From 65e19fd9afd29fad40d733f8fdc4344234225fbd Mon Sep 17 00:00:00 2001
From: Gustavo Jose de Sousa <gustavo.sousa@intel.com>
Date: Fri, 22 Jul 2016 19:19:44 -0300
Subject: [PATCH] waf: don't update submodules if not a git repository

That is useful for releases tarballs.
---
 wscript | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/wscript b/wscript
index fa510d32ec..f94d15c175 100644
--- a/wscript
+++ b/wscript
@@ -141,7 +141,23 @@ def configure(cfg):
     cfg.load('clang_compilation_database')
     cfg.load('waf_unit_test')
     cfg.load('mavgen')
-    cfg.load('git_submodule')
+
+    cfg.env.SUBMODULE_UPDATE = cfg.options.submodule_update
+
+    cfg.start_msg('Source is git repository')
+    if cfg.srcnode.find_node('.git'):
+        cfg.end_msg('yes')
+    else:
+        cfg.end_msg('no')
+        cfg.env.SUBMODULE_UPDATE = False
+
+    cfg.start_msg('Update submodules')
+    if cfg.env.SUBMODULE_UPDATE:
+        cfg.end_msg('yes')
+        cfg.load('git_submodule')
+    else:
+        cfg.end_msg('no')
+
     if cfg.options.enable_benchmarks:
         cfg.load('gbenchmark')
     cfg.load('gtest')
@@ -172,9 +188,6 @@ def configure(cfg):
         'SKETCHBOOK="' + cfg.srcnode.abspath() + '"',
     ])
 
-    if cfg.options.submodule_update:
-        cfg.env.SUBMODULE_UPDATE = True
-
     # Always use system extensions
     cfg.define('_GNU_SOURCE', 1)