chore(deps): remove dependency on github.com/prometheus/prometheus (#…

…6204)

We were maintaining this dependency for a label check that
is very simple and unlikely to change. Opted for duplicating it
instead

Signed-off-by: Charly Molter <charly.molter@konghq.com>

go.mod

@@ -41,7 +41,6 @@ require (
 	github.com/prometheus/client_golang v1.14.0
 	github.com/prometheus/client_model v0.3.0
 	github.com/prometheus/common v0.40.0
-	github.com/prometheus/prometheus v0.42.0
 	github.com/sethvargo/go-retry v0.2.4
 	github.com/shopspring/decimal v1.3.1
 	github.com/slok/go-http-metrics v0.10.0
@@ -127,7 +126,6 @@ require (
 	github.com/google/pprof v0.0.0-20230111200839-76d1ae5aea2b // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.2.1 // indirect
 	github.com/googleapis/gax-go/v2 v2.7.0 // indirect
-	github.com/grafana/regexp v0.0.0-20221122212121-6b5c0a4cb7fd // indirect
 	github.com/gruntwork-io/go-commons v0.8.0 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/hashicorp/go-multierror v1.1.1 // indirect

go.sum

@@ -725,8 +725,6 @@ github.com/gorilla/mux v1.7.4/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB7
 github.com/gorilla/websocket v0.0.0-20170926233335-4201258b820c/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
 github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
 github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
-github.com/grafana/regexp v0.0.0-20221122212121-6b5c0a4cb7fd h1:PpuIBO5P3e9hpqBD0O/HjhShYuM6XE0i/lbE6J94kww=
-github.com/grafana/regexp v0.0.0-20221122212121-6b5c0a4cb7fd/go.mod h1:M5qHK+eWfAv8VR/265dIuEpL3fNfeC21tXXp9itM24A=
 github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7/go.mod h1:FecbI9+v66THATjSRHfNgh1IVFe/9kFxbXtjV0ctIMA=
 github.com/grpc-ecosystem/go-grpc-middleware v1.0.0/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
 github.com/grpc-ecosystem/go-grpc-middleware v1.0.1-0.20190118093823-f849b5445de4/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
@@ -1186,8 +1184,6 @@ github.com/prometheus/procfs v0.6.0/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1
 github.com/prometheus/procfs v0.7.3/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
 github.com/prometheus/procfs v0.8.0 h1:ODq8ZFEaYeCaZOJlZZdJA2AbQR98dSHSM1KW/You5mo=
 github.com/prometheus/procfs v0.8.0/go.mod h1:z7EfXMXOkbkqb9IINtpCn86r/to3BnA0uaxHdg830/4=
-github.com/prometheus/prometheus v0.42.0 h1:G769v8covTkOiNckXFIwLx01XE04OE6Fr0JPA0oR2nI=
-github.com/prometheus/prometheus v0.42.0/go.mod h1:Pfqb/MLnnR2KK+0vchiaH39jXxvLMBk+3lnIGP4N7Vk=
 github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
 github.com/remyoudompheng/bigfft v0.0.0-20190728182440-6a916e37a237/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=

pkg/mads/util.go

@@ -3,11 +3,10 @@ package mads
 import (
 	"fmt"
 	"net"
+	"regexp"
 	"strconv"
 	"strings"
 
-	prom_util "github.com/prometheus/prometheus/util/strutil"
-
 	mesh_proto "github.com/kumahq/kuma/api/mesh/v1alpha1"
 	core_mesh "github.com/kumahq/kuma/pkg/core/resources/apis/mesh"
 	"github.com/kumahq/kuma/pkg/xds/topology"
@@ -44,17 +43,17 @@ func DataplaneLabels(dataplane *core_mesh.DataplaneResource, meshGateways []*cor
 			value = values[0]
 		}
 		// while in general case a tag might have multiple values, we want to optimize for a single-value scenario
-		labels[prom_util.SanitizeLabelName(key)] = value
+		labels[sanitizeLabelName(key)] = value
 		// additionally, we also support a multi-value scenario by automatically pluralizing label name,
 		// e.g. `service => services`, `version => versions`, etc.
 		// if it happens that a user defined both `service` and `services` tags,
 		// user-defined `services` tag will override auto-generated one (since keys are iterated in a sorted order)
 		plural := fmt.Sprintf("%ss", key)
-		labels[prom_util.SanitizeLabelName(plural)] = MultiValue(values)
+		labels[sanitizeLabelName(plural)] = MultiValue(values)
 	}
 	// then, we turn name extensions into labels
 	for key, value := range dataplane.GetMeta().GetNameExtensions() {
-		labels[prom_util.SanitizeLabelName(key)] = value
+		labels[sanitizeLabelName(key)] = value
 	}
 
 	if dataplane.Spec.IsBuiltinGateway() {
@@ -73,3 +72,12 @@ func DataplaneAssignmentName(dataplane *core_mesh.DataplaneResource) string {
 	// unique name, e.g. REST API uri
 	return fmt.Sprintf("/meshes/%s/dataplanes/%s", dataplane.Meta.GetMesh(), dataplane.Meta.GetName())
 }
+
+var invalidLabelCharRE = regexp.MustCompile(`[^a-zA-Z0-9_]`)
+
+// SanitizeLabelName replaces anything that doesn't match
+// client_label.LabelNameRE with an underscore.
+// taken from: https://github.com/prometheus/prometheus/blob/d437f0bb6b53ec8594a43b871f92252980b13ddd/util/strutil/strconv.go#L40-L47
+func sanitizeLabelName(name string) string {
+	return invalidLabelCharRE.ReplaceAllString(name, "_")
+}