BUILD/MINOR: add checks if the code is formatted

Author: oktalz

.github/workflows/lint.yml

@@ -4,6 +4,28 @@ on:
     branches:
       - master
 jobs:
+  gofumpt:
+    name: gofumpt
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v2
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.19
+      - uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cache/go-build
+            ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+      - name: tidy
+        run: make gofumpt
+      - name: changes
+        run: test -z "$(git diff 2> /dev/null)" || exit "Go code not formatted, issue \`make gofumpt\` and commit the result"
   golangci-lint:
     name: golangci-lint
     runs-on: ubuntu-latest

.gitlab-ci.yml

@@ -27,7 +27,6 @@ diff:
     - make generate-native
     - test -z "$(git diff 2> /dev/null)" || exit "Specification is not generated, issue \`make generate\` and commit the result"
     - test -z "$(git ls-files --others --exclude-standard 2> /dev/null)" || exit "Specification generation created untracked files, cannot proceed"
-
 golangci-lint:
   stage: lint
   artifacts:
@@ -43,6 +42,19 @@ golangci-lint:
   rules:
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
     - if: $CI_PIPELINE_SOURCE == 'push'
+gofumpt:
+  stage: lint
+  rules:
+    - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+    - if: $CI_PIPELINE_SOURCE == 'push'
+  image:
+    name: $CI_REGISTRY_GO/golang:1.19
+    entrypoint: [""]
+  tags:
+    - go
+  script:
+    - make gofumpt
+    - test -z "$(git diff 2> /dev/null)" || exit 'Go code not formatted, issue \`make gofumpt\` and commit the result'
 lint-commit-msg:
   stage: lint
   image:

Makefile

@@ -21,6 +21,11 @@ lint:
 	cd bin;GOLANGCI_LINT_VERSION=${GOLANGCI_LINT_VERSION} sh lint-check.sh
 	bin/golangci-lint run --timeout 5m --color always --max-issues-per-linter 0 --max-same-issues 0
 
+.PHONY: gofumpt
+gofumpt:
+	go install mvdan.cc/gofumpt@latest
+	gofumpt -l -w .
+
 clean:
 	rm -rf ${DATAPLANEAPI_PATH}/build