chore: enable errorf of perfsprint linter

.golangci.yaml

@@ -17,6 +17,7 @@ linters:
     - gomodguard
     - gosimple
     - govet
+    - importas
     - ineffassign
     - misspell
     - perfsprint
@@ -47,13 +48,17 @@ linters-settings:
         - github.com/pkg/errors:
             recommendations:
               - errors
+  importas:
+    alias:
+      - alias: stderrors
+        pkg: errors
   perfsprint:
     # Optimizes even if it requires an int or uint type cast.
     int-conversion: true
     # Optimizes into `err.Error()` even if it is only equivalent for non-nil errors.
     err-error: true
     # Optimizes `fmt.Errorf`.
-    errorf: false
+    errorf: true
     # Optimizes `fmt.Sprintf` with only one argument.
     sprintf1: true
     # Optimizes into strings concatenation.

applicationset/controllers/applicationset_controller_test.go

@@ -3,6 +3,7 @@ package controllers
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"strconv"
 	"testing"
@@ -1864,7 +1865,7 @@ func TestRequeueGeneratorFails(t *testing.T) {
 	generatorMock.On("GetTemplate", &generator).
 		Return(&v1alpha1.ApplicationSetTemplate{})
 	generatorMock.On("GenerateParams", &generator, mock.AnythingOfType("*v1alpha1.ApplicationSet"), mock.Anything).
-		Return([]map[string]interface{}{}, fmt.Errorf("Simulated error generating params that could be related to an external service/API call"))
+		Return([]map[string]interface{}{}, errors.New("Simulated error generating params that could be related to an external service/API call"))
 
 	metrics := appsetmetrics.NewFakeAppsetMetrics(client)
 
@@ -1969,7 +1970,7 @@ func TestValidateGeneratedApplications(t *testing.T) {
 					},
 				},
 			},
-			validationErrors: map[int]error{0: fmt.Errorf("application destination spec is invalid: application destination can't have both name and server defined: my-cluster my-server")},
+			validationErrors: map[int]error{0: errors.New("application destination spec is invalid: application destination can't have both name and server defined: my-cluster my-server")},
 		},
 		{
 			name: "project mismatch should return error",
@@ -1991,7 +1992,7 @@ func TestValidateGeneratedApplications(t *testing.T) {
 					},
 				},
 			},
-			validationErrors: map[int]error{0: fmt.Errorf("application references project DOES-NOT-EXIST which does not exist")},
+			validationErrors: map[int]error{0: errors.New("application references project DOES-NOT-EXIST which does not exist")},
 		},
 		{
 			name: "valid app should return true",
@@ -2035,7 +2036,7 @@ func TestValidateGeneratedApplications(t *testing.T) {
 					},
 				},
 			},
-			validationErrors: map[int]error{0: fmt.Errorf("application destination spec is invalid: unable to find destination server: there are no clusters with this name: nonexistent-cluster")},
+			validationErrors: map[int]error{0: errors.New("application destination spec is invalid: unable to find destination server: there are no clusters with this name: nonexistent-cluster")},
 		},
 	} {
 		t.Run(cc.name, func(t *testing.T) {

applicationset/controllers/template/template_test.go

@@ -1,7 +1,7 @@
 package template
 
 import (
-	"fmt"
+	"errors"
 	"maps"
 	"testing"
 
@@ -53,7 +53,7 @@ func TestGenerateApplications(t *testing.T) {
 		},
 		{
 			name:                "Handles error from the generator",
-			generateParamsError: fmt.Errorf("error"),
+			generateParamsError: errors.New("error"),
 			expectErr:           true,
 			expectedReason:      v1alpha1.ApplicationSetReasonApplicationParamsGenerationError,
 		},
@@ -68,7 +68,7 @@ func TestGenerateApplications(t *testing.T) {
 				},
 				Spec: v1alpha1.ApplicationSpec{},
 			},
-			rendererError:  fmt.Errorf("error"),
+			rendererError:  errors.New("error"),
 			expectErr:      true,
 			expectedReason: v1alpha1.ApplicationSetReasonRenderTemplateParamsError,
 		},

applicationset/generators/cluster_test.go

@@ -2,7 +2,7 @@ package generators
 
 import (
 	"context"
-	"fmt"
+	"errors"
 	"testing"
 
 	corev1 "k8s.io/api/core/v1"
@@ -27,7 +27,7 @@ type possiblyErroringFakeCtrlRuntimeClient struct {
 
 func (p *possiblyErroringFakeCtrlRuntimeClient) List(ctx context.Context, secretList client.ObjectList, opts ...client.ListOption) error {
 	if p.shouldError {
-		return fmt.Errorf("could not list Secrets")
+		return errors.New("could not list Secrets")
 	}
 	return p.Client.List(ctx, secretList, opts...)
 }
@@ -227,7 +227,7 @@ func TestGenerateParams(t *testing.T) {
 			values:        nil,
 			expected:      nil,
 			clientError:   true,
-			expectedError: fmt.Errorf("error getting cluster secrets: could not list Secrets"),
+			expectedError: errors.New("error getting cluster secrets: could not list Secrets"),
 		},
 		{
 			name:     "flat mode without selectors",
@@ -677,7 +677,7 @@ func TestGenerateParamsGoTemplate(t *testing.T) {
 			values:        nil,
 			expected:      nil,
 			clientError:   true,
-			expectedError: fmt.Errorf("error getting cluster secrets: could not list Secrets"),
+			expectedError: errors.New("error getting cluster secrets: could not list Secrets"),
 		},
 		{
 			name:       "Clusters with flat list mode and no selector",

applicationset/generators/duck_type.go

@@ -2,6 +2,7 @@ package generators
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"strings"
 	"time"
@@ -96,13 +97,13 @@ func (g *DuckTypeGenerator) GenerateParams(appSetGenerator *argoprojiov1alpha1.A
 	// Validate the fields
 	if kind == "" || versionIdx < 1 {
 		log.Warningf("kind=%v, resourceName=%v, versionIdx=%v", kind, resourceName, versionIdx)
-		return nil, fmt.Errorf("There is a problem with the apiVersion, kind or resourceName provided")
+		return nil, errors.New("There is a problem with the apiVersion, kind or resourceName provided")
 	}
 
 	if (resourceName == "" && labelSelector.MatchLabels == nil && labelSelector.MatchExpressions == nil) ||
 		(resourceName != "" && (labelSelector.MatchExpressions != nil || labelSelector.MatchLabels != nil)) {
 		log.Warningf("You must choose either resourceName=%v, labelSelector.matchLabels=%v or labelSelect.matchExpressions=%v", resourceName, labelSelector.MatchLabels, labelSelector.MatchExpressions)
-		return nil, fmt.Errorf("There is a problem with the definition of the ClusterDecisionResource generator")
+		return nil, errors.New("There is a problem with the definition of the ClusterDecisionResource generator")
 	}
 
 	// Split up the apiVersion
@@ -130,7 +131,7 @@ func (g *DuckTypeGenerator) GenerateParams(appSetGenerator *argoprojiov1alpha1.A
 
 	if len(duckResources.Items) == 0 {
 		log.Warning("no resource found, make sure you clusterDecisionResource is defined correctly")
-		return nil, fmt.Errorf("no clusterDecisionResources found")
+		return nil, errors.New("no clusterDecisionResources found")
 	}
 
 	// Override the duck type in the status of the resource

applicationset/generators/duck_type_test.go

@@ -2,7 +2,7 @@ package generators
 
 import (
 	"context"
-	"fmt"
+	"errors"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -160,7 +160,7 @@ func TestGenerateParamsForDuckType(t *testing.T) {
 			resource:      duckType,
 			values:        nil,
 			expected:      []map[string]interface{}{},
-			expectedError: fmt.Errorf("There is a problem with the definition of the ClusterDecisionResource generator"),
+			expectedError: errors.New("There is a problem with the definition of the ClusterDecisionResource generator"),
 		},
 		/*** This does not work with the FAKE runtime client, fieldSelectors are broken.
 		{
@@ -271,7 +271,7 @@ func TestGenerateParamsForDuckType(t *testing.T) {
 			resource:      duckType,
 			values:        nil,
 			expected:      nil,
-			expectedError: fmt.Errorf("There is a problem with the definition of the ClusterDecisionResource generator"),
+			expectedError: errors.New("There is a problem with the definition of the ClusterDecisionResource generator"),
 		},
 	}
 
@@ -456,7 +456,7 @@ func TestGenerateParamsForDuckTypeGoTemplate(t *testing.T) {
 			resource:      duckType,
 			values:        nil,
 			expected:      []map[string]interface{}{},
-			expectedError: fmt.Errorf("There is a problem with the definition of the ClusterDecisionResource generator"),
+			expectedError: errors.New("There is a problem with the definition of the ClusterDecisionResource generator"),
 		},
 		/*** This does not work with the FAKE runtime client, fieldSelectors are broken.
 		{
@@ -567,7 +567,7 @@ func TestGenerateParamsForDuckTypeGoTemplate(t *testing.T) {
 			resource:      duckType,
 			values:        nil,
 			expected:      nil,
-			expectedError: fmt.Errorf("There is a problem with the definition of the ClusterDecisionResource generator"),
+			expectedError: errors.New("There is a problem with the definition of the ClusterDecisionResource generator"),
 		},
 	}
 

applicationset/generators/git_test.go

@@ -1,6 +1,7 @@
 package generators
 
 import (
+	"errors"
 	"fmt"
 	"testing"
 
@@ -307,9 +308,9 @@ func TestGitGenerateParamsFromDirectories(t *testing.T) {
 			name:          "handles error from repo server",
 			directories:   []argoprojiov1alpha1.GitDirectoryGeneratorItem{{Path: "*"}},
 			repoApps:      []string{},
-			repoError:     fmt.Errorf("error"),
+			repoError:     errors.New("error"),
 			expected:      []map[string]interface{}{},
-			expectedError: fmt.Errorf("error generating params from git: error getting directories from repo: error"),
+			expectedError: errors.New("error generating params from git: error getting directories from repo: error"),
 		},
 	}
 
@@ -608,9 +609,9 @@ func TestGitGenerateParamsFromDirectoriesGoTemplate(t *testing.T) {
 			name:          "handles error from repo server",
 			directories:   []argoprojiov1alpha1.GitDirectoryGeneratorItem{{Path: "*"}},
 			repoApps:      []string{},
-			repoError:     fmt.Errorf("error"),
+			repoError:     errors.New("error"),
 			expected:      []map[string]interface{}{},
-			expectedError: fmt.Errorf("error generating params from git: error getting directories from repo: error"),
+			expectedError: errors.New("error generating params from git: error getting directories from repo: error"),
 		},
 	}
 
@@ -808,9 +809,9 @@ func TestGitGenerateParamsFromFiles(t *testing.T) {
 			name:             "handles error during getting repo paths",
 			files:            []argoprojiov1alpha1.GitFileGeneratorItem{{Path: "**/config.json"}},
 			repoFileContents: map[string][]byte{},
-			repoPathsError:   fmt.Errorf("paths error"),
+			repoPathsError:   errors.New("paths error"),
 			expected:         []map[string]interface{}{},
-			expectedError:    fmt.Errorf("error generating params from git: paths error"),
+			expectedError:    errors.New("error generating params from git: paths error"),
 		},
 		{
 			name:  "test invalid JSON file returns error",
@@ -820,7 +821,7 @@ func TestGitGenerateParamsFromFiles(t *testing.T) {
 			},
 			repoPathsError: nil,
 			expected:       []map[string]interface{}{},
-			expectedError:  fmt.Errorf("error generating params from git: unable to process file 'cluster-config/production/config.json': unable to parse file: error unmarshaling JSON: while decoding JSON: json: cannot unmarshal string into Go value of type map[string]interface {}"),
+			expectedError:  errors.New("error generating params from git: unable to process file 'cluster-config/production/config.json': unable to parse file: error unmarshaling JSON: while decoding JSON: json: cannot unmarshal string into Go value of type map[string]interface {}"),
 		},
 		{
 			name:  "test JSON array",
@@ -1120,9 +1121,9 @@ func TestGitGenerateParamsFromFilesGoTemplate(t *testing.T) {
 			name:             "handles error during getting repo paths",
 			files:            []argoprojiov1alpha1.GitFileGeneratorItem{{Path: "**/config.json"}},
 			repoFileContents: map[string][]byte{},
-			repoPathsError:   fmt.Errorf("paths error"),
+			repoPathsError:   errors.New("paths error"),
 			expected:         []map[string]interface{}{},
-			expectedError:    fmt.Errorf("error generating params from git: paths error"),
+			expectedError:    errors.New("error generating params from git: paths error"),
 		},
 		{
 			name:  "test invalid JSON file returns error",
@@ -1132,7 +1133,7 @@ func TestGitGenerateParamsFromFilesGoTemplate(t *testing.T) {
 			},
 			repoPathsError: nil,
 			expected:       []map[string]interface{}{},
-			expectedError:  fmt.Errorf("error generating params from git: unable to process file 'cluster-config/production/config.json': unable to parse file: error unmarshaling JSON: while decoding JSON: json: cannot unmarshal string into Go value of type map[string]interface {}"),
+			expectedError:  errors.New("error generating params from git: unable to process file 'cluster-config/production/config.json': unable to parse file: error unmarshaling JSON: while decoding JSON: json: cannot unmarshal string into Go value of type map[string]interface {}"),
 		},
 		{
 			name:  "test JSON array",
@@ -1464,7 +1465,7 @@ func TestGitGenerator_GenerateParams(t *testing.T) {
 			},
 			callGetDirectories: false,
 			expected:           []map[string]interface{}{{"path": "app1", "path.basename": "app1", "path.basenameNormalized": "app1", "path[0]": "app1", "values.foo": "bar"}},
-			expectedError:      fmt.Errorf("error getting project project: appprojects.argoproj.io \"project\" not found"),
+			expectedError:      errors.New("error getting project project: appprojects.argoproj.io \"project\" not found"),
 		},
 	}
 	for _, testCase := range cases {

applicationset/generators/interface.go

@@ -1,7 +1,7 @@
 package generators
 
 import (
-	"fmt"
+	"errors"
 	"time"
 
 	"sigs.k8s.io/controller-runtime/pkg/client"
@@ -27,7 +27,7 @@ type Generator interface {
 }
 
 var (
-	EmptyAppSetGeneratorError = fmt.Errorf("ApplicationSet is empty")
+	EmptyAppSetGeneratorError = errors.New("ApplicationSet is empty")
 	NoRequeueAfter            time.Duration
 )
 

applicationset/generators/list.go

@@ -2,6 +2,7 @@ package generators
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"time"
 
@@ -54,7 +55,7 @@ func (g *ListGenerator) GenerateParams(appSetGenerator *argoprojiov1alpha1.Appli
 				if key == "values" {
 					values, ok := (value).(map[string]interface{})
 					if !ok {
-						return nil, fmt.Errorf("error parsing values map")
+						return nil, errors.New("error parsing values map")
 					}
 					for k, v := range values {
 						value, ok := v.(string)

applicationset/generators/matrix.go

@@ -1,6 +1,7 @@
 package generators
 
 import (
+	"errors"
 	"fmt"
 	"time"
 
@@ -16,9 +17,9 @@ import (
 var _ Generator = (*MatrixGenerator)(nil)
 
 var (
-	ErrMoreThanTwoGenerators      = fmt.Errorf("found more than two generators, Matrix support only two")
-	ErrLessThanTwoGenerators      = fmt.Errorf("found less than two generators, Matrix support only two")
-	ErrMoreThenOneInnerGenerators = fmt.Errorf("found more than one generator in matrix.Generators")
+	ErrMoreThanTwoGenerators      = errors.New("found more than two generators, Matrix support only two")
+	ErrLessThanTwoGenerators      = errors.New("found less than two generators, Matrix support only two")
+	ErrMoreThenOneInnerGenerators = errors.New("found more than one generator in matrix.Generators")
 )
 
 type MatrixGenerator struct {
@@ -125,7 +126,7 @@ func (m *MatrixGenerator) getParams(appSetBaseGenerator argoprojiov1alpha1.Appli
 	}
 
 	if len(t) == 0 {
-		return nil, fmt.Errorf("child generator generated no parameters")
+		return nil, errors.New("child generator generated no parameters")
 	}
 
 	if len(t) > 1 {

applicationset/generators/merge.go

@@ -2,6 +2,7 @@ package generators
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"time"
 
@@ -17,9 +18,9 @@ import (
 var _ Generator = (*MergeGenerator)(nil)
 
 var (
-	ErrLessThanTwoGeneratorsInMerge = fmt.Errorf("found less than two generators, Merge requires two or more")
-	ErrNoMergeKeys                  = fmt.Errorf("no merge keys were specified, Merge requires at least one")
-	ErrNonUniqueParamSets           = fmt.Errorf("the parameters from a generator were not unique by the given mergeKeys, Merge requires all param sets to be unique")
+	ErrLessThanTwoGeneratorsInMerge = errors.New("found less than two generators, Merge requires two or more")
+	ErrNoMergeKeys                  = errors.New("no merge keys were specified, Merge requires at least one")
+	ErrNonUniqueParamSets           = errors.New("the parameters from a generator were not unique by the given mergeKeys, Merge requires all param sets to be unique")
 )
 
 type MergeGenerator struct {
@@ -182,7 +183,7 @@ func (m *MergeGenerator) getParams(appSetBaseGenerator argoprojiov1alpha1.Applic
 	}
 
 	if len(t) == 0 {
-		return nil, fmt.Errorf("child generator generated no parameters")
+		return nil, errors.New("child generator generated no parameters")
 	}
 
 	if len(t) > 1 {