Add golangci-lint

- Add golangci.yaml config file
- Add Makefile lint target to golangci-lint
- Add GitHub action

Related to issue #288

Signed-off-by: Fred Rolland <frolland@nvidia.com>

.github/workflows/go.yml

@@ -42,3 +42,18 @@ jobs:
     - name: test controllers on opensfhit
       run: CLUSTER_TYPE=openshift make test-controllers
 
+  golangci:
+    name: Golangci-lint
+    runs-on: ubuntu-latest
+    steps:
+    - name: Set up Go 1.17
+      uses: actions/setup-go@v2
+      with:
+        go-version: 1.17.8
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v2
+    - name: golangci-lint
+      uses: golangci/golangci-lint-action@v3
+      with:
+        # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
+        version: v1.37

.golangci.yml

@@ -0,0 +1,119 @@
+# Tested with golangci-lint ver. 1.37
+run:
+  timeout: 3m
+  skip-dirs:
+    - vendor/
+    - .github/
+    - deployment/
+    - doc/
+    - bindata/
+linters-settings:
+  depguard:
+    list-type: blacklist
+    packages:
+      # logging is allowed only by logutils.Log, logrus
+      # is allowed to use only in logutils package
+      - github.com/sirupsen/logrus
+    packages-with-error-message:
+      - github.com/sirupsen/logrus: "logging is allowed only by logutils.Log"
+  dupl:
+    threshold: 100
+  funlen:
+    lines: 100
+    statements: 50
+  goconst:
+    min-len: 2
+    min-occurrences: 2
+  gocritic:
+    enabled-tags:
+      - diagnostic
+      - experimental
+      - opinionated
+      - performance
+      - style
+    disabled-checks:
+      - dupImport # https://github.com/go-critic/go-critic/issues/845
+      - ifElseChain
+      - octalLiteral
+      - whyNoLint
+      - wrapperFunc
+      - unnamedResult
+    settings:
+      hugeParam:
+        sizeThreshold: 512
+      rangeValCopy:
+        sizeThreshold: 512
+  gocyclo:
+    min-complexity: 15
+  goimports:
+    local-prefixes: github.com/k8snetworkplumbingwg/sriov-network-device-plugin
+  gomnd:
+    settings:
+      mnd:
+        # don't include the "operation" and "assign"
+        checks: argument,case,condition,return
+  lll:
+    line-length: 140
+  misspell:
+    locale: US
+  prealloc:
+    # Report preallocation suggestions only on simple loops that have no returns/breaks/continues/gotos in them.
+    # True by default.
+    simple: true
+    range-loops: true # Report preallocation suggestions on range loops, true by default
+    for-loops: false # Report preallocation suggestions on for loops, false by default
+
+linters:
+  # please, do not use `enable-all`: it's deprecated and will be removed soon.
+  # inverted configuration with `enable-all` and `disable` is not scalable during updates of golangci-lint
+  disable-all: true
+  enable:
+    - bodyclose
+    - deadcode
+    - depguard
+    - dogsled
+    - dupl
+    - errcheck
+    - exportloopref
+    - exhaustive
+    - funlen
+      #- gochecknoinits
+    - goconst
+    - gocritic
+    - gocyclo
+    - gofmt
+    - goimports
+    - gomnd
+    - goprintffuncname
+    - gosec
+    - gosimple
+      #- govet
+    - ineffassign
+    - lll
+    - misspell
+    - nakedret
+    - prealloc
+    - rowserrcheck
+      #- scopelint
+    - staticcheck
+    - structcheck
+    - stylecheck
+    - typecheck
+    - unconvert
+    - unparam
+    - unused
+    - varcheck
+    - whitespace
+
+issues:
+  # Excluding configuration per-path, per-linter, per-text and per-source
+  exclude-rules:
+    - path: _test\.go
+      linters:
+        - gomnd
+        - gosec
+        - dupl
+        - lll
+        - stylecheck
+        - goconst
+

Makefile

@@ -53,6 +53,15 @@ else
 GOBIN=$(shell go env GOBIN)
 endif
 
+GOLANGCI_LINT = $(GOBIN)/golangci-lint
+# golangci-lint version should be updated periodically
+# we keep it fixed to avoid it from unexpectedly failing on the project
+# in case of a version bump
+GOLANGCI_LINT_VER = v1.37.0
+TIMEOUT = 15
+Q = $(if $(filter 1,$V),,@)
+
+
 .PHONY: all build clean gendeepcopy test test-e2e test-e2e-k8s run image fmt sync-manifests test-e2e-conformance manifests update-codegen
 
 all: generate vet build plugins
@@ -229,3 +238,14 @@ undeploy-k8s: undeploy
 deps-update:
 	go mod tidy && \
 	go mod vendor
+
+$(GOLANGCI_LINT): $(info  building golangci-lint...)
+	$Q curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(GOBIN) $(GOLANGCI_LINT_VER)
+
+.PHONY: lint
+lint: | $(GOLANGCI_LINT) ; $(info  running golangci-lint...) @ ## Run golangci-lint
+	$Q mkdir -p $(CURPATH)/test-lint
+	$Q cd $(CURPATH) && ret=0 && \
+		test -z "$$($(GOLANGCI_LINT) run | tee $(CURPATH)/test-lint/lint.out)" || ret=1 ; \
+		cat $(CURPATH)/test-lint/lint.out ; rm -rf $(CURPATH)/test-lint ; \
+	 exit $$ret