Update go-ucfg (#3045)

- Update go-ucfg
- add support for parsing lists/dictionaries from environment variables and via
  `-E` flag

CHANGELOG.asciidoc

@@ -54,6 +54,8 @@ https://github.com/elastic/beats/compare/v5.0.1...master[Check the HEAD diff]
 *Affecting all Beats*
 - Add add_cloud_metadata processor for collecting cloud provider metadata. {pull}2728[2728]
 - Added decode_json_fields processor for decoding fields containing JSON strings. {pull}2605[2605]
+- Add support for passing list and dictionary settings via -E flag.
+- Support for parsing list and dictionary setting from environment variables.
 
 *Metricbeat*
 

glide.yaml

@@ -81,7 +81,7 @@ import:
 - package: github.com/dustin/go-humanize
   version: 499693e27ee0d14ffab67c31ad065fdb3d34ea75
 - package: github.com/elastic/go-ucfg
-  version: v0.3.7
+  version: v0.4.2
 - package: github.com/armon/go-socks5
   version: 3a873e99f5400ad7706e464e905ffcc94b3ff247
 - package: github.com/pkg/errors

heartbeat/monitors/util.go

@@ -281,22 +281,14 @@ func (f funcTask) annotated(start time.Time, typ string) TaskRunner {
 	return annotated(start, typ, f.run)
 }
 
-func (p *PingMode) Unpack(v interface{}) error {
-	var fail = errors.New("expecting 'any' or 'all'")
-	s, ok := v.(string)
-	if !ok {
-		return fail
-	}
-
+func (p *PingMode) Unpack(s string) error {
 	switch s {
 	case "all":
 		*p = PingAll
 	case "any":
 		*p = PingAny
-	default:
-		return fail
 	}
-	return nil
+	return errors.New("expecting 'any' or 'all'")
 }
 
 func annotated(start time.Time, typ string, fn func() (common.MapStr, []TaskRunner, error)) TaskRunner {

heartbeat/scheduler/schedule/cron/cron.go

@@ -1,7 +1,6 @@
 package cron
 
 import (
-	"errors"
 	"time"
 
 	"github.com/gorhill/cronexpr"
@@ -27,17 +26,10 @@ func (s *Schedule) Next(t time.Time) time.Time {
 	return expr.Next(t)
 }
 
-func (s *Schedule) Unpack(in interface{}) error {
-	str, ok := in.(string)
-	if !ok {
-		return errors.New("scheduler string required")
-	}
-
+func (s *Schedule) Unpack(str string) error {
 	tmp, err := Parse(str)
-	if err != nil {
-		return err
+	if err == nil {
+		*s = *tmp
 	}
-
-	*s = *tmp
-	return nil
+	return err
 }

heartbeat/scheduler/schedule/schedule.go

@@ -1,7 +1,6 @@
 package schedule
 
 import (
-	"errors"
 	"strings"
 	"time"
 
@@ -43,17 +42,10 @@ func (s intervalScheduler) Next(t time.Time) time.Time {
 	return t.Add(s.interval)
 }
 
-func (s *Schedule) Unpack(in interface{}) error {
-	str, ok := in.(string)
-	if !ok {
-		return errors.New("scheduler string required")
-	}
-
+func (s *Schedule) Unpack(str string) error {
 	tmp, err := Parse(str)
-	if err != nil {
-		return err
+	if err == nil {
+		*s = *tmp
 	}
-
-	*s = *tmp
-	return nil
+	return err
 }

libbeat/outputs/outil/select_test.go

@@ -1,6 +1,7 @@
 package outil
 
 import (
+	"strings"
 	"testing"
 
 	"github.com/elastic/beats/libbeat/common"
@@ -49,24 +50,24 @@ func TestSelector(t *testing.T) {
 		{
 			"missing format string key with default in rule",
 			`keys:
-        - key: '%{[key]}'
-          default: value`,
+			        - key: '%{[key]}'
+			          default: value`,
 			common.MapStr{},
 			"value",
 		},
 		{
 			"empty format string key with default in rule",
 			`keys:
-        - key: '%{[key]}'
-          default: value`,
+						        - key: '%{[key]}'
+						          default: value`,
 			common.MapStr{"key": ""},
 			"value",
 		},
 		{
 			"missing format string key with constant in next rule",
 			`keys:
-        - key: '%{[key]}'
-        - key: value`,
+						        - key: '%{[key]}'
+						        - key: value`,
 			common.MapStr{},
 			"value",
 		},
@@ -79,83 +80,83 @@ func TestSelector(t *testing.T) {
 		{
 			"apply mapping",
 			`keys:
-       - key: '%{[key]}'
-         mappings:
-           v: value`,
+						       - key: '%{[key]}'
+						         mappings:
+						           v: value`,
 			common.MapStr{"key": "v"},
 			"value",
 		},
 		{
 			"apply mapping with default on empty key",
 			`keys:
-       - key: '%{[key]}'
-         default: value
-         mappings:
-           v: 'v'`,
+						       - key: '%{[key]}'
+						         default: value
+						         mappings:
+						           v: 'v'`,
 			common.MapStr{"key": ""},
 			"value",
 		},
 		{
 			"apply mapping with default on empty lookup",
 			`keys:
-       - key: '%{[key]}'
-         default: value
-         mappings:
-           v: ''`,
+			       - key: '%{[key]}'
+			         default: value
+			         mappings:
+			           v: ''`,
 			common.MapStr{"key": "v"},
 			"value",
 		},
 		{
 			"apply mapping without match",
 			`keys:
-       - key: '%{[key]}'
-         mappings:
-           v: ''
-       - key: value`,
+						       - key: '%{[key]}'
+						         mappings:
+						           v: ''
+						       - key: value`,
 			common.MapStr{"key": "x"},
 			"value",
 		},
 		{
 			"mapping with constant key",
 			`keys:
-       - key: k
-         mappings:
-           k: value`,
+						       - key: k
+						         mappings:
+						           k: value`,
 			common.MapStr{},
 			"value",
 		},
 		{
 			"mapping with missing constant key",
 			`keys:
-       - key: unknown
-         mappings: {k: wrong}
-       - key: value`,
+						       - key: unknown
+						         mappings: {k: wrong}
+						       - key: value`,
 			common.MapStr{},
 			"value",
 		},
 		{
 			"mapping with missing constant key, but default",
 			`keys:
-       - key: unknown
-         default: value
-         mappings: {k: wrong}`,
+						       - key: unknown
+						         default: value
+						         mappings: {k: wrong}`,
 			common.MapStr{},
 			"value",
 		},
 		{
 			"matching condition",
 			`keys:
-       - key: value
-         when.equals.test: test`,
+						       - key: value
+						         when.equals.test: test`,
 			common.MapStr{"test": "test"},
 			"value",
 		},
 		{
 			"failing condition",
 			`keys:
-       - key: wrong
-         when.equals.test: test
-       - key: value`,
+						       - key: wrong
+						         when.equals.test: test
+						       - key: value`,
 			common.MapStr{"test": "x"},
 			"value",
 		},
@@ -164,9 +165,10 @@ func TestSelector(t *testing.T) {
 	for i, test := range tests {
 		t.Logf("run (%v): %v", i, test.title)
 
-		cfg, err := common.NewConfigWithYAML([]byte(test.config), "test")
+		yaml := strings.Replace(test.config, "\t", "  ", -1)
+		cfg, err := common.NewConfigWithYAML([]byte(yaml), "test")
 		if err != nil {
-			t.Error(err)
+			t.Errorf("YAML parse error: %v\n%v", err, yaml)
 			continue
 		}
 

libbeat/outputs/tls.go

@@ -269,12 +269,7 @@ func loadCertificateAuthorities(CAs []string) (*x509.CertPool, []error) {
 	return roots, errors
 }
 
-func (cs *tlsCipherSuite) Unpack(in interface{}) error {
-	s, ok := in.(string)
-	if !ok {
-		return fmt.Errorf("tls cipher suite must be an identifier")
-	}
-
+func (cs *tlsCipherSuite) Unpack(s string) error {
 	suite, found := tlsCipherSuites[s]
 	if !found {
 		return fmt.Errorf("invalid tls cipher suite '%v'", s)
@@ -284,18 +279,12 @@ func (cs *tlsCipherSuite) Unpack(in interface{}) error {
 	return nil
 }
 
-func (ct *tlsCurveType) Unpack(in interface{}) error {
-	s, ok := in.(string)
-	if !ok {
-		return fmt.Errorf("tls curve type must be an identifier")
-	}
-
+func (ct *tlsCurveType) Unpack(s string) error {
 	t, found := tlsCurveTypes[s]
 	if !found {
 		return fmt.Errorf("invalid tls curve type '%v'", s)
 	}
 
 	*ct = t
 	return nil
-
 }

libbeat/outputs/transport/tls.go

@@ -234,12 +234,7 @@ func (v TLSVersion) String() string {
 	return "unknown"
 }
 
-func (v *TLSVersion) Unpack(in interface{}) error {
-	s, ok := in.(string)
-	if !ok {
-		return fmt.Errorf("tls version must be an identifier")
-	}
-
+func (v *TLSVersion) Unpack(s string) error {
 	version, found := tlsProtocolVersions[s]
 	if !found {
 		return fmt.Errorf("invalid tls version '%v'", s)

packetbeat/protos/cassandra/internal/gocql/marshal.go

@@ -12,9 +12,10 @@ import (
 	"time"
 
 	"errors"
+	"strings"
+
 	"github.com/elastic/beats/libbeat/logp"
 	"gopkg.in/inf.v0"
-	"strings"
 )
 
 // TypeInfo describes a Cassandra specific data type.
@@ -530,19 +531,12 @@ func FrameOpFromString(s string) (FrameOp, error) {
 	return op, nil
 }
 
-func (f *FrameOp) Unpack(in interface{}) error {
-	s, ok := in.(string)
-	if !ok {
-		return errors.New("expected string")
-	}
-
+func (f *FrameOp) Unpack(s string) error {
 	op, err := FrameOpFromString(s)
-	if err != nil {
-		return err
+	if err == nil {
+		*f = op
 	}
-
-	*f = op
-	return nil
+	return err
 }
 
 const (