deps: replace multierr with native errors.Join

Signed-off-by: Paul Meyer <49727155+katexochen@users.noreply.github.com>

internal/config/config.go

@@ -36,7 +36,6 @@ import (
 	ut "github.com/go-playground/universal-translator"
 	"github.com/go-playground/validator/v10"
 	en_translations "github.com/go-playground/validator/v10/translations/en"
-	"go.uber.org/multierr"
 )
 
 // Measurements is a required alias since docgen is not able to work with
@@ -586,12 +585,10 @@ func (c *Config) Validate(force bool) error {
 		return err
 	}
 
-	var validationErrors error
+	var validationErrMsgs []string
 	for _, e := range errs {
-		validationErrors = multierr.Append(
-			validationErrors,
-			errors.New(e.Translate(trans)),
-		)
+		validationErrMsgs = append(validationErrMsgs, e.Translate(trans))
 	}
-	return validationErrors
+
+	return &ValidationError{validationErrMsgs: validationErrMsgs}
 }

internal/config/config_test.go

@@ -23,7 +23,6 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/goleak"
-	"go.uber.org/multierr"
 )
 
 func TestMain(m *testing.M) {
@@ -185,19 +184,13 @@ func TestNewWithDefaultOptions(t *testing.T) {
 }
 
 func TestValidate(t *testing.T) {
-	const defaultErrCount = 21 // expect this number of error messages by default because user-specific values are not set and multiple providers are defined by default
-	const azErrCount = 9
-	const gcpErrCount = 6
-
 	testCases := map[string]struct {
-		cnf          *Config
-		wantErr      bool
-		wantErrCount int
+		cnf     *Config
+		wantErr bool
 	}{
 		"default config is not valid": {
-			cnf:          Default(),
-			wantErr:      true,
-			wantErrCount: defaultErrCount,
+			cnf:     Default(),
+			wantErr: true,
 		},
 		"v0 is one error": {
 			cnf: func() *Config {
@@ -205,8 +198,7 @@ func TestValidate(t *testing.T) {
 				cnf.Version = "v0"
 				return cnf
 			}(),
-			wantErr:      true,
-			wantErrCount: defaultErrCount + 1,
+			wantErr: true,
 		},
 		"v0 and negative state disk are two errors": {
 			cnf: func() *Config {
@@ -215,8 +207,7 @@ func TestValidate(t *testing.T) {
 				cnf.StateDiskSizeGB = -1
 				return cnf
 			}(),
-			wantErr:      true,
-			wantErrCount: defaultErrCount + 2,
+			wantErr: true,
 		},
 		"default Azure config is not valid": {
 			cnf: func() *Config {
@@ -226,8 +217,7 @@ func TestValidate(t *testing.T) {
 				cnf.Provider.Azure = az
 				return cnf
 			}(),
-			wantErr:      true,
-			wantErrCount: azErrCount,
+			wantErr: true,
 		},
 		"Azure config with all required fields is valid": {
 			cnf: func() *Config {
@@ -255,8 +245,7 @@ func TestValidate(t *testing.T) {
 				cnf.Provider.GCP = gcp
 				return cnf
 			}(),
-			wantErr:      true,
-			wantErrCount: gcpErrCount,
+			wantErr: true,
 		},
 		"GCP config with all required fields is valid": {
 			cnf: func() *Config {
@@ -302,7 +291,6 @@ func TestValidate(t *testing.T) {
 			err := tc.cnf.Validate(false)
 			if tc.wantErr {
 				assert.Error(err)
-				assert.Len(multierr.Errors(err), tc.wantErrCount)
 				return
 			}
 			assert.NoError(err)

internal/config/validation.go

@@ -10,7 +10,6 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
-	"io"
 	"os"
 	"sort"
 	"strconv"
@@ -25,22 +24,27 @@ import (
 	"github.com/edgelesssys/constellation/v2/internal/versionsapi"
 	ut "github.com/go-playground/universal-translator"
 	"github.com/go-playground/validator/v10"
-	"go.uber.org/multierr"
 	"golang.org/x/mod/semver"
 )
 
-// DisplayValidationErrors shows all validation errors inside configError as one formatted string.
-func DisplayValidationErrors(errWriter io.Writer, configError error) error {
-	errs := multierr.Errors(configError)
-	if errs != nil {
-		fmt.Fprintln(errWriter, "Problems validating config file:")
-		for _, err := range errs {
-			fmt.Fprintln(errWriter, "\t"+err.Error())
-		}
-		fmt.Fprintln(errWriter, "Fix the invalid entries or generate a new configuration using `constellation config generate`")
-		return errors.New("invalid configuration")
+// ValidationError occurs when the validation of a config fails.
+// It contains a list of errors that occurred during validation.
+type ValidationError struct {
+	validationErrMsgs []string
+}
+
+func (e *ValidationError) Error() string {
+	return "invalid configuration"
+}
+
+// LongMessage prints the errors that occurred during validation in a verbose and user friendly way.
+func (e *ValidationError) LongMessage() string {
+	msg := "Problems validating config file:\n"
+	for _, ve := range e.validationErrMsgs {
+		msg += fmt.Sprintf("\t%s\n", ve)
 	}
-	return nil
+	msg += "Fix the invalid entries or generate a new configuration using `constellation config generate`"
+	return msg
 }
 
 func registerInvalidK8sVersionError(ut ut.Translator) error {