dev: dedicated package about IllTypedError parsing (#4675)

pkg/goanalysis/pkgerrors/errors.go

@@ -1,4 +1,4 @@
-package goanalysis
+package pkgerrors
 
 import (
 	"errors"
@@ -7,7 +7,6 @@ import (
 	"golang.org/x/tools/go/packages"
 
 	"github.com/golangci/golangci-lint/pkg/lint/linter"
-	libpackages "github.com/golangci/golangci-lint/pkg/packages"
 	"github.com/golangci/golangci-lint/pkg/result"
 )
 
@@ -19,7 +18,7 @@ func (e *IllTypedError) Error() string {
 	return fmt.Sprintf("errors in package: %v", e.Pkg.Errors)
 }
 
-func buildIssuesFromIllTypedError(errs []error, lintCtx *linter.Context) ([]result.Issue, error) {
+func BuildIssuesFromIllTypedError(errs []error, lintCtx *linter.Context) ([]result.Issue, error) {
 	var issues []result.Issue
 	uniqReportedIssues := map[string]bool{}
 
@@ -36,8 +35,8 @@ func buildIssuesFromIllTypedError(errs []error, lintCtx *linter.Context) ([]resu
 			continue
 		}
 
-		for _, err := range libpackages.ExtractErrors(ill.Pkg) {
+		for _, err := range extractErrors(ill.Pkg) {
-			i, perr := parseError(err)
+			issue, perr := parseError(err)
 			if perr != nil { // failed to parse
 				if uniqReportedIssues[err.Msg] {
 					continue
@@ -45,8 +44,8 @@ func buildIssuesFromIllTypedError(errs []error, lintCtx *linter.Context) ([]resu
 				uniqReportedIssues[err.Msg] = true
 				lintCtx.Log.Errorf("typechecking error: %s", err.Msg)
 			} else {
-				i.Pkg = ill.Pkg // to save to cache later
+				issue.Pkg = ill.Pkg // to save to cache later
-				issues = append(issues, *i)
+				issues = append(issues, *issue)
 			}
 		}
 	}
@@ -57,16 +56,3 @@ func buildIssuesFromIllTypedError(errs []error, lintCtx *linter.Context) ([]resu
 
 	return issues, nil
 }
-
-func parseError(srcErr packages.Error) (*result.Issue, error) {
-	pos, err := libpackages.ParseErrorPosition(srcErr.Pos)
-	if err != nil {
-		return nil, err
-	}
-
-	return &result.Issue{
-		Pos:        *pos,
-		Text:       srcErr.Msg,
-		FromLinter: "typecheck",
-	}, nil
-}

pkg/goanalysis/pkgerrors/extract.go

@@ -1,4 +1,4 @@
-package packages
+package pkgerrors
 
 import (
 	"fmt"
@@ -12,7 +12,7 @@ import (
 // ex: `/example/main.go:11:17: foobar`
 var reFile = regexp.MustCompile(`^.+\.go:\d+:\d+: .+`)
 
-func ExtractErrors(pkg *packages.Package) []packages.Error {
+func extractErrors(pkg *packages.Package) []packages.Error {
 	errors := extractErrorsImpl(pkg, map[*packages.Package]bool{})
 	if len(errors) == 0 {
 		return errors
@@ -38,7 +38,7 @@ func ExtractErrors(pkg *packages.Package) []packages.Error {
 	if len(pkg.GoFiles) != 0 {
 		// errors were extracted from deps and have at least one file in package
 		for i := range uniqErrors {
-			if _, parseErr := ParseErrorPosition(uniqErrors[i].Pos); parseErr == nil {
+			if _, parseErr := parseErrorPosition(uniqErrors[i].Pos); parseErr == nil {
 				continue
 			}
 

pkg/goanalysis/pkgerrors/extract_test.go

@@ -1,4 +1,4 @@
-package packages
+package pkgerrors
 
 import (
 	"testing"

pkg/goanalysis/pkgerrors/parse.go

@@ -1,4 +1,4 @@
-package packages
+package pkgerrors
 
 import (
 	"errors"
@@ -6,9 +6,26 @@ import (
 	"go/token"
 	"strconv"
 	"strings"
+
+	"golang.org/x/tools/go/packages"
+
+	"github.com/golangci/golangci-lint/pkg/result"
 )
 
-func ParseErrorPosition(pos string) (*token.Position, error) {
+func parseError(srcErr packages.Error) (*result.Issue, error) {
+	pos, err := parseErrorPosition(srcErr.Pos)
+	if err != nil {
+		return nil, err
+	}
+
+	return &result.Issue{
+		Pos:        *pos,
+		Text:       srcErr.Msg,
+		FromLinter: "typecheck",
+	}, nil
+}
+
+func parseErrorPosition(pos string) (*token.Position, error) {
 	// file:line(<optional>:colon)
 	parts := strings.Split(pos, ":")
 	if len(parts) == 1 {

pkg/goanalysis/pkgerrors/parse_test.go

@@ -1,4 +1,4 @@
-package goanalysis
+package pkgerrors
 
 import (
 	"fmt"
@@ -8,7 +8,7 @@ import (
 	"golang.org/x/tools/go/packages"
 )
 
-func TestParseError(t *testing.T) {
+func Test_parseError(t *testing.T) {
 	cases := []struct {
 		in, out string
 		good    bool

pkg/goanalysis/runner_action.go

@@ -15,6 +15,7 @@ import (
 
 	"github.com/golangci/golangci-lint/internal/errorutil"
 	"github.com/golangci/golangci-lint/internal/pkgcache"
+	"github.com/golangci/golangci-lint/pkg/goanalysis/pkgerrors"
 )
 
 type actionAllocator struct {
@@ -184,7 +185,7 @@ func (act *action) analyze() {
 		// It looks like there should be !pass.Analyzer.RunDespiteErrors
 		// but govet's cgocall crashes on it. Govet itself contains !pass.Analyzer.RunDespiteErrors condition here,
 		// but it exits before it if packages.Load have failed.
-		act.err = fmt.Errorf("analysis skipped: %w", &IllTypedError{Pkg: act.pkg})
+		act.err = fmt.Errorf("analysis skipped: %w", &pkgerrors.IllTypedError{Pkg: act.pkg})
 	} else {
 		startedAt = time.Now()
 		act.result, act.err = pass.Analyzer.Run(pass)

pkg/goanalysis/runners.go

@@ -13,6 +13,7 @@ import (
 	"golang.org/x/tools/go/packages"
 
 	"github.com/golangci/golangci-lint/internal/pkgcache"
+	"github.com/golangci/golangci-lint/pkg/goanalysis/pkgerrors"
 	"github.com/golangci/golangci-lint/pkg/lint/linter"
 	"github.com/golangci/golangci-lint/pkg/logutils"
 	"github.com/golangci/golangci-lint/pkg/result"
@@ -74,7 +75,7 @@ func runAnalyzers(cfg runAnalyzersConfig, lintCtx *linter.Context) ([]result.Iss
 		return retIssues
 	}
 
-	errIssues, err := buildIssuesFromIllTypedError(errs, lintCtx)
+	errIssues, err := pkgerrors.BuildIssuesFromIllTypedError(errs, lintCtx)
 	if err != nil {
 		return nil, err
 	}