chore: Switch to golangci-lint

.github/workflows/reviewdog.yml

@@ -12,13 +12,16 @@ jobs:
         with:
           go-version-file: "go.mod"
         id: go
-      - name: Install linters
-        run: "( mkdir linters && cd linters && go get golang.org/x/lint/golint )"
+      - name: Install golangci-lint
+        run: |
+          # binary will be $(go env GOPATH)/bin/golangci-lint
+          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.46.2
       - uses: reviewdog/[email protected]
         with:
           reviewdog_version: latest
       - name: Run reviewdog
         env:
           REVIEWDOG_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GO111MODULE: "off" # required for golangci-lint - see https://github.com/keptn/keptn/issues/4000 / https://github.com/golangci/golangci-lint/issues/1833
         run: |
           reviewdog -reporter=github-pr-review

.reviewdog.yml

@@ -1,12 +1,9 @@
 runner:
-  golint:
-    cmd: golint ./...
+  gofmt:
+    cmd: gofmt -l .
     errorformat:
       - "%f:%l:%c: %m"
-    level: warning
-  gofmt:
-    cmd: gofmt -l -s .|xargs -I{} echo {}:1 file {} is not gofmted
+  golangci-lint:
+    cmd: golangci-lint run -E bodyclose,exportloopref,funlen,gocyclo,gosec,nestif,unparam --out-format=line-number ./...
     errorformat:
-      - "%f:%l %m"
-  govet:
-    cmd: go vet -all ./...
+      - "%f:%l:%c: %m"