enable linter on repository

.github/workflows/lint.yml

@@ -0,0 +1,15 @@
+name: golangci-lint
+on:
+  pull_request:
+jobs:
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.24
+      - name: golangci-lint
+        run: make lint

.gitignore

@@ -1,4 +1,5 @@
 /bin/
+.bin
 /test/bin/
 /*.tar.gz*
 ci.env

.golangci.yml

@@ -0,0 +1,27 @@
+version: "2"
+run:
+  tests: true
+#  build-tags:
+#    - journald
+linters:
+  default: none
+  enable:
+    - ineffassign
+  exclusions:
+    generated: lax
+    paths:
+      - vendor
+      - third_party
+      - third_party$
+      - builtin$
+      - examples$
+issues:
+  max-issues-per-linter: 0
+  max-same-issues: 0
+formatters:
+  exclusions:
+    generated: lax
+    paths:
+      - third_party$
+      - builtin$
+      - examples$

.pre-commit-config.yaml

@@ -4,7 +4,7 @@ repos:
   hooks:
   - id: gitleaks
 - repo: https://github.com/golangci/golangci-lint
-  rev: v1.52.2
+  rev: v2.3.1
   hooks:
   - id: golangci-lint
 - repo: https://github.com/jumanjihouse/pre-commit-hooks

Makefile

@@ -15,7 +15,7 @@
 # Build the node-problem-detector image.
 
 .PHONY: all \
-        vet fmt version test e2e-test \
+        lint vet fmt version test e2e-test \
         build-binaries build-container build-tar build \
         docker-builder build-in-docker \
         push-container push-tar push release clean depup \
@@ -113,6 +113,18 @@ else
 	LOGCOUNTER=*dont-include-log-counter
 endif
 
+GOLANGCI_LINT_VERSION := v2.2.0
+GOLANGCI_LINT := ./.bin/golangci-lint
+
+lint: $(GOLANGCI_LINT)
+	$(GOLANGCI_LINT) run --config .golangci.yml ./...
+
+$(GOLANGCI_LINT):
+	@echo "golangci-lint not found, downloading..."
+	@mkdir -p ./.bin
+	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b ./.bin $(GOLANGCI_LINT_VERSION)
+
+
 vet:
 	go list -tags "$(HOST_PLATFORM_BUILD_TAGS)" ./... | \
 		grep -v "./vendor/*" | \

pkg/logcounter/types/types.go

@@ -14,8 +14,10 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
+// Package types contains the types for log counter.
 package types
 
+// LogCounter is the interface for a log counter.
 type LogCounter interface {
 	Count() (int, error)
 }

pkg/systemstatsmonitor/cpu_collector_unix.go

@@ -62,6 +62,10 @@ func (cc *cpuCollector) recordSystemStats() {
 	}
 
 	fs, err := procfs.NewFS(cc.procPath)
+	if err != nil {
+		klog.Errorf("Failed to open procfs: %v", err)
+		return
+	}
 	stats, err := fs.Stat()
 	if err != nil {
 		klog.Errorf("Failed to retrieve cpu/process stats: %v", err)

pkg/systemstatsmonitor/net_collector.go

@@ -219,6 +219,10 @@ func (nc *netCollector) mustRegisterMetric(metricID metrics.MetricID, descriptio
 
 func (nc *netCollector) recordNetDev() {
 	fs, err := procfs.NewFS(nc.procPath)
+	if err != nil {
+		klog.Errorf("Failed to open procfs: %v", err)
+		return
+	}
 	stats, err := fs.NetDev()
 	if err != nil {
 		klog.Errorf("Failed to retrieve net dev stat: %v", err)