Remove bad package name "util"

Address Nic's comments: FWIW packages named util are considered an
anti-pattern. See "bad package names" at https://blog.golang.org/package-names

Signed-off-by: zzxwill <zzxwill@gmail.com>

pkg/clients/alibaba.go

@@ -14,4 +14,155 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package clients
+package alibabacloud
+
+import (
+	"fmt"
+
+	"github.com/crossplane/crossplane-runtime/pkg/resource"
+	"github.com/pkg/errors"
+	"golang.org/x/net/context"
+	"gopkg.in/yaml.v2"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/types"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+
+	nas "github.com/crossplane/provider-alibaba/apis/nas/v1alpha1"
+	oss "github.com/crossplane/provider-alibaba/apis/oss/v1alpha1"
+	slb "github.com/crossplane/provider-alibaba/apis/slb/v1alpha1"
+	sls "github.com/crossplane/provider-alibaba/apis/sls/v1alpha1"
+	aliv1beta1 "github.com/crossplane/provider-alibaba/apis/v1beta1"
+)
+
+// Domain is Alibaba Cloud Domain
+const Domain = "aliyuncs.com"
+
+const (
+	// ErrPrepareClientEstablishmentInfo is the error of failing to prepare all the information for establishing an SDK client
+	ErrPrepareClientEstablishmentInfo = "failed to prepare all the information for establishing an SDK client"
+	errTrackUsage                     = "cannot track provider config usage"
+
+	errRegionNotValid            = "region is not valid"
+	errCloudResourceNotSupported = "cloud resource is not supported"
+
+	// ErrGetProviderConfig is the error of getting provider config
+	ErrGetProviderConfig = "failed to get ProviderConfig"
+	// ErrGetCredentials is the error of getting credentials
+	ErrGetCredentials             = "cannot get credentials"
+	errFailedToExtractCredentials = "failed to extract Alibaba credentials"
+	// ErrAccessKeyNotComplete is the error of not existing of AccessKeyID or AccessKeySecret
+	ErrAccessKeyNotComplete = "AccessKeyID or AccessKeySecret not existed"
+)
+
+// AlibabaCredentials represents ak/sk, stsToken(maybe) information
+type AlibabaCredentials struct {
+	AccessKeyID     string `yaml:"accessKeyId"`
+	AccessKeySecret string `yaml:"accessKeySecret"`
+	SecurityToken   string `yaml:"securityToken"`
+}
+
+// ClientEstablishmentInfo represents all the information for establishing an SDK client
+type ClientEstablishmentInfo struct {
+	AlibabaCredentials `json:",inline"`
+	Region             string `json:"region"`
+	Endpoint           string `json:"endpoint"`
+}
+
+// PrepareClient will prepare all information to establish an Alibaba Cloud resource SDK client
+func PrepareClient(ctx context.Context, mg resource.Managed, res runtime.Object, c client.Client, usage resource.Tracker, providerConfigName string) (*ClientEstablishmentInfo, error) {
+	info := &ClientEstablishmentInfo{}
+
+	if err := usage.Track(ctx, mg); err != nil {
+		return nil, errors.Wrap(err, errTrackUsage)
+	}
+
+	cred, err := GetCredentials(ctx, c, providerConfigName)
+	if err != nil {
+		return nil, errors.Wrap(err, ErrPrepareClientEstablishmentInfo)
+	}
+	info.AccessKeyID = cred.AccessKeyID
+	info.AccessKeySecret = cred.AccessKeySecret
+	info.SecurityToken = cred.SecurityToken
+
+	region, err := GetRegion(ctx, c, providerConfigName)
+	if err != nil {
+		return nil, errors.Wrap(err, ErrPrepareClientEstablishmentInfo)
+	}
+	info.Region = region
+
+	endpoint, err := GetEndpoint(res, region)
+	if err != nil {
+		return nil, err
+	}
+	info.Endpoint = endpoint
+
+	return info, nil
+}
+
+// GetEndpoint gets endpoints for all cloud resources
+func GetEndpoint(res runtime.Object, region string) (string, error) {
+	if res == nil || res.GetObjectKind() == nil {
+		return "", errors.New(errCloudResourceNotSupported)
+	}
+
+	if region == "" && res.GetObjectKind().GroupVersionKind().Kind != slb.CLBKind {
+		return "", errors.New(errRegionNotValid)
+	}
+
+	var endpoint string
+	switch res.GetObjectKind().GroupVersionKind().Kind {
+	case oss.BucketKind:
+		endpoint = fmt.Sprintf("http://oss-%s.%s", region, Domain)
+	case nas.NASFileSystemKind, nas.NASMountTargetKind:
+		endpoint = fmt.Sprintf("nas.%s.%s", region, Domain)
+	case slb.CLBKind:
+		endpoint = fmt.Sprintf("slb.%s", Domain)
+	case sls.ProjectGroupKind:
+		endpoint = fmt.Sprintf("%s.log.%s", region, Domain)
+	default:
+		return "", errors.New(errCloudResourceNotSupported)
+	}
+	return endpoint, nil
+}
+
+// GetProviderConfig gets ProviderConfig
+func GetProviderConfig(ctx context.Context, k8sClient client.Client, providerConfigName string) (*aliv1beta1.ProviderConfig, error) {
+	providerConfig := &aliv1beta1.ProviderConfig{}
+	if err := k8sClient.Get(ctx, types.NamespacedName{Name: providerConfigName}, providerConfig); err != nil {
+		return nil, errors.Wrap(err, ErrGetProviderConfig)
+	}
+	return providerConfig, nil
+}
+
+// GetCredentials gets Alibaba credentials from ProviderConfig
+func GetCredentials(ctx context.Context, client client.Client, providerConfigName string) (*AlibabaCredentials, error) {
+	pc, err := GetProviderConfig(ctx, client, providerConfigName)
+	if err != nil {
+		return nil, err
+	}
+
+	cd := pc.Spec.Credentials
+	data, err := resource.CommonCredentialExtractor(ctx, cd.Source, client, cd.CommonCredentialSelectors)
+	if err != nil {
+		return nil, errors.Wrap(err, ErrGetCredentials)
+	}
+
+	var cred AlibabaCredentials
+	if err := yaml.Unmarshal(data, &cred); err != nil {
+		return nil, errors.Wrap(err, errFailedToExtractCredentials)
+	}
+	if cred.AccessKeyID == "" || cred.AccessKeySecret == "" {
+		return nil, errors.New(ErrAccessKeyNotComplete)
+	}
+
+	return &cred, nil
+}
+
+// GetRegion gets regions from ProviderConfig
+func GetRegion(ctx context.Context, client client.Client, providerConfigName string) (string, error) {
+	pc, err := GetProviderConfig(ctx, client, providerConfigName)
+	if err != nil {
+		return "", err
+	}
+	return pc.Spec.Region, nil
+}

pkg/util/endpoint_test.go → pkg/clients/alibaba_test.go

@@ -14,19 +14,23 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package util
+package alibabacloud
 
 import (
+	"context"
 	"fmt"
 	"testing"
 
+	xpv1 "github.com/crossplane/crossplane-runtime/apis/common/v1"
 	"github.com/crossplane/crossplane-runtime/pkg/test"
 	"github.com/google/go-cmp/cmp"
 	"github.com/pkg/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
 
 	"github.com/crossplane/provider-alibaba/apis/oss/v1alpha1"
+	"github.com/crossplane/provider-alibaba/apis/v1beta1"
 )
 
 func TestGetEndpoint(t *testing.T) {
@@ -80,3 +84,53 @@ func TestGetEndpoint(t *testing.T) {
 		})
 	}
 }
+
+func TestGetCredentials(t *testing.T) {
+	ctx := context.TODO()
+	type args struct {
+		client client.Client
+		name   string
+	}
+	var pc v1beta1.ProviderConfig
+	pc.Spec.Credentials.Source = "Secret"
+	pc.Spec.Credentials.SecretRef = &xpv1.SecretKeySelector{
+		Key: "credentials",
+	}
+	pc.Spec.Credentials.SecretRef.Name = "default"
+
+	type want struct {
+		cred *AlibabaCredentials
+		err  error
+	}
+	cases := map[string]struct {
+		args args
+		want want
+	}{
+		"FailedToGetProviderConfig": {
+			args: args{
+				client: &test.MockClient{
+					MockGet: test.NewMockGetFn(nil, func(obj client.Object) error {
+						return errors.New("E1")
+					}),
+				},
+				name: "abc",
+			},
+			want: want{
+				cred: nil,
+				err:  errors.Wrap(errors.New("E1"), ErrGetProviderConfig),
+			},
+		},
+	}
+
+	for name, tc := range cases {
+		t.Run(name, func(t *testing.T) {
+			cred, err := GetCredentials(ctx, tc.args.client, tc.args.name)
+			if diff := cmp.Diff(tc.want.err, err, test.EquateErrors()); diff != "" {
+				t.Errorf("\nGetCredentials(...) -want error, +got error:\n%s\n", diff)
+			}
+			if diff := cmp.Diff(tc.want.cred, cred, test.EquateConditions()); diff != "" {
+				t.Errorf("\nGetEndpoint(...) %s\n", diff)
+			}
+		})
+	}
+}

pkg/controller/database/rdsinstance.go

@@ -33,8 +33,8 @@ import (
 
 	"github.com/crossplane/provider-alibaba/apis/database/v1alpha1"
 	aliv1beta1 "github.com/crossplane/provider-alibaba/apis/v1beta1"
+	alibabacloud "github.com/crossplane/provider-alibaba/pkg/clients"
 	"github.com/crossplane/provider-alibaba/pkg/clients/rds"
-	"github.com/crossplane/provider-alibaba/pkg/util"
 )
 
 const (
@@ -81,7 +81,7 @@ func (c *connector) Connect(ctx context.Context, mg resource.Managed) (managed.E
 		return nil, errors.New(errNotRDSInstance)
 	}
 
-	clientEstablishmentInfo, err := util.PrepareClient(ctx, mg, cr, c.client, c.usage, cr.Spec.ProviderConfigReference.Name)
+	clientEstablishmentInfo, err := alibabacloud.PrepareClient(ctx, mg, cr, c.client, c.usage, cr.Spec.ProviderConfigReference.Name)
 	if err != nil {
 		return nil, err
 	}

pkg/controller/database/rdsinstance_test.go

@@ -17,8 +17,8 @@ import (
 
 	"github.com/crossplane/provider-alibaba/apis/database/v1alpha1"
 	aliv1beta1 "github.com/crossplane/provider-alibaba/apis/v1beta1"
+	alibabacloud "github.com/crossplane/provider-alibaba/pkg/clients"
 	"github.com/crossplane/provider-alibaba/pkg/clients/rds"
-	"github.com/crossplane/provider-alibaba/pkg/util"
 )
 
 const (
@@ -94,7 +94,7 @@ func TestConnector(t *testing.T) {
 					},
 				},
 			},
-			want: errors.Wrap(errors.Wrap(errBoom, util.ErrGetProviderConfig), util.ErrPrepareClientEstablishmentInfo),
+			want: errors.Wrap(errors.Wrap(errBoom, alibabacloud.ErrGetProviderConfig), alibabacloud.ErrPrepareClientEstablishmentInfo),
 		},
 		"UnsupportedCredentialsError": {
 			reason: "An error should be returned if the selected credentials source is unsupported",
@@ -124,7 +124,7 @@ func TestConnector(t *testing.T) {
 					},
 				},
 			},
-			want: errors.Wrap(errors.Wrap(errors.Errorf(errFmtUnsupportedCredSource, "wat"), errGetCredentials), util.ErrPrepareClientEstablishmentInfo),
+			want: errors.Wrap(errors.Wrap(errors.Errorf(errFmtUnsupportedCredSource, "wat"), errGetCredentials), alibabacloud.ErrPrepareClientEstablishmentInfo),
 		},
 		"GetProviderError": {
 			reason: "Errors getting a Provider should be returned",
@@ -143,7 +143,7 @@ func TestConnector(t *testing.T) {
 					},
 				},
 			},
-			want: errors.Wrap(errors.Wrap(errBoom, util.ErrGetProviderConfig), util.ErrPrepareClientEstablishmentInfo),
+			want: errors.Wrap(errors.Wrap(errBoom, alibabacloud.ErrGetProviderConfig), alibabacloud.ErrPrepareClientEstablishmentInfo),
 		},
 		"NoConnectionSecretError": {
 			reason: "An error should be returned if no connection secret was specified",
@@ -172,7 +172,7 @@ func TestConnector(t *testing.T) {
 					},
 				},
 			},
-			want: errors.Wrap(errors.Wrap(errors.New(errExtractSecretKey), errGetCredentials), util.ErrPrepareClientEstablishmentInfo),
+			want: errors.Wrap(errors.Wrap(errors.New(errExtractSecretKey), errGetCredentials), alibabacloud.ErrPrepareClientEstablishmentInfo),
 		},
 		"GetConnectionSecretError": {
 			reason: "Errors getting a secret should be returned",
@@ -203,7 +203,7 @@ func TestConnector(t *testing.T) {
 					},
 				},
 			},
-			want: errors.Wrap(errors.Wrap(errors.Wrap(errBoom, errGetCredentialsSecret), errGetCredentials), util.ErrPrepareClientEstablishmentInfo),
+			want: errors.Wrap(errors.Wrap(errors.Wrap(errBoom, errGetCredentialsSecret), errGetCredentials), alibabacloud.ErrPrepareClientEstablishmentInfo),
 		},
 		"NewRDSClientError": {
 			reason: "Errors getting a secret should be returned",
@@ -234,7 +234,7 @@ func TestConnector(t *testing.T) {
 					},
 				},
 			},
-			want: errors.Wrap(errors.New(util.ErrAccessKeyNotComplete), util.ErrPrepareClientEstablishmentInfo),
+			want: errors.Wrap(errors.New(alibabacloud.ErrAccessKeyNotComplete), alibabacloud.ErrPrepareClientEstablishmentInfo),
 		},
 	}
 

pkg/controller/nas/mountpoint_controller.go

@@ -31,8 +31,8 @@ import (
 
 	"github.com/crossplane/provider-alibaba/apis/nas/v1alpha1"
 	aliv1beta1 "github.com/crossplane/provider-alibaba/apis/v1beta1"
+	alibabacloud "github.com/crossplane/provider-alibaba/pkg/clients"
 	nasclient "github.com/crossplane/provider-alibaba/pkg/clients/nas"
-	"github.com/crossplane/provider-alibaba/pkg/util"
 )
 
 const (
@@ -73,7 +73,7 @@ func (c *mtConnector) Connect(ctx context.Context, mg resource.Managed) (managed
 		return nil, errors.New(errNotNASMountTarget)
 	}
 
-	info, err := util.PrepareClient(ctx, mg, cr.DeepCopyObject(), c.Client, c.Usage, cr.Spec.ProviderConfigReference.Name)
+	info, err := alibabacloud.PrepareClient(ctx, mg, cr.DeepCopyObject(), c.Client, c.Usage, cr.Spec.ProviderConfigReference.Name)
 	if err != nil {
 		return nil, err
 	}

pkg/controller/nas/nas_controller.go

@@ -31,8 +31,8 @@ import (
 
 	"github.com/crossplane/provider-alibaba/apis/nas/v1alpha1"
 	aliv1beta1 "github.com/crossplane/provider-alibaba/apis/v1beta1"
+	alibabacloud "github.com/crossplane/provider-alibaba/pkg/clients"
 	nasclient "github.com/crossplane/provider-alibaba/pkg/clients/nas"
-	"github.com/crossplane/provider-alibaba/pkg/util"
 )
 
 const (
@@ -74,7 +74,7 @@ func (c *Connector) Connect(ctx context.Context, mg resource.Managed) (managed.E
 		return nil, errors.New(errNotNASFileSystem)
 	}
 
-	info, err := util.PrepareClient(ctx, mg, cr, c.Client, c.Usage, cr.Spec.ProviderConfigReference.Name)
+	info, err := alibabacloud.PrepareClient(ctx, mg, cr, c.Client, c.Usage, cr.Spec.ProviderConfigReference.Name)
 	if err != nil {
 		return nil, err
 	}

pkg/controller/oss/oss_controller.go

@@ -31,8 +31,8 @@ import (
 
 	"github.com/crossplane/provider-alibaba/apis/oss/v1alpha1"
 	aliv1beta1 "github.com/crossplane/provider-alibaba/apis/v1beta1"
+	alibabacloud "github.com/crossplane/provider-alibaba/pkg/clients"
 	ossclient "github.com/crossplane/provider-alibaba/pkg/clients/oss"
-	"github.com/crossplane/provider-alibaba/pkg/util"
 )
 
 const (
@@ -75,7 +75,7 @@ func (c *Connector) Connect(ctx context.Context, mg resource.Managed) (managed.E
 		return nil, errors.New(errNotBucket)
 	}
 
-	info, err := util.PrepareClient(ctx, mg, cr, c.Client, c.Usage, cr.Spec.ProviderConfigReference.Name)
+	info, err := alibabacloud.PrepareClient(ctx, mg, cr, c.Client, c.Usage, cr.Spec.ProviderConfigReference.Name)
 	if err != nil {
 		return nil, err
 	}

pkg/controller/slb/slb_controller.go

@@ -31,8 +31,8 @@ import (
 
 	"github.com/crossplane/provider-alibaba/apis/slb/v1alpha1"
 	aliv1beta1 "github.com/crossplane/provider-alibaba/apis/v1beta1"
+	alibabacloud "github.com/crossplane/provider-alibaba/pkg/clients"
 	slbclient "github.com/crossplane/provider-alibaba/pkg/clients/slb"
-	"github.com/crossplane/provider-alibaba/pkg/util"
 )
 
 const (
@@ -74,7 +74,7 @@ func (c *Connector) Connect(ctx context.Context, mg resource.Managed) (managed.E
 		return nil, errors.New(errNotCLB)
 	}
 
-	info, err := util.PrepareClient(ctx, mg, cr, c.Client, c.Usage, cr.Spec.ProviderConfigReference.Name)
+	info, err := alibabacloud.PrepareClient(ctx, mg, cr, c.Client, c.Usage, cr.Spec.ProviderConfigReference.Name)
 	if err != nil {
 		return nil, err
 	}