chore: add golangci lint

.github/workflows/ci.yml

@@ -23,6 +23,19 @@ jobs:
             cache-dependency-path: ./go.sum
         id: go
 
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@3a919529898de77ec3da873e3063ca4b10e7f5cc # v3
+        with:
+          # Optional: version of golangci-lint to use in form of v1.2 or v1.2.3 or `latest` to use the latest version
+          version: v1.55.2
+          # Optional: working directory, useful for monorepos
+          working-directory: .
+          # Optional: golangci-lint command line arguments.
+          args: --verbose
+          # Optional: if set to true then the all caching functionality will be complete disabled,
+          #           takes precedence over all other caching options.
+          skip-cache: true
+
       - name: Build
         run: go build ./...
 

.golangci.yml

@@ -0,0 +1,27 @@
+linters:
+  enable:
+    - errorlint
+    - gci
+    - gocritic
+    - gofumpt
+    - misspell
+    - nonamedreturns
+
+linters-settings:
+  errorlint:
+    # Check whether fmt.Errorf uses the %w verb for formatting errors.
+    # See the https://github.com/polyfloyd/go-errorlint for caveats.
+    errorf: true
+    # Permit more than 1 %w verb, valid per Go 1.20 (Requires errorf:true)
+    errorf-multi: true
+    # Check for plain type assertions and type switches.
+    asserts: true
+    # Check for plain error comparisons.
+    comparison: true
+  gci:
+    sections:
+      - standard
+      - default
+      - prefix(github.com/testcontainers)
+run:
+  timeout: 5m

examples_test.go

@@ -17,8 +17,8 @@ func ExampleSelfSigned() {
 	certsDir := tmp + "/certs"
 	defer os.RemoveAll(certsDir)
 
-	if err := os.MkdirAll(certsDir, 0755); err != nil {
-		log.Fatal(err)
+	if err := os.MkdirAll(certsDir, 0o755); err != nil {
+		log.Fatal(err) // nolint: gocritic
 	}
 
 	// Generate a certificate for localhost and save it to disk.
@@ -51,7 +51,10 @@ func ExampleSelfSigned() {
 
 	server.Handler = http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 		w.Header().Set("Content-Type", "text/plain")
-		w.Write([]byte("TLS works!\n"))
+		_, err := w.Write([]byte("TLS works!\n"))
+		if err != nil {
+			log.Printf("Failed to write response: %v", err)
+		}
 	})
 
 	go func() {
@@ -90,5 +93,4 @@ func ExampleSelfSigned() {
 
 	// Output:
 	// TLS works!
-
 }