chore: add linter to ci

Co-authored-by: GitHub <noreply@github.com>

.github/workflows/ci.yml

@@ -49,6 +49,11 @@ jobs:
         run: |
           cp -r frontend/dist internal/assets/dist
 
+      - name: Lint backend
+        uses: golangci/golangci-lint-action@v9
+        with:
+          version: v2.12
+
       - name: Run tests
         run: go test -coverprofile=coverage.txt -v ./...
 

.golangci.yml

@@ -0,0 +1,17 @@
+version: "2"
+linters:
+  settings:
+    errcheck:
+      exclude-functions:
+        - (http.ResponseWriter).Write
+        - (http.ResponseWriter).WriteString
+        - (github.com/gin-gonic/gin.ResponseWriter).Write
+        - (github.com/gin-gonic/gin.ResponseWriter).WriteString
+  exclusions:
+    rules:
+      - linters:
+          - errcheck
+        text: "//nolint:errcheck"
+      - linters:
+          - staticcheck
+        text: "//nolint:staticcheck"

cmd/tinyauth/generate_totp.go

@@ -68,10 +68,7 @@ func generateTotpCmd() *cli.Command {
 				return fmt.Errorf("failed to parse user: %w", err)
 			}
 
-			docker := false
-			if strings.Contains(tCfg.User, "$$") {
-				docker = true
-			}
+			docker := strings.Contains(tCfg.User, "$$")
 
 			if user.TOTPSecret != "" {
 				return fmt.Errorf("user already has a TOTP secret")

cmd/tinyauth/healthcheck.go

@@ -9,8 +9,8 @@ import (
 	"os"
 	"time"
 
-	"github.com/tinyauthapp/tinyauth/internal/utils/tlog"
 	"github.com/tinyauthapp/paerser/cli"
+	"github.com/tinyauthapp/tinyauth/internal/utils/tlog"
 )
 
 type healthzResponse struct {
@@ -45,7 +45,7 @@ func healthcheckCmd() *cli.Command {
 			}
 
 			if appUrl == "" {
-				return errors.New("Could not determine app URL")
+				return errors.New("could not determine app url")
 			}
 
 			tlog.App.Info().Str("app_url", appUrl).Msg("Performing health check")
@@ -70,7 +70,7 @@ func healthcheckCmd() *cli.Command {
 				return fmt.Errorf("service is not healthy, got: %s", resp.Status)
 			}
 
-			defer resp.Body.Close()
+			defer resp.Body.Close() //nolint:errcheck
 
 			var healthResp healthzResponse
 

internal/bootstrap/app_bootstrap.go

@@ -292,7 +292,7 @@ func (app *BootstrapApp) heartbeatRoutine() {
 			continue
 		}
 
-		res.Body.Close()
+		res.Body.Close() //nolint:errcheck
 
 		if res.StatusCode != 200 && res.StatusCode != 201 {
 			tlog.App.Debug().Str("status", res.Status).Msg("Heartbeat returned non-200/201 status")

internal/bootstrap/service_bootstrap.go

@@ -36,7 +36,7 @@ func (app *BootstrapApp) initServices(queries *repository.Queries) (Services, er
 
 	if err != nil {
 		tlog.App.Warn().Err(err).Msg("Failed to setup LDAP service, starting without it")
-		ldapService.Unconfigure()
+		ldapService.Unconfigure() //nolint:errcheck
 	}
 
 	services.ldapService = ldapService

internal/controller/oauth_controller.go

@@ -166,6 +166,12 @@ func (controller *OAuthController) oauthCallbackHandler(c *gin.Context) {
 
 	user, err := controller.auth.GetOAuthUserinfo(sessionIdCookie)
 
+	if err != nil {
+		tlog.App.Error().Err(err).Msg("Failed to get user info from OAuth provider")
+		c.Redirect(http.StatusTemporaryRedirect, fmt.Sprintf("%s/error", controller.config.AppURL))
+		return
+	}
+
 	if user.Email == "" {
 		tlog.App.Error().Msg("OAuth provider did not return an email")
 		c.Redirect(http.StatusTemporaryRedirect, fmt.Sprintf("%s/error", controller.config.AppURL))

internal/controller/user_controller_test.go

@@ -179,7 +179,7 @@ func TestUserController(t *testing.T) {
 		{
 			description: "Should rate limit on 3 invalid attempts",
 			middlewares: []gin.HandlerFunc{},
-			run: func(t *testing.T, router *gin.Engine, recorder *httptest.ResponseRecorder) {
+			run: func(t *testing.T, router *gin.Engine, recorder *httptest.ResponseRecorder) { //nolint:staticcheck
 				loginReq := controller.LoginRequest{
 					Username: "testuser",
 					Password: "wrongpassword",
@@ -201,7 +201,7 @@ func TestUserController(t *testing.T) {
 				}
 
 				// 4th attempt should be rate limited
-				recorder = httptest.NewRecorder()
+				recorder = httptest.NewRecorder() //nolint:staticcheck
 				req := httptest.NewRequest("POST", "/api/user/login", strings.NewReader(string(loginReqBody)))
 				req.Header.Set("Content-Type", "application/json")
 
@@ -293,7 +293,7 @@ func TestUserController(t *testing.T) {
 			middlewares: []gin.HandlerFunc{
 				totpCtx,
 			},
-			run: func(t *testing.T, router *gin.Engine, recorder *httptest.ResponseRecorder) {
+			run: func(t *testing.T, router *gin.Engine, recorder *httptest.ResponseRecorder) { //nolint:staticcheck
 				_, err := queries.CreateSession(context.TODO(), repository.CreateSessionParams{
 					UUID:        "test-totp-login-uuid",
 					Username:    "test",
@@ -316,7 +316,7 @@ func TestUserController(t *testing.T) {
 				totpReqBody, err := json.Marshal(totpReq)
 				assert.NoError(t, err)
 
-				recorder = httptest.NewRecorder()
+				recorder = httptest.NewRecorder() //nolint:staticcheck
 				req := httptest.NewRequest("POST", "/api/user/totp", strings.NewReader(string(totpReqBody)))
 				req.Header.Set("Content-Type", "application/json")
 				req.AddCookie(&http.Cookie{
@@ -345,7 +345,7 @@ func TestUserController(t *testing.T) {
 			middlewares: []gin.HandlerFunc{
 				totpCtx,
 			},
-			run: func(t *testing.T, router *gin.Engine, recorder *httptest.ResponseRecorder) {
+			run: func(t *testing.T, router *gin.Engine, recorder *httptest.ResponseRecorder) { //nolint:staticcheck
 				for range 3 {
 					totpReq := controller.TotpRequest{
 						Code: "000000", // invalid code
@@ -354,7 +354,7 @@ func TestUserController(t *testing.T) {
 					totpReqBody, err := json.Marshal(totpReq)
 					assert.NoError(t, err)
 
-					recorder = httptest.NewRecorder()
+					recorder = httptest.NewRecorder() //nolint:staticcheck
 					req := httptest.NewRequest("POST", "/api/user/totp", strings.NewReader(string(totpReqBody)))
 					req.Header.Set("Content-Type", "application/json")
 

internal/middleware/context_middleware.go

@@ -171,7 +171,7 @@ func (m *ContextMiddleware) cookieAuth(ctx context.Context, uuid string) (*model
 		}
 
 		if !m.auth.IsEmailWhitelisted(userContext.OAuth.Email) {
-			m.auth.DeleteSession(ctx, uuid)
+			m.auth.DeleteSession(ctx, uuid) //nolint:errcheck
 			return nil, nil, fmt.Errorf("email from session cookie not whitelisted: %s", userContext.OAuth.Email)
 		}
 	}

internal/service/auth_service.go

@@ -845,10 +845,3 @@ func (auth *AuthService) ClearRateLimitsTestingOnly() {
 	}
 	auth.loginMutex.Unlock()
 }
-
-func (auth *AuthService) getCookieDomain() string {
-	if auth.config.SubdomainsEnabled {
-		return "." + auth.config.CookieDomain
-	}
-	return auth.config.CookieDomain
-}

internal/service/ldap_service.go

@@ -269,7 +269,7 @@ func (ldap *LdapService) reconnect() error {
 	exp.Reset()
 
 	operation := func() (*ldapgo.Conn, error) {
-		ldap.conn.Close()
+		ldap.conn.Close() //nolint:errcheck
 		conn, err := ldap.connect()
 		if err != nil {
 			return nil, err

internal/service/oauth_extractors.go

@@ -92,7 +92,7 @@ func simpleReq[T any](client *http.Client, url string, headers map[string]string
 	if err != nil {
 		return nil, err
 	}
-	defer res.Body.Close()
+	defer res.Body.Close() //nolint:errcheck
 
 	if res.StatusCode < 200 || res.StatusCode >= 300 {
 		return nil, fmt.Errorf("request failed with status: %s", res.Status)

internal/utils/fs_utils_test.go

@@ -18,7 +18,7 @@ func TestReadFile(t *testing.T) {
 
 	err = file.Close()
 	require.NoError(t, err)
-	defer os.Remove("/tmp/tinyauth_test_file")
+	defer os.Remove("/tmp/tinyauth_test_file") //nolint:errcheck
 
 	// Normal case
 	content, err := ReadFile("/tmp/tinyauth_test_file")

internal/utils/security_utils.go

@@ -53,7 +53,7 @@ func FilterIP(filter string, ip string) (bool, error) {
 		return false, errors.New("invalid IP address")
 	}
 
-	filter = strings.Replace(filter, "-", "/", -1)
+	filter = strings.ReplaceAll(filter, "-", "/")
 
 	if strings.Contains(filter, "/") {
 		_, cidr, err := net.ParseCIDR(filter)

internal/utils/security_utils_test.go

@@ -19,7 +19,7 @@ func TestGetSecret(t *testing.T) {
 
 	err = file.Close()
 	require.NoError(t, err)
-	defer os.Remove("/tmp/tinyauth_test_secret")
+	defer os.Remove("/tmp/tinyauth_test_secret") //nolint:errcheck
 
 	// Get from config
 	assert.Equal(t, "mysecret", utils.GetSecret("mysecret", ""))

internal/utils/string_utils_test.go

@@ -73,7 +73,7 @@ func TestGetStringList(t *testing.T) {
 
 	err = file.Close()
 	assert.NoError(t, err)
-	defer os.Remove("/tmp/tinyauth_list_test_file")
+	defer os.Remove("/tmp/tinyauth_list_test_file") //nolint:errcheck
 
 	values, err := utils.GetStringList([]string{" first@example.com ", "", "second@example.com"}, "/tmp/tinyauth_list_test_file")
 	assert.NoError(t, err)

internal/utils/user_utils_test.go

@@ -24,7 +24,7 @@ func TestGetUsers(t *testing.T) {
 
 	err = file.Close()
 	require.NoError(t, err)
-	defer os.Remove(tmpDir + "/tinyauth_users_test.txt")
+	defer os.Remove(tmpDir + "/tinyauth_users_test.txt") //nolint:errcheck
 
 	noAttrs := map[string]model.UserAttributes{}