use Go standard errors package

Signed-off-by: Matthieu MOREL <matthieu.morel35@gmail.com>

.golangci.yml

@@ -37,12 +37,17 @@ issues:
     - path: tsdb/
       linters:
         - errorlint
-    - path: util/
+    - path: tsdb/
+      text: "import 'github.com/pkg/errors' is not allowed"
       linters:
-        - errorlint
+        - depguard
     - path: web/
       linters:
         - errorlint
+    - path: web/
+      text: "import 'github.com/pkg/errors' is not allowed"
+      linters:
+        - depguard
     - linters:
         - godot
       source: "^// ==="
@@ -62,6 +67,8 @@ linters-settings:
           desc: "Use corresponding 'os' or 'io' functions instead."
         - pkg: "regexp"
           desc: "Use github.com/grafana/regexp instead of regexp"
+        - pkg: "github.com/pkg/errors"
+          desc: "Use 'errors' or 'fmt' instead of github.com/pkg/errors"
   errcheck:
     exclude-functions:
       # Don't flag lines such as "io.Copy(io.Discard, resp.Body)".

discovery/ionos/ionos.go

@@ -14,10 +14,10 @@
 package ionos
 
 import (
+	"errors"
 	"time"
 
 	"github.com/go-kit/log"
-	"github.com/pkg/errors"
 	"github.com/prometheus/common/config"
 	"github.com/prometheus/common/model"
 

model/textparse/protobufparse.go

@@ -16,6 +16,7 @@ package textparse
 import (
 	"bytes"
 	"encoding/binary"
+	"errors"
 	"fmt"
 	"io"
 	"math"
@@ -24,7 +25,6 @@ import (
 
 	"github.com/gogo/protobuf/proto"
 	"github.com/gogo/protobuf/types"
-	"github.com/pkg/errors"
 	"github.com/prometheus/common/model"
 
 	"github.com/prometheus/prometheus/model/exemplar"
@@ -396,10 +396,10 @@ func (p *ProtobufParser) Next() (Entry, error) {
 		// into metricBytes and validate only name, help, and type for now.
 		name := p.mf.GetName()
 		if !model.IsValidMetricName(model.LabelValue(name)) {
-			return EntryInvalid, errors.Errorf("invalid metric name: %s", name)
+			return EntryInvalid, fmt.Errorf("invalid metric name: %s", name)
 		}
 		if help := p.mf.GetHelp(); !utf8.ValidString(help) {
-			return EntryInvalid, errors.Errorf("invalid help for metric %q: %s", name, help)
+			return EntryInvalid, fmt.Errorf("invalid help for metric %q: %s", name, help)
 		}
 		switch p.mf.GetType() {
 		case dto.MetricType_COUNTER,
@@ -410,7 +410,7 @@ func (p *ProtobufParser) Next() (Entry, error) {
 			dto.MetricType_UNTYPED:
 			// All good.
 		default:
-			return EntryInvalid, errors.Errorf("unknown metric type for metric %q: %s", name, p.mf.GetType())
+			return EntryInvalid, fmt.Errorf("unknown metric type for metric %q: %s", name, p.mf.GetType())
 		}
 		p.metricBytes.Reset()
 		p.metricBytes.WriteString(name)
@@ -463,7 +463,7 @@ func (p *ProtobufParser) Next() (Entry, error) {
 			return EntryInvalid, err
 		}
 	default:
-		return EntryInvalid, errors.Errorf("invalid protobuf parsing state: %d", p.state)
+		return EntryInvalid, fmt.Errorf("invalid protobuf parsing state: %d", p.state)
 	}
 	return p.state, nil
 }
@@ -476,13 +476,13 @@ func (p *ProtobufParser) updateMetricBytes() error {
 		b.WriteByte(model.SeparatorByte)
 		n := lp.GetName()
 		if !model.LabelName(n).IsValid() {
-			return errors.Errorf("invalid label name: %s", n)
+			return fmt.Errorf("invalid label name: %s", n)
 		}
 		b.WriteString(n)
 		b.WriteByte(model.SeparatorByte)
 		v := lp.GetValue()
 		if !utf8.ValidString(v) {
-			return errors.Errorf("invalid label value: %s", v)
+			return fmt.Errorf("invalid label value: %s", v)
 		}
 		b.WriteString(v)
 	}
@@ -557,7 +557,7 @@ func readDelimited(b []byte, mf *dto.MetricFamily) (n int, err error) {
 	}
 	totalLength := varIntLength + int(messageLength)
 	if totalLength > len(b) {
-		return 0, errors.Errorf("protobufparse: insufficient length of buffer, expected at least %d bytes, got %d bytes", totalLength, len(b))
+		return 0, fmt.Errorf("protobufparse: insufficient length of buffer, expected at least %d bytes, got %d bytes", totalLength, len(b))
 	}
 	mf.Reset()
 	return totalLength, mf.Unmarshal(b[varIntLength:totalLength])

scrape/manager.go

@@ -14,6 +14,7 @@
 package scrape
 
 import (
+	"errors"
 	"fmt"
 	"hash/fnv"
 	"reflect"
@@ -22,7 +23,6 @@ import (
 
 	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
-	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	config_util "github.com/prometheus/common/config"
 	"github.com/prometheus/common/model"

scrape/target.go

@@ -14,6 +14,7 @@
 package scrape
 
 import (
+	"errors"
 	"fmt"
 	"hash/fnv"
 	"net"
@@ -22,7 +23,6 @@ import (
 	"sync"
 	"time"
 
-	"github.com/pkg/errors"
 	"github.com/prometheus/common/model"
 
 	"github.com/prometheus/prometheus/config"
@@ -289,12 +289,12 @@ func (t *Target) intervalAndTimeout(defaultInterval, defaultDuration time.Durati
 	intervalLabel := t.labels.Get(model.ScrapeIntervalLabel)
 	interval, err := model.ParseDuration(intervalLabel)
 	if err != nil {
-		return defaultInterval, defaultDuration, errors.Errorf("Error parsing interval label %q: %v", intervalLabel, err)
+		return defaultInterval, defaultDuration, fmt.Errorf("Error parsing interval label %q: %w", intervalLabel, err)
 	}
 	timeoutLabel := t.labels.Get(model.ScrapeTimeoutLabel)
 	timeout, err := model.ParseDuration(timeoutLabel)
 	if err != nil {
-		return defaultInterval, defaultDuration, errors.Errorf("Error parsing timeout label %q: %v", timeoutLabel, err)
+		return defaultInterval, defaultDuration, fmt.Errorf("Error parsing timeout label %q: %w", timeoutLabel, err)
 	}
 
 	return time.Duration(interval), time.Duration(timeout), nil
@@ -444,7 +444,7 @@ func PopulateLabels(lb *labels.Builder, cfg *config.ScrapeConfig, noDefaultPort
 		case "https":
 			addr += ":443"
 		default:
-			return labels.EmptyLabels(), labels.EmptyLabels(), errors.Errorf("invalid scheme: %q", cfg.Scheme)
+			return labels.EmptyLabels(), labels.EmptyLabels(), fmt.Errorf("invalid scheme: %q", cfg.Scheme)
 		}
 		lb.Set(model.AddressLabel, addr)
 	}
@@ -471,7 +471,7 @@ func PopulateLabels(lb *labels.Builder, cfg *config.ScrapeConfig, noDefaultPort
 	interval := lb.Get(model.ScrapeIntervalLabel)
 	intervalDuration, err := model.ParseDuration(interval)
 	if err != nil {
-		return labels.EmptyLabels(), labels.EmptyLabels(), errors.Errorf("error parsing scrape interval: %v", err)
+		return labels.EmptyLabels(), labels.EmptyLabels(), fmt.Errorf("error parsing scrape interval: %w", err)
 	}
 	if time.Duration(intervalDuration) == 0 {
 		return labels.EmptyLabels(), labels.EmptyLabels(), errors.New("scrape interval cannot be 0")
@@ -480,14 +480,14 @@ func PopulateLabels(lb *labels.Builder, cfg *config.ScrapeConfig, noDefaultPort
 	timeout := lb.Get(model.ScrapeTimeoutLabel)
 	timeoutDuration, err := model.ParseDuration(timeout)
 	if err != nil {
-		return labels.EmptyLabels(), labels.EmptyLabels(), errors.Errorf("error parsing scrape timeout: %v", err)
+		return labels.EmptyLabels(), labels.EmptyLabels(), fmt.Errorf("error parsing scrape timeout: %w", err)
 	}
 	if time.Duration(timeoutDuration) == 0 {
 		return labels.EmptyLabels(), labels.EmptyLabels(), errors.New("scrape timeout cannot be 0")
 	}
 
 	if timeoutDuration > intervalDuration {
-		return labels.EmptyLabels(), labels.EmptyLabels(), errors.Errorf("scrape timeout cannot be greater than scrape interval (%q > %q)", timeout, interval)
+		return labels.EmptyLabels(), labels.EmptyLabels(), fmt.Errorf("scrape timeout cannot be greater than scrape interval (%q > %q)", timeout, interval)
 	}
 
 	// Meta labels are deleted after relabelling. Other internal labels propagate to
@@ -507,7 +507,7 @@ func PopulateLabels(lb *labels.Builder, cfg *config.ScrapeConfig, noDefaultPort
 	err = res.Validate(func(l labels.Label) error {
 		// Check label values are valid, drop the target if not.
 		if !model.LabelValue(l.Value).IsValid() {
-			return errors.Errorf("invalid label value for %q: %q", l.Name, l.Value)
+			return fmt.Errorf("invalid label value for %q: %q", l.Name, l.Value)
 		}
 		return nil
 	})
@@ -536,7 +536,7 @@ func TargetsFromGroup(tg *targetgroup.Group, cfg *config.ScrapeConfig, noDefault
 
 		lset, origLabels, err := PopulateLabels(lb, cfg, noDefaultPort)
 		if err != nil {
-			failures = append(failures, errors.Wrapf(err, "instance %d in group %s", i, tg))
+			failures = append(failures, fmt.Errorf("instance %d in group %s: %w", i, tg, err))
 		}
 		if !lset.IsEmpty() || !origLabels.IsEmpty() {
 			targets = append(targets, NewTarget(lset, origLabels, cfg.Params))

storage/fanout_test.go

@@ -15,9 +15,9 @@ package storage_test
 
 import (
 	"context"
+	"errors"
 	"testing"
 
-	"github.com/pkg/errors"
 	"github.com/prometheus/common/model"
 	"github.com/stretchr/testify/require"
 

util/annotations/annotations.go

@@ -81,8 +81,8 @@ func (a Annotations) AsStrings(query string, maxAnnos int) []string {
 		if maxAnnos > 0 && len(arr) >= maxAnnos {
 			break
 		}
-		anErr, ok := err.(annoErr)
-		if ok {
+		var anErr annoErr
+		if errors.As(err, &anErr) {
 			anErr.Query = query
 			err = anErr
 		}