Fix linting errors

service/intel/entity.go

@@ -2,9 +2,9 @@ package intel
 
 import (
 	"context"
-	"fmt"
 	"net"
 	"sort"
+	"strconv"
 	"strings"
 	"sync"
 
@@ -433,7 +433,7 @@ func (e *Entity) getASNLists(ctx context.Context) {
 	}
 
 	e.loadAsnListOnce.Do(func() {
-		asnStr := fmt.Sprintf("%d", asn)
+		asnStr := strconv.FormatUint(uint64(asn), 10)
 		list, err := filterlists.LookupASNString(asnStr)
 		if err != nil {
 			log.Tracer(ctx).Errorf("intel: failed to get ASN blocklist for %d: %s", asn, err)

service/intel/filterlists/decoder.go

@@ -103,18 +103,19 @@ func parseHeader(r io.Reader) (compressed bool, format byte, err error) {
 	if _, err = r.Read(listHeader[:]); err != nil {
 		// if we have an error here we can safely abort because
 		// the file must be broken
-		return
+		return compressed, format, err
 	}
 
 	if listHeader[0] != dsd.LIST {
 		err = fmt.Errorf("unexpected file type: %d (%c), expected dsd list", listHeader[0], listHeader[0])
-		return
+
+		return compressed, format, err
 	}
 
 	var compression [1]byte
 	if _, err = r.Read(compression[:]); err != nil {
 		// same here, a DSDL file must have at least 2 bytes header
-		return
+		return compressed, format, err
 	}
 
 	if compression[0] == dsd.GZIP {
@@ -122,15 +123,16 @@ func parseHeader(r io.Reader) (compressed bool, format byte, err error) {
 
 		var formatSlice [1]byte
 		if _, err = r.Read(formatSlice[:]); err != nil {
-			return
+			return compressed, format, err
 		}
 
 		format = formatSlice[0]
-		return
+		return compressed, format, err
 	}
 
 	format = compression[0]
-	return // nolint:nakedret
+
+	return compressed, format, err
 }
 
 // byteReader extends an io.Reader to implement the ByteReader interface.

service/intel/geoip/lookup.go

@@ -1,7 +1,7 @@
 package geoip
 
 import (
-	"fmt"
+	"errors"
 	"net"
 
 	"github.com/oschwald/maxminddb-golang"
@@ -16,7 +16,7 @@ func getReader(ip net.IP) *maxminddb.Reader {
 func GetLocation(ip net.IP) (*Location, error) {
 	db := getReader(ip)
 	if db == nil {
-		return nil, fmt.Errorf("geoip database not available")
+		return nil, errors.New("geoip database not available")
 	}
 	record := &Location{}
 	if err := db.Lookup(ip, record); err != nil {