internal/task: use authenticated git client in priv patch workflow

For golang/go#65756.

Change-Id: Iec9bfcd1ed02913323dc8e20a6b6eeb0eddf7f51
Reviewed-on: https://go-review.googlesource.com/c/build/+/566995
Reviewed-by: Dmitri Shuralyov <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>

Author: rolandshoemaker

cmd/relui/main.go

@@ -308,6 +308,7 @@ func main() {
 	dh.RegisterDefinition("Sync go-private master branch with public", privateSyncTask.NewDefinition())
 
 	privateXPatchTask := &task.PrivXPatch{
+		Git:           gitClient,
 		PublicGerrit:  gerritClient,
 		PrivateGerrit: privateGerritClient,
 		PublicRepoURL: func(repo string) string {

internal/task/privx.go

@@ -19,6 +19,7 @@ import (
 )
 
 type PrivXPatch struct {
+	Git           *Git
 	PublicGerrit  GerritClient
 	PrivateGerrit GerritClient
 	// PublicRepoURL returns a git clone URL for repo
@@ -75,9 +76,7 @@ func (x *PrivXPatch) NewDefinition(tagx *TagXReposTasks) *wf.Definition {
 		// to replicate from one instance to another using the API alone. Rather
 		// than adding workarounds for those edge cases, we just use Git
 		// directly, which makes the process extremely simple.
-		git := &Git{}
-
-		repo, err := git.Clone(ctx, x.PublicRepoURL(repoName))
+		repo, err := x.Git.Clone(ctx, x.PublicRepoURL(repoName))
 		if err != nil {
 			return nil, err
 		}

internal/task/privx_test.go

@@ -90,6 +90,7 @@ echo`), 0777); err != nil {
 	var announcementHeader MailHeader
 	var announcementMessage MailContent
 	p := &PrivXPatch{
+		Git:           &Git{},
 		PrivateGerrit: &privxClient{privRepoDir: privRepo.dir.dir},
 		PublicGerrit:  &privxClient{},