typecheck: display compilation errors as report instead of error

pkg/golinters/goanalysis/runner_action.go

@@ -177,21 +177,19 @@ func (act *action) analyze() {
 	act.r.passToPkg[pass] = act.pkg
 	act.r.passToPkgGuard.Unlock()
 
-	var err error
 	if act.pkg.IllTyped {
 		// 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 exit before it if packages.Load have failed.
-		err = errors.Wrap(&IllTypedError{Pkg: act.pkg}, "analysis skipped")
+		act.err = errors.Wrap(&IllTypedError{Pkg: act.pkg}, "analysis skipped")
 	} else {
 		startedAt = time.Now()
-		act.result, err = pass.Analyzer.Run(pass)
+		act.result, act.err = pass.Analyzer.Run(pass)
 		analyzedIn := time.Since(startedAt)
 		if analyzedIn > time.Millisecond*10 {
 			debugf("%s: run analyzer in %s", act, analyzedIn)
 		}
 	}
-	act.err = err
 
 	// disallow calls after Run
 	pass.ExportObjectFact = nil

pkg/golinters/goanalysis/runners.go

@@ -79,9 +79,7 @@ func runAnalyzers(cfg runAnalyzersConfig, lintCtx *linter.Context) ([]result.Iss
 	}
 
 	issues = append(issues, errIssues...)
-	if len(errIssues) == 0 {
-		issues = append(issues, buildAllIssues()...)
-	}
+	issues = append(issues, buildAllIssues()...)
 
 	return issues, nil
 }

pkg/packages/util.go

@@ -2,6 +2,7 @@ package packages
 
 import (
 	"fmt"
+	"strings"
 
 	"golang.org/x/tools/go/packages"
 )
@@ -15,22 +16,30 @@ func ExtractErrors(pkg *packages.Package) []packages.Error {
 	seenErrors := map[string]bool{}
 	var uniqErrors []packages.Error
 	for _, err := range errors {
-		if seenErrors[err.Msg] {
+		msg := stackCrusher(err.Error())
+		if seenErrors[msg] {
 			continue
 		}
-		seenErrors[err.Msg] = true
+
+		if msg != err.Error() {
+			continue
+		}
+
+		seenErrors[msg] = true
+
 		uniqErrors = append(uniqErrors, err)
 	}
 
 	if len(pkg.GoFiles) != 0 {
-		// errors were extracted from deps and have at leat one file in package
+		// errors were extracted from deps and have at least one file in package
 		for i := range uniqErrors {
-			_, parseErr := ParseErrorPosition(uniqErrors[i].Pos)
-			if parseErr != nil {
-				// change pos to local file to properly process it by processors (properly read line etc)
-				uniqErrors[i].Msg = fmt.Sprintf("%s: %s", uniqErrors[i].Pos, uniqErrors[i].Msg)
-				uniqErrors[i].Pos = fmt.Sprintf("%s:1", pkg.GoFiles[0])
+			if _, parseErr := ParseErrorPosition(uniqErrors[i].Pos); parseErr == nil {
+				continue
 			}
+
+			// change pos to local file to properly process it by processors (properly read line etc)
+			uniqErrors[i].Msg = fmt.Sprintf("%s: %s", uniqErrors[i].Pos, uniqErrors[i].Msg)
+			uniqErrors[i].Pos = fmt.Sprintf("%s:1", pkg.GoFiles[0])
 		}
 
 		// some errors like "code in directory  expects import" don't have Pos, set it here
@@ -55,7 +64,7 @@ func extractErrorsImpl(pkg *packages.Package, seenPackages map[*packages.Package
 		return nil
 	}
 
-	if len(pkg.Errors) != 0 {
+	if len(pkg.Errors) > 0 {
 		return pkg.Errors
 	}
 
@@ -69,3 +78,16 @@ func extractErrorsImpl(pkg *packages.Package, seenPackages map[*packages.Package
 
 	return errors
 }
+
+func stackCrusher(msg string) string {
+	index := strings.Index(msg, "(")
+	lastIndex := strings.LastIndex(msg, ")")
+
+	if index == -1 || index == len(msg)-1 || lastIndex == -1 || lastIndex != len(msg)-1 {
+		return msg
+	}
+
+	frag := msg[index+1 : lastIndex]
+
+	return stackCrusher(frag)
+}

pkg/packages/util_test.go

@@ -0,0 +1,43 @@
+package packages
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+//nolint:lll
+func Test_stackCrusher(t *testing.T) {
+	testCases := []struct {
+		desc     string
+		stack    string
+		expected string
+	}{
+		{
+			desc:     "large stack",
+			stack:    `/home/ldez/sources/go/src/github.com/golangci/golangci-lint/pkg/result/processors/nolint.go:13:2: /home/ldez/sources/go/src/github.com/golangci/golangci-lint/pkg/result/processors/nolint.go:13:2: could not import github.com/golangci/golangci-lint/pkg/lint/lintersdb (/home/ldez/sources/go/src/github.com/golangci/golangci-lint/pkg/lint/lintersdb/manager.go:13:2: could not import github.com/golangci/golangci-lint/pkg/golinters (/home/ldez/sources/go/src/github.com/golangci/golangci-lint/pkg/golinters/deadcode.go:21:9: undeclared name: linterName))`,
+			expected: "/home/ldez/sources/go/src/github.com/golangci/golangci-lint/pkg/golinters/deadcode.go:21:9: undeclared name: linterName",
+		},
+		{
+			desc:     "no stack",
+			stack:    `/home/ldez/sources/go/src/github.com/golangci/golangci-lint/pkg/golinters/deadcode.go:45:3: undeclared name: linterName`,
+			expected: "/home/ldez/sources/go/src/github.com/golangci/golangci-lint/pkg/golinters/deadcode.go:45:3: undeclared name: linterName",
+		},
+		{
+			desc:     "no stack but message with parenthesis",
+			stack:    `/home/ldez/sources/go/src/github.com/golangci/golangci-lint/pkg/golinters/deadcode.go:20:32: cannot use mu (variable of type sync.Mutex) as goanalysis.Issue value in argument to append`,
+			expected: "/home/ldez/sources/go/src/github.com/golangci/golangci-lint/pkg/golinters/deadcode.go:20:32: cannot use mu (variable of type sync.Mutex) as goanalysis.Issue value in argument to append",
+		},
+	}
+
+	for _, test := range testCases {
+		test := test
+		t.Run(test.desc, func(t *testing.T) {
+			t.Parallel()
+
+			actual := stackCrusher(test.stack)
+
+			assert.Equal(t, test.expected, actual)
+		})
+	}
+}