chore: pkg import only once

pkg/configs/db/postgres/postgres.go

@@ -16,8 +16,7 @@ import (
 	"github.com/golang-migrate/migrate/v4"
 	_ "github.com/golang-migrate/migrate/v4/database/postgres" // Import the postgres migrations driver
 	_ "github.com/golang-migrate/migrate/v4/source/file"       // Import the postgres migrations driver
-	"github.com/lib/pq"
-	_ "github.com/lib/pq" // Import the postgres sql driver
+	"github.com/lib/pq"                                        // Import the postgres sql driver
 	"github.com/pkg/errors"
 )
 

pkg/cortexpb/compat_test.go

@@ -2,7 +2,6 @@ package cortexpb
 
 import (
 	"encoding/json"
-	stdlibjson "encoding/json"
 	"math"
 	"testing"
 	"unsafe"
@@ -21,7 +20,7 @@ func TestJsoniterMarshalForSample(t *testing.T) {
 }
 
 func TestStdlibJsonMarshalForSample(t *testing.T) {
-	testMarshalling(t, stdlibjson.Marshal, "json: error calling MarshalJSON for type cortexpb.Sample: test sample")
+	testMarshalling(t, json.Marshal, "json: error calling MarshalJSON for type cortexpb.Sample: test sample")
 }
 
 func testMarshalling(t *testing.T, marshalFn func(v interface{}) ([]byte, error), expectedError string) {

pkg/querier/batch/batch.go

@@ -3,7 +3,6 @@ package batch
 import (
 	"github.com/cortexproject/cortex/pkg/chunk"
 	"github.com/cortexproject/cortex/pkg/chunk/encoding"
-	promchunk "github.com/cortexproject/cortex/pkg/chunk/encoding"
 	"github.com/cortexproject/cortex/pkg/querier/iterators"
 
 	"github.com/prometheus/common/model"
@@ -48,7 +47,7 @@ type iterator interface {
 
 	// Batch returns the current batch.  Must only be called after Seek or Next
 	// have returned true.
-	Batch() promchunk.Batch
+	Batch() encoding.Batch
 
 	Err() error
 }
@@ -74,7 +73,7 @@ func NewGenericChunkMergeIterator(chunks []GenericChunk) chunkenc.Iterator {
 // call to Next; on calls to Seek, resets batch size to 1.
 type iteratorAdapter struct {
 	batchSize  int
-	curr       promchunk.Batch
+	curr       encoding.Batch
 	underlying iterator
 }
 
@@ -130,8 +129,8 @@ func (a *iteratorAdapter) Next() bool {
 	for a.curr.Index >= a.curr.Length && a.underlying.Next(a.batchSize) {
 		a.curr = a.underlying.Batch()
 		a.batchSize = a.batchSize * 2
-		if a.batchSize > promchunk.BatchSize {
-			a.batchSize = promchunk.BatchSize
+		if a.batchSize > encoding.BatchSize {
+			a.batchSize = encoding.BatchSize
 		}
 	}
 	return a.curr.Index < a.curr.Length

pkg/querier/worker/frontend_processor.go

@@ -14,7 +14,6 @@ import (
 	"google.golang.org/grpc"
 
 	"github.com/cortexproject/cortex/pkg/frontend/v1/frontendv1pb"
-	"github.com/cortexproject/cortex/pkg/querier/stats"
 	querier_stats "github.com/cortexproject/cortex/pkg/querier/stats"
 	"github.com/cortexproject/cortex/pkg/util/backoff"
 	util_log "github.com/cortexproject/cortex/pkg/util/log"
@@ -101,7 +100,7 @@ func (fp *frontendProcessor) process(c frontendv1pb.Frontend_ProcessClient) erro
 			// and cancel the query.  We don't actually handle queries in parallel
 			// here, as we're running in lock step with the server - each Recv is
 			// paired with a Send.
-			go fp.runRequest(ctx, request.HttpRequest, request.StatsEnabled, func(response *httpgrpc.HTTPResponse, stats *stats.QueryStats) error {
+			go fp.runRequest(ctx, request.HttpRequest, request.StatsEnabled, func(response *httpgrpc.HTTPResponse, stats *querier_stats.QueryStats) error {
 				return c.Send(&frontendv1pb.ClientToFrontend{
 					HttpResponse: response,
 					Stats:        stats,
@@ -120,7 +119,7 @@ func (fp *frontendProcessor) process(c frontendv1pb.Frontend_ProcessClient) erro
 	}
 }
 
-func (fp *frontendProcessor) runRequest(ctx context.Context, request *httpgrpc.HTTPRequest, statsEnabled bool, sendHTTPResponse func(response *httpgrpc.HTTPResponse, stats *stats.QueryStats) error) {
+func (fp *frontendProcessor) runRequest(ctx context.Context, request *httpgrpc.HTTPRequest, statsEnabled bool, sendHTTPResponse func(response *httpgrpc.HTTPResponse, stats *querier_stats.QueryStats) error) {
 	var stats *querier_stats.QueryStats
 	if statsEnabled {
 		stats, ctx = querier_stats.ContextWithEmptyStats(ctx)

pkg/ring/lifecycler.go

@@ -13,7 +13,6 @@ import (
 	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
 	"github.com/pkg/errors"
-	perrors "github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	"go.uber.org/atomic"
 
@@ -419,7 +418,7 @@ func (i *Lifecycler) loop(ctx context.Context) error {
 	// First, see if we exist in the cluster, update our state to match if we do,
 	// and add ourselves (without tokens) if we don't.
 	if err := i.initRing(context.Background()); err != nil {
-		return perrors.Wrapf(err, "failed to join the ring %s", i.RingName)
+		return errors.Wrapf(err, "failed to join the ring %s", i.RingName)
 	}
 
 	// We do various period tasks
@@ -464,14 +463,14 @@ func (i *Lifecycler) loop(ctx context.Context) error {
 					// let's observe the ring. By using JOINING state, this ingester will be ignored by LEAVING
 					// ingesters, but we also signal that it is not fully functional yet.
 					if err := i.autoJoin(context.Background(), JOINING); err != nil {
-						return perrors.Wrapf(err, "failed to pick tokens in the KV store, ring: %s", i.RingName)
+						return errors.Wrapf(err, "failed to pick tokens in the KV store, ring: %s", i.RingName)
 					}
 
 					level.Info(i.logger).Log("msg", "observing tokens before going ACTIVE", "ring", i.RingName)
 					observeChan = time.After(i.cfg.ObservePeriod)
 				} else {
 					if err := i.autoJoin(context.Background(), ACTIVE); err != nil {
-						return perrors.Wrapf(err, "failed to pick tokens in the KV store, ring: %s", i.RingName)
+						return errors.Wrapf(err, "failed to pick tokens in the KV store, ring: %s", i.RingName)
 					}
 				}
 			}
@@ -561,7 +560,7 @@ heartbeatLoop:
 
 	if i.ShouldUnregisterOnShutdown() {
 		if err := i.unregister(context.Background()); err != nil {
-			return perrors.Wrapf(err, "failed to unregister from the KV store, ring: %s", i.RingName)
+			return errors.Wrapf(err, "failed to unregister from the KV store, ring: %s", i.RingName)
 		}
 		level.Info(i.logger).Log("msg", "instance removed from the KV store", "ring", i.RingName)
 	}

pkg/util/log/log.go

@@ -7,7 +7,6 @@ import (
 	"os"
 
 	"github.com/go-kit/log"
-	kitlog "github.com/go-kit/log"
 	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/weaveworks/common/logging"
@@ -27,7 +26,7 @@ var (
 	// Logger is a shared go-kit logger.
 	// TODO: Change all components to take a non-global logger via their constructors.
 	// Prefer accepting a non-global logger as an argument.
-	Logger = kitlog.NewNopLogger()
+	Logger = log.NewNopLogger()
 
 	logMessages = prometheus.NewCounterVec(prometheus.CounterOpts{
 		Name: "log_messages_total",

pkg/util/log/wrappers.go

@@ -4,24 +4,23 @@ import (
 	"context"
 
 	"github.com/go-kit/log"
-	kitlog "github.com/go-kit/log"
 	"github.com/weaveworks/common/tracing"
 
 	"github.com/cortexproject/cortex/pkg/tenant"
 )
 
 // WithUserID returns a Logger that has information about the current user in
 // its details.
-func WithUserID(userID string, l kitlog.Logger) kitlog.Logger {
+func WithUserID(userID string, l log.Logger) log.Logger {
 	// See note in WithContext.
-	return kitlog.With(l, "org_id", userID)
+	return log.With(l, "org_id", userID)
 }
 
 // WithTraceID returns a Logger that has information about the traceID in
 // its details.
-func WithTraceID(traceID string, l kitlog.Logger) kitlog.Logger {
+func WithTraceID(traceID string, l log.Logger) log.Logger {
 	// See note in WithContext.
-	return kitlog.With(l, "traceID", traceID)
+	return log.With(l, "traceID", traceID)
 }
 
 // WithContext returns a Logger that has information about the current user in
@@ -31,7 +30,7 @@ func WithTraceID(traceID string, l kitlog.Logger) kitlog.Logger {
 //
 //	log := util.WithContext(ctx)
 //	log.Errorf("Could not chunk chunks: %v", err)
-func WithContext(ctx context.Context, l kitlog.Logger) kitlog.Logger {
+func WithContext(ctx context.Context, l log.Logger) log.Logger {
 	l = headersFromContext(ctx, l)
 
 	// Weaveworks uses "orgs" and "orgID" to represent Cortex users,
@@ -59,7 +58,7 @@ func WithSourceIPs(sourceIPs string, l log.Logger) log.Logger {
 func headersFromContext(ctx context.Context, l log.Logger) log.Logger {
 	headerContentsMap := HeaderMapFromContext(ctx)
 	for header, contents := range headerContentsMap {
-		l = kitlog.With(l, header, contents)
+		l = log.With(l, header, contents)
 	}
 	return l
 }