chore(deps): remove phayes/freeport module

Replaces the `phayes/freeport` module with the standard library's
`net.Listen("tcp", "127.0.0.1:0")` idiom. This removes an unnecessary
dependency and simplifies the codebase.

Signed-off-by: Mikel Olasagasti Uranga <mikel@olasagasti.info>

go.mod

@@ -25,7 +25,6 @@ require (
 	github.com/mitchellh/copystructure v1.2.0
 	github.com/moby/term v0.5.2
 	github.com/opencontainers/image-spec v1.1.1
-	github.com/phayes/freeport v0.0.0-20220201140144-74d24b5ae9f5
 	github.com/rubenv/sql-migrate v1.8.0
 	github.com/santhosh-tekuri/jsonschema/v6 v6.0.2
 	github.com/spf13/cobra v1.9.1

go.sum

@@ -249,8 +249,6 @@ github.com/opencontainers/image-spec v1.1.1 h1:y0fUlFfIZhPF1W537XOLg0/fcx6zcHCJw
 github.com/opencontainers/image-spec v1.1.1/go.mod h1:qpqAh3Dmcf36wStyyWU+kCeDgrGnAve2nCC8+7h8Q0M=
 github.com/peterbourgon/diskv v2.0.1+incompatible h1:UBdAOUP5p4RWqPBg048CAvpKN+vxiaj6gdUUzhl4XmI=
 github.com/peterbourgon/diskv v2.0.1+incompatible/go.mod h1:uqqh8zWWbv1HBMNONnaR/tNboyR3/BZd58JJSHlUSCU=
-github.com/phayes/freeport v0.0.0-20220201140144-74d24b5ae9f5 h1:Ii+DKncOVM8Cu1Hc+ETb5K+23HdAMvESYE3ZJ5b5cMI=
-github.com/phayes/freeport v0.0.0-20220201140144-74d24b5ae9f5/go.mod h1:iIss55rKnNBTvrwdmkUpLnDpZoAHvWaiq5+iMmen4AE=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=

pkg/registry/utils_test.go

@@ -37,7 +37,6 @@ import (
 	_ "github.com/distribution/distribution/v3/registry/auth/htpasswd"
 	_ "github.com/distribution/distribution/v3/registry/storage/driver/inmemory"
 	"github.com/foxcpp/go-mockdns"
-	"github.com/phayes/freeport"
 	"github.com/stretchr/testify/suite"
 	"golang.org/x/crypto/bcrypt"
 
@@ -127,12 +126,14 @@ func setup(suite *TestSuite, tlsEnabled, insecure bool) *registry.Registry {
 
 	// Registry config
 	config := &configuration.Configuration{}
-	port, err := freeport.GetFreePort()
+	ln, err := net.Listen("tcp", "127.0.0.1:0")
 	suite.Nil(err, "no error finding free port for test registry")
+	defer ln.Close()
 
 	// Change the registry host to another host which is not localhost.
 	// This is required because Docker enforces HTTP if the registry
 	// host is localhost/127.0.0.1.
+	port := ln.Addr().(*net.TCPAddr).Port
 	suite.DockerRegistryHost = fmt.Sprintf("helm-test-registry:%d", port)
 	suite.srv, err = mockdns.NewServer(map[string]mockdns.Zone{
 		"helm-test-registry.": {
@@ -142,7 +143,7 @@ func setup(suite *TestSuite, tlsEnabled, insecure bool) *registry.Registry {
 	suite.Nil(err, "no error creating mock DNS server")
 	suite.srv.PatchNet(net.DefaultResolver)
 
-	config.HTTP.Addr = fmt.Sprintf("127.0.0.1:%d", port)
+	config.HTTP.Addr = ln.Addr().String()
 	config.HTTP.DrainTimeout = time.Duration(10) * time.Second
 	config.Storage = map[string]configuration.Parameters{"inmemory": map[string]interface{}{}}
 

pkg/repo/repotest/server.go

@@ -18,6 +18,7 @@ package repotest
 import (
 	"crypto/tls"
 	"fmt"
+	"net"
 	"net/http"
 	"net/http/httptest"
 	"os"
@@ -29,7 +30,6 @@ import (
 	"github.com/distribution/distribution/v3/registry"
 	_ "github.com/distribution/distribution/v3/registry/auth/htpasswd"           // used for docker test registry
 	_ "github.com/distribution/distribution/v3/registry/storage/driver/inmemory" // used for docker test registry
-	"github.com/phayes/freeport"
 	"golang.org/x/crypto/bcrypt"
 	"sigs.k8s.io/yaml"
 
@@ -176,12 +176,14 @@ func NewOCIServer(t *testing.T, dir string) (*OCIServer, error) {
 
 	// Registry config
 	config := &configuration.Configuration{}
-	port, err := freeport.GetFreePort()
+	ln, err := net.Listen("tcp", "127.0.0.1:0")
 	if err != nil {
 		t.Fatalf("error finding free port for test registry")
 	}
+	defer ln.Close()
 
-	config.HTTP.Addr = fmt.Sprintf("127.0.0.1:%d", port)
+	port := ln.Addr().(*net.TCPAddr).Port
+	config.HTTP.Addr = ln.Addr().String()
 	config.HTTP.DrainTimeout = time.Duration(10) * time.Second
 	config.Storage = map[string]configuration.Parameters{"inmemory": map[string]interface{}{}}
 	config.Auth = configuration.Auth{