ci(golangci-lint): update configuration and fix lint issues (#4247)

* ci: update golangci-lint configuration and lint settings

- Update golangci-lint to version 2
- Enable new linters and adjust existing ones
- Update lint settings across multiple test files
- Remove unused struct and variable checks
- Add new lint exclusions for generated code and specific directories

Signed-off-by: Flc <four_leaf_clover@foxmail.com>

* ci(github): update golangci-lint-action to v8 and lint version to v2.3.4

Signed-off-by: Flc <four_leaf_clover@foxmail.com>

* ci: downgrade golangci-lint to v2.1.6

Signed-off-by: Flc <four_leaf_clover@foxmail.com>

* ci(golangci): add gofumpt linter and fix related issues- Added gofumpt linter to .golangci.yml

Signed-off-by: Flc <four_leaf_clover@foxmail.com>

* test: ignore testifylint and gofumpt lints in specific test cases

Signed-off-by: Flc <four_leaf_clover@foxmail.com>

* build(deps): remove golang.org/x/lint

- Remove golang.org/x/lint package from go.mod
- Update related dependencies in go.sum

Signed-off-by: flc1125 <four_leaf_clover@foxmail.com>

* build(deps): downgrade golang.org/x/mod and golang.org/x/tools

- Downgrade golang.org/x/mod from v0.24.0 to v0.18.0
- Downgrade golang.org/x/tools from v0.33.0 to v.22.0

These changes are made to address compatibility issues with the current project setup.

Signed-off-by: flc1125 <four_leaf_clover@foxmail.com>

---------

Signed-off-by: Flc <four_leaf_clover@foxmail.com>
Signed-off-by: flc1125 <four_leaf_clover@foxmail.com>

.github/workflows/gin.yml

@@ -24,9 +24,9 @@ jobs:
         with:
           go-version: "^1"
       - name: Setup golangci-lint
-        uses: golangci/golangci-lint-action@v6
+        uses: golangci/golangci-lint-action@v8
         with:
-          version: v1.61.0
+          version: v2.1.6
           args: --verbose
   test:
     needs: lint

.golangci.yml

@@ -1,16 +1,11 @@
-run:
+version: "2"
-  timeout: 5m
 linters:
   enable:
     - asciicheck
+    - copyloopvar
     - dogsled
     - durationcheck
-    - errcheck
     - errorlint
-    - copyloopvar
-    - gci
-    - gofmt
-    - goimports
     - gosec
     - misspell
     - nakedret
@@ -21,12 +16,8 @@ linters:
     - testifylint
     - usestdlibvars
     - wastedassign
-
+  settings:
-linters-settings:
     gosec:
-    # To select a subset of rules to run.
-    # Available rules: https://github.com/securego/gosec#available-rules
-    # Default: [] - means include all rules
       includes:
         - G102
         - G106
@@ -37,35 +28,54 @@ linters-settings:
         - G201
         - G203
     perfsprint:
+      int-conversion: true
       err-error: true
       errorf: true
-    int-conversion: true
       sprintf1: true
       strconcat: true
     testifylint:
       enable-all: true
-
+  exclusions:
-issues:
+    generated: lax
-  exclude-rules:
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    rules:
       - linters:
           - structcheck
           - unused
-      text: "`data` is unused"
+        text: '`data` is unused'
       - linters:
           - staticcheck
-      text: "SA1019:"
+        text: 'SA1019:'
       - linters:
           - revive
-      text: "var-naming:"
+        text: 'var-naming:'
       - linters:
           - revive
-      text: "exported:"
+        text: 'exported:'
-    - path: _test\.go
+      - linters:
-      linters:
+          - gosec
-        - gosec # security is not make sense in tests
+        path: _test\.go
       - linters:
           - revive
         path: _test\.go
-    - path: gin.go
+    paths:
-      linters:
+      - third_party$
+      - builtin$
+      - examples$
+formatters:
+  enable:
     - gci
+    - gofmt
+    - gofumpt
+    - goimports
+  exclusions:
+    generated: lax
+    paths:
+      - third_party$
+      - builtin$
+      - examples$
+      - gin.go

binding/binding_test.go

@@ -51,8 +51,6 @@ type FooBarFileStruct struct {
 type FooBarFileFailStruct struct {
 	FooBarStruct
 	File *multipart.FileHeader `invalid_name:"file" binding:"required"`
-	// for unexport test
-	data *multipart.FileHeader `form:"data" binding:"required"`
 }
 
 type FooDefaultBarStruct struct {
@@ -1063,7 +1061,7 @@ func testFormBindingInvalidName(t *testing.T, method, path, badPath, body, badBo
 	}
 	err := b.Bind(req, &obj)
 	require.NoError(t, err)
-	assert.Equal(t, "", obj.TestName)
+	assert.Empty(t, obj.TestName)
 
 	obj = InvalidNameType{}
 	req = requestWithBody(method, badPath, badBody)
@@ -1318,7 +1316,7 @@ func testBodyBindingFail(t *testing.T, b Binding, name, path, badPath, body, bad
 	req := requestWithBody(http.MethodPost, path, body)
 	err := b.Bind(req, &obj)
 	require.Error(t, err)
-	assert.Equal(t, "", obj.Foo)
+	assert.Empty(t, obj.Foo)
 
 	obj = FooStruct{}
 	req = requestWithBody(http.MethodPost, badPath, badBody)

binding/default_validator_test.go

@@ -18,14 +18,16 @@ func TestSliceValidationError(t *testing.T) {
 		{"has nil elements", SliceValidationError{errors.New("test error"), nil}, "[0]: test error"},
 		{"has zero elements", SliceValidationError{}, ""},
 		{"has one element", SliceValidationError{errors.New("test one error")}, "[0]: test one error"},
-		{"has two elements",
+		{
+			"has two elements",
 			SliceValidationError{
 				errors.New("first error"),
 				errors.New("second error"),
 			},
 			"[0]: first error\n[1]: second error",
 		},
-		{"has many elements",
+		{
+			"has many elements",
 			SliceValidationError{
 				errors.New("first error"),
 				errors.New("second error"),

binding/form.go

@@ -11,9 +11,11 @@ import (
 
 const defaultMemory = 32 << 20
 
-type formBinding struct{}
+type (
-type formPostBinding struct{}
+	formBinding          struct{}
-type formMultipartBinding struct{}
+	formPostBinding      struct{}
+	formMultipartBinding struct{}
+)
 
 func (formBinding) Name() string {
 	return "form"

binding/form_mapping_test.go

@@ -509,9 +509,9 @@ func TestMappingCustomStructTypeWithFormTag(t *testing.T) {
 	err := mappingByPtr(&s, formSource{"data": {`file:/foo:happiness`}}, "form")
 	require.NoError(t, err)
 
-	assert.EqualValues(t, "file", s.FileData.Protocol)
+	assert.Equal(t, "file", s.FileData.Protocol)
-	assert.EqualValues(t, "/foo", s.FileData.Path)
+	assert.Equal(t, "/foo", s.FileData.Path)
-	assert.EqualValues(t, "happiness", s.FileData.Name)
+	assert.Equal(t, "happiness", s.FileData.Name)
 }
 
 func TestMappingCustomStructTypeWithURITag(t *testing.T) {
@@ -521,9 +521,9 @@ func TestMappingCustomStructTypeWithURITag(t *testing.T) {
 	err := mappingByPtr(&s, formSource{"data": {`file:/foo:happiness`}}, "uri")
 	require.NoError(t, err)
 
-	assert.EqualValues(t, "file", s.FileData.Protocol)
+	assert.Equal(t, "file", s.FileData.Protocol)
-	assert.EqualValues(t, "/foo", s.FileData.Path)
+	assert.Equal(t, "/foo", s.FileData.Path)
-	assert.EqualValues(t, "happiness", s.FileData.Name)
+	assert.Equal(t, "happiness", s.FileData.Name)
 }
 
 func TestMappingCustomPointerStructTypeWithFormTag(t *testing.T) {
@@ -533,9 +533,9 @@ func TestMappingCustomPointerStructTypeWithFormTag(t *testing.T) {
 	err := mappingByPtr(&s, formSource{"data": {`file:/foo:happiness`}}, "form")
 	require.NoError(t, err)
 
-	assert.EqualValues(t, "file", s.FileData.Protocol)
+	assert.Equal(t, "file", s.FileData.Protocol)
-	assert.EqualValues(t, "/foo", s.FileData.Path)
+	assert.Equal(t, "/foo", s.FileData.Path)
-	assert.EqualValues(t, "happiness", s.FileData.Name)
+	assert.Equal(t, "happiness", s.FileData.Name)
 }
 
 func TestMappingCustomPointerStructTypeWithURITag(t *testing.T) {
@@ -545,9 +545,9 @@ func TestMappingCustomPointerStructTypeWithURITag(t *testing.T) {
 	err := mappingByPtr(&s, formSource{"data": {`file:/foo:happiness`}}, "uri")
 	require.NoError(t, err)
 
-	assert.EqualValues(t, "file", s.FileData.Protocol)
+	assert.Equal(t, "file", s.FileData.Protocol)
-	assert.EqualValues(t, "/foo", s.FileData.Path)
+	assert.Equal(t, "/foo", s.FileData.Path)
-	assert.EqualValues(t, "happiness", s.FileData.Name)
+	assert.Equal(t, "happiness", s.FileData.Name)
 }
 
 type customPath []string
@@ -570,8 +570,8 @@ func TestMappingCustomSliceUri(t *testing.T) {
 	err := mappingByPtr(&s, formSource{"path": {`bar/foo`}}, "uri")
 	require.NoError(t, err)
 
-	assert.EqualValues(t, "bar", s.FileData[0])
+	assert.Equal(t, "bar", s.FileData[0])
-	assert.EqualValues(t, "foo", s.FileData[1])
+	assert.Equal(t, "foo", s.FileData[1])
 }
 
 func TestMappingCustomSliceForm(t *testing.T) {
@@ -581,8 +581,8 @@ func TestMappingCustomSliceForm(t *testing.T) {
 	err := mappingByPtr(&s, formSource{"path": {`bar/foo`}}, "form")
 	require.NoError(t, err)
 
-	assert.EqualValues(t, "bar", s.FileData[0])
+	assert.Equal(t, "bar", s.FileData[0])
-	assert.EqualValues(t, "foo", s.FileData[1])
+	assert.Equal(t, "foo", s.FileData[1])
 }
 
 type objectID [12]byte
@@ -621,7 +621,7 @@ func TestMappingCustomArrayUri(t *testing.T) {
 	require.NoError(t, err)
 
 	expected, _ := convertTo(val)
-	assert.EqualValues(t, expected, s.FileData)
+	assert.Equal(t, expected, s.FileData)
 }
 
 func TestMappingCustomArrayForm(t *testing.T) {
@@ -633,5 +633,5 @@ func TestMappingCustomArrayForm(t *testing.T) {
 	require.NoError(t, err)
 
 	expected, _ := convertTo(val)
-	assert.EqualValues(t, expected, s.FileData)
+	assert.Equal(t, expected, s.FileData)
 }

binding/header.go

@@ -17,7 +17,6 @@ func (headerBinding) Name() string {
 }
 
 func (headerBinding) Bind(req *http.Request, obj any) error {
-
 	if err := mapHeader(obj, req.Header); err != nil {
 		return err
 	}

binding/validate_test.go

@@ -198,7 +198,7 @@ type structModifyValidation struct {
 }
 
 func toZero(sl validator.StructLevel) {
-	var s *structModifyValidation = sl.Top().Interface().(*structModifyValidation)
+	s := sl.Top().Interface().(*structModifyValidation)
 	s.Integer = 0
 }
 
@@ -249,5 +249,5 @@ func TestValidatorEngine(t *testing.T) {
 	// Check that we got back non-nil errs
 	require.Error(t, errs)
 	// Check that the error matches expectation
-	require.Error(t, errs, "", "", "notone")
+	require.Error(t, errs, "notone")
 }

binding/xml.go

@@ -24,6 +24,7 @@ func (xmlBinding) Bind(req *http.Request, obj any) error {
 func (xmlBinding) BindBody(body []byte, obj any) error {
 	return decodeXML(bytes.NewReader(body), obj)
 }
+
 func decodeXML(r io.Reader, obj any) error {
 	decoder := xml.NewDecoder(r)
 	if err := decoder.Decode(obj); err != nil {

context_test.go

@@ -918,7 +918,7 @@ func TestContextRenderJSON(t *testing.T) {
 	c.JSON(http.StatusCreated, H{"foo": "bar", "html": "<b>"})
 
 	assert.Equal(t, http.StatusCreated, w.Code)
-	assert.Equal(t, "{\"foo\":\"bar\",\"html\":\"\\u003cb\\u003e\"}", w.Body.String())
+	assert.JSONEq(t, "{\"foo\":\"bar\",\"html\":\"\\u003cb\\u003e\"}", w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.Header().Get("Content-Type"))
 }
 
@@ -946,7 +946,7 @@ func TestContextRenderJSONPWithoutCallback(t *testing.T) {
 	c.JSONP(http.StatusCreated, H{"foo": "bar"})
 
 	assert.Equal(t, http.StatusCreated, w.Code)
-	assert.Equal(t, "{\"foo\":\"bar\"}", w.Body.String())
+	assert.JSONEq(t, "{\"foo\":\"bar\"}", w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.Header().Get("Content-Type"))
 }
 
@@ -972,7 +972,7 @@ func TestContextRenderAPIJSON(t *testing.T) {
 	c.JSON(http.StatusCreated, H{"foo": "bar"})
 
 	assert.Equal(t, http.StatusCreated, w.Code)
-	assert.Equal(t, "{\"foo\":\"bar\"}", w.Body.String())
+	assert.JSONEq(t, "{\"foo\":\"bar\"}", w.Body.String())
 	assert.Equal(t, "application/vnd.api+json", w.Header().Get("Content-Type"))
 }
 
@@ -998,7 +998,7 @@ func TestContextRenderIndentedJSON(t *testing.T) {
 	c.IndentedJSON(http.StatusCreated, H{"foo": "bar", "bar": "foo", "nested": H{"foo": "bar"}})
 
 	assert.Equal(t, http.StatusCreated, w.Code)
-	assert.Equal(t, "{\n    \"bar\": \"foo\",\n    \"foo\": \"bar\",\n    \"nested\": {\n        \"foo\": \"bar\"\n    }\n}", w.Body.String())
+	assert.JSONEq(t, "{\n    \"bar\": \"foo\",\n    \"foo\": \"bar\",\n    \"nested\": {\n        \"foo\": \"bar\"\n    }\n}", w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.Header().Get("Content-Type"))
 }
 
@@ -1059,7 +1059,7 @@ func TestContextRenderPureJSON(t *testing.T) {
 	c, _ := CreateTestContext(w)
 	c.PureJSON(http.StatusCreated, H{"foo": "bar", "html": "<b>"})
 	assert.Equal(t, http.StatusCreated, w.Code)
-	assert.Equal(t, "{\"foo\":\"bar\",\"html\":\"<b>\"}\n", w.Body.String())
+	assert.JSONEq(t, "{\"foo\":\"bar\",\"html\":\"<b>\"}\n", w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.Header().Get("Content-Type"))
 }
 
@@ -1233,7 +1233,7 @@ func TestContextRenderSSE(t *testing.T) {
 		"bar": "foo",
 	})
 
-	assert.Equal(t, strings.Replace(w.Body.String(), " ", "", -1), strings.Replace("event:float\ndata:1.5\n\nid:123\ndata:text\n\nevent:chat\ndata:{\"bar\":\"foo\",\"foo\":\"bar\"}\n\n", " ", "", -1))
+	assert.Equal(t, strings.ReplaceAll(w.Body.String(), " ", ""), strings.ReplaceAll("event:float\ndata:1.5\n\nid:123\ndata:text\n\nevent:chat\ndata:{\"bar\":\"foo\",\"foo\":\"bar\"}\n\n", " ", ""))
 }
 
 func TestContextRenderFile(t *testing.T) {
@@ -1247,7 +1247,7 @@ func TestContextRenderFile(t *testing.T) {
 	assert.Contains(t, w.Body.String(), "func New(opts ...OptionFunc) *Engine {")
 	// Content-Type='text/plain; charset=utf-8' when go version <= 1.16,
 	// else, Content-Type='text/x-go; charset=utf-8'
-	assert.NotEqual(t, "", w.Header().Get("Content-Type"))
+	assert.NotEmpty(t, w.Header().Get("Content-Type"))
 }
 
 func TestContextRenderFileFromFS(t *testing.T) {
@@ -1261,7 +1261,7 @@ func TestContextRenderFileFromFS(t *testing.T) {
 	assert.Contains(t, w.Body.String(), "func New(opts ...OptionFunc) *Engine {")
 	// Content-Type='text/plain; charset=utf-8' when go version <= 1.16,
 	// else, Content-Type='text/x-go; charset=utf-8'
-	assert.NotEqual(t, "", w.Header().Get("Content-Type"))
+	assert.NotEmpty(t, w.Header().Get("Content-Type"))
 	assert.Equal(t, "/some/path", c.Request.URL.Path)
 }
 
@@ -1432,7 +1432,7 @@ func TestContextNegotiationWithJSON(t *testing.T) {
 	})
 
 	assert.Equal(t, http.StatusOK, w.Code)
-	assert.Equal(t, "{\"foo\":\"bar\"}", w.Body.String())
+	assert.JSONEq(t, "{\"foo\":\"bar\"}", w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.Header().Get("Content-Type"))
 }
 
@@ -1518,7 +1518,7 @@ func TestContextNegotiationFormat(t *testing.T) {
 	c.Request, _ = http.NewRequest(http.MethodPost, "", nil)
 
 	assert.Panics(t, func() { c.NegotiateFormat() })
-	assert.Equal(t, MIMEJSON, c.NegotiateFormat(MIMEJSON, MIMEXML))
+	assert.Equal(t, MIMEJSON, c.NegotiateFormat(MIMEJSON, MIMEXML)) //nolint:testifylint
 	assert.Equal(t, MIMEHTML, c.NegotiateFormat(MIMEHTML, MIMEJSON))
 }
 
@@ -1540,7 +1540,7 @@ func TestContextNegotiationFormatWithWildcardAccept(t *testing.T) {
 	assert.Equal(t, "*/*", c.NegotiateFormat("*/*"))
 	assert.Equal(t, "text/*", c.NegotiateFormat("text/*"))
 	assert.Equal(t, "application/*", c.NegotiateFormat("application/*"))
-	assert.Equal(t, MIMEJSON, c.NegotiateFormat(MIMEJSON))
+	assert.Equal(t, MIMEJSON, c.NegotiateFormat(MIMEJSON)) //nolint:testifylint
 	assert.Equal(t, MIMEXML, c.NegotiateFormat(MIMEXML))
 	assert.Equal(t, MIMEHTML, c.NegotiateFormat(MIMEHTML))
 
@@ -1550,9 +1550,9 @@ func TestContextNegotiationFormatWithWildcardAccept(t *testing.T) {
 
 	assert.Equal(t, "*/*", c.NegotiateFormat("*/*"))
 	assert.Equal(t, "text/*", c.NegotiateFormat("text/*"))
-	assert.Equal(t, "", c.NegotiateFormat("application/*"))
+	assert.Empty(t, c.NegotiateFormat("application/*"))
-	assert.Equal(t, "", c.NegotiateFormat(MIMEJSON))
+	assert.Empty(t, c.NegotiateFormat(MIMEJSON))
-	assert.Equal(t, "", c.NegotiateFormat(MIMEXML))
+	assert.Empty(t, c.NegotiateFormat(MIMEXML))
 	assert.Equal(t, MIMEHTML, c.NegotiateFormat(MIMEHTML))
 }
 
@@ -1564,9 +1564,9 @@ func TestContextNegotiationFormatCustom(t *testing.T) {
 	c.Accepted = nil
 	c.SetAccepted(MIMEJSON, MIMEXML)
 
-	assert.Equal(t, MIMEJSON, c.NegotiateFormat(MIMEJSON, MIMEXML))
+	assert.Equal(t, MIMEJSON, c.NegotiateFormat(MIMEJSON, MIMEXML)) //nolint:testifylint
 	assert.Equal(t, MIMEXML, c.NegotiateFormat(MIMEXML, MIMEHTML))
-	assert.Equal(t, MIMEJSON, c.NegotiateFormat(MIMEJSON))
+	assert.Equal(t, MIMEJSON, c.NegotiateFormat(MIMEJSON)) //nolint:testifylint
 }
 
 func TestContextNegotiationFormat2(t *testing.T) {
@@ -1574,7 +1574,7 @@ func TestContextNegotiationFormat2(t *testing.T) {
 	c.Request, _ = http.NewRequest(http.MethodPost, "/", nil)
 	c.Request.Header.Add("Accept", "image/tiff-fx")
 
-	assert.Equal(t, "", c.NegotiateFormat("image/tiff"))
+	assert.Empty(t, c.NegotiateFormat("image/tiff"))
 }
 
 func TestContextIsAborted(t *testing.T) {
@@ -1634,7 +1634,7 @@ func TestContextAbortWithStatusJSON(t *testing.T) {
 	_, err := buf.ReadFrom(w.Body)
 	require.NoError(t, err)
 	jsonStringBody := buf.String()
-	assert.Equal(t, "{\"foo\":\"fooValue\",\"bar\":\"barValue\"}", jsonStringBody)
+	assert.JSONEq(t, "{\"foo\":\"fooValue\",\"bar\":\"barValue\"}", jsonStringBody)
 }
 
 func TestContextError(t *testing.T) {
@@ -3076,7 +3076,7 @@ func TestInterceptedHeader(t *testing.T) {
 	// Compared to this time, this is when the response headers will be flushed
 	// As response is flushed on c.String, the Header cannot be set by the first
 	// middleware. Assert this
-	assert.Equal(t, "", w.Result().Header.Get("X-Test"))
+	assert.Empty(t, w.Result().Header.Get("X-Test"))
 	assert.Equal(t, "present", w.Result().Header.Get("X-Test-2"))
 }
 

errors_test.go

@@ -34,7 +34,7 @@ func TestError(t *testing.T) {
 	}, err.JSON())
 
 	jsonBytes, _ := json.Marshal(err)
-	assert.Equal(t, "{\"error\":\"test error\",\"meta\":\"some data\"}", string(jsonBytes))
+	assert.JSONEq(t, "{\"error\":\"test error\",\"meta\":\"some data\"}", string(jsonBytes))
 
 	err.SetMeta(H{ //nolint: errcheck
 		"status": "200",
@@ -93,13 +93,13 @@ Error #03: third
 		H{"error": "third", "status": "400"},
 	}, errs.JSON())
 	jsonBytes, _ := json.Marshal(errs)
-	assert.Equal(t, "[{\"error\":\"first\"},{\"error\":\"second\",\"meta\":\"some data\"},{\"error\":\"third\",\"status\":\"400\"}]", string(jsonBytes))
+	assert.JSONEq(t, "[{\"error\":\"first\"},{\"error\":\"second\",\"meta\":\"some data\"},{\"error\":\"third\",\"status\":\"400\"}]", string(jsonBytes))
 	errs = errorMsgs{
 		{Err: errors.New("first"), Type: ErrorTypePrivate},
 	}
 	assert.Equal(t, H{"error": "first"}, errs.JSON())
 	jsonBytes, _ = json.Marshal(errs)
-	assert.Equal(t, "{\"error\":\"first\"}", string(jsonBytes))
+	assert.JSONEq(t, "{\"error\":\"first\"}", string(jsonBytes))
 
 	errs = errorMsgs{}
 	assert.Nil(t, errs.Last())

fs.go

@@ -17,7 +17,6 @@ type OnlyFilesFS struct {
 // Open passes `Open` to the upstream implementation without `Readdir` functionality.
 func (o OnlyFilesFS) Open(name string) (http.File, error) {
 	f, err := o.FileSystem.Open(name)
-
 	if err != nil {
 		return nil, err
 	}

gin.go

@@ -18,7 +18,6 @@ import (
 	"github.com/gin-gonic/gin/internal/bytesconv"
 	filesystem "github.com/gin-gonic/gin/internal/fs"
 	"github.com/gin-gonic/gin/render"
-
 	"github.com/quic-go/quic-go/http3"
 	"golang.org/x/net/http2"
 	"golang.org/x/net/http2/h2c"
@@ -216,7 +215,7 @@ func New(opts ...OptionFunc) *Engine {
 		trustedProxies:         []string{"0.0.0.0/0", "::/0"},
 		trustedCIDRs:           defaultTrustedCIDRs,
 	}
-	engine.RouterGroup.engine = engine
+	engine.engine = engine
 	engine.pool.New = func() any {
 		return engine.allocateContext(engine.maxParams)
 	}

ginS/gins.go

@@ -12,8 +12,10 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
-var once sync.Once
+var (
-var internalEngine *gin.Engine
+	once           sync.Once
+	internalEngine *gin.Engine
+)
 
 func engine() *gin.Engine {
 	once.Do(func() {

gin_integration_test.go

@@ -28,7 +28,6 @@ import (
 // params[1]=response status (custom compare status) default:"200 OK"
 // params[2]=response body (custom compare content)  default:"it worked"
 func testRequest(t *testing.T, params ...string) {
-
 	if len(params) == 0 {
 		t.Fatal("url cannot be empty")
 	}
@@ -47,12 +46,12 @@ func testRequest(t *testing.T, params ...string) {
 	body, ioerr := io.ReadAll(resp.Body)
 	require.NoError(t, ioerr)
 
-	var responseStatus = "200 OK"
+	responseStatus := "200 OK"
 	if len(params) > 1 && params[1] != "" {
 		responseStatus = params[1]
 	}
 
-	var responseBody = "it worked"
+	responseBody := "it worked"
 	if len(params) > 2 && params[2] != "" {
 		responseBody = params[2]
 	}
@@ -170,7 +169,7 @@ func TestRunTLS(t *testing.T) {
 }
 
 func TestPusher(t *testing.T) {
-	var html = template.Must(template.New("https").Parse(`
+	html := template.Must(template.New("https").Parse(`
 <html>
 <head>
   <title>Https Test</title>

gin_test.go

@@ -46,7 +46,7 @@ func setupHTMLFiles(t *testing.T, mode string, tls bool, loadMethod func(*Engine
 		})
 		router.GET("/raw", func(c *Context) {
 			c.HTML(http.StatusOK, "raw.tmpl", map[string]any{
-				"now": time.Date(2017, 07, 01, 0, 0, 0, 0, time.UTC),
+				"now": time.Date(2017, 07, 01, 0, 0, 0, 0, time.UTC), //nolint:gofumpt
 			})
 		})
 	})
@@ -883,7 +883,7 @@ func TestWithOptionFunc(t *testing.T) {
 type Birthday string
 
 func (b *Birthday) UnmarshalParam(param string) error {
-	*b = Birthday(strings.Replace(param, "-", "/", -1))
+	*b = Birthday(strings.ReplaceAll(param, "-", "/"))
 	return nil
 }
 

githubapi_test.go

@@ -298,8 +298,8 @@ func TestShouldBindUri(t *testing.T) {
 	router.Handle(http.MethodGet, "/rest/:name/:id", func(c *Context) {
 		var person Person
 		require.NoError(t, c.ShouldBindUri(&person))
-		assert.NotEqual(t, "", person.Name)
+		assert.NotEmpty(t, person.Name)
-		assert.NotEqual(t, "", person.ID)
+		assert.NotEmpty(t, person.ID)
 		c.String(http.StatusOK, "ShouldBindUri test OK")
 	})
 
@@ -320,8 +320,8 @@ func TestBindUri(t *testing.T) {
 	router.Handle(http.MethodGet, "/rest/:name/:id", func(c *Context) {
 		var person Person
 		require.NoError(t, c.BindUri(&person))
-		assert.NotEqual(t, "", person.Name)
+		assert.NotEmpty(t, person.Name)
-		assert.NotEqual(t, "", person.ID)
+		assert.NotEmpty(t, person.ID)
 		c.String(http.StatusOK, "BindUri test OK")
 	})
 

internal/bytesconv/bytesconv_test.go

@@ -12,8 +12,10 @@ import (
 	"time"
 )
 
-var testString = "Albert Einstein: Logic will get you from A to B. Imagination will take you everywhere."
+var (
-var testBytes = []byte(testString)
+	testString = "Albert Einstein: Logic will get you from A to B. Imagination will take you everywhere."
+	testBytes  = []byte(testString)
+)
 
 func rawBytesToStr(b []byte) string {
 	return string(b)

internal/fs/fs.go

@@ -13,7 +13,6 @@ type FileSystem struct {
 // Open passes `Open` to the upstream implementation and return an [fs.File].
 func (o FileSystem) Open(name string) (fs.File, error) {
 	f, err := o.FileSystem.Open(name)
-
 	if err != nil {
 		return nil, err
 	}

logger_test.go

@@ -371,11 +371,11 @@ func TestErrorLogger(t *testing.T) {
 
 	w := PerformRequest(router, http.MethodGet, "/error")
 	assert.Equal(t, http.StatusOK, w.Code)
-	assert.Equal(t, "{\"error\":\"this is an error\"}", w.Body.String())
+	assert.JSONEq(t, "{\"error\":\"this is an error\"}", w.Body.String())
 
 	w = PerformRequest(router, http.MethodGet, "/abort")
 	assert.Equal(t, http.StatusUnauthorized, w.Code)
-	assert.Equal(t, "{\"error\":\"no authorized\"}", w.Body.String())
+	assert.JSONEq(t, "{\"error\":\"no authorized\"}", w.Body.String())
 
 	w = PerformRequest(router, http.MethodGet, "/print")
 	assert.Equal(t, http.StatusInternalServerError, w.Code)

middleware_test.go

@@ -249,5 +249,5 @@ func TestMiddlewareWrite(t *testing.T) {
 	w := PerformRequest(router, http.MethodGet, "/")
 
 	assert.Equal(t, http.StatusBadRequest, w.Code)
-	assert.Equal(t, strings.Replace("hola\n<map><foo>bar</foo></map>{\"foo\":\"bar\"}{\"foo\":\"bar\"}event:test\ndata:message\n\n", " ", "", -1), strings.Replace(w.Body.String(), " ", "", -1))
+	assert.Equal(t, strings.ReplaceAll("hola\n<map><foo>bar</foo></map>{\"foo\":\"bar\"}{\"foo\":\"bar\"}event:test\ndata:message\n\n", " ", ""), strings.ReplaceAll(w.Body.String(), " ", ""))
 }

mode.go

@@ -44,8 +44,10 @@ var DefaultWriter io.Writer = os.Stdout
 // DefaultErrorWriter is the default io.Writer used by Gin to debug errors
 var DefaultErrorWriter io.Writer = os.Stderr
 
-var ginMode int32 = debugCode
+var (
-var modeName atomic.Value
+	ginMode  int32 = debugCode
+	modeName atomic.Value
+)
 
 func init() {
 	mode := os.Getenv(EnvGinMode)

render/html.go

@@ -67,6 +67,7 @@ func (r HTMLDebug) Instance(name string, data any) Render {
 		Data:     data,
 	}
 }
+
 func (r HTMLDebug) loadTemplate() *template.Template {
 	if r.FuncMap == nil {
 		r.FuncMap = template.FuncMap{}

render/render_test.go

@@ -38,7 +38,7 @@ func TestRenderJSON(t *testing.T) {
 	err := (JSON{data}).Render(w)
 
 	require.NoError(t, err)
-	assert.Equal(t, "{\"foo\":\"bar\",\"html\":\"\\u003cb\\u003e\"}", w.Body.String())
+	assert.JSONEq(t, "{\"foo\":\"bar\",\"html\":\"\\u003cb\\u003e\"}", w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.Header().Get("Content-Type"))
 }
 
@@ -60,7 +60,7 @@ func TestRenderIndentedJSON(t *testing.T) {
 	err := (IndentedJSON{data}).Render(w)
 
 	require.NoError(t, err)
-	assert.Equal(t, "{\n    \"bar\": \"foo\",\n    \"foo\": \"bar\"\n}", w.Body.String())
+	assert.JSONEq(t, "{\n    \"bar\": \"foo\",\n    \"foo\": \"bar\"\n}", w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.Header().Get("Content-Type"))
 }
 
@@ -85,7 +85,7 @@ func TestRenderSecureJSON(t *testing.T) {
 	err1 := (SecureJSON{"while(1);", data}).Render(w1)
 
 	require.NoError(t, err1)
-	assert.Equal(t, "{\"foo\":\"bar\"}", w1.Body.String())
+	assert.JSONEq(t, "{\"foo\":\"bar\"}", w1.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w1.Header().Get("Content-Type"))
 
 	w2 := httptest.NewRecorder()
@@ -194,7 +194,7 @@ func TestRenderJsonpJSONError2(t *testing.T) {
 	e := (JsonpJSON{"", data}).Render(w)
 	require.NoError(t, e)
 
-	assert.Equal(t, "{\"foo\":\"bar\"}", w.Body.String())
+	assert.JSONEq(t, "{\"foo\":\"bar\"}", w.Body.String())
 	assert.Equal(t, "application/javascript; charset=utf-8", w.Header().Get("Content-Type"))
 }
 
@@ -217,7 +217,7 @@ func TestRenderAsciiJSON(t *testing.T) {
 	err := (AsciiJSON{data1}).Render(w1)
 
 	require.NoError(t, err)
-	assert.Equal(t, "{\"lang\":\"GO\\u8bed\\u8a00\",\"tag\":\"\\u003cbr\\u003e\"}", w1.Body.String())
+	assert.JSONEq(t, "{\"lang\":\"GO\\u8bed\\u8a00\",\"tag\":\"\\u003cbr\\u003e\"}", w1.Body.String())
 	assert.Equal(t, "application/json", w1.Header().Get("Content-Type"))
 
 	w2 := httptest.NewRecorder()
@@ -244,7 +244,7 @@ func TestRenderPureJSON(t *testing.T) {
 	}
 	err := (PureJSON{data}).Render(w)
 	require.NoError(t, err)
-	assert.Equal(t, "{\"foo\":\"bar\",\"html\":\"<b>\"}\n", w.Body.String())
+	assert.JSONEq(t, "{\"foo\":\"bar\",\"html\":\"<b>\"}\n", w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.Header().Get("Content-Type"))
 }
 

routes_test.go

@@ -484,7 +484,7 @@ func TestRouterMiddlewareAndStatic(t *testing.T) {
 	assert.Contains(t, w.Body.String(), "package gin")
 	// Content-Type='text/plain; charset=utf-8' when go version <= 1.16,
 	// else, Content-Type='text/x-go; charset=utf-8'
-	assert.NotEqual(t, "", w.Header().Get("Content-Type"))
+	assert.NotEmpty(t, w.Header().Get("Content-Type"))
 	assert.NotEqual(t, "Mon, 02 Jan 2006 15:04:05 MST", w.Header().Get("Last-Modified"))
 	assert.Equal(t, "Mon, 02 Jan 2006 15:04:05 MST", w.Header().Get("Expires"))
 	assert.Equal(t, "Gin Framework", w.Header().Get("x-GIN"))
@@ -764,7 +764,7 @@ func TestRouteContextHoldsFullPath(t *testing.T) {
 	// Test not found
 	router.Use(func(c *Context) {
 		// For not found routes full path is empty
-		assert.Equal(t, "", c.FullPath())
+		assert.Empty(t, c.FullPath())
 	})
 
 	w := PerformRequest(router, http.MethodGet, "/not-found")

tree_test.go

@@ -532,7 +532,7 @@ func TestTreeCatchAllConflictRoot(t *testing.T) {
 
 func TestTreeCatchMaxParams(t *testing.T) {
 	tree := &node{}
-	var route = "/cmd/*filepath"
+	route := "/cmd/*filepath"
 	tree.addRoute(route, fakeHandler(route))
 }
 
@@ -692,7 +692,7 @@ func TestTreeRootTrailingSlashRedirect(t *testing.T) {
 }
 
 func TestRedirectTrailingSlash(t *testing.T) {
-	var data = []struct {
+	data := []struct {
 		path string
 	}{
 		{"/hello/:name"},

utils_test.go

@@ -94,7 +94,7 @@ func somefunction() {
 }
 
 func TestJoinPaths(t *testing.T) {
-	assert.Equal(t, "", joinPaths("", ""))
+	assert.Empty(t, joinPaths("", ""))
 	assert.Equal(t, "/", joinPaths("", "/"))
 	assert.Equal(t, "/a", joinPaths("/a", ""))
 	assert.Equal(t, "/a/", joinPaths("/a/", ""))