dynamolock: use errors.As instead of helper function

Addresses #141

_examples/cmd/lock/go.mod

@@ -1,10 +1,9 @@
 module cirello.io/dynamolock/_examples/cmd/lock
 
-go 1.12
+go 1.13
 
 require (
 	cirello.io/dynamolock v1.3.1
 	github.com/aws/aws-sdk-go v1.23.13
 	github.com/urfave/cli v1.21.0
-	golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7
 )

_examples/cmd/lock/go.sum

@@ -18,7 +18,5 @@ golang.org/x/net v0.0.0-20180911220305-26e67e76b6c3 h1:czFLhve3vsQetD6JOJ8NZZvGQ
 golang.org/x/net v0.0.0-20180911220305-26e67e76b6c3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7 h1:9zdDQZ7Thm29KFXgAX/+yaf3eVbP7djjWp/dXAppNCc=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

_examples/cmd/lock/main.go

@@ -2,6 +2,8 @@ package main
 
 import (
 	"context"
+	"errors"
+	"fmt"
 	"log"
 	"os"
 	"os/exec"
@@ -14,7 +16,6 @@ import (
 	"github.com/aws/aws-sdk-go/aws/session"
 	"github.com/aws/aws-sdk-go/service/dynamodb"
 	"github.com/urfave/cli"
-	"golang.org/x/xerrors"
 )
 
 func main() {
@@ -35,11 +36,11 @@ func main() {
 	app.Action = func(c *cli.Context) error {
 		lockName := c.Args().First()
 		if lockName == "" {
-			return xerrors.New("missing lock name")
+			return errors.New("missing lock name")
 		}
 		cmd := c.Args().Tail()
 		if len(cmd) == 0 {
-			return xerrors.New("missing command")
+			return errors.New("missing command")
 		}
 		tableName := c.String("table")
 		client, err := dialDynamoDB(tableName)
@@ -71,7 +72,7 @@ func main() {
 func dialDynamoDB(tableName string) (*dynamolock.Client, error) {
 	session, err := session.NewSession()
 	if err != nil {
-		return nil, xerrors.Errorf("cannot create AWS session: %w", err)
+		return nil, fmt.Errorf("cannot create AWS session: %w", err)
 	}
 	client, err := dynamolock.New(
 		dynamodb.New(session),
@@ -81,7 +82,7 @@ func dialDynamoDB(tableName string) (*dynamolock.Client, error) {
 		dynamolock.WithPartitionKeyName("key"),
 	)
 	if err != nil {
-		return nil, xerrors.Errorf("cannot start dynamolock client: %w", err)
+		return nil, fmt.Errorf("cannot start dynamolock client: %w", err)
 	}
 	return client, nil
 }
@@ -96,9 +97,9 @@ func createTable(client *dynamolock.Client, tableName string) error {
 	)
 	if err != nil {
 		var awsErr awserr.RequestFailure
-		isTableAlreadyCreatedError := xerrors.As(err, &awsErr) && awsErr.StatusCode() == 400 && awsErr.Message() == "Cannot create preexisting table"
+		isTableAlreadyCreatedError := errors.As(err, &awsErr) && awsErr.StatusCode() == 400 && awsErr.Message() == "Cannot create preexisting table"
 		if !isTableAlreadyCreatedError {
-			return xerrors.Errorf("cannot create dynamolock client table: %w", err)
+			return fmt.Errorf("cannot create dynamolock client table: %w", err)
 		}
 	}
 	return nil
@@ -110,7 +111,7 @@ func grabLock(client *dynamolock.Client, lockName string, wait bool) (*dynamoloc
 		if err != nil && wait {
 			continue
 		} else if err != nil {
-			return nil, xerrors.Errorf("cannot lock %s: %w", lockName, err)
+			return nil, fmt.Errorf("cannot lock %s: %w", lockName, err)
 		}
 		return lock, err
 	}
@@ -133,7 +134,7 @@ func runCommand(ctx context.Context, lock *dynamolock.Lock, releaseOnError bool,
 				log.Println("cannot release lock after failure:", lockErr)
 			}
 		}
-		return xerrors.Errorf("error: %w", err)
+		return fmt.Errorf("error: %w", err)
 	}
 	if lockErr := lock.Close(); lockErr != nil {
 		log.Println("cannot release lock after completion:", lockErr)

client.go

@@ -387,8 +387,11 @@ func (c *Client) storeLock(ctx context.Context, getLockOptions *getLockOptions)
 			item,
 			recordVersionNumber,
 			getLockOptions.sessionMonitor)
-		if err != nil && isLockNotGrantedError(err) {
-			return nil, nil
+		if err != nil {
+			var errNotGranted *LockNotGrantedError
+			if errors.As(err, &errNotGranted) {
+				return nil, nil
+			}
 		}
 		return l, err
 	}
@@ -424,8 +427,11 @@ func (c *Client) storeLock(ctx context.Context, getLockOptions *getLockOptions)
 			existingLock, newLockData, item,
 			recordVersionNumber,
 			getLockOptions.sessionMonitor)
-		if err != nil && isLockNotGrantedError(err) {
-			return nil, nil
+		if err != nil {
+			var errNotGranted *LockNotGrantedError
+			if errors.As(err, &errNotGranted) {
+				return nil, nil
+			}
 		}
 		return l, err
 	} else if getLockOptions.lockTryingToBeAcquired.recordVersionNumber != existingLock.recordVersionNumber {

client_bugs_test.go

@@ -17,14 +17,14 @@ limitations under the License.
 package dynamolock_test
 
 import (
+	"errors"
 	"sync"
 	"testing"
 	"time"
 
 	"cirello.io/dynamolock"
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/dynamodb"
-	"golang.org/x/xerrors"
 )
 
 func TestIssue56(t *testing.T) {
@@ -79,7 +79,7 @@ func TestIssue56(t *testing.T) {
 					return
 				default:
 					var errTimeout *dynamolock.TimeoutError
-					if !xerrors.As(err, &errTimeout) {
+					if !errors.As(err, &errTimeout) {
 						t.Error("unexpected error:", err)
 						return
 					}

client_heartbeat.go

@@ -18,6 +18,7 @@ package dynamolock
 
 import (
 	"context"
+	"errors"
 	"time"
 
 	"github.com/aws/aws-sdk-go/aws"
@@ -123,7 +124,8 @@ func (c *Client) sendHeartbeat(ctx context.Context, options *sendHeartbeatOption
 	_, err := c.dynamoDB.UpdateItemWithContext(ctx, updateItemInput)
 	if err != nil {
 		err := parseDynamoDBError(err, "already acquired lock, stopping heartbeats")
-		if isLockNotGrantedError(err) {
+		var errNotGranted *LockNotGrantedError
+		if errors.As(err, &errNotGranted) {
 			c.locks.Delete(lockItem.uniqueIdentifier())
 		}
 		return err

errors.go

@@ -54,11 +54,6 @@ func (e *LockNotGrantedError) Unwrap() error {
 	return e.cause
 }
 
-func isLockNotGrantedError(err error) bool {
-	_, ok := err.(*LockNotGrantedError)
-	return ok
-}
-
 func parseDynamoDBError(err error, msg string) error {
 	if aerr, ok := err.(awserr.Error); ok {
 		switch aerr.Code() {

errors_internal_test.go

@@ -23,18 +23,18 @@ import (
 
 	"github.com/aws/aws-sdk-go/aws/awserr"
 	"github.com/aws/aws-sdk-go/service/dynamodb"
-	"golang.org/x/xerrors"
 )
 
 func TestLockNotGrantedError(t *testing.T) {
 	t.Parallel()
 	t.Run("simply not granted", func(t *testing.T) {
+		var errNotGranted *LockNotGrantedError
 		notGranted := &LockNotGrantedError{msg: "not granted"}
-		if !isLockNotGrantedError(notGranted) {
+		if !errors.As(notGranted, &errNotGranted) {
 			t.Error("mismatched error type check: ", notGranted)
 		}
 		vanilla := errors.New("vanilla error")
-		if isLockNotGrantedError(vanilla) {
+		if errors.As(vanilla, &errNotGranted) {
 			t.Error("mismatched error type check: ", vanilla)
 		}
 	})
@@ -46,7 +46,7 @@ func TestLockNotGrantedError(t *testing.T) {
 		}
 		t.Log(notGranted.Error())
 		var errTimeout *TimeoutError
-		if !xerrors.As(notGranted, &errTimeout) {
+		if !errors.As(notGranted, &errTimeout) {
 			t.Fatal("expected to find TimeoutError")
 		}
 		if errTimeout.Age != expectedAge {

go.mod

@@ -1,8 +1,5 @@
 module cirello.io/dynamolock
 
-go 1.12
+go 1.13
 
-require (
-	github.com/aws/aws-sdk-go v1.38.7
-	golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898
-)
+require github.com/aws/aws-sdk-go v1.38.7

go.sum

@@ -1,92 +1,28 @@
-github.com/aws/aws-sdk-go v1.31.12 h1:SxRRGyhlCagI0DYkhOg+FgdXGXzRTE3vEX/gsgFaiKQ=
-github.com/aws/aws-sdk-go v1.31.12/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.32.1 h1:0dy5DkMKNPH9mLWveAWA9ZTiKIEEvJJA6fbe0eCs19k=
-github.com/aws/aws-sdk-go v1.32.1/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.32.6 h1:HoswAabUWgnrUF7X/9dr4WRgrr8DyscxXvTDm7Qw/5c=
-github.com/aws/aws-sdk-go v1.32.6/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.33.1 h1:yz9XmNzPshz/lhfAZvLfMnIS9HPo8+boGRcWqDVX+T0=
-github.com/aws/aws-sdk-go v1.33.1/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.33.5 h1:p2fr1ryvNTU6avUWLI+/H7FGv0TBIjzVM5WDgXBBv4U=
-github.com/aws/aws-sdk-go v1.33.5/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.33.7 h1:vOozL5hmWHHriRviVTQnUwz8l05RS0rehmEFymI+/x8=
-github.com/aws/aws-sdk-go v1.33.7/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.33.12 h1:eydMoSwfrSTD9PWKUJOiDL7+/UwDW8AjInUGVE5Llh4=
-github.com/aws/aws-sdk-go v1.33.12/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.33.17 h1:vngPRchZs603qLtJH7lh2pBCDqiFxA9+9nDWJ5WYJ5A=
-github.com/aws/aws-sdk-go v1.33.17/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.34.0 h1:brux2dRrlwCF5JhTL7MUT3WUwo9zfDHZZp3+g3Mvlmo=
-github.com/aws/aws-sdk-go v1.34.0/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.34.5 h1:FwubVVX9u+kW9qDCjVzyWOdsL+W5wPq683wMk2R2GXk=
-github.com/aws/aws-sdk-go v1.34.5/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.34.9 h1:cUGBW9CVdi0mS7K1hDzxIqTpfeWhpoQiguq81M1tjK0=
-github.com/aws/aws-sdk-go v1.34.9/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.34.13 h1:wwNWSUh4FGJxXVOVVNj2lWI8wTe5hK8sGWlK7ziEcgg=
-github.com/aws/aws-sdk-go v1.34.13/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.34.18 h1:Mo/Clq3u1dQFzpg8YQqBii8m+Vl3fWIfHi6kXs5wpuM=
-github.com/aws/aws-sdk-go v1.34.18/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.34.22 h1:7V2sKilVVgHqdjbW+O/xaVWYfnmuLwZdF/+6JuUh6Cw=
-github.com/aws/aws-sdk-go v1.34.22/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.34.27 h1:qBqccUrlz43Zermh0U1O502bHYZsgMlBm+LUVabzBPA=
-github.com/aws/aws-sdk-go v1.34.27/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.34.32 h1:EHjowHEGXyLHWhcO7M7AVA+oA2c8aLE9WfRvqHwxd3A=
-github.com/aws/aws-sdk-go v1.34.32/go.mod h1:H7NKnBqNVzoTJpGfLrQkkD+ytBA93eiDYi/+8rV9s48=
-github.com/aws/aws-sdk-go v1.35.2 h1:qK+noh6b9KW+5CP1NmmWsQCUbnzucSGrjHEs69MEl6A=
-github.com/aws/aws-sdk-go v1.35.2/go.mod h1:H7NKnBqNVzoTJpGfLrQkkD+ytBA93eiDYi/+8rV9s48=
-github.com/aws/aws-sdk-go v1.35.7/go.mod h1:tlPOdRjfxPBpNIwqDj61rmsnA85v9jc0Ps9+muhnW+k=
-github.com/aws/aws-sdk-go v1.35.9/go.mod h1:tlPOdRjfxPBpNIwqDj61rmsnA85v9jc0Ps9+muhnW+k=
-github.com/aws/aws-sdk-go v1.35.14/go.mod h1:tlPOdRjfxPBpNIwqDj61rmsnA85v9jc0Ps9+muhnW+k=
-github.com/aws/aws-sdk-go v1.35.19/go.mod h1:tlPOdRjfxPBpNIwqDj61rmsnA85v9jc0Ps9+muhnW+k=
-github.com/aws/aws-sdk-go v1.35.23/go.mod h1:tlPOdRjfxPBpNIwqDj61rmsnA85v9jc0Ps9+muhnW+k=
-github.com/aws/aws-sdk-go v1.35.28/go.mod h1:tlPOdRjfxPBpNIwqDj61rmsnA85v9jc0Ps9+muhnW+k=
-github.com/aws/aws-sdk-go v1.35.33/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.35.35/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.36.2/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.36.7/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.36.12/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.36.15/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.36.19/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.36.23/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.36.28/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.36.31/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.37.1/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.37.6/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.37.10/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.37.15/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.37.25/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.37.30/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/aws/aws-sdk-go v1.38.1/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
+github.com/aws/aws-sdk-go v1.38.7 h1:uOu2IrTiNhcSNAjBmA21t48lTx5mgGdcFKamDjXMscA=
 github.com/aws/aws-sdk-go v1.38.7/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
-github.com/jmespath/go-jmespath v0.3.0 h1:OS12ieG61fsCg5+qLJ+SsW9NicxNkg3b25OyT2yCeUc=
-github.com/jmespath/go-jmespath v0.3.0/go.mod h1:9QtRXoHjLGCJ5IBSaohpXITPlowMeeYCZ7fLUTSywik=
 github.com/jmespath/go-jmespath v0.4.0 h1:BEgLn5cpjn8UN1mAw4NjwDrS35OdebyEtFe+9YPoQUg=
 github.com/jmespath/go-jmespath v0.4.0/go.mod h1:T8mJZnbsbmF+m6zOOFylbeCJqk5+pHWvzYPziyZiYoo=
+github.com/jmespath/go-jmespath/internal/testify v1.5.1 h1:shLQSRRSCCPj3f2gpwzGwWFoC7ycTf1rcQZHOlsJ6N8=
 github.com/jmespath/go-jmespath/internal/testify v1.5.1/go.mod h1:L3OGu8Wl2/fWfCI6z80xFu9LTZmf1ZRjMHUOPmWr69U=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
-github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20200202094626-16171245cfb2 h1:CCH4IOTTfewWjGOlSp+zGcjutRKlBEZQ6wTn8ozI/nI=
-golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20201110031124-69a78807bb2b h1:uwuIcX0g4Yl1NC5XAz37xsr2lTtcqevgzYNVt49waME=
 golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898 h1:/atklqdjdhuosWIl6AIbOeHJjicWYPqR9bpxqxYG2pA=
-golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
-gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=