Refactor modules/git global variables (#29376)

Move some global variables into a struct to improve maintainability

routers/private/hook_post_receive.go

@@ -124,7 +124,7 @@ func HookPostReceive(ctx *gitea_context.PrivateContext) {
 
 		// post update for agit pull request
 		// FIXME: use pr.Flow to test whether it's an Agit PR or a GH PR
-		if git.SupportProcReceive && refFullName.IsPull() {
+		if git.DefaultFeatures.SupportProcReceive && refFullName.IsPull() {
 			if repo == nil {
 				repo = loadRepository(ctx, ownerName, repoName)
 				if ctx.Written() {

routers/private/hook_pre_receive.go

@@ -122,7 +122,7 @@ func HookPreReceive(ctx *gitea_context.PrivateContext) {
 			preReceiveBranch(ourCtx, oldCommitID, newCommitID, refFullName)
 		case refFullName.IsTag():
 			preReceiveTag(ourCtx, oldCommitID, newCommitID, refFullName)
-		case git.SupportProcReceive && refFullName.IsFor():
+		case git.DefaultFeatures.SupportProcReceive && refFullName.IsFor():
 			preReceiveFor(ourCtx, oldCommitID, newCommitID, refFullName)
 		default:
 			ourCtx.AssertCanWriteCode()

routers/private/hook_proc_receive.go

@@ -18,7 +18,7 @@ import (
 // HookProcReceive proc-receive hook - only handles agit Proc-Receive requests at present
 func HookProcReceive(ctx *gitea_context.PrivateContext) {
 	opts := web.GetForm(ctx).(*private.HookOptions)
-	if !git.SupportProcReceive {
+	if !git.DefaultFeatures.SupportProcReceive {
 		ctx.Status(http.StatusNotFound)
 		return
 	}

routers/private/serv.go

@@ -297,7 +297,7 @@ func ServCommand(ctx *context.PrivateContext) {
 			}
 		} else {
 			// Because of the special ref "refs/for" we will need to delay write permission check
-			if git.SupportProcReceive && unitType == unit.TypeCode {
+			if git.DefaultFeatures.SupportProcReceive && unitType == unit.TypeCode {
 				mode = perm.AccessModeRead
 			}