Make sure git version&feature are always prepared (#30877)

Otherwise there would be more similar issues like #29287

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, refFullName)
-		case git.DefaultFeatures.SupportProcReceive && refFullName.IsFor():
+		case git.DefaultFeatures().SupportProcReceive && refFullName.IsFor():
 			preReceiveFor(ourCtx, 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.DefaultFeatures.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.DefaultFeatures.SupportProcReceive && unitType == unit.TypeCode {
+			if git.DefaultFeatures().SupportProcReceive && unitType == unit.TypeCode {
 				mode = perm.AccessModeRead
 			}