remove external golang dependencies (#6712)

go.mod

@@ -8,12 +8,10 @@ require (
 	github.com/cert-manager/cert-manager v1.16.1
 	github.com/dlclark/regexp2 v1.11.4
 	github.com/gkampitakis/go-snaps v0.5.7
-	github.com/go-chi/chi/v5 v5.1.0
 	github.com/go-kit/log v0.2.1
 	github.com/golang-jwt/jwt/v4 v4.5.0
 	github.com/google/go-cmp v0.6.0
 	github.com/jinzhu/copier v0.4.0
-	github.com/kr/pretty v0.3.1
 	github.com/nginxinc/nginx-plus-go-client v1.3.0
 	github.com/nginxinc/nginx-prometheus-exporter v1.3.0
 	github.com/nginxinc/nginx-service-mesh v1.7.0
@@ -84,6 +82,7 @@ require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/kr/pretty v0.3.1 // indirect
 	github.com/kr/text v0.2.0 // indirect
 	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect

go.sum

@@ -75,8 +75,6 @@ github.com/gkampitakis/go-snaps v0.5.7/go.mod h1:ZABkO14uCuVxBHAXAfKG+bqNz+aa1bG
 github.com/go-asn1-ber/asn1-ber v1.5.5/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
 github.com/go-asn1-ber/asn1-ber v1.5.6 h1:CYsqysemXfEaQbyrLJmdsCRuufHoLa3P/gGWGl5TDrM=
 github.com/go-asn1-ber/asn1-ber v1.5.6/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
-github.com/go-chi/chi/v5 v5.1.0 h1:acVI1TYaD+hhedDJ3r54HyA6sExp3HfXq7QWEEY/xMw=
-github.com/go-chi/chi/v5 v5.1.0/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
 github.com/go-jose/go-jose/v4 v4.0.4 h1:VsjPI33J0SB9vQM6PLmNjoHqMQNGPiZ0rHL7Ni7Q6/E=
 github.com/go-jose/go-jose/v4 v4.0.4/go.mod h1:NKb5HO1EZccyMpiZNbdUw/14tiXNyUJh188dfnMCAfc=
 github.com/go-kit/log v0.2.1 h1:MRVx0/zhvdseW+Gza6N9rVzU/IVzaeE1SFI4raAhmBU=

internal/certmanager/test_files/actions.go

@@ -21,7 +21,7 @@ import (
 	"fmt"
 	"reflect"
 
-	"github.com/kr/pretty"
+	"github.com/google/go-cmp/cmp"
 	coretesting "k8s.io/client-go/testing"
 )
 
@@ -94,5 +94,5 @@ func (a *action) Matches(act coretesting.Action) error {
 		return nil
 	}
 
-	return fmt.Errorf("unexpected difference between actions: %s", pretty.Diff(objExp.GetObject(), objAct.GetObject()))
+	return fmt.Errorf("unexpected difference between actions: %s", cmp.Diff(objExp.GetObject(), objAct.GetObject()))
 }

internal/healthcheck/healthcheck.go

@@ -17,7 +17,6 @@ import (
 
 	v1 "k8s.io/api/core/v1"
 
-	"github.com/go-chi/chi/v5"
 	"github.com/nginxinc/kubernetes-ingress/internal/configs"
 	"github.com/nginxinc/nginx-plus-go-client/client"
 	"k8s.io/utils/strings/slices"
@@ -80,9 +79,9 @@ func NewHealthServer(addr string, nc *client.NginxClient, cnf *configs.Configura
 
 // ListenAndServe starts healthcheck server.
 func (hs *HealthServer) ListenAndServe() error {
-	mux := chi.NewRouter()
-	mux.Get("/probe/{hostname}", hs.UpstreamStats)
-	mux.Get("/probe/ts/{name}", hs.StreamStats)
+	mux := http.NewServeMux()
+	mux.HandleFunc("GET /probe/{hostname}", hs.UpstreamStats)
+	mux.HandleFunc("GET /probe/ts/{name}", hs.StreamStats)
 	hs.Server.Handler = mux
 	if hs.Server.TLSConfig != nil {
 		return hs.Server.ListenAndServeTLS("", "")
@@ -97,7 +96,7 @@ func (hs *HealthServer) Shutdown(ctx context.Context) error {
 
 // UpstreamStats calculates health stats for the host identified by the hostname in the request URL.
 func (hs *HealthServer) UpstreamStats(w http.ResponseWriter, r *http.Request) {
-	hostname := chi.URLParam(r, "hostname")
+	hostname := r.PathValue("hostname")
 	host := sanitize(hostname)
 
 	upstreamNames := hs.UpstreamsForHost(host)
@@ -137,7 +136,7 @@ func (hs *HealthServer) UpstreamStats(w http.ResponseWriter, r *http.Request) {
 // StreamStats calculates health stats for the TransportServer(s)
 // identified by the service (action) name in the request URL.
 func (hs *HealthServer) StreamStats(w http.ResponseWriter, r *http.Request) {
-	name := chi.URLParam(r, "name")
+	name := r.PathValue("name")
 	n := sanitize(name)
 	streamUpstreamNames := hs.StreamUpstreamsForName(n)
 	if len(streamUpstreamNames) == 0 {

internal/healthcheck/healthcheck_test.go

@@ -12,17 +12,16 @@ import (
 	nic_glog "github.com/nginxinc/kubernetes-ingress/internal/logger/glog"
 	"github.com/nginxinc/kubernetes-ingress/internal/logger/levels"
 
-	"github.com/go-chi/chi/v5"
 	"github.com/google/go-cmp/cmp"
 	"github.com/nginxinc/kubernetes-ingress/internal/healthcheck"
 	"github.com/nginxinc/nginx-plus-go-client/client"
 )
 
 // testHandler creates http handler for testing HealthServer.
 func testHandler(hs *healthcheck.HealthServer) http.Handler {
-	mux := chi.NewRouter()
-	mux.Get("/probe/{hostname}", hs.UpstreamStats)
-	mux.Get("/probe/ts/{name}", hs.StreamStats)
+	mux := http.NewServeMux()
+	mux.HandleFunc("GET /probe/{hostname}", hs.UpstreamStats)
+	mux.HandleFunc("GET /probe/ts/{name}", hs.StreamStats)
 	return mux
 }
 

internal/metrics/listener.go

@@ -11,7 +11,6 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/go-chi/chi/v5"
 	kitlog "github.com/go-kit/log"
 	"github.com/go-kit/log/level"
 	prometheusClient "github.com/nginxinc/nginx-prometheus-exporter/client"
@@ -112,8 +111,8 @@ func (s *Server) Home(w http.ResponseWriter, r *http.Request) { //nolint:revive
 
 // ListenAndServe starts metrics server.
 func (s *Server) ListenAndServe() error {
-	mux := chi.NewRouter()
-	mux.Get("/", s.Home)
+	mux := http.NewServeMux()
+	mux.HandleFunc("GET /{$}", s.Home)
 	mux.Handle("/metrics", promhttp.HandlerFor(s.Registry, promhttp.HandlerOpts{}))
 	s.Server.Handler = mux
 	if s.Server.TLSConfig != nil {