Remove custom http transport in git resolver

- The default http transport will handle proxy logic so there isnt a
  need for us to create our own transport

pkg/git/fetch.go

@@ -2,19 +2,14 @@ package git
 
 import (
 	"log"
-	"net/http"
-	"net/url"
 	"os"
 	"path"
-	"time"
 
 	"github.com/BurntSushi/toml"
 	gogit "github.com/go-git/go-git/v5"
 	"github.com/go-git/go-git/v5/config"
 	"github.com/go-git/go-git/v5/plumbing"
 	"github.com/go-git/go-git/v5/plumbing/transport"
-	"github.com/go-git/go-git/v5/plumbing/transport/client"
-	githttp "github.com/go-git/go-git/v5/plumbing/transport/http"
 	"github.com/pkg/errors"
 )
 
@@ -43,12 +38,6 @@ func (f Fetcher) Fetch(dir, gitURL, gitRevision, metadataDir string) error {
 		return errors.Wrap(err, "creating remote")
 	}
 
-	httpsTransport, err := getHttpsTransport()
-	if err != nil {
-		return err
-	}
-	client.InstallProtocol("https", httpsTransport)
-
 	err = remote.Fetch(&gogit.FetchOptions{
 		RefSpecs: []config.RefSpec{"refs/*:refs/*"},
 		Auth:     auth,
@@ -74,7 +63,6 @@ func (f Fetcher) Fetch(dir, gitURL, gitRevision, metadataDir string) error {
 		return errors.Wrapf(err, "checking out revision")
 	}
 
-	// Write the git revision to the metadata directory
 	projectMetadataFile, err := os.Create(path.Join(metadataDir, "project-metadata.toml"))
 	if err != nil {
 		return errors.Wrapf(err, "invalid metadata destination '%s/project-metadata.toml' for git repository: %s", metadataDir, gitURL)
@@ -101,27 +89,6 @@ func (f Fetcher) Fetch(dir, gitURL, gitRevision, metadataDir string) error {
 	return nil
 }
 
-func getHttpsTransport() (transport.Transport, error) {
-	if httpsProxy, exists := os.LookupEnv("HTTPS_PROXY"); exists {
-		parsedUrl, err := url.Parse(httpsProxy)
-		if err != nil {
-			return nil, errors.Wrap(err, "parsing HTTPS_PROXY url")
-		}
-		proxyClient := &http.Client{
-			Transport: &http.Transport{
-				Proxy: http.ProxyURL(parsedUrl),
-			},
-			Timeout: 15 * time.Second,
-			CheckRedirect: func(req *http.Request, via []*http.Request) error {
-				return http.ErrUseLastResponse
-			},
-		}
-		return githttp.NewClient(proxyClient), nil
-	} else {
-		return githttp.DefaultClient, nil
-	}
-}
-
 type project struct {
 	Source source `toml:"source"`
 }

pkg/git/fetch_test.go

@@ -15,7 +15,7 @@ import (
 )
 
 func TestGitCheckout(t *testing.T) {
-	spec.Run(t, "Test Describe Image", testGitCheckout)
+	spec.Run(t, "Test Git Checkout", testGitCheckout)
 }
 
 func testGitCheckout(t *testing.T, when spec.G, it spec.S) {
@@ -35,8 +35,6 @@ func testGitCheckout(t *testing.T, when spec.G, it spec.S) {
 
 			metadataDir, err = os.MkdirTemp("", "test-git")
 			require.NoError(t, err)
-
-			require.NoError(t, os.Unsetenv("HTTPS_PROXY"))
 		})
 
 		it.After(func() {
@@ -108,15 +106,6 @@ func testGitCheckout(t *testing.T, when spec.G, it spec.S) {
 			err := fetcher.Fetch(testDir, "git@bitbucket.com:org/repo", "main", metadataDir)
 			require.ErrorContains(t, err, "unable to fetch references for repository")
 		})
-
-		it("uses the http proxy env vars", func() {
-			require.NoError(t, os.Setenv("HTTPS_PROXY", "http://invalid-proxy"))
-			defer os.Unsetenv("HTTPS_PROXY")
-
-			err := fetcher.Fetch(testDir, "https://github.com/git-fixtures/basic", "master", metadataDir)
-			require.Error(t, err)
-			require.Contains(t, err.Error(), "proxyconnect tcp: dial tcp")
-		})
 	})
 }
 

pkg/git/remote_git_resolver.go

@@ -5,7 +5,6 @@ import (
 	"github.com/go-git/go-git/v5/config"
 	"github.com/go-git/go-git/v5/plumbing"
 	"github.com/go-git/go-git/v5/plumbing/transport"
-	"github.com/go-git/go-git/v5/plumbing/transport/client"
 	"github.com/go-git/go-git/v5/storage/memory"
 
 	corev1alpha1 "github.com/pivotal/kpack/pkg/apis/core/v1alpha1"
@@ -21,19 +20,6 @@ func (*remoteGitResolver) Resolve(auth transport.AuthMethod, sourceConfig corev1
 		URLs: []string{sourceConfig.Git.URL},
 	})
 
-	httpsTransport, err := getHttpsTransport()
-	if err != nil {
-		return corev1alpha1.ResolvedSourceConfig{
-			Git: &corev1alpha1.ResolvedGitSource{
-				URL:      sourceConfig.Git.URL,
-				Revision: sourceConfig.Git.Revision,
-				Type:     corev1alpha1.Unknown,
-				SubPath:  sourceConfig.SubPath,
-			},
-		}, nil
-	}
-	client.InstallProtocol("https", httpsTransport)
-
 	refs, err := remote.List(&gogit.ListOptions{
 		Auth: auth,
 	})