
+              git status && git --no-pager diff
+              exit 1
+            fi
+
   lint:
     docker:
       - image: golangci/golangci-lint:v1.54.2
@@ -275,6 +292,9 @@ workflows:
             tags:
               only:
                 - /^v.*/
+      - tidy-go:
+          requires:
+            - setup-dependencies
       - lint:
           requires:
             - setup-dependencies