From c92b09d3e71a17c68f1d409dd0cd465439c27154 Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Wed, 13 May 2020 15:15:37 +0200
Subject: [PATCH] vup: run make only on breaking changes

---
 cmd/tools/vup.v | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/cmd/tools/vup.v b/cmd/tools/vup.v
index 899865ec37..6b36a29a47 100644
--- a/cmd/tools/vup.v
+++ b/cmd/tools/vup.v
@@ -43,10 +43,18 @@ fn main() {
 
 		backup('cmd/tools/vup.exe')
 	} $else {
-		make_result := os.exec('make') or {
+		self_result := os.exec('./v self') or {
 			panic(err)
 		}
-		println(make_result.output)
+		println(self_result.output)
+		if self_result.exit_code != 0 {
+			// v self failed, have to use make
+			println('v self failed, running make...')
+			make_result := os.exec('make') or {
+				panic(err)
+			}
+			println(make_result.output)
+		}
 	}
 
 	_ := os.exec('v cmd/tools/vup.v') or {