rule.exported: add feature to disable checking on const,method,function, variable (#1047)

Co-authored-by: chavacava <salvadorcavadini+github@gmail.com>

RULES_DESCRIPTIONS.md

@@ -475,12 +475,17 @@ Available flags are:
 * _disableStutteringCheck_ disables checking for method names that stutter with the package name (i.e. avoid failure messages of the form _type name will be used as x.XY by other packages, and that stutters; consider calling this Y_)
 * _sayRepetitiveInsteadOfStutters_ replaces the use of the term _stutters_ by _repetitive_ in failure messages
 * _checkPublicInterface_ enabled checking public method definitions in public interface types
+* _disableChecksOnConstants_ disable all checks on constant declarations
+* _disableChecksOnFunctions_ disable all checks on function declarations
+* _disableChecksOnMethods_ disable all checks on method declarations
+* _disableChecksOnTypes_ disable all checks on type declarations
+* _disableChecksOnVariables_ disable all checks on variable declarations
 
 Example:
 
 ```toml
 [rule.exported]
-  arguments = ["checkPrivateReceivers", "disableStutteringCheck", "checkPublicInterface"]
+  arguments = ["checkPrivateReceivers", "disableStutteringCheck", "checkPublicInterface", "disableChecksOnFunctions"]
 ```
 
 ## file-header

rule/exported.go

@@ -13,40 +13,92 @@ import (
 	"github.com/mgechev/revive/lint"
 )
 
+// disabledChecks store ignored warnings types
+type disabledChecks struct {
+	Const            bool
+	Function         bool
+	Method           bool
+	PrivateReceivers bool
+	PublicInterfaces bool
+	Stuttering       bool
+	Type             bool
+	Var              bool
+}
+
+const checkNamePrivateReceivers = "privateReceivers"
+const checkNamePublicInterfaces = "publicInterfaces"
+const checkNameStuttering = "stuttering"
+
+// isDisabled returns true if the given check is disabled, false otherwise
+func (dc *disabledChecks) isDisabled(checkName string) bool {
+	switch checkName {
+	case "var":
+		return dc.Var
+	case "const":
+		return dc.Const
+	case "function":
+		return dc.Function
+	case "method":
+		return dc.Method
+	case checkNamePrivateReceivers:
+		return dc.PrivateReceivers
+	case checkNamePublicInterfaces:
+		return dc.PublicInterfaces
+	case checkNameStuttering:
+		return dc.Stuttering
+	case "type":
+		return dc.Type
+	default:
+		return false
+	}
+}
+
 // ExportedRule lints given else constructs.
 type ExportedRule struct {
-	configured             bool
-	checkPrivateReceivers  bool
-	disableStutteringCheck bool
-	checkPublicInterface   bool
-	stuttersMsg            string
+	configured     bool
+	stuttersMsg    string
+	disabledChecks disabledChecks
 	sync.Mutex
 }
 
 func (r *ExportedRule) configure(arguments lint.Arguments) {
 	r.Lock()
 	defer r.Unlock()
-	if !r.configured {
-		r.stuttersMsg = "stutters"
-		for _, flag := range arguments {
-			flagStr, ok := flag.(string)
-			if !ok {
-				panic(fmt.Sprintf("Invalid argument for the %s rule: expecting a string, got %T", r.Name(), flag))
-			}
-			switch flagStr {
+	if r.configured {
+		return
+	}
+	r.configured = true
+
+	r.disabledChecks = disabledChecks{PrivateReceivers: true, PublicInterfaces: true}
+	r.stuttersMsg = "stutters"
+	for _, flag := range arguments {
+		switch flag := flag.(type) {
+		case string:
+			switch flag {
 			case "checkPrivateReceivers":
-				r.checkPrivateReceivers = true
+				r.disabledChecks.PrivateReceivers = false
 			case "disableStutteringCheck":
-				r.disableStutteringCheck = true
+				r.disabledChecks.Stuttering = true
 			case "sayRepetitiveInsteadOfStutters":
 				r.stuttersMsg = "is repetitive"
 			case "checkPublicInterface":
-				r.checkPublicInterface = true
+				r.disabledChecks.PublicInterfaces = false
+			case "disableChecksOnConstants":
+				r.disabledChecks.Const = true
+			case "disableChecksOnFunctions":
+				r.disabledChecks.Function = true
+			case "disableChecksOnMethods":
+				r.disabledChecks.Method = true
+			case "disableChecksOnTypes":
+				r.disabledChecks.Type = true
+			case "disableChecksOnVariables":
+				r.disabledChecks.Var = true
 			default:
-				panic(fmt.Sprintf("Unknown configuration flag %s for %s rule", flagStr, r.Name()))
+				panic(fmt.Sprintf("Unknown configuration flag %s for %s rule", flag, r.Name()))
 			}
+		default:
+			panic(fmt.Sprintf("Invalid argument for the %s rule: expecting a string, got %T", r.Name(), flag))
 		}
-		r.configured = true
 	}
 }
 
@@ -68,10 +120,8 @@ func (r *ExportedRule) Apply(file *lint.File, args lint.Arguments) []lint.Failur
 			failures = append(failures, failure)
 		},
 		genDeclMissingComments: make(map[*ast.GenDecl]bool),
-		checkPrivateReceivers:  r.checkPrivateReceivers,
-		disableStutteringCheck: r.disableStutteringCheck,
-		checkPublicInterface:   r.checkPublicInterface,
 		stuttersMsg:            r.stuttersMsg,
+		disabledChecks:         r.disabledChecks,
 	}
 
 	ast.Walk(&walker, fileAst)
@@ -90,30 +140,30 @@ type lintExported struct {
 	lastGen                *ast.GenDecl
 	genDeclMissingComments map[*ast.GenDecl]bool
 	onFailure              func(lint.Failure)
-	checkPrivateReceivers  bool
-	disableStutteringCheck bool
-	checkPublicInterface   bool
 	stuttersMsg            string
+	disabledChecks         disabledChecks
 }
 
 func (w *lintExported) lintFuncDoc(fn *ast.FuncDecl) {
 	if !ast.IsExported(fn.Name.Name) {
-		// func is unexported
-		return
+		return // func is unexported, nothing to do
 	}
+
 	kind := "function"
 	name := fn.Name.Name
-	if fn.Recv != nil && len(fn.Recv.List) > 0 {
-		// method
+	isMethod := fn.Recv != nil && len(fn.Recv.List) > 0
+	if isMethod {
 		kind = "method"
 		recv := typeparams.ReceiverType(fn)
-		if !w.checkPrivateReceivers && !ast.IsExported(recv) {
-			// receiver is unexported
+
+		if !ast.IsExported(recv) && w.disabledChecks.PrivateReceivers {
 			return
 		}
+
 		if commonMethods[name] {
 			return
 		}
+
 		switch name {
 		case "Len", "Less", "Swap":
 			sortables := w.file.Pkg.Sortable()
@@ -123,6 +173,11 @@ func (w *lintExported) lintFuncDoc(fn *ast.FuncDecl) {
 		}
 		name = recv + "." + name
 	}
+
+	if w.disabledChecks.isDisabled(kind) {
+		return
+	}
+
 	if fn.Doc == nil {
 		w.onFailure(lint.Failure{
 			Node:       fn,
@@ -132,6 +187,7 @@ func (w *lintExported) lintFuncDoc(fn *ast.FuncDecl) {
 		})
 		return
 	}
+
 	s := normalizeText(fn.Doc.Text())
 	prefix := fn.Name.Name + " "
 	if !strings.HasPrefix(s, prefix) {
@@ -145,7 +201,7 @@ func (w *lintExported) lintFuncDoc(fn *ast.FuncDecl) {
 }
 
 func (w *lintExported) checkStutter(id *ast.Ident, thing string) {
-	if w.disableStutteringCheck {
+	if w.disabledChecks.Stuttering {
 		return
 	}
 
@@ -179,9 +235,14 @@ func (w *lintExported) checkStutter(id *ast.Ident, thing string) {
 }
 
 func (w *lintExported) lintTypeDoc(t *ast.TypeSpec, doc *ast.CommentGroup) {
+	if w.disabledChecks.isDisabled("type") {
+		return
+	}
+
 	if !ast.IsExported(t.Name.Name) {
 		return
 	}
+
 	if doc == nil {
 		w.onFailure(lint.Failure{
 			Node:       t,
@@ -203,18 +264,19 @@ func (w *lintExported) lintTypeDoc(t *ast.TypeSpec, doc *ast.CommentGroup) {
 			break
 		}
 	}
+
 	// if comment starts with name of type and has some text after - it's ok
 	expectedPrefix := t.Name.Name + " "
 	if strings.HasPrefix(s, expectedPrefix) {
 		return
 	}
+
 	w.onFailure(lint.Failure{
 		Node:       doc,
 		Confidence: 1,
 		Category:   "comments",
 		Failure:    fmt.Sprintf(`comment on exported type %v should be of the form "%s..." (with optional leading article)`, t.Name, expectedPrefix),
 	})
-
 }
 
 func (w *lintExported) lintValueSpecDoc(vs *ast.ValueSpec, gd *ast.GenDecl, genDeclMissingComments map[*ast.GenDecl]bool) {
@@ -223,6 +285,10 @@ func (w *lintExported) lintValueSpecDoc(vs *ast.ValueSpec, gd *ast.GenDecl, genD
 		kind = "const"
 	}
 
+	if w.disabledChecks.isDisabled(kind) {
+		return
+	}
+
 	if len(vs.Names) > 1 {
 		// Check that none are exported except for the first.
 		for _, n := range vs.Names[1:] {
@@ -324,7 +390,7 @@ func (w *lintExported) Visit(n ast.Node) ast.Visitor {
 		w.lintTypeDoc(v, doc)
 		w.checkStutter(v.Name, "type")
 
-		if w.checkPublicInterface {
+		if !w.disabledChecks.PublicInterfaces {
 			if iface, ok := v.Type.(*ast.InterfaceType); ok {
 				if ast.IsExported(v.Name.Name) {
 					w.doCheckPublicInterface(v.Name.Name, iface)

test/exported_test.go

@@ -30,3 +30,9 @@ func TestCheckPublicInterfaceOption(t *testing.T) {
 
 	testRule(t, "exported-issue-1002", &rule.ExportedRule{}, &lint.RuleConfig{Arguments: args})
 }
+
+func TestCheckDisablingOnDeclarationTypes(t *testing.T) {
+	args := []any{"disableChecksOnConstants", "disableChecksOnFunctions", "disableChecksOnMethods", "disableChecksOnTypes", "disableChecksOnVariables"}
+
+	testRule(t, "exported-issue-1045", &rule.ExportedRule{}, &lint.RuleConfig{Arguments: args})
+}

testdata/exported-issue-1045.go

@@ -0,0 +1,25 @@
+// Package golint comment
+package golint
+
+
+// path separator defined by os.Separator.
+const FilePath = "xyz"
+
+
+// Rewrite string to remove non-standard path characters
+func UnicodeSanitize(s string) string {}
+
+
+// Tags returns a slice of tags. The order is the original tag order unless it
+// was changed.
+func (t *Tags) Keys() []string {}
+
+// A value which may be passed to the which parameter for Getitimer and
+type ItimerWhich int
+
+
+/*
+// PropertyBag 
+*/
+// Rectangle An area within an image.
+type Rectangle struct {}