From e5b7d31abae5ecfe9449279d54973021d4c372b0 Mon Sep 17 00:00:00 2001
From: Bert Belder <bertbelder@gmail.com>
Date: Tue, 31 Jul 2018 11:19:02 +0200
Subject: tools/setup: avoid running `gn gen` twice in the same output
 directory

---
 tools/setup.py | 10 +++++++++-
 tools/util.py  |  4 ++--
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/tools/setup.py b/tools/setup.py
index 20271f4b3..19a5c07a3 100755
--- a/tools/setup.py
+++ b/tools/setup.py
@@ -33,7 +33,7 @@ def get_gn_args():
 
 
 # gn gen.
-for mode in ["release", "debug"]:
+def gn_gen(mode):
     os.environ["DENO_BUILD_MODE"] = mode
 
     gn_args = get_gn_args()
@@ -52,3 +52,11 @@ for mode in ["release", "debug"]:
 
     run([third_party.gn_path, "gen", build_path()],
         env=third_party.google_env())
+
+
+mode = build_mode(default=None)
+if mode is not None:
+    gn_gen(mode)
+else:
+    gn_gen("release")
+    gn_gen("debug")
diff --git a/tools/util.py b/tools/util.py
index 6a2da8033..77547c238 100644
--- a/tools/util.py
+++ b/tools/util.py
@@ -103,11 +103,11 @@ def rmtree(directory):
     shutil.rmtree(directory, onerror=rm_readonly)
 
 
-def build_mode():
+def build_mode(default="debug"):
     if "DENO_BUILD_MODE" in os.environ:
         return os.environ["DENO_BUILD_MODE"]
     else:
-        return "debug"
+        return default
 
 
 # E.G. "out/debug"
-- 
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