chore!: adopt log/slog, drop go-kit/log

.golangci.yml

@@ -15,6 +15,7 @@ linters:
     - goimports
     - revive
     - misspell
+    - sloglint
 
 issues:
   max-same-issues: 0
@@ -34,8 +35,6 @@ linters-settings:
             desc: "Use errors or fmt instead of github.com/pkg/errors"
           - pkg: "github.com/stretchr/testify/assert"
             desc: "Use github.com/stretchr/testify/require instead of github.com/stretchr/testify/assert"
-          - pkg: "github.com/go-kit/kit/log"
-            desc: "Use github.com/go-kit/log instead of github.com/go-kit/kit/log"
           - pkg: "io/ioutil"
             desc: "Use corresponding 'os' or 'io' functions instead."
           - pkg: "regexp"
@@ -49,8 +48,6 @@ linters-settings:
       - (net/http.ResponseWriter).Write
       # No need to check for errors on server's shutdown.
       - (*net/http.Server).Shutdown
-      # Never check for logger errors.
-      - (github.com/go-kit/log.Logger).Log
       # Never check for rollback errors as Rollback() is called when a previous error was detected.
       - (github.com/prometheus/prometheus/storage.Appender).Rollback
   goimports:

cmd/promlens/main.go

@@ -16,20 +16,19 @@ package main
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"net"
 	"net/url"
 	"os"
 	"path/filepath"
 	"strings"
 	"time"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
-	"github.com/prometheus/common/promlog"
-	promlogflag "github.com/prometheus/common/promlog/flag"
+	"github.com/alecthomas/kingpin/v2"
+	"github.com/prometheus/common/promslog"
+	promslogflag "github.com/prometheus/common/promslog/flag"
 	"github.com/prometheus/common/version"
 	"github.com/prometheus/exporter-toolkit/web/kingpinflag"
-	"gopkg.in/alecthomas/kingpin.v2"
 
 	"github.com/prometheus/promlens/pkg/grafana"
 	"github.com/prometheus/promlens/pkg/sharer"
@@ -79,7 +78,7 @@ func computeExternalURL(u string, listenAddrs []string) (*url.URL, error) {
 	return eu, nil
 }
 
-func getLinkSharer(logger log.Logger, gcsBucket string, sqlDriver string, sqlDSN string, createTables bool, sqlRetention time.Duration) (sharer.Sharer, error) {
+func getLinkSharer(logger *slog.Logger, gcsBucket string, sqlDriver string, sqlDSN string, createTables bool, sqlRetention time.Duration) (sharer.Sharer, error) {
 	if sqlDSN == "" && gcsBucket == "" {
 		return nil, nil
 	}
@@ -90,7 +89,7 @@ func getLinkSharer(logger log.Logger, gcsBucket string, sqlDriver string, sqlDSN
 
 	if sqlDriver == "sqlite3" {
 		sqlDriver = "sqlite"
-		level.Warn(logger).Log("msg", "The 'sqlite3' driver is deprecated, using 'sqlite' as a replacement.")
+		logger.Warn("The 'sqlite3' driver is deprecated, using 'sqlite' as a replacement.")
 	}
 
 	if sqlDSN != "" {
@@ -162,8 +161,8 @@ func main() {
 
 	defaultPrometheusURL := app.Flag("web.default-prometheus-url", "The default Prometheus URL to load PromLens with.").Default("").String()
 
-	var logCfg promlog.Config
-	promlogflag.AddFlags(app, &logCfg)
+	var logCfg promslog.Config
+	promslogflag.AddFlags(app, &logCfg)
 
 	toolkitConfig := kingpinflag.AddFlags(app, ":8080")
 
@@ -174,11 +173,11 @@ func main() {
 		os.Exit(2)
 	}
 
-	logger := promlog.New(&logCfg)
+	logger := promslog.New(&logCfg)
 
 	externalURL, err := computeExternalURL(*promlensURL, *toolkitConfig.WebListenAddresses)
 	if err != nil {
-		level.Error(logger).Log("msg", "Error parsing external URL.", "err", err, "url", *promlensURL)
+		logger.Error("Error parsing external URL.", "err", err, "url", *promlensURL)
 		os.Exit(2)
 	}
 
@@ -195,28 +194,28 @@ func main() {
 	}
 	shr, err := getLinkSharer(logger, *sharedLinksGCSBucket, *sharedLinksSQLDriver, *sharedLinksSQLDSN, *createSharedLinksTables, *sharedLinksRetention)
 	if err != nil {
-		level.Error(logger).Log("msg", "Error initializing link sharer.", "err", err)
+		logger.Error("Error initializing link sharer.", "err", err)
 		os.Exit(2)
 	}
 	if shr == nil {
-		level.Info(logger).Log("msg", "No link sharing backends are enabled - disabling link sharing functionality.")
+		logger.Info("No link sharing backends are enabled - disabling link sharing functionality.")
 	} else {
 		defer func() {
-			level.Info(logger).Log("msg", "Closing link sharer.")
+			logger.Info("Closing link sharer.")
 			shr.Close()
 		}()
 	}
 
 	gb, err := getGrafanaBackend(*grafanaURL, *grafanaToken, *grafanaTokenFile)
 	if err != nil {
-		level.Error(logger).Log("msg", "Error initializing Grafana backend.", "err", err)
+		logger.Error("Error initializing Grafana backend.", "err", err)
 		os.Exit(2)
 	}
 	if gb == nil {
-		level.Info(logger).Log("msg", "No Grafana backend enabled - disabling Grafana datasource integration.")
+		logger.Info("No Grafana backend enabled - disabling Grafana datasource integration.")
 	}
 
-	level.Error(logger).Log("msg", "Running HTTP server failed.", "err", web.Serve(&web.Config{
+	logger.Error("Running HTTP server failed.", "err", web.Serve(&web.Config{
 		Logger:                     logger,
 		ToolkitConfig:              toolkitConfig,
 		RoutePrefix:                *routePrefix,

go.mod

@@ -4,19 +4,18 @@ go 1.22
 
 require (
 	cloud.google.com/go/storage v1.46.0
+	github.com/alecthomas/kingpin/v2 v2.4.0
 	github.com/glebarez/go-sqlite v1.22.0
-	github.com/go-kit/log v0.2.1
 	github.com/go-sql-driver/mysql v1.7.1
 	github.com/grafana/regexp v0.0.0-20221122212121-6b5c0a4cb7fd
 	github.com/lib/pq v1.10.9
-	github.com/prometheus/client_golang v1.14.0
-	github.com/prometheus/common v0.39.0
+	github.com/prometheus/client_golang v1.20.5
+	github.com/prometheus/common v0.60.1
 	github.com/prometheus/common/assets v0.2.0
-	github.com/prometheus/exporter-toolkit v0.8.2
+	github.com/prometheus/exporter-toolkit v0.13.1
 	github.com/prometheus/prometheus v0.41.0
 	github.com/russross/blackfriday/v2 v2.1.0
 	golang.org/x/net v0.31.0
-	gopkg.in/alecthomas/kingpin.v2 v2.2.6
 )
 
 require (
@@ -30,46 +29,50 @@ require (
 	github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.24.1 // indirect
 	github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/metric v0.48.1 // indirect
 	github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.48.1 // indirect
-	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
 	github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 // indirect
 	github.com/aws/aws-sdk-go v1.44.159 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/census-instrumentation/opencensus-proto v0.4.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cncf/xds/go v0.0.0-20240905190251-b4127c9b8d78 // indirect
-	github.com/coreos/go-systemd/v22 v22.4.0 // indirect
+	github.com/coreos/go-systemd/v22 v22.5.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dennwc/varint v1.0.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/edsrzf/mmap-go v1.1.0 // indirect
 	github.com/envoyproxy/go-control-plane v0.13.0 // indirect
 	github.com/envoyproxy/protoc-gen-validate v1.1.0 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
+	github.com/go-kit/log v0.2.1 // indirect
 	github.com/go-logfmt/logfmt v0.5.1 // indirect
 	github.com/go-logr/logr v1.4.2 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
-	github.com/golang/protobuf v1.5.4 // indirect
 	github.com/golang/snappy v0.0.4 // indirect
 	github.com/google/s2a-go v0.1.8 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.3.4 // indirect
 	github.com/googleapis/gax-go/v2 v2.13.0 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/jpillora/backoff v1.0.0 // indirect
+	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
+	github.com/mdlayher/socket v0.4.1 // indirect
+	github.com/mdlayher/vsock v1.2.1 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f // indirect
 	github.com/oklog/ulid v1.3.1 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/prometheus/client_model v0.6.0 // indirect
+	github.com/prometheus/client_model v0.6.1 // indirect
 	github.com/prometheus/common/sigv4 v0.1.0 // indirect
-	github.com/prometheus/procfs v0.8.0 // indirect
+	github.com/prometheus/procfs v0.15.1 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/stretchr/testify v1.9.0 // indirect
+	github.com/xhit/go-str2duration/v2 v2.1.0 // indirect
 	go.opencensus.io v0.24.0 // indirect
 	go.opentelemetry.io/contrib/detectors/gcp v1.29.0 // indirect
 	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.54.0 // indirect

go.sum

@@ -83,8 +83,9 @@ github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapp
 github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.48.1/go.mod h1:viRWSEhtMZqz1rhwmOVKkWl6SwmVowfL9O2YR5gI2PE=
 github.com/Microsoft/go-winio v0.5.1 h1:aPJp2QD7OOrhO5tQXqQoGSJc+DjDtWTGLOmNyAm6FgY=
 github.com/Microsoft/go-winio v0.5.1/go.mod h1:JPGBdM1cNvN/6ISo+n8V5iA4v8pBzdOpzfwIujj1a84=
+github.com/alecthomas/kingpin/v2 v2.4.0 h1:f48lwail6p8zpO1bC4TxtqACaGqHYA22qkHjHpqDjYY=
+github.com/alecthomas/kingpin/v2 v2.4.0/go.mod h1:0gyi0zQnjuFk8xrkNKamJoyUo382HRL7ATRpFZCw6tE=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 h1:JYp7IbQjafoB+tBA3gMyHYHrpOtNuDiK/uB5uXxq5wM=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
@@ -113,8 +114,8 @@ github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDk
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/xds/go v0.0.0-20240905190251-b4127c9b8d78 h1:QVw89YDxXxEe+l8gU8ETbOasdwEV+avkR75ZzsVV9WI=
 github.com/cncf/xds/go v0.0.0-20240905190251-b4127c9b8d78/go.mod h1:W+zGtBO5Y1IgJhy4+A9GOqVhqLpfZi+vwmdNXUehLA8=
-github.com/coreos/go-systemd/v22 v22.4.0 h1:y9YHcjnjynCd/DVbg5j9L/33jQM3MxJlbj/zWskzfGU=
-github.com/coreos/go-systemd/v22 v22.4.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
+github.com/coreos/go-systemd/v22 v22.5.0 h1:RrqgGjYQKalulkV8NGVIfkXQf6YYmOyiJKk8iXXhfZs=
+github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -321,6 +322,8 @@ github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7V
 github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
+github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
+github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
 github.com/kolo/xmlrpc v0.0.0-20220921171641-a4b6fa1dd06b h1:udzkj9S/zlT5X367kqJis0QP7YMxobob6zhzq6Yre00=
 github.com/kolo/xmlrpc v0.0.0-20220921171641-a4b6fa1dd06b/go.mod h1:pcaDhQK0/NJZEvtCO0qQPPropqV0sJOJ6YW7X+9kRwM=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
@@ -333,6 +336,8 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
+github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
 github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/linode/linodego v1.9.3 h1:+lxNZw4avRxhCqGjwfPgQ2PvMT+vOL0OMsTdzixR7hQ=
@@ -344,8 +349,10 @@ github.com/mattn/go-colorable v0.1.12/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
-github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zkfA9PSy5pEvNWRP0ET0TIVo=
-github.com/matttproud/golang_protobuf_extensions v1.0.4/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
+github.com/mdlayher/socket v0.4.1 h1:eM9y2/jlbs1M615oshPQOHZzj6R6wMT7bX5NPiQvn2U=
+github.com/mdlayher/socket v0.4.1/go.mod h1:cAqeGjoufqdxWkD7DkpyS+wcefOtmu5OQ8KuoJGIReA=
+github.com/mdlayher/vsock v1.2.1 h1:pC1mTJTvjo1r9n9fbm7S1j04rCgCzhCOS5DY0zqHlnQ=
+github.com/mdlayher/vsock v1.2.1/go.mod h1:NRfCibel++DgeMD8z/hP+PPTjlNJsdPOmxcnENvE+SE=
 github.com/miekg/dns v1.1.50 h1:DQUfb9uc6smULcREF09Uc+/Gd46YWqJd5DbpPE9xkcA=
 github.com/miekg/dns v1.1.50/go.mod h1:e3IlAVfNqAllflbibAZEWOXOQ+Ynzk/dDozDxY7XnME=
 github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
@@ -384,32 +391,32 @@ github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXP
 github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo=
 github.com/prometheus/client_golang v1.7.1/go.mod h1:PY5Wy2awLA44sXw4AOSfFBetzPP4j5+D6mVACh+pe2M=
 github.com/prometheus/client_golang v1.11.0/go.mod h1:Z6t4BnS23TR94PD6BsDNk8yVqroYurpAkEiz0P2BEV0=
-github.com/prometheus/client_golang v1.14.0 h1:nJdhIvne2eSX/XRAFV9PcvFFRbrjbcTUj0VP62TMhnw=
-github.com/prometheus/client_golang v1.14.0/go.mod h1:8vpkKitgIVNcqrRBWh1C4TIUQgYNtG/XQE4E/Zae36Y=
+github.com/prometheus/client_golang v1.20.5 h1:cxppBPuYhUnsO6yo/aoRol4L7q7UFfdm+bR9r+8l63Y=
+github.com/prometheus/client_golang v1.20.5/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
 github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
 github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/client_model v0.2.0/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
-github.com/prometheus/client_model v0.6.0 h1:k1v3CzpSRUTrKMppY35TLwPvxHqBu0bYgxZzqGIgaos=
-github.com/prometheus/client_model v0.6.0/go.mod h1:NTQHnmxFpouOD0DpvP4XujX3CdOAGQPoaGhyTchlyt8=
+github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=
+github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY=
 github.com/prometheus/common v0.4.1/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
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@@ -443,6 +450,8 @@ github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsT
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@@ -777,7 +786,6 @@ google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlba
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