Add forbidigo linter

Forbidigo forbids identifiers.  It can be used to forbid code that is useful
for debugging but should not be merged to the master branch.

Author: ashanbrown

.golangci.example.yml

@@ -392,6 +392,12 @@ linters-settings:
   makezero:
     # Allow only slices initialized with a length of zero. Default is false.
     always: false
+  forbidigo:
+    # Forbid the following identifiers
+    forbid:
+      - fmt.Errorf # consider errors.Errorf in github.com/pkg/errors
+      - fmt.Print.* # too much log noise
+      - ginkgo\\.F.* # these are used just for local development
 
   # The custom section can be used to define linter plugins to be loaded at runtime. See README doc
   #  for more info.

go.mod

@@ -6,6 +6,7 @@ require (
 	4d63.com/gochecknoglobals v0.0.0-20201008074935-acfc0b28355a
 	github.com/Djarvur/go-err113 v0.0.0-20200511133814-5174e21577d5
 	github.com/OpenPeeDeeP/depguard v1.0.1
+	github.com/ashanbrown/forbidigo v1.0.0
 	github.com/ashanbrown/makezero v0.0.0-20201205152432-7b7cdbb3025a
 	github.com/bombsimon/wsl/v3 v3.1.0
 	github.com/daixiang0/gci v0.2.7

go.sum

@@ -269,6 +269,7 @@ type LintersSettings struct {
 	ErrorLint   ErrorLintSettings
 	Makezero    MakezeroSettings
 	Thelper     ThelperSettings
+	Forbidigo   ForbidigoSettings
 
 	Custom map[string]CustomLinterSettings
 }
@@ -406,6 +407,10 @@ type ThelperSettings struct {
 	} `mapstructure:"benchmark"`
 }
 
+type ForbidigoSettings struct {
+	Forbid []string `mapstructure:"forbid"`
+}
+
 var defaultLintersSettings = LintersSettings{
 	Lll: LllSettings{
 		LineLength: 120,

pkg/config/config.go

@@ -0,0 +1,63 @@
+package golinters
+
+import (
+	"sync"
+
+	"github.com/ashanbrown/forbidigo/forbidigo"
+	"github.com/pkg/errors"
+	"golang.org/x/tools/go/analysis"
+
+	"github.com/golangci/golangci-lint/pkg/golinters/goanalysis"
+	"github.com/golangci/golangci-lint/pkg/lint/linter"
+	"github.com/golangci/golangci-lint/pkg/result"
+)
+
+const forbidigoName = "forbidigo"
+
+func NewForbidigo() *goanalysis.Linter {
+	var mu sync.Mutex
+	var resIssues []goanalysis.Issue
+
+	analyzer := &analysis.Analyzer{
+		Name: forbidigoName,
+		Doc:  goanalysis.TheOnlyanalyzerDoc,
+	}
+	return goanalysis.NewLinter(
+		forbidigoName,
+		"Forbids identifiers",
+		[]*analysis.Analyzer{analyzer},
+		nil,
+	).WithContextSetter(func(lintCtx *linter.Context) {
+		s := &lintCtx.Settings().Forbidigo
+
+		analyzer.Run = func(pass *analysis.Pass) (interface{}, error) {
+			var res []goanalysis.Issue
+			linter, err := forbidigo.NewLinter(s.Forbid)
+			if err != nil {
+				return nil, errors.Wrapf(err, "failed to create linter %q", forbidigoName)
+			}
+			for _, file := range pass.Files {
+				hints, err := linter.Run(pass.Fset, file)
+				if err != nil {
+					return nil, errors.Wrapf(err, "forbidigo linter failed on file %q", file.Name.String())
+				}
+				for _, hint := range hints {
+					res = append(res, goanalysis.NewIssue(&result.Issue{
+						Pos:        hint.Position(),
+						Text:       hint.Details(),
+						FromLinter: makezeroName,
+					}, pass))
+				}
+			}
+			if len(res) == 0 {
+				return nil, nil
+			}
+			mu.Lock()
+			resIssues = append(resIssues, res...)
+			mu.Unlock()
+			return nil, nil
+		}
+	}).WithIssuesReporter(func(*linter.Context) []goanalysis.Issue {
+		return resIssues
+	}).WithLoadMode(goanalysis.LoadModeSyntax)
+}

pkg/golinters/forbidigo.go

@@ -337,6 +337,9 @@ func (m Manager) GetAllSupportedLinterConfigs() []*linter.Config {
 		linter.NewConfig(golinters.NewMakezero()).
 			WithPresets(linter.PresetStyle, linter.PresetBugs).
 			WithURL("https://github.com/ashanbrown/makezero"),
+		linter.NewConfig(golinters.NewForbidigo()).
+			WithPresets(linter.PresetStyle).
+			WithURL("https://github.com/ashanbrown/forbidigo"),
 
 		// nolintlint must be last because it looks at the results of all the previous linters for unused nolint directives
 		linter.NewConfig(golinters.NewNoLintLint()).

pkg/lint/lintersdb/manager.go

@@ -0,0 +1,4 @@
+linters-settings:
+  forbidigo:
+    forbid:
+      - fmt\.Print.*

test/testdata/configs/forbidigo.yml

@@ -0,0 +1,9 @@
+//args: -Eforbidigo
+//config_path: testdata/configs/forbidigo.yml
+package testdata
+
+import "fmt"
+
+func Forbidigo() {
+	fmt.Printf("too noisy!!!") // ERROR "use of `fmt.Printf` forbidden by pattern `fmt\\.Print.*`"
+}